Tubular heat exchanger with fin turning and expanding adjustable and adjusting method of tubular heat exchanger

Abstract

The invention relates to a heat exchange technology, in particular to a tubular heat exchanger with fins capable of being turned over and expanded to be adjustable and an adjusting method thereof.The tubular heat exchanger comprises a heat exchanger shell, tube boxes installed at the two ends of the heat exchanger shell and tube plates arranged between the heat exchanger shell and the tube boxes, and a plurality of heat transfer tubes are installed in the heat exchanger shell; and an expansion fin structure is arranged on the heat transfer pipe. According to the tubular heat exchanger, dynamic adjustment of the heat exchange area is achieved through the reasonably-designed structural combination and connection relation of the expanded fin structure and the driving structure, the heat exchange efficiency and the equipment adaptability are remarkably improved, and specifically, the expanded fin structure enables the heat exchanger to meet the requirements of different working conditions according to the requirements of different working conditions. The heat exchange area is flexibly adjusted, the dynamic adjusting capacity not only improves the efficiency of the heat exchanger under different operation conditions, but also reduces energy waste caused by the fixed heat exchange area, and therefore higher energy utilization efficiency is achieved.

Description

Technical Field

[0001] The invention relates to a heat exchange technology, in particular to a tubular heat exchanger with adjustable fin flipping and expansion and an adjustment method thereof. Background Art

[0002] A tubular heat exchanger is a device used to exchange heat between two fluids. Its core structure consists of a heat exchanger shell, a tube box, a tube sheet, and heat transfer tubes. The heat exchanger shell forms the external frame of the equipment, and numerous heat transfer tubes are installed inside. These heat transfer tubes are key components for heat transfer. The tube box is located at both ends of the shell and is responsible for distributing and collecting the fluid, ensuring that the fluid can enter and flow out of the heat transfer tubes evenly. The tube sheet is fixed between the shell and the tube box to support the heat transfer tubes and maintain their position.

[0003] In traditional tubular heat exchanger designs, the heat exchange area is pre-set and cannot be changed. This fixed design makes it impossible for the heat exchanger to flexibly adjust the heat exchange efficiency according to actual needs when facing different operating conditions. This limitation is particularly evident in practical applications, causing many inconveniences and additional costs to industrial production. First, under high-load operation, the fixed heat exchange area is often difficult to meet the needs of efficient heat transfer. Since the heat exchange area cannot be increased, the heat exchanger is inefficient when processing large amounts of heat, resulting in limited performance of the entire system. This not only affects production efficiency, but may also cause equipment overheating, increase the risk of equipment damage, and thus affect the continuity and stability of production.

[0004] Secondly, when operating at low load, an excessively large heat exchange area will lead to energy waste. During operation, even if the heat demand is low, the heat exchanger will consume too much energy due to the excessive heat exchange area. This not only increases operating costs, but also creates an unnecessary burden on the environment. In addition, the design of a fixed heat exchange area lacks adaptability to different fluid flow rates and temperature changes, making it difficult for the heat exchanger to meet diverse heat exchange requirements when facing complex industrial applications. In summary, the design of a fixed heat exchange area for traditional tubular heat exchangers has obvious limitations and cannot meet the high requirements for heat exchange efficiency, energy utilization, and equipment adaptability in modern industrial production. Summary of the Invention

[0005] The object of the present invention is to provide a tubular heat exchanger with adjustable fin flipping and expansion and an adjustment method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A tubular heat exchanger with adjustable fin rotation and expansion comprises a heat exchanger housing, tube boxes mounted at both ends of the heat exchanger housing, and tube sheets disposed between the heat exchanger housing and the tube boxes. A plurality of heat transfer tubes are mounted within the heat exchanger housing, and each heat transfer tube is provided with an expansion fin structure connected to a drive structure mounted on the tube box. The extended fin structure includes a plurality of fixed fins connected to each other by the connecting member and an extension member installed in the fixed fins. The driving structure includes a rotating member fixed to one end of the connecting member, a driving disk rotatably connected to the rotating member, and a driving source installed on the pipe box for driving the driving disk to rotate. When the driving disk rotates, it drives the plurality of rotating members to rotate, thereby driving the fixed fins to flip on the heat transfer tube, so that the expansion member can expand and adjust on the fixed fins.

[0007] The tubular heat exchanger with adjustable fin flipping and expansion as described above: a plurality of baffles are provided inside the heat exchanger shell and are sleeved with the heat transfer tubes; one end of the heat transfer tube is provided on one of the tube sheets, and the other end is plugged into the other tube sheet.

[0008] The tubular heat exchanger with adjustable fin flipping and expansion as described above: the connecting member includes four linkage rods provided on the fixed fins; Sleeves are fixed at both ends of the linkage rod. The sleeve located at the end where the heat transfer tube and the tube sheet are plugged in is flush with one end of the heat transfer tube and rotates on the tube box. The sleeve located at the end where the heat transfer tube and the tube sheet are fixed is shorter than the heat transfer tube and rotates on the tube box.

[0009] The tubular heat exchanger with adjustable fin flipping and expansion as described above: the expansion member includes a gear ring provided on the outer wall of the heat transfer tube, a linkage mechanism meshing with the gear ring, and an expansion fin connected to the linkage mechanism and sliding within the fixed fin; Two expansion fins are symmetrically arranged inside the fixed fins.

[0010] The tubular heat exchanger with adjustable fin flipping and expansion as described above: the linkage mechanism includes a gear meshing with the ring gear and screws provided at both ends of the gear; The gear rotates at the center of the cavity of the fixed fin.

[0011] The tubular heat exchanger with adjustable fin rotation and expansion as described above: the rotating member includes a collar provided on the sleeve at one end where the heat transfer tube and the tube sheet are connected, and a connecting block provided on the collar; The combined longitudinal section of the collar and the connecting block is Z-shaped.

[0012] The tubular heat exchanger with adjustable fin flipping and expansion as described above: the driving disk is provided with a plurality of slots, and the slots are rotatably connected to the fixing pins fixed on the connecting block.

[0013] The tubular heat exchanger with adjustable fin rotation and expansion as described above: the driving source includes a motor mounted on the tube box, a support member mounted in the tube box cavity, and a Z-shaped rod provided on the output shaft of the motor and mounted on the support member; The longitudinal section of the Z-shaped rod is Z-shaped, and the other end of the Z-shaped rod is fixed to the center of the driving disk.

[0014] The tubular heat exchanger with adjustable fin flipping and expansion as described above: the support member includes a cross arranged on the inner wall of the tube box and a bearing installed at the center of the cross and connected to the Z-shaped rod.

[0015] The adjustment method of the tubular heat exchanger with adjustable fin flipping and expansion as described above comprises the following steps: Step 1: Start the motor installed on the pipe box, the output shaft of the motor starts to rotate, and the output shaft of the motor drives the driving disk to rotate through the Z-shaped rod; Step 2: When the driving disc rotates, the slotted holes and the fixed pins cooperate to drive several rotating parts to rotate, thereby driving the fixed fins to flip on the heat transfer tubes; Step 3: As the fixed fin flips, the extension piece installed inside it starts to move. The ring gear is set on the outer wall of the heat transfer tube, and the gear meshing with the ring gear rotates in the center of the fixed fin cavity; Step 4: The screws at both ends of the gear rotate accordingly, driving the expansion fins connected to the screws to slide inside the fixed fins to achieve expansion adjustment; Step 5: After completing the flipping and expansion adjustment of the fins, turn off the motor and stop the operation of the drive source.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Through the rationally designed structural combination and connection relationship of the extended fin structure and the drive structure, the tubular heat exchanger of the present invention achieves dynamic adjustment of the heat exchange area, significantly improving the heat exchange efficiency and adaptability of the equipment. Specifically, the extended fin structure enables the heat exchanger to flexibly adjust the heat exchange area according to different operating conditions. This dynamic adjustment capability not only improves the efficiency of the heat exchanger under different operating conditions, but also reduces the energy waste caused by the fixed heat exchange area, thereby achieving higher energy utilization efficiency.

[0017] In actual applications, through the precise control of the drive structure, the extended fin structure can achieve expansion and contraction movements. This process allows the heat exchanger to adjust the heat exchange area in real time according to different heat exchange conditions, thereby optimizing the heat exchange effect. For example, under conditions requiring higher heat exchange efficiency, the extended fins can be fully expanded to increase the heat exchange area; when the heat exchange demand is low, the fins can be partially or completely contracted to reduce the heat exchange area. This flexible adjustment method enables the heat exchanger to better adapt to different fluid flow rates and temperature changes, thereby maintaining efficient heat exchange performance in various industrial applications.

[0018] In addition, the design of the extended fin structure also enhances the flexibility and adaptability of the heat exchanger. By precisely controlling the flipping and expansion of the fins, the heat exchanger can better adapt to different fluid flow rates and temperature changes. This design not only improves the versatility of the heat exchanger, but also reduces the additional costs caused by equipment replacement or modification. In actual operation, this dynamic adjustment capability enables the heat exchanger to dynamically adjust the heat exchange area under different working conditions to achieve optimal heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a tubular heat exchanger with adjustable fin flip extension.

[0020] Figure 2 Schematic diagram of the internal structure of a tubular heat exchanger with adjustable fin flipping and expansion.

[0021] Figure 3 This is a schematic diagram of the structure of the heat transfer tube combination in a tubular heat exchanger with adjustable fin flipping and expansion.

[0022] Figure 4 This is a schematic diagram of the structure of another orientation of the heat transfer tube in a tubular heat exchanger with adjustable fin flipping and expansion.

[0023] Figure 5 Schematic diagram of the expansion structure in a tubular heat exchanger with adjustable fin flip expansion.

[0024] Figure 6 This is a structural schematic diagram of another orientation of the expansion structure in a tubular heat exchanger with adjustable fin flip expansion.

[0025] Figure 7 Schematic diagram of the structure of fixed fins in a tubular heat exchanger with adjustable fin flipping and extension.

[0026] Figure 8 Schematic diagram of the structure of fixed fins and connectors in a tubular heat exchanger with adjustable fin flipping and expansion.

[0027] Figure 9 Schematic diagram of the structure of the extended fins in a tubular heat exchanger with adjustable fin flipping and extension.

[0028] Figure 10 Schematic diagram of the structure of the heat transfer tube in a tubular heat exchanger with adjustable fin flipping and expansion.

[0029] Figure 11 Schematic diagram of the structure of the linkage and extended fins in a tubular heat exchanger with adjustable fin flipping and extension.

[0030] Figure 12 Schematic diagram of the structure of the linkage in a tubular heat exchanger with adjustable fin flipping and extension.

[0031] Figure 13 Schematic diagram of the structure of the driving source and rotating parts in a tubular heat exchanger with adjustable fin flipping and expansion.

[0032] Figure 14 Schematic diagram of the structure of the rotating parts in a tubular heat exchanger with adjustable fin flipping and extension.

[0033] Figure 15 Schematic diagram of the structure of the driving source in a tubular heat exchanger with adjustable fin flipping and expansion.

[0034] In the figure: 1. Heat exchanger shell; 2. Tube box; 3. Tube sheet; 4. Heat transfer tube; 5. Baffle; 6. Ring gear; 7. Gear; 8. Screw; 9. Extension fin; 10. Fixed fin; 11. Linkage rod; 12. Ring; 13. Connecting block; 14. Drive plate; 15. Z-rod; 16. Cross; 17. Motor. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figures 1 to 4 In an embodiment of the present invention, a tubular heat exchanger with adjustable fin rotation and expansion includes a heat exchanger shell 1, a tube box 2 installed at both ends of the heat exchanger shell 1, and a tube sheet 3 arranged between the heat exchanger shell 1 and the tube box 2. A plurality of heat transfer tubes 4 are installed in the heat exchanger shell 1, and the heat transfer tubes 4 are provided with an expansion fin structure. The expansion fin structure is connected to a drive structure installed on the tube box 2. The extended fin structure includes a plurality of fixed fins 10 connected to each other by the connecting member and an extension member installed in the fixed fins 10. The driving structure includes a rotating member fixed to one end of the connecting member, a driving disk 14 rotatably connected to the rotating member, and a driving source installed on the pipe box 2 for driving the driving disk 14 to rotate. When the driving disk 14 rotates, it drives several of the rotating members to rotate, thereby driving the fixed fins 10 to flip on the heat transfer tube 4, so that the expansion member can expand and adjust on the fixed fins 10.

[0037] In this embodiment, the heat exchanger housing 1 serves as the main frame of the entire heat exchanger, and houses a number of heat transfer tubes 4. The heat transfer tubes 4 are evenly distributed along the length of the heat exchanger housing 1, ensuring sufficient contact between the fluids during the heat exchange process, thereby achieving efficient heat transfer. The outer walls of the heat transfer tubes 4 are provided with an extended fin structure, which is a key component for dynamically adjusting the heat exchange area of ​​the heat exchanger. The fixed fins 10 are rotatably mounted on the heat transfer tubes 4 via connectors. Driven by the drive structure, they can be flipped. The extended members installed in the fixed fins 10 further enhance the heat exchange capacity. By adjusting the extension within the fixed fins 10, the heat exchange area can be precisely adjusted according to different operating conditions to achieve the optimal heat exchange effect. The driving structure is installed on the pipe box 2 and is connected to the extended fin structure. The rotating member is fixedly connected to one end of the connecting member. This connection method ensures stable power transmission. When the driving source is started, it drives several rotating members to rotate synchronously through the rotation of the driving disk 14. This rotational motion is transmitted to the fixed fin 10 through the connecting member, so that the fixed fin 10 can flip smoothly on the heat transfer tube 4. As the fixed fin 10 flips, the extension member also moves accordingly, realizing expansion adjustment on the fixed fin 10, improving the flexibility and adaptability of the heat exchanger, and enhancing its heat exchange performance under different working conditions, so that it can be widely used in various industrial fields to meet diverse heat exchange needs.

[0038] See also Figure 3 and Figure 4 As a further solution of the present invention, a plurality of baffles 5 are provided inside the heat exchanger shell 1 and are sleeved with the heat transfer tube 4. One end of the heat transfer tube 4 is provided on one of the tube sheets 3, and the other end is inserted into the other tube sheet 3.

[0039] In this embodiment, a plurality of baffles 5 are provided inside the heat exchanger housing 1. These baffles 5 are nested with the heat transfer tubes 4. That is, the baffles 5 are arranged at regular intervals along the interior space of the heat exchanger housing 1. When the fluid flows in the heat exchanger housing 1, it is guided by the baffles 5 to form a tortuous flow path, thereby increasing the contact time and contact area between the fluid and the outer wall of the heat transfer tube 4, thereby effectively improving the heat exchange efficiency. The two ends of the heat transfer tube 4 are connected in different ways: one end is firmly fixed to a pipe box 2 by welding or other fixing methods. This fixing method ensures the stability of the heat transfer tube 4 during operation and prevents loosening or displacement caused by changes in fluid pressure or temperature. The other end is connected to another pipe box 2 by plugging. At the same time, a mechanical seal is provided between the pipe box 2 and the heat transfer tube 4 to ensure sealing and prevent fluid leakage.

[0040] See also Figure 5 and Figure 6 , as a further solution of the present invention, the connecting member includes four linkage rods 11 provided on the fixed fin 10; Sleeves are fixed at both ends of the linkage rod 11. The sleeve located at the end where the heat transfer tube 4 and the tube sheet 3 are connected is flush with one end of the heat transfer tube 4 and rotates on the tube box 2. The sleeve located at the end where the heat transfer tube 4 and the tube sheet 3 are fixed is shorter than the heat transfer tube 4 and rotates on the tube box 2.

[0041] In this embodiment, the connecting member is composed of four linkage rods 11, which are evenly arranged on the fixed fins 10 to form a stable connection structure. Sleeves are installed at both ends of each linkage rod 11. The design of these sleeves fully considers the connection method and spatial layout between the heat transfer tube 4 and the tube box 2. The outer end surface of the sleeve located at the connection end of the heat transfer tube 4 and the tube sheet 3 is flush with the end of the heat transfer tube 4. This design ensures that when the heat transfer tube 4 is connected, the sleeve can fit tightly against the inner wall of the tube box 2, thereby achieving stable rotation. The sleeve at the fixed end of the heat transfer tube 4 and the tube sheet 3 is shorter than the heat transfer tube 4. This design is to adapt to the fixed connection between the tube box 2 and the heat transfer tube 4, ensuring that when the heat transfer tube 4 is fixed, the sleeve can rotate freely on the tube box 2 without being restricted by the length of the heat transfer tube 4. Through the design of the connector, the fixed fin 10 can rotate smoothly and flexibly on the heat transfer tube 4, thereby realizing the flipping and expansion adjustment functions of the fin, thereby improving the heat exchange efficiency of the heat exchanger.

[0042] See also Figures 7 to 12 As a further solution of the present invention, the extension member includes a gear ring 6 provided on the outer wall of the heat transfer tube 4, a linkage mechanism engaged with the gear ring 6, and an extension fin 9 connected to the linkage mechanism and sliding within the fixed fin 10; Two expansion fins 9 are symmetrically arranged inside the fixed fin 10 .

[0043] The linkage mechanism includes a gear 7 meshing with the ring gear 6 and screws 8 provided at both ends of the gear 7; The gear 7 rotates at the center of the cavity of the fixed fin 10 .

[0044] In this embodiment, the extension member includes a gear ring 6 provided on the outer wall of the heat transfer tube 4, a linkage mechanism meshing with the gear ring 6, and an extension fin 9 connected to the linkage mechanism, so that the extension fin 9 can be flexibly slid and adjusted within the fixed fin 10, thereby realizing dynamic changes in the heat exchange area; Specifically, the ring gear 6 is tightly mounted on the outer wall of the heat transfer tube 4, forming an integral unit with the heat transfer tube 4. The outer side of the ring gear 6 meshes with the gear 7 in the linkage mechanism. This meshing relationship ensures accurate power transmission. The gear 7 is mounted in the center of the cavity of the fixed fin 10. Its position design allows the gear 7 to rotate smoothly. Screws 8 are fixed to both ends of the gear 7. The rotation of the screw 8 directly drives the expansion fin 9 to slide within the fixed fin 10. Two extended fins 9 are symmetrically arranged inside the fixed fins 10. This symmetrical design not only enhances the stability of the structure, but also enables the extended fins 9 to evenly adjust the heat exchange area during the sliding process. When the gear 7 rotates, the screw 8 rotates accordingly, thereby pushing the extended fins 9 to slide along the inner wall of the fixed fins 10. The heat exchange area can be flexibly increased or decreased according to different working conditions, thereby achieving efficient heat exchange effects. At the same time, after the extended fins 9 are expanded and rotate around the outer wall of the heat transfer tube 4, they can clean impurities such as scale attached to the outer wall of the heat transfer tube 4 to a certain extent, thereby improving the heat exchange effect of the heat transfer tube 4. Through the extension design, the heat exchanger can dynamically adjust the heat exchange area by adjusting the position of the extension fins 9 under different working conditions to achieve optimal heat exchange efficiency. This design not only improves the flexibility and adaptability of the heat exchanger, but also enhances its performance in various industrial applications.

[0045] See also Figure 13 and Figure 14 As a further solution of the present invention, the rotating member includes a collar 12 provided on the sleeve at one end where the heat transfer tube 4 and the tube sheet 3 are connected, and a connecting block 13 provided on the collar 12; The combined longitudinal section of the collar 12 and the connecting block 13 is Z-shaped.

[0046] In this embodiment, the rotating member is composed of a collar 12 and a connecting block 13. The collar 12 is mounted on a sleeve located at the end where the heat transfer tube 4 and the tube sheet 3 are connected. This fixing method ensures a tight connection between the collar 12 and the sleeve, thereby enabling stable rotation when the heat transfer tube 4 is connected. The connecting block 13 is mounted on the collar 12. It is particularly noteworthy that the longitudinal section of the combination of the collar 12 and the connecting block 13 is Z-shaped. This unique Z-shaped design is of great significance. The collar 12 and the connecting block 13 of the Z-shaped structure can make it possible for several rotating parts to be combined and driven synchronously in a more compact manner, thereby improving the space optimization effect and enabling the rotating parts to be arranged more compactly within a limited space while ensuring their flexibility of movement. When the driving disc 14 rotates, the rotating member can rotate smoothly through the cooperation between the slotted hole on it and the fixing pin on the connecting block 13. This rotation is transmitted to the fixed fin 10 through the connecting member, thereby driving the fixed fin 10 to flip on the heat transfer tube 4. The rotating member design not only ensures the accuracy and stability of the fin flipping action, but also improves the operating efficiency and reliability of the entire heat exchanger, enabling it to operate stably under various working conditions.

[0047] See also Figure 13 and Figure 15 As a further solution of the present invention, a plurality of slots are provided on the driving disk 14 , and the slots are rotatably connected to the fixing pins fixed on the connecting block 13 .

[0048] The driving source includes a motor 17 mounted on the pipe box 2, a support member mounted in the cavity of the pipe box 2, and a Z-shaped rod 15 provided on the output shaft of the motor 17 and mounted on the support member; The longitudinal section of the Z-shaped rod 15 is Z-shaped, and the other end of the Z-shaped rod 15 is fixed to the center of the driving disk 14 .

[0049] The support member includes a cross 16 provided on the inner wall of the pipe box 2 and a bearing installed at the center of the cross 16 and connected to the Z-shaped rod 15 .

[0050] In this embodiment, a plurality of slots are evenly distributed on the driving disk 14. The shape and size of these slots match the fixing pins on the connecting block 13, so that the fixing pins can be stably inserted into the slots and realize rotational connection. This design not only ensures the smooth transmission of power, but also allows the connecting block 13 to flexibly follow the movement when the driving disk 14 rotates, thereby driving the fixed fins 10 to flip. The driving source is composed of a motor 17, a support and a Z-shaped rod 15 installed on the pipe box 2. The motor 17 serves as a power source, and its output shaft is connected to the driving disc 14 through the Z-shaped rod 15. The longitudinal section of the Z-shaped rod 15 is Z-shaped. This shape design enables the Z-shaped rod 15 to achieve efficient torque transmission in a limited space, while enhancing the stability and reliability of the structure. One end of the Z-shaped rod 15 is set on the output shaft of the motor 17, and the other end is fixed to the center of the driving disc 14, ensuring that power can be directly and stably transmitted to the driving disc 14. In conjunction with the rotational connection between the driving disc 14 and the fixing pin, when the driving disc 14 rotates, it can drive several connecting blocks 13 fixed to the fixing pin to rotate with the corresponding collar 12 as the center of the circle, so that when the driving disc 14 rotates, it can drive multiple linkage rods 11 to rotate, thereby realizing synchronous rotation requirements and ensuring transmission effect. The design of the support further enhances the stability of the entire drive structure. The support comprises a cross 16 provided on the inner wall of the pipe box 2 and a bearing mounted at the center of the cross 16. The bearing is connected to the Z-shaped rod 15, providing stable support for the rotation of the Z-shaped rod 15, reducing friction and wear during rotation, and improving the service life and operating efficiency of the drive structure. The design of the cross 16 provides a solid mounting base for the bearing, ensuring the stability of the entire drive structure during operation. Through the design of the drive disk 14 and the drive source, the heat exchanger can achieve precise flipping of the fixed fins 10 and dynamic adjustment of the extended fins 9. This design not only improves the heat exchange efficiency of the heat exchanger, but also enhances its adaptability and flexibility under different working conditions, enabling it to be widely used in various industrial fields.

[0051] The adjustment method of the tubular heat exchanger with adjustable fin flipping and expansion as described above comprises the following steps: Step 1: Start the motor 17 installed on the pipe box 2, and the output shaft of the motor 17 starts to rotate, and the output shaft of the motor 17 drives the driving disk 14 to rotate through the Z-shaped rod 15; Step 2: When the driving disc 14 rotates, the slotted holes cooperate with the fixing pins to drive the rotating parts to rotate, thereby driving the fixed fins 10 to flip on the heat transfer tube 4; Step 3: As the fixed fin 10 flips, the extension piece installed inside it starts to move. The ring gear 6 is set on the outer wall of the heat transfer tube 4, and the gear 7 engaged with the ring gear 6 rotates at the center of the fixed fin 10 cavity; Step 4: The screws 8 at both ends of the gear 7 rotate accordingly, thereby driving the expansion fins 9 connected to the screws 8 to slide inside the fixed fins 10 to achieve expansion adjustment; Step 5: After the fins are flipped and expanded, the motor 17 is turned off to stop the operation of the driving source.

[0052] The above embodiments are exemplary rather than restrictive, so any technical solution that can be implemented in other specific forms without departing from the spirit or basic features of the present invention is included in the present invention.

Claims

1. A tubular heat exchanger with adjustable fin rotation and expansion, comprising a heat exchanger shell (1), tube boxes (2) mounted at both ends of the heat exchanger shell (1), and a tube sheet (3) arranged between the heat exchanger shell (1) and the tube box (2), characterized in that: A plurality of heat transfer tubes (4) are installed in the heat exchanger shell (1), and an extended fin structure is provided on the heat transfer tube (4), and the extended fin structure is connected to a drive structure installed on the tube box (2); The extended fin structure comprises a plurality of fixed fins (10) connected to each other via the connecting piece and rotating on the heat transfer tube (4), and an extension piece installed in the fixed fins (10); The driving structure comprises a rotating member fixed to one end of the connecting member, a driving disc (14) rotatably connected to the rotating member, and a driving source mounted on the pipe box (2) for driving the driving disc (14) to rotate. When the driving disc (14) rotates, it drives a plurality of the rotating members to rotate, thereby driving the fixed fins (10) to flip on the heat transfer tube (4), so that the expansion member can be expanded and adjusted on the fixed fins (10).

2. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 1, characterized in that: A plurality of baffles (5) sleeved with the heat transfer tubes (4) are provided inside the heat exchanger shell (1); one end of the heat transfer tube (4) is provided on one of the tube sheets (3), and the other end is plugged into the other tube sheet (3).

3. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 1, characterized in that: The connecting member comprises four linkage rods (11) arranged on the fixed fin (10); Sleeves are fixed at both ends of the linkage rod (11); the sleeve at the end where the heat transfer tube (4) and the tube sheet (3) are connected is flush with one end of the heat transfer tube (4) and rotates on the tube box (2); the sleeve at the end where the heat transfer tube (4) and the tube sheet (3) are fixed is shorter than the heat transfer tube (4) and rotates on the tube box (2).

4. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 1, characterized in that: The extension member comprises a gear ring (6) provided on the outer wall of the heat transfer tube (4), a linkage mechanism meshing with the gear ring (6), and an extension fin (9) connected to the linkage mechanism and sliding within the fixed fin (10); Two of the extended fins (9) are symmetrically arranged inside the fixed fin (10).

5. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 4, characterized in that: The linkage mechanism comprises a gear (7) meshing with the ring gear (6) and screws (8) arranged at both ends of the gear (7); The gear (7) rotates at the center of the cavity of the fixed fin (10).

6. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 3, characterized in that: The rotating member comprises a collar (12) provided on the sleeve at one end where the heat transfer tube (4) and the tube plate (3) are connected, and a connecting block (13) provided on the collar (12); The combined longitudinal section of the collar (12) and the connecting block (13) is Z-shaped.

7. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 6, characterized in that: The driving disk (14) is provided with a plurality of slots, and the slots are rotatably connected to the fixing pins fixed on the connecting block (13).

8. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 1, characterized in that: The driving source comprises a motor (17) mounted on the pipe box (2), a support member mounted in the cavity of the pipe box (2), and a Z-shaped rod (15) arranged on the output shaft of the motor (17) and mounted on the support member; The longitudinal section of the Z-shaped rod (15) is Z-shaped, and the other end of the Z-shaped rod (15) is fixed to the center of the driving disk (14).

9. The tubular heat exchanger with adjustable fin flipping and expansion according to claim 8, characterized in that: The support member comprises a cross (16) arranged on the inner wall of the pipe box (2) and a bearing installed at the center of the cross (16) and connected to the Z-shaped rod (15).

10. A method for adjusting a tubular heat exchanger with adjustable fin flipping and expansion according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Start the motor (17) installed on the pipe box (2), the output shaft of the motor (17) starts to rotate, and the output shaft of the motor (17) drives the driving disk (14) to rotate through the Z-shaped rod (15); Step 2: When the driving disc (14) rotates, the slotted holes cooperate with the fixing pins to drive the plurality of rotating parts to rotate, thereby driving the fixed fins (10) to flip on the heat transfer tube (4); Step 3: As the fixed fin (10) turns over, the extension piece installed therein starts to move, the gear ring (6) is set on the outer wall of the heat transfer tube (4), and the gear (7) meshing with the gear ring (6) rotates at the center of the fixed fin (10) cavity; Step 4: The screws (8) at both ends of the gear (7) rotate accordingly, thereby driving the expansion fins (9) connected to the screws (8) to slide inside the fixed fins (10), thereby achieving expansion adjustment; Step 5: After the fins are flipped and expanded, the motor (17) is turned off to stop the operation of the driving source.

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