A tube sheet structure based on hastelloy backing plate and heat exchanger

Abstract

The utility model discloses a kind of tube sheet structure based on hastelloy liner, including tube sheet body and hastelloy liner;The tube sheet body is provided with several uniform distribution installation holes for installing heat exchange tube, and the lower end surface of the tube sheet body is provided with a layer of hastelloy liner, and the hastelloy liner is provided with several uniform distribution lining pipes, the position of the lining pipe corresponds with installation hole position, the outer diameter size of lining pipe and the inner diameter size of installation hole are adapted, and the lining pipe is inserted into installation hole from lower end corresponding.The device is provided with installation hole on the tube sheet body, and hastelloy liner is arranged at the inner side end surface of the tube sheet body, the lining pipe arranged on the hastelloy liner is correspondingly embedded in installation hole, and the hastelloy has strong corrosion resistance, high temperature resistance, high strength and good plasticity, which can effectively protect the tube sheet body and the heat exchange tube inside, effectively improve the service life and heat exchange efficiency of heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a tube sheet structure and heat exchanger based on Hastelloy liner. Background Technology

[0002] In existing technologies, heat exchangers typically consist of upper and lower tube sheets and heat exchange tubes in the middle. For example, the "Tantalum Shell-and-Tube Heat Exchanger" disclosed in publication number CN222670774U uses heat exchange tubes installed in the middle. In existing technologies, the middle heat exchange tubes are usually welded and fixed. However, heat exchangers often need to be circulated with corrosive media, which can easily affect the performance of the heat exchange tubes, especially the welded parts, significantly impacting their lifespan and the overall lifespan of the heat exchanger. Therefore, the connection and installation of the heat exchange tubes to the tube sheet is crucial. Existing technologies use tantalum material for the heat exchange tubes, as tantalum has excellent corrosion resistance and high-temperature resistance, effectively improving their lifespan. However, even with corrosion-resistant materials, the actual installation of the heat exchange tubes and tube sheet still presents certain challenges.

[0003] Since most existing tantalum materials and highly corrosion-resistant materials are not metallic, they cannot be fixed by welding. Instead, the installation of heat exchange tubes is achieved through mechanical design and other structural methods. For example, the "tube sheet structure in a tantalum heat exchanger" disclosed in application publication number CN105202964A uses forced expansion and compression of the heat exchange tubes to fix the internal tantalum material, eliminating the need for welding. However, this technical solution has certain drawbacks. The mounting hole structure is too simple, with the tantalum liner directly inserted through the hole and the heat exchange tube directly inserted into it. The internal tantalum liner is fixed entirely by expansion force in one direction, which poses certain installation risks. The overall structure is unstable, lacks sufficient sealing, and is prone to leakage. Furthermore, the internal liner is prone to shaking and is not stable enough.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a tube sheet structure and heat exchanger based on Hastelloy liner that has a reasonable structure, improves sealing performance, and has a stable structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a tube sheet structure and heat exchanger based on Hastelloy liners; the technical solution is as follows:

[0006] A tube sheet structure based on Hastelloy liners includes a tube sheet body and a Hastelloy liner. The tube sheet body has a plurality of evenly distributed mounting holes for installing heat exchange tubes, and a Hastelloy liner is provided on the lower end face of the tube sheet body. The Hastelloy liner is provided with a plurality of evenly distributed liner tubes, the positions of the liner tubes corresponding to the positions of the mounting holes, the outer diameter of the liner tubes matching the inner diameter of the mounting holes, and the liner tubes extending from the lower end into the mounting holes.

[0007] Furthermore, the mounting holes on the tube sheet are all designed with a "convex" shape, and the corresponding liner inserted into the mounting hole is also designed with a "convex" shape.

[0008] Furthermore, a vertical positioning groove is provided at the lateral end position of the mounting hole, and a corresponding positioning block is provided on the liner. The liner is inserted into the mounting hole, and the positioning block is embedded in the positioning groove.

[0009] Furthermore, the Hastelloy liner is provided with a vertical positioning groove, and the lower end face of the tube sheet body is provided with a positioning block corresponding to the position of the positioning groove. When the Hastelloy liner is installed, the positioning block on the Hastelloy liner is correspondingly embedded into the positioning groove on the lower end face of the tube sheet body.

[0010] Furthermore, the positioning groove is configured as a circular groove structure or a ring-shaped groove structure; the positioning block is correspondingly configured as a circular cylindrical structure.

[0011] Furthermore, an annular groove is provided at the lower end face of the tube sheet body, and a ring of evenly distributed threaded holes is provided at the outer edge.

[0012] Furthermore, the mounting hole is provided at the middle position of the tube sheet body, and the Hastelloy alloy liner on the lower end face of the tube sheet body extends to the position of the annular groove.

[0013] This utility model also provides a heat exchanger based on a tube sheet structure with Hastelloy alloy liners, including upper and lower tube sheet bodies. Each tube sheet body has a convex mounting hole at its center, an annular groove on its outer side, and a ring of evenly distributed threaded holes at its outer edge. Hastelloy alloy liners are provided on the corresponding end faces of the upper and lower tube sheet bodies. Liners extending into the mounting holes are provided on the Hastelloy alloy liners, and the liner tubes are configured with corresponding convex structures. Heat exchange tubes are provided between the upper and lower tube sheets, with their upper and lower ends also configured with corresponding convex structures. The upper and lower ends of the heat exchange tubes are inserted into the mounting holes of the upper and lower tube sheet bodies. Annular side plates are installed in the annular grooves of the upper and lower tube sheet bodies, and threaded rods are installed in the threaded holes of the upper and lower tube sheet bodies. Fastening bolts are installed on the threaded rods, and the upper and lower tube sheet bodies are pressed and fixed by the fastening bolts, thereby pressing and fixing the side plates and the internal heat exchange tubes. The heat exchange tubes, in turn, press and fix the liner tubes in the mounting holes.

[0014] Furthermore, evenly distributed positioning grooves are provided at the corresponding end faces of the upper and lower tube sheet bodies, and positioning blocks with corresponding positions are provided on the Hastelloy liner. Pressure plates with corresponding positions are provided at the upper and lower ends of the heat exchange tube. When the upper and lower ends of the heat exchange tube are pressed into the mounting hole, the pressure plates press the Hastelloy liner accordingly, pressing the positioning blocks on the Hastelloy liner into the positioning grooves.

[0015] Beneficial effects: This utility model has the following beneficial effects:

[0016] 1) In this device, mounting holes are provided on the tube sheet body, and Hastelloy alloy liner is provided on the inner end face of the tube sheet body. The liner tubes provided on the Hastelloy alloy liner are correspondingly embedded in the mounting holes. Hastelloy has strong corrosion resistance, high temperature resistance, high strength and good plasticity, which can effectively protect the tube sheet body and the internal heat exchange tubes, and effectively improve the service life and heat exchange efficiency of the heat exchanger.

[0017] 2) The mounting holes on the tube sheet body and the liner tubes on the Hastelloy liner in this device are all convex. Through the convex design, when the upper and lower ends of the heat exchange tubes are installed by the expansion method, the installation stability of the heat exchange tubes can be further increased, the sealing performance can be increased, and the structure is more reasonable.

[0018] 3) The device is also equipped with a structural component of positioning groove and positioning block. The convex structure of the mounting hole and the liner allows the horizontal part inside to be set with a corresponding vertical positioning groove, while the liner can be set with a corresponding positioning block. After the two are installed, the liner can be prevented from rotating in the mounting hole, increasing the sealing and stability. The structure is ingenious and reasonable.

[0019] 4) In this device, corresponding pressure plates are also set at the upper and lower ends of the heat exchange tubes. The positioning blocks on the Hastelloy liner correspond to the positioning grooves on the tube sheet body. The pressure plates can press the positioning blocks into the positioning grooves to fix the Hastelloy liner. The structure is reasonably designed. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the tube sheet of this utility model;

[0021] Figure 2 for Figure 1 Separation diagram of the tube sheet body and Hastelloy liner;

[0022] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 1 Enlarged view at point B in the middle;

[0024] Figure 5 for Figure 2 C-direction view;

[0025] Figure 6 This is a structural diagram of the heat exchanger of this utility model;

[0026] Figure 7 for Figure 6 Enlarged view at point D;

[0027] The components include: tube sheet body 1, Hastelloy liner 2, heat exchange tube 3, mounting hole 4, liner 5, positioning groove 6, positioning block 7, annular groove 8, threaded hole 9, side plate 10, threaded rod 11, and fastening bolt 12. Detailed Implementation

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0029] like Figure 1 As shown, a tube sheet structure based on Hastelloy liner includes a tube sheet body 1 and a Hastelloy liner 2. The tube sheet body 1 is provided with a plurality of evenly distributed mounting holes 4 for installing heat exchange tubes 3, and a layer of Hastelloy liner 2 is provided on the lower end face of the tube sheet body 1. The Hastelloy liner 2 is provided with a plurality of evenly distributed liner tubes 5, the positions of the liner tubes 5 correspond to the positions of the mounting holes 4, the outer diameter of the liner tubes 5 is adapted to the inner diameter of the mounting holes 4, and the liner tubes 5 extend into the mounting holes 4 from the lower end.

[0030] like Figure 2As shown, the mounting holes 4 on the tube sheet are all designed with a "convex" shape, and the corresponding liner 5 inserted into the mounting holes 4 is also designed with a "convex" shape.

[0031] like Figure 3 As shown, a vertical positioning groove 6 is provided at the horizontal end position inside the mounting hole 4, and a positioning block 7 corresponding to the position is provided on the liner 5. The liner 5 is inserted into the mounting hole 4, and the positioning block 7 is embedded in the positioning groove 6.

[0032] like Figure 4 As shown, the Hastelloy liner 5 is provided with a vertical positioning groove 6, and the lower end face of the tube sheet body 1 is provided with a positioning block 7 corresponding to the position of the positioning groove 6. When the Hastelloy liner 2 is installed, the positioning block 7 on the Hastelloy liner 2 is correspondingly embedded into the positioning groove 6 on the lower end face of the tube sheet body 1.

[0033] The positioning groove 6 is set as a circular groove structure or a ring-shaped groove structure; the positioning block 7 is set as a corresponding circular cylindrical structure.

[0034] like Figure 5 As shown, an annular groove 8 is provided at the lower end face of the tube sheet body 1, and a ring of evenly distributed threaded holes 9 is provided at the outer edge.

[0035] There are 24 mounting holes 4 at the middle position of the tube sheet body 1, and the Hastelloy liner 2 on the lower end face of the tube sheet body 1 extends to the position of the annular groove 8.

[0036] like Figure 6 As shown, this utility model also provides a heat exchanger based on a tube sheet structure with Hastelloy alloy liners, including upper and lower tube sheet bodies 1. Each tube sheet body 1 has a convex mounting hole 4 at its center, an annular groove 8 on its outer side, and a ring of evenly distributed threaded holes 9 at its outer edge. Hastelloy alloy liners 2 are provided on the corresponding end faces of the upper and lower tube sheet bodies 1. Liner tubes 5, extending into the mounting holes 4, are provided on the Hastelloy alloy liners. The liner tubes 5 are configured with corresponding convex structures, and heat exchange tubes 3 are arranged between the upper and lower tube sheets. The upper and lower ends of the heat exchange tube 3 are also set with corresponding "convex" structures. The upper and lower ends of the heat exchange tube 3 are inserted into the mounting holes 4 of the upper and lower tube sheet bodies 1. The annular side plates 10 are installed in the annular grooves 8 of the upper and lower tube sheet bodies 1, and the threaded rods 11 are installed in the threaded holes 9 of the upper and lower tube sheet bodies 1. Fastening bolts 12 are installed on the threaded rods 11. The upper and lower tube sheet bodies 1 are pressed and fixed by the fastening bolts 12, so that the side plates 10 and the heat exchange tubes 3 inside are pressed and fixed. The heat exchange tubes 3 then press and fix the liner 5 in the mounting holes 4.

[0037] like Figure 7As shown, evenly distributed positioning grooves 6 are provided at the corresponding end faces of the upper and lower tube sheet bodies 1, and positioning blocks 7 with corresponding positions are provided on the Hastelloy liner 2. Pressure plates 13 with corresponding positions are provided at the upper and lower ends of the heat exchange tube 3. When the upper and lower ends of the heat exchange tube 3 are pressed into the mounting hole 4, the pressure plate 13 presses down on the Hastelloy liner 2, pressing the positioning blocks 7 on the Hastelloy liner 2 into the positioning grooves 6.

[0038] The technical solution of this device differs from existing technologies in that a Hastelloy alloy liner 2 is installed at the junction of the heat exchanger and the tube sheet body 1. Hastelloy has strong corrosion resistance: Hastelloy tube sheets exhibit excellent corrosion resistance, high temperature resistance, high strength, and good plasticity to most corrosive media in both oxidized and reduced states. They possess high tensile strength and good elongation, making them less prone to cracking or deformation under pressure and stress. They maintain stable performance at high temperatures and are less prone to softening, deformation, or performance degradation due to high temperatures. Therefore, they are non-... The liner plate, which is commonly used in the design of cost-effective devices, is used to connect and install the heat exchange tube 3. In this device's technical solution, the mounting hole 4 is correspondingly designed as a convex shape, essentially a two-stage stepped hole structure. Simultaneously, a liner tube 5, corresponding to the position of the mounting hole 4, is provided on the Hastelloy liner plate 2. The size of the liner tube 5 needs to be appropriately set; the outer diameter of the liner tube 5 must match the outer diameter of the mounting hole 4, and it also needs to be designed as a convex shape. The liner tube 5 can then be inserted into the mounting hole 4. However, the liner tube 5 is not directly fixed in the mounting hole 4 at this point; rather, it is fixed through the installation of the heat exchange tube 3. In this device, the upper and lower... Heat exchange tubes 3 need to be installed between the tube sheet bodies 1. Normally, the heat exchange tubes 3 only need to be welded and fixed between the upper and lower tube sheets. However, in this device, because a liner 5 is installed within the mounting hole 4, the heat exchange tubes 3 cannot be fixed by welding. This device mainly achieves the installation of the heat exchange tubes 3 through expansion and compression. First, the upper and lower ends of the heat exchange tubes 3 need to be designed as convex structures with corresponding dimensions to facilitate expansion and compression. After inserting the upper and lower ends of the heat exchange tubes 3 into the mounting hole 4, the annular side plates are then installed in the annular groove 8. The threaded holes 9 on the upper and lower tube sheet bodies 1 are correspondingly installed... After installing the threaded rod and fastening bolts on it, the two tube sheet bodies 1 are tightened and fixed by the fastening bolts. Then, the internal heat exchange tubes 3 gradually expand and press against the liner tubes 5, achieving sealing and fixation. The entire heat exchanger is then installed. Since the upper and lower ends of the heat exchange tubes 3 are protected by Hastelloy liner tubes 5, the corrosion resistance and high temperature resistance are significantly improved, as are the service life of the heat exchanger, the sealing performance of the heat exchange tubes 3, and their service life. Furthermore, since the mounting holes 4 and the liner tubes 5 are both convex stepped structures, the sealing performance and stability are significantly improved after expansion. The structural design is very reasonable.

[0039] Furthermore, the technical solution of this device further enhances the installation sealing and stability of the heat exchange tube 3. Since both the mounting hole 4 and the liner 5 in this device are designed with a convex structure, a ring-shaped horizontal portion is formed within the mounting hole 4. A vertical positioning groove 6 can then be installed in this horizontal portion, and a corresponding positioning block 7 can be installed on the liner 5. Figure 3 As shown, during the installation of the liner 5, the positioning block 7 is inserted into the positioning groove 6. This serves two purposes: firstly, it positions the liner 5, allowing it to be smoothly inserted into the mounting hole 4; secondly, it prevents the liner 5 from rotating within the mounting hole 4, ensuring a more stable and reliable position for the liner 5. Furthermore, the sealing is enhanced after being compressed by the heat exchange tube 3. Additionally, the same positioning groove 6 and positioning block 7 are also incorporated into the heat exchange tube 3. In this device, the Hastelloy liner 2 is located on the inner end of the tube sheet body 1. Since the heat exchange tube 3 is located at the inner end face of the tube sheet body 1, evenly distributed positioning grooves 6 can be set at the inner end face of the tube sheet body 1, and positioning blocks 7 can be set at the corresponding positions of the Hastelloy liner 2. More importantly, pressure plates are set at the upper and lower ends of the heat exchange tube 3. The position of the pressure plates needs to correspond to the position of the Hastelloy liner 2. When the upper and lower ends of the heat exchange tube 3 are pressed into the mounting holes 4 to tighten and fix the liner 5, the corresponding pressure plates will also simultaneously tighten and fix the Hastelloy liner 2 at the end face, thereby achieving double fixation of the liner 5 and the liner. The structural design is very ingenious and reasonable.

[0040] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A tube sheet structure based on Hastelloy liners, characterized in that: The tube sheet body (1) and Hastelloy liner (2) are provided. The tube sheet body (1) is provided with a plurality of evenly distributed mounting holes (4) for installing heat exchange tubes (3). The lower end face of the tube sheet body (1) is provided with a layer of Hastelloy liner (2). The Hastelloy liner (2) is provided with a plurality of evenly distributed liner tubes (5). The position of the liner tubes (5) corresponds to the position of the mounting holes (4). The outer diameter of the liner tubes (5) is adapted to the inner diameter of the mounting holes (4). The liner tubes (5) extend into the mounting holes (4) from the lower end.

2. The tube sheet structure based on Hastelloy liner according to claim 1, characterized in that: The mounting holes (4) on the tube sheet are all set to a "convex" shape, and the corresponding liner (5) inserted into the mounting holes (4) is also set to a "convex" shape.

3. A tube sheet structure based on Hastelloy liner according to claim 2, characterized in that: A vertical positioning groove (6) is provided at the horizontal end position of the mounting hole (4), and a positioning block (7) corresponding to the position is provided on the liner (5). The liner (5) is inserted into the mounting hole (4), and the positioning block (7) is embedded in the positioning groove (6).

4. A tube sheet structure based on Hastelloy liner according to claim 3, characterized in that: The Hastelloy liner (5) is provided with a vertical positioning groove (6), and the lower end face of the tube sheet body (1) is provided with a positioning block (7) corresponding to the position of the positioning groove (6). When the Hastelloy liner (2) is installed, the positioning block (7) on the Hastelloy liner (2) is correspondingly embedded into the positioning groove (6) on the lower end face of the tube sheet body (1).

5. A tube sheet structure based on Hastelloy liner according to claim 4, characterized in that: The positioning groove (6) is set as a circular groove structure or a ring-shaped groove structure; the positioning block (7) is set as a corresponding circular column structure.

6. A tube sheet structure based on Hastelloy liner according to claim 1, characterized in that: The tube sheet body (1) is provided with an annular groove (8) at the lower end face and a ring of evenly distributed threaded holes (9) at the outer edge.

7. A tube sheet structure based on Hastelloy liner according to claim 6, characterized in that: The mounting holes (4) are provided in 24 locations at the middle of the tube sheet body (1), and the Hastelloy liner (2) on the lower end face of the tube sheet body (1) extends to the position of the annular groove (8).

8. A heat exchanger, characterized in that: The tube sheet includes upper and lower tube sheet bodies (1). A convex mounting hole (4) is provided at the center of each tube sheet body (1). An annular groove (8) is provided on the outer side, and a ring of evenly distributed threaded holes (9) is provided at the outer edge. Hastelloy alloy liners (2) are provided on the corresponding end faces of the upper and lower tube sheet bodies (1). Liners (5) extending into the mounting holes (4) are provided on the Hastelloy alloy liners. The liners (5) are configured with corresponding convex structures. A heat exchange tube (3) is provided between the upper and lower tube sheets. The upper and lower ends of the heat exchange tube (3) are also configured with corresponding convex shapes. The structure is such that the upper and lower ends of the heat exchange tube (3) are inserted into the mounting holes (4) of the upper and lower tube sheet bodies (1), and the annular side plate (10) is installed in the annular groove (8) of the upper and lower tube sheet bodies (1), and the threaded rod (11) is installed in the threaded hole (9) of the upper and lower tube sheet bodies (1). The threaded rod (11) is equipped with a fastening bolt (12). The upper and lower tube sheet bodies (1) are pressed and fixed by the fastening bolt (12), so that the side plate (10) and the heat exchange tube (3) inside are pressed and fixed, and the heat exchange tube (3) presses and fixes the liner (5) in the mounting hole (4) accordingly.

9. A heat exchanger according to claim 8, characterized in that: The upper and lower tube sheet bodies (1) are provided with evenly distributed positioning grooves (6) at their corresponding end faces, and the Hastelloy liner (2) is provided with a corresponding positioning block (7). The upper and lower ends of the heat exchange tube (3) are provided with corresponding pressure plates (13). When the upper and lower ends of the heat exchange tube (3) are pressed into the mounting hole (4), the pressure plate (13) presses down on the Hastelloy liner (2) and presses the positioning block (7) on the Hastelloy liner (2) into the positioning groove (6).

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