Manufacturing method of spiral baffle plate

Abstract

The invention discloses a manufacturing method of a spiral baffle plate, which comprises the following steps: integrally forming spiral baffle plate units by adopting a casting process, and splicing the integrally cast and formed spiral baffle plate units to form a radially continuous large-diameter thin-wall spiral baffle plate. And the heat exchange tube holes in the plate bodies of the spiral baffle plate units are integrally formed in the casting process, so that the heat exchange tube holes do not need to be formed in the plate bodies of the spiral baffle plates. Compared with an existing spiral baffle plate production and processing method, the spiral baffle plate production and processing method has the advantages that the process steps are simplified, and the production efficiency of the spiral baffle plate is greatly improved; the method is particularly suitable for manufacturing spiral baffling heat exchange plates with small center holes or even without center holes, and is low in operation difficulty, short in consumed time and high in percent of pass.

Description

Technical Field

[0001] The invention relates to the technical field of thermochemical reactions, and in particular to a method for manufacturing a spiral baffle. Background Art

[0002] The main limiting factor of thermochemical reactions is the heat exchange efficiency between the energy and reagent systems. The higher the exchange efficiency between the heat transfer fluid and the reagent system, the better the reaction effect. Thermochemical reactors are core equipment in the chemical industry. During the thermochemical reaction process, there are generally engineering problems such as strong heat release, heat removal, back mixing, and leakage. These problems are the key points that need to be considered and solved during the design optimization of thermochemical reactors.

[0003] Heat exchangers are equipment that transfers heat from hot fluid to cold fluid and are widely used in many industries such as petroleum, chemical industry, and food. Among them, shell and tube heat exchangers have become one of the commonly used heat exchangers due to their excellent heat transfer performance. In shell and tube heat exchangers, the shell side is usually the weak link. In order 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 areas, and easy scaling in blind areas, resulting in poor heat transfer effects. In recent years, bow-shaped baffles have gradually been replaced by spiral baffles, which just overcome the above-mentioned defects of bow-shaped baffles. However, spiral baffles are a continuous thin-walled spiral curved panel, and the plate body of the continuous thin-walled spiral curved panel also needs to be provided with heat exchange tube holes that can pass through the tube bundle, so the processing of spiral baffles is extremely difficult. At present, most manufacturers use stretching or compression molding to produce the spiral baffle plate body, and then drill the heat exchange tube holes in the spiral baffle plate body. The production method is complicated and time-consuming, and the production efficiency cannot be effectively improved. Especially for the production of spiral baffle heat exchange plates with small center holes or even no center holes, the center spiral line tends to be a straight line or is a straight line. In the process of producing spiral baffle heat exchange plates with small center holes or even no center holes by stretching or compression molding, it is easy to cause tearing in the middle area, which requires repeated welding repairs. The molding is difficult, time-consuming, and the qualified rate is low. In addition, when drilling holes for heat exchange tubes in the central area of ​​a spiral baffle heat exchange plate whose central spiral line tends to be a straight line or is a straight line, the hole spacing of the heat exchange tube holes varies too much due to the large slope of the area. Therefore, the heat exchange tube holes in this area cannot be drilled by laser cutting and must be drilled by wire cutting. However, wire cutting has a low drilling efficiency and takes longer time than stretching or die-casting the spiral baffle body, thereby further reducing the production efficiency of the spiral baffle.

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

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a method for manufacturing a spiral baffle, which greatly improves the production efficiency of the spiral baffle by combining the casting molding process with the manufacturing process of the spiral baffle. The production process is simple and easy to operate, thereby solving the technical problems of the existing spiral baffles that are difficult to manufacture and have low production efficiency.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a method for manufacturing a spiral baffle, which comprises the following specific steps:

[0007] Casting at least one spiral baffle unit by a casting process;

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

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

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

[0011] Preferably, the method for manufacturing the spiral baffle comprises the following specific steps:

[0012] A casting process is adopted to cast multiple spiral baffle plates;

[0013] A plurality of spiral baffle plates are spliced ​​together in an axial direction to form a radially continuous spiral baffle plate.

[0014] Preferably, the method for manufacturing the spiral baffle comprises the following specific steps:

[0015] A casting process is adopted to cast a plurality of spiral baffle plates, wherein the inner and outer diameters of the plurality of spiral baffle plates are matched with each other;

[0016] A plurality of the spiral baffle plates are spliced ​​together along the same spiral curvature to form radially continuous spiral baffle plates.

[0017] Preferably, the method for manufacturing the spiral baffle comprises the following specific steps:

[0018] A casting process is adopted to cast multiple groups of spiral baffle plates;

[0019] Each group of spiral baffle plates is spliced ​​together in a spiral manner along the axial direction to form a spiral baffle path dividing plate; the inner and outer diameters of the plurality of spiral baffle path dividing plates are arranged in coordination with each other;

[0020] A plurality of the spiral baffle plates are spliced ​​together along the same spiral curvature to form radially continuous spiral baffle plates.

[0021] Preferably, the method for manufacturing the spiral baffle comprises the following specific steps:

[0022] Using a casting process to cast at least one set of spiral baffle plates;

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

[0024] Using a casting process to cast at least one spiral baffle plate;

[0025] The inner and outer diameters of the plurality of spiral baffle plates are matched with each other, and the plurality of spiral baffle plates are matched and spliced ​​along the same spiral curvature to form a radially continuous spiral baffle plate.

[0026] Preferably, the method for manufacturing the spiral baffle comprises the following specific steps:

[0027] Using a casting process to cast at least one spiral baffle casting unit;

[0028] Manufacturing at least one spiral baffle non-cast unit by drawing or compression molding;

[0029] The spiral baffle casting unit and the spiral baffle non-casting unit are spliced ​​to form a radially continuous spiral baffle.

[0030] Preferably, the spiral baffle casting unit cast by the casting process is a spiral baffle plate and / or a spiral baffle path dividing plate.

[0031] Preferably, before the spiral baffle casting unit is spliced ​​with the spiral baffle non-casting unit, the heat exchange tube holes of the spiral baffle non-casting unit are opened by laser cutting process.

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

[0033] The manufacturing method of a spiral baffle described in the present invention is to integrally form the spiral baffle unit through a casting process, and then splice the integrally cast spiral baffle units to form a radially continuous large-diameter thin-walled spiral baffle; and the heat exchange tube holes on the plate body of the spiral baffle unit are integrally formed during the casting process, and there is no need to drill the heat exchange tube holes on the plate body of the spiral baffle. Compared with the existing production and processing methods of spiral baffles, it simplifies the process steps and greatly improves the production efficiency of spiral baffles; it is particularly suitable for manufacturing spiral baffle heat exchange plates with small center holes or even no center holes, with low operation difficulty, short time consumption and high pass rate.

[0034] The present invention discloses a method for manufacturing a spiral baffle. During the production process of a large-diameter thin-walled spiral baffle, a casting process is used to cast at least one spiral baffle casting unit, a stretching or die-casting process is used to manufacture at least one spiral baffle non-casting unit, and the spiral baffle casting unit is spliced ​​with the spiral baffle non-casting unit to form a radially continuous spiral baffle. By combining the casting process with the stretching or die-casting process, the production efficiency of the spiral baffle can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of an implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0036] Figure 2 It is a schematic diagram of another implementation of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0037] Figure 3 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0038] Figure 4 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0039] Figure 5 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0040] Figure 6 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0041] Figure 7 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0042] Figure 8 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0043] Fig. 9 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0044] Fig.10 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0045] Fig.11 It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention.

[0046] Fig.12It is a schematic diagram of another implementation method of the method for manufacturing the spiral baffle described in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] At present, most manufacturers use stretching or die-casting to produce the spiral baffle plate body, and then drill the heat exchange tube holes in the spiral baffle plate body. The production process is complicated and time-consuming, and the production efficiency cannot be effectively improved. At the same time, since the spiral baffle plate body is a continuous large-diameter thin-walled spiral baffle curved plate, it cannot be integrally formed by casting.

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

[0050] S1. Casting at least one spiral baffle unit by a casting process;

[0051] S2. Splicing the cast spiral baffle units to form radially continuous spiral baffles.

[0052] It is understandable that the above casting process includes but is not limited to sand casting, investment casting, pressure casting, metal mold casting and lost foam casting. By manufacturing a casting mold, liquid metal is introduced into the casting mold, and after cooling, an integrally cast spiral baffle unit is obtained; the integrally cast spiral baffle units are spliced ​​to form radially continuous large-diameter thin-walled spiral baffles. The spiral baffle units are integrally formed by a casting process, which eliminates the steps of blanking, dislocation, stretching or pressing in the existing stretching or pressing process, simplifies the process steps, and greatly improves the production efficiency of the spiral baffles.

[0053] In addition, the casting process can directly cast spiral baffle plate units whose central spiral lines tend to be straight or are straight lines, and through splicing, spiral baffle heat exchange plates with small central holes or even no central holes can be obtained. Compared with the production of spiral baffle heat exchange plates with small central holes or even no central holes by stretching or compression molding, the operation is less difficult, the time consumption is shorter, and the qualified rate is higher.

[0054] It should be further explained that each spiral baffle unit is cast with heat exchange tube holes. That is, in the process of integrally casting the spiral baffle unit, the heat exchange tube holes on the plate body of the spiral baffle unit are also synchronously cast and formed, and there is no need to drill the heat exchange tube holes on the plate body of the spiral baffle. Especially for spiral baffle heat exchange plates with small center holes or even no center holes, by casting the heat exchange tube holes in the center area, the problem of low efficiency caused by the large variation in the hole spacing of the heat exchange tube holes and the need to use wire cutting to drill holes is solved, further improving the production efficiency of the spiral baffle.

[0055] The spiral baffle unit is a spiral baffle plate and / or a spiral baffle path dividing plate, wherein the rotation angle of the spiral baffle plate is less than or equal to 360°, and the rotation angle of the spiral baffle path dividing plate is greater than or equal to 360°. The spiral baffle can be formed by splicing spiral baffle plates, or by splicing spiral baffle path dividing plates, or by splicing spiral baffle plates and spiral baffle path dividing plates. Correspondingly, the spiral baffle can be formed by splicing spiral baffle plates along the spiral rotation direction of the plate body, or by splicing spiral baffle path dividing plates along the spiral rotation direction of the plate body or along the same spiral curvature inside and outside, or by splicing spiral baffle plates and spiral baffle path dividing plates along the spiral rotation direction of the plate body or along the same spiral curvature inside and outside.

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

[0057] S1. Casting multiple spiral baffle plates by using a casting process;

[0058] S2. Splice multiple spiral baffle plates axially and spirally 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, wherein a plurality of heat exchange tube holes are distributed on the plate body of the spiral baffle plate, and the heat exchange tube holes and the plate body of the spiral baffle plate are integrally cast.

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

[0061] S1. Casting multiple spiral baffle plates by using a casting process;

[0062] S2. Splice a plurality of spiral baffle plates in an 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, wherein multiple heat exchange tube holes are distributed on the plate body of the spiral baffle plate, and the heat exchange tube holes and the plate body of the spiral baffle plate are cast as one piece.

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

[0065] S1. A plurality of spiral baffle plates are cast by a casting process, wherein the inner and outer diameters of the plurality of spiral baffle plates are matched with each other;

[0066] S2. Multiple spiral baffle plates are spliced ​​together along the same spiral curvature inside and outside to form radially continuous spiral baffle plates.

[0067] like Figure 3 As shown, the spiral baffle plate is formed by a plurality of spiral baffle plates with matching inner and outer diameters, which are spliced ​​together along the same spiral curvature. A plurality of heat exchange tube holes are distributed on the plate body of the spiral baffle plate, and the heat exchange tube holes are integrally cast with the plate body of the spiral baffle plate.

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

[0069] S1. Casting multiple sets of spiral baffle plates using a casting process;

[0070] S2, splicing each group of spiral baffle plates along the axial direction to form a spiral baffle path dividing plate; the inner and outer diameters of the plurality of spiral baffle path dividing plates are arranged in coordination with each other;

[0071] S3. Multiple spiral baffle plates are spliced ​​together along the same spiral curvature inside and outside to form radially continuous spiral baffle plates.

[0072] like Figure 4As shown, the spiral baffles are formed by splicing spiral baffle sub-plates. First, a plurality of spiral baffle diameter dividing plates with inner and outer diameters matching each other are formed by splicing spiral baffle sub-plates, and then the spiral baffle diameter dividing plates are spliced ​​together along the same spiral curvature to form a spiral baffle. Preferably, among the inner and outer adjacent spiral baffle diameter dividing plates, the outer edge heat exchange tube holes of the spiral baffle diameter dividing plates located in the inner circle are half holes, and the inner edge heat exchange tube holes of the spiral baffle diameter dividing plates located in the outer circle are also half holes that match the outer edge heat exchange tube holes of the inner circle spiral baffle diameter dividing plates. Therefore, when the inner and outer adjacent spiral baffle diameter dividing plates are spliced ​​together, the outer edge heat exchange tube holes of the inner circle spiral baffle diameter dividing plates match the inner edge heat exchange tube holes of the outer circle spiral baffle diameter dividing plates to form circular holes of the heat exchange tube holes. By the matching arrangement of the heat exchange tube holes, the heat exchange tubes passing through the heat exchange tube holes are used to strengthen the connectivity between the inner and outer adjacent spiral baffle diameter dividing plates.

[0073] In the process of casting and splicing, the spiral baffle has multiple deformation modes. In addition to using the spiral baffle plate or the spiral baffle path dividing plate alone to form the spiral baffle, according to production needs, the spiral baffle plate and the spiral baffle path dividing plate can also be spliced ​​together to obtain the spiral baffle. The manufacturing method of the spiral baffle includes the following specific steps:

[0074] S1. Casting at least one set of spiral baffle plates by a casting process;

[0075] S2, splicing each set of spiral baffle plates along the axial direction to form a spiral baffle path dividing plate;

[0076] S3, using a casting process to cast at least one spiral baffle plate;

[0077] S4. The inner and outer diameters of the plurality of spiral baffle plates are matched with each other, and the plurality of spiral baffle plates are matched and spliced ​​inside and outside along the same spiral curvature to form a radially continuous spiral baffle plate.

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

[0079] S1, using a casting process to cast at least one inner spiral baffle plate;

[0080] S2, using a casting process to cast at least one group of outer spiral baffle plates, and splicing each group of outer spiral baffle plates along the axial direction to form an outer spiral baffle path dividing plate; the inner edge of the outer spiral baffle path dividing plate is matched with the outer edge of the inner spiral baffle path dividing plate;

[0081] S3. Splice the outer spiral baffle plate 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 a combination of a spiral baffle sub-plate and a spiral baffle path dividing plate, and specifically, it is formed by a plurality of spiral baffle path dividing plates whose inner and outer diameters match each other and are spliced ​​together along the same spiral curvature, and the outer edge of the inner spiral baffle path dividing plate is spliced ​​together with the inner edge of the outer spiral baffle path dividing plate; wherein, the plate body of the outer spiral baffle path dividing plate is formed by splicing a plurality of outer spiral baffle sub-plates.

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

[0084] S1. Cast at least one set of inner spiral baffle plates by a casting process, and splice each set of inner spiral baffle plates along the axial direction to form an inner spiral baffle plate;

[0085] S2, using a casting process to cast at least one outer spiral baffle plate, wherein the inner edge of the outer spiral baffle plate is matched with the outer edge of the inner spiral baffle plate;

[0086] S3. Splice the outer spiral baffle plate 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 plate is formed by a plurality of spiral baffle plates with matching inner and outer diameters, which are spliced ​​together along the same spiral curvature, and the outer edge of the inner spiral baffle plate is spliced ​​together with the inner edge of the outer spiral baffle plate; wherein, the plate body of the inner spiral baffle plate is formed by splicing a plurality of inner spiral baffle sub-plates.

[0088] By casting a split unit structure and combining and splicing the split unit structure to form a spiral baffle, the casting process is used to break through the problems of the existing production of spiral baffle heat exchange plates with small or even no center hole, which are difficult to produce, time-consuming and have a low pass rate. The heat exchange tube holes are cast in one piece, directly omitting the original heat exchange tube hole opening step, further improving the production efficiency of the spiral baffle.

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

[0090] S1. Casting at least one spiral baffle casting unit by a casting process; wherein the spiral baffle casting unit is a spiral baffle plate and / or a spiral baffle path dividing plate;

[0091] S2. Manufacturing at least one spiral baffle non-casting unit by a drawing or die-casting process;

[0092] S3. Splice the spiral baffle casting unit and the spiral baffle non-cast unit to form a radially continuous spiral baffle; wherein, before splicing the spiral baffle casting unit and the spiral baffle non-cast unit, a laser cutting process is used to open heat exchange tube holes in the spiral baffle non-cast unit.

[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 spiral baffle plate and the outer spiral baffle plate is cast by a casting process, and the other is manufactured by a stretching or compression molding process. Finally, 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. Before splicing the inner spiral baffle plate and the outer spiral baffle plate, the plate manufactured by the stretching or compression molding process is laser-opened.

[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 by a stretching or compression molding process, wherein the outer edge of the inner spiral baffle plate is matched with the inner edge of the outer spiral baffle plate;

[0096] S2, using a casting process to cast at least one outer spiral baffle plate;

[0097] S3. Splice the outer spiral baffle plate 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 of the outer spiral baffle plate. The heat exchange tube holes of the inner spiral baffle plate manufactured by the stretching or die-casting process can be opened by the laser opening process before the inner spiral baffle plate is spliced ​​with the outer spiral baffle plate; or the heat exchange tube holes can be opened by the laser opening process after the inner spiral baffle plate is spliced ​​with the outer spiral baffle plate; the method of splicing first and then opening can allow the laser to more accurately lock the center point of the spiral baffle plate, and the laser opening accuracy is higher.

[0099] The outer spiral baffle plate in the above solution can be formed by splicing a plurality of outer spiral baffle plates, as shown in FIG. 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 by a stretching or compression molding process, wherein the outer edge of the inner spiral baffle plate is matched with the inner edge of the outer spiral baffle plate;

[0101] S2, using a casting process to cast at least one set of external spiral baffle plates;

[0102] S3, splicing each group of external spiral baffle plates along the axial direction to form an external spiral baffle plate;

[0103] S4. Splice the outer spiral baffle plate 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 the outer edge surface is relatively low, and the heat exchange tube holes can be directly opened by laser drilling, which has high efficiency and high hole opening accuracy; and because the center hole of the outer spiral baffle plate is relatively large, the production efficiency is high by using a stretching or die-casting process. Therefore, in the process of producing large-diameter spiral baffles, the inner spiral baffle plate is produced by a casting process, and the outer spiral baffle plate is produced by a stretching or die-casting process, which can further improve the production efficiency of the spiral baffles.

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

[0106] S1, using a casting process to cast at least one inner spiral baffle plate;

[0107] S2, using a stretching or compression molding process to manufacture at least one outer spiral baffle plate, wherein the inner edge of the outer spiral baffle plate is matched with the outer edge of the inner spiral baffle plate;

[0108] S3. Splice the outer spiral baffle plate 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 Fig. 9 As shown, the heat exchange tube holes on the inner spiral baffle plate are integrally cast with the plate body of the inner spiral baffle plate. Before the inner spiral baffle plate is spliced ​​with the outer spiral baffle plate, the heat exchange tube holes are opened on the outer spiral baffle plate.

[0110] for Fig. 9 The outer spiral baffle plate shown can use a laser hole-making process to make holes for heat exchange tubes before splicing it with the inner spiral baffle plate; it can also use a laser hole-making process to make holes for heat exchange tubes after splicing it with the inner spiral baffle plate; wherein, the method of splicing first and then making holes can allow the laser to more accurately lock the center point of the spiral baffle plate, and the laser hole-making accuracy is higher.

[0111] like Fig.10As shown, in another preferred embodiment, compared with Fig. 9 As for the embodiment, the difference is that after the inner spiral baffle plate and the outer spiral baffle plate are spliced ​​together, the laser opening process is used to open the heat exchange tube holes in the outer spiral baffle plate.

[0112] The inner spiral baffle plate in the above solution can be formed by splicing a plurality of inner spiral baffle plates, as shown in FIG. Fig.11 As shown, in another preferred embodiment, the method for manufacturing the spiral baffle comprises the following specific steps:

[0113] S1. Casting at least one set of inner spiral baffle plates by a casting process;

[0114] S2, splicing each group of inner spiral baffle plates along the axial direction to form an inner spiral baffle plate;

[0115] S3, using a stretching or compression molding process to manufacture at least one outer spiral baffle plate, wherein the inner edge of the outer spiral baffle plate is matched with the outer edge of the inner spiral baffle plate;

[0116] S4. Splice the outer spiral baffle plate 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 Fig.12 As shown, in another preferred embodiment, compared with Fig.11 As for the embodiment, the difference is that after the inner spiral baffle plate and the outer spiral baffle plate are spliced ​​together, the laser opening process is used to open the heat exchange tube holes in the outer spiral baffle plate.

[0118] In summary, the manufacturing method of a spiral baffle provided by an embodiment of the present invention is to integrally form a spiral baffle unit through a casting process, and then splice the integrally cast spiral baffle units to form a radially continuous large-diameter thin-walled spiral baffle; and the heat exchange tube holes on the plate body of the spiral baffle unit are integrally formed during the casting process, and there is no need to drill the heat exchange tube holes on the plate body of the spiral baffle. Compared with the existing production and processing methods of spiral baffles, it simplifies the process steps and greatly improves the production efficiency of spiral baffles; it is particularly suitable for manufacturing spiral baffle heat exchange plates with small center holes or even no center holes, with low operation difficulty, short time consumption and high pass rate.

[0119] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for manufacturing a spiral baffle, characterized in that: The specific steps include: Casting at least one spiral baffle unit by a casting process; The cast spiral baffle units are spliced ​​to form radially continuous spiral baffles.

2. The method for manufacturing a spiral baffle according to claim 1, characterized in that: Each spiral baffle unit is cast with a heat exchange tube hole.

3. The method for manufacturing a spiral baffle according to claim 1, characterized in that: The spiral baffle plate unit is a spiral baffle plate and / or a spiral baffle path dividing plate. The rotation angle of the spiral baffle plate is less than or equal to 360°, and the rotation angle of the spiral baffle path dividing plate is greater than or equal to 360°.

4. The method for manufacturing a spiral baffle according to any one of claims 1 to 3, characterized in that: The manufacturing method of the spiral baffle comprises the following specific steps: A casting process is adopted to cast multiple spiral baffle plates; A plurality of spiral baffle plates are spliced ​​together in an axial direction to form a radially continuous spiral baffle plate.

5. The method for manufacturing a spiral baffle according to any one of claims 1 to 3, characterized in that: The manufacturing method of the spiral baffle comprises the following specific steps: A casting process is adopted to cast a plurality of spiral baffle plates, wherein the inner and outer diameters of the plurality of spiral baffle plates are matched with each other; A plurality of the spiral baffle plates are spliced ​​together along the same spiral curvature to form radially continuous spiral baffle plates.

6. The method for manufacturing a spiral baffle according to any one of claims 1 to 3, characterized in that: The manufacturing method of the spiral baffle comprises the following specific steps: A casting process is adopted to cast multiple groups of spiral baffle plates; Each group of spiral baffle plates is spliced ​​together in a spiral manner along the axial direction to form a spiral baffle path dividing plate; the inner and outer diameters of the plurality of spiral baffle path dividing plates are arranged in coordination with each other; A plurality of the spiral baffle plates are spliced ​​together along the same spiral curvature to form radially continuous spiral baffle plates.

7. The method for manufacturing a spiral baffle according to any one of claims 1 to 3, characterized in that: The manufacturing method of the spiral baffle comprises the following specific steps: Using a casting process to cast at least one set of spiral baffle plates; Each set of spiral baffle plates is spliced ​​together along the axial direction to form a spiral baffle path dividing plate; Using a casting process to cast at least one spiral baffle plate; The inner and outer diameters of the plurality of spiral baffle plates are matched with each other, and the plurality of spiral baffle plates are matched and spliced ​​along the same spiral curvature to form a radially continuous spiral baffle plate.

8. The method for manufacturing a spiral baffle according to any one of claims 1 to 3, characterized in that: The manufacturing method of the spiral baffle comprises the following specific steps: Using a casting process to cast at least one spiral baffle casting unit; Manufacturing at least one spiral baffle non-cast unit by drawing or compression molding; The spiral baffle casting unit and the spiral baffle non-casting unit are spliced ​​to form a radially continuous spiral baffle.

9. The method for manufacturing a spiral baffle according to claim 8, characterized in that: The spiral baffle casting unit cast by the casting process is a spiral baffle plate and / or a spiral baffle path dividing plate.

10. The method for manufacturing a spiral baffle according to claim 8, characterized in that: Before the spiral baffle casting unit and the spiral baffle non-casting unit are spliced, the heat exchange tube holes of the spiral baffle non-casting unit are opened by a laser cutting process.

Images