Fixed tube sheet heat exchanger

Abstract

The application discloses a fixed tube plate type heat exchanger, and relates to the technical field of energy-saving heat exchange devices, which comprises a first connecting cylinder, a heat exchange shell and a second connecting cylinder, wherein the first connecting cylinder and the second connecting cylinder are respectively arranged at two ends of the heat exchange shell, and further comprises a mounting mechanism and an adjusting mechanism. The heat exchanger can be quickly assembled and disassembled, the length of the heat exchanger can be adjusted by mounting different numbers of second connecting shells, the positioning operation of the baffle plate can be directly completed through the second connecting shells, the heat exchanger manufacturer does not need to customize heat exchange shells with multiple different lengths, and only needs to assemble the heat exchange shells according to requirements, so that the production needs of heat exchangers with different length specifications can be met, and the production cost is reduced while energy is saved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat exchange device technology, specifically a fixed tube sheet heat exchanger. Background Technology

[0002] In fixed tubesheet heat exchangers, the spaced tubes and baffles work synergistically to optimize fluid distribution and structural stability, jointly improving equipment performance and reliability. Baffles increase turbulence by altering the flow direction of the shell-side fluid, thereby enhancing the heat transfer coefficient. Spaced tubes, typically used with tie rods, fix the baffles or support plates in designated positions, functioning similarly to "spacer sleeves" to ensure precise spacing between baffles and prevent displacement or deformation of the tube bundle due to fluid impact or vibration. Fixed tubesheet heat exchangers employ a tight fit between the tube sheet and pipes, allowing direct heat exchange between the tube-side and shell-side fluids through the tube walls, reducing intermediate heat transfer stages. Some designs utilize corrugated or spiral tube structures to increase the heat transfer area, improving the heat transfer coefficient by more than 30% compared to traditional heat exchangers, thus reducing energy consumption under the same heat load. Their structural characteristics minimize bypass seepage, resulting in more uniform fluid distribution within the shell side, avoiding localized short-circuiting, and ensuring sufficient heat exchange. In practical applications, thermal efficiency can reach 60%-95%, significantly higher than traditional shell-and-tube heat exchangers.

[0003] During the use of heat exchangers, different lengths of heat exchangers are required depending on the heat exchange demand and flow rate. However, when the length of the heat exchanger shell is fixed, it is difficult to adapt to different usage requirements. In order to meet different customer needs, manufacturers need to customize a variety of heat exchanger shells of different lengths and reinforce them with different numbers of baffles. This not only increases manufacturing costs but also increases energy consumption, resulting in waste.

[0004] To facilitate the adjustment of the heat exchanger's length and thus improve its versatility and energy efficiency, a fixed tube sheet heat exchanger is provided. Summary of the Invention

[0005] The purpose of this invention is to provide a fixed tube sheet heat exchanger so as to facilitate the adjustment of the length of the heat exchanger.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fixed tubesheet heat exchanger, comprising a first connecting cylinder, a heat exchange shell, and a second connecting cylinder. The first and second connecting cylinders are respectively located at both ends of the heat exchange shell. The heat exchange shell is composed of a first connecting shell, a third connecting shell, and multiple second connecting shells. The first and third connecting shells are respectively located at both ends of the second connecting shell. A tube-side inlet is fixedly connected to the outer wall of the first connecting cylinder, and a tube-side outlet is fixedly connected to the outer wall of the second connecting cylinder. A shell-side inlet is fixedly connected to the bottom end of the first connecting shell, and a shell-side outlet is fixedly connected to the bottom end of the third connecting shell. A baffle is fixedly connected to one end of both the first and third connecting shells. Baffles are installed at both ends of the second connecting shell. Heat exchange tubes are installed between the two baffles. The first connecting cylinder and the first connecting shell are connected to the third and second connecting cylinders via connecting flanges. The second connecting shell and the baffles are installed via an installation mechanism, and the heat exchange tubes are installed via an adjustment mechanism.

[0007] The installation mechanism includes a first docking ring and a second docking ring. The first docking ring is fixedly connected to one end of the second connecting shell and the third connecting shell. The second docking ring is fixedly connected to the other end of the second connecting shell and the first connecting shell. A rotating ring is rotatably connected to the outer wall of the second docking ring. An arc-shaped plate is fixedly connected to the outer wall of the rotating ring. A positioning plate is fixedly connected to the outer wall of the arc-shaped plate. An arc-shaped groove is formed on the outer wall of the second docking ring. A positioning groove is formed on the inner wall of the arc-shaped groove. A reinforcing groove is formed at one end of the positioning plate.

[0008] As a further embodiment of the present invention: the installation mechanism further includes a vertical plate, which is fixedly connected to the top end of the first connecting shell. A first horizontal bar passing through the second docking ring is slidably connected inside the vertical plate. A push plate is fixedly connected to the top end of the first horizontal bar. A first spring is connected between the vertical plate and the push plate. A second horizontal bar passing through the first and second docking rings is slidably connected to the top end of the second connecting shell. A reinforcing rod is fixedly connected to the top end of the second horizontal bar. A third horizontal bar extending to one end of the third connecting shell is slidably connected to the top end of the third connecting shell. Installation grooves are provided at the ends of the first and third connecting shells that are close to each other and at both ends of the second connecting shell. A locking block is symmetrically fixedly connected to the inner wall of the installation groove. A positioning ring is fixedly connected to the outer wall of the baffle plate. A locking groove is provided on the outer wall of the positioning ring.

[0009] As a further embodiment of the present invention: the adjustment mechanism includes a connection hole, the connection hole is opened on the outer wall of the partition, the outer wall of the baffle is provided with an insertion hole, the heat exchange tube is composed of two mounting tubes and multiple connecting tubes, one end of one mounting tube and one connecting tube is fixedly connected with a threaded post, and the other end of the other mounting tube and one connecting tube is provided with a threaded groove.

[0010] As a further embodiment of the present invention: the adjustment mechanism further includes a mounting ring, which is mounted on the outer wall of the mounting tube. The outer wall of the mounting tube has an annular groove. A fixing block extending into the inner cavity of the mounting ring is symmetrically slidably connected inside the mounting ring. A second spring is connected between the fixing block and the mounting ring. A spur gear is rotatably connected inside the mounting ring to the outer wall of the fixing block. A rotating rod is fixedly connected to the outer wall of the spur gear.

[0011] As a further embodiment of the present invention: the outer wall of the positioning ring is in contact with the inner wall of the mounting groove, and the outer wall of the card block is in contact with the inner wall of the card groove.

[0012] As a further embodiment of the present invention: the inner wall of the arc-shaped groove is fitted with the outer wall of the arc-shaped plate, and the inner wall of the positioning groove is fitted with the outer wall of the positioning plate.

[0013] As a further embodiment of the present invention: the inner wall of the reinforcing groove is in contact with the outer wall of the reinforcing rod.

[0014] As a further aspect of the present invention: the threaded post is matched with the threaded groove.

[0015] As a further embodiment of the present invention: the outer wall of the fixing block is provided with a toothed groove, which meshes with the spur gear.

[0016] As a further embodiment of the present invention: the inner wall of the mounting ring is in contact with the outer wall of the mounting tube, and the inner wall of the annular groove is in contact with the outer wall of one end of the fixing block.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. By setting up an installation mechanism, the baffles are positioned at both ends of the second connecting shell; the first, second, and third connecting shells are connected; the heat exchange tubes are installed by adjusting the parts within the mechanism; then the first and second connecting cylinders are installed through connecting flanges, fixing the first connecting cylinder to the first connecting shell and the third connecting shell to the second connecting cylinder, facilitating quick assembly and disassembly of the heat exchanger. Furthermore, the length of the heat exchanger can be adjusted by installing different numbers of second connecting shells, eliminating the need for additional spacer tubes and allowing direct positioning of the baffles through the second connecting shells.

[0019] 2. By setting an adjustment mechanism, the threaded column is threaded into the threaded groove to install the mounting tube and connecting tube. The heat exchange tube is passed through the connecting hole and the insertion hole in sequence. The rotating rod is rotated, and the fixing block is displaced into the interior of the mounting ring. Then, the mounting ring is sleeved on the mounting tube, and the fixing block is engaged in the annular groove to fix the mounting ring to the outer wall of the mounting tube. The two mounting rings clamp the heat exchange tube between the two partitions, which facilitates the quick installation and disassembly of the heat exchange tube. At the same time, the length of the heat exchange tube can be adjusted by using different numbers of connecting tubes to adapt to heat exchangers of different lengths.

[0020] This eliminates the need for heat exchanger manufacturers to customize heat exchanger shells of various lengths. They can simply assemble them according to requirements to meet the production needs of heat exchangers of different lengths and specifications, thereby reducing production costs and saving energy. This makes it suitable for widespread adoption in the industry. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation of the heat exchange tube of the present invention;

[0023] Figure 3 This is a cross-sectional view of the heat exchange shell of the present invention;

[0024] Figure 4 This is a schematic diagram of the installation of the first connecting shell of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the second connecting shell of the present invention;

[0026] Figure 6 This is a schematic diagram of the mounting ring structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation of the third connecting shell of the present invention;

[0028] Figure 8 This is a schematic diagram of the heat exchange tube of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the connecting tube of the present invention;

[0030] Figure 10 This is a schematic diagram of the mounting ring structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the internal structure of the mounting ring of the present invention.

[0032] In the diagram: 1. First connecting cylinder; 2. First connecting shell; 3. Second connecting shell; 4. Third connecting shell; 5. Second connecting cylinder; 6. Pipe-side inlet; 7. Pipe-side outlet; 8. Installation mechanism; 801. First docking ring; 802. Second docking ring; 803. Rotating ring; 804. Arc plate; 805. Positioning plate; 806. Arc groove; 807. Positioning groove; 808. Reinforcing groove; 809. Vertical plate; 810. First horizontal bar; 811. Push plate; 812. First spring; 813. Second horizontal bar; 814. Reinforcing 815. Rod; 816. Third crossbar; 817. Mounting groove; 818. Locking block; 819. Positioning ring; 810. Locking groove; 911. Adjustment mechanism; 902. Connecting hole; 903. Mounting tube; 904. Connecting tube; 905. Threaded column; 906. Threaded groove; 907. Mounting ring; 908. Annular groove; 909. Fixing block; 910. Second spring; 911. Spur gear; 912. Rotating rod; 10. Shell-side inlet; 11. Shell-side outlet; 12. Partition plate; 13. Baffle plate; 14. Heat exchange tube. Detailed Implementation

[0033] 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.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0035] Please see Figures 1 to 11 In this embodiment of the invention, a fixed tube sheet heat exchanger includes a first connecting cylinder 1, a heat exchange shell, and a second connecting cylinder 5. The first connecting cylinder 1 and the second connecting cylinder 5 are located at opposite ends of the heat exchange shell. The heat exchange shell is composed of a first connecting shell 2, a third connecting shell 4, and multiple second connecting shells 3. The first connecting shell 2 and the third connecting shell 4 are located at opposite ends of the second connecting shells 3. A tube-side inlet 6 is fixedly connected to the outer wall of the first connecting cylinder 1, and a tube-side outlet 7 is fixedly connected to the outer wall of the second connecting cylinder 5. A tube-side outlet 7 is fixedly connected to the bottom end of the first connecting shell 2. Shell-side inlet 10, shell-side outlet 11 fixedly connected to the bottom of the third connecting shell 4, baffle 12 fixedly connected to one end of the first connecting shell 2 and the third connecting shell 4, baffles 13 installed at both ends of the second connecting shell 3, heat exchange tube 14 installed between the two baffles 12, the first connecting cylinder 1 and the first connecting shell 2 connected to the third connecting shell 4 and the second connecting cylinder 5 are all connected by connecting flanges, the second connecting shell 3 and the baffle 13 are installed by the installation mechanism 8, and the heat exchange tube 14 is installed by the adjustment mechanism 9.

[0036] In this embodiment: water enters the first connecting cylinder 1 through the tube side inlet 6, then enters the second connecting cylinder 5 through the heat exchange tube 14, and is discharged through the tube side outlet 7; fluid enters the first connecting shell 2 through the shell side inlet 10, passes through the first connecting shell 2, the second connecting shell 3 and the third connecting shell 4 and is discharged through the shell side outlet 11. The baffle plate 13 is used to guide the flow of fluid, and the fluid exchanges heat with the water in the heat exchange tube 14 during the movement.

[0037] Please refer to this carefully. Figures 2 to 7 The installation mechanism 8 includes a first docking ring 801 and a second docking ring 802. The first docking ring 801 is fixedly connected to one end of the second connecting shell 3 and the third connecting shell 4, and the second docking ring 802 is fixedly connected to the other end of the second connecting shell 3 and the first connecting shell 2. A rotating ring 803 is rotatably connected to the outer wall of the second docking ring 802. An arc-shaped plate 804 is fixedly connected to the outer wall of the rotating ring 803, and a positioning plate 805 is fixedly connected to the outer wall of the arc-shaped plate 804. An arc-shaped groove 806 is formed on the outer wall of the second docking ring 802, and a positioning groove 807 is formed on the inner wall of the arc-shaped groove 806. A reinforcing groove 808 is formed at one end of the positioning plate 805. The installation mechanism 8 also includes a vertical plate 809, which is fixedly connected to the top of the first connecting shell 2. A through-hole is slidably connected inside the vertical plate 809. The first horizontal bar 810 of the second docking ring 802 is fixedly connected to the top of the first horizontal bar 810. A first spring 812 is connected between the vertical plate 809 and the push plate 811. The top of the second connecting shell 3 is slidably connected to the second horizontal bar 813 that passes through the first docking ring 801 and the second docking ring 802. The top of the second horizontal bar 813 is fixedly connected to the reinforcing rod 814. The top of the third connecting shell 4 is slidably connected to the third horizontal bar 815 that extends to one end of the third connecting shell 4. The ends of the first connecting shell 2 and the third connecting shell 4 that are close to each other and the two ends of the second connecting shell 3 are provided with mounting grooves 816. The inner walls of the mounting grooves 816 are symmetrically fixedly connected to the locking blocks 817. The outer wall of the baffle plate 13 is fixedly connected to the positioning ring 818. The outer wall of the positioning ring 818 is provided with a locking groove 819.

[0038] In this embodiment: when installing the baffle plate 13, the baffle plate 13 is placed at both ends of the second connecting shell 3, the positioning ring 818 is connected into the mounting groove 816, and the locking block 817 is engaged into the locking groove 819 to complete the positioning of the baffle plate 13 in the direction.

[0039] Next, the heat exchange shell is installed. When connecting the first connecting shell 2, the second connecting shell 3, and the third connecting shell 4, the first mating ring 801 and the second mating ring 802 are brought together. The positioning plate 805 passes through the second mating ring 802 along the positioning groove 807. At the same time, the arc plate 804 moves into the arc groove 806. After completion, the rotating ring 803 is rotated. The rotation of the rotating ring 803 causes the arc plate 804 to slide along the arc groove 806. The displacement of the arc plate 804 causes the positioning plate 805 to move to the end away from the positioning groove 807. At this time, the positioning plate 805 and the rotating ring 803 clamp the first mating ring 801 and the second mating ring 802 together. After multiple operations, the connection operation between the first connecting shell 2, the second connecting shell 3, and the third connecting shell 4 is completed.

[0040] Then, the heat exchange tube 14 is installed by adjusting the parts within the adjustment mechanism 9. Next, the first connecting cylinder 1 and the second connecting cylinder 5 are installed via the connecting flange. The first connecting cylinder 1 is fixedly connected to the first connecting shell 2, and the third connecting shell 4 is fixedly connected to the second connecting cylinder 5. When the third connecting shell 4 and the second connecting cylinder 5 are connected, the second connecting cylinder 5 contacts the third crossbar 815, pushing the third crossbar 815 to move. The displacement of the third crossbar 815 pushes multiple second crossbars 813 to move synchronously. The displacement of the second crossbars 813 drives the reinforcing rod 814 to move. The displacement is inserted into the reinforcing groove 808 to fix the position of the positioning plate 805, thereby reinforcing the first connecting shell 2, the second connecting shell 3 and the third connecting shell 4. At the same time, the displacement of the second crossbar 813 pushes the first crossbar 810 and the push plate 811 to move, causing compression of the first spring 812, thereby completing the assembly of the heat exchanger. This facilitates the quick assembly and disassembly of the heat exchanger. At the same time, the length of the heat exchanger can be adjusted by installing different numbers of second connecting shells 3. There is no need to install additional spacer tubes. The positioning operation of the baffle plate 13 can be completed directly through the second connecting shells 3.

[0041] When disassembling the heat exchanger, the first connecting cylinder 1 and the second connecting cylinder 5 are removed through the connecting flange. At this time, the first crossbar 810 and the push plate 811 are reset by the elastic force of the first spring 812. The first crossbar 810 pushes the second crossbar 813 to be displaced and reset. The displacement of the second crossbar 813 causes the reinforcing rod 814 to be displaced out of the reinforcing groove 808, thus removing the fixation of the positioning plate 805. Rotating the rotating ring 803 causes the arc plate 804 and the positioning plate 805 to be displaced. The positioning plate 805 is displaced to the position of the positioning groove 807, so that the positioning plate 805 can slide along the positioning groove 807 to separate the first docking ring 801 and the second docking ring 802, thereby enabling a quick disassembly operation of the heat exchanger.

[0042] Please refer to this carefully. Figures 6 to 11The adjusting mechanism 9 includes a connecting hole 901, which is located on the outer wall of the partition plate 12. The outer wall of the baffle plate 13 has an insertion hole 902. The heat exchange tube 14 is composed of two mounting tubes 903 and multiple connecting tubes 904. One end of each mounting tube 903 and connecting tube 904 is fixedly connected to a threaded post 905. The other end of each mounting tube 903 and connecting tube 904 has a threaded groove 906. The adjusting mechanism 9 also includes a mounting ring 907, which is mounted on the outer wall of the mounting tube 903. The outer wall of the mounting tube 903 has an annular groove 908. The mounting ring 907 is symmetrically slidably connected to a fixing block 909 extending into the inner cavity of the mounting ring 907. A second spring 910 is connected between the fixing block 909 and the mounting ring 907. The mounting ring 907 is rotatably connected to a spur gear 911 located on the outer wall of the fixing block 909. The outer wall of the spur gear 911 is fixedly connected to a rotating rod 912.

[0043] In this embodiment: when installing the connecting pipe 904 and the mounting pipe 903, the threaded post 905 is threaded into the threaded groove 906, and the mounting pipe 903 and the connecting pipe 904 are installed so that the mounting pipe 903 is located at both ends of the connecting pipe 904. By using different numbers of connecting pipes 904, the length of the heat exchange tube 14 can be adjusted.

[0044] When installing the heat exchange tube 14, the heat exchange tube 14 is passed through the connecting hole 901 and the insertion hole 902 in sequence. The rotating rod 912 is rotated, which drives the spur gear 911 to rotate. The rotation of the spur gear 911 drives the fixed block 909 to move, which compresses the second spring 910. The fixed block 909 moves into the interior of the mounting ring 907. Then the mounting ring 907 is sleeved on the mounting tube 903. The rotating rod 912 is released, and the fixed block 909 is engaged into the annular groove 908 by the elastic force of the second spring 910, fixing the mounting ring 907 to the outer wall of the mounting tube 903. The two mounting rings 907 clamp the heat exchange tube 14 between the two partitions 12, which facilitates the quick installation and disassembly of the heat exchange tube 14. At the same time, the length of the heat exchange tube 14 can be adjusted by using different numbers of connecting tubes 904 to adapt to heat exchangers of different lengths.

[0045] Please refer to this carefully. Figures 2 to 7 The outer wall of the positioning ring 818 fits against the inner wall of the mounting groove 816, and the outer wall of the locking block 817 fits against the inner wall of the locking groove 819.

[0046] In this embodiment: the positioning ring 818 is connected into the mounting groove 816, and the locking block 817 is engaged into the locking groove 819 to complete the positioning of the deflector plate 13 in the direction.

[0047] Please refer to this carefully. Figures 2 to 7The inner wall of the arc groove 806 is in contact with the outer wall of the arc plate 804, and the inner wall of the positioning groove 807 is in contact with the outer wall of the positioning plate 805.

[0048] In this embodiment: the first docking ring 801 and the second docking ring 802 are attached together, the positioning plate 805 passes through the second docking ring 802 along the positioning groove 807, and at the same time the arc plate 804 moves into the arc groove 806. After completion, the rotating ring 803 is rotated, and the rotating ring 803 rotates to drive the arc plate 804 to slide along the arc groove 806.

[0049] Please refer to this carefully. Figures 2 to 7 The inner wall of the reinforcing groove 808 fits against the outer wall of the reinforcing rod 814.

[0050] In this embodiment: when the third connecting shell 4 and the second connecting cylinder 5 are connected, the second connecting cylinder 5 contacts the third crossbar 815, pushing the third crossbar 815 to move. The displacement of the third crossbar 815 pushes multiple second crossbars 813 to move synchronously. The displacement of the second crossbars 813 drives the reinforcing rod 814 to move. The reinforcing rod 814 is inserted into the reinforcing groove 808 to fix the position of the positioning plate 805.

[0051] Please refer to this carefully. Figures 6 to 11 The threaded post 905 is matched with the threaded groove 906.

[0052] In this embodiment: the threaded post 905 is threaded into the threaded groove 906, and the installation tube 903 and the connecting tube 904 are installed so that the installation tube 903 is located at both ends of the connecting tube 904. By using different numbers of connecting tubes 904, the length of the heat exchange tube 14 can be adjusted.

[0053] Please refer to this carefully. Figures 6 to 11 The outer wall of the fixing block 909 is provided with a toothed groove, which meshes with the spur gear 911.

[0054] In this embodiment: Rotating the rotating rod 912 causes the spur gear 911 to rotate, and the rotation of the spur gear 911 causes the fixed block 909 to move, which compresses the second spring 910. The fixed block 909 then moves into the interior of the mounting ring 907.

[0055] Please refer to this carefully. Figures 6 to 11 The inner wall of the mounting ring 907 is in contact with the outer wall of the mounting tube 903, and the inner wall of the annular groove 908 is in contact with the outer wall of one end of the fixing block 909.

[0056] In this embodiment: the mounting ring 907 is sleeved on the mounting tube 903, the rotating rod 912 is released, and the fixing block 909 is engaged into the annular groove 908 by the elastic force of the second spring 910, thus fixing the mounting ring 907 to the outer wall of the mounting tube 903.

[0057] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixed tubesheet heat exchanger, characterized in that, It includes a first connecting cylinder (1), a heat exchange shell, and a second connecting cylinder (5). The first connecting cylinder (1) and the second connecting cylinder (5) are located at opposite ends of the heat exchange shell. The heat exchange shell is composed of a first connecting shell (2), a third connecting shell (4), and multiple second connecting shells (3). The first connecting shell (2) and the third connecting shell (4) are located at opposite ends of the second connecting shell (3). A tube-side inlet (6) is fixedly connected to the outer wall of the first connecting cylinder (1), and a tube-side outlet (7) is fixedly connected to the outer wall of the second connecting cylinder (5). A shell-side inlet (10) is fixedly connected to the bottom end of the first connecting shell (2). The third connecting cylinder (5) is... A shell-side outlet (11) is fixedly connected to the bottom end of the connecting shell (4). A baffle (12) is fixedly connected to one end of both the first connecting shell (2) and the third connecting shell (4). Baffles (13) are installed at both ends of the second connecting shell (3). A heat exchange tube (14) is installed between the two baffles (12). The first connecting cylinder (1) and the first connecting shell (2) are connected to the third connecting shell (4) and the second connecting cylinder (5) through connecting flanges. The second connecting shell (3) and the baffles (13) are installed through the installation mechanism (8). The heat exchange tube (14) is installed through the adjustment mechanism (9). The installation mechanism (8) includes a first docking ring (801) and a second docking ring (802). The first docking ring (801) is fixedly connected to one end of the second connecting shell (3) and the third connecting shell (4). The second docking ring (802) is fixedly connected to the other end of the second connecting shell (3) and the first connecting shell (2). A rotating ring (803) is rotatably connected to the outer wall of the second docking ring (802). An arc plate (804) is fixedly connected to the outer wall of the rotating ring (803). A positioning plate (805) is fixedly connected to the outer wall of the arc plate (804). An arc groove (806) is opened on the outer wall of the second docking ring (802). A positioning groove (807) is opened on the inner wall of the arc groove (806). A reinforcing groove (808) is opened at one end of the positioning plate (805). The mounting mechanism (8) further includes a vertical plate (809), which is fixedly connected to the top of the first connecting shell (2). A first horizontal bar (810) passing through the second docking ring (802) is slidably connected inside the vertical plate (809). A push plate (811) is fixedly connected to the top of the first horizontal bar (810). A first spring (812) connects the vertical plate (809) and the push plate (811). A second horizontal bar (812) passing through the first docking ring (801) and the second docking ring (802) is slidably connected to the top of the second connecting shell (3). 3) A reinforcing rod (814) is fixedly connected to the top of the second crossbar (813), and a third crossbar (815) extending to one end of the third connecting shell (4) is slidably connected to the top of the third connecting shell (4). The first connecting shell (2) and the third connecting shell (4) are close to each other and both ends of the second connecting shell (3) are provided with mounting grooves (816). The inner wall of the mounting groove (816) is symmetrically fixedly connected with a locking block (817). The outer wall of the baffle plate (13) is fixedly connected with a positioning ring (818), and the outer wall of the positioning ring (818) is provided with a locking groove (819). The regulating mechanism (9) includes a connecting hole (901), which is opened on the outer wall of the partition (12). The outer wall of the baffle (13) is provided with an insertion hole (902). The heat exchange tube (14) is composed of two mounting tubes (903) and multiple connecting tubes (904). One end of one mounting tube (903) and one connecting tube (904) is fixedly connected with a threaded post (905), and the other end of the other mounting tube (903) and one connecting tube (904) is provided with a threaded groove (906). The adjustment mechanism (9) further includes a mounting ring (907), which is mounted on the outer wall of the mounting tube (903). The outer wall of the mounting tube (903) has an annular groove (908). A fixing block (909) extending into the inner cavity of the mounting ring (907) is symmetrically slidably connected inside the mounting ring (907). A second spring (910) is connected between the fixing block (909) and the mounting ring (907). A spur gear (911) is rotatably connected inside the mounting ring (907) to the outer wall of the fixing block (909). A rotating rod (912) is fixedly connected to the outer wall of the spur gear (911).

2. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The outer wall of the positioning ring (818) is in contact with the inner wall of the mounting groove (816), and the outer wall of the card block (817) is in contact with the inner wall of the card slot (819).

3. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The inner wall of the arc groove (806) is in contact with the outer wall of the arc plate (804), and the inner wall of the positioning groove (807) is in contact with the outer wall of the positioning plate (805).

4. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The inner wall of the reinforcing groove (808) is in contact with the outer wall of the reinforcing rod (814).

5. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The threaded post (905) is matched with the threaded groove (906).

6. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The outer wall of the fixing block (909) is provided with a toothed groove, which meshes with the spur gear (911).

7. A fixed tubesheet heat exchanger according to claim 1, characterized in that, The inner wall of the mounting ring (907) is in contact with the outer wall of the mounting tube (903), and the inner wall of the annular groove (908) is in contact with the outer wall of one end of the fixing block (909).

Images