A rotating shaft device for a heat exchanger and a heat exchanger

Abstract

The utility model belongs to heat exchanger technical field discloses a kind of rotating shaft device and heat exchanger, rotating shaft device includes first flange, second flange, rotating shaft, sleeve, first connecting plate, second connecting plate, third connecting plate and supporting plate, and heat exchanger includes head, cylinder and rotating shaft device. By adjusting nut, the distance between supporting plate and third connecting plate is shortened, so that the distance between first connecting plate and second connecting plate is elongated, so that the distance between first flange and second flange is generated and separated, with the axis of rotating shaft as the rotation center, rotating first flange, moving away first flange, so as to realize the separation of first flange and second flange. Through the separation of first flange and second flange, the separation of head and cylinder is driven, so that the separation of head and cylinder is more convenient, and the disassembly and assembly efficiency of head and cylinder is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a rotating shaft device for a heat exchanger and a heat exchanger. Background Technology

[0002] A heat exchanger is a device that enables heat transfer between fluids at different temperatures. It is widely used in chemical, petroleum, power, food, and refrigeration industries. Its core function is to transfer heat from a high-temperature fluid to a low-temperature fluid through a heat transfer surface (such as a pipe wall or plate) to meet process requirements (such as heating, cooling, condensation, and evaporation).

[0003] Heat exchangers are widely used in the chemical industry for heat exchange between hot and cold fluids. However, a major drawback of most heat exchangers today is their long maintenance cycles. This is because the head and shell are mostly connected by bolts and nuts. Due to the high sealing requirements of heat exchangers, a large number of bolts and nuts are needed to secure the head and shell to ensure the heat exchanger's airtightness. Because the head is too large, after the bolts are completely removed, a pry bar or jack is needed to pry the head and shell to separate them. This process is time-consuming and laborious, resulting in excessively long disassembly times and consequently low efficiency in the internal maintenance of the heat exchanger.

[0004] Therefore, there is an urgent need to propose a rotating shaft device and a heat exchanger for heat exchangers to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a rotating shaft device to solve the problem of time-consuming and laborious process of prying the end cap, and to improve the efficiency of disassembly and assembly of the heat exchanger end cap and cylinder.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A rotating shaft device for removing the head and shell of a heat exchanger, the rotating shaft device comprising:

[0008] The first flange and the second flange are detachably connected. The first flange is fixedly connected to the end cap, and the second flange is fixedly connected to the cylinder.

[0009] A rotating shaft and a sleeve, with the sleeve rotatably mounted on the rotating shaft;

[0010] The first connecting plate has a rotating shaft fixedly inserted through one end, and the other end of the first connecting plate is connected to the first flange.

[0011] The second connecting plate has a sleeve fixedly inserted through one end, and the other end of the second connecting plate is fixedly connected to the second flange.

[0012] The third connecting plate has a sleeve fixedly inserted through one end of it, and the third connecting plate is spaced apart from the second connecting plate.

[0013] The support plate, along the axial direction of the rotation shaft, is located on the side of the third connecting plate away from the second connecting plate, and the surface of the support plate facing the third connecting plate abuts against the end face of the rotation shaft away from the first connecting plate.

[0014] The adjusting assembly includes bolts and nuts, and the distance between the support plate and the third connecting plate can be adjusted by the bolts and nuts.

[0015] Preferably, the rotating shaft has a cavity inside, and the cavity is coaxially arranged with the rotating shaft.

[0016] Preferably, the rotating shaft device also includes a connecting rod, a connecting ring is provided along the circumference of the connecting rod, the side of one end of the connecting rod is fixedly connected to the inner wall of the cavity, the end face of the other end of the connecting rod is rotatably connected to the support plate, and the connecting ring is fixedly connected to the outer wall of the cavity.

[0017] Preferably, the rotating shaft device further includes a first elastic pad, which is coaxially arranged with the rotating shaft and sandwiched between the end face of the other end of the connecting rod and the support plate along the axial direction of the rotating shaft.

[0018] Preferably, the tray has a raised structure, which is arranged circumferentially along the tray and extends in the direction of the tray toward the rotation axis. When the rotation axis is placed on the tray, the raised structure can surround the outer periphery of the rotation axis.

[0019] Another objective of this invention is to provide a heat exchanger that solves the problem of time-consuming and laborious processes in prying the end cap, thereby improving the efficiency of disassembly and assembly of the end cap and the cylinder.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] A heat exchanger includes a head, a cylinder, and the aforementioned rotating shaft assembly. The head is fixedly connected to a first flange, and the cylinder is fixedly connected to a second flange.

[0022] Preferably, one end of the third connecting plate is fixedly connected to the sleeve, and the other end of the third connecting plate is fixedly connected to the outer wall of the cylinder. The width of the third connecting plate gradually increases from the sleeve to the cylinder.

[0023] Preferably, the heat exchanger also includes two fourth connecting plates, one end of which is fixedly connected to the sleeve, and the other ends of which are spaced apart and fixedly connected to the outer wall of the cylinder, and the sides of which are fixedly connected to the upper surface of the third connecting plate.

[0024] Preferably, the heat exchanger also includes a fifth connecting plate, one end of which is fixedly connected to the end face of the other end of the rotating shaft, and the other end of which is fixedly connected to the end cap.

[0025] Preferably, the heat exchanger also includes two sixth connecting plates, one end of which is fixedly connected to the rotating shaft, and the other ends of which are spaced apart and fixedly connected to the end caps. The sides of the two sixth connecting plates are fixedly connected to the lower surface of the fifth connecting plate, respectively.

[0026] The beneficial effects of this utility model are:

[0027] This utility model provides a rotating shaft device for removing the end caps and shell of a heat exchanger. The rotating shaft device includes: a first flange, a second flange, a rotating shaft, a sleeve, a first connecting plate, a second connecting plate, a third connecting plate, and a support plate. The first flange and the second flange are detachably connected. The first flange is fixedly connected to the end cap, and the second flange is fixedly connected to the shell. The sleeve is rotatably mounted on the rotating shaft. The rotating shaft is fixedly inserted through one end of the first connecting plate, and the other end of the first connecting plate is connected to the first flange. The sleeve is fixedly inserted through one end of the second connecting plate, and the other end of the second connecting plate is fixedly connected to the second flange. The sleeve is fixedly inserted through one end of the third connecting plate, and the third connecting plate is spaced apart from the second connecting plate. Along the axial direction of the rotating shaft, the support plate is located on the side of the third connecting plate opposite to the second connecting plate. The surface of the support plate facing the third connecting plate abuts against the end face of the rotating shaft opposite to the first connecting plate. The distance between the support plate and the third connecting plate can be adjusted by bolts and nuts. By tightening the nut, the distance between the support plate and the third connecting plate is shortened, while the distance between the first connecting plate and the second connecting plate is lengthened. This creates a distance between the first flange and the second flange, causing them to separate. With the axis of the rotating shaft as the center of rotation, the first flange is rotated, moving it away and thus separating the first flange from the second flange. This, in turn, separates the end cap from the cylinder, making the separation of the end cap from the cylinder more convenient and improving the efficiency of disassembly and assembly of the end cap and the cylinder.

[0028] This utility model also provides a heat exchanger, including a head, a cylinder and a rotating shaft device. The head is fixedly connected to a first flange and the cylinder is fixedly connected to a second flange. By separating the first flange and the second flange, the head and the cylinder are separated, making the separation of the head and the cylinder more convenient and thus improving the efficiency of disassembly and assembly of the head and the cylinder. Attached Figure Description

[0029] Figure 1 This is a front view of the heat exchanger provided in this embodiment;

[0030] Figure 2 This is a left view of the heat exchanger provided in this embodiment;

[0031] Figure 3 This is a top view of the heat exchanger provided in this embodiment;

[0032] Figure 4 yes Figure 1 A cross-sectional view along the AA direction;

[0033] Figure 5 yes Figure 2 Enlarged view of B in the middle;

[0034] Figure 6 This is a schematic diagram of the pallet structure provided in this embodiment;

[0035] Figure 7 This is a schematic diagram of the first connecting plate structure provided in this embodiment;

[0036] Figure 8 yes Figure 7 A cross-sectional view along the CC direction;

[0037] Figure 9 This is a schematic diagram of the second connecting plate structure provided in this embodiment;

[0038] Figure 10 yes Figure 9 A cross-sectional view along the DD direction;

[0039] Figure 11 This is a schematic diagram of the structure of the sixth connecting plate provided in this embodiment;

[0040] Figure 12 This is a schematic diagram of the seventh connecting plate structure provided in this embodiment;

[0041] Figure 13 yes Figure 12 A cross-sectional view along the EE direction.

[0042] In the picture:

[0043] 10. End cap; 20. Shell; 31. First flange; 32. Second flange; 41. Rotating shaft; 411. Cavity; 42. Sleeve; 51. First connecting plate; 52. Second connecting plate; 53. Third connecting plate; 54. Fourth connecting plate; 55. Fifth connecting plate; 56. Sixth connecting plate; 57. Seventh connecting plate; 61. Support plate; 62. Protruding structure; 71. Bolt; 72. Nut; 73. Second elastic pad; 74. Washer; 75. Connecting rod; 76. Connecting ring; 77. First elastic pad; 78. Gasket. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] This embodiment provides a rotating shaft device to solve the problem of time-consuming and laborious process of prying the end cap, and improve the efficiency of disassembly and assembly of the heat exchanger end cap and shell.

[0049] Specifically, such as Figures 1 to 5As shown, a rotating shaft device is used to remove the end cap 10 and the shell 20 of a heat exchanger. The rotating shaft device includes: a first flange 31, a second flange 32, a rotating shaft 41, a sleeve 42, a first connecting plate 51, a second connecting plate 52, a third connecting plate 53, a support plate 61, and an adjusting assembly. The first flange 31 and the second flange 32 are detachably connected. The first flange 31 is fixedly connected to the end cap 10, and the second flange 32 is fixedly connected to the shell 20. The sleeve 42 is rotatably sleeved on the rotating shaft 41. The rotating shaft 41 is fixedly inserted through one end of the first connecting plate 51, and the other end of the first connecting plate 51 is connected to the first flange 31. The cylinder 42 is fixedly inserted through one end of the second connecting plate 52, and the other end of the second connecting plate 52 is fixedly connected to the second flange 32; the sleeve 42 is fixedly inserted through one end of the third connecting plate 53, and the third connecting plate 53 and the second connecting plate 52 are spaced apart; along the axial direction of the rotating shaft 41, the support plate 61 is located on the side of the third connecting plate 53 away from the second connecting plate 52, and the surface of the support plate 61 facing the third connecting plate 53 abuts against the end face of the rotating shaft 41 away from the first connecting plate 51; the adjusting assembly includes a bolt 71 and a nut 72, and the distance between the support plate 61 and the third connecting plate 53 can be adjusted by the bolt 71 and the nut 72. By tightening the nut 72, the distance between the support plate 61 and the third connecting plate 53 is shortened, and the distance between the first connecting plate 51 and the second connecting plate 52 is lengthened. This creates a distance between the first flange 31 and the second flange 32, causing them to separate. With the axis of the rotating shaft 41 as the center of rotation, the first flange 31 is rotated and moved away, thereby separating the first flange 31 from the second flange 32. This further facilitates the separation of the end cap 10 from the cylinder 20, improving the efficiency of disassembly and assembly of the end cap 10 and the cylinder 20. When it is necessary to connect the end cap 10 and the cylinder 20, the first flange 31 is rotated around the axis of the rotating shaft 41 to align the first flange 31 with the second flange 32. The nut 72 is then loosened, extending the distance between the third connecting plate 53 and the support plate 61. The first connecting plate 51 moves axially along the rotating shaft 41 toward the second connecting plate 52, thereby achieving alignment and contact between the first flange 31 and the second flange 32, and thus connecting the end cap 10 and the cylinder 20. In other embodiments, the distance between the support plate 61 and the third connecting plate 53 can also be adjusted by a telescopic rod. It should be noted that all fixed connections described in this embodiment are welded.

[0050] like Figures 6 to 10As shown, the pallet 61 is elliptical in shape to reduce impact stress during the rotation of the rotating shaft 41 and extend its service life. The end of the first connecting plate 51 connected to the first flange 31 is arc-shaped to facilitate welding between the two and improve connection stability. Similarly, the end of the second connecting plate 52 connected to the second flange 32 is arc-shaped to facilitate welding between the two and improve connection stability.

[0051] Furthermore, such as Figures 1 to 4 As shown, the bolt 71 is rotatably inserted through the support plate 61 and the third connecting plate 53 and threadedly connected to the nut 72. A second elastic pad 73 and a washer 74 are sandwiched between the nut 72 and the third connecting plate 53 to adjust the position of the nut 72 on the bolt 71. The elastic deformation of the second elastic pad 73 in its axial direction makes the adjustment process more convenient.

[0052] Optionally, the rotating shaft 41 has a cavity 411 inside, and the cavity 411 is coaxially arranged with the rotating shaft 41. The rotating shaft 41 is set as a hollow shaft, which reduces the weight of the rotating shaft 41, making it more convenient for the pallet 61 to lift the rotating shaft 41, and also reduces the manufacturing cost of the rotating shaft 41.

[0053] Furthermore, such as Figure 5 As shown, the rotating shaft device also includes a connecting rod 75, with a connecting ring 76 arranged circumferentially along the connecting rod 75. One end of the connecting rod 75 is fixedly connected to the inner wall of the cavity 411, and the other end is rotatably connected to the support plate 61. The connecting ring 76 is fixedly connected to the outer wall of the cavity 411. The connecting rod 75 supports the cavity 411, preventing the cavity wall from recessing into the cavity 411, which would cause a change in the shaft diameter of the rotating shaft 41, resulting in its inability to rotate. The connecting ring 76, fixed to the outer wall of the connecting rod 75, is sandwiched between the rotating shaft 41 and the support plate 61, preventing wear caused by direct rotational contact between the rotating shaft 41 and the support plate 61, thereby improving the service life of the rotating shaft 41.

[0054] Optionally, the rotating shaft device further includes a first elastic pad 77, which is coaxially arranged with the rotating shaft 41. Along the axial direction of the rotating shaft 41, the first elastic pad 77 is sandwiched between the end face of the other end of the connecting rod 75 and the support plate 61, preventing the end face of the other end of the connecting rod 75 from contacting the support plate 61, improving the wear resistance of the support plate 61, and thus increasing the service life of the support plate 61. In addition, the elastic deformation of the first elastic pad 77 along its axial direction makes it easier to deform during the process of adjusting the distance between the support plate 61 and the third connecting plate 53 using bolts 71 and nuts 72, making the adjustment process more convenient.

[0055] Furthermore, the rotating shaft device also includes a pad 78, which is sandwiched between the connecting rod 75 and the first elastic pad 77. The pad 78 is directly welded and fixed to the end face of the connecting rod 75, and the pad 78 is in direct contact with the first elastic pad 77, which further avoids wear between the connecting rod 75 and the first elastic pad 77 and improves the service life of the connecting rod 75.

[0056] Optionally, the pallet 61 is provided with a protruding structure 62. The protruding structure 62 is arranged circumferentially along the rotation shaft 41 and extends along the pallet 61 toward the rotation shaft 41. When the rotation shaft 41 is placed on the pallet 61, the protruding structure 62 can surround the outer periphery of the rotation shaft 41 and limit the rotation shaft 41 radially, preventing the rotation shaft 41 from moving radially during rotation, which would cause the first flange 31 and the second flange 32 to misalign during connection. In this embodiment, the protruding structure 62 extends circumferentially along the rotation shaft 41 and is connected end to end in a ring shape. In other embodiments, the protruding structure 62 includes multiple protrusions, which are evenly distributed circumferentially along the rotation shaft 41. It should be noted that, in this embodiment, the rotating shaft 41 is rotatably connected to the support plate 61 via the connecting rod 75, the pad 78 and the first elastic pad 77 in sequence. Therefore, the protruding structure 62 surrounds the circumference of the first elastic pad 77. When the rotating shaft 41 is in direct contact with the support plate 61, the protruding structure 62 surrounds the outer circumference of the rotating shaft 41.

[0057] This embodiment also provides a heat exchanger that solves the problem of time-consuming and laborious process of prying the end cap, and improves the efficiency of disassembly and assembly of the end cap 10 and the cylinder 20.

[0058] Specifically, such as Figures 1 to 5 As shown, a heat exchanger includes a head 10, a cylinder 20, and the aforementioned rotating shaft device. The head 10 is fixedly connected to a first flange 31, and the cylinder 20 is fixedly connected to a second flange 32. By separating the first flange 31 and the second flange 32, the head 10 and the cylinder 20 are separated, making the separation of the head 10 and the cylinder 20 more convenient and thus improving the efficiency of disassembly and assembly of the head 10 and the cylinder 20.

[0059] Furthermore, one end of the third connecting plate 53 is fixedly connected to the sleeve 42, and the other end of the third connecting plate 53 is fixedly connected to the outer wall of the cylinder 20. From the sleeve 42 towards the cylinder 20, the width of the third connecting plate 53 gradually increases, making the connection between the cylinder 20 and the sleeve 42 more stable. This prevents the cylinder 20 from rotating relative to the second flange 32, thus avoiding the inability to complete the rotational movement of the end cap 10. In this embodiment, the third connecting plate 53 is trapezoidal in shape; in other embodiments, the third connecting plate 53 is arc-shaped.

[0060] Furthermore, the heat exchanger also includes two fourth connecting plates 54. One end of each fourth connecting plate 54 is fixedly connected to the sleeve 42, and the other ends of the two fourth connecting plates 54 are spaced apart and fixedly connected to the outer wall of the cylinder 20, respectively. The sides of the two fourth connecting plates 54 are welded and fixed to the upper surface of the third connecting plate 53, respectively. The fourth connecting plates 54 and the third connecting plate 53 work together to further improve the connection stability between the cylinder 20 and the sleeve 42. In this embodiment, the fourth connecting plate 54 is vertically fixed to the third connecting plate 53. In other embodiments, the fourth connecting plate 54 and the third connecting plate 53 are fixed at an angle. In other embodiments, one of the two fourth connecting plates 54 is welded and fixed to the third connecting plate 53, or neither of the two fourth connecting plates 54 is welded and fixed to the third connecting plate 53.

[0061] Optionally, the heat exchanger also includes a fifth connecting plate 55. One end of the fifth connecting plate 55 is fixedly connected to the end face of the other end of the rotating shaft 41, and the other end of the fifth connecting plate 55 is fixedly connected to the end cap 10. By adding the fifth connecting plate 55, a stable connection between the end cap 10 and the rotating shaft 41 is achieved, and the radial stiffness of the end face of the other end of the rotating shaft 41 is improved, preventing the rotating shaft 41 from being recessed inward, which would cause the shaft diameter of the rotating shaft 41 to change and prevent it from rotating.

[0062] Furthermore, the heat exchanger also includes a seventh connecting plate 57, with the rotating shaft 41 fixedly inserted through one end of the seventh connecting plate 57, and the other end of the seventh connecting plate 57 fixedly connected to the end cap 10. The seventh connecting plate 57 and the fifth connecting plate 55 work together to further improve the stability of the connection between the end cap 10 and the rotating shaft 41.

[0063] Optionally, the heat exchanger also includes two sixth connecting plates 56. One end of each of the two sixth connecting plates 56 is fixedly connected to the rotating shaft 41, and the other ends of the two sixth connecting plates 56 are spaced apart and fixedly connected to the end cap 10. The two opposite sides of the two sixth connecting plates 56 are welded and fixed to the fifth connecting plate 55 and the seventh connecting plate 57, respectively. The two sixth connecting plates 56 are fixed to the end cap 10 at an included angle, making the connection between the rotating shaft 41 and the end cap 10 more stable, thereby preventing the end cap 10 from being unable to rotate due to relative rotation between it and the first flange 31. Figure 11 As shown, the end of the sixth connecting plate 56 that connects to the end cap 10 is designed in an arc shape, making the welding process between the sixth connecting plate 56 and the end cap 10 easier. Figures 12 to 13As shown, the end of the seventh connecting plate 57 connected to the end cap 10 has a certain curvature to facilitate welding between the seventh connecting plate 57 and the end cap 10. In this embodiment, the sixth connecting plate 56 is vertically fixed between the fifth connecting plate 55 and the seventh connecting plate 57. In other embodiments, the sixth connecting plate 56 is welded to the fifth connecting plate 55 and the seventh connecting plate 57 at an angle. In other embodiments, one of the two sixth connecting plates 56 is welded to either the fifth connecting plate 55 or the seventh connecting plate 57; or, neither of the two sixth connecting plates 56 is welded to either the fifth connecting plate 55 or the seventh connecting plate 57; or, one of the two sixth connecting plates 56 is welded to the fifth connecting plate 55, and the other is welded to the seventh connecting plate 57.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotating shaft device characterized by comprising: The rotating shaft device is used to remove the heat exchanger's end caps (10) and shell (20), and the rotating shaft device includes: A first flange (31) and a second flange (32) are detachably connected. The first flange (31) is fixedly connected to the end cap (10), and the second flange (32) is fixedly connected to the cylinder (20). A rotating shaft (41) and a sleeve (42), wherein the sleeve (42) is rotatably mounted on the rotating shaft (41); The first connecting plate (51) has the rotating shaft (41) fixedly inserted through one end of the first connecting plate (51), and the other end of the first connecting plate (51) is connected to the first flange (31). The second connecting plate (52) has a sleeve (42) fixedly inserted through one end of the second connecting plate (52), and the other end of the second connecting plate (52) is fixedly connected to the second flange (32); The third connecting plate (53) is provided with the sleeve (42) fixedly inserted through one end of the third connecting plate (53), and the third connecting plate (53) and the second connecting plate (52) are spaced apart. The support plate (61) is located along the axial direction of the rotating shaft (41) on the side of the third connecting plate (53) away from the second connecting plate (52), and the side surface of the support plate (61) facing the third connecting plate (53) abuts against the end face of the rotating shaft (41) away from the first connecting plate (51). An adjustment assembly, comprising a bolt (71) and a nut (72), wherein the distance between the support plate (61) and the third connecting plate (53) is adjustable by means of the bolt (71) and the nut (72).

2. The rotational shaft device according to claim 1, characterized by The rotating shaft (41) has a cavity (411) inside, and the cavity (411) is coaxially arranged with the rotating shaft (41).

3. The rotational shaft device according to claim 2, characterized by The rotating shaft device also includes a connecting rod (75), and a connecting ring (76) is provided along the circumference of the connecting rod (75). The side of one end of the connecting rod (75) is fixedly connected to the inner wall of the cavity (411), the end face of the other end of the connecting rod (75) is rotatably connected to the support plate (61), and the connecting ring (76) is fixedly connected to the outer wall of the cavity (411).

4. The rotational shaft device according to claim 3, characterized by The rotating shaft device further includes a first elastic pad (77), which is coaxially arranged with the rotating shaft (41). Along the axial direction of the rotating shaft (41), the first elastic pad (77) is sandwiched between the end face of the other end of the connecting rod (75) and the support plate (61).

5. The rotating shaft device according to any one of claims 1-4, characterized in that, The tray (61) is provided with a protruding structure (62), which is arranged circumferentially along the tray (61) and extends along the tray (61) toward the rotating shaft (41). When the rotating shaft (41) is placed on the tray (61), the protruding structure (62) can surround the outer periphery of the rotating shaft (41).

6. A heat exchanger, characterized by It includes a head (10), a cylinder (20) and a rotating shaft device as described in any one of claims 1-5, wherein the head (10) is fixedly connected to the first flange (31) and the cylinder (20) is fixedly connected to the second flange (32).

7. The heat exchanger of claim 6, wherein One end of the third connecting plate (53) is fixedly connected to the sleeve (42), and the other end of the third connecting plate (53) is fixedly connected to the outer wall of the cylinder (20). The width of the third connecting plate (53) gradually increases from the sleeve (42) to the cylinder (20).

8. The heat exchanger of claim 7, wherein The heat exchanger also includes two fourth connecting plates (54), one end of each of the two fourth connecting plates (54) is fixedly connected to the sleeve (42), the other ends of the two fourth connecting plates (54) are spaced apart and fixedly connected to the outer wall of the cylinder (20), and the sides of the two fourth connecting plates (54) are fixedly connected to the upper surface of the third connecting plate (53).

9. The heat exchanger of claim 6, wherein The heat exchanger also includes a fifth connecting plate (55), one end of which is fixedly connected to the end face of the other end of the rotating shaft (41), and the other end of which is fixedly connected to the end cap (10).

10. The heat exchanger of claim 9, wherein The heat exchanger also includes two sixth connecting plates (56), one end of each of the two sixth connecting plates (56) is fixedly connected to the rotating shaft (41), the other ends of the two sixth connecting plates (56) are spaced apart and fixedly connected to the end cap (10), and the sides of the two sixth connecting plates (56) are fixedly connected to the lower surface of the fifth connecting plate (55) respectively.

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