A heat exchanger with a removable inner liner

Abstract

This utility model relates to the technical field of heat exchange equipment and discloses a heat exchanger with a detachable inner liner, including a heat exchanger shell, an inner liner, and a U-shaped tube. The disassembly assembly includes a first connecting block rotatably connected via a first rotating shaft. The first connecting block drives a threaded post, the end of which is rotatably connected to a first limiting post via a second rotating shaft. The first limiting post engages with a first limiting groove on the outer wall of the inner liner. Rotating the first connecting block allows for quick locking and unlocking of the inner liner. The replacement assembly includes a pressing block, a spring, and a second limiting post. Pressing the pressing block disengages the second limiting post from the second limiting groove on the U-shaped tube, enabling rapid replacement of the U-shaped tube. This utility model solves the problems of difficult disassembly and low maintenance efficiency of internal components in existing heat exchangers. Through a clever mechanical structure, it achieves rapid disassembly and replacement of the inner liner and U-shaped tube, reducing maintenance costs and possessing high practical value.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a heat exchanger with a detachable inner liner. Background Technology

[0002] Heat exchangers, as key equipment for achieving heat exchange between fluids at different temperatures, play an indispensable role in many industrial fields such as chemical, petroleum, power, and HVAC. Among them, shell-and-tube heat exchangers are widely used due to their advantages such as robust structure, strong adaptability, and large throughput.

[0003] In the design of some shell-and-tube heat exchangers, to optimize the flow path of the shell-side fluid, enhance heat transfer, or protect the main shell from corrosive fluids, an inner liner or flow guide tube is usually installed inside the heat exchanger shell. This inner liner often integrates internal components such as baffles and is one of the core components inside the heat exchanger. Currently, the connection between this inner liner and the main shell of the heat exchanger is usually achieved by welding or by fastening with a large number of bolts arranged circumferentially.

[0004] However, the aforementioned traditional connection methods have revealed significant drawbacks during maintenance after long-term equipment operation. When the shell-side fluid is prone to scaling or contains impurities requiring periodic cleaning of the inner liner, the welded fixing method makes the inner liner virtually impossible to disassemble. Maintenance personnel can only clean it through limited access ports, resulting in cramped operating space and poor cleaning effectiveness. While bolt fastening theoretically allows for disassembly, the process requires loosening or tightening numerous bolts one by one, which is not only extremely labor-intensive and time-consuming but also prone to bolt corrosion and jamming, greatly increasing maintenance difficulty and equipment downtime.

[0005] Therefore, this utility model proposes a heat exchanger with a detachable inner liner to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problem that in the prior art, the inner liner of the heat exchanger with the inner shell is usually welded to the main shell or fastened with a large number of bolts, which makes the disassembly process cumbersome and time-consuming and maintenance extremely inconvenient, the present invention aims to provide a heat exchanger with a detachable inner liner that has an improved structure and can effectively solve the above problems.

[0007] This utility model provides a heat exchanger with a detachable inner liner, comprising: a heat exchanger shell, an inner liner disposed inside the heat exchanger shell, and a U-shaped tube disposed inside the inner liner; and a disassembly assembly.

[0008] The disassembly assembly includes a fixing plate fixed to the inner wall of the heat exchanger housing, and a first connecting block rotatably connected to the fixing plate via a first rotating shaft. A threaded post is connected to the first connecting block, and the end of the threaded post is rotatably connected to a first limiting post via a second rotating shaft.

[0009] Furthermore, a first limiting groove is provided on the outer wall of the inner liner, and the first limiting post of the disassembly assembly is combined with the first limiting groove of the inner liner by a snap-fit ​​connection.

[0010] Preferably, the heat exchanger with a removable inner liner also includes a replacement assembly for detachably fixing the U-tube, wherein the end of the U-tube is provided with a second limiting groove; the replacement assembly includes a second connecting plate fixed to one end of the heat exchanger housing, and a second limiting post that can engage or disengage with the second limiting groove.

[0011] Preferably, as a specific embodiment, the replacement assembly further includes a second connecting block fixed to the second connecting plate, and a connecting post slidably passing through the second connecting block; the second limiting post is fixed to the first connecting plate, and the first connecting plate is fixedly connected to one end of the connecting post. In addition, the replacement assembly further includes a pressing block connected to the other end of the connecting post, and a spring sleeved on the connecting post, the two ends of which abut against the second connecting block and the first connecting plate respectively.

[0012] Preferably, the inner liner is further fixedly connected to multiple baffles, and the U-shaped tube passes through the baffles.

[0013] Preferably, the open end of the heat exchanger shell is detachably connected to an end cap via a flange.

[0014] Preferably, the two ends of the U-shaped tube are respectively connected to a first water inlet and a second water outlet; the heat exchanger shell is connected to a second water inlet and a first water outlet.

[0015] Preferably, the U-shaped tube includes two parallel straight pipe sections and a bent pipe section connecting the two straight pipe sections, and the second limiting groove is formed on the straight pipe section.

[0016] This utility model has the following beneficial effects: In this invention, a rotating linkage-type disassembly assembly consisting of a first connecting block, a threaded column, and a first limiting column is provided, and this assembly engages with the first limiting groove on the inner liner. This solves the problem in the prior art where the inner liner of a heat exchanger is usually fastened by welding or complex bolts, resulting in difficult disassembly, time-consuming and labor-intensive disassembly, and low maintenance efficiency. The invention achieves the technical effect of enabling the inner liner to be quickly and conveniently removed or installed from the heat exchanger shell, greatly facilitating the cleaning and maintenance of the equipment's interior, and significantly improving the efficiency of maintenance work.

[0017] In this invention, a pressing spring-type replacement assembly consisting of a pressing block, a connecting column, a spring, and a second limiting column is provided, and this assembly engages with the second limiting groove on the U-shaped tube. This solves the problem in the prior art where it is difficult to replace individual heat exchange tubes when they are damaged or blocked, and usually requires the replacement of the entire tube bundle, resulting in high maintenance costs and long downtime. This invention achieves the technical effect of quickly replacing and installing a single U-shaped tube without complicated tools, effectively reducing maintenance costs and difficulty, and extending the overall service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a heat exchanger with a detachable inner liner proposed in this utility model. Figure 2 A schematic diagram of the heat exchanger shell structure of a heat exchanger with a detachable inner liner proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the image; Figure 4 for Figure 2 Enlarged view of point B in the image.

[0019] Legend: 1. Heat exchanger shell; 2. First inlet; 3. Second inlet; 4. First outlet; 5. Flange; 6. Second outlet; 7. U-tube; 8. Baffle plate; 9. Disassembly assembly; 901. First connecting block; 902. First rotating shaft; 903. Fixing plate; 904. Threaded post; 905. First limiting groove; 906. First limiting post; 907. Second rotating shaft; 10. Replacement assembly; 1001. Second connecting block; 1002. Pressing block; 1003. Spring; 1004. Connecting post; 1005. First connecting plate; 1006. Second limiting post; 1007. Second limiting groove; 11. Inner liner body; 12. Second connecting plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Example: Please refer to Figures 1 to 4This utility model provides a heat exchanger with a detachable inner liner, which aims to solve the problems of difficult disassembly of internal components and low maintenance efficiency in the prior art.

[0022] like Figure 1 and Figure 2 As shown, the heat exchanger with a detachable inner liner includes a heat exchanger shell 1 and an inner liner body 11 disposed inside the heat exchanger shell 1. The open end of the heat exchanger shell 1 is detachably connected to an end cap via a flange 5. The heat exchanger shell 1 is also connected to a second inlet 3 and a first outlet 4. Multiple baffles 8 are fixedly connected inside the inner liner body 11. A set of U-shaped tubes 7 passes through the baffles 8. The two ends of the U-shaped tubes 7 are respectively connected to the first inlet 2 and the second outlet 6.

[0023] To enable detachable installation of the inner liner body 11, the heat exchanger also includes a disassembly assembly 9, as shown in the figure. Figure 3 The disassembly assembly 9 includes a fixing plate 903 fixed to the inner wall of the heat exchanger housing 1. A first connecting block 901 is rotatably connected to the fixing plate 903 via a first rotating shaft 902. A threaded post 904 is connected to the first connecting block 901. The end of the threaded post 904 is rotatably connected to a first limiting post 906 via a second rotating shaft 907. A first limiting groove 905 is provided on the outer wall of the inner liner body 11 for engaging with the first limiting post 906. By rotating the first connecting block 901, the threaded post 904 can be rotated around the first rotating shaft 902, and the first limiting post 906 can be driven to swing around the second rotating shaft 907, ultimately achieving engagement or separation between the first limiting post 906 and the first limiting groove 905, thereby completing the locking or unlocking of the inner liner body 11.

[0024] To enable quick replacement of the U-tube 7, the heat exchanger with a removable inner liner also includes a replacement assembly 10, and the replacement assembly 10 and the U-tube 7 form a specific structural fit and connection relationship.

[0025] Please refer to Figure 1 and Figure 4 The core structure is described in detail below: The replacement component 10 includes a second connecting plate 12 fixed to one end of the heat exchanger housing 1, a second connecting block 1001 fixed to the second connecting plate 12, a connecting post 1004 slidably passing through the second connecting block 1001, a pressing block 1002 connected to the other end of the connecting post 1004, a spring 1003 sleeved on the connecting post 1004, the two ends of the spring 1003 respectively abutting against the second connecting block 1001 and the first connecting plate 1005 fixed to one end of the connecting post 1004, and a second limiting post 1006 fixed to the first connecting plate 1005.

[0026] Meanwhile, a second limiting groove 1007 is correspondingly provided on the U-shaped tube 7. The U-shaped tube 7 includes two parallel straight pipe sections and a bent pipe section connecting the two straight pipe sections. The second limiting groove 1007 is provided on the straight pipe section. In the assembled state, the spring 1003 is in a naturally extended state. Its elasticity pushes the first connecting plate 1005, so that the second limiting post 1006 is engaged in the second limiting groove 1007 of the U-shaped tube 7. By pressing the pressing block 1002, the connecting post 1004 slides in the second connecting block 1001 and compresses the spring 1003, thereby driving the second limiting post 1006 to disengage from the second limiting groove 1007. This press-to-unlock cooperation structure ensures that the U-shaped tube 7 is securely fixed and can be quickly disassembled and replaced.

[0027] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, in order to enhance the turbulence of the shell-side fluid and improve the heat exchange efficiency, multiple baffles 8 are fixedly connected to the interior of the inner liner body 11 along its axial direction. Each baffle 8 has a through hole for a U-shaped tube 7 to pass through. The U-shaped tube 7 passes through the through hole of the baffle 8.

[0028] As another preferred embodiment, in order to facilitate the inspection and component replacement inside the heat exchanger, a flange 5 is fixedly connected to the periphery of the open end of the heat exchanger shell 1, and the end cover is detachably connected to the flange 5 by bolts, thereby sealing the open end of the heat exchanger shell 1.

[0029] In another preferred embodiment, in order to define the independent fluid channels of the tube side and the shell side, the two ports of the U-tube 7 are respectively connected to the first inlet 2 and the second outlet 6 through pipelines to form a tube side fluid loop, and the tube wall of the heat exchanger shell 1 is respectively opened and connected to the second inlet 3 and the first outlet 4 to form a shell side fluid loop.

[0030] As another preferred embodiment, in order to clarify the setting position of the second limiting groove 1007, the U-shaped tube 7 specifically includes two parallel straight pipe sections and a semi-circular bent pipe section connecting the two straight pipe sections, and the second limiting groove 1007 is opened in one or two straight pipe sections near their ports.

[0031] Working principle: During heat exchange, the cold medium that needs to be heated enters from the first inlet 2 and flows through the internal channel of the U-tube 7. During this process, it absorbs heat from outside the tube and rises in temperature. Finally, it flows out from the second outlet 6. The hot medium, which serves as the heat source, enters the interior of the heat exchanger shell 1 from the second inlet 3. In the shell-side space between the inner liner body 11 and the U-tube 7, it is guided by multiple baffles 8 to form a zigzag flow, which fully exchanges heat with the outer wall of the U-tube 7. After cooling down, it is discharged from the first outlet 4.

[0032] When the inner liner body 11 needs to be disassembled for maintenance, the operator first opens the heat exchanger end cover through the flange 5, and then rotates the first connecting block 901 of the disassembly assembly 9. The first connecting block 901 will drive the threaded column 904 to swing around the first rotating shaft 902 as the fulcrum. The threaded column 904 will further drive the first limiting column 906 to rotate around the second rotating shaft 907 as the fulcrum, so that the first limiting column 906 disengages from the first limiting groove 905 on the outer wall of the inner liner body 11. After all the disassembly assemblies 9 are unlocked, the inner liner body 11 can be completely pulled out from the heat exchanger shell 1.

[0033] When a blocked or damaged U-tube 7 needs to be replaced, the operator presses the pressing block 1002 of the replacement component 10. The pressing block 1002 drives the connecting post 1004 to slide within the second connecting block 1001 and compresses the spring 1003. The movement of the connecting post 1004 causes the second limiting post 1006, which is fixed on the first connecting plate 1005, to exit from the second limiting groove 1007 of the U-tube 7. At this time, the U-tube 7 can be easily pulled out. When installing a new U-tube 7, simply align it and push it in. The second limiting post 1006 will automatically reset and lock into the second limiting groove 1007 under the elastic force of the spring 1003, completing the quick fixation.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A heat exchanger with detachable inner liner tube, comprising a heat exchanger shell (1), an inner liner tube body (11) arranged inside the heat exchanger shell (1), and a U-shaped tube (7) arranged inside the inner liner tube body (11); characterized in that, The heat exchanger also includes a disassembly assembly (9); the disassembly assembly (9) includes a fixing plate (903) fixed to the inner wall of the heat exchanger shell (1), and a first connecting block (901) rotatably connected to the fixing plate (903) via a first rotating shaft (902); a threaded post (904) is connected to the first connecting block (901), and the end of the threaded post (904) is rotatably connected to a first limiting post (906) via a second rotating shaft (907); a first limiting groove (905) is provided on the outer wall of the inner liner body (11) for engaging with the first limiting post (906).

2. The heat exchanger with detachable inner liner tube according to claim 1, wherein, The heat exchanger also includes a replacement assembly (10) for detachably fixing the U-tube (7); the end of the U-tube (7) is provided with a second limiting groove (1007); the replacement assembly (10) includes a second connecting plate (12) fixed to one end of the heat exchanger housing (1), and a second limiting post (1006) that can be engaged or disengaged from the second limiting groove (1007).

3. The heat exchanger with removable inner liner tube according to claim 2, wherein, The replacement component (10) further includes a second connecting block (1001) fixed on the second connecting plate (12) and a connecting post (1004) slidably passing through the second connecting block (1001); the second limiting post (1006) is fixed on the first connecting plate (1005), and the first connecting plate (1005) is fixedly connected to one end of the connecting post (1004).

4. The heat exchanger with removable inner liner tube according to claim 3, wherein The replacement assembly (10) further includes a pressing block (1002) connected to the other end of the connecting post (1004), and a spring (1003) sleeved on the connecting post (1004); the two ends of the spring (1003) abut against the second connecting block (1001) and the first connecting plate (1005), respectively.

5. The heat exchanger with removable inner liner tube of claim 1, wherein, The inner liner body (11) is also fixedly connected to a number of baffles (8), and the U-shaped tube (7) passes through the baffles (8).

6. The heat exchanger with removable inner liner tube of claim 1, wherein, The open end of the heat exchanger housing (1) is detachably connected to an end cap via a flange (5).

7. The heat exchanger with removable inner liner tube of claim 1, wherein, The two ends of the U-shaped tube (7) are respectively connected to the first water inlet (2) and the second water outlet (6); the heat exchanger shell (1) is connected to the second water inlet (3) and the first water outlet (4).

8. The heat exchanger with removable inner liner tube of claim 2, wherein, The U-shaped pipe (7) includes two parallel straight pipe sections and a bent pipe section connecting the two straight pipe sections, and the second limiting groove (1007) is formed on the straight pipe section.

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