Elastic support double helix pipe-in-pipe heat exchanger

Abstract

This invention discloses a resiliently supported double-helix shell-and-tube heat exchanger, belonging to the technical field of heat exchange equipment, and solving the problems of high processing difficulty, low power-to-weight ratio, and high energy consumption of existing shell-and-tube heat exchangers. The invention includes a helical inlet pipe, a helical outlet pipe, several corrugated tubes, a helical shell, and two resilient support devices. The helical inlet pipe and helical outlet pipe are respectively disposed and attached to both sides of the helical shell, forming a helical structure; several corrugated tubes are arranged between the helical inlet pipe and the helical outlet pipe, forming a double-helix structure, with the corrugated tubes passing through the interior of the helical shell; an resilient support device is provided at each end of the helical shell. The helical inlet pipe, helical outlet pipe, and several corrugated tubes together form a DNA double-helix structure; the helical structure improves the flow channel and enhances the compactness of the internal structure of the heat exchanger; at the same time, the corrugated tubes increase the heat transfer area, causing the fluid inside the tube to generate multiple secondary flows, enhancing flow characteristics and strengthening heat transfer.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, specifically to a flexible-supported double-helix sleeve heat exchange device. Background Technology

[0002] Shell-and-tube heat exchangers are widely used heat exchange devices in industry, with applications in chemical, petroleum, energy, and pharmaceutical fields. Traditional shell-and-tube heat exchangers typically consist of an outer shell and an internal tube bundle, transferring heat through the tube walls. While this design performs well in many applications, its limitations are becoming increasingly apparent as industrial demands continue to grow, particularly in areas of high-efficiency heat exchange and space utilization.

[0003] Existing shell-and-tube heat exchangers typically consist of a shell, tube bundle, end caps, and tube sheet. The internal tube bundle generally uses a straight or U-shaped tube design, with the hot and cold fluids flowing separately inside the tubes and shell, exchanging heat through the tube walls. Taking a traditional spiral tube heat exchanger as an example, the straight tube design is replaced with a spiral shape. The spiral tube bundle increases the fluid contact area and flow path, enhancing the heat exchange effect. However, although the spiral tube design improves heat exchange efficiency, its fluid flow path is still limited, easily leading to localized temperature unevenness.

[0004] Existing spiral baffles, by adding baffles to existing spiral tube heat exchangers, effectively improve the fluid flow path inside the shell and further enhance the heat transfer effect. However, this increases the overall pressure drop of the heat exchanger, makes the structure more complex, increases the core weight, and has disadvantages such as high manufacturing difficulty, low power-to-weight ratio, and high energy consumption. In addition, the spiral tubes used in both methods are complex to manufacture and maintain, resulting in higher costs.

[0005] Chinese Patent CN219200112U discloses a spiral tube heat exchanger and boiler, which solves the problems of dry burning and low heat exchange efficiency caused by existing heat exchangers by utilizing the spiral tube form. However, this type of heat exchanger has a small number of tube passes, dense tube spacing, and a large number of turns. At the same time, the lack of support for individual tubes will eventually lead to uneven temperature distribution inside the tube and easy damage to the heat transfer elements. Chinese Patent CN202310187704.3 discloses a dual-channel spiral baffle heat exchanger and its heat exchange method. It solves the problem of uneven temperature distribution of heat transfer elements by setting mounting plates and fan-shaped plates to form internal shell-side channels. However, this heat exchanger has a larger pressure drop, requires more energy to drive the shell-side fluid, and also has problems such as low power-to-weight ratio and complex structure. Therefore, designing a heat exchanger with strong heat transfer performance, uniform fluid flow, and compact structure remains a key issue that needs to be addressed. Summary of the Invention

[0006] To address the aforementioned problems of high manufacturing difficulty, low power-to-weight ratio, and high energy consumption in existing shell-and-tube heat exchangers, this invention proposes a flexible-supported double-helix sleeve-type heat exchange device. This invention adopts a biomimetic DNA shape, with a helical inlet tube, a helical outlet tube, and several corrugated tubes forming a DNA double helix structure. These corrugated tubes pass through the interior of the helical shell. The helical structure improves the flow channel and enhances the compactness of the heat exchanger's internal structure. Simultaneously, the corrugated tubes significantly increase the heat transfer area, generating multiple secondary flows within the tubes, enhancing flow characteristics, and strengthening heat transfer.

[0007] This invention proposes an elastically supported double-helix sleeve heat exchange device, which specifically includes a helix inlet pipe, a helix outlet pipe, several corrugated pipes, a helix shell, and two elastic support devices. The helix inlet pipe and the helix outlet pipe are respectively disposed and attached to both sides of the helix shell to form a helix structure. Several corrugated pipes are disposed between the helix inlet pipe and the helix outlet pipe, and the corrugated pipes pass through the inside of the helix shell. An elastic support device is disposed at each end of the helix shell.

[0008] Furthermore, the elastic support device includes two springs and a support base plate, with the upper end of the springs connected to the spiral housing and the lower end connected to the support base plate.

[0009] Furthermore, the corrugated tube includes several straight pipes and several ellipsoidal pipes, which are alternately connected. The two ends of the corrugated tube are connected to a spiral inlet pipe and a spiral outlet pipe respectively through straight pipes.

[0010] Furthermore, the spiral shell is provided with a cover plate at one end, with a shell-side outlet pipe on one end of the cover plate and a shell-side inlet pipe on the other end and the cover plate.

[0011] Furthermore, a flexible tube is provided at the end of the shell-side outlet pipe; a straight pipe is provided at the other end of the flexible tube.

[0012] Furthermore, a flexible tube is provided at one end of the shell-side inlet pipe; a straight pipe is provided at the other end of the flexible tube.

[0013] Furthermore, one end of the spiral inlet pipe is sealed, and the other end is provided with a tube-side inlet pipe; the other end of the tube-side inlet pipe is provided with a flexible tube, and the other end of the flexible tube is provided with a straight pipe.

[0014] Furthermore, one end of the spiral outlet pipe is sealed, and the other end is provided with a pipe-side outlet pipe; the other end of the pipe-side outlet pipe is provided with a flexible tube, and the other end of the flexible tube is provided with a straight pipe.

[0015] Furthermore, the tube inlet pipe and the tube outlet pipe are located at different ends of the spiral shell.

[0016] Furthermore, a flange is provided on the straight pipe.

[0017] The beneficial effects of the elastically supported double-helix sleeve heat exchange device of the present invention are as follows:

[0018] (1) The elastically supported double-helix sleeve heat exchange device of the present invention overcomes the problems of high processing difficulty, low power-to-weight ratio and high energy consumption of existing shell-and-tube heat exchangers. By guiding the fluid through the helical shell, the problems of large mass and difficult installation caused by baffles are avoided, and the flow channel is improved. The helical shell guides the fluid to directly impact the internal heat transfer elements, ensuring the uniformity of fluid flow. At the same time, the helical direction of the helical shell and the corrugated tube is completely consistent, which optimizes the flow path of the fluid and avoids the problems of dead flow and uneven temperature.

[0019] (2) The elastically supported double spiral sleeve heat exchange device of the present invention increases the heat transfer area by setting the corrugated tube. At the same time, relying on the spiral mechanism of the spiral inlet tube and the spiral outlet tube, as well as the friction change mechanism of the corrugated tube and the structural design of the corrugated tube, the fluid in the tube generates multiple secondary flows, which enhances the flow characteristics and strengthens the heat transfer.

[0020] (3) The elastic support double helical sleeve heat exchange device of the present invention can alleviate and absorb the vibration generated during the fluid heat exchange process by setting elastic support devices at both ends of the helical shell, so as to avoid damage to the device; at the same time, it is beneficial to improve the overall vibration-enhanced heat transfer performance of the heat exchange device.

[0021] (4) The elastic support double spiral sleeve heat exchange device of the present invention can be connected and cooperated with external equipment through the flanges set at the inlet and outlet of the tube shell. The flexible hose allows the heat exchange device to be freely connected and cooperated with external equipment without being restricted by the site. It has high adaptability to complex working environments, while saving the space occupied by the equipment, thereby improving the compactness of the space layout of the entire working equipment group. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] In the attached diagram:

[0024] Figure 1 This is an isometric view of an elastically supported double-helix sleeve heat exchange device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure of the spiral inlet pipe, spiral outlet pipe, and corrugated pipe of an elastically supported double spiral sleeve heat exchange device according to the present invention.

[0026] Figure 3 This is a schematic diagram of the spiral shell structure of an elastically supported double-spiral sleeve heat exchange device according to the present invention;

[0027] Wherein: 1-Flange 1, 2-Straight pipe 1, 3-Snap 1, 4-Hose 1, 5-Shell-side outlet pipe, 6-Cover plate, 7-Spring, 8-Support base plate, 9-Pipe-side inlet pipe, 10-Spiral inlet pipe, 11-Spiral outlet pipe, 12-Spiral shell, 13-Pipe-side outlet pipe, 14-Snap 2, 15-Hose 2, 16-Straight pipe 2, 17-Flange 2, 18-Shell-side inlet pipe, 19-Corrugated pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Specific implementation method one: See Figures 1-3 This embodiment is described in detail. The elastically supported double-helix sleeve-type heat exchange device described in this embodiment specifically includes a helical inlet pipe 10, a helical outlet pipe 11, several corrugated tubes 19, a helical shell 12, and two elastic support devices. The helical inlet pipe 10 and the helical outlet pipe 11 are respectively disposed and attached to both sides of the helical shell 12, forming a helical structure. Several corrugated tubes 19 are disposed between the helical inlet pipe 10 and the helical outlet pipe 11, forming a double helix structure similar to DNA. The heat exchange medium in the helical inlet pipe 10 flows into the corrugated tubes 19, and then flows from the corrugated tubes 19 into the helical outlet pipe 11. Figure 2 As shown; several corrugated tubes 19 pass through the through holes on both sides of the spiral shell 12 and are centrally distributed along the flow direction inside the spiral shell 12. The heat exchange medium in the corrugated tubes 19 and the heat exchange medium in the spiral shell 12 exchange heat. The spiral shell 12 achieves self-flow guidance through its own spiral structure, directly scouring multiple corrugated tubes 19, improving the flow channel, making the fluid flow more uniform, and enhancing the compactness of the internal structure of the heat exchanger. The corrugated tubes 19 and the spiral shell 12 are connected together by welding. The spiral shell 12 also supports the corrugated tubes 19, the spiral inlet pipe 10, and the spiral outlet pipe 11. An elastic support device is provided at each end of the spiral shell 12 to absorb the vibration generated during the heat exchange process, prevent the vibration from being transmitted outward, and improve the overall vibration-enhanced heat transfer performance of the heat exchange device.

[0030] The elastic support device includes two springs 7 and a support base plate 8. The upper end of the spring 7 is connected to the spiral shell 12 by welding, and the lower end is connected to the support base plate 8 by welding. The springs 7 support the spiral shell 12 and absorb the vibration generated during the heat exchange process, thereby improving the overall vibration-enhancing heat transfer performance of the heat exchange device.

[0031] The corrugated tube 19 includes several straight pipes and several ellipsoidal pipes. The straight pipes and ellipsoidal pipes are connected alternately, which is conducive to the secondary flow generated by the impact of the fluid inside the tube. At the same time, it increases the contact area with the shell fluid, which is conducive to the enhanced heat transfer. The two ends of the corrugated tube 19 are connected to the spiral inlet pipe 10 and the spiral outlet pipe 11 respectively through straight pipes.

[0032] The spiral shell 12 is provided with a cover plate 6 at one end, and a shell-side outlet pipe 5 is provided on the cover plate 6 at one end, and a shell-side inlet pipe 18 is provided on the other end and the cover plate 6.

[0033] A flexible hose 4 is installed at one end of the shell-side outlet pipe 5; a straight pipe 2 is installed at the other end of the flexible hose 4; both ends of the flexible hose 4 are connected to the shell-side outlet pipe 5 and the straight pipe 2 respectively via clips 3; a flexible hose 4 is installed at one end of the shell-side inlet pipe 18; a straight pipe 2 is installed at the other end of the flexible hose 4; both ends of the flexible hose 4 are connected to the shell-side inlet pipe 18 and the straight pipe 2 respectively via clips 3. The flexible hose 4 allows the heat exchanger to be used freely without site restrictions, connecting and cooperating with external devices. It has high adaptability to complex working environments while saving space. Simultaneously, the flexible hose 4 can absorb vibrations generated during operation, reducing the transmission of vibrations and protecting the pipes from vibration damage.

[0034] like Figure 1 As shown, one end of the spiral inlet pipe 10 is sealed, and the other end is provided with a tube-side inlet pipe 9; the other end of the tube-side inlet pipe 9 is provided with a flexible hose 15, and the other end of the flexible hose 15 is provided with a straight pipe 16; the two ends of the flexible hose 15 are connected to the spiral inlet pipe 10 and the straight pipe 16 respectively by clips 14; one end of the spiral outlet pipe 11 is sealed, and the other end is provided with a tube-side outlet pipe 13; the other end of the tube-side outlet pipe 13 is provided with a flexible hose 15, and the other end of the flexible hose 15 is provided with a straight pipe 16; the two ends of the flexible hose 15 are connected to the spiral outlet pipe 11 and the straight pipe 16 respectively by clips 14. The flexible hose 15 allows the heat exchanger to be used freely without site restrictions, connecting and cooperating with external devices, providing high adaptability to complex working environments while saving space; simultaneously, the flexible hose 15 can absorb vibrations generated during the operation of the device, reducing the transmission of vibrations and protecting the pipeline from damage due to vibration.

[0035] The tube-side inlet pipe 9 and the tube-side outlet pipe 13 are respectively located at different ends of the spiral shell 12, such as Figure 1 As shown.

[0036] The straight pipe 12 is provided with flange 1; the straight pipe 26 is provided with flange 17; the straight pipe 12 and the straight pipe 26 are connected to the external device through the flanges provided on them.

[0037] The specific working process of the elastically supported double-helix sleeve heat exchange device of the present invention is as follows:

[0038] like Figure 1 , Figure 2 As shown, the tube side contains a high-temperature medium, which enters through the tube-side inlet pipe 9, flows through the spiral inlet pipe 10 into several corrugated tubes 19 to exchange heat with the low-temperature medium in the shell side, then flows into the spiral outlet pipe 11 and finally exits through the tube-side outlet pipe 13. The shell side contains a low-temperature medium, which flows through the shell-side inlet pipe 18 into the spiral shell 12 of the heat exchanger. After being guided by the spiral shell 12 and impacting the corrugated tubes 19 inside, the low-temperature medium flows out through the shell-side outlet pipe 5 after achieving flow guidance and heat exchange.

[0039] In summary, the elastically supported double-spiral sleeve heat exchange device of the present invention overcomes the problems of high processing difficulty, low power-to-weight ratio and high energy consumption of existing shell-and-tube heat exchangers. By guiding the fluid through the spiral shell 12, the problems of large mass and difficult installation caused by baffles are avoided, the flow channel is improved, and the spiral shell 12 guides the fluid to directly impact the internal heat transfer elements, ensuring the uniformity of fluid flow. Meanwhile, the spiral shell 12 and the corrugated tube 19 are arranged in the same spiral direction, optimizing the fluid flow path and avoiding dead zones and uneven temperature. The elastically supported double-spiral sleeve heat exchanger of this invention increases the heat transfer area through the corrugated tube 19. Simultaneously, relying on the spiral mechanism of the spiral inlet pipe 10 and spiral outlet pipe 11, as well as the friction-change mechanism and structural design of the corrugated tube 19, multiple secondary flows are generated within the tube, enhancing flow characteristics and strengthening heat transfer. The elastically supported double-spiral sleeve heat exchanger of this invention also mitigates and absorbs vibrations generated during fluid heat exchange through elastic support devices at both ends of the spiral shell 12, preventing damage to the device. Furthermore, it helps improve the overall vibration-enhanced heat transfer performance of the heat exchanger. The elastically supported double-helix sleeve heat exchange device of the present invention can be connected and cooperated with external equipment through flanges set at the inlet and outlet of the tube shell. The flexible hose allows the heat exchange device to be used freely without site restrictions and can be connected and cooperated with external devices. It has high adaptability to complex working environments, while saving the space occupied by the equipment, thereby improving the compactness of the entire working equipment group's spatial layout.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the invention. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A resiliently supported double-helix sleeve-type heat exchange device, characterized in that: It includes a spiral inlet pipe (10), a spiral outlet pipe (11), several corrugated pipes (19), a spiral shell (12), and two elastic support devices. The spiral inlet pipe (10) and the spiral outlet pipe (11) are respectively attached to both sides of the spiral shell (12) to form a spiral structure. Several corrugated pipes (19) are arranged between the spiral inlet pipe (10) and the spiral outlet pipe (11), and the corrugated pipes (19) pass through the inside of the spiral shell (12). An elastic support device is provided at each end of the spiral shell (12). The elastic support device includes two springs (7) and a support base plate (8). The upper end of the springs (7) is connected to the spiral shell (12), and the lower end is connected to the support base plate (8).

2. The elastic support double helix canula heat exchange device according to claim 1, characterized in that: The corrugated pipe (19) includes several straight pipes and several ellipsoidal pipes, which are alternately connected. The two ends of the corrugated pipe (19) are connected to the spiral inlet pipe (10) and the spiral outlet pipe (11) respectively through straight pipes.

3. The elastic support double helix canula heat exchange device according to claim 1, characterized in that: The spiral shell (12) is provided with a cover plate (6) at one end, and a shell-side outlet pipe (5) is provided on the cover plate (6) at one end, and a shell-side inlet pipe (18) is provided on the other end and the cover plate (6).

4. The elastic support double helix canula heat exchange device according to claim 3, characterized in that: The shell-side outlet pipe (5) is provided with a flexible hose at one end; a straight pipe is provided at the other end of the flexible hose.

5. The elastic support double helix canula heat exchange device according to claim 3, characterized in that: The shell-side inlet pipe (18) is provided with a flexible hose at one end; a straight pipe is provided at the other end of the flexible hose.

6. The elastic support double helix canula heat exchange device according to claim 1, wherein: One end of the spiral inlet pipe (10) is sealed, and the other end is provided with a pipe-side inlet pipe (9); the other end of the pipe-side inlet pipe (9) is provided with a flexible hose, and the other end of the flexible hose is provided with a straight pipe.

7. The elastic support double helix canula heat exchange device according to claim 6, wherein: One end of the spiral outlet pipe (11) is sealed, and the other end is provided with a pipe-side outlet pipe (13); the other end of the pipe-side outlet pipe (13) is provided with a flexible hose, and the other end of the flexible hose is provided with a straight pipe.

8. The elastic support double helix canula heat exchange device according to claim 7, characterized in that: The inlet pipe (9) and outlet pipe (13) are located at different ends of the spiral shell (12).

9. The elastically supported double-helix sleeve heat exchanger according to claim 4, 5, 6 or 7, characterized in that: A flange is provided on the straight pipe.

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