Wound tube type heat exchanger
By using a fully welded structure connecting the coiled tube to the tube sheet, the manufacturing process is simplified, the heat exchange area is increased, and the problems of complex structure and poor heat exchange effect of existing coiled tube heat exchangers are solved, achieving low cost and high efficiency heat exchange effect.
Patent Information
- Application Number
- CN202423221625.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing wound tube heat exchangers have complex structures, high processing costs, small heat exchange areas, and poor heat exchange effects.
The tubes are connected to the tube sheet using a fully welded structure, which increases the heat exchange area. A plug plate is installed to prevent leakage. The tube outlet is located on the side of the end cap, which simplifies the winding process, reduces the number of sealing devices, and ensures welding quality.
Reduce processing costs, improve heat exchange efficiency, enhance sealing performance, ensure welding quality, and achieve uniform heat exchange.
Smart Images
Figure CN223769310U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchangers, specifically to a wound-tube heat exchanger. Background Technology
[0002] In the process of heat exchanger tube bundle processing, the conventional heat exchanger structure is to connect the tube winding with the tube side inlet and outlet. However, the heat exchanger tube winding forming of this structure requires multiple winding calculations, has many processing steps, is troublesome to form, consumes a lot of time, and has high cost. In the existing technology, most structures also set the shell side inlet from the side of the shell, which has a small heat exchange area and poor heat exchange effect. Utility Model Content
[0003] To achieve the above objectives, this utility model provides a wound-tube heat exchanger, in which the wound tube is connected to the tube sheet, saving process steps. The material can stay briefly at the head, increasing the heat exchange area and making the heat exchange more uniform.
[0004] A wound-tube heat exchanger includes a shell and a wound tube, wherein the wound tube is located inside the shell;
[0005] The top end of the cylinder is provided with an upper end cap, and the bottom end of the cylinder is provided with a lower end cap. The upper end cap is provided with a tube-side inlet and a shell-side inlet. The shell-side inlet is located at the upper end of the upper end cap, and the tube-side inlet is located on the side of the upper end cap. The lower end cap is provided with a tube-side outlet and a shell-side outlet. The shell-side outlet is located at the lower end of the lower end cap, and the tube-side outlet is located on the side of the lower end cap.
[0006] An upper tube sheet is provided between the cylinder and the upper end cap, and a lower tube sheet is provided between the cylinder and the lower end cap. The winding tubes are all connected to the upper tube sheet and the lower tube sheet. The winding tubes are located between the upper tube sheet and the lower tube sheet. Both the upper tube sheet and the lower tube sheet are provided with a central hole. The central hole of the upper tube sheet is connected to the shell-side inlet through a shell-side connector, and the central hole of the lower tube sheet is connected to the shell-side outlet through a shell-side connector.
[0007] Preferably, a core tube is also provided inside the cylinder, the winding tube is wound on the core tube, a blocking plate is provided at the upper end of the core tube, and the core tube is fixedly connected to the upper tube plate by a stiffening plate.
[0008] Preferably, the upper end of the stiffener is fixedly connected to the upper tube sheet, and the lower side of the stiffener is fixedly connected to the core tube.
[0009] Preferably, the diameter of the end of the shell-side connector connected to the shell-side inlet is larger than the diameter of the end connected to the center hole of the upper tube sheet, and the diameter of the end of the shell-side connector connected to the shell-side outlet is larger than the diameter of the end connected to the center hole of the lower tube sheet.
[0010] Preferably, the distance between the upper tube sheet and the tube inlet is 45mm or more, and the distance between the lower tube sheet and the tube outlet is 45mm or more.
[0011] Preferably, the distance between the upper end of the core tube and the upper tube sheet is 40mm-70mm, and the distance between the lower end of the core tube and the lower tube sheet is 40mm-70mm.
[0012] The advantages of this utility model are:
[0013] 1. By sealing the core tube with a plug plate, leakage in the shell side can be effectively prevented, heat exchange efficiency can be enhanced, and energy consumption can be saved;
[0014] 2. The entire installation process is carried out by welding, which eliminates the need for additional sealing devices, resulting in good sealing performance and low cost;
[0015] 3. Compared to connecting the tube to the tube sheet, the winding process is simpler, easier to operate, and has lower processing costs;
[0016] 4. Before the material enters the winding tube, it can briefly stay inside the upper end cap, providing a buffer time to fully fill the winding tube. This serves both as a buffer for the material and ensures that the winding tube on the upper tube sheet is completely filled with material.
[0017] 5. The tube outlet is located on the side of the head, allowing it to briefly stay inside the head and preventing it from flowing out of the tube outlet quickly, thus ensuring sufficient heat exchange and guaranteeing the heat exchange effect.
[0018] 6. Positioning the tube sheet at least 45mm away from the tube inlet or outlet can effectively ensure that the welded tube inlet or outlet joints are not too close to the tube sheet seam, thus preventing welding deformation. Attached Figure Description
[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the connection structure between the tube sheet and the core tube;
[0022] Figure 3 This is the main view of the tube sheet;
[0023] Figure 4This is a top view of the tube sheet.
[0024] In the figure, 1-cylinder; 2-winding tube; 3-upper head; 4-lower head; 5-tube side inlet; 6-tube side outlet; 7-shell side inlet; 8-shell side outlet; 9-upper tube sheet; 10-lower tube sheet; 11-center hole; 12-core tube; 13-blocking plate; 14-stiffener; 15-shell side nozzle. Detailed Implementation
[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "middle", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0030] Please refer to Figures 1-4 This utility model provides a wound-tube heat exchanger, the specific scheme of which is as follows:
[0031] A wound-tube heat exchanger includes a shell 1 and wound tubes 2, the wound tubes 2 being located inside the shell 1; an upper end cap 3 is provided at the top of the shell 1, and a lower end cap 4 is provided at the bottom of the shell 1; the upper end cap 3 has a tube-side inlet 5 and a shell-side inlet 7, the shell-side inlet 7 being located at the upper end of the upper end cap 3, and the tube-side inlet 5 being located on the side of the upper end cap 3; the lower end cap 4 has a tube-side outlet 6 and a shell-side outlet 8, the shell-side outlet 8 being located at the lower end of the lower end cap 4, and the tube-side outlet 6 being located on the side of the lower end cap 4; an upper tube sheet 9 is provided between the shell 1 and the upper end cap 3, and a lower tube sheet 1 is provided between the shell 1 and the lower end cap 4. The upper tube sheet 9 is positioned at least 45mm away from the tube inlet 5. This effectively ensures that the welded tube inlet 5 will not be too close to the weld seam of the upper tube sheet 9, which could lead to welding deformation. It also allows the material to briefly stay in the upper head 3 before entering the winding tube 2, providing a buffer time to fully fill the winding tube 2. This serves both as a buffer for the material and ensures that the winding tube 2 on the upper head 3 is filled with material. After the material exits the winding tube 2, it can briefly stay in the lower head 4, preventing it from flowing out of the tube outlet 6 too quickly. This ensures sufficient heat exchange and guarantees the heat exchange effect.
[0032] One end of the coiled tube 2 is connected to the tube hole on the upper tube sheet 9, and the other end is connected to the tube hole on the lower tube sheet 10. The coiled tube 2 is set between the upper tube sheet 9 and the lower tube sheet 10. Both the upper tube sheet 9 and the lower tube sheet 10 are provided with a central hole 11. The central hole 11 of the upper tube sheet 9 is connected to the shell inlet 7 through the shell-side connector 15, and the central hole 11 of the lower tube sheet 10 is connected to the shell outlet 8 through the shell-side connector 15. A core tube 12 is also provided inside the cylinder 1. The coiled tube 2 is wound around the core tube 12. The core tube 12 is about 40mm-70mm away from the central holes of the upper and lower tube sheets. A blocking plate 13 is provided at the upper end of the core tube 12. The upper end is blocked by the blocking plate 13. The side of the blocking plate near the upper tube sheet can be set as an upwardly protruding circle to ensure that the material does not stay at the upper end of the blocking plate 13, which can effectively prevent the leakage of material flowing into the cylinder 1 from the central hole 11 and ensure the heat exchange effect. The diameter of the end of the shell-side nozzle 15 connected to the shell-side inlet 7 is larger than the diameter of the end connected to the center hole 11 of the upper tube sheet 9. The diameter of the end of the shell-side nozzle 15 connected to the shell-side outlet 8 is larger than the diameter of the end connected to the center hole 11 of the lower tube sheet 10. The reason for using different diameters is to ensure that the center hole 11 is not too large. If the opening of the center hole 11 is too large, it will affect the arrangement of the coiled tubes 2 and the heat exchange effect. If the opening of the center hole 11 is too small, the flow rate will not be able to keep up, which will also affect the heat exchange effect. The core tube 12 is fixedly connected to the upper tube sheet 9 by stiffeners 14. The stiffeners 14 are located on the outside of the center hole 11, with the upper end fixedly connected to the upper tube sheet 9 and the lower side of the stiffeners 14 fixedly connected to the core tube. Preferably, there are 3 stiffeners 14. They can be set as cuboids to ensure the welding is stable, or they can be set as polygons to facilitate the full flow of materials into the shell.
[0033] The installation process of this utility model is as follows: The outer sides of the upper tube sheet 9 and the lower tube sheet 10 are directly welded to the inner wall of the cylinder 1, ensuring full penetration without the need for additional sealing. After the winding tube 2 is installed through the upper tube sheet 9 and the lower tube sheet 10, the winding tube 2 is welded to the tube holes of the upper tube sheet 9 and the lower tube sheet 10. After welding, the shell-side nozzle 15 and the center hole 11 are welded together. The shell-side nozzle 15 is completely welded to the center hole 11, ensuring full penetration. Pressure testing fixtures are welded to the shell-side inlet 7 and shell-side outlet 8 to test the shell-side pressure and ensure no leakage. The upper end cap 3 and the lower end cap 4 are then welded together. Finally, the tube openings of the shell-side inlet 7 and shell-side outlet 8 are subjected to another shell-side pressure test to check for leaks in the tube opening welds. Finally, a tube-side pressure test is conducted to check for leaks. The entire process involves welding, full penetration, and pressure testing to ensure no leakage and guarantee a sealing effect.
[0034] The working process of this utility model is as follows: the heat exchanger flows from the tube inlet 5 through the tube opening, through the upper end cap 3 into the coiled tube 2, then through the lower end cap 4, and out through the tube inlet 4, thus completing the heat exchange process in the tube side; the heat exchanger flows from the shell inlet 7 through the shell-side connector 15 through the central hole 11 of the upper tube sheet 9 into the cylinder, where it fully exchanges heat with the material in the coiled tube, then through the central hole 11 of the lower tube sheet 10, through the shell-side connector, and out through the tube opening of the shell-side outlet 8, thus realizing the heat exchange process in the shell side.
[0035] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A spiral wound heat exchanger, characterized in that The spiral heat exchanger comprises a cylinder and a spiral pipe, and the spiral pipe is located inside the cylinder; The top end of the cylinder is provided with an upper head, and the bottom end of the cylinder is provided with a lower head; the upper head is provided with a tube pass inlet and a shell pass inlet; the shell pass inlet is arranged at the upper end of the upper head, and the tube pass inlet is arranged at the side of the upper head; the lower head is provided with a tube pass outlet and a shell pass outlet; the shell pass outlet is arranged at the lower end of the lower head, and the tube pass outlet is arranged at the side of the lower head; An upper tube plate is arranged between the cylinder and the upper head, and a lower tube plate is arranged between the cylinder and the lower head; the spiral pipe is connected with the upper tube plate and the lower tube plate; the spiral pipe is arranged between the upper tube plate and the lower tube plate; the upper tube plate and the lower tube plate are both provided with a center hole; the center hole of the upper tube plate is connected with the shell pass inlet through a shell pass connecting pipe; and the center hole of the lower tube plate is connected with the shell pass outlet through a shell pass connecting pipe.
2. A spiral wound heat exchanger according to claim 1, wherein A core pipe is further arranged inside the cylinder; the spiral pipe is wound on the core pipe; the upper end of the core pipe is provided with a baffle plate; and the core pipe is fixedly connected with the upper tube plate through a rib plate.
3. A spiral wound heat exchanger according to claim 2, wherein The upper end of the rib plate is fixedly connected with the upper tube plate, and the lower end of the rib plate is fixedly connected with the core pipe.
4. A spiral wound heat exchanger according to claim 1, wherein The diameter of one end of the shell pass connecting pipe connected with the shell pass inlet is greater than that of the other end connected with the center hole of the upper tube plate; and the diameter of one end of the shell pass connecting pipe connected with the shell pass outlet is greater than that of the other end connected with the center hole of the lower tube plate.
5. A spiral wound heat exchanger according to claim 1, wherein The distance between the upper tube plate and the tube pass inlet is greater than 45 mm, and the distance between the lower tube plate and the tube pass outlet is greater than 45 mm.
6. A spiral wound heat exchanger according to claim 2, wherein The distance between the upper end of the core pipe and the upper tube plate is 40-70 mm, and the distance between the lower end of the core pipe and the lower tube plate is 40-70 mm.