Heat exchanger tube channel with enhanced sealing

Abstract

The application belongs to the technical field of tube-bank heat exchanger, and particularly relates to a heat exchanger tube bank with sealing degree strengthening function. The structure of the heat exchanger tube bank comprises a tank plate, two internal partitions, mounting holes, and heat exchange tubes, further comprises a blocking rubber ring unit arranged on the mounting hole and used for abutting against the end face of the heat exchange tube, a fixed frame unit arranged on the inner side face of the tank plate, and a positioning rubber ring unit arranged on the fixed frame unit and used for abutting against the side face away from the internal partition. The beneficial effects of the application at least include that the heat exchanger tube bank has rubber ring structures with relatively high sealing degree and relatively low dismounting difficulty between the tank plate and the internal partition, and between the internal partition and the heat exchange tube, so that the sealing degree between the shell side and the tube side is significantly improved, the mutual penetration between the shell side material and the tube side material is prevented, and the safety of the heat exchange operation is improved.

Description

Technical Field

[0001] This application belongs to the technical field of tube-and-box heat exchangers, and particularly relates to a heat exchanger tube box with enhanced sealing function. Background Technology

[0002] A tube-and-shell heat exchanger is a heat exchange device that allows heat to be exchanged between the tube side and the shell side. It is widely used in flue gas treatment, chemical and pharmaceutical industries.

[0003] Generally, a tube-and-shell heat exchanger mainly consists of an outer casing, internal baffles, and heat exchange tubes. The outer casing has shell-side inlet and outlet, and tube-side inlet and outlet, which, together with the internal baffles and heat exchange tubes, form a sealed tube-side space. For example, relatively high-temperature flue gas sequentially passes through the shell-side inlet, the outer casing, and the shell-side outlet, while room-temperature water sequentially passes through the tube-side inlet, the first internal baffle, the heat exchange tubes, the second internal baffle, and the tube-side outlet, thus achieving heat exchange from high-temperature flue gas to room-temperature water.

[0004] The external enclosure itself needs to be sufficiently sealed to prevent, for example, the high-temperature flue gas mentioned above from leaking into the atmosphere. Similarly, the sealed space within the piping also needs to be sufficiently sealed to prevent, for example, the high-temperature flue gas and room-temperature water from interpenetrating.

[0005] For example, Chinese utility model patent with authorization announcement number CN215598172U and authorization announcement date of January 21, 2022 discloses a new type of horizontal gas-to-gas fluoroplastic heat exchanger, whose main structural components include: main casing, shell-side inlet, shell-side outlet, tube-side inlet, tube-side outlet, rotating smoke box, heat-conducting tube layer, heat-conducting tube, fixing plate, connecting piece, through hole, partition, vertical plate, and through hole.

[0006] The advantages of the fluoroplastic heat exchanger in this utility model patent are mainly: the overall horizontal design of the heat conduction tube reduces the adverse effects of the liquid film on the heat conduction effect.

[0007] However, in actual use, this fluoroplastic heat exchanger still has at least the following problems with relatively low sealing: the heat pipes and through holes, and the connecting plates and main housing are connected by plug-in and welding methods, respectively. The former has a relatively low sealing degree, and the latter has a relatively low sealing degree when the welding quality is average. This leads to the two materials permeating each other in gaps and holes, which seriously affects the safety of heat exchange operation. Utility Model Content

[0008] This application provides a heat exchanger tube box with enhanced sealing function. The technical problem it aims to solve is how to enhance the sealing between the tube side and shell side of the heat exchanger in a relatively simple and efficient way.

[0009] The technical solution adopted by this application to solve the above problems is: a heat exchanger tube box with enhanced sealing function, the structure of which includes a box plate, two internal partitions, mounting holes, and heat exchange tubes, and further includes a blocking rubber ring unit disposed on the mounting holes and used to abut against the end face of the heat exchange tubes, a fixing frame unit disposed on the inner side of the box plate, and a positioning rubber ring unit disposed on the fixing frame unit and used to abut against the opposite side of the internal partitions.

[0010] A further preferred technical solution is that the blocking rubber ring unit includes a fixing ring disposed on the mounting hole, and a circular rubber ring disposed on the side of the fixing ring and used to abut against the end face of the heat exchange tube.

[0011] A further preferred technical solution includes: a welding block disposed on the opposite sides of the internal partition and on the outer ring surface of the heat exchange tube, which is used to abut against the circular rubber ring and the heat exchange tube.

[0012] A further preferred technical solution is that the fixed frame unit includes a rectangular frame disposed on the inner side of the box plate, and mounting bolts disposed on the rectangular frame and used to connect the box plate.

[0013] A further preferred technical solution includes a threaded groove provided on the inner side of the housing plate for providing the mounting bolts.

[0014] A further preferred technical solution is that the positioning rubber ring unit includes a vertical plate disposed on the rectangular frame, a fluid inlet disposed on the vertical plate, rectangular limiting frames disposed on two sides of the vertical plate respectively, and a rectangular rubber ring sleeved on the rectangular limiting frames and used to abut against the internal partition.

[0015] A further preferred technical solution is that it also includes a rectangular reinforcing frame disposed on the opposite sides of the internal partition.

[0016] A further preferred technical solution is that the fixed frame unit further includes bolt holes disposed on the rectangular frame and used for mounting bolts.

[0017] A further preferred technical solution includes an opening for mounting hook connection of the blocking rubber ring unit, which is provided on the rectangular reinforcing frame and used to compress the heat exchange tube and the two internal partitions during installation.

[0018] A further preferred technical solution is that, in the two rectangular reinforcement frames, the length and width dimensions of the inner rectangular outline of one of the rectangular reinforcement frames are greater than the length and width dimensions of the outer rectangular outline of the other rectangular reinforcement frame.

[0019] The beneficial effects of this application include at least the following three points.

[0020] First, the heat exchanger tube box has rubber ring structures with relatively high sealing degree and relatively low disassembly and assembly difficulty between the shell plate and the internal partition, and between the internal partition and the heat exchange tube. This significantly improves the sealing degree between the shell side and the tube side, ensuring that the shell side material and the tube side material are not easily interpenetrated, thus improving the safety of heat exchange operation.

[0021] Secondly, the internal baffles and heat exchange tubes can be installed without a lot of welding work, making the heat exchanger tube box relatively simple and convenient to disassemble and assemble.

[0022] Third, the rectangular reinforced frame with openings for mounting hook connection can not only appropriately prevent the internal partition from being bent and deformed by the positioning rubber ring unit, but also make the internal partition and heat exchange tube relatively simple and efficient to assemble in advance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Figure 2 This is a schematic diagram showing the location of the rectangular reinforcement frame in this application.

[0025] Figure 3 This is a schematic diagram showing the positions of the fixed frame unit and the positioning rubber ring unit in this application.

[0026] Figure 4 This is a structural schematic diagram of the fixed frame unit in this application.

[0027] Figure 5 This is a partial structural diagram of the positioning rubber ring unit in this application.

[0028] Figure 6 This is a schematic diagram of the position and structure of the blocking rubber ring unit in this application.

[0029] Figure 7 This is a schematic diagram showing the location and shape of the opening for the hook connection in the installation state in this application.

[0030] Figure 8 This is a schematic diagram illustrating the usage of the mounting hook opening in this application.

[0031] Figure 9 This is a schematic diagram showing the location of the threaded groove in this application.

[0032] Figure 10 This is a schematic diagram of the idle state of the tensioning tool in this application.

[0033] Figure 11 This is a schematic diagram of the circular rubber ring in the ready-to-use state in this application.

[0034] The meanings of the markings in the diagram are as follows.

[0035] Tensioning tool a, hook a-1, elastic rope a-2;

[0036] 11. Housing plate, 12. Internal partition, 13. Mounting hole, 14. Heat exchange tube, 15. Shell-side connecting pipe, 16. Tube-side opening, 17. Housing plate reinforcement frame.

[0037] 1. Blocking rubber ring unit; 2. Fixing frame unit; 3. Positioning rubber ring unit; 4. Weld block; 5. Threaded groove; 6. Rectangular reinforcing frame; 7. Opening for hook connection in installation state.

[0038] Fixed ring 101, circular rubber ring 102;

[0039] Rectangular frame 201, mounting bolt 202, bolt hole 203;

[0040] Vertical plate 301, fluid inlet 302, rectangular limiting frame 303, rectangular rubber ring 304. Detailed Implementation

[0041] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0042] like Figures 1-11 As shown, a heat exchanger tube box with enhanced sealing function includes a box plate 11, two internal partitions 12, mounting holes 13, and heat exchange tubes 14. It also includes a blocking rubber ring unit 1 disposed on the mounting holes 13 and used to abut against the end face of the heat exchange tubes 14, a fixing frame unit 2 disposed on the inner side of the box plate 11, and a positioning rubber ring unit 3 disposed on the fixing frame unit 2 and used to abut against the opposite side of the internal partitions 12.

[0043] In this embodiment, the aforementioned sealing degree refers to the sealing degree between the shell side and the tube side, not the sealing degree between the shell side and the atmospheric environment. The improved structure for enhancing the sealing degree described above does not conflict with any subsequent improved structures for enhancing the sealing degree between the shell side and the atmospheric environment.

[0044] The main body of the heat exchanger tube box is made of fluoroplastic or stainless steel, while the rubber rings of the blocking rubber ring unit 1 and the positioning rubber ring unit 3 are made of fluororubber, silicone rubber, or EPDM rubber. Along the length of the heat exchange tube 14, the fixing frame unit 2 is fixedly connected to the box plate 11, the positioning rubber ring unit 3 is fully abutting against the internal partition 12, the blocking rubber ring unit 1 is fixedly connected to the internal partition 12, and the blocking rubber ring unit 1 is also fully abutting against the heat exchange tube 14. Therefore, gaps and holes are unlikely to be left between the box plate 11 and the internal partition 12, or between the internal partition 12 and the heat exchange tube 14, ensuring that the shell-side material and the tube-side material do not easily permeate each other, ultimately significantly improving the safety of the heat exchange operation.

[0045] On the other hand, when the housing plate 11 and the internal partition 12 are assembled, no welding operation is required. When the internal partition 12 is assembled with the heat exchange tube 14, it is not necessary to weld on each heat exchange tube 14. Therefore, the ease of disassembly and assembly of the heat exchanger tube box is greatly improved.

[0046] Specifically, the heat exchanger tube box consists of: 6 box plates 11, 2 internal partitions 12, dozens or even hundreds of heat exchange tubes 14, a blocking rubber ring unit 1 corresponding to the heat exchange tubes 14 in terms of position and number, 2 fixed frame units 2, and 2 positioning rubber ring units 3.

[0047] Finally, the two internal partitions 12 and all the heat exchange tubes 14 can be pre-assembled in the factory as part of the prefabricated heat exchanger tube box, while the fixed frame unit 2 and the positioning rubber ring unit 3 are integrally molded. Therefore, for users of this heat exchanger tube box, it also has the outstanding advantage of convenient and quick assembly and disassembly.

[0048] The blocking rubber ring unit 1 includes a fixing ring 101 disposed on the mounting hole 13, and a circular rubber ring 102 disposed on the side of the fixing ring 101 and used to abut against the end face of the heat exchange tube 14.

[0049] In this embodiment, the fixing ring 101 and the internal partition 12 are integrally formed. The former is relatively closer to the opposite side of the internal partition 12, and may even be flush with the opposite side. This allows for more insertion depth of the heat exchange tube 14 at the mounting hole 13, which is beneficial for the stable installation of the heat exchange tube 14.

[0050] Before the heat exchange tube 14 is installed in the mounting hole 13, the circular rubber ring 102 is first placed in the mounting hole 13 and placed on the fixing ring 101. After all the heat exchange tubes 14 and the circular rubber ring 102 are initially installed, the two internal partitions 12 are brought close to each other and the above-mentioned closeness distance is maintained. The installation operation of all heat exchange tubes 14 and circular rubber rings 102 can be completed in one step, which is very convenient and efficient.

[0051] The heat exchanger tube box also includes welding blocks 4 disposed on the opposite sides of the internal partition 12 and on the outer ring surface of the heat exchange tube 14, and used to abut against the circular rubber ring 102 and the heat exchange tube 14.

[0052] In this embodiment, it is not necessary to provide the welding block 4 on each of the heat exchange tubes 14. A number of relatively evenly distributed welding blocks 4 are sufficient to ensure that the aforementioned proximity distance between the two internal partitions 12 can be maintained stably for a long time.

[0053] For example, on all the heat exchange tubes 14 arranged horizontally and vertically, only the outermost ring of heat exchange tubes 14 is provided with welding blocks 4. Two welding blocks 4 of appropriate size are provided on each of the heat exchange tubes 14, so that the overall structure of the two internal partitions 12 and all the heat exchange tubes 14 can be finally and firmly connected.

[0054] The fixed frame unit 2 includes a rectangular frame 201 disposed on the inner side of the box plate 11, and mounting bolts 202 disposed on the rectangular frame 201 and used to connect the box plate 11.

[0055] In this embodiment, when the heat exchanger is in normal use, the length direction of the heat exchange tube 14 is transverse. Correspondingly, the general flow direction of the shell-side material is vertical, and the general flow direction of the tube-side material is transverse. Two shell-side connecting pipes 15 are respectively arranged on the top and bottom housing plates 11; two tube-side openings 16 are arranged on the left and right, and their specific height positions are not fixed.

[0056] The four outer sides of the rectangular frame 201 fully fit the inner sides of the four box panels 11 (top, bottom, front, and back). A rubber sealing ring is not required at this location because:

[0057] First, the rectangular frame 201 itself has a relatively large width, and after it fully abuts against the inner side of the box plate 11, a relatively sufficient degree of sealing can be obtained;

[0058] Secondly, if a rubber sealing ring is provided between the outer side of the rectangular frame 201 and the inner side of the box plate 11, it will interfere with the position of the mounting bolt 202, thereby increasing the complexity of installing the mounting bolt 202.

[0059] In addition, the mounting bolts 202 are provided on all four sides of the rectangular frame 201.

[0060] The heat exchanger tube box also includes a threaded groove 5 provided on the inner side of the box plate 11 for providing the mounting bolts 202.

[0061] In this embodiment, the inner sides of the four box plates 11 (top, bottom, front, and back) are provided with threaded grooves 5, and the outer sides of the two box plates 11 (front and back) are also provided with the box plate reinforcement frame 17, which can be "cross-shaped" or "grid-shaped".

[0062] The positioning rubber ring unit 3 includes a vertical plate 301 disposed on the rectangular frame 201, a fluid inlet 302 disposed on the vertical plate 301, rectangular limiting frames 303 disposed on two sides of the vertical plate 301 respectively, and a rectangular rubber ring 304 sleeved on the rectangular limiting frame 303 and used to abut against the internal partition 12.

[0063] In this embodiment, the rectangular frame 201, the vertical plate 301, and the rectangular limiting frame 303 are integrally formed, and both the vertical plate 301 and the fluid passage 302 are rectangular in shape. Along the length of the heat exchange tube 14, the thickness of the rectangular limiting frame 303 is smaller than that of the rectangular rubber ring 304, preventing the former from contacting or damaging the internal partition 12.

[0064] When all the mounting bolts 202 are correctly installed on the corresponding threaded grooves 5, the rectangular rubber ring 304 and the circular rubber ring 102 have obtained sufficient and appropriate compression strength, preventing material from penetrating between the two.

[0065] It should be noted that if the two internal partitions 12 and all the heat exchange tubes 14 are integrally formed, i.e., molded together, the sealing degree is naturally higher than that of the method using the circular rubber ring 102. However, the cost of the integral forming is relatively high, which is one of the reasons why the method using the circular rubber ring 102 has outstanding practicality and efficiency.

[0066] Furthermore, the rectangular rubber ring 304 does not need to be sealed against the rectangular limiting frame 303 or the housing plate 11. Therefore, the width of the rectangular rubber ring 304 can be relatively small.

[0067] The heat exchanger tube box also includes a rectangular reinforcing frame 6 disposed on the opposite sides of the internal partition 12.

[0068] In this embodiment, the first function of the rectangular reinforced frame 6 is:

[0069] The plate-like structure of the internal partition 12 is upgraded to a frame structure, making it more difficult to bend, thereby preventing the positioning rubber ring unit 3 from bending it, and ultimately ensuring that the compression deformation sealing strength at the rectangular rubber ring 304 is sufficient.

[0070] All of the heat exchange tubes 14 are located inside the rectangular reinforcing frame 6. The rectangular reinforcing frame 6 is set relatively close to the side of the internal partition 12, that is, its own length and width are relatively large, slightly smaller than the length and width of the internal partition 12.

[0071] The fixed frame unit 2 also includes bolt holes 203 disposed on the rectangular frame 201 and used for mounting bolts 202.

[0072] In this embodiment, 5-10 bolt holes 203 are provided on a single side of the rectangular frame 201.

[0073] The heat exchanger tube box also includes an installation hook hole 7, which is set on the rectangular reinforcing frame 6 and is used to squeeze the blocking rubber ring unit 1 when installing the heat exchange tube 14 and the two internal partitions 12.

[0074] In this embodiment, the method of using the mounting hook-and-connection opening 7 and its advantages are as follows:

[0075] After the two internal partitions 12, all the heat exchange tubes 14, and all the circular rubber rings 102 have been aligned and installed, the tensioning tool a can be hooked onto the two corresponding mounting hook openings 7 on the left and right sides, so that the circular rubber rings 102 are fully and appropriately compressed. Then, spot welding is done on a portion of the heat exchange tubes 14 to fix the heat exchange tubes 14 and the internal partitions 12. Finally, the tensioning tool a can be removed. This ensures that the overall structure composed of the internal partitions 12 and the heat exchange tubes 14 can be pre-installed simply, efficiently, and appropriately. This heat exchanger has the advantages of an assembled structure.

[0076] Specifically, the tensioning tool a has a common structural composition, with one hook a-1 at each end and an elastic rope a-2 made of rubber in the middle. One to two mounting hook openings 7 are provided on one side of the rectangular reinforcing frame 6, meaning that a maximum of eight tensioning tools a are required.

[0077] It should be noted that:

[0078] First, the tensioning tool a provides sufficient and appropriate pressure on the circular rubber ring 102. When the internal partition 12 and the heat exchange tube 14 are installed and connected, the fixed frame unit 2 no longer significantly compresses the circular rubber ring 102, but only compresses the rectangular rubber ring 304.

[0079] Second, when the heat exchanger tube box is in normal use, the tensioning tool a is not inside it;

[0080] Third, during storage and transportation of the heat exchanger tube box, both ends of the tensioning tool a can be hooked onto any two of the mounting hook connection holes 7 to prevent it from falling off or being lost. In other words, the tensioning tool a is included as a complimentary tool when the heat exchanger tube box is sold. For details, please refer to the appendix. Figure 10 .

[0081] In the two rectangular reinforcement frames 6, the length and width of the inner rectangular outline of one of the rectangular reinforcement frames 6 are greater than the length and width of the outer rectangular outline of the other rectangular reinforcement frame 6.

[0082] In this embodiment, the two rectangular reinforcing frames 6 are arranged in a large and a small manner, so that when the heat exchanger tube box is stored and transported, the two internal partitions 12 can be connected by the two rectangular reinforcing frames 6, and all the circular rubber rings 102 are placed in the connection space, thereby preventing the circular rubber rings 102 from falling off and being lost. This is very practical.

[0083] Correspondingly, the outer diameter of the circular rubber ring 102 is larger than the inner diameter of the fixing ring 101, making it less likely for the former to fall out at the latter's position. See the attached diagram for details. Figure 11 .

[0084] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A heat exchanger tube box with enhanced sealing function, comprising a box body plate (11), two internal partitions (12), mounting holes (13), and heat exchange tubes (14), characterized in that: It also includes a blocking rubber ring unit (1) disposed on the mounting hole (13) and used to abut against the end face of the heat exchange tube (14), a fixing frame unit (2) disposed on the inner side of the housing plate (11), and a positioning rubber ring unit (3) disposed on the fixing frame unit (2) and used to abut against the opposite side of the internal partition (12).

2. A heat exchanger tube box with enhanced sealing function according to claim 1, characterized in that: The blocking rubber ring unit (1) includes a fixed ring (101) disposed on the mounting hole (13) and a circular rubber ring (102) disposed on the side of the fixed ring (101) and used to abut against the end face of the heat exchange tube (14).

3. A heat exchanger tube box with enhanced sealing function according to claim 2, characterized in that: It also includes a welding block (4) disposed on the opposite side of the internal partition (12) and on the outer ring surface of the heat exchange tube (14), and used to abut against the circular rubber ring (102) and the heat exchange tube (14).

4. A heat exchanger tube box with enhanced sealing function according to claim 1, characterized in that: The fixed frame unit (2) includes a rectangular frame (201) disposed on the inner side of the box plate (11), and mounting bolts (202) disposed on the rectangular frame (201) and used to connect the box plate (11).

5. A heat exchanger tube box with enhanced sealing function according to claim 4, characterized in that: It also includes a threaded groove (5) provided on the inner side of the housing plate (11) for providing the mounting bolt (202).

6. A heat exchanger tube box with enhanced sealing function according to claim 4, characterized in that: The positioning rubber ring unit (3) includes a vertical plate (301) disposed on the rectangular frame (201), a fluid inlet (302) disposed on the vertical plate (301), rectangular limiting frames (303) disposed on two sides of the vertical plate (301) respectively, and a rectangular rubber ring (304) sleeved on the rectangular limiting frame (303) and used to abut against the internal partition (12).

7. A heat exchanger tube box with enhanced sealing function according to claim 1, characterized in that: It also includes a rectangular reinforcing frame (6) disposed on the opposite sides of the internal partition (12).

8. A heat exchanger tube box with enhanced sealing function according to claim 4, characterized in that: The fixed frame unit (2) also includes bolt holes (203) disposed on the rectangular frame (201) and used for mounting bolts (202).

9. A heat exchanger tube box with enhanced sealing function according to claim 7, characterized in that: It also includes an installation hook opening (7) provided on the rectangular reinforcing frame (6) and used to squeeze the blocking rubber ring unit (1) when the heat exchange tube (14) and the two internal partitions (12) are installed.

10. A heat exchanger tube box with enhanced sealing function according to claim 7, characterized in that: In the two rectangular reinforcement frames (6), the length and width of the inner rectangular outline of one of the rectangular reinforcement frames (6) are greater than the length and width of the outer rectangular outline of the other rectangular reinforcement frame (6).

Images