A heat exchanger tube box

Abstract

This invention provides a heat exchanger tube box, relating to the field of heat exchanger technology, comprising: a shell, a tube bundle sheet, a tube box sealing disc, a load application assembly, and a load transfer assembly. A cavity for accommodating the shell-side medium is formed between the tube bundle sheet and the tube box sealing disc. The load application assembly applies a clamping force to the tube box sealing disc and the tube bundle sheet; the load transfer assembly transfers the clamping force to the tube bundle sheet. This heat exchanger tube box simplifies the structure of a high-pressure threaded locking ring type heat exchanger tube box, facilitating the disassembly and assembly of internal components and improving maintenance efficiency. It also optimizes the application and transfer path of the clamping load, ensuring the tube sheet's sealing performance and reducing the risk of internal leakage in the heat exchanger.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and more specifically, relates to a heat exchanger tube box. Background Technology

[0002] High-pressure threaded locking ring heat exchangers are a type of complex high-pressure heat exchanger widely used in the petrochemical and oil refining industries. They mainly come in two types: "high-high pressure" and "high-low pressure". In existing high-high pressure threaded locking ring heat exchangers, the clamping bolts, which are the elements that apply the clamping load required for the tube sheet seal, are far from the tube sheet and need to be transmitted through the internal components of the tube box. In addition, there are material temperature expansion differences and operational fluctuations during heat exchanger operation, which can easily cause the load on the tube sheet sealing gasket to decrease and fail to meet the sealing requirements. This can lead to internal leakage of the medium in the tube and shell sides, seriously affecting the process performance of the heat exchanger and even affecting the operation of the unit. Summary of the Invention

[0003] The purpose of this invention is to provide a heat exchanger tube box that solves the problem of internal leakage of the tube and shell-side medium caused by the unreasonable compression load transfer structure of existing high-pressure threaded locking ring heat exchangers.

[0004] To achieve the above objectives, the present invention provides a heat exchanger tube box, comprising:

[0005] A cylindrical body, wherein one end of the cylindrical body is provided with an inwardly extending first extension and a second extension at intervals;

[0006] A tube bundle sheet is disposed inside the cylinder, and a shell-side gasket is provided between the first extension and the tube bundle sheet.

[0007] A pipe box sealing plate is disposed inside the cylinder, and a pipe box sealing gasket is disposed between the second extension and the pipe box sealing plate;

[0008] A load application component is disposed inside the cylinder and outside the tube box sealing disc, and is used to apply a clamping force to the tube box sealing disc and the tube bundle tube sheet through the tube box sealing pressure component and the tube sheet sealing pressure component;

[0009] The load transfer assembly includes a distribution ring, a disc-shaped pressure ring, an inner sleeve end ring, and an inner sleeve, which are sequentially disposed between the tube box sealing disc and the tube bundle sheet.

[0010] Optionally, the load application component includes:

[0011] A pressure-bearing component is threadedly connected to the cylinder body, and the tube box sealing pressure component and the tube sheet sealing pressure component are movably disposed within the pressure-bearing component.

[0012] Optionally, the pipe box sealing and pressing component penetrates the pressure-bearing component and is positioned corresponding to the pipe box sealing gasket. The pipe box sealing and pressing component includes a tightening bolt, a pressure rod, and a pressure ring arranged in sequence.

[0013] Optionally, the tube sheet sealing and top-pressure component penetrates the pressure-bearing component and is positioned corresponding to the distribution ring. The tube sheet sealing and top-pressure component includes a tightening bolt, a pressure rod, and a pressure ring arranged sequentially.

[0014] Optionally, the pressure-bearing component includes:

[0015] A threaded pressure-bearing ring, wherein the threaded pressure-bearing ring is threadedly connected to the cylinder body;

[0016] A pressure cap is disposed inside the threaded pressure ring and connected to the pipe box sealing disc, with its position corresponding to the middle of the pipe box sealing disc;

[0017] The tube box sealing and pressure-pressing component and the tube sheet sealing and pressure-pressing component are disposed within the threaded pressure-bearing ring.

[0018] Optionally, the pressure-bearing component includes:

[0019] A threaded pressure-bearing ring, wherein the threaded pressure-bearing ring is threadedly connected to the cylinder body;

[0020] A pressure cap is disposed inside the threaded pressure ring and connected to the pipe box sealing disc, with its position corresponding to the middle of the pipe box sealing disc;

[0021] The tube box sealing and pressure-pressing component and the tube sheet sealing and pressure-pressing component are respectively disposed inside the threaded pressure-bearing ring and the pressure cap.

[0022] Optionally, it also includes:

[0023] Tube sheet tube-side gasket, wherein the tube sheet tube-side gasket is disposed between the inner sleeve and the tube bundle tube sheet.

[0024] Optionally, it also includes:

[0025] A pipe box sealing disc bracket is disposed in the middle of the pipe box sealing disc, and the outer periphery of the pipe box sealing disc bracket is in limiting contact with the inner periphery of the distribution ring.

[0026] Optionally, the tube box sealing disc is provided with a thinning portion along its circumference, and the thinning portion is disposed between the tube sheet sealing top pressure component and the distribution ring.

[0027] Optionally, the disc-shaped pressure ring protrudes toward the distribution ring.

[0028] The beneficial effects of this invention are as follows: It provides a heat exchanger tube box with a load application component and a load transfer component. The load application component can apply a clamping force to the tube box sealing disc and the tube bundle tube sheet through the tube box sealing pressure component and the tube sheet sealing pressure component, and transfer the sealing load through the load transfer component. The core components of the load transfer component, the distribution ring and the disc-shaped pressure ring, transfer a more uniform, stable and reliable clamping force to the inner sleeve end ring and the inner sleeve, ensuring the clamping and sealing performance of the tube sheet shell side gasket, optimizing the application and transfer path of the clamping load, maintaining an effective sealing load, thereby ensuring the tube sheet sealing performance and reducing the risk of internal leakage of the heat exchanger. This heat exchanger tube box simplifies the structure of the high-pressure threaded locking ring type heat exchanger tube box, which is conducive to the disassembly and assembly of the tube box internals and improves the efficiency of inspection and maintenance.

[0029] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0030] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0031] Figure 1 A schematic diagram of the heat exchanger tube box according to Embodiment 1 of the present invention is shown.

[0032] Figure 2 A partial structural schematic diagram of a heat exchanger tube box according to Embodiment 1 of the present invention is shown.

[0033] Figure 3 A schematic diagram of the heat exchanger tube box according to Embodiment 2 of the present invention is shown.

[0034] Figure 4 A partial structural schematic diagram of a heat exchanger tube box according to Embodiment 2 of the present invention is shown.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Shell; 2. Inner sleeve; 3. Inner sleeve end ring; 4. Tube box sealing gasket; 5. Tube box sealing disc; 6. Threaded pressure ring; 7. Tube box sealing top pressure component; 8. Tube sheet sealing top pressure component; 9. Gland; 10. Tube box sealing disc bracket; 11. Distribution ring; 12. Disc-shaped pressure ring; 13. Tube sheet tube-side gasket; 14. Tube sheet shell-side gasket; 15. Tube bundle tube sheet. Detailed Implementation

[0037] This invention provides a heat exchanger tube box, specifically a threaded locking ring type heat exchanger tube box structure for high-pressure heat exchangers. Through research on the operational characteristics of high-pressure threaded locking ring heat exchanger tube boxes, and considering factors such as structural load-bearing capacity, sealing reliability, and the application and transmission path of the compression load required for gasket sealing, a novel structural design for the threaded locking ring type heat exchanger tube box was implemented. The heat exchanger tube box of this invention achieves significant improvements in technical reliability, economy, and ease of operation and maintenance.

[0038] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0039] Example 1

[0040] like Figure 1 and 2 As shown, this embodiment provides a heat exchanger tube box, including:

[0041] The cylindrical body 1 has an inwardly extending first extension and a second extension formed at one end of the cylindrical body 1 at intervals.

[0042] Tube bundle sheet 15, the tube bundle sheet 15 is disposed inside the cylinder 1, and a tube sheet shell side gasket 14 is disposed between the first extension and the tube bundle sheet 15.

[0043] Pipe box sealing disc 5, the pipe box sealing disc 5 is disposed inside the cylinder 1, and a pipe box sealing gasket 4 is disposed between the second extension and the pipe box sealing disc 5;

[0044] A load application component is disposed inside the cylinder 1 and outside the tube box sealing disc 5, and is used to apply a clamping force to the tube box sealing disc 5 and the tube bundle tube sheet 15 through the tube box sealing top pressure component 7 and the tube sheet sealing top pressure component 8.

[0045] The load transfer assembly includes a distribution ring 11, a disc-shaped pressure ring 12, an inner sleeve end ring 3, and an inner sleeve 2, which are sequentially disposed between the tube box sealing disc 5 and the tube bundle sheet 15.

[0046] Specifically, to address the problem of internal leakage of the tube and shell-side media caused by the unreasonable compression load transfer structure of existing high-pressure threaded locking ring heat exchangers, the heat exchanger tube box provided by this invention has a load application component and a load transfer component. The load application component can apply compression force to the tube box sealing disc 5 and the tube bundle tube sheet 15 through the tube box sealing top pressure component 7 and the tube sheet sealing top pressure component 7, and transfer the sealing load through the load transfer component. The core components of the load transfer component, the distribution ring 11 and the disc-shaped pressure ring 12, transfer a more uniform, stable and reliable compression force to the end ring of the inner sleeve 2 and the inner sleeve 2, ensuring the compression sealing performance of the tube sheet shell-side gasket 14, optimizing the application and transfer path of the compression load, maintaining an effective sealing load, thereby ensuring the tube sheet sealing performance and reducing the risk of internal leakage of the heat exchanger. This heat exchanger tube box simplifies the structure of the high-pressure threaded locking ring heat exchanger tube box, facilitates the disassembly and assembly of the tube box internals, and improves the efficiency of inspection and maintenance.

[0047] In this embodiment, the heat exchanger tube box is a "high-pressure" type threaded locking ring heat exchanger with high operating pressures on both the tube and shell sides. The tube bundle and tube sheet 15 are installed inside the tube box and shell integrated cylindrical body 1. The tube bundle and tube sheet 15 achieves sealing through the fastening load applied by the load application component and the load transfer component. The sealing load is transferred between the tube box sealing disc 5 and the tube bundle and tube sheet 15 by the distribution ring 11, the disc-shaped pressure ring 12, the inner sleeve end ring 3, and the inner sleeve 2 to achieve sealing.

[0048] In this embodiment, the load application component includes:

[0049] The pressure-bearing component is threadedly connected to the cylinder 1, and the tube box sealing and pressure-pressing component 7 and the tube sheet sealing and pressure-pressing component 8 are movably disposed within the pressure-bearing component.

[0050] Specifically, the tube box sealing top pressure component 7 and the tube sheet sealing top pressure component 8 apply clamping force to different parts of the tube box sealing disc 5 respectively. The sealing load applied by the tube box sealing top pressure component 7 is used to press the tube box sealing gasket 4, and the sealing load applied by the tube sheet sealing top pressure component 8 is used to press the tube sheet shell side gasket 14 after being transmitted through the load transfer component.

[0051] In this embodiment, the pipe box sealing and pressing component 7 penetrates the pressure-bearing component and is positioned corresponding to the pipe box sealing gasket 4. The pipe box sealing and pressing component 7 includes a tightening bolt, a pressure rod, and a pressure ring arranged in sequence.

[0052] Specifically, the sealing load provided by the pipe box sealing top pressure component 7 is pressed against the pipe box sealing gasket 4 after passing through the pipe box sealing disc 5. The top bolt, pressure rod and pressure ring are arranged in sequence from the outside to the inside. When the top bolt is tightened, the top bolt moves axially, and the pressure force is transmitted through the movement of the pressure rod, and then the pipe box sealing gasket 4 is pressed evenly through the pressure ring.

[0053] In this embodiment, the tube sheet sealing and top-pressure component 8 penetrates the pressure-bearing component and is positioned corresponding to the distribution ring 11. The tube sheet sealing and top-pressure component 8 includes a top-tightening bolt, a pressure rod, and a pressure ring arranged sequentially.

[0054] Specifically, the sealing load provided by the tube sheet sealing top pressure component 8 is evenly distributed by the distribution ring 11 after passing through the tube box sealing disc 5, further improving the uniformity of the clamping force along the circumference. The top bolt, pressure rod and pressure ring are arranged sequentially from the outside to the inside. When the top bolt is tightened, the top bolt moves axially, and the clamping force is transmitted through the movement of the pressure rod, and then the distribution ring 11 is evenly pressed by the pressure ring.

[0055] In this embodiment, the pressure-bearing component includes:

[0056] A threaded pressure-bearing ring 6 is threadedly connected to the cylinder 1;

[0057] The pressure cap 9 is located inside the threaded pressure ring 6 and is connected to the pipe box sealing plate 5, with its position corresponding to the middle of the pipe box sealing plate 5;

[0058] The tube box sealing and pressure-pressing component 7 and the tube sheet sealing and pressure-pressing component 8 are disposed within the threaded pressure-bearing ring 6.

[0059] Specifically, the tube box sealing pressure component 7 and the tube sheet sealing pressure component 8 are both located inside the threaded pressure ring 6. The pressure cap 9 is located on the inner circumference of the threaded pressure ring 6 and is connected to the threaded pressure ring 6 through a stepped structure. The pressure-bearing components adopt a split structure, which can avoid problems such as the pressure cap 9 being too large and heavy, which is not conducive to installation and positioning.

[0060] In this embodiment, it also includes:

[0061] Tube sheet tube-side gasket 13, the tube sheet tube-side gasket 13 is disposed between the inner sleeve 2 and the tube bundle tube sheet 15.

[0062] Specifically, the tube sheet side gasket 13 is located between the inner sleeve 2 and the tube bundle tube sheet 15 to improve the sealing effect at this point and ensure the sealing between the load transfer assembly and the tube bundle tube sheet 15.

[0063] In this embodiment, it also includes:

[0064] The pipe box sealing disc bracket 10 is disposed in the middle of the pipe box sealing disc 5, and the outer periphery of the pipe box sealing disc bracket 10 is in limiting contact with the inner periphery of the distribution ring 11.

[0065] Specifically, the pipe box sealing plate bracket 10 forms a limit on the distribution ring 11 on the inner circumference of the distribution ring 11, which facilitates the installation and positioning of the distribution ring 11 and improves the stability of the distribution ring 11 during operation.

[0066] In this embodiment, the tube box sealing disc 5 is provided with a thinning portion along its circumference, and the thinning portion is disposed between the tube sheet sealing top pressure component 8 and the distribution ring 11.

[0067] Specifically, the thinning section facilitates the force transmission between the corresponding parts of the tube box sealing pressure component 7 and the tube sheet sealing pressure component 8, optimizing the force transmission effect. The thinning section is more easily deformed, which can reduce load loss.

[0068] In this embodiment, the disc-shaped pressure ring 12 protrudes toward the distribution ring 11.

[0069] Specifically, the distribution ring 11, the disc-shaped pressure ring 12, and the tube sheet sealing pressure assembly 8 are sequentially assembled and connected to operate together. Among them, the tube sheet sealing pressure assembly 8 is responsible for applying and adjusting the load, the distribution ring 11 is responsible for load transmission, and the disc-shaped pressure ring 12, in addition to transmitting the load, can absorb and regulate the expansion fluctuation load when there are temperature and pressure fluctuations during operation, so as to ensure the effective application and transmission of the sealing load of the sealing transmission assembly, ensure the sealing of the tube sheet, and reduce the risk of leakage in the shell side.

[0070] Example 2

[0071] like Figure 3 and Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that:

[0072] In this embodiment, the pressure-bearing component includes:

[0073] A threaded pressure-bearing ring 6 is threadedly connected to the cylinder 1;

[0074] The pressure cap 9 is located inside the threaded pressure ring 6 and is connected to the pipe box sealing plate 5, with its position corresponding to the middle of the pipe box sealing plate 5;

[0075] The tube box sealing and pressure-pressing component 7 and the tube sheet sealing and pressure-pressing component 8 are respectively disposed in the threaded pressure-bearing ring 6 and the pressure cap 9.

[0076] Specifically, the tube sheet sealing pressure assembly 8 in the load transfer assembly can be located on the threaded pressure ring 6 or on the gland 9; correspondingly, the threaded pressure ring 6 and the gland 9 have two structural forms, and the determination of the structural dimensions is closely related to the tube sheet sealing pressure assembly 8.

[0077] Furthermore, the distribution ring 11 and the disc-shaped pressure ring 12 can be integral ring parts, or they can be composed of two or more segmented elements to form a ring part; the disc-shaped pressure ring 12 has an overall disc-shaped ring structure, and its structural dimensions can be calculated and determined according to requirements.

[0078] In summary, when implementing the sealing structure in the heat exchanger tube box provided by this invention, the required clamping forces under various operating conditions are calculated based on the tube box sealing gasket 4, the tube sheet tube-side gasket 13, and the tube sheet shell-side gasket 14. The loads F1 and F2 of the tightening bolt 71 are also calculated. Bolt load F1 primarily provides clamping force to the tube box sealing gasket 4, preventing external leakage from the tube box and ensuring sealing reliability. F2 provides clamping force to the tube sheet shell-side gasket 14, preventing internal leakage and ensuring isolation between the tube-side and shell-side media. This invention effectively ensures the effective application and transmission of the load F2. The design of the distribution ring 11 and the disc-shaped pressure ring 12 enables the uniform and effective application and transmission of the clamping force F2 required for sealing the tube sheet shell-side gasket 14 to the sealing surface, ensuring the reliability of the seal between the tube-side and shell-side and effectively preventing internal leakage. The structural design of the two key components, the distribution ring 11 and the disc-shaped pressure ring 12, takes into account both the effective transmission of load and the impact of the entire pipe box operation. In particular, the structural design of the disc-shaped pressure ring 12 is crucial for effectively ensuring a seal.

[0079] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A heat exchanger tube box, characterized in that, include: A cylindrical body (1) having an inwardly extending first extension and a second extension formed at one end of the cylindrical body (1); Tube bundle sheet (15) is disposed inside the cylinder (1), and a tube sheet shell side gasket (14) is disposed between the first extension and the tube bundle sheet (15). Pipe box sealing plate (5), the pipe box sealing plate (5) is disposed inside the cylinder (1), and a pipe box sealing gasket (4) is disposed between the second extension and the pipe box sealing plate (5); A load application component is disposed inside the cylinder (1) and outside the tube box sealing disc (5), and is used to apply a clamping force to the tube box sealing disc (5) and the tube bundle tube sheet (15) through the tube box sealing top pressure component (7) and the tube sheet sealing top pressure component (8); The load transfer assembly includes a distribution ring (11), a disc-shaped pressure ring (12), an inner sleeve end ring (3), and an inner sleeve (2) arranged sequentially between the tube box sealing disc (5) and the tube bundle plate (15).

2. The heat exchanger tube box according to claim 1, characterized in that, The load application component includes: The pressure-bearing component is threadedly connected to the cylinder (1), and the tube box sealing pressure component (7) and the tube sheet sealing pressure component (8) are movably disposed within the pressure-bearing component.

3. The heat exchanger tube box according to claim 2, characterized in that, The pipe box sealing pressure component (7) penetrates the pressure-bearing component and is positioned corresponding to the pipe box sealing gasket (4). The pipe box sealing pressure component (7) includes a tightening bolt, a pressure rod, and a pressure ring arranged in sequence.

4. The heat exchanger tube box according to claim 2, characterized in that, The tube sheet sealing top pressure component (8) penetrates the pressure bearing component and is positioned corresponding to the distribution ring (11). The tube sheet sealing top pressure component (8) includes a top tightening bolt, a pressure rod, and a pressure ring arranged in sequence.

5. The heat exchanger tube box according to claim 2, characterized in that, The pressure-bearing component includes: A threaded pressure ring (6) is threadedly connected to the cylinder (1); A pressure cap (9) is disposed inside the threaded pressure ring (6) and connected to the pipe box sealing disc (5), with its position corresponding to the middle of the pipe box sealing disc (5); The tube box sealing and pressure-pressing component (7) and the tube sheet sealing and pressure-pressing component (8) are disposed inside the threaded pressure-bearing ring (6).

6. The heat exchanger tube box according to claim 2, characterized in that, The pressure-bearing component includes: A threaded pressure ring (6) is threadedly connected to the cylinder (1); A pressure cap (9) is disposed inside the threaded pressure ring (6) and connected to the pipe box sealing disc (5), with its position corresponding to the middle of the pipe box sealing disc (5); The tube box sealing and pressure-pressing component (7) and the tube sheet sealing and pressure-pressing component (8) are respectively disposed in the threaded pressure-bearing ring (6) and the pressure cap (9).

7. The heat exchanger tube box according to claim 1, characterized in that, Also includes: Tube sheet tube-side gasket (13), the tube sheet tube-side gasket (13) is disposed between the inner sleeve (2) and the tube bundle tube sheet (15).

8. The heat exchanger tube box according to claim 1, characterized in that, Also includes: Pipe box sealing disc bracket (10) is located in the middle of the pipe box sealing disc (5), and the outer periphery of the pipe box sealing disc bracket (10) is in limiting contact with the inner periphery of the distribution ring (11).

9. The heat exchanger tube box according to claim 1, characterized in that, The tube box sealing disc (5) is provided with a thinning part along its circumference, and the thinning part is provided between the tube sheet sealing top pressure component (8) and the distribution ring (11).

10. The heat exchanger tube box according to claim 1, characterized in that, The disc-shaped pressure ring (12) protrudes toward the distribution ring (11).

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