A shell-and-tube heat exchanger

Abstract

A shell-and-tube heat exchanger comprises an adjusting component, a heat exchanger shell, a material inlet pipe and a material outlet pipe fixed at both ends of the heat exchanger shell in the length direction, a heat exchange shell fixed inside the heat exchanger shell, a medium inlet pipe and a medium outlet pipe fixed at both ends of the heat exchange shell, an elastic spiral pipe with variable length, sliding plates fixed at both ends of the elastic spiral pipe in the length direction, and two bellows respectively located at both ends of the elastic spiral pipe; one of the bellows is connected with the material inlet pipe and the elastic spiral pipe, and the other is connected with the elastic spiral pipe and the material outlet pipe; the elastic spiral pipe penetrates through a through hole inside the heat exchange shell, the adjusting component changes the distance between the two sliding plates, and the length of the elastic spiral pipe at both ends moving out of the heat exchange shell can be adjusted. The high-efficiency shell-and-tube heat exchanger can adjust the length of the material pipe formed by the elastic spiral pipe in the heat exchange shell, facilitate heat exchange at different times, and thus meet the heat exchange requirements of different materials.

Description

Technical Field

[0001] This invention relates to the field of heat exchangers, and in particular to a shell-and-tube heat exchanger. Background Technology

[0002] In existing technologies, the length of the heat exchanger tubes in heat exchangers is fixed. For example, Chinese utility model patent CN204649020U, entitled "A High-Efficiency Shell-and-Tube Heat Exchanger," discloses a high-efficiency shell-and-tube heat exchanger. In this technical solution, the lengths of the metal corrugated tube and the material tube are both fixed, resulting in a fixed material heat exchange time. However, different heat exchange fluids have different heat exchange efficiencies, so the required residence time in the material tank also varies. Heat exchangers with fixed material tanks cannot meet the needs of different heat exchange fluids, thus limiting their application.

[0003] Therefore, there is an urgent need for a heat exchanger that can adjust the length of the material tube inside the heat exchange shell to facilitate heat exchange at different times and thus meet the heat exchange requirements of different materials. Summary of the Invention

[0004] The purpose of this invention is to provide a heat exchanger that can adjust the length of the material tube inside the heat exchange shell.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A shell-and-tube heat exchanger includes an adjusting component, a heat exchanger shell, a material inlet pipe and a material outlet pipe fixed at both ends along the length of the heat exchanger shell, a heat exchange shell with an annular cross-section fixed inside the heat exchanger shell, a medium inlet pipe and a medium outlet pipe fixed at both ends of the heat exchange shell, an elastic spiral tube with a variable length, sliding plates fixed at both ends along the axial direction of the elastic spiral tube, and two corrugated pipes located at both ends of the elastic spiral tube.

[0007] One of the corrugated pipes connects the material inlet pipe and the flexible spiral pipe, and the other corrugated pipe connects the flexible spiral pipe and the material outlet pipe;

[0008] The elastic spiral tube passes through a through hole inside the heat exchange shell. The adjusting component changes the distance between the two slide plates, and the length by which the elastic spiral tube moves axially out of the heat exchange shell is adjustable.

[0009] Furthermore, the ends of the medium inlet pipe and the medium outlet pipe that are away from the heat exchange shell extend to the outer side of the heat exchanger shell, respectively; the length direction of the medium inlet pipe and the medium outlet pipe is arranged radially along the heat exchange shell.

[0010] The adjusting component includes two threaded rods rotatably mounted on the outer wall of the heat exchanger shell, two push plates movably sleeved on the corresponding medium inlet pipe and medium outlet pipe, a pushing mechanism, and a transmission structure mounted on the outer wall of the heat exchanger shell.

[0011] One end of each pusher plate is threadedly connected to a threaded rod located on the same side of the heat exchange shell. The transmission mechanism drives the threaded rod to rotate, causing the corresponding pushers located on both radial sides of the heat exchange shell to move closer to or further away from the heat exchange shell.

[0012] Two push plates are built into the heat exchanger shell and located outside the heat exchanger shell, and are arranged perpendicular to the slide plate;

[0013] The pushing mechanism converts the linear motion of the two push plates in the radial direction of the heat exchange shell into the linear motion of the two slide plates in the longitudinal direction of the heat exchange shell.

[0014] Furthermore, the pushing mechanism includes four push rods, with each end of the slide connected to two push plates via inclined push rods; each push rod is hinged to the slide and push plate corresponding to its position.

[0015] The two adjacent push rods are arranged symmetrically, with the axis of symmetry being the center line of the two push plates or the center line of the two slide plates.

[0016] Furthermore, connecting blocks are fixedly provided at both ends of the slide plate and both ends of the push plate, and a pivot pin is rotatably provided inside the connecting block, with both ends of the push rod rotatably connected to the corresponding pivot pin.

[0017] Furthermore, the transmission mechanism includes two spur gears and a crown gear meshing with the spur gears. The two spur gears are respectively fixed and coaxially sleeved on the corresponding threaded rods located at one end of the heat exchanger shell.

[0018] The heat exchanger shell is cylindrical, and the crown gear is coaxially sleeved on the outside of the heat exchanger shell;

[0019] The crown gear can rotate relative to the heat exchanger housing, causing the crown gear to rotate and drive the two threaded rods to rotate.

[0020] Furthermore, the transmission mechanism also includes a first movable ring and a second movable ring coaxial with the rotating ring, and a plurality of slide rods passing through both ends of the rotating ring along its axial direction.

[0021] The rotating ring is disposed between the first movable ring and the second movable ring;

[0022] The crown gear is fixedly mounted on the side of the first movable ring near the spur gear, and the two ends of the slide rod are fixedly connected to the corresponding first movable ring and second movable ring respectively;

[0023] Each slide bar has a spring movably connected to its wall. The two ends of the spring are fixedly connected to the rotating ring and the second movable ring, respectively. When the second movable ring is pressed, the first movable ring drives the crown gear to approach the spur gear.

[0024] Furthermore, the outer wall is provided with anti-slip texture.

[0025] Furthermore, both the material inlet pipe and the material outlet pipe are fixedly equipped with connecting flanges at their outer ends.

[0026] Furthermore, the inner wall of the elastic spiral tube is provided with a heat insulation layer.

[0027] Furthermore, both threaded rods are rotatably connected to the heat exchanger housing via sealed bearings.

[0028] The heat exchanger provided by the present invention, as described above, has the following beneficial effects:

[0029] It features adjustable material tube length within the heat exchange shell, facilitating heat exchange for varying durations and thus meeting the heat exchange requirements of different materials. This solves the problem in existing high-efficiency shell-and-tube heat exchangers where both the metal bellows and material tube lengths are fixed, resulting in a fixed heat exchange time. Since different heat exchange fluids have varying heat exchange efficiencies, the required residence time within the material tube also differs. Heat exchangers with fixed material tube lengths struggle to meet the needs of different heat exchange fluids. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0031] Figure 1 This is a schematic diagram of the structure of a shell-and-tube heat exchanger provided by the present invention;

[0032] Figure 2 for Figure 1 Internal structure diagram;

[0033] Figure 3 for Figure 2 Enlarged view of the structure at point A;

[0034] Figure 4 for Figure 2 A three-dimensional cross-sectional view of the heat exchange shell.

[0035] Figure label:

[0036] 1. Heat exchanger shell; 2. Material inlet pipe; 3. Material outlet pipe; 4. Heat exchanger shell; 5. Medium inlet pipe; 6. Medium outlet pipe; 7. Flexible spiral tube; 8. Slide plate; 9. Push plate; 10. Push rod; 11. Connecting block; 12. Shaft pin; 13. Threaded rod; 14. Spur gear; 15. Rotating ring; 16. First movable ring; 17. Crown gear; 18. Second movable ring; 19. Slide rod; 20. Spring; 21. Bellows. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1-4 As shown, a shell-and-tube heat exchanger includes an adjusting component, a heat exchanger shell 1, a material inlet pipe 2 and a material outlet pipe 3 fixed at both ends along the length of the heat exchanger shell 1, a heat exchange shell 4 fixed inside the heat exchanger shell 1, a medium inlet pipe 4 and a medium outlet pipe 6 fixed at both ends of the heat exchange shell 4, an elastic spiral tube 7 with adjustable length, a sliding plate 8 fixed at both ends along the length of the elastic spiral tube 7, and two corrugated pipes 21 located at both ends of the elastic spiral tube 7.

[0039] The flexible helical tube 7 is helical in shape and its length can be changed. It is similar to a compressible and elongated spring tube. The two ends of the flexible helical tube 7 are fixedly connected to the bellows 21.

[0040] One of the corrugated pipes 21 connects the material inlet pipe 2 and the flexible spiral pipe 7, and the other corrugated pipe 21 connects the flexible spiral pipe 7 and the material outlet pipe 3.

[0041] Material inlet pipe 2 and material outlet pipe 3 are fixedly installed on both sides of the heat exchanger shell 1, and a heat exchange shell 4 is fixedly installed in the middle of the heat exchanger shell 1. Medium inlet pipe 5 and medium outlet pipe 6 are fixedly installed at both ends of the heat exchange shell 4, and one end of the medium inlet pipe 5 and medium outlet pipe 6 extends to the outside of the heat exchanger shell 1. An elastic spiral tube 7 is installed on the inside of the heat exchange shell 4. The heat exchange shell 4 is shaped like a closed ring, and the elastic spiral tube 7 is fitted in the middle of the ring and passes through both ends of the ring along its axial direction. This achieves a through hole for the elastic spiral tube 7 to pass through the inside of the heat exchange shell 4. Slide plates 8 are fixedly fitted at both ends of the elastic spiral tube 7. The slide plates 8 have through holes for fitting the two ends of the elastic spiral tube 7. After the two ends of the elastic spiral tube 7 pass through the slide plates 8, they are connected to the corresponding corrugated pipes 2.

[0042] The adjusting component changes the distance between the two slide plates 8, changes the density of the spiral tube 7, and ultimately adjusts the length of the two ends of the elastic spiral tube 7 that are moved out of the heat exchange shell 4.

[0043] Preferably, the ends of the medium inlet pipe 5 and the medium outlet pipe 6 that are away from the heat exchange shell 4 extend to the outside of the heat exchanger shell 1.

[0044] The regulating component includes two symmetrically arranged threaded rods 13 that are evenly distributed and rotatably mounted on the outer wall of the heat exchanger shell 1.

[0045] Two push plates 9, a pushing mechanism, and a transmission structure installed on the outer wall of the heat exchanger shell 1 are respectively movably sleeved on the corresponding medium inlet pipe 5 and medium outlet pipe 6;

[0046] One end of each push plate 9 is threadedly connected to the threaded rod 13 located on the same side of the heat exchange shell 4. The transmission mechanism drives the threaded rod 13 to rotate, causing the corresponding push plates 9 located on both radial sides of the heat exchange shell 4 to move closer to or further away from the heat exchange shell 4.

[0047] Two push plates 9 are built into the heat exchanger housing 1 and are arranged perpendicular to the slide plate 8;

[0048] The pushing mechanism converts the linear motion of the two push plates 9 in the radial direction of the heat exchange shell 4 into the linear motion of the two slide plates 8 in the longitudinal direction of the heat exchange shell 4.

[0049] Specifically, the heat exchanger shell 1 and heat exchanger housing 4 are arranged coaxially, and the length direction of the two threaded rods 13 is distributed radially along the heat exchanger housing 4. The two threaded rods 13 are evenly distributed circumferentially on the heat exchanger shell 1. A pushing mechanism for moving the two sliding plates 8 is provided between the two threaded rods 13. Two push plates 9 are respectively movably sleeved on the outer walls of the corresponding medium inlet pipe 5 and medium outlet pipe 6. The length direction of the medium inlet pipe 5 and medium outlet pipe 6 points radially to the heat exchanger housing 4, and the medium inlet pipe 5 and medium outlet pipe 6 guide the push plates 9. The two push plates 9 are distributed in the area between the heat exchanger housing 4 and the heat exchanger shell 1. One end of each push plate 9 is threadedly sleeved on the wall of the corresponding threaded rod 13.

[0050] The pushing mechanism includes four push rods 10, and each end of the slide plate 8 is connected to two push plates 9 by the inclined push rods 10;

[0051] The two adjacent push rods 10 are arranged symmetrically, with the axis of symmetry being the center line of the two push plates 9 or the center line of the two slide plates 8. The axes of symmetry among the four push rods 10 are cross-shaped.

[0052] The preferred driving mechanism consists of four push rods 10. Each push rod 10 is hinged to one end of a corresponding slide plate 8 and one end of a push plate 9. Connecting blocks 11 are fixedly installed at both ends of the slide plate 8 and both ends of the push plate 9. The connecting blocks 11 have grooves inside, and rotatable pins 12 are mounted inside the grooves. The two ends of each push rod 10 are rotatably engaged with their corresponding pins 12. Along the direction from the push plate 9 to the elastic spiral tube 7, the two push rods 10 located at the ends of each push plate 9 are arranged in a V-shape. Initially, the push plate 9 can approach or adhere to the inner wall of the heat exchanger shell 1. As the threaded rod 13 rotates, the push plate 9 moves closer to the heat exchange shell 4, increasing the angle between the two push rods 10 connected to each push plate 9, i.e., increasing the distance between the ends of these two push rods 10 closest to the slide plate 8. This causes the slide plate 8 to move outward, pulling apart the elastic spiral tube 7.

[0053] Both ends of the slide plate 8 and both ends of the push plate 9 are fixedly provided with connecting blocks 11. The connecting blocks 11 are rotatably provided with shaft pins 12. Both ends of the push rod 10 are rotatably connected to the corresponding shaft pins 12.

[0054] The outer wall of the heat exchanger shell 1 is provided with a transmission mechanism that drives the threaded rods 13 on both sides to rotate. The transmission mechanism includes two spur gears 14 and a crown gear 17 that meshes with the spur gears 14. The two spur gears 14 are respectively fixed and coaxially sleeved on the corresponding threaded rods 13 located at one end of the heat exchanger shell 1.

[0055] The heat exchanger housing 1 is cylindrical, and the crown gear 17 is coaxially sleeved on the outside of the heat exchanger housing 1.

[0056] The crown gear 17 can rotate relative to the heat exchanger housing 1, causing the crown gear 17 to rotate and drive the two threaded rods 13 to rotate.

[0057] The transmission mechanism also includes a first movable ring 16 and a second movable ring 18 coaxial with the rotating ring 15, and a slide rod 19 passing through both axial ends of the rotating ring 15;

[0058] The rotating ring 15 is disposed between the first movable ring 16 and the second movable ring 18;

[0059] The crown gear 17 is fixedly disposed on the side of the first movable ring 16 near the spur gear 14, and the two ends of the slide rod 19 are fixedly connected to the corresponding first movable ring 16 and second movable ring 18 respectively;

[0060] A spring 20 is movably sleeved on the wall of the slide rod 19. The two ends of the spring 20 are fixedly connected to the rotating ring 15 and the second movable ring 18, respectively. When the second movable ring 18 is pressed, the first movable ring 16 drives the crown gear 17 to approach the spur gear 14.

[0061] Specifically, the transmission mechanism includes spur gears 14 and crown gears 17. Two spur gears 14 are respectively fixedly sleeved on the outer ends of corresponding threaded rods 13. A rotating ring 15 is rotatably sleeved on the outer wall of the heat exchanger shell 1. A first movable ring 16 and a second movable ring 18 are respectively arranged on both sides of the rotating ring 15. The crown gear 17 is fixedly arranged on the side of the first movable ring 16 closest to the spur gears 14, i.e., away from the rotating ring 15. The crown gear 17 matches both spur gears 14. Slide rods 19 are movably sleeved inside both ends of the rotating ring 15. Preferably, there are two slide rods 19, evenly distributed around the circumference of the rotating ring 15. The two ends of the slide rods 19 are fixedly connected to the corresponding first movable ring 16 and second movable ring 18, respectively. A spring 20 is movably sleeved on the wall of the slide rod 19. One end of the spring 20 is fixedly connected to one side of the rotating ring 15, and the other end is fixedly connected to one side of the second movable ring 18, facilitating the movement and resetting of the first movable ring 16 towards the side closer to the rotating ring 15.

[0062] Preferably, the outer wall of the rotating ring 15 is provided with anti-slip texture. This increases the friction between the hand and the rotating ring 15, minimizing slippage during rotation.

[0063] Preferably, both the material inlet pipe 2 and the material outlet pipe 3 are fixedly equipped with connecting flanges at their outer ends. This facilitates the connection of external pipes to the material inlet pipe 2 and the material outlet pipe 3.

[0064] Preferably, the inner wall of the elastic spiral tube 7 is provided with a heat insulation layer to reduce heat loss after material heat exchange.

[0065] Sealing rings are provided at the connection points between the medium inlet pipe 5 and the medium outlet pipe 6 and the heat exchanger shell 1 to improve the sealing performance between the medium inlet pipe 5 and the medium outlet pipe 6 and the heat exchanger shell 1.

[0066] Both threaded rods 13 are rotatably connected to the heat exchanger housing 1 via sealed bearings, which improves the sealing performance between the threaded rods 13 and the heat exchanger housing 1.

[0067] In use, push the crown gear 17 to mesh with the spur gear 14, then rotate the crown gear 17. The crown gear 17 drives the two spur gears 14 to rotate, which in turn drives the two threaded rods 13 to rotate. The two threaded rods 13 drive the corresponding push plates 9 to move, so that the two push plates 9 push the corresponding push rods 10 to be horizontal, which can push the two slide plates 8 to both sides, so that the two ends of the elastic spiral tube 7 move out of the heat exchange shell by a certain length. This can adjust the time for the material to pass through the heat exchange shell 4, which can meet the heat exchange requirements of different materials. After adjustment, release the crown gear 17. The spring 20 pushes the second movable ring 18 to move away from the rotating ring 15, which drives the first movable ring 16 to move closer to the rotating ring 15, so that the crown gear 17 is separated from the two spur gears 14. This can effectively prevent the crown gear 17 from accidentally driving the spur gears 14 to rotate.

[0068] By pushing the crown gear into meshing with the spur gear, and then rotating the crown gear, the crown gear drives the two spur gears to rotate, which in turn drives the two threaded rods to rotate. The two threaded rods drive the corresponding push plates to move, so that the two push plates push the corresponding push rods to be horizontal, which can push the two slide plates to the sides, so that the two ends of the elastic spiral tube move out of the heat exchange shell by a certain length. This allows the time for the material to pass through the heat exchange shell to be adjusted, which can meet the heat exchange requirements of different materials.

[0069] After the crown gear is released, the spring force pushes the second movable ring to move away from the rotating ring, which in turn drives the first movable ring to move closer to the rotating ring. This separates the crown gear from the two spur gears, effectively preventing the crown gear from accidentally rotating the spur gear.

[0070] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A shell-and-tube heat exchanger, characterized in that, It includes an adjusting component, a heat exchanger shell (1), a material inlet pipe (2) and a material outlet pipe (3) fixed at both ends of the length direction of the heat exchanger shell (1), a heat exchange shell (4) with an annular cross section fixed inside the heat exchanger shell (1), a medium inlet pipe (5) and a medium outlet pipe (6) fixed at both ends of the heat exchange shell (4), an elastic spiral tube (7) with a variable length, a sliding plate (8) fixed at both ends of the elastic spiral tube (7) respectively, and two bellows (21) located at both ends of the elastic spiral tube (7). One of the corrugated pipes (21) connects the material inlet pipe (2) and the flexible spiral pipe (7), and the other corrugated pipe (21) connects the flexible spiral pipe (7) and the material outlet pipe (3). The elastic spiral tube (7) passes through the through hole inside the heat exchange shell (4). The adjusting component changes the distance between the two slide plates (8), so that the length of the elastic spiral tube (7) moving axially out of the heat exchange shell (4) can be adjusted.

2. A shell-and-tube heat exchanger according to claim 1, characterized in that, The ends of the medium inlet pipe (5) and the medium outlet pipe (6) away from the heat exchange shell (4) extend to the outside of the heat exchanger shell (1); the length direction of the medium inlet pipe (5) and the medium outlet pipe (6) is arranged radially along the heat exchange shell (4). The adjustment component includes two threaded rods (13) evenly distributed on the outer wall of the heat exchanger shell (1), two push plates (9) respectively movably sleeved on the corresponding medium inlet pipe (5) and medium outlet pipe (6), a pushing mechanism, and a transmission structure set on the outer wall of the heat exchanger shell (1); the threaded rods (13) are rotatably connected to the outer wall of the heat exchanger shell (1). One end of each push plate (9) is threadedly connected to the threaded rod (13) located on the same side of the heat exchange shell (4). The transmission mechanism drives the threaded rod (13) to rotate, causing the corresponding push plates (9) located on both radial sides of the heat exchange shell (4) to move closer to or further away from the heat exchange shell (4). Two push plates (9) are built into the heat exchanger shell (1) and located outside the heat exchanger shell (4). The push plates (9) are arranged perpendicular to the slide plate (8). The pushing mechanism converts the linear motion of the two push plates (9) in the radial direction of the heat exchange shell (4) into the linear motion of the two slide plates (8) in the longitudinal direction of the heat exchange shell (4).

3. A shell-and-tube heat exchanger according to claim 2, characterized in that, The pushing mechanism includes four push rods (10), and the two ends of each slide (8) are connected to two push plates (9) respectively through the inclined push rods (10). Each push rod (10) is hinged to the slide (8) and push plate (9) corresponding to the position. The two adjacent push rods (10) are arranged symmetrically, with the axis of symmetry being the center line of the two push plates (9) or the center line of the two slide plates (8).

4. A shell-and-tube heat exchanger according to claim 3, characterized in that, Both ends of the slide plate (8) and both ends of the push plate (9) are fixedly provided with connecting blocks (11). The connecting blocks (11) are rotatably provided with shaft pins (12). Both ends of the push rod (10) are rotatably connected to the corresponding shaft pins (12).

5. A shell-and-tube heat exchanger according to claim 2, characterized in that, The transmission mechanism includes two spur gears (14) and a crown gear (17) meshing with the spur gears (14). The two spur gears (14) are fixed and coaxially sleeved on the corresponding threaded rods (13) located at one end of the heat exchanger shell (1). The heat exchanger shell (1) is cylindrical, and the crown gear (17) is coaxially sleeved on the outside of the heat exchanger shell (1); The crown gear (17) can rotate relative to the heat exchanger housing (1), causing the crown gear (17) to rotate and drive the two threaded rods (13) to rotate.

6. A shell-and-tube heat exchanger according to claim 5, characterized in that, The transmission mechanism also includes a first movable ring (16) and a second movable ring (18) coaxial with the rotating ring (15), and multiple slide rods (19) passing through both ends of the rotating ring (15). The rotating ring (15) is disposed between the first movable ring (16) and the second movable ring (18); The crown gear (17) is fixedly disposed on the side of the first movable ring (16) near the spur gear (14), and the two ends of the slide rod (19) are fixedly connected to the corresponding first movable ring (16) and second movable ring (18) respectively. Each slide bar (19) has a spring (20) movably sleeved on its wall. The two ends of the spring (20) are fixedly connected to the rotating ring (15) and the second movable ring (18) respectively. When the second movable ring (18) is pressed, the first movable ring (16) drives the crown gear (17) to approach the spur gear (14).

7. A shell-and-tube heat exchanger according to claim 6, characterized in that, The outer wall of the rotating ring (15) is provided with anti-slip texture.

8. A shell-and-tube heat exchanger according to claim 1, characterized in that, Both the material inlet pipe (2) and the material outlet pipe (3) are fixedly equipped with connecting flanges at their outer ends.

9. A shell-and-tube heat exchanger according to claim 1, characterized in that, The inner wall of the elastic spiral tube (7) is provided with a heat insulation layer.

10. A shell-and-tube heat exchanger according to claim 1, characterized in that, Both threaded rods (13) are rotatably connected to the heat exchanger housing (1) via sealed bearings.

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