A high-efficiency and energy-saving double tube sheet heat exchanger and method

Abstract

This invention discloses a high-efficiency and energy-saving dual-tube sheet heat exchange device and method, including a shell, tube boxes at both ends of the shell, and two sets of tube sheets between the tube boxes and the shell; two sets of arc-shaped mounting plates are arranged between the tube boxes and the shell, two sets of mounting semi-rings are symmetrically arranged on the inner wall of the arc-shaped mounting plates, and two sets of clamping semi-rings are also symmetrically arranged inside the arc-shaped mounting plates, with the positions of the two sets of clamping semi-rings adapted to the two sets of mounting semi-rings; a driving assembly is also arranged inside the arc-shaped mounting plates, and the driving assembly cooperates with the two sets of clamping semi-rings. The beneficial effect of this invention is that, through the cooperative structure of the arc-shaped mounting plates, mounting semi-rings, and clamping semi-rings, and with the clamping and limiting of the driving assembly, a non-welded detachable connection between the tube sheet and the shell is achieved. Compared with the disadvantage of traditional tube sheets being welded to the shell as a whole, which requires cutting for maintenance and replacement, this solution allows for quick disassembly of the tube sheet for maintenance or replacement.

Description

Technical Field

[0001] This invention relates to a highly efficient and energy-saving double tube sheet heat exchange device and method. Background Technology

[0002] As a key heat exchange device in chemical, energy and other fields, the structural reliability and ease of maintenance of the dual tube sheet heat exchanger directly affect the continuous operation efficiency of the production system.

[0003] Traditional double tubesheet structures often employ welding the tubesheet to the shell, forming a sealed connection through annular welds. However, after the tubesheet and shell are welded together, when tube blockage or tubesheet corrosion necessitates maintenance, the welds must be cut and removed, resulting in long maintenance cycles, high costs, and repeated welding that can degrade material properties. Furthermore, precise control of welding deformation during tubesheet assembly is required to ensure the flatness of the sealing surface, demanding extremely high skill levels from welding technicians and operators. Even slight errors can lead to internal or external leakage of the medium. In view of this, the present invention proposes a highly efficient and energy-saving double tubesheet heat exchange device and method to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a highly efficient and energy-saving dual tube sheet heat exchange device and method to solve the problems mentioned in the background art.

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

[0006] A high-efficiency and energy-saving dual tube sheet heat exchanger includes a shell, tube boxes are provided at both ends of the shell, and two sets of tube sheets are provided between the tube boxes and the shell;

[0007] Two sets of arc-shaped mounting plates are provided between the tube box and the shell. Two sets of mounting semi-rings are symmetrically arranged on the inner wall of the arc-shaped mounting plates. Two sets of clamping semi-rings are also symmetrically arranged inside the arc-shaped mounting plates. The positions of the two sets of clamping semi-rings are adapted to the two sets of mounting semi-rings. A driving component is also provided inside the arc-shaped mounting plates. The driving component cooperates with the two sets of clamping semi-rings to drive the clamping semi-rings to move towards the mounting semi-rings to clamp and limit the tube plate, so that the two sets of arc-shaped mounting plates completely wrap around the tube plate.

[0008] As an improvement to the above technical solution, the pipe box is provided with a first connecting pipe with an internal cavity, and the shell is provided with two sets of second connecting pipes with internal cavities.

[0009] Multiple sets of heat exchange pipes are arranged between the four sets of tube sheets, and multiple sets of baffles are arranged between the multiple sets of heat exchange pipes.

[0010] The outer diameter of the tube sheet is smaller than the inner diameter of the shell, and the baffle plate is in contact with but not connected to the inner wall of the shell.

[0011] As an improvement to the above technical solution, two sets of arc-shaped connecting plates are symmetrically arranged on the arc-shaped mounting plate, and a reinforcing connecting plate is provided between the two sets of arc-shaped connecting plates;

[0012] Both the pipe box and the shell are equipped with flanges, and the flanges are connected to the arc-shaped connecting plate.

[0013] The two sets of reinforcing connecting plates are respectively set on the arc-shaped surface of the arc-shaped mounting plate, and the two sets of reinforcing connecting plates are connected by bolts.

[0014] As an improvement to the above technical solution, the arc-shaped mounting plate is provided with a mounting protrusion, the clamping semi-ring contacts the mounting protrusion, and a hydraulic cavity is provided between the mounting protrusion and the arc-shaped mounting plate;

[0015] The drive assembly includes two sets of drive blocks, which are symmetrically arranged in the hydraulic cavity. The drive blocks are slidably sealed to the inner wall of the hydraulic cavity. A clamping hole is provided on the mounting protrusion, and a clamping rod is slidably sealed in the clamping hole. The clamping rod is connected to the drive block and the clamping half ring.

[0016] As an improvement to the above technical solution, multiple sets of tube sheet fixing holes are provided on the side wall of the tube sheet, and multiple sets of mounting fixing holes are provided between the two sets of arc-shaped mounting plates. The multiple sets of mounting fixing holes are matched with the multiple sets of tube sheet fixing holes, and the tube sheet fixing holes and mounting fixing holes are connected by bolts.

[0017] As an improvement to the above technical solution, multiple sets of clamping grooves are provided on the tube sheet, and a tube sheet inclined surface is provided on the clamping groove, and multiple sets of tube sheet bevels are provided at the clamping groove.

[0018] The clamping semi-ring is provided with multiple sets of clamping blocks, each set of clamping blocks being adapted to multiple sets of clamping grooves. Each clamping block is provided with a clamping inclined surface, which contacts the inclined surface of the tube sheet, guiding the clamping block to fully enter the clamping groove for clamping and limiting, and correcting the position of the tube sheet and the arc-shaped mounting plate, so that the tube sheet fixing hole and the mounting fixing hole are aligned.

[0019] As an improvement to the above technical solution, the drive block is provided with multiple sets of drive sleeves, and the drive sleeves are connected to the hydraulic cavity;

[0020] The arc-shaped mounting plate has multiple sets of drive grooves. The drive sleeve is slidably and sealingly disposed in the drive groove. The drive groove has a moving groove. The drive sleeve has a moving rod. The moving rod has a moving block. The moving block is slidably and sealingly engaged with the inner cavity of the drive sleeve. The drive sleeve has a drive end face. The drive end face has a drive through hole. The moving rod is slidably disposed in the drive through hole.

[0021] As an improvement to the above technical solution, a movable plate is provided on the movable rod, and the movable plate is slidably disposed in the movable groove;

[0022] A movable semi-ring is provided between the multiple sets of movable plates. The inner wall of the movable semi-ring is in contact with but not connected to the outer wall of the arc-shaped mounting plate. Multiple sets of screws are provided on the movable semi-ring. Multiple sets of connecting holes are opened on the arc-shaped connecting plate. The multiple sets of screws are adapted to the multiple sets of connecting holes. The movable semi-ring drives the screws to extend from the connecting holes into the bolt holes of the flange.

[0023] As an improvement to the above technical solution, a hydraulic oil pipe is provided on the arc-shaped mounting plate, and a sealed valve is provided on the hydraulic oil pipe. The hydraulic oil pipe is connected to the inner cavity of the hydraulic cavity.

[0024] The arc-shaped mounting plate is provided with a detection pipe, which is connected to the inner arc surface of the arc-shaped mounting plate.

[0025] A method for using a high-efficiency and energy-saving double tube sheet heat exchanger includes the following steps:

[0026] S10. Assembly:

[0027] Multiple sets of heat exchange pipes, four sets of tube sheets, and multiple sets of baffles are assembled, and the baffles are installed into the inner cavity of the shell, so that two sets of tube sheets are located at each end of the shell.

[0028] S20, Installation:

[0029] A set of arc-shaped mounting plates is hoisted to one side of the shell, and the hoisting position of the arc-shaped mounting plates is adjusted so that the tube sheet is placed between the mounting half ring and the clamping half ring, and the outer wall of the tube sheet is in contact with the inner wall of the arc-shaped mounting plates.

[0030] S30, One-time fixing:

[0031] Adjust the posture of the arc-shaped mounting plate so that the clamping block is initially aligned with the clamping groove. Then, through the drive component, the clamping half ring is moved toward the mounting half ring. Guided by the tube sheet slope and tube sheet bevel, it is fully inserted into the clamping groove for clamping, completing one fixing process.

[0032] S40, Secondary Fixation:

[0033] In S30, when the clamping block is fully inserted into the clamping groove, the posture of the arc-shaped mounting plate is corrected so that the tube sheet fixing hole and the mounting fixing hole are aligned, and bolts are installed in the tube sheet fixing hole and the mounting fixing hole to complete the secondary fixing process.

[0034] S50, three-stage fixation:

[0035] In S30, before the clamping block is fully inserted into the clamping groove, the pipe box is lifted and the flange on the pipe box is aligned with the arc-shaped connecting plate until the clamping block is fully inserted into the clamping groove. The half ring is moved synchronously so that the screw is placed between the connecting hole and the bolt hole on the pipe box flange. Then, the screw is connected to the outer wall of the screw with a nut that matches the screw to complete the three fixing processes.

[0036] S60, Reinstall:

[0037] Repeat steps S20, S30, S40, and S50 to install another set of arc-shaped mounting plates on the side of the housing where the arc-shaped mounting plates were previously installed, so that the reinforcing connecting plates on the two sets of arc-shaped mounting plates are aligned, and the connecting bolts of the two sets of reinforcing connecting plates are used to fix them, thus completing the tube sheet fixing process on one side of the housing.

[0038] S70, Synchronous Installation:

[0039] At the start of S20, S20, S30, S40, S50, and S60 are performed simultaneously on the other side of the shell until all the tube sheets on both sides of the shell are fixed.

[0040] S80, Sealing Inspection:

[0041] After the S70 is completed, a water-filling seal test is performed on the entire system. If the test fails, the defective area is disassembled and the defective parts are replaced.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] By using the combination structure of the arc-shaped mounting plate, the mounting half-ring and the clamping half-ring, and the clamping limit of the drive component, a non-welded detachable connection between the tube sheet and the shell is achieved. Compared with the disadvantage of traditional tube sheet and shell being welded together, which requires cutting for maintenance and replacement, this solution can quickly disassemble the tube sheet for maintenance or replacement, greatly reducing maintenance costs and downtime.

[0044] Four tube sheets are placed at both ends of the shell to form a double tube sheet structure. Combined with the wrapping installation of two sets of arc-shaped mounting plates, a buffer isolation chamber is formed between adjacent tube sheets. This structure effectively disperses the stress impact caused by the pressure fluctuation of the heat exchange medium. At the same time, it serves as a leak monitoring buffer. When any tube sheet leaks, the medium is confined in the buffer chamber, preventing the medium from leaking directly to the external environment or cross-contamination, which significantly improves the safety and reliability of the equipment.

[0045] Through the modular design of the arc-shaped mounting plate, the clamping half-ring and the drive component, the rapid assembly and precise positioning of the tube sheet and the shell are realized. Compared with the traditional welded tube sheet process that requires on-site welding and is irreversible, this solution can complete the rapid assembly of the tube sheet under non-welding conditions through the prefabricated arc-shaped mounting plate module combined with the clamping mechanism of the drive component, thereby improving the assembly efficiency.

[0046] The modular clamping assembly method using an arc-shaped mounting plate, hydraulic drive components, and clamping semi-rings achieves mechanical clamping and fixing of the tube sheet, completely replacing the welding process. This process only requires a short-term power supply from the hydraulic system, which can effectively reduce energy consumption compared to traditional welding. At the same time, the modular design supports the rapid disassembly and replacement of the tube sheet, and the maintenance time can be effectively shortened compared to traditional welding. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of the present invention;

[0048] Figure 2 This is a schematic diagram showing the positions of the tube sheet and baffles of the present invention;

[0049] Figure 3 This is a schematic diagram showing the positions of the arc-shaped mounting plate and tube sheet of the present invention;

[0050] Figure 4 For the present invention Figure 3 Side view;

[0051] Figure 5 For the present invention Figure 4 Sectional view of AA;

[0052] Figure 6 For the present invention Figure 3 Front view;

[0053] Figure 7 For the present invention Figure 6 Sectional view of BB;

[0054] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C;

[0055] Figure 9 For the present invention Figure 7 Enlarged structural diagram at point D;

[0056] Figure 10 This is a cross-sectional view of the arc-shaped mounting plate of the present invention;

[0057] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point E;

[0058] Figure 12This is a schematic diagram showing the positions of the arc-shaped mounting plate and the clamping semi-ring of the present invention;

[0059] Figure 13 This is a schematic diagram of the arc-shaped mounting plate of the present invention;

[0060] Figure 14 This is a schematic diagram of the tube sheet structure of the present invention;

[0061] Figure 15 For the present invention Figure 14 Enlarged structural diagram at point F;

[0062] Figure 16 This is a schematic diagram showing the positions of the movable half-ring and the pressed half-ring of the present invention.

[0063] In the diagram: 10. Pipe box; 11. First connecting pipe; 20. Arc-shaped mounting plate; 21. Inspection pipe; 22. Hydraulic oil pipe; 23. Hydraulic cavity; 24. Screw; 25. Moving semi-ring; 26. Mounting protrusion; 261. Clamping hole; 262. Drive groove; 263. Moving groove; 27. Mounting semi-ring; 28. Arc-shaped connecting plate; 281. Connecting hole; 282. Reinforcing connecting plate; 29. ​​Mounting fixing hole; 30. Shell; 31. First connecting pipe. 2. Connecting pipes; 32. Heat exchange pipes; 33. Baffles; 40. Flanges; 50. Tube sheet; 51. Tube sheet bevel; 52. Compression groove; 53. Tube sheet fixing holes; 54. Tube sheet bevel; 60. Drive assembly; 61. Drive block; 611. Moving block; 612. Drive sleeve; 6121. Drive end face; 613. Moving rod; 614. Moving plate; 62. Compression rod; 70. Compression half ring; 71. Compression bevel; 72. Compression block. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] Example:

[0066] like Figure 1-16 As shown, this embodiment proposes a high-efficiency and energy-saving dual tube sheet heat exchange device, including a shell 30, tube boxes 10 are provided at both ends of the shell 30, and two sets of tube sheets 50 are provided between the tube boxes 10 and the shell 30.

[0067] Two sets of arc-shaped mounting plates 20 are provided between the tube box 10 and the shell 30. Two sets of mounting semi-rings 27 are symmetrically arranged on the inner wall of the arc-shaped mounting plates 20. Two sets of clamping semi-rings 70 are also symmetrically arranged inside the arc-shaped mounting plates 20. The positions of the two sets of clamping semi-rings 70 and the two sets of mounting semi-rings 27 are adapted to each other. A driving assembly 60 is also provided inside the arc-shaped mounting plates 20. The driving assembly 60 cooperates with the two sets of clamping semi-rings 70 to drive the clamping semi-rings 70 to move towards the mounting semi-rings 27 to clamp and limit the tube sheet 50, so that the two sets of arc-shaped mounting plates 20 completely wrap around the tube sheet 50.

[0068] In this embodiment, when assembling the tube sheet 50, firstly, two sets of the four tube sheets 50 are placed at each end of the housing 30. Then, a set of arc-shaped mounting plates 20 is hoisted to one side of the housing 30. At the same time, the hoisting position of the arc-shaped mounting plates 20 is adjusted so that the tube sheet 50 is placed between the mounting half ring 27 and the clamping half ring 70, and the outer wall of the tube sheet 50 is in contact with the inner wall of the arc-shaped mounting plates 20. Then, the clamping half ring 70 is moved toward the mounting half ring 27 by the driving component 60. The assembly steps of the arc-shaped mounting plates 20 are repeated so that the two sets of arc-shaped mounting plates 20 are completely wrapped around the tube sheet 50. At the same time, the arc-shaped mounting plates 20 are connected to the tube box 10 and the housing 30. When the two sets of tube sheets 50 on one side of the housing 30 are installed, the above assembly steps are performed simultaneously on the other side of the housing 30, thereby completing the overall assembly steps and wrapping the tube sheet 50.

[0069] Through the cooperative structure of the arc-shaped mounting plate 20, the mounting half-ring 27 and the clamping half-ring 70, and the clamping limit of the drive component 60, a non-welded detachable connection between the tube sheet 50 and the housing 30 is achieved. Compared with the disadvantage of the traditional tube sheet 50 and housing 30 being welded together, which requires cutting for maintenance and replacement, this solution can quickly disassemble the tube sheet 50 for maintenance or replacement, greatly reducing maintenance costs and downtime.

[0070] Four tube sheets 50 are placed at both ends of the shell 30 to form a double tube sheet structure. Combined with the wrapping installation of two sets of arc-shaped mounting plates 20, a buffer isolation chamber is formed between adjacent tube sheets 50. This structure effectively disperses the stress impact caused by the pressure fluctuation of the heat exchange medium. At the same time, it serves as a leakage monitoring buffer. When any tube sheet 50 leaks, the medium is confined in the buffer chamber, preventing the medium from directly leaking to the external environment or cross-contamination, which significantly improves the safety and reliability of the equipment.

[0071] Through the modular design of the arc-shaped mounting plate 20, the clamping half ring 70 and the drive component 60, the rapid assembly and precise positioning of the tube sheet 50 and the shell 30 are realized. Compared with the traditional welded tube sheet, which requires on-site welding and is irreversible, this solution can complete the rapid assembly of the tube sheet 50 under non-welding conditions through the prefabricated arc-shaped mounting plate module combined with the clamping mechanism of the drive component, thereby improving the assembly efficiency.

[0072] The modular clamping assembly method of the arc-shaped mounting plate 20, hydraulic drive component 60 and clamping half ring 70 achieves mechanical clamping and fixing of the tube sheet 50, completely replacing the welding process. This process only requires a short power supply from the hydraulic system, which can effectively reduce energy consumption compared with traditional welding. At the same time, the modular design supports the quick disassembly and replacement of the tube sheet 50, and the maintenance time can be effectively shortened compared with traditional welding.

[0073] Specifically, the pipe box 10 is provided with a first connecting pipe 11 that communicates with the inner cavity, and the shell 30 is provided with two sets of second connecting pipes 31 that communicate with the inner cavity;

[0074] Multiple sets of heat exchange pipes 32 are arranged between the four sets of tube sheets 50, and multiple sets of baffles 33 are arranged between the multiple sets of heat exchange pipes 32.

[0075] The outer diameter of the tube sheet 50 is smaller than the inner diameter of the shell 30, and the baffle plate 33 is in contact with but not connected to the inner wall of the shell 30.

[0076] In this embodiment, the first connecting pipes 11 on the two sets of pipe boxes 10 are arranged in opposite directions, and the two sets of second connecting pipes 31 are arranged in opposite directions.

[0077] Of course, the gap design between the outer diameter of the tube sheet 50 and the inner diameter of the shell 30 (preferably the gap value is 1.5%-2% of the wall thickness of the shell 30) can absorb the machining tolerance of the tube sheet 50 and the forming tolerance of the shell 30, and reduce the assembly accuracy requirements.

[0078] The non-welded installation of the baffle plate 33 allows it to be disassembled as a whole with the tube sheet 50 module, facilitating quick cleaning or replacement of the baffle plate 33 and reducing downtime for maintenance.

[0079] Specifically, two sets of arc-shaped connecting plates 28 are symmetrically arranged on the arc-shaped mounting plate 20, and a reinforcing connecting plate 282 is arranged between the two sets of arc-shaped connecting plates 28;

[0080] Both the pipe box 10 and the shell 30 are provided with flanges 40, and the flanges 40 are connected to the arc-shaped connecting plate 28.

[0081] The two sets of reinforcing connecting plates 282 are respectively set on the arc-shaped surface of the arc-shaped mounting plate 20, and the two sets of reinforcing connecting plates 282 are connected by bolts.

[0082] In this case, when the tube sheet 50 is placed at the arc-shaped mounting plate 20, a sealing gasket can be provided on the tube sheet 50 to improve the sealing performance.

[0083] Of course, when connecting the flange 40 to the two sets of arc-shaped mounting plates 20, a sealing gasket can be added at the connection to improve the sealing performance;

[0084] Of course, when connecting the two sets of reinforcing connecting plates 282, a sealing gasket can be added at the connection to improve the sealing performance.

[0085] In this embodiment, when the pipe box 10 or the shell 30 is connected to the arc-shaped mounting plate 20, the flange 40 on the pipe box 10 or the shell 30 is coaxially arranged with the arc-shaped connecting plate 28, so that the flange 40 is aligned with the two sets of arc-shaped connecting plates 28 at the same time, and then the connection is made to achieve the effect of flange connection.

[0086] Of course, after the two arc-shaped mounting plates 20 are aligned, the reinforcing connecting plates 282 on the two sets of arc-shaped mounting plates 20 are aligned, and then bolts are connected between the two sets of reinforcing connecting plates 282 to complete the modular assembly process.

[0087] Specifically, the arc-shaped mounting plate 20 is provided with a mounting protrusion 26, the clamping half ring 70 contacts the mounting protrusion 26, and a hydraulic cavity 23 is provided between the mounting protrusion 26 and the arc-shaped mounting plate 20;

[0088] The drive assembly 60 includes two sets of drive blocks 61, which are symmetrically arranged in the hydraulic cavity 23. The drive blocks 61 are slidably sealed to the inner wall of the hydraulic cavity 23. A clamping hole 261 is provided on the mounting protrusion 26. A clamping rod 62 is slidably sealed in the clamping hole 261. The clamping rod 62 is connected to the drive block 61 and the clamping half ring 70.

[0089] In this embodiment, when the tube sheet 50 is pressed, hydraulic oil is injected into the hydraulic cavity 23, causing the drive block 61 to move in the hydraulic cavity 23, thereby driving the pressing rod 62 to move in the pressing hole 261, driving the pressing half ring 70 to move towards the mounting half ring 27 to press the tube sheet 50.

[0090] Specifically, multiple sets of tube sheet fixing holes 53 are provided on the side wall of the tube sheet 50, and multiple sets of mounting fixing holes 29 are provided between the two sets of arc-shaped mounting plates 20. The multiple sets of mounting fixing holes 29 are matched with the multiple sets of tube sheet fixing holes 53 in position, and the tube sheet fixing holes 53 and mounting fixing holes 29 are connected by bolts.

[0091] In this embodiment, after the tube sheet 50 is compressed, installing bolts between the tube sheet fixing hole 53 and the mounting fixing hole 29 can further improve the stability of the connection between the tube sheet 50 and the arc-shaped mounting plate 20.

[0092] Specifically, the tube sheet 50 has multiple sets of clamping grooves 52, the clamping grooves 52 have tube sheet inclined surfaces 51, and the clamping grooves 52 have multiple sets of tube sheet bevels 54.

[0093] The clamping semi-ring 70 is provided with multiple sets of clamping blocks 72, and the multiple sets of clamping blocks 72 are respectively adapted to multiple sets of clamping grooves 52. The clamping blocks 72 are provided with clamping inclined surfaces 71. The clamping inclined surfaces 71 contact the inclined surfaces 51 of the tube sheet, guide the clamping blocks 72 to fully enter the clamping grooves 52 for clamping and limiting, and correct the positions of the tube sheet 50 and the arc-shaped mounting plate 20, so that the tube sheet fixing holes 53 and the mounting fixing holes 29 are aligned.

[0094] In this embodiment, when the clamping half-ring 70 is displaced toward the mounting half-ring 27, the clamping block 72 can be fully inserted into the clamping groove 52.

[0095] After the clamping block 72 is fully embedded in the clamping groove 52, its side wall forms a surface contact constraint with the inner wall of the clamping groove 52, which effectively suppresses the circumferential micro-movement of the tube sheet 50 under fluid impact or thermal stress, avoids loosening of bolt connections due to long-term vibration, ensures long-term stability of the sealing interface, and reduces the risk of leakage.

[0096] When the clamping inclined surface 71 of the clamping block 72 contacts the inclined surface 51 of the tube sheet, it generates a guiding effect, forcing the clamping block 72 to slide precisely into the tube sheet bevel 54 path of the clamping groove 52. This automatically corrects the radial offset and circumferential angle deviation between the tube sheet 50 and the arc-shaped mounting plate 20, achieving alignment between the tube sheet fixing hole 53 and the mounting fixing hole 29. This eliminates the alignment problem that traditional bolt connections require repeated manual adjustments, ensuring precise alignment between the tube sheet fixing hole 53 and the mounting fixing hole 29 without manual intervention.

[0097] Meanwhile, the inclined plane guiding mechanism simplifies the multi-step "coarse adjustment-fine adjustment-fixing" required for traditional tube sheet positioning into a one-time pressing action, shortening the assembly time; at the same time, the reversible withdrawal characteristic of the clamping block 72, i.e. the reverse action of the drive component 60, supports the quick disassembly and maintenance of the tube sheet 50, avoiding the replacement cost caused by the cutting and damage of the traditional welded tube sheet 50.

[0098] Of course, when disassembling the arc-shaped mounting plate 20, the arc-shaped mounting plate 20 is hoisted. The clamping inclined surface 71 and the tube plate inclined surface 51 generate a component force guiding effect in the reverse displacement. Under the pressure relief of the hydraulic cavity 23, the drive block 61 retracts synchronously with the displacement of the arc-shaped mounting plate 20 after hydraulic unloading, forcing the clamping block 72 to automatically slide out along the exit path of the clamping groove 52. This decouples the exit action of the clamping block 72 from the dynamic hydraulic system. Separation can be completed with only the hoisting mechanical pulling force, which can effectively reduce energy consumption compared with the traditional hydraulic jacking disassembly.

[0099] Of course, when hoisting the arc-shaped mounting plate 20, the upper and lower sets of arc-shaped mounting plates 20 are hoisted and disassembled separately. When hoisting and disassembling the upper set of arc-shaped mounting plates 20, they can be hoisted directly to detach them. When hoisting and disassembling the lower set of arc-shaped mounting plates 20, a downward pulling force is first applied to the arc-shaped mounting plate 20 using a winch. After the arc-shaped mounting plate 20 is detached, it is then hoisted.

[0100] Specifically, the drive block 61 is provided with multiple sets of drive sleeves 612, and the drive sleeves 612 are connected to the hydraulic cavity 23;

[0101] The arc-shaped mounting plate 20 has multiple sets of drive grooves 262. The drive sleeve 612 is slidably and sealingly disposed in the drive groove 262. The drive groove 262 has a moving groove 263. The drive sleeve 612 is provided with a moving rod 613. The moving rod 613 is provided with a moving block 611. The moving block 611 is slidably and sealingly engaged with the inner cavity of the drive sleeve 612. The drive sleeve 612 is provided with a drive end face 6121. The drive end face 6121 has a drive through hole. The moving rod 613 is slidably disposed in the drive through hole.

[0102] Specifically, a movable plate 614 is provided on the movable rod 613, and the movable plate 614 is slidably disposed in the movable groove 263;

[0103] A movable semi-ring 25 is provided between multiple sets of movable plates 614. The inner wall of the movable semi-ring 25 is in contact with but not connected to the outer wall of the arc-shaped mounting plate 20. Multiple sets of screws 24 are provided on the movable semi-ring 25. Multiple sets of connecting holes 281 are provided on the arc-shaped connecting plate 28. The multiple sets of screws 24 are adapted to the multiple sets of connecting holes 281. The movable semi-ring 25 drives the screws 24 to extend from the connecting holes 281 into the bolt holes of the flange 40.

[0104] In this case, the outer wall of the screw 24 is threaded with a nut (not shown in the drawing).

[0105] In this embodiment, when the clamping half-ring 70 moves toward the mounting half-ring 27, the hydraulic oil in the hydraulic cavity 23 simultaneously enters the inner cavity of the drive sleeve 612, causing the moving rod 613 to move, thereby causing the moving half-ring 25 to move toward the arc-shaped mounting plate 20 until the moving half-ring 25 contacts the arc-shaped mounting plate 20, thereby causing the screw 24 to extend from the connecting hole 281 into the bolt hole of the flange 40. Then, a matching nut is connected to the outer wall of the screw 24 to complete the connection process between the flange 40 and the arc-shaped connecting plate 28, that is, to complete the connection process between the flange 40 and the arc-shaped mounting plate 20.

[0106] The hydraulic oil drives the inner cavity of the drive sleeve 612 to move the rod 613 to generate axial displacement, which drives the moving half ring 25 and the screw 24 to advance synchronously, so that the tube sheet 50 pressing process and the flange bolt connection are completed simultaneously. The traditional step-by-step mechanical pressing and bolt fastening are integrated into a single hydraulic action, which greatly shortens the assembly time and improves the installation efficiency.

[0107] The moving rod 613 forms a multi-point drive mechanism through the rigid connection between the moving plate 614 and the moving half ring 25. Under hydraulic action, it forces each screw 24 to be precisely guided along the moving groove 263, automatically aligning the connecting hole 281 with the flange bolt hole, eliminating manual alignment error, ensuring the coaxiality of the connecting hole 281 and the flange hole, and improving assembly accuracy.

[0108] During hydraulic unloading, the moving rod 613 can reverse and retract to drive the screw 24 to disengage from the flange connection, achieving non-destructive and rapid disassembly. Combined with the synchronous withdrawal of the clamping half ring 70, a reversible assembly mechanism is formed, which facilitates the overall replacement of the tube sheet 50 and flange assembly during maintenance, reducing maintenance complexity. Moreover, the dual processes of clamping and flange connection are completed simultaneously using a single hydraulic power source, replacing the traditional step-by-step mechanical fastening or welding process, reducing energy conversion links, significantly reducing assembly energy consumption, and reducing the number of parts through structural integration, thereby improving the reliability of the device.

[0109] Of course, the tightening of the screw 24 and the nut forms an axial mechanical preload. This preload is transmitted in the opposite direction to the drive sleeve 612 and drive block 61 through the moving rod 613, and is converted into an additional radial clamping force of the clamping block 72 on the tube sheet 50. This mechanism dynamically couples the axial locking force of the flange connection surface with the radial constraint force of the tube sheet 50, forming a two-way mechanical closed loop, which significantly improves the contact pressure between the clamping block 72 and the clamping groove 52, ensuring the anti-relaxation performance of the clamping interface under high-frequency vibration or thermal stress during long-term operation. Moreover, when the clamping force decreases due to leakage or pressure fluctuation in the hydraulic system, the mechanical preload can still maintain the constraint of the clamping block 72 on the tube sheet 50, avoiding seal failure. This redundant design greatly improves the safety margin of the equipment under extreme working conditions and reduces the risk of accidental leakage.

[0110] Specifically, the arc-shaped mounting plate 20 is provided with a hydraulic oil pipe 22, the hydraulic oil pipe 22 is provided with a sealed valve, and the hydraulic oil pipe 22 is connected to the inner cavity of the hydraulic cavity 23;

[0111] The arc-shaped mounting plate 20 is provided with a detection pipe 21, which is connected to the inner arc surface of the arc-shaped mounting plate 20.

[0112] In this embodiment, the hydraulic oil pipe 22 facilitates the injection or extraction of hydraulic oil into the hydraulic cavity 23, and the detection pipe 21 enables the detection of the interior of the annular structure formed by the combination of the two sets of arc-shaped mounting plates 20. In the event of a leak, it facilitates timely shutdown and maintenance procedures.

[0113] A highly efficient and energy-saving double tube sheet heat exchanger is easy to use and includes the following steps:

[0114] S10. Assembly:

[0115] Multiple sets of heat exchange pipes 32, four sets of tube sheets 50 and multiple sets of baffles 33 are assembled, and the baffles 33 are assembled into the inner cavity of the shell 30, so that every two sets of the four sets of tube sheets 50 are located at both ends of the shell 30.

[0116] S20, Installation:

[0117] A set of arc-shaped mounting plates 20 are hoisted to one side of the housing 30. At the same time, the hoisting position of the arc-shaped mounting plates 20 is adjusted so that the tube sheet 50 is placed between the mounting half ring 27 and the clamping half ring 70, and the outer wall of the tube sheet 50 is in contact with the inner wall of the arc-shaped mounting plates 20.

[0118] S30, One-time fixing:

[0119] Adjust the posture of the arc-shaped mounting plate 20 so that the clamping block 72 is initially aligned with the clamping groove 52. Then, through the drive component 60, the clamping half ring 70 is moved toward the mounting half ring 27. Under the guidance of the tube sheet inclined surface 51 and the tube sheet bevel 54, it is fully inserted into the clamping groove 52 for clamping, thus completing one fixing process.

[0120] S40, Secondary Fixation:

[0121] In S30, when the clamping block 72 is fully inserted into the clamping groove 52, the posture of the arc-shaped mounting plate 20 is corrected so that the tube plate fixing hole 53 and the mounting fixing hole 29 are aligned, and bolts are installed in the tube plate fixing hole 53 and the mounting fixing hole 29 to complete the secondary fixing process.

[0122] S50, three-stage fixation:

[0123] In S30, before the clamping block 72 is fully inserted into the clamping groove 52, the pipe box 10 is lifted up and the flange 40 on the pipe box 10 is aligned with the arc-shaped connecting plate 28 until the clamping block 72 is fully inserted into the clamping groove 52. The moving half ring 25 is moved synchronously so that the screw 24 is placed between the connecting hole 281 and the bolt hole on the flange 40 of the pipe box 10. Then, the nut that matches the screw 24 is connected to the outer wall of the screw 24 to complete the three fixing processes.

[0124] S60, Reinstall:

[0125] Repeat steps S20, S30, S40, and S50 to install another set of arc-shaped mounting plates 20 on the side of the housing 30 where the arc-shaped mounting plates 20 were previously installed, so that the reinforcing connecting plates 282 on the two sets of arc-shaped mounting plates 20 are aligned, and the two sets of reinforcing connecting plates 282 are fixed with connecting bolts to complete the tube sheet 50 fixing process on one side of the housing 30.

[0126] S70, Synchronous Installation:

[0127] At the beginning of S20, S20, S30, S40, S50 and S60 are performed simultaneously on the other side of the housing 30 until the tube sheets 50 on both sides of the housing 30 are completely fixed.

[0128] S80, Sealing Inspection:

[0129] After the S70 is completed, a water-filling seal test is performed on the entire system. If the test fails, the defective area is disassembled and the defective parts are replaced.

[0130] In this embodiment, a three-level progressive constraint is formed by the hydraulic clamping guidance of the first fixing S30, the bolt hole alignment and locking of the second fixing S40, and the flange connection pre-tightening of the third fixing S50. This optimizes the contact pressure between the clamping block 72 and the clamping groove 52, the circumferential positioning accuracy between the tube sheet 50 and the shell 30, and the sealing pre-tightening force of the flange connection step by step. This eliminates stress concentration or assembly deviation caused by a single fixing, ensures uniform stress on each sealing interface, and significantly reduces the risk of micro-leakage at the interface during operation.

[0131] In the synchronous installation step S70, the fixing process of the tube sheets 50 on both sides of the housing 30 is carried out in parallel. By sharing the hydraulic drive system and the standardized hoisting process, the traditional serial assembly mode is optimized into parallel operation, which shortens the installation time of the tube sheets 50 on both sides, improves the overall assembly efficiency, and greatly reduces the equipment downtime installation cycle.

[0132] Each fixing step S30-S50 adopts a non-welded mechanical connection method. Combined with the partial disassembly and replacement mechanism after the seal test S80, when a single component fails, directional disassembly can be achieved by reversing the fixing steps. The maintenance operation time is shortened compared with the traditional welded structure, and no destructive cutting is required, thus reducing the cost of spare parts replacement.

[0133] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving double tube sheet heat exchanger, characterized in that: Includes a housing (30), with tube boxes (10) provided at both ends of the housing (30), and two sets of tube sheets (50) provided between the tube boxes (10) and the housing (30). Two sets of arc-shaped mounting plates (20) are provided between the tube box (10) and the shell (30). Two sets of mounting half rings (27) are symmetrically arranged on the inner wall of the arc-shaped mounting plate (20). Two sets of clamping half rings (70) are also symmetrically arranged inside the arc-shaped mounting plate (20). The two sets of clamping half rings (70) are matched with the two sets of mounting half rings (27). A driving assembly (60) is also provided inside the arc-shaped mounting plate (20). The driving assembly (60) cooperates with the two sets of clamping half rings (70) to drive the clamping half rings (70) to move towards the mounting half rings (27) to clamp and limit the tube plate (50), so that the two sets of arc-shaped mounting plates (20) completely wrap around the tube plate (50). The arc-shaped mounting plate (20) is provided with a mounting protrusion (26), the clamping half ring (70) contacts the mounting protrusion (26), and a hydraulic cavity (23) is provided between the mounting protrusion (26) and the arc-shaped mounting plate (20). The drive assembly (60) includes two sets of drive blocks (61), which are symmetrically arranged in the hydraulic cavity (23). The drive blocks (61) are slidably sealed to the inner wall of the hydraulic cavity (23). A clamping hole (261) is provided on the mounting protrusion (26), and a clamping rod (62) is slidably sealed in the clamping hole (261). The clamping rod (62) is connected to the drive block (61) and the clamping half ring (70). Multiple sets of tube sheet fixing holes (53) are provided on the side wall of the tube sheet (50), and multiple sets of mounting fixing holes (29) are provided between the two sets of arc-shaped mounting plates (20). The multiple sets of mounting fixing holes (29) are matched with the multiple sets of tube sheet fixing holes (53) in position, and the tube sheet fixing holes (53) and mounting fixing holes (29) are connected by bolts. The tube sheet (50) has multiple sets of clamping grooves (52), the clamping grooves (52) have tube sheet inclined surfaces (51), and the clamping grooves (52) have multiple sets of tube sheet bevels (54). The clamping half-ring (70) is provided with multiple sets of clamping blocks (72), and the multiple sets of clamping blocks (72) are respectively adapted to multiple sets of clamping grooves (52). The clamping blocks (72) are provided with clamping inclined surfaces (71), and the clamping inclined surfaces (71) contact the tube sheet inclined surfaces (51) to guide the clamping blocks (72) to fully enter the clamping grooves (52) for clamping and limiting, and correct the positions of the tube sheet (50) and the arc-shaped mounting plate (20) so that the tube sheet fixing holes (53) and the mounting fixing holes (29) are aligned.

2. The high-efficiency and energy-saving double tube sheet heat exchanger according to claim 1, characterized in that: The pipe box (10) is provided with a first connecting pipe (11) with an inner cavity connected, and the shell (30) is provided with two sets of second connecting pipes (31) with an inner cavity connected. Multiple sets of heat exchange pipes (32) are arranged between the four sets of tube sheets (50), and multiple sets of baffles (33) are arranged between the multiple sets of heat exchange pipes (32). The outer diameter of the tube sheet (50) is smaller than the inner diameter of the shell (30), and the baffle plate (33) is in contact with the inner wall of the shell (30) but not connected.

3. The high-efficiency and energy-saving double tube sheet heat exchanger according to claim 2, characterized in that: Two sets of arc-shaped connecting plates (28) are symmetrically arranged on the arc-shaped mounting plate (20), and a reinforcing connecting plate (282) is provided between the two sets of arc-shaped connecting plates (28). Both the pipe box (10) and the shell (30) are provided with flanges (40), and the flanges (40) are connected to the arc-shaped connecting plate (28); The two sets of reinforcing connecting plates (282) are respectively set on the arc surface of the arc mounting plate (20), and the two sets of reinforcing connecting plates (282) are connected by bolts.

4. The high-efficiency and energy-saving double tube sheet heat exchanger according to claim 3, characterized in that: The drive block (61) is provided with multiple sets of drive sleeves (612), and the drive sleeves (612) are connected to the hydraulic cavity (23); The arc-shaped mounting plate (20) has multiple sets of drive grooves (262), the drive sleeve (612) is slidably and sealed in the drive groove (262), the drive groove (262) has a moving groove (263), the drive sleeve (612) has a moving rod (613) inside, the moving rod (613) has a moving block (611) on it, the moving block (611) is slidably and sealed with the inner cavity of the drive sleeve (612), the drive sleeve (612) has a drive end face (6121), the drive end face (6121) has a drive through hole, and the moving rod (613) is slidably disposed in the drive through hole.

5. The high-efficiency and energy-saving double tube sheet heat exchanger according to claim 4, characterized in that: A movable plate (614) is provided on the movable rod (613), and the movable plate (614) is slidably disposed in the movable groove (263); A movable semi-ring (25) is provided between multiple sets of movable plates (614). The inner wall of the movable semi-ring (25) is in contact with but not connected to the outer wall of the arc-shaped mounting plate (20). Multiple sets of screws (24) are provided on the movable semi-ring (25). Multiple sets of connecting holes (281) are opened on the arc-shaped connecting plate (28). The multiple sets of screws (24) are adapted to the multiple sets of connecting holes (281). The movable semi-ring (25) drives the screws (24) to extend from the connecting holes (281) into the bolt holes of the flange (40).

6. The high-efficiency and energy-saving double tube sheet heat exchanger according to claim 5, characterized in that: The arc-shaped mounting plate (20) is provided with a hydraulic oil pipe (22), and the hydraulic oil pipe (22) is provided with a sealed valve. The hydraulic oil pipe (22) is connected to the inner cavity of the hydraulic cavity (23). The arc-shaped mounting plate (20) is provided with a detection pipe (21), which is connected to the inner arc surface of the arc-shaped mounting plate (20).

7. A method of using a high-efficiency and energy-saving double tube sheet heat exchanger as described in claim 6, characterized in that: Includes the following steps: S10, Assembly: Multiple sets of heat exchange pipes (32), four sets of tube sheets (50) and multiple sets of baffles (33) are assembled, and the baffles (33) are assembled into the inner cavity of the shell (30), so that each pair of the four sets of tube sheets (50) is located at both ends of the shell (30); S20, Installation: A set of arc-shaped mounting plates (20) are hoisted to one side of the housing (30), and the hoisting position of the arc-shaped mounting plates (20) is adjusted so that the tube sheet (50) is placed between the mounting half ring (27) and the clamping half ring (70), and the outer wall of the tube sheet (50) is in contact with the inner wall of the arc-shaped mounting plates (20); S30, One-time fixing: Adjust the posture of the arc mounting plate (20) so that the clamping block (72) is initially aligned with the clamping groove (52), and use the drive assembly (60) to move the clamping half ring (70) toward the mounting half ring (27). Guided by the tube sheet inclined surface (51) and the tube sheet bevel (54), it fully enters the clamping groove (52) for clamping, thus completing one fixing process. S40, Secondary Fixation: In S30, when the clamping block (72) is fully inserted into the clamping groove (52), the posture of the arc-shaped mounting plate (20) is corrected so that the tube plate fixing hole (53) and the mounting fixing hole (29) are aligned, and bolts are installed in the tube plate fixing hole (53) and the mounting fixing hole (29) to complete the secondary fixing process; S50, three-stage fixation: In S30, before the clamping block (72) is fully inserted into the clamping groove (52), the pipe box (10) is lifted up and the flange (40) on the pipe box (10) is aligned with the arc-shaped connecting plate (28) until the clamping block (72) is fully inserted into the clamping groove (52). The moving half ring (25) is moved synchronously so that the screw (24) is placed between the connecting hole (281) and the bolt hole on the flange (40) of the pipe box (10). Then, a nut that matches the screw (24) is connected to the outer wall of the screw (24) to complete the three fixing processes. S60, Reinstall: Repeat steps S20, S30, S40, and S50 to install another set of arc-shaped mounting plates (20) on the side of the housing (30) where the arc-shaped mounting plate (20) was previously installed, so that the reinforcing connecting plates (282) on the two sets of arc-shaped mounting plates (20) are aligned, and the connecting bolts of the two sets of reinforcing connecting plates (282) are used to fix them, thus completing the tube sheet (50) fixing process on one side of the housing (30); S70, Synchronous Installation: At the beginning of S20, S20, S30, S40, S50 and S60 are performed simultaneously on the other side of the housing (30) until the tube sheets (50) on both sides of the housing (30) are all fixed. S80, Sealing Inspection: After the S70 is completed, a water-filling seal test is performed on the entire system. If the test fails, the defective area is disassembled and the defective parts are replaced.

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