Efficient and energy-saving double-tube-plate heat exchange device and method

Abstract

The efficient and energy-saving double-tube-plate heat exchange device comprises a shell, tube boxes are arranged at the two ends of the shell, and two sets of tube plates are arranged between the tube boxes and the shell; two sets of arc-shaped mounting plates are arranged between the tube box and the shell, two sets of mounting semi-rings are symmetrically arranged on the inner walls of the arc-shaped mounting plates, two sets of pressing semi-rings are further symmetrically arranged in the arc-shaped mounting plates, the two sets of pressing semi-rings are matched with the two sets of mounting semi-rings in position, and a driving assembly is further arranged in the arc-shaped mounting plates. The driving assembly is matched with the two groups of pressing semi-rings; compared with the prior art, the non-welding type detachable connecting device has the beneficial effects that non-welding type detachable connection of the tube plate and the shell is achieved through the matching structure of the arc-shaped mounting plate, the mounting semi-ring and the pressing semi-ring in cooperation with pressing and limiting of the driving assembly, and compared with the defect that cutting is needed for maintenance and replacement due to the fact that a traditional tube plate and a shell are welded into a whole, the welding efficiency is improved; according to the scheme, the tube plate can be quickly detached for maintenance or replacement.

Description

Technical Field

[0001] The invention relates to a high-efficiency and energy-saving double-tube plate heat exchange device and method. Background Art

[0002] As a key heat exchange equipment in the fields of chemical industry, energy, etc., the structural reliability and maintenance convenience of the double-tube sheet heat exchanger directly affect the continuous operation efficiency of the production system.

[0003] Traditional double-tube sheet structures mostly use a welding fixation method for the tube sheet and the shell, forming a sealed connection through an annular weld. However, after the tube sheet and the shell are welded into an integral body, when the tube bundle is blocked or the tube sheet is corroded and needs to be repaired, the weld must be cut and destructively removed, resulting in a long maintenance cycle and high cost. Repeated welding can easily cause material performance degradation. In addition, when assembling the tube sheet, the welding deformation must be precisely controlled to ensure the flatness of the sealing surface, which places extremely high demands on the welding process and the operator's skills. The slightest carelessness can lead to internal or external leakage of the medium. In view of this, the present invention proposes a high-efficiency and energy-saving double-tube sheet heat exchange device and method to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a high-efficiency and energy-saving double-tube sheet heat exchange device and method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A high-efficiency and energy-saving double-tube sheet heat exchange device comprises 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; Two groups of arc-shaped mounting plates are arranged between the pipe box and the shell, and two groups of mounting half rings are symmetrically arranged on the inner wall of the arc-shaped mounting plate. Two groups of clamping half rings are also symmetrically arranged in the arc-shaped mounting plate. The two groups of clamping half rings are adapted to the positions of the two groups of mounting half rings. A driving assembly is also arranged in the arc-shaped mounting plate, and the driving assembly cooperates with the two groups of clamping half rings to drive the clamping half rings to move toward the mounting half rings to clamp and limit the tube sheet, so that the two groups of arc-shaped mounting plates are completely wrapped on the tube sheet.

[0006] As an improvement to the above technical solution, the pipe box is provided with a first connecting pipe with a communicating inner cavity, and the shell is provided with two sets of second connecting pipes with a communicating inner cavity; Multiple groups of heat exchange pipes are arranged between the four groups of tube sheets, and multiple groups of baffles are arranged between the multiple groups of heat exchange pipes; The outer diameter of the tube sheet is smaller than the inner diameter of the shell, and the baffle is in contact with the inner wall of the shell but not connected.

[0007] As an improvement to the above technical solution, two groups of arc-shaped connecting plates are symmetrically arranged on the arc-shaped mounting plate, and a reinforcement connecting plate is arranged between the two groups of arc-shaped connecting plates; The pipe box and the shell are both provided with flanges, and the flanges are connected to the arc-shaped connecting plate; The two groups of reinforcement connecting plates are respectively arranged on the arc-shaped surfaces of the arc-shaped mounting plate, and the two groups of reinforcement connecting plates are connected by bolts.

[0008] As an improvement to the above technical solution, the arc-shaped mounting plate is provided with a mounting protrusion, the clamping half ring is in contact with the mounting protrusion, and a hydraulic cavity is provided between the mounting protrusion and the arc-shaped mounting plate; The driving assembly includes two groups of driving blocks, which are symmetrically arranged in the hydraulic cavity. The driving blocks are slidingly sealed with the inner wall of the hydraulic cavity. A clamping hole is opened on the mounting protrusion, and a clamping rod is slidingly sealed in the clamping hole. The clamping rod is connected to the driving block and the clamping half ring.

[0009] As an improvement to the above technical solution, multiple groups of tube sheet fixing holes are provided on the side wall of the tube sheet, and multiple groups of mounting fixing holes are provided between the two groups of the arc-shaped mounting plates. The multiple groups of mounting fixing holes are adapted to the positions of the multiple groups of tube sheet fixing holes, and the tube sheet fixing holes and the mounting fixing holes are connected by bolts.

[0010] As an improvement to the above technical solution, the tube sheet is provided with a plurality of pressing grooves, the pressing grooves are provided with tube sheet inclined surfaces, and the pressing grooves are provided with a plurality of tube sheet grooves; The clamping half ring is provided with multiple groups of clamping blocks, and the multiple groups of clamping blocks are respectively adapted to the multiple groups of clamping grooves. The clamping blocks are provided with clamping inclined surfaces, which contact the inclined surfaces of the tube sheets, guiding the clamping blocks to fully enter the clamping grooves for clamping and limiting, and correcting the positions of the tube sheets and the arc-shaped mounting plates so that the tube sheet fixing holes and the mounting fixing holes are aligned.

[0011] As an improvement to the above technical solution, the driving block is provided with multiple sets of driving sleeves, and the driving sleeves are communicated with the hydraulic cavity; The arc-shaped mounting plate is provided with a plurality of driving grooves, the driving sleeve is slidingly sealed and arranged in the driving groove, a moving groove is provided on the driving groove, a moving rod is provided in the driving sleeve, a moving block is provided on the moving rod, the moving block is slidingly sealed with the inner cavity of the driving sleeve, a driving end face is provided on the driving sleeve, a driving through hole is provided on the driving end face, and the moving rod is slidingly arranged in the driving through hole.

[0012] As an improvement of the above technical solution, a movable plate is provided on the movable rod, and the movable plate is slidably arranged in the movable groove; A movable semi-ring is arranged between multiple groups of movable plates, the inner wall of the movable semi-ring is in contact with the outer wall of the arc-shaped mounting plate but not connected, multiple groups of screws are arranged on the movable semi-ring, and multiple groups of connecting holes are opened on the arc-shaped connecting plate. Multiple groups of screws are adapted to the multiple groups of connecting holes, and the movable semi-ring drives the screws to extend from the connecting holes into the bolt holes of the flange.

[0013] As an improvement to the above technical solution, a hydraulic oil pipe is provided on the arc-shaped mounting plate, a sealed valve is provided on the hydraulic oil pipe, and the hydraulic oil pipe is connected to the inner cavity of the hydraulic chamber; The arc-shaped mounting plate is provided with a detection pipe, and the detection pipe is communicated with the inner arc surface of the arc-shaped mounting plate.

[0014] A method for using a high-efficiency and energy-saving double-tube-sheet heat exchange device comprises the following steps: S10, Assembly: Assemble multiple groups of heat exchange pipes, four groups of tube sheets, and multiple groups of baffles, and install the baffles into the inner cavity of the shell so that two of the four groups of tube sheets are located at both ends of the shell; S20, Installation: Hoist a set of curved mounting plates to one side of the shell, and adjust the hoisting position of the curved mounting plates so that the tube sheet is placed between the mounting half ring and the pressing half ring, and the outer wall of the tube sheet contacts the inner wall of the curved mounting plates; S30, one-time fixation: Adjust the posture of the arc-shaped mounting plate so that the clamping block is initially aligned with the clamping groove, and use the driving component to move the clamping half ring toward the mounting half ring. Under the guidance of the tube sheet bevel and tube sheet groove, it completely enters the clamping groove for clamping, completing the fixing process once. S40, secondary fixation: In S30, when the pressing block is fully inserted into the pressing groove, the posture of the arc-shaped mounting plate is corrected so that the tube plate fixing hole and the installation fixing hole are aligned, and bolts are installed in the tube plate fixing hole and the installation fixing hole to complete the secondary fixing process; S50, three-time fixation: In S30, before the pressing block is fully inserted into the pressing groove, the pipe box is lifted and the flange on the pipe box is aligned with the arc-shaped connecting plate until the pressing block is fully inserted into the pressing groove. The moving half ring is synchronously displaced so that the screw is placed between the connecting hole and the bolt hole on the pipe box flange. Then, a nut that matches the screw is connected to the outer wall of the screw, completing the three-step fixing process. S60, reinstall: Repeat S20, S30, S40, and S50 to install another set of curved mounting plates on the side of the shell where the curved mounting plates were previously installed, so that the reinforcement connecting plates on the two sets of curved mounting plates are aligned, and the two sets of reinforcement connecting plates are fixed with connecting bolts to complete the tube sheet fixing process on one side of the shell; S70, Synchronous Installation: At the beginning of S20, S20, S30, S40, S50, and S60 are carried out simultaneously on the other side of the shell until the tube sheets on both sides of the shell are all fixed; S80, sealing detection: After S70 is completed, the entire water injection is tested for sealing. If the test fails, the unqualified area is disassembled and the unqualified parts are replaced.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The coordinated structure of the arc-shaped mounting plate, mounting half-ring, and clamping half-ring, combined with the clamping limiter of the drive assembly, achieves a non-welded, detachable connection between the tube sheet and the shell. Compared to the traditional method of welding the tube sheet and shell together, which requires cutting for maintenance or replacement, this solution allows for quick removal of the tube sheet for maintenance or replacement, significantly reducing maintenance costs and downtime. Four sets of tube sheets are placed at both ends of the shell to form a double-tube sheet structure. Combined with the wrap-around installation of two sets of curved mounting plates, a buffer isolation chamber is formed between adjacent tube sheets. This structure effectively disperses the stress impact caused by pressure fluctuations of the heat exchange medium and also serves as a leak monitoring buffer. When a leak occurs on any tube sheet, the medium is confined in the buffer chamber, preventing direct leakage to the external environment and cross contamination, significantly improving equipment safety and reliability. The modular design of the curved mounting plate, clamping half-ring, and drive assembly enables rapid, separate assembly and precise positioning of the tube sheet and shell. Compared to traditional welded tube sheets, which require on-site welding and are irreversible, this solution uses prefabricated curved mounting plate modules combined with the drive assembly clamping mechanism to quickly assemble the tube sheet without welding, improving assembly efficiency. The modular compression assembly of the arc-shaped mounting plate, hydraulic drive component and clamping half ring achieves mechanical clamping and fixation of the tube sheet, completely replacing the welding process. This process only requires a short period of energy 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, which can effectively shorten maintenance time compared to traditional welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the positions of the tube sheet and baffles of the present invention; Figure 3This is a schematic diagram of the positions of the arc-shaped mounting plate and the tube plate of the present invention; Figure 4 For the present invention Figure 3 Side view of Figure 5 For the present invention Figure 4 Cross-sectional view of AA; Figure 6 For the present invention Figure 3 Front view of Figure 7 For the present invention Figure 6 Cross-sectional view of the middle BB; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at C in the middle; Figure 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at D in the middle; Figure 10 is a cross-sectional view of the arc-shaped mounting plate of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at E in the middle; Figure 12 This is a schematic diagram of the positions of the arc-shaped mounting plate and the pressing half ring of the present invention; Figure 13 It is a structural schematic diagram of the arc-shaped mounting plate of the present invention; Figure 14 Schematic diagram of the structure of the tube plate of the present invention; Figure 15 For the present invention Figure 14 Schematic diagram of the enlarged structure at F in the middle; Figure 16 This is a schematic diagram of the positions of the moving half ring and the pressing half ring of the present invention.

[0017] In the figure: 10, pipe box; 11, first connecting pipe; 20, arc-shaped mounting plate; 21, detection pipe; 22, hydraulic oil pipe; 23, hydraulic cavity; 24, screw; 25, movable half ring; 26, mounting boss; 261, pressing hole; 262, driving groove; 263, movable groove; 27, mounting half ring; 28, arc-shaped connecting plate; 281, connecting hole; 282, reinforcement connecting plate; 29, mounting fixing hole; 30, housing; 31, first Two connecting pipes; 32. Heat exchange pipe; 33. Baffle; 40. Flange; 50. Tube sheet; 51. Tube sheet inclined surface; 52. Clamping groove; 53. Tube sheet fixing hole; 54. Tube sheet groove; 60. Drive assembly; 61. Drive block; 611. Moving block; 612. Drive sleeve; 6121. Drive end face; 613. Moving rod; 614. Moving plate; 62. Clamping rod; 70. Clamping half ring; 71. Clamping inclined surface; 72. Clamping block. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example: like Figure 1-16 As shown, this embodiment provides a high-efficiency and energy-saving double-tube sheet heat exchange device, including a shell 30, with tube boxes 10 provided at both ends of the shell 30, and two sets of tube sheets 50 provided between the tube box 10 and the shell 30; Two groups of arc-shaped mounting plates 20 are arranged between the pipe box 10 and the shell 30. Two groups of mounting semi-rings 27 are symmetrically arranged on the inner wall of the arc-shaped mounting plate 20. Two groups of clamping semi-rings 70 are also symmetrically arranged in the arc-shaped mounting plate 20. The two groups of clamping semi-rings 70 are adapted to the positions of the two groups of mounting semi-rings 27. A driving assembly 60 is also provided in the arc-shaped mounting plate 20. The driving assembly 60 cooperates with the two groups of clamping semi-rings 70 to drive the clamping semi-rings 70 to move toward the mounting semi-rings 27 to clamp and limit the tube sheet 50, so that the two groups of arc-shaped mounting plates 20 are completely wrapped on the tube sheet 50.

[0020] In this embodiment, when assembling the tube sheet 50, first, two of the four groups of tube sheets 50 are respectively located at both ends of the shell 30. Then, one group of arc-shaped mounting plates 20 is hoisted to one side of the shell 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 contacts the inner wall of the arc-shaped mounting plate 20. Then, the clamping half ring 70 is moved toward the mounting half ring 27 by the driving assembly 60, and the assembly steps of the upper arc-shaped mounting plate 20 are repeated so that the two groups of arc-shaped mounting plates 20 are completely wrapped on the tube sheet 50. At the same time, the arc-shaped mounting plates 20 are connected to the pipe box 10 and the shell 30. When the two groups of tube sheets 50 on one side of the shell 30 are installed, the above-mentioned assembly steps are performed synchronously on the other side of the shell 30, thereby completing the overall assembly steps and wrapping the tube sheet 50. The coordinated structure of the arc-shaped mounting plate 20, the mounting half ring 27, and the clamping half ring 70, in conjunction with the clamping limit of the drive assembly 60, achieves a non-welded, detachable connection between the tube sheet 50 and the shell 30. Compared to the conventional method of welding the tube sheet 50 and the shell 30 together, which requires cutting for maintenance or replacement, this solution allows for quick removal of the tube sheet 50 for maintenance or replacement, significantly reducing maintenance costs and downtime. Four sets of tube sheets 50 are placed at both ends of the shell 30 to form a double-tube sheet structure. Combined with the wrap-around installation of two sets of curved mounting plates 20, a buffer isolation chamber is formed between adjacent tube sheets 50. This structure effectively disperses the stress impact caused by pressure fluctuations of the heat exchange medium and also serves as a leak monitoring buffer. When any tube sheet 50 leaks, the medium is confined within the buffer chamber, preventing direct leakage to the external environment or cross contamination, significantly improving equipment safety and reliability. The modular design of the curved mounting plate 20, the clamping half ring 70, and the drive assembly 60 enables rapid, separate assembly and precise positioning of the tube sheet 50 and the shell 30. Compared to the traditional welded tube sheet process that requires on-site welding and is irreversible, this solution uses prefabricated curved mounting plate modules combined with the clamping mechanism of the drive assembly to quickly assemble the tube sheet 50 without welding, thereby improving assembly efficiency. The modular compression assembly of the arc-shaped mounting plate 20, the hydraulic drive assembly 60, and the compression half ring 70 achieves mechanical compression and fixation of the tube sheet 50, completely replacing the welding process. This process only requires a short period of energy 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 50, and the maintenance time can be effectively shortened compared to traditional welding.

[0021] Specifically, the pipe box 10 is provided with a first connecting pipe 11 with a communicating inner cavity, and the housing 30 is provided with two sets of second connecting pipes 31 with a communicating inner cavity; Multiple groups of heat exchange pipes 32 are arranged between the four groups of tube sheets 50, and multiple groups of baffles 33 are arranged between the multiple groups 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 33 is in contact with the inner wall of the shell 30 but not connected.

[0022] 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; Of course, the clearance design between the outer diameter of the tube sheet 50 and the inner diameter of the shell 30 (preferably the clearance value is 1.5%-2% of the wall thickness of the shell 30) can absorb the machining tolerances of the tube sheet 50 and the molding tolerances of the shell 30, thereby reducing the assembly accuracy requirements; The baffle 33 is installed without welding so that it can be disassembled as a whole along with the tube sheet 50 module, which facilitates quick cleaning or replacement of the baffle 33 and reduces downtime for maintenance.

[0023] Specifically, two groups of arc-shaped connecting plates 28 are symmetrically arranged on the arc-shaped mounting plate 20, and a reinforcement connecting plate 282 is arranged between the two groups of arc-shaped connecting plates 28; The pipe box 10 and the housing 30 are both provided with a flange 40 , and the flange 40 is connected to the arc-shaped connecting plate 28 ; The two groups of reinforcement connecting plates 282 are respectively arranged on the arc-shaped surfaces of the arc-shaped mounting plate 20, and the two groups of reinforcement connecting plates 282 are connected by bolts.

[0024] In this case, when the tube sheet 50 is placed on the arc-shaped mounting plate 20, a sealing gasket may be provided on the tube sheet 50 to improve the sealing performance; Of course, when connecting the flange 40 and the two sets of arc-shaped mounting plates 20, a sealing gasket can be added at the connection to improve the sealing performance; Of course, when connecting two sets of reinforced connecting plates 282, a sealing gasket can be added at the connection to improve the sealing performance.

[0025] In this embodiment, when the pipe box 10 or the housing 30 is connected to the arc-shaped mounting plate 20, the flange 40 on the pipe box 10 or the housing 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; Of course, after the two arc-shaped mounting plates 20 are aligned, the reinforcement 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 reinforcement connecting plates 282 to complete the modular assembly process.

[0026] Specifically, the arc-shaped mounting plate 20 is provided with a mounting protrusion 26 , the pressing half ring 70 contacts the mounting protrusion 26 , and a hydraulic cavity 23 is defined between the mounting protrusion 26 and the arc-shaped mounting plate 20 ; The driving assembly 60 includes two groups of driving blocks 61, which are symmetrically arranged in the hydraulic cavity 23. The driving blocks 61 are slidingly sealed with the inner wall of the hydraulic cavity 23. A clamping hole 261 is opened on the mounting protrusion 26, and a clamping rod 62 is slidingly sealed in the clamping hole 261. The clamping rod 62 is connected to the driving block 61 and the clamping half ring 70.

[0027] In this embodiment, when the tube sheet 50 is compressed, hydraulic oil is injected into the hydraulic cavity 23, so that the driving block 61 is displaced in the hydraulic cavity 23, thereby driving the compression rod 62 to displace in the compression hole 261, and driving the compression half ring 70 to displace toward the installation half ring 27 to compress the tube sheet 50.

[0028] Specifically, multiple groups of tube sheet fixing holes 53 are provided on the side wall of the tube sheet 50, and multiple groups of mounting fixing holes 29 are provided between the two groups of arc-shaped mounting plates 20. The positions of the multiple groups of mounting fixing holes 29 are adapted to the positions of the multiple groups of tube sheet fixing holes 53, and the tube sheet fixing holes 53 and the mounting fixing holes 29 are connected by bolts.

[0029] In this embodiment, after the tube sheet 50 is compressed, bolts are installed between the tube sheet fixing holes 53 and the mounting fixing holes 29 to further improve the stability of the connection between the tube sheet 50 and the arc-shaped mounting plate 20 .

[0030] Specifically, the tube sheet 50 is provided with a plurality of pressing grooves 52 , each of which is provided with a tube sheet inclined surface 51 , and each of which is provided with a plurality of tube sheet grooves 54 ; The clamping half ring 70 is provided with multiple groups of clamping blocks 72, and the multiple groups of clamping blocks 72 are respectively adapted to the multiple groups 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, guiding the clamping blocks 72 to fully enter the clamping grooves 52 for clamping and limiting, and correcting 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.

[0031] In this embodiment, when the pressing half ring 70 moves toward the installation half ring 27, the pressing block 72 can fully enter the pressing groove 52; After the compression block 72 is fully embedded in the compression groove 52, its side wall forms a surface contact constraint with the inner wall of the compression groove 52, effectively suppressing the circumferential micro-movement of the tube sheet 50 under fluid impact or thermal stress, avoiding the loosening of the bolt connection due to long-term vibration, ensuring the long-term stability of the sealing interface, and reducing the risk of leakage; The pressing bevel 71 of the pressing block 72 creates a guiding effect when in contact with the tube sheet bevel 51, forcing the pressing block 72 to slide precisely along the tube sheet groove 54 of the pressing groove 52, automatically correcting the radial offset and circumferential angle deviation between the tube sheet 50 and the arc-shaped mounting plate 20, thereby achieving alignment between the tube sheet fixing hole 53 and the mounting fixing hole 29. This eliminates the alignment problem of traditional bolt connections that require repeated manual adjustments, ensuring precise alignment between the tube sheet fixing hole 53 and the mounting fixing hole 29 without manual intervention. The inclined guide mechanism simplifies the multiple steps of "rough adjustment-fine adjustment-fixing" required for traditional tube sheet positioning into a one-time press-in action, shortening assembly time. Furthermore, the reversible withdrawal feature of the clamping block 72, i.e., the reverse action of the drive assembly 60, supports rapid disassembly and maintenance of the tube sheet 50, avoiding the replacement costs caused by cutting and damage to the traditional welded tube sheet 50. Of course, when disassembling the arc-shaped mounting plate 20, the arc-shaped mounting plate 20 is hoisted, and the clamping inclined surface 71 and the tube plate inclined surface 51 produce a component force guiding effect in the reverse displacement, and under the pressure relief of the hydraulic cavity 23, the driving block 61 retreats 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, so that the exit action of the clamping block 72 is dynamically decoupled from the hydraulic system, and separation can be completed by only hoisting mechanical pulling force, which can effectively reduce energy consumption compared with traditional hydraulic pushing disassembly.

[0032] Of course, when hoisting the arc-shaped mounting plates 20, the hoisting and disassembly processes are performed on the upper and lower groups of arc-shaped mounting plates 20 respectively. When hoisting and disassembling the upper group of arc-shaped mounting plates 20, they can be directly hoisted to separate them. When hoisting and disassembling the lower group of arc-shaped mounting plates 20, a downward pulling force is first applied to the arc-shaped mounting plates 20 through a winch. After the arc-shaped mounting plates 20 are separated, hoisting is performed.

[0033] Specifically, the driving block 61 is provided with multiple sets of driving sleeves 612 , and the driving sleeves 612 are in communication with the hydraulic cavity 23 ; The arc-shaped mounting plate 20 is provided with a plurality of driving grooves 262, the driving sleeve 612 is slidingly and sealably arranged in the driving groove 262, a moving groove 263 is provided on the driving groove 262, a moving rod 613 is provided in the driving sleeve 612, a moving block 611 is provided on the moving rod 613, the moving block 611 is slidingly and sealably matched with the inner cavity of the driving sleeve 612, a driving end face 6121 is provided on the driving end face 6121, a driving through hole is provided on the driving through hole, and the moving rod 613 is slidingly arranged in the driving through hole.

[0034] Specifically, a moving plate 614 is provided on the moving rod 613, and the moving plate 614 is slidably provided in the moving groove 263; A movable semi-ring 25 is arranged between multiple groups of movable plates 614, and the inner wall of the movable semi-ring 25 is in contact with the outer wall of the arc-shaped mounting plate 20 but not connected. Multiple groups of screws 24 are arranged on the movable semi-ring 25, and multiple groups of connecting holes 281 are opened on the arc-shaped connecting plate 28. Multiple groups of screws 24 are adapted to multiple groups of connecting holes 281, and the movable semi-ring 25 drives the screws 24 to extend from the connecting holes 281 into the bolt holes of the flange 40.

[0035] In this case, a nut is provided on the outer threaded sleeve of the screw rod 24 (not shown in the drawing).

[0036] In this embodiment, when the pressing half ring 70 is displaced toward the mounting half ring 27, the hydraulic oil in the hydraulic cavity 23 simultaneously enters the inner cavity of the driving sleeve 612, causing the moving rod 613 to be displaced, thereby causing the moving half ring 25 to be displaced toward the arc-shaped mounting plate 20, until the moving half ring 25 contacts the arc-shaped mounting plate 20, thereby allowing the screw rod 24 to extend from the connecting hole 281 into the bolt hole of the flange 40, and then a matching nut is connected to the outer wall of the screw rod 24, completing the connection process between the flange 40 and the arc-shaped connecting plate 28, that is, completing the connection process between the flange 40 and the arc-shaped mounting plate 20; The hydraulic oil drives the inner cavity of the driving sleeve 612 to move the rod 613 axially, driving 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, integrating the traditional step-by-step mechanical pressing and bolt tightening into a single hydraulic action, greatly shortening the assembly time and improving the installation efficiency. The moving rod 613 is rigidly connected to the moving half ring 25 through the moving plate 614 to form a multi-point drive mechanism. Under the action of hydraulic pressure, each screw 24 is forced to accurately guide along the moving groove 263, automatically aligning the connection hole 281 with the flange bolt hole position, eliminating manual alignment errors, ensuring the coaxiality of the connection hole 281 and the flange hole, and improving assembly accuracy. During hydraulic unloading, the movable rod 613 can be reversed and driven to disengage the screw 24 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, facilitating the overall replacement of the tube sheet 50 and flange assembly during maintenance, reducing maintenance complexity. Furthermore, a single hydraulic power source is used to simultaneously complete the dual processes of clamping and flange connection, replacing the traditional step-by-step mechanical fastening or welding process, reducing energy conversion links and significantly reducing assembly energy consumption. Furthermore, structural integration reduces the number of components and improves device reliability. Of course, the tightening of the screw 24 and the nut forms an axial mechanical pre-tightening force, which is transmitted in reverse to the drive sleeve 612 and the drive block 61 through the moving rod 613, and is converted into an additional radial pressing 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 to form a bidirectional 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 hydraulic system causes the clamping force to drop due to leakage or pressure fluctuations, the mechanical pre-tightening force can still maintain the constraint of the clamping block 72 on the tube sheet 50 to avoid sealing failure. This redundant design greatly improves the safety margin of the equipment under extreme working conditions and reduces the risk of accidental leakage.

[0037] Specifically, a hydraulic oil pipe 22 is provided on the arc-shaped mounting plate 20 , a sealed valve is provided on the hydraulic oil pipe 22 , and the hydraulic oil pipe 22 is communicated with the inner cavity of the hydraulic cavity 23 ; The arc-shaped mounting plate 20 is provided with a detection pipe 21 , and the detection pipe 21 is communicated with the inner arc surface of the arc-shaped mounting plate 20 .

[0038] In this embodiment, the hydraulic oil pipe 22 is provided to facilitate the injection or suction of hydraulic oil into the hydraulic cavity 23, and the detection pipe 21 is provided to detect the interior of the annular structure formed by the combination of the two groups of arc-shaped mounting plates 20, so that the machine can be shut down for maintenance in a timely manner when leakage occurs.

[0039] A high-efficiency and energy-saving double-tube sheet heat exchange device is easy to use and includes the following steps: S10, Assembly: Assemble multiple sets of heat exchange pipes 32, four sets of tube sheets 50, and multiple sets of baffles 33, and install the baffles 33 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; S20, Installation: Hoist a set of curved mounting plates 20 to one side of the shell 30 and adjust the hoisting position of the curved mounting plates 20 so that the tube sheet 50 is placed between the mounting half ring 27 and the pressing half ring 70, and the outer wall of the tube sheet 50 contacts the inner wall of the curved mounting plates 20; S30, one-time fixation: Adjust the posture of the arc-shaped mounting plate 20 so that the pressing block 72 is preliminarily aligned with the pressing groove 52, and use the driving assembly 60 to move the pressing half ring 70 toward the mounting half ring 27. Under the guidance of the tube sheet inclined surface 51 and the tube sheet groove 54, the pressing half ring 70 completely enters the pressing groove 52 for pressing, completing the fixing process. S40, secondary fixation: In S30, when the pressing block 72 is fully inserted into the pressing groove 52, the posture of the arc-shaped mounting plate 20 is corrected so that the tube plate fixing hole 53 and the installation fixing hole 29 are aligned, and bolts are installed in the tube plate fixing hole 53 and the installation fixing hole 29 to complete the secondary fixing process; S50, three-time fixation: In S30, before the pressing block 72 is fully inserted into the pressing groove 52, the pipe box 10 is lifted and the flange 40 on the pipe box 10 is aligned with the arc-shaped connecting plate 28 until the pressing block 72 is fully inserted into the pressing groove 52. The movable half ring 25 is synchronously displaced so that the screw rod 24 is positioned between the connecting hole 281 and the bolt hole on the flange 40 of the pipe box 10. Then, a nut matching the screw rod 24 is connected to the outer wall of the screw rod 24, completing the three-step fixing process. S60, reinstall: Repeat S20, S30, S40, and S50 to install another set of curved mounting plates 20 on the side of the shell 30 where the curved mounting plates 20 were previously installed, so that the reinforcing connecting plates 282 on the two sets of curved mounting plates 20 are aligned, and the two sets of reinforcing connecting plates 282 are connected with bolts to fix them, completing the tube sheet 50 fixing process on one side of the shell 30; S70, Synchronous Installation: At the beginning of S20, S20, S30, S40, S50, and S60 are performed simultaneously on the other side of the shell 30 until the tube sheets 50 on both sides of the shell 30 are all fixed. S80, sealing detection: After S70 is completed, the entire water injection is tested for sealing. If the test fails, the unqualified area is disassembled and the unqualified parts are replaced.

[0040] In this embodiment, a three-level progressive constraint is formed by the hydraulic pressure guidance of the primary fixation S30, the bolt hole alignment locking of the secondary fixation S40, and the flange connection pre-tightening of the tertiary fixation S50. This optimizes the contact pressure between the pressing block 72 and the pressing 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, thereby eliminating stress concentration or assembly deviation caused by a single fixation, ensuring uniform force on each sealing interface, and significantly reducing the risk of micro-leakage on the interface during operation. In the synchronous installation step S70, the tube sheets 50 on both sides of the shell 30 are fixed in parallel. By sharing the hydraulic drive system and standardizing the lifting process, the traditional serial assembly mode is optimized to a parallel operation, which shortens the installation time of the tube sheets 50 on both sides, improves the overall assembly efficiency, and significantly reduces the equipment downtime and installation period. Each fixing step S30-S50 adopts a non-welding mechanical connection method, combined with the local disassembly and replacement mechanism after the sealing test S80, so that 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 welding structure, and no destructive cutting is required, which reduces the cost of spare parts replacement.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving double-tube-sheet heat exchange device, characterized by: It comprises a shell (30), with tube boxes (10) provided at both ends of the shell (30), and two sets of tube sheets (50) provided between the tube box (10) and the shell (30); Two groups of arc-shaped mounting plates (20) are arranged between the pipe box (10) and the shell (30), and two groups of mounting semi-rings (27) are symmetrically arranged on the inner wall of the arc-shaped mounting plate (20). Two groups of clamping semi-rings (70) are also symmetrically arranged in the arc-shaped mounting plate (20), and the positions of the two groups of clamping semi-rings (70) are adapted to the positions of the two groups of mounting semi-rings (27). A driving component (60) is also arranged in the arc-shaped mounting plate (20), and the driving component (60) cooperates with the two groups of clamping semi-rings (70) to drive the clamping semi-rings (70) to move toward the mounting semi-rings (27) to clamp and limit the tube sheet (50), so that the two groups of arc-shaped mounting plates (20) are completely wrapped on the tube sheet (50).

2. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 1, characterized in that: The pipe box (10) is provided with a first connecting pipe (11) whose inner cavities are in communication, and the housing (30) is provided with two groups of second connecting pipes (31) whose inner cavities are in communication; Multiple groups of heat exchange pipes (32) are arranged between the four groups of tube sheets (50), and multiple groups of baffles (33) are arranged between the multiple groups 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 (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 exchange device according to claim 1, characterized in that: Two groups of arc-shaped connecting plates (28) are symmetrically arranged on the arc-shaped mounting plate (20), and a reinforcement connecting plate (282) is arranged between the two groups of arc-shaped connecting plates (28); The pipe box (10) and the housing (30) are both provided with a flange (40), and the flange (40) is connected to the arc-shaped connecting plate (28); The two groups of reinforcement connection plates (282) are respectively arranged on the arc-shaped surface of the arc-shaped mounting plate (20), and the two groups of reinforcement connection plates (282) are connected by bolts.

4. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 3, characterized in that: The arc-shaped mounting plate (20) is provided with a mounting protrusion (26), the pressing 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 driving assembly (60) includes two groups of driving blocks (61), and the two groups of driving blocks (61) are symmetrically arranged in the hydraulic cavity (23). The driving blocks (61) are slidingly sealed with the inner wall of the hydraulic cavity (23). A clamping hole (261) is opened on the mounting protrusion (26), and a clamping rod (62) is slidingly sealed in the clamping hole (261). The clamping rod (62) is connected to the driving block (61) and the clamping half ring (70).

5. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 4, characterized in that: Multiple groups of tube sheet fixing holes (53) are provided on the side wall of the tube sheet (50), and multiple groups of mounting fixing holes (29) are provided between the two groups of arc-shaped mounting plates (20). The positions of the multiple groups of mounting fixing holes (29) are adapted to the positions of the multiple groups of tube sheet fixing holes (53), and the tube sheet fixing holes (53) and the mounting fixing holes (29) are connected by bolts.

6. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 5, characterized in that: The tube sheet (50) is provided with a plurality of pressing grooves (52), the pressing grooves (52) are provided with tube sheet inclined surfaces (51), and the pressing grooves (52) are provided with a plurality of tube sheet grooves (54); The clamping half ring (70) is provided with a plurality of clamping blocks (72), and the plurality of clamping blocks (72) are respectively matched with the plurality of clamping grooves (52). The clamping blocks (72) are provided with a clamping inclined surface (71), and the clamping inclined surface (71) contacts the tube plate inclined surface (51), guiding the clamping blocks (72) to fully enter the clamping groove (52) for clamping and limiting, and correcting the positions of the tube plate (50) and the arc-shaped mounting plate (20), so that the tube plate fixing hole (53) and the mounting fixing hole (29) are aligned.

7. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 6, characterized in that: The driving block (61) is provided with a plurality of driving sleeves (612), and the driving sleeves (612) are in communication with the hydraulic cavity (23); The arc-shaped mounting plate (20) is provided with a plurality of driving grooves (262), the driving sleeve (612) is slidingly and sealingly arranged in the driving groove (262), the driving groove (262) is provided with a moving groove (263), a moving rod (613) is provided in the driving sleeve (612), a moving block (611) is provided on the moving rod (613), the moving block (611) is slidingly and sealingly matched with the inner cavity of the driving sleeve (612), a driving end face (6121) is provided on the driving end face (6121), a driving through hole is provided, and the moving rod (613) is slidingly arranged in the driving through hole.

8. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 7, 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 the plurality of movable plates (614), the inner wall of the movable semi-ring (25) is in contact with the outer wall of the arc-shaped mounting plate (20) but is not connected thereto, a plurality of screw rods (24) are provided on the movable semi-ring (25), a plurality of connecting holes (281) are provided on the arc-shaped connecting plate (28), the plurality of screw rods (24) are adapted to the plurality of connecting holes (281), and the movable semi-ring (25) drives the screw rods (24) to extend from the connecting holes (281) into the bolt holes of the flange (40).

9. The high-efficiency and energy-saving double-tube-sheet heat exchange device according to claim 1, characterized in that: A hydraulic oil pipe (22) is provided on the arc-shaped mounting plate (20), a sealed valve is provided on the hydraulic oil pipe (22), and the hydraulic oil pipe (22) is in communication with the inner cavity of the hydraulic cavity (23); A detection pipe (21) is provided on the arc-shaped mounting plate (20), and the detection pipe (21) is communicated with the inner arc surface of the arc-shaped mounting plate (20).

10. A method for using a high-efficiency and energy-saving double-tube-sheet heat exchanger according to any one of claims 1 to 9, characterized in that: The following steps are involved: S10, Assembly: Assembling a plurality of heat exchange pipes (32), four sets of tube sheets (50), and a plurality of baffles (33), and assembling the baffles (33) into the inner cavity of the shell (30), so that two of the four sets of tube sheets (50) are located at two ends of the shell (30); S20, Installation: Hoisting a set of arc-shaped mounting plates (20) to one side of the shell (30), and adjusting the hoisting position of the arc-shaped mounting plates (20) so that the tube sheet (50) is placed between the mounting half ring (27) and the pressing half ring (70), and the outer wall of the tube sheet (50) contacts the inner wall of the arc-shaped mounting plates (20); S30, one-time fixation: Adjust the posture of the arc-shaped mounting plate (20) so that the pressing block (72) is preliminarily aligned with the pressing groove (52), and the driving assembly (60) is used to displace the pressing half ring (70) toward the mounting half ring (27). Under the guidance of the tube plate inclined surface (51) and the tube plate groove (54), the pressing block (70) is completely inserted into the pressing groove (52) for pressing, thereby completing a fixing process. S40, secondary fixation: In S30, when the pressing block (72) is fully inserted into the pressing groove (52), the posture of the arc-shaped mounting plate (20) is corrected so that the tube plate fixing hole (53) and the installation fixing hole (29) are aligned, and bolts are installed in the tube plate fixing hole (53) and the installation fixing hole (29), completing the secondary fixing process; S50, three-time fixation: In S30, before the pressing block (72) is fully inserted into the pressing groove (52), the pipe box (10) is lifted and the flange (40) on the pipe box (10) is aligned with the arc-shaped connecting plate (28) until the pressing block (72) is fully inserted into the pressing groove (52), and the moving half ring (25) is synchronously displaced so that the screw rod (24) is placed between the connecting hole (281) and the bolt hole on the flange (40) of the pipe box (10), and then a nut matching the screw rod (24) is connected to the outer wall of the screw rod (24), completing the three fixing processes; S60, reinstall: Repeat S20, S30, S40, and S50 to install another set of curved mounting plates (20) on the side of the shell (30) where the curved mounting plates (20) were previously installed, so that the reinforcing connecting plates (282) on the two sets of curved mounting plates (20) are aligned, and the two sets of reinforcing connecting plates (282) are fixed with connecting bolts to complete the tube plate (50) fixing process on one side of the shell (30); S70, Synchronous Installation: At the beginning of S20, S20, S30, S40, S50, and S60 are simultaneously performed on the other side of the shell (30) until the tube sheets (50) on both sides of the shell (30) are all fixed; S80, sealing detection: After S70 is completed, the entire water injection is tested for sealing. If the test fails, the unqualified area is disassembled and the unqualified parts are replaced.

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