Aluminum finned tube support process

Abstract

The application discloses an aluminum finned tube supporting process. The aluminum finned tube position is positioned by positioning blocks, the fin part size of the finned tube which needs to be installed with a supporting block is pressed to the inner diameter size of the supporting block by a collecting die, the supporting block is then installed, and the outer diameter of the supporting block is trimmed by an outer diameter pressing die so as to be the same as the size of the surrounding fins. The application sets the supporting blocks with circular covering fins on the aluminum finned tube to replace the hole plate or the corrugated plate, supports the fins with small gaps, and guarantees that the aluminum finned tube will not be deformed in the middle and will not be damaged due to vibration during work.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger finned tube manufacturing technology, and specifically relates to an aluminum finned tube support process. Background Technology

[0002] The heat exchanger finned tubes are made of BFe10-1-1 base tubes and 1060 aluminum alloy fins. This type of aluminum finned tube has relatively poor rigidity; when both ends are fixed, the middle section deforms downwards under gravity. During actual operation, the finned tubes are impacted by airflow, causing vibration and collisions, leading to damage and loosening of the connection between the tube head and the tube sheet. To address this issue, a certain number of supports are added to the finned tubes, effectively reducing deformation in the middle section.

[0003] Traditional supports typically use perforated plates or corrugated plates. However, when the gaps between the fins on an aluminum finned tube are small, perforated plates or corrugated plates cannot be used to support the tube, necessitating the design of a new support method to address this issue.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an aluminum finned tube support process, which overcomes the defects in the prior art by setting a support block covering the outer diameter of the aluminum fins.

[0006] To achieve the above objectives, the present invention provides an aluminum finned tube support process, the steps of which are as follows: (1) Make positioning holes on the base, take the initial positioning hole as position 0, the second positioning hole as position 1, and so on; install the positioning block at position 1, and fix the diameter reduction mold at position 0; (2) After the aluminum finned tube passes through the center hole of the reducing die, one end is placed against the positioning port on the positioning block; (3) Tap the upper end of the reducing mold and rotate the aluminum finned tube at the same time to press the finned part of the support block to the inner diameter of the support block; (4) Move the positioning block to the next position and repeat step (3) until all the fin parts on the aluminum finned tube that need to be supported are pressed into place. (5) Embed the support block into the fin part where the support block needs to be installed, and the support block forms a circle covering the fin part; (6) Pull the aluminum finned tube out of the center hole of the reducing die, disassemble the reducing die from position 0, fix the lower die of the outer diameter pressing die of the support block at position 0, move the positioning block to position 1, and place the aluminum finned tube through the center hole of the lower die of the outer diameter pressing die of the support block and abut the positioning port on the positioning block. Place the upper die of the outer diameter pressing die of the support block on the lower die by pin. (7) Tap the upper end of the outer diameter mold of the support block, and at the same time rotate the aluminum fin tube to adjust the outer diameter of the support block until the outer diameter of the support block is the same as the outer diameter of the fin next to the support block installation location. (8) Move the positioning block to the next position and repeat step (7) until the outer diameter of all the support blocks on the aluminum finned tube is the same as the outer diameter of the fin next to the installation support block, thus completing the support of the aluminum finned tube.

[0007] Preferably, in the technical solution, the aluminum finned tube is made by inserting a base tube into an aluminum tube and extruding the aluminum tube into fins using a rolling mill.

[0008] Preferably, in the technical solution, the support block has an arc-shaped structure, the two sides of the support block have folded edges, the head of the support block is provided with a dovetail-shaped locking block, and the tail of the support block is provided with a dovetail groove.

[0009] Preferably, in the technical solution, the support block is embedded in the fin part where the support block needs to be installed, and a circle is formed by the dovetail-shaped clip and the dovetail groove being inlaid end to end to cover the fin part, and the two sides of the support block are embedded in the gap of the fin.

[0010] Preferably, in the technical solution, the positioning block has a rectangular structure, and the positioning hole on the positioning block is set facing the 0 position, and the size of the positioning hole matches the size of the aluminum finned tube.

[0011] Preferably, in the technical solution, the reducing die includes an upper block and a lower block, each with a semi-circular hole. The upper block and the lower block are connected to form a central hole for the reducing die. The size of the central hole for the reducing die matches the size of the aluminum finned tube. The upper block has a raised striking part for the reducing die.

[0012] Preferably, in the technical solution, the outer diameter pressing mold of the support block includes an upper mold and a lower mold. The upper mold and the lower mold are respectively provided with semi-circular holes. The upper mold and the lower mold are connected to form the outer diameter pressing mold center hole. The size of the outer diameter pressing mold center hole matches the size of the aluminum finned tube. The upper mold is provided with a protruding outer diameter pressing mold striking part.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By setting multiple circular support blocks covering the fins on the aluminum finned tube to replace the perforated plate or corrugated plate, the support for the fins with small gaps is satisfied, ensuring that the aluminum finned tube will not deform in the middle and will not be damaged by vibration during operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the initial structure of the aluminum finned tube of the present invention; Figure 2 This is a schematic diagram of the aluminum finned tube structure after diameter reduction according to the present invention; Figure 3 This is a schematic diagram of the aluminum finned tube structure after the support is completed according to the present invention; Figure 4 This is a schematic diagram of the support block structure of the present invention; Figure 5 This is a schematic diagram of the support block of the present invention unfolded along the circumferential direction; Figure 6 This is a schematic diagram of the positioning block structure of the present invention; Figure 7 This is a schematic diagram of the diameter reduction die structure of the present invention; Figure 8 This is a schematic diagram of the outer diameter compression molding structure of the support block of the present invention; Figure 9 This is a schematic diagram of the aluminum finned tube of the present invention in the state of reduced diameter; Figure 10 This is a schematic diagram of the outer diameter pressing state of the aluminum finned tube support block of the present invention. Detailed Implementation

[0015] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0016] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0017] A process for supporting aluminum finned tubes includes the following steps: (1) The aluminum finned tube 1 is made by inserting a base tube into an aluminum tube and extruding the aluminum tube into fins 2 using a rolling mill. The outer diameter of the fins 2 is Φ34±0.2mm, and the gap between the fins 2 is 2±0.05mm. Figure 1 As shown; Φ8.2 positioning holes 4 are opened on the base 3 made of No. 10 channel steel, and the positioning holes 4 are sequentially designated as positions 0, 1, ..., n from the initial position; the positioning block 5 is installed at position 1, and the reducing mold 6 is fixed at position 0, as shown. Figure 9 As shown; (2) After the aluminum finned tube 1 passes through the center hole 62 of the reducing die 6 between the upper block 60 and the lower block 61, one end of the tube abuts against the positioning opening with a radius of 10mm on the positioning block 5, such as... Figure 6 , 7 As shown in Figure 9; (3) Strike the striking part 63 of the finishing die at the top of the finishing die, and at the same time rotate the aluminum finned tube 1 to press the fin 2 part where the support block 7 needs to be installed to Φ32.5mm; (4) Move the positioning block 5 to position 2, position 3, ..., position n, and repeat step (3) until all the fins 2 on the aluminum finned tube 1 that require the installation of the support block 7 are pressed into place, such as Figure 2 As shown; (5) The support block 7 has an arc-shaped structure, with folded edges 70 on both sides. A dovetail-shaped locking block 71 is provided at the head of the support block 7, and a dovetail groove 72 is provided at the tail. The support block 7 is embedded into the fin 2 where it needs to be installed. The dovetail-shaped locking block 71 and the dovetail groove 72 are inlaid end-to-end to form a circle covering the fin 2 at that location. The folded edges 70 on both sides of the support block 7 are embedded into the gaps in the fin 2. Figure 4 , 5 As shown; (6) Pull the aluminum finned tube 1 out from the center hole 62 of the reducing die, disassemble the reducing die 6 from position 0, fix the lower die 81 of the outer diameter pressing die 8 of the support block at position 0, move the positioning block 5 to position 1, and place the aluminum finned tube 1 through the center hole 82 of the outer diameter pressing die 8 of the support block at the positioning port 50 on the positioning block 5. Place the upper die 80 of the outer diameter pressing die 8 of the support block on the lower die 81 by a pin. Figure 6 , 8 As shown in Figure 10; (7) Strik the outer diameter stamping part 83 of the outer diameter stamping mold 8 of the support block, and at the same time rotate the aluminum fin tube 1 to adjust the outer diameter of the support block 7 until the outer diameter of the support block 7 reaches Φ34±0.2mm; (8) Move the positioning block 5 to position 2, position 3, ..., position n, and repeat step (7) until the outer diameter of all support blocks 7 on the aluminum finned tube 1 is Φ34±0.2mm, thus completing the support of the aluminum finned tube 1. Figure 3 As shown.

[0018] By setting multiple circular support blocks 7 covering the fins 2 on the aluminum finned tube 1 to replace the perforated plate or corrugated plate, the support for the fins 2 with small gaps is satisfied, ensuring that the aluminum finned tube 1 will not deform in the middle and will not be damaged by vibration during operation.

[0019] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An aluminum finned tube support process, the steps of which are: (1) opening positioning holes on the base, taking the initial positioning hole as position 0, the second positioning hole as position 1, and so on; installing the positioning block at position 1, and fixing the diameter reduction mold at position 0; (2) After the aluminum finned tube passes through the center hole of the reducing die, one end is placed against the positioning port on the positioning block; (3) Tap the upper end of the reducing mold and rotate the aluminum finned tube at the same time to press the finned part of the support block to the inner diameter of the support block; (4) Move the positioning block to the next position and repeat step (3) until all the fin parts on the aluminum finned tube that need to be supported are pressed into place. (5) Embed the support block into the fin part where the support block needs to be installed, and the support block forms a circle covering the fin part; (6) Pull the aluminum finned tube out of the center hole of the reducing die, disassemble the reducing die from position 0, fix the lower die of the outer diameter pressing die of the support block at position 0, move the positioning block to position 1, and place the aluminum finned tube through the center hole of the lower die of the outer diameter pressing die of the support block and abut the positioning port on the positioning block. Place the upper die of the outer diameter pressing die of the support block on the lower die by pin. (7) Tap the upper end of the outer diameter mold of the support block, and at the same time rotate the aluminum fin tube to adjust the outer diameter of the support block until the outer diameter of the support block is the same as the outer diameter of the fin next to the support block installation location. (8) Move the positioning block to the next position and repeat step (7) until the outer diameter of all the support blocks on the aluminum finned tube is the same as the outer diameter of the fin next to the installation support block, thus completing the support of the aluminum finned tube.

2. The aluminum finned tube support process of claim 1, wherein: Aluminum finned tubes are made by inserting a base tube into an aluminum tube and then extruding the aluminum tube into fins using a rolling mill.

3. The aluminum finned tube support process of claim 1, wherein: The support block has an arc-shaped structure with folded edges on both sides. The head of the support block is equipped with a dovetail-shaped locking block, and the tail of the support block is equipped with a dovetail groove.

4. The aluminum finned tube support process of claim 3, wherein: The support block is embedded in the fin part where the support block needs to be installed. A dovetail-shaped clip and a dovetail groove are inlaid at both ends to form a circle covering the fin part. The folded edges on both sides of the support block are embedded in the gaps of the fin.

5. The aluminum finned tube support process of claim 1, wherein: The positioning block has a rectangular structure, and the positioning hole on the positioning block is set facing position 0. The size of the positioning hole matches the size of the aluminum finned tube.

6. The aluminum finned tube support process of claim 1, wherein: The shrinking die includes an upper block and a lower block. The upper block and the lower block are respectively provided with semi-circular holes. The upper block and the lower block are connected to form the central hole of the shrinking die. The size of the central hole of the shrinking die matches the size of the aluminum finned tube. The upper block is provided with a raised shrinking die striking part.

7. The aluminum finned tube support process of claim 1, wherein: The outer diameter pressing mold of the support block includes an upper mold and a lower mold. The upper mold and the lower mold are respectively provided with semi-circular holes. The upper mold and the lower mold are connected to form the outer diameter pressing mold center hole. The size of the outer diameter pressing mold center hole matches the size of the aluminum finned tube. The upper mold is provided with a raised outer diameter pressing mold striking part.

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