Tube sheet heat exchanger

Abstract

The present invention provides a tube sheet heat exchanger, comprising two tube sheets, a plurality of heat exchange tubes, two tube boxes, two first connecting pieces, a plurality of strip cutting pieces and a driving device. The two first connecting pieces are respectively arranged in the two tube boxes. The plurality of strip cutting pieces are correspondingly arranged in the heat exchange tube, and the two ends of each strip cutting piece are respectively connected to the corresponding first connecting piece after passing through the first hole. The driving device is used to drive the two first connecting pieces to move in a circular arc trajectory. The present invention drives the first connecting piece to move in a circular arc trajectory through the driving device, driving the plurality of strip cutting pieces to move synchronously, and the strip cutting pieces move along the inner wall of the heat exchange tube, thereby separating the dirt layer attached to the inner wall of the heat exchange tube from the inner wall of the heat exchange tube, and the separated dirt layer flows out of the heat exchange tube to the tube box with the fluid and is discharged. The cleaning of the inner wall of the heat exchange tube can be completed under normal operation when the machine is turned on, thereby ensuring the heat exchange effect of the tube sheet heat exchanger to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and in particular to a tube sheet heat exchanger. Background Art

[0002] Tube-sheet heat exchangers are widely used in the chemical industry. Fluids with different temperatures flow through the tube side and shell side of the tube-sheet heat exchanger, and heat exchange is completed through heat exchange.

[0003] The two ends of the cylindrical shell in the middle of the tube-sheet heat exchanger are connected to tube sheets respectively. A large number of through holes are opened on the tube sheets. Heat exchange tubes are arranged between the two tube sheets. The two ends of the heat exchange tubes are connected to corresponding through holes respectively. The outer sides of the two tube sheets are connected to pipe boxes respectively. The fluid flows into the heat exchange tubes through the pipe box and the tube sheet and then flows out from the tube sheet and the tube box on the other side.

[0004] In practice, when a tube-sheet heat exchanger is in long-term operation, impurities in the fluid tend to adhere to and deposit on the inner wall of the heat exchange tube, forming a fouling layer and reducing the heat exchange effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a tube sheet heat exchanger, which can solve or at least alleviate one or more of the above-mentioned problems and other problems in the prior art.

[0006] The present invention provides a tube sheet heat exchanger, comprising:

[0007] Two tube sheets are symmetrically arranged, and a plurality of first holes are opened on the tube sheets;

[0008] A plurality of heat exchange tubes are arranged in parallel between the two tube sheets, and both ends of the heat exchange tubes are respectively connected to the corresponding first holes on the two tube sheets;

[0009] Two tube boxes are respectively connected to the two tube sheets;

[0010] Two first connecting members are respectively arranged in the two pipe boxes;

[0011] A plurality of strip-shaped cutting members are correspondingly arranged in the heat exchange tube, and two ends of each of the strip-shaped cutting members are rotatably connected to the corresponding first connecting member after passing through the first hole; and

[0012] The driving device is used to drive the two first connecting members to move in a circular arc trajectory, so as to drive the strip-shaped cutting member to move along the inner wall of the corresponding heat exchange tube in the heat exchange tube.

[0013] Preferably, the driving device comprises a driving mechanism disposed in the tube box; more than two driving mechanisms are disposed in the tube box; the first connecting member is located between the tube sheet and the driving mechanism;

[0014] The driving mechanism comprises:

[0015] A mounting seat connected to the pipe box;

[0016] A rotating shaft, rotatably disposed on the mounting seat;

[0017] A power assembly, disposed on the mounting seat, and used to drive the rotating shaft to rotate;

[0018] a telescopic assembly connected to the rotating shaft and arranged along the radial direction of the rotating shaft; and

[0019] A second connecting member has one end connected to the telescopic assembly and the other end connected to the first connecting member.

[0020] Preferably, the mounting seat comprises a sealing shell, the sealing shell contains a sealed mounting cavity, and a second through hole is formed on a side wall of the sealing shell;

[0021] The power assembly comprises:

[0022] A first motor is slidably disposed in the mounting cavity, and an output end thereof passes through the second hole and is connected to the rotating shaft;

[0023] A third connecting member, connected to the motor, and having a third hole formed thereon;

[0024] a screw rod, one end of which is inserted into the third hole, the screw rod being threadedly connected to the third hole; and

[0025] The second motor is arranged in the installation cavity, and the output end of the second motor is connected to the end of the screw rod away from the third connecting member.

[0026] Preferably, the driving device further comprises a plurality of annular members; the annular members are arranged in one-to-one correspondence with the sealing shell; the annular members are connected to the sealing shell; the annular members surround the corresponding rotating shaft, and the inner rings of the plurality of annular members are all provided with annular guide grooves; the guide grooves are arranged at an inclined surface and face the corresponding first motor;

[0027] The telescopic assembly comprises:

[0028] An inner rod connected to the rotating shaft and extending along the axis of the rotating shaft;

[0029] An outer tube, one end of which is closed, is slidably sleeved on the inner rod, and the closed end of the outer tube abuts against the guide groove; and

[0030] a first spring, disposed in the outer tube, with one end connected to the closed end of the outer tube and the other end connected to the end of the inner rod;

[0031] The second connecting member is connected to the outer tube.

[0032] Preferably, a guide tube is connected to the outer tube, the axis of the guide tube is perpendicular to the axis of the outer tube, a second spring is arranged in the guide tube, the second connecting piece is slidably inserted into the guide tube, one end of the second spring is connected to the outer wall of the outer tube, and the other end of the second spring is connected to the second connecting piece.

[0033] Preferably, a plurality of cutting blades are connected to the strip-shaped cutting member.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the technology of the present invention, the first connecting member is driven by the driving device to move in a circular arc trajectory, driving multiple strip cutting members to move synchronously, and the strip cutting members move along the inner wall of the heat exchange tube, thereby separating the dirt layer attached to the inner wall of the heat exchange tube from the inner wall of the heat exchange tube, and the separated dirt layer flows out of the heat exchange tube to the tube box with the fluid and then discharged. The cleaning of the inner wall of the heat exchange tube can be completed under normal operation, thereby ensuring the heat exchange effect of the tube-sheet heat exchanger to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0037] Figure 1 A three-dimensional diagram of a tube sheet heat exchanger in one embodiment of the present invention (the tube box on the right is not shown);

[0038] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0039] Figure 3 for Figure 2 Schematic diagram of the coordination of the middle tube plate, heat exchange tubes, strip cutting parts and driving mechanism;

[0040] Figure 4 for Figure 3 Another schematic diagram of;

[0041] Figure 5 for Figure 4 The enlarged schematic diagram of S in the middle;

[0042] Figure 6 for Figure 4 Enlarged schematic diagram of the middle strip cutting piece.

[0043] Reference numerals:

[0044] 10. tube sheet; 11. first hole;

[0045] 20. Heat exchange tube;

[0046] 30. Pipe box;

[0047] 40. A first connecting member;

[0048] 50. Strip cutting pieces;

[0049] 60. driving mechanism; 61. mounting seat; 611. sealing shell; 612. mounting cavity; 613. second hole; 62. rotating shaft; 63. power assembly; 631. first motor; 632. third connecting member; 633. screw rod; 634. second motor; 64. telescopic assembly; 641. inner rod; 642. outer tube; 643. first spring; 65. second connecting member; 66. guide tube; 67. second spring;

[0050] 80. Cutting disc. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0052] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] See also Figures 1 to 6 The present embodiment provides a tube sheet heat exchanger, comprising two tube sheets 10, a plurality of heat exchange tubes 20, two tube boxes 30, two first connecting members 40, a plurality of strip-shaped cutting members 50 and a driving device. In addition, referring to the tube sheet 10 type heat exchanger in the prior art, a shell is further provided outside the plurality of mutually parallel heat exchange tubes 20, and the two ends of the shell are respectively connected to the two tube sheets 10.

[0058] The two tube sheets 10 are symmetrically arranged, and a plurality of first holes 11 are formed on the tube sheets 10. A plurality of heat exchange tubes 20 are arranged parallel to each other between the two tube sheets 10, and both ends of the heat exchange tubes 20 are connected to the corresponding first holes 11 on the two tube sheets 10, respectively.

[0059] The two tube boxes 30 are connected to the two tube sheets 10 respectively. The two first connecting members 40 are respectively arranged in the two tube boxes 30. A plurality of strip cutting members 50 are correspondingly arranged in the heat exchange tube 20, and the two ends of each strip cutting member 50 are connected to the corresponding first connecting member 40 after passing through the first hole 11. The driving device is used to drive the two first connecting members 40 to move in a circular trajectory, so as to drive the strip cutting members 50 to move along the inner wall of the heat exchange tube 20 in the corresponding heat exchange tube 20. The strip cutting members 50 move in a circular trajectory to separate the inner wall of the heat exchange tube 20 from the dirt layer attached to the inner wall of the heat exchange tube 20. Specifically, the strip cutting member 50 can be a steel wire coated with an anti-rust coating, or a carbon fiber wire, or a rod. The two first connecting members 40 play the role of connecting and supporting the strip cutting members 50, and can be a hollow design to reduce its own weight.

[0060] In this embodiment, the first connecting member 40 is driven by the driving device to move in a circular arc trajectory, driving the multiple strip cutting members 50 to move synchronously, and the strip cutting members 50 move along the inner wall of the heat exchange tube 20, so as to separate the dirt layer attached to the inner wall of the heat exchange tube 20 from the inner wall of the heat exchange tube 20, and the separated dirt layer flows out of the heat exchange tube 20 to the tube box 30 with the fluid and then discharged. The cleaning of the inner wall of the heat exchange tube 20 can be completed under normal operation, thereby ensuring the heat exchange effect of the tube sheet 10 type heat exchanger to a certain extent.

[0061] In one embodiment, the driving device includes a driving mechanism 60 disposed in the tube box 30. More than two driving mechanisms 60 are disposed in the tube box 30. The first connecting member 40 is located between the tube sheet 10 and the driving mechanism 60.

[0062] The driving mechanism 60 includes a mounting seat 61 , a rotating shaft 62 , a power assembly 63 , a telescopic assembly 64 and a second connecting member 65 .

[0063] The mounting seat 61 is connected to the pipe box 30. The rotating shaft 62 is rotatably arranged on the mounting seat 61. The power assembly 63 is arranged on the mounting seat 61, and the power assembly 63 is used to drive the rotating shaft 62 to rotate. The telescopic assembly 64 is connected to the rotating shaft 62, and the telescopic assembly 64 is arranged along the radial direction of the rotating shaft 62. The telescopic assembly 64 is telescopic. One end of the second connecting member 65 is connected to the telescopic assembly 64, and the other end of the second connecting member 65 is rotatably connected to the first connecting member 40. As the telescopic assembly 64 is extended and retracted, the second connecting member 65 can move away from or approach the axis of the rotating shaft 62. Specifically, a through hole can be provided on the first connecting member 40, and the second connecting member 65 is rod-shaped, and the second connecting member 65 intermittently cooperates with the through hole. In addition, a limit block can be provided at the end of the second connecting member 65 to prevent the first connecting member 40 from slipping off the second connecting member 65.

[0064] In this embodiment, the power assembly 63 drives the rotating shaft 62 to rotate, thereby driving the telescopic assembly 64 to rotate, and the second connecting member 65 connected to the telescopic assembly 64 also rotates accordingly, so that the first connecting member 40 connected to the second connecting member 65 moves in a circular arc trajectory.

[0065] Even if the dirt layer in the heat exchange tube 20 is cut off, it still sticks to the inner wall of the heat exchange tube 20, and it is not easy for the fluid to bring out the dirt layer when passing through the heat exchange tube 20. The extension and contraction of the telescopic assembly 64 can change the radius of the arc when the first connecting member 40 moves in an arc trajectory, so that when the strip cutting member 50 moves in an arc trajectory in the heat exchange tube 20, it can draw circles at different radial positions in the heat exchange tube 20, thereby cutting the dirt layer on the inner wall of the heat exchange tube 20 into multiple cylinders with different inner diameters, thereby facilitating the fluid to bring out the dirt layer in batches when passing through the heat exchange tube 20.

[0066] In addition, the extension and retraction of the telescopic component 64 can control the radius of the arc trajectory of the strip cutting member 50. When the moving radius of the arc trajectory at both ends of the strip cutting member 50 is the same, the dirt layer on the inner wall of the heat exchange tube 20 can be cut, and the dirt layer can be cut into multiple coaxial cylinders (the radius of the arc trajectory at both ends of the strip cutting member 50 is reduced synchronously).

[0067] When the moving radii of the arc trajectories at both ends of the strip cutting member 50 are different, the dirt layer can be beveled to cut the dirt layer into smaller blocks, which is beneficial for the dirt layer to be taken out when the fluid passes through the heat exchange tube 20, and also beneficial for the subsequent dirt layer to flow out from the outlet on the tube box 30.

[0068] In one embodiment, the mounting seat 61 includes a sealing shell 611 , the sealing shell 611 contains a sealed mounting cavity 612 , and a second hole 613 penetrating therethrough is formed on a side wall of the sealing shell 611 .

[0069] The power assembly 63 includes a first motor 631 , a third connecting member 632 , a screw rod 633 and a second motor 634 .

[0070] The first motor 631 is slidably disposed in the mounting cavity 612, and its output end is connected to the rotating shaft 62 after passing through the second hole 613. The output end of the first motor 631 is dynamically sealed with the second hole 613. The third connecting member 632 is connected to the motor, and a third hole is formed thereon. One end of the screw 633 is inserted into the third hole, and the screw 633 is threadedly connected to the third hole. The second motor 634 is disposed in the mounting cavity 612, and the output end of the second motor 634 is connected to one end of the screw 633 away from the third connecting member 632.

[0071] In this embodiment, the first motor 631 can drive the rotating shaft 62 to rotate, and at the same time, the second motor 634 can drive

[0072] The first motor 631 slides in the installation cavity 612, so that the rotating shaft 62 moves axially, and the two driving mechanisms 60 connected to the same strip cutting piece 50 in the two pipe boxes 30 can move in a horizontal direction at the same time, so as to achieve the effect of the strip cutting piece 50 moving along the length direction in the heat exchange tube 20. The strip cutting piece 50 can move back and forth along the length direction to imitate the cutting of a knife, so that the strip cutting piece 50 can move more easily in the radial direction of the heat exchange tube 20, so that the strip cutting piece 50 can be more easily located at different radial positions of the heat exchange tube 20. It is avoided that the two ends of the dirt layer on the inner wall of the heat exchange tube 20 form support for the strip cutting piece 50, resulting in the dirt layer in the middle of the heat exchange tube 20 cannot be effectively cut by the strip cutting piece 50. In addition, the strip cutting piece 50 can move back and forth to cut the dirt layer in the length direction, thereby breaking the dirt layer into smaller blocks, so that the dirt layer is more easily taken out by the fluid in the heat exchange tube 20.

[0073] In one embodiment, the driving device further comprises a plurality of annular members; the annular members are arranged in one-to-one correspondence with the sealing shell 611; the annular members are connected to the sealing shell 611; the annular members surround the corresponding rotating shaft 62, and the inner rings of the plurality of annular members are all provided with annular guide grooves; the ground of the guide grooves is inclined and faces the corresponding first motor 631,

[0074] The telescopic assembly 64 includes an inner rod 641 , an outer tube 642 and a first spring 643 .

[0075] The inner rod 641 is connected to the rotating shaft 62, and the inner rod 641 extends along the axis of the rotating shaft 62. One end of the outer tube 642 is closed, and the outer tube 642 is slidably sleeved on the inner rod 641. The closed end of the outer tube 642 is a ball end and abuts against the guide groove. The first spring 643 is arranged in the outer tube 642, one end of the first spring 643 is connected to the closed end of the outer tube 642, and the other end of the first spring 643 is connected to the end of the inner rod 641. The second connecting member 65 is connected to the outer tube 642. Specifically, the first spring 643 is a compression spring.

[0076] In this embodiment, the first motor 631 can move along the axial direction of the rotating shaft 62 under the drive of the second motor 634. Figure 4 and Figure 5 When the driving mechanisms 60 on both sides of the heat exchange tube 20 drive the first connecting member 40 to move to the left at the same time, the rotating shaft 62 moves to the left along the axial direction, and the outer tubes 642 in the driving mechanisms 60 on both sides move upward under the action of the first springs 643, thereby driving the second connecting member 65 to move upward, and then driving the first connecting member 40 to move upward, so that the strip cutting members 50 in all the heat exchange tubes 20 move upward, thereby increasing the radius of the circular arc movement trajectory of the strip cutting members 50. Similarly, when the driving mechanism 60 drives the first connecting member 40 to move right, it can drive all the strip cutting members 50 to move downward, thereby reducing the radius of the circular arc movement trajectory of the strip cutting members 50.

[0077] In one embodiment, a guide tube 66 is connected to the outer tube 642, the axis of the guide tube 66 is perpendicular to the axis of the outer tube 642, a second spring 67 is disposed in the guide tube 66, the second connector 65 is slidably inserted into the guide tube 66, one end of the second spring 67 is connected to the outer wall of the outer tube 642, and the other end of the second spring 67 is connected to the second connector 65. That is, the second connector 65 is connected to the outer tube 642 through the spring and the guide tube 66.

[0078] In this embodiment, the first motor 631 is driven by the second motor 634 to move horizontally, and the arc moving radius of the strip cutting member 50 can be changed through the telescopic component 64.

[0079] When only one of the first motors 631 in the pipe box 30 moves horizontally, that is, only one end of the arc track radius of the strip cutting member 50 changes, the strip cutting member 50 can be used to bevel the dirt layer in the heat exchange tube 20, thereby cutting the dirt layer into smaller pieces, which is convenient for taking out the fluid in the heat exchange tube 20. When only one of the first connecting members 40 in the pipe box 30 moves horizontally, the second spring 67 expands and contracts to cooperate.

[0080] In one embodiment, a plurality of cutting blades 80 are connected to the strip cutting member 50. When the cutting blades 80 rotate in the heat exchange tube 20 following the strip cutting member 50, the dirt layer can be cut and separated in the axial direction of the heat exchange tube 20. In addition, the cutting blades 80 and the strip cutting member 50 can approach or move away from the inner wall of the heat exchange tube 20 under the drive of the driving device, and can reciprocate along the axis of the heat exchange tube 20, so that the cutting blades 80 can push the dirt layer in the heat exchange tube 20 forward, which is conducive to the discharge of the dirt layer from the heat exchange tube 20. In addition, when the strip cutting member 50 bevels the dirt layer, the cutting blades 80 can further break up the dirt layer, which is conducive to the discharge of the dirt layer with the fluid.

[0081] In the specification of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A tube sheet heat exchanger, characterized in that: include: Two tube sheets (10) are symmetrically arranged, and a plurality of first holes (11) are formed through the tube sheets (10); A plurality of heat exchange tubes (20) are arranged in parallel between the two tube sheets (10), and two ends of the heat exchange tubes (20) are respectively connected to the corresponding first holes (11) on the two tube sheets (10); Two tube boxes (30) are respectively connected to the two tube sheets (10); Two first connecting members (40) are respectively arranged in the two pipe boxes (30); A plurality of strip-shaped cutting pieces (50) are correspondingly arranged in the heat exchange tube (20), and two ends of each of the strip-shaped cutting pieces (50) are connected to the corresponding first connecting piece (40) after passing through the first hole (11); as well as A driving device, used for driving the two first connecting members (40) to move in a circular arc trajectory, so as to drive the strip-shaped cutting member (50) to move inside the corresponding heat exchange tube (20) along the inner wall of the heat exchange tube (20); The driving device comprises a driving mechanism (60) arranged in the tube box (30); more than two driving mechanisms (60) are arranged in the tube box (30); the first connecting member (40) is located between the tube sheet (10) and the driving mechanism (60); The driving mechanism (60) comprises: A mounting seat (61) connected to the pipe box (30); A rotating shaft (62) rotatably disposed on the mounting seat (61); A power assembly (63) is disposed on the mounting seat (61) and is used to drive the rotating shaft (62) to rotate; a telescopic assembly (64), connected to the rotating shaft (62) and arranged along the radial direction of the rotating shaft (62); as well as A second connecting member (65) has one end connected to the telescopic assembly (64) and the other end rotatably connected to the first connecting member (40).

2. A tube sheet heat exchanger according to claim 1, characterized in that: The mounting seat (61) comprises a sealing shell (611), the sealing shell (611) contains a sealed mounting cavity (612), and a second hole (613) penetrating therethrough is provided on a side wall of the sealing shell (611); The power assembly (63) comprises: A first motor (631) is slidably disposed in the mounting cavity (612), and an output end thereof passes through the second hole (613) and is connected to the rotating shaft (62); A third connecting member (632), connected to the motor and having a third hole formed therein; A screw rod (633), one end of which is inserted into the third hole, and the screw rod (633) is threadedly connected to the third hole; and The second motor (634) is arranged in the installation cavity (612), and its output end is connected to an end of the screw rod (633) away from the third connecting member (632).

3. A tube sheet heat exchanger according to claim 2, characterized in that: The driving device further comprises a plurality of annular members; the annular members are arranged in one-to-one correspondence with the sealing shell (611); the annular members are connected to the sealing shell (611); the annular members surround the corresponding rotating shaft (62), and the inner rings of the plurality of annular members are all provided with an annular guide groove; the guide groove is arranged to be inclined at the ground and faces the corresponding first motor (631); The telescopic assembly (64) comprises: An inner rod (641) connected to the rotating shaft (62) and extending along the axis of the rotating shaft (62); An outer tube (642) having one end closed and slidably sleeved on the inner rod (641), with the closed end abutting against the guide groove; and A first spring (643) is disposed in the outer tube (642), one end of which is connected to the closed end of the outer tube (642), and the other end of which is connected to the end of the inner rod (641); The second connecting member (65) is connected to the outer tube (642).

4. A tube sheet heat exchanger according to claim 3, characterized in that: A guide tube (66) is connected to the outer tube (642), the axis of the guide tube (66) is perpendicular to the axis of the outer tube (642), a second spring (67) is arranged in the guide tube (66), the second connecting member (65) is slidably inserted into the guide tube (66), one end of the second spring (67) is connected to the outer wall of the outer tube (642), and the other end of the second spring (67) is connected to the second connecting member (65).

5. A tube sheet heat exchanger according to claim 4, characterized in that: A plurality of cutting blades (80) are connected to the strip-shaped cutting member (50).

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