Variable-angle guide plate structure for fluorine-coated steel heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, and discloses a variable-angle guide plate structure for a fluorine-coated steel heat exchanger, which comprises a shell, end sockets are mounted at the left and right ends of the shell, tube plates are mounted at the left and right ends of the inner wall of the shell, and a plurality of tube bundles are jointly mounted on the tube plates on the left and right sides in a penetrating manner; and a plurality of baffle plates which are uniformly distributed from left to right are mounted on the inner wall of the shell in a sliding manner. The variable-angle guide plate structure for the fluorine-coated steel heat exchanger can effectively solve the problems that in the prior art, a traditional fixed guide plate structure cannot optimize flow field distribution in real time, local retention of media in a shell pass can be caused to form a dead zone, or turbulent flow impact is caused by too high flow speed, heat exchange efficiency is reduced, erosion corrosion to a heat exchange pipe can be aggravated, and the service life of the heat exchange pipe is prolonged. The service life of equipment is shortened; the problems that a heat exchanger shell needs to be disassembled during angle adjustment, the industrial production continuity is seriously affected, a fluorine coating is likely to be scratched and fall off due to external force collision, and the anti-corrosion protection function of the heat exchanger shell is greatly attenuated are solved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more specifically to a variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger. Background Technology

[0002] Fluorine-coated steel heat exchangers, thanks to the excellent corrosion resistance of fluorine materials and the good structural strength of steel, are widely used in heat exchange scenarios involving highly corrosive media in chemical, metallurgical, and pharmaceutical industries. Their heat exchange efficiency and flow field stability directly determine the energy consumption level and process stability of industrial production. During the operation of fluorine-coated steel heat exchangers, the baffle plate, as a core internal component, plays a crucial role in guiding the flow direction of the medium, optimizing the shell-side flow field distribution, preventing medium short-circuiting, and enhancing turbulent heat transfer.

[0003] To address this issue, this application designs a variable-angle guide plate structure for fluoropolymer-coated steel heat exchangers. Existing fixed guide plate structures in fluoropolymer-coated steel heat exchangers cannot adapt to the fluid flow characteristics under different operating conditions. On the one hand, when flow fluctuations or heat load adjustments occur, the fixed guide angle cannot optimize the flow field distribution in real time, causing localized stagnation of the medium within the shell side, forming dead zones, or triggering turbulent impacts due to excessive flow velocity. This not only reduces heat exchange efficiency but also exacerbates erosion and corrosion on the surface of the fluoropolymer-coated steel heat exchange tubes, shortening the equipment's service life. On the other hand, the rigid fixed structure of traditional guide plates requires disassembling the heat exchanger shell and replacing the entire unit when adjusting the angle. This operation is complex, has a long maintenance cycle, and seriously affects the continuity of industrial production. Furthermore, during disassembly and reassembly, external impacts can easily scratch and peel off the fluoropolymer coating on the surface of the fluoropolymer-coated steel heat exchange tubes, significantly reducing its anti-corrosion protection function. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a variable-angle guide plate structure for fluoropolymer-coated steel heat exchangers. This effectively solves the problems of traditional fixed guide plate structures, which cannot optimize the flow field distribution in real time, leading to localized stagnation of the medium within the shell side, creating dead zones, or causing turbulent impacts due to excessive flow velocity. These issues not only reduce heat exchange efficiency but also exacerbate erosion and corrosion on the surface of the fluoropolymer-coated steel heat exchange tubes, shortening equipment lifespan. Furthermore, angle adjustments require disassembling the heat exchanger shell for complete replacement, severely impacting industrial production continuity. Additionally, external impacts can easily scratch and peel off the fluoropolymer coating on the surface of the fluoropolymer-coated steel heat exchange tubes, significantly reducing their anti-corrosion protection function.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger, comprising: The shell has end caps installed at both ends, tube sheets are installed at both ends of the inner wall of the shell, and several tube bundles are installed through the tube sheets on both sides. Several baffles are slidably installed on the inner wall of the shell from left to right. The end caps, shell, tube sheets and baffles on the right side are provided with an installation alignment part, and the end caps, tube sheets and baffles on the left side are provided with an angle adjustment part. The installation alignment part includes alignment grooves on the inner wall of the shell corresponding to several baffles. A support shaft is installed through the right end cap and tube sheet. A flexible blocking plate that slides against the inner wall of the shell is provided at the lower end of the rightmost baffle. An alignment group is provided on the shell, end cap, baffle and flexible blocking plate. The angle adjustment unit includes a support shaft that is movably installed through the left end cap, tube sheet, and several baffles. An auger spring is installed between two adjacent baffles. A flexible guide plate is installed on the inner wall of the auger spring. The flexible guide plate has a spiral structure and a collar is installed at both the head and tail ends of the flexible guide plate. An angle adjustment group is provided on each corresponding baffle, auger spring, and flexible guide plate.

[0006] Furthermore, the left collar on the same flexible guide plate is movably sleeved on the outer wall of the second support shaft, the right collar is fixedly sleeved on the outer wall of the second support shaft, and the left collar is connected to the adjacent baffle plate by a compression spring, and the left end of the second support shaft is threaded to the left end cap.

[0007] Furthermore, the angle adjustment assembly includes a frame located between the auger spring and the flexible deflector, which is installed at both the head and tail ends. An extension plate is installed at the head end of the auger spring, and the extension plate and the adjacent deflector are connected by a fastening bolt via a common thread.

[0008] Furthermore, the alignment assembly includes receiving grooves that are opened on the outer walls of several baffles and flexible blocking plates, corresponding to the alignment slots. Alignment clamping plates are slidably installed on the inner walls of the receiving grooves of several baffles via compression springs, and alignment clamping plates are slidably installed on the inner walls of the receiving grooves of flexible blocking plates via compression springs.

[0009] Furthermore, the alignment assembly also includes a connecting sleeve plate installed at the right end of the flexible blocking plate. The left end of the outer wall of the support shaft is threaded to the connecting sleeve plate. The right end of the flexible blocking plate is symmetrically equipped with limiting slide rods fixedly connected to the right end cap. Both the front and rear limiting slide rods slide through the connecting sleeve plate. Several alignment magnets are embedded in the left end of the right end cap and the outer wall of the support shaft.

[0010] Furthermore, a circular cavity is provided at the left end of the first support shaft, and a docking shaft is installed at the right end of the second support shaft. The outer wall of the docking shaft is movably connected to the inner wall of the circular cavity, and handwheels are installed at the opposite ends of the first and second support shafts.

[0011] Furthermore, several baffles are simultaneously slidably sleeved on several tube bundles, and several flexible guide plates are also simultaneously slidably sleeved on several tube bundles.

[0012] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a variable-angle guide plate structure for a fluoropolymer-coated steel heat exchanger. When the second support shaft moves to the left, several auger springs are simultaneously compressed and tightened. During this process, the flexible guide plate undergoes a change in helical angle, transitioning to a compressed and tightened state. In this state, the flexible guide plates enhance the turbulence of the hot fluid and improve heat exchange efficiency. When the second support shaft moves to the right, the several auger springs simultaneously relax and reset, and through the frame, the corresponding flexible guide plates relax and reset simultaneously. During this process, the flexible guide plates return to their initial helical angle along with the auger springs, transitioning to a naturally relaxed state. At this point, several flexible guide vanes will reduce fluid resistance and adapt to low-resistance requirements until the flexible guide vanes are adjusted to the target guide angle, thereby achieving the effect of adjusting the guide angle of the flexible guide vanes. This can guide the flow state of the hot fluid in the shell and avoid the problem that when there are flow fluctuations or heat exchange load adjustments, the fixed guide angle cannot optimize the flow field distribution in real time, which will cause local stagnation of the medium in the shell side to form dead zones, or cause turbulent impact due to excessive flow velocity. This will not only reduce heat exchange efficiency, but also aggravate the erosion and corrosion of the fluorinated steel heat exchange tube surface and shorten the service life of the equipment.

[0013] The hot fluid is obstructed and its flow direction is changed by the staggered baffles. At the same time, it flows along a preset spiral path with different guide angles under the guidance of several flexible guide plates. This achieves efficient heat exchange between the cold fluid in the tube side and the hot fluid in the shell side. This avoids the problem that the rigid fixed structure of the traditional guide plates requires disassembling the heat exchanger shell and replacing it as a whole when adjusting the angle. The operation process is complicated and the maintenance cycle is long, which seriously affects the continuity of industrial production. In addition, during the repeated disassembly and reassembly, the fluorine coating on the surface of the fluorine-coated steel heat exchange tube is easily scratched and peeled off due to external impact, resulting in a significant reduction in its anti-corrosion protection function. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of a partial three-dimensional cross-section in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the tube sheet, baffle, mounting alignment part, and angle adjustment part in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation of the angle adjustment part in an embodiment of the present invention; Figure 5 This is a schematic diagram of the three-dimensional separation of the angle adjustment group in an embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional separation of the mounting and alignment parts in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the tube sheet, baffle plate, support shaft one, and support shaft two in an embodiment of the present invention; Figure 8 This is a schematic diagram of a partial three-dimensional cross-section of the shell in an embodiment of the present invention.

[0016] The labels in the diagram represent: 1. Shell; 2. Head; 3. Tube bundle; 4. Tube sheet; 5. Baffle plate; 6. Mounting alignment part; 61. Alignment groove; 62. Support shaft one; 63. Flexible blocking plate; 64. Alignment assembly; 641. Alignment clamping plate one; 642. Alignment clamping plate two; 643. Connecting sleeve; 644. Limiting slide rod; 645. Alignment magnet; 7. Angle adjustment part; 71. Support shaft two; 72. Screw spring; 73. Flexible guide plate; 74. Collar; 75. Angle adjustment assembly; 751. Frame; 752. Extension plate; 753. Fastening bolt; 8. Handwheel; 9. Docking shaft. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments. Example

[0019] Please see Figures 1-8 This invention provides a technical solution: a variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger, comprising: The shell 1 has end caps 2 installed at both ends of the shell 1. Tube sheets 4 are installed at both ends of the inner wall of the shell 1. Several tube bundles 3 are installed through the tube sheets 4 on both sides. Several baffles 5 are slidably installed on the inner wall of the shell 1, evenly distributed from left to right. The baffles 5 are staggered vertically. The end caps 2, shell 1, tube sheets 4 and baffles 5 on the right side are provided with an installation alignment part 6. The end caps 2, tube sheets 4 and baffles 5 on the left side are provided with an angle adjustment part 7. The installation alignment part 6 includes alignment grooves 61 that are opened on the inner wall of the housing 1 corresponding to a number of baffles 5. The alignment grooves 61 are arc-shaped. A support shaft 62 is installed through the end cap 2 and tube sheet 4 on the right side. A flexible blocking plate 63 that slides against the inner wall of the housing 1 is provided at the lower end of the rightmost baffle 5. An alignment group 64 is provided on the housing 1, end cap 2, baffle 5 and flexible blocking plate 63. The angle adjustment unit 7 includes a support shaft 71 that is movably installed through the left end cap 2, tube sheet 4 and several baffles 5. An auger spring 72 is provided between two adjacent baffles 5. A flexible guide plate 73 is installed on the inner wall of the auger spring 72. The flexible guide plate 73 has a spiral structure. A collar 74 is installed at both the head and tail ends of the flexible guide plate 73. An angle adjustment group 75 is provided on each corresponding baffle 5, auger spring 72 and flexible guide plate 73.

[0020] The left collar 74 on the same flexible guide plate 73 is movably sleeved on the outer wall of the second support shaft 71, the right collar 74 is fixedly sleeved on the outer wall of the second support shaft 71, and the left collar 74 is connected to the adjacent baffle plate 5 by a compression spring, and the left end of the second support shaft 71 is connected to the left end cap 2 by a thread on the outer wall of the left end.

[0021] The angle adjustment assembly 75 includes a frame 751 located between the auger spring 72 and the flexible guide plate 73, which is installed at both the head and tail ends. An extension plate 752 is installed at the head end of the auger spring 72, and a fastening bolt 753 is threadedly connected between the extension plate 752 and the adjacent deflector plate 5.

[0022] The alignment group 64 includes receiving grooves on the outer walls of several baffles 5 and flexible blocking plates 63, corresponding to the alignment slots 61. The receiving grooves are arc-shaped. Alignment clamping plates 641 are slidably installed on the inner walls of the receiving grooves of several baffles 5 by compression springs. Alignment clamping plates 642 are slidably installed on the inner walls of the receiving grooves of flexible blocking plates 63 by compression springs. The clamping ends of alignment clamping plates 641 and alignment clamping plates 642 are wedge-shaped structures facing opposite directions.

[0023] The alignment group 64 also includes a connecting sleeve plate 643 installed at the right end of the flexible blocking plate 63. The left end of the outer wall of the support shaft 62 is threaded to the connecting sleeve plate 643. The right end of the flexible blocking plate 63 is symmetrically equipped with limiting slide rods 644 fixedly connected to the right end cap 2. Both the front and rear limiting slide rods 644 slide through the connecting sleeve plate 643. Several alignment magnets 645 are embedded in the left end of the right end cap 2 and the outer wall of the support shaft 62. The length of the several alignment magnets 645 on the support shaft 62 is greater than the length of the several alignment magnets 645 on the right end cap 2.

[0024] A circular cavity is provided at the left end of the first support shaft 62, and a docking shaft 9 is installed at the right end of the second support shaft 71. The outer wall of the docking shaft 9 is movably connected to the inner wall of the circular cavity, and handwheels 8 are installed at the opposite ends of the first support shaft 62 and the second support shaft 71.

[0025] Several baffles 5 are simultaneously slidably sleeved on several tube bundles 3, and several flexible guide plates 73 are also simultaneously slidably sleeved on several tube bundles 3.

[0026] In practice: First, the several baffles 5 in this application are initially located at the corresponding alignment slots 61. At this time, several alignment plates 641 are inserted into the corresponding alignment slots 61, so that the several baffles 5 are respectively matched with the housing 1 through the alignment plates 641. The flexible blocking plate 63 is initially located on the right side of the housing 1 and is not connected to the rightmost baffle 5. At this time, the alignment plates 642 on the flexible blocking plate 63 are retracted into the corresponding receiving grooves, and the several auger springs 72 and the flexible guide plate 73 are initially in a naturally relaxed state. At this time, the flexible guide plate 73 is used to reduce fluid resistance and adapt to low resistance requirements. It should be noted that the several alignment magnets 645 on the support shaft 62 always maintain magnetic attraction connection with the several alignment magnets 645 on the right end cap 2.

[0027] During the alignment and adjustment phase of the flexible blocking plate 63, the operator first rotates the right handwheel 8. The right handwheel 8 will drive the support shaft 62 to rotate synchronously. Since the two limiting slide rods 644 at the front and rear will form an axial limit on the connecting sleeve 643, the support shaft 62 can drive the connecting sleeve 643 to slide to the left along the limiting slide rods 644 through the threaded transmission with the connecting sleeve 643. This will then drive the flexible blocking plate 63 to slide to the left along the inner wall of the shell 1 until the left end of the flexible blocking plate 63 is flush with the left end of the rightmost baffle 5. This achieves the effect of sealing and connecting the flexible blocking plate 63 with the rightmost baffle 5, avoiding the problem that when the heat exchanger starts working and the hot fluid medium is introduced, it cannot effectively and quickly fill the inner shell side of the shell 1 and directly discharge it from the outlet, resulting in uneven heating of several tube bundles 3 in the shell 1, wasting heat resources and affecting the heat exchange efficiency.

[0028] Next, the hot and cold fluids are controlled to enter the heat exchanger through the inlet and outlet respectively, and are distributed to the shell side or tube side to avoid direct mixing. Several baffles 5 inside the shell 1 will first guide the hot fluid, so that it evenly covers the surface of the tube bundle 3, until the hot fluid gradually fills the shell-side cavity on the left side of the flexible baffle 63 inside the shell 1 and evenly contacts the outer wall of several tube bundles 3. When the hot fluid is completely filled, the operator will turn the right handwheel 8 in the reverse direction again. The right handwheel 8 will drive the support shaft 62 to rotate in the reverse direction synchronously. The support shaft 62 can then drive the connecting sleeve 643 to slide to the right along the limit slide rod 644 to return to its original position through the threaded transmission with the connecting sleeve 643, thereby driving the flexible baffle 643 to rotate in the reverse direction. Plate 63 slides to the right along the inner wall of shell 1 to return to its original position until the flexible blocking plate 63 is far away from the rightmost baffle plate 5, thereby realizing the effect of unblocking and connecting the flexible blocking plate 63 and the rightmost baffle plate 5. As the flexible blocking plate 63 and the rightmost baffle plate 5 are unblocked and connected, the hot fluid will fill the entire shell-side cavity inside shell 1. During this period, when the hot fluid in the shell-side flows through the outside of the tube wall, the heat is transferred to the surface of tube bundle 3 through convection. The heat on the surface of tube bundle 3 is transferred to the inside of tube bundle 3 through solid heat conduction, and then transferred to the cold fluid inside tube bundle 3, completing one heat transfer cycle. After the heat exchange is completed, the two fluids are collected and discharged outside shell 1 and enter the subsequent process.

[0029] During the angle adjustment stage of the flexible guide plate 73, according to the actual heat exchange requirements of the heat exchanger, i.e., changes in the flow rate and velocity of the hot fluid, the operator first rotates the left handwheel 8 clockwise or counterclockwise. The left handwheel 8 will drive the second support shaft 71 to rotate synchronously. The second support shaft 71 is connected to the left end cap 2 via a threaded drive. During the rotation, the second support shaft 71 will move laterally back and forth along the axial direction. It should be noted that if the operator rotates the handwheel 8 clockwise, the second support shaft 71 will move to the right; if the operator rotates the handwheel 8 counterclockwise, the second support shaft 71 will move to the left. Since the second support shaft 71 forms a movable support with the first support shaft 62 through the docking shaft 9, the movement of the second support shaft 71 to the left or right... During this period, the docking shaft 9 will move synchronously to the left or right along the circular cavity of the support shaft 62. Under the magnetic attraction between the several alignment magnets 645 on the support shaft 62 and the several alignment magnets 645 on the right end cap 2, the support shaft 62 will not be affected by the rotation of the support shaft 71 and will not be subject to angular position shift. It should also be noted that the rightmost baffle plate 5 and flexible blocking plate 63 are both supported by the support shaft 62, while the remaining baffle plates 5 are all supported by the support shaft 71. During the movement of the support shaft 71 to the left or right, the baffle plates 5 and flexible blocking plates 63 will not lose their original support force and thus will not experience positional shift within the shell 1.

[0030] During the linkage deformation stage of the auger spring 72 and the flexible guide plate 73, it should be noted that multiple angle adjustment groups 75 are provided inside the housing 1 in this application. Each flexible guide plate 73 corresponding to each angle adjustment group 75 is provided with two left and right collars 74. For ease of description, only one angle adjustment group 75 and its corresponding left and right collars 74 are described here. When the support shaft 2 71 moves axially, the support shaft 2 71 will drive the corresponding auger spring 72 and flexible guide plate 73 to move synchronously through the right fixed collar 74 corresponding to each angle adjustment group 75.

[0031] When the second support shaft 71 moves to the left, several auger springs 72 will be simultaneously compressed and tightened, and through the frame 751, the corresponding flexible guide plates 73 will also be simultaneously compressed and tightened. During this period, the flexible guide plates 73 will change their spiral angle, transforming into a compressed and tightened state. At this time, the several flexible guide plates 73 will enhance the turbulence of the hot fluid and improve the heat exchange efficiency. When the second support shaft 71 moves to the right, several auger springs 72 will simultaneously relax and reset, and through the frame 751, the corresponding flexible guide plates 73 will also relax and reset. During this period, the flexible guide plates 73 will return to their initial spiral angle along with the auger springs 72, transforming into a naturally relaxed state. The flexible guide plate 73 reduces fluid resistance and adapts to low-resistance requirements. Once the flexible guide plate 73 is adjusted to the target guide angle, the heat exchanger can resume operation. This achieves the effect of adjusting the guide angle of the flexible guide plate 73, guiding the flow of hot fluid within the shell 1. This avoids the problem that when there are flow fluctuations or heat exchange load adjustments, a fixed guide angle cannot optimize the flow field distribution in real time, which can cause local stagnation of the medium in the shell side, forming dead zones, or cause turbulent impact due to excessive flow velocity. This not only reduces heat exchange efficiency but also aggravates the erosion and corrosion of the fluorinated steel heat exchange tube surface, shortening the service life of the equipment.

[0032] A more detailed explanation is needed here. The hot fluid will be blocked and its flow direction will be changed by the staggered baffles 5. At the same time, under the guidance of several flexible guide plates 73, it will flow along a preset spiral path with different guide angles. This will achieve the effect of efficient heat exchange between the cold fluid in the tube side and the hot fluid in the shell side. This avoids the problem that the rigid fixed structure of the traditional guide plates requires disassembling the heat exchanger shell 1 and replacing it as a whole when adjusting the angle. The operation process is complicated and the maintenance cycle is long, which seriously affects the continuity of industrial production. In addition, during the repeated disassembly and reassembly, the fluorine coating on the surface of the fluorine-coated steel heat exchange tube is easily scratched and peeled off due to external impact, resulting in a significant reduction in its anti-corrosion protection function.

[0033] During the maintenance and disassembly phase, when the heat exchanger still requires maintenance and cleaning after long-term operation, the operator must first turn the left handwheel 8 to move the support shaft 71 to the right. The auger spring 72 will then naturally relax and reset, and the flexible guide plate 73 will return to its initial spiral angle. Then, the operator can disassemble the left end cap 2 and tube sheet 4 in sequence. Depending on the maintenance needs, the operator can choose to remove the baffle 5, auger spring 72, flexible guide plate 73, or several tube bundles 3 located on the left side from the shell 1 in sequence for cleaning, inspection, or replacement.

[0034] When removing several tube bundles 3, the staff can directly pull out the tube bundles 3 one by one; when removing the baffle 5, auger spring 72, and flexible guide plate 73, since the baffle 5 and flexible blocking plate 63 are respectively engaged and aligned with the alignment groove 61 on the inner wall of the shell 1 through the alignment plate 1 641 and the alignment plate 2 642, and the engagement ends of the alignment plate 1 641 and the alignment plate 2 642 are wedge-shaped structures facing opposite directions, when the staff removes the baffle 5 to the left, several alignment plates 1 641 will be squeezed and compressed back into the corresponding receiving groove to avoid it, and several baffles 5 can be directly pulled out along the axial direction of several tube bundles 3 for cleaning, maintenance or replacement.

[0035] It should be noted that the handwheel 8 in this application is detachable. During maintenance and disassembly, the handwheel 8 can be removed first, so that the second support shaft 71 and the first support shaft 62 can remain in the housing 1 to support the components. After all the components except the flexible baffle plate 63 are removed, the second support shaft 71 can be removed in sequence and the right end cap 2 can be removed. Finally, the first support shaft 62 and the flexible baffle plate 63 can be removed for cleaning and maintenance. There is no fixed connection between the housing 1, the tube bundle 3 and the baffle plate 5, which simplifies the maintenance and disassembly operation. Each component can be replaced individually, avoiding overall replacement and reducing equipment costs. At the same time, it can also reduce the difficulty of cleaning the components inside the heat exchanger.

[0036] In summary, this application has the following advantages: Firstly, during the alignment and adjustment phase of the flexible blocking plate 63, the operator can rotate the right handwheel 8, and the support shaft 62 can drive the connecting sleeve 643 to slide to the left along the limiting slide rod 644 through the threaded transmission with the connecting sleeve 643, until the left end of the flexible blocking plate 63 is flush with the left end of the rightmost baffle 5. This achieves the sealing and docking effect between the flexible blocking plate 63 and the rightmost baffle 5, avoiding the problem that when the heat exchanger starts working and the hot fluid medium is introduced, it cannot effectively and quickly fill the inner shell side of the shell 1 and directly discharge it from the outlet, resulting in uneven heating of several tube bundles 3 in the shell 1, wasting heat resources and affecting heat exchange efficiency.

[0037] Secondly, several baffles 5 inside the shell 1 will first guide the hot fluid, so that it evenly covers the surface of the tube bundle 3, until the hot fluid gradually fills the shell cavity on the left side of the flexible blocking plate 63 inside the shell 1 and evenly contacts the outer wall of several tube bundles 3. After the hot fluid is filled, the operator will turn the right handwheel 8 in the opposite direction again. The right handwheel 8 will drive the support shaft 62 to rotate in the opposite direction synchronously. The support shaft 62 can then drive the connecting sleeve 643 to slide to the right along the limit slide rod 644 to return to its original position through the threaded transmission with the connecting sleeve 643. This will then drive the flexible blocking plate 63 to slide to the right along the inner wall of the shell 1 to return to its original position, until the flexible blocking plate 63 is far away from the rightmost baffle 5, thereby achieving the effect of unblocking and connecting the flexible blocking plate 63 with the rightmost baffle 5.

[0038] Thirdly, during the angle adjustment stage of the flexible guide plate 73, according to the actual heat exchange requirements of the heat exchanger, the operator first rotates the left handwheel 8 in the forward or reverse direction. The second support shaft 71 will then move laterally along the axial direction. Since the second support shaft 71 forms a movable support with the first support shaft 62 through the docking shaft 9, during the left or right movement of the second support shaft 71, it will drive the docking shaft 9 to move synchronously to the left or right along the circular cavity of the first support shaft 62. Furthermore, several alignment magnets 645 on the first support shaft 62 are aligned with the right... Under the magnetic attraction of several alignment magnets 645 on the side cap 2, the first support shaft 62 will not be affected by the rotation of the second support shaft 71 and will not be shifted in angular position. The rightmost baffle plate 5 and flexible blocking plate 63 are both supported by the first support shaft 62, and the remaining baffle plates 5 are all supported by the second support shaft 71. During the movement of the second support shaft 71 to the left or right, the baffle plates 5 and flexible blocking plates 63 will not lose their original support force and thus will not be shifted in position within the shell 1.

[0039] Fourthly, when the second support shaft 71 moves to the left, several auger springs 72 will be simultaneously compressed and tightened. During this period, the flexible guide plates 73 will change their spiral angle and enter a compressed and tightened state. At this time, the flexible guide plates 73 will enhance the turbulence of the hot fluid and improve the heat exchange efficiency. When the second support shaft 71 moves to the right, several auger springs 72 will simultaneously relax and reset, and through the frame 751, the corresponding flexible guide plates 73 will be simultaneously relaxed and reset. During this period, the flexible guide plates 73 will return to their initial spiral angle along with the auger springs 72 and enter a naturally relaxed state. The flexible guide plate 73 will reduce fluid resistance and adapt to low resistance requirements until the flexible guide plate 73 is adjusted to the target guide angle, thereby achieving the effect of adjusting the guide angle of the flexible guide plate 73. This can guide the flow state of the hot fluid in the shell 1 and avoid the problem that when there are flow fluctuations or heat exchange load adjustments, the fixed guide angle cannot optimize the flow field distribution in real time, which will cause local stagnation of the medium in the shell side to form dead zones, or cause turbulent impact due to excessive flow velocity. This will not only reduce heat exchange efficiency, but also aggravate the erosion and corrosion of the fluorinated steel heat exchange tube surface and shorten the service life of the equipment.

[0040] Fifthly, the hot fluid will have its flow direction changed by the staggered baffles 5, and will flow along a preset spiral path with different guide angles under the guidance of several flexible guide plates 73. This achieves efficient heat exchange between the cold fluid in the tube side and the hot fluid in the shell side, avoiding the problem that the rigid fixed structure of the traditional guide plates requires disassembling the heat exchanger shell 1 and replacing it as a whole when adjusting the angle. This is complicated by the operation process, long maintenance cycle, serious impact on the continuity of industrial production, and the problem that the fluorine coating on the surface of the fluorine-coated steel heat exchange tube is easily scratched and peeled off due to external impact during multiple disassembly and reassembly, resulting in a significant reduction in its anti-corrosion protection function.

[0041] Advantage six: During maintenance and disassembly, there is no fixed connection between the shell 1, tube bundle 3 and baffle 5, which simplifies maintenance and disassembly operations. Each component can be replaced individually, avoiding overall replacement and reducing equipment costs. At the same time, it also reduces the difficulty of cleaning the components inside the heat exchanger.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable-angle guide plate structure for a fluoropolymer-coated steel heat exchanger, characterized in that, include: The shell (1) has end caps (2) installed at both ends of the shell (1), tube sheets (4) installed at both ends of the inner wall of the shell (1), and several tube bundles (3) are installed through the tube sheets (4) on both sides. Several baffles (5) are slidably installed on the inner wall of the shell (1) and evenly distributed from left to right. The end caps (2), shell (1), tube sheets (4) and baffles (5) on the right side are provided with an installation alignment part (6), and the end caps (2), tube sheets (4) and baffles (5) on the left side are provided with an angle adjustment part (7). The installation alignment part (6) includes alignment grooves (61) on the inner wall of the shell (1) corresponding to several baffles (5), a support shaft (62) is movably installed on the right end cap (2) and tube sheet (4), a flexible blocking plate (63) is provided at the lower end of the rightmost baffle (5) and slides against the inner wall of the shell (1), and alignment groups (64) are provided on the shell (1), end cap (2), baffle (5) and flexible blocking plate (63). The angle adjustment unit (7) includes a support shaft (71) that is movably installed on the left end cap (2), tube sheet (4) and several baffles (5). A screw conveyor spring (72) is provided between two adjacent baffles (5). A flexible guide plate (73) is installed on the inner wall of the screw conveyor spring (72). The flexible guide plate (73) has a spiral structure. A collar (74) is installed at the head and tail ends of the flexible guide plate (73). An angle adjustment group (75) is provided on each corresponding baffle (5), screw conveyor spring (72) and flexible guide plate (73).

2. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 1, characterized in that: The left collar (74) on the same flexible guide plate (73) is movably sleeved on the outer wall of the second support shaft (71), the right collar (74) is fixedly sleeved on the outer wall of the second support shaft (71), and the left collar (74) is connected to the adjacent baffle plate (5) by a compression spring, and the left end of the second support shaft (71) is connected to the left end cap (2) by a thread on the outer wall of the left end.

3. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 1, characterized in that: The angle adjustment assembly (75) includes a frame (751) located between the auger spring (72) and the flexible guide plate (73) and installed at both the head and tail ends. An extension plate (752) is installed at the head end of the auger spring (72), and a fastening bolt (753) is threadedly connected between the extension plate (752) and the adjacent deflector plate (5).

4. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 1, characterized in that: The alignment group (64) includes receiving grooves on the outer walls of several baffles (5) and flexible blocking plates (63) corresponding to the alignment slots (61). Alignment plate one (641) is slidably installed on the inner wall of the receiving groove of several baffles (5) by compression springs, and alignment plate two (642) is slidably installed on the inner wall of the receiving groove of flexible blocking plates (63) by compression springs.

5. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 4, characterized in that: The alignment group (64) also includes a connecting sleeve plate (643) installed at the right end of the flexible blocking plate (63). The left end of the outer wall of the support shaft (62) is threaded to the connecting sleeve plate (643). The right end of the flexible blocking plate (63) is symmetrically installed with limiting slide rods (644) fixedly connected to the right end cap (2). Both the front and rear limiting slide rods (644) slide through the connecting sleeve plate (643). Several alignment magnets (645) are embedded on the left end of the right end cap (2) and the outer wall of the support shaft (62) in a circular and uniform distribution.

6. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 5, characterized in that: The left end of the first support shaft (62) has a circular cavity, and the right end of the second support shaft (71) has a docking shaft (9). The outer wall of the docking shaft (9) is movably connected to the inner wall of the circular cavity, and handwheels (8) are installed at the opposite ends of the first support shaft (62) and the second support shaft (71).

7. The variable angle guide plate structure for a fluoropolymer-coated steel heat exchanger according to claim 4, characterized in that: Several baffles (5) are simultaneously slidably sleeved on several tube bundles (3), and several flexible guide plates (73) are also simultaneously slidably sleeved on several tube bundles (3).

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