High-efficiency double-tube-plate heat exchanger

Abstract

The utility model relates to the field of double tube plate heat exchanger, specifically discloses a kind of efficient double tube plate heat exchanger, comprising: shell;First tube plate, quantity is two, respectively install in the both ends of shell;Second tube plate, quantity is two, is set to the both sides of two first tube plate;Heat exchange tube, simultaneously through two first tube plate;Splicing pipe, install on second tube plate, and one end of splicing pipe is installed in heat exchange tube.In the utility model, when single heat exchange tube or splicing pipe leaks, the sealing connection of the pipe on two tube plates does not need to be damaged and repaired simultaneously, and only the corresponding heat exchange tube needs to be disassembled to complete the pipe plugging or pipe replacement operation, avoiding the inconvenience of complex operation in narrow gap cavity.

Description

Technical Field

[0001] This utility model belongs to the technical field of dual tube sheet heat exchangers, and specifically relates to a high-efficiency dual tube sheet heat exchanger. Background Technology

[0002] A double tubesheet heat exchanger is a specially designed shell-and-tube heat exchanger. Its core feature is the use of two independent tubesheets on the tube side, replacing the single tubesheet structure found in single tubesheet heat exchangers. This is primarily to prevent cross-contamination between the tube-side and shell-side media.

[0003] A search revealed a double tube sheet heat exchanger in publication number CN119412974A, comprising a base frame and a shell fixed on the base frame. Two tube sheets are disposed inside the shell, and a plurality of heat exchange tubes are disposed between the two tube sheets. The shell is provided with a tube-side fluid inlet, a tube-side fluid outlet, a shell-side fluid inlet, and a shell-side fluid outlet. A multifunctional sliding vane is disposed inside the shell between the two tube sheets, and a sliding vane driving device is disposed outside the shell. A first sealing device is disposed between the shell and the tube sheets, and a second sealing device is disposed between the tube sheets and the heat exchange tubes.

[0004] Existing dual tube sheet heat exchangers are inconvenient to repair and maintain. When a single heat exchange tube leaks, it is necessary to simultaneously break and repair the sealing connection of the tube on both tube sheets before tube plugging or replacement can be performed. This is very inconvenient to operate in the narrow gap cavity and may affect the sealing of adjacent tubes. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency dual tube sheet heat exchanger to solve the problems mentioned in the background art, such as the inconvenience of repairing and maintaining dual tube sheet heat exchangers. When a single heat exchange tube leaks, it is necessary to simultaneously destroy and repair the sealing connection of the tube on the two tube sheets before the tube plugging or replacement operation can be performed. This is very inconvenient to operate in the narrow gap cavity and may affect the sealing of adjacent tubes.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-efficiency double tube sheet heat exchanger includes: a shell;

[0008] The first tube sheet, of which there are two, is installed at both ends of the shell;

[0009] There are two second tube sheets, which are set on both sides of the two first tube sheets;

[0010] The heat exchange tubes penetrate both first tube sheets simultaneously.

[0011] The splicing pipe is installed on the second tube sheet, with one end of the splicing pipe installed inside the heat exchange tube.

[0012] Preferably, a limiting head is installed on the splicing pipe, and the limiting head contacts one end of the heat exchange tube. The limiting head is used to limit the size of the splicing pipe inserted into the heat exchange tube.

[0013] Preferably, the limiting head is annular and is sleeved on the splicing pipe.

[0014] Preferably, two limiting members are installed on the heat exchange tube, and the two limiting members are respectively connected to two first tube sheets. The limiting members are used to fix the heat exchange tube to the two first tube sheets.

[0015] Preferably, the limiting component is a nut, and the heat exchange tube is provided with external threads, and the nut is connected to the heat exchange tube through the external threads.

[0016] Preferably, the limiting element is a limiting ring, and the heat exchange tube is fixed to the first tube sheet by the limiting ring.

[0017] Preferably, a sealing ring is installed on the outer ring of the splicing pipe, and the sealing ring is in contact with the inner wall of the heat exchange pipe.

[0018] Preferably, the second tube sheet includes:

[0019] A connecting sleeve is installed on one side of the second tube sheet, and the second tube sheet is connected to the first tube sheet through the connecting sleeve.

[0020] Preferably, the second tube sheet further includes:

[0021] An inner ring plate is installed on one side of the second tube sheet, and a connecting sleeve is fitted onto the inner ring plate. The connecting sleeve is connected to the first tube sheet by threads.

[0022] Preferably, a connector is installed at the end of the second tube sheet away from the connecting sleeve.

[0023] This invention provides a high-efficiency dual-tube sheet heat exchanger. Compared with the prior art, it has the following advantages: through the plug-in structure of the heat exchange tubes and splicing pipes, when a single heat exchange tube or splicing pipe leaks, it is not necessary to simultaneously damage and repair the sealing connection of the tube on the two tube sheets. Only the corresponding heat exchange tube needs to be disassembled to complete the tube plugging or replacement operation, avoiding the inconvenience of performing complex operations in narrow gap cavities.

[0024] This reduces the impact of maintenance on the seals of adjacent tubes. The maintenance process does not require damage to the overall sealing structure of the two tube sheets, which improves maintenance efficiency, reduces maintenance costs, and makes the disassembly and replacement of heat exchange tubes and splicing pipes more convenient, thus shortening maintenance time. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2This is a schematic diagram of the cross-section of the second tube sheet and the end cap proposed in this utility model.

[0027] Figure 3 This is an enlarged cross-sectional view of the first tube sheet and the second tube sheet proposed in this utility model.

[0028] Figure 4 This is a partial enlarged cross-sectional view of the first tube sheet and heat exchange tube proposed in this utility model.

[0029] Figure 5 This is a partial enlarged cross-sectional view of the heat exchange tube, splicing pipe, and limiting component proposed in this utility model.

[0030] The reference numerals in the figure are as follows: 100, shell; 101, first tube sheet; 200, second tube sheet; 201, connector; 202, connecting sleeve; 203, inner ring plate; 300, heat exchange tube; 301, splicing pipe; 302, limiting head; 303, limiting element. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1: Refer to Figures 1-5 A high-efficiency double tube sheet heat exchanger, comprising:

[0033] The shell 100, serving as the main frame of the heat exchanger, provides installation space and structural support for all internal components. It also forms a closed shell-side space, allowing the shell-side medium to flow around the heat exchange tubes 300 within the shell 100, providing a basic environment for heat exchange. The closed structure ensures directional flow of the shell-side medium, preventing leakage, while also supporting the first tube sheet 101 and the heat exchange tubes 300, ensuring the stability of the overall structure and reducing component loosening caused by external vibration or medium impact.

[0034] Two first tube sheets 101 are installed at both ends of the shell 100. The first tube sheet 101 serves as a direct support structure for the heat exchange tubes 300, fixing both ends of the heat exchange tubes 300 and separating the shell-side space from the outer area of ​​the tube sheet. This prevents the shell-side medium and the tube-side medium from mixing prematurely in the non-heat exchange area. By fixing both ends, the position of the heat exchange tubes 300 within the shell 100 is ensured to be stable, preventing the heat exchange tubes 300 from shaking or shifting due to the impact of medium flow. At the same time, its separating function provides constraint on the flow path of the shell-side medium, improving heat exchange efficiency.

[0035] The second tube sheet 200, of which there are two, is disposed on both sides of the two first tube sheets 101, forming a "double tube sheet" structure with the first tube sheets 101. It is the core component of the double tube sheet heat exchanger to prevent cross-contamination. The second tube sheet 200 cooperates with the splicing pipe 301 to form a secondary isolation area for the tube-side medium (the first tube sheet 101 isolates the shell side and the intermediate area, and the second tube sheet 200 isolates the intermediate area and the external tube side). Even if a small leak occurs in the heat exchange tube 300 or the splicing pipe 301, the medium will first accumulate in the gap between the first tube sheet 101 and the second tube sheet 200, rather than directly mixing into the shell side or the external system. The leak can be detected in time by detecting the medium in the gap, which greatly reduces the risk of cross-contamination between the tube-side and shell-side media.

[0036] The heat exchange tube 300 passes through both first tube sheets 101. The heat exchange tube 300 serves as the core carrier for heat exchange. The tube-side medium (such as high-temperature steam) flows inside the tube, while the shell-side medium flows outside the tube. Heat transfer between the two media is achieved through the tube wall.

[0037] The splicing pipe 301 is installed on the second tube sheet 200, with one end of the splicing pipe 301 installed inside the heat exchange tube 300. The splicing pipe 301 enables segmented flow of the tube-side medium. The tube-side medium first enters the splicing pipe 301 through an external pipe, and then enters the heat exchange tube 300 through the plug-in structure between the splicing pipe 301 and the heat exchange tube 300. When a single heat exchange tube 300 or the splicing pipe 301 leaks, it is not necessary to damage the overall seal of the two tube sheets. The splicing pipe 301 or the heat exchange tube 300 can be replaced by disassembling the individual tubes, which reduces the difficulty of maintenance and the impact on adjacent components.

[0038] A limiting head 302 is installed on the splicing pipe 301. The limiting head 302 contacts one end of the heat exchange tube 300. The limiting head 302 is used to limit the size of the splicing pipe 301 inserted into the heat exchange tube 300 and to limit the depth of the splicing pipe 301 inserted into the heat exchange tube 300. This ensures that the insertion size of all splicing pipes 301 and heat exchange tubes 300 is consistent, avoiding excessive compression between the splicing pipe 301 and the inner wall of the heat exchange tube 300 due to excessive insertion (which may cause tube wall deformation), or insufficient contact area due to shallow insertion (which affects sealing and heat exchange efficiency). This ensures the stability and consistency of the insertion structure.

[0039] The limiting head 302 is ring-shaped and is sleeved on the splicing pipe 301.

[0040] Two limiting members 303 are installed on the heat exchange tube 300. The two limiting members 303 are respectively connected to the two first tube sheets 101. The limiting members 303 are used to fix the heat exchange tube 300 on the two first tube sheets 101. The limiting members 303 firmly fix the heat exchange tube 300 on the first tube sheet 101, preventing the heat exchange tube 300 from being displaced due to the impact of the shell-side medium or its own thermal expansion and contraction, and enhancing the connection stability between the heat exchange tube 300 and the first tube sheet 101.

[0041] The limiting component 303 is a nut. The heat exchange tube 300 is provided with external threads. The nut is connected to the heat exchange tube 300 through the external threads. The detachable threaded connection method facilitates the installation, disassembly and replacement of the heat exchange tube 300. When the heat exchange tube 300 leaks or is damaged, the heat exchange tube 300 can be removed simply by unscrewing the nut. There is no need to damage the overall structure of the first tube sheet 101, which greatly simplifies the maintenance process and reduces maintenance costs.

[0042] A sealing ring is installed on the outer ring of the splicing pipe 301. The sealing ring contacts the inner wall of the heat exchange tube 300. The sealing ring enhances the sealing performance at the splicing pipe 301 and the heat exchange tube 300 joint, preventing the tube-side medium from leaking from the gap to the gap between the first tube sheet 101 and the second tube sheet 200. By making close contact with the inner wall of the heat exchange tube 300, it fills the joint gap, reduces the risk of leakage, and ensures the effective flow of the tube-side medium and the heat exchange efficiency.

[0043] The second tube sheet 200 includes:

[0044] The connecting sleeve 202 is installed on one side of the second tube sheet 200, and the second tube sheet 200 is connected to the first tube sheet 101 through the connecting sleeve 202.

[0045] The second tube sheet 200 also includes:

[0046] The inner ring plate 203 is installed on one side of the second tube sheet 200. The connecting sleeve 202 is sleeved on the inner ring plate 203. The connecting sleeve 202 is threadedly connected to the first tube sheet 101. The second tube sheet 200 is fixed to the outside of the first tube sheet 101 through the connecting sleeve 202, realizing the detachable connection between the second tube sheet 200 and the first tube sheet 101. At the same time, it supports the position of the second tube sheet 200. While installing the second tube sheet 200, the connecting sleeve 202 can tightly connect the splicing pipe 301 and the heat exchange tube 300.

[0047] A connector 201 is installed at the end of the second tube sheet 200 away from the connecting sleeve 202.

[0048] Example 2: The difference between this example and Example 1 is that the limiting member 303 is a limiting ring. The heat exchange tube 300 is fixed on the first tube sheet 101 by the limiting ring. The limiting ring can be fixed by welding or snap-fitting. It has a simple structure, low cost, and can provide a continuous and stable constraint force for the heat exchange tube 300. It is suitable for cost-sensitive or long-term operating conditions.

[0049] During operation, the tube-side medium enters the system through the connector 201 on the second tube sheet 200 and flows into the splicing pipe 301 through the internal channel of the second tube sheet 200; the shell-side medium enters the interior of the shell 100 through the corresponding interface on the shell 100, forming a flow space around the heat exchange tube 300. The tube-side medium flows in from the splicing pipe 301 and enters the interior of the heat exchange tube 300 through the insertion structure between the splicing pipe 301 and the heat exchange tube 300. The sealing ring on the outer ring of the splicing pipe 301 is in close contact with the inner wall of the heat exchange tube 300 to ensure that the tube-side medium does not leak from the gaps; the annular limiting head 302 ensures that the splicing pipe 301 is inserted into the heat exchange tube 300 in the same size, maintaining a stable flow path.

[0050] The tube-side medium flows inside the heat exchange tubes 300, while the shell-side medium flows in the space between the shell 100 and the heat exchange tubes 300. The two media transfer heat through the tube walls of the heat exchange tubes 300. The first tube sheet 101 separates the shell-side space from the external area, constraining the flow path of the shell-side medium and improving heat exchange efficiency. The second tube sheet 200 forms a double isolation with the first tube sheet 101 to prevent cross-contamination of the media.

[0051] The tube-side medium that has completed heat exchange flows out from the other end of the heat exchange tube 300 and is discharged from the system through the splicing pipe 301, the second tube sheet 200 and the connector 201 on the other side; the shell-side medium flows out through the outlet of the shell 100, realizing the recycling or subsequent treatment of the medium.

[0052] If a single heat exchange tube 300 or splice tube 301 leaks, it can be repaired individually. By rotating the connecting sleeve 202, the threaded connection between the connecting sleeve 202 and the first tube sheet 101 can be removed from the second tube sheet 200, and the splice tube 301 can be taken out from the heat exchange tube 300. Then, the nut on the heat exchange tube 300 that needs to be replaced can be unscrewed, and the heat exchange tube 300 can be taken out from the first tube sheet 101 for replacement without damaging the overall structure of the tube sheet.

[0053] The entire workflow, through its segmented structural design and dual sealing and fixing mechanisms, ensures efficient heat exchange and pollution prevention while enabling convenient maintenance operations, thereby improving the equipment's operational stability and service life.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency double tube sheet heat exchanger, characterized in that, include: Casing (100); The first tube sheet (101) consists of two tube sheets, which are installed at both ends of the housing (100); There are two second tube sheets (200), which are arranged on both sides of the two first tube sheets (101); The heat exchange tube (300) passes through both first tube sheets (101); The splicing pipe (301) is installed on the second tube sheet (200), with one end of the splicing pipe (301) installed inside the heat exchange tube (300).

2. The high-efficiency double tube sheet heat exchanger according to claim 1, characterized in that, A limiting head (302) is installed on the splicing pipe (301). The limiting head (302) contacts one end of the heat exchange tube (300). The limiting head (302) is used to limit the size of the splicing pipe (301) inserted into the heat exchange tube (300).

3. The high-efficiency double tube sheet heat exchanger according to claim 2, characterized in that, The limiting head (302) is ring-shaped and is sleeved on the splicing pipe (301).

4. The high-efficiency double tube sheet heat exchanger according to claim 1, characterized in that, Two limiting members (303) are installed on the heat exchange tube (300). The two limiting members (303) are respectively connected to the two first tube sheets (101). The limiting members (303) are used to fix the heat exchange tube (300) on the two first tube sheets (101).

5. The high-efficiency double tube sheet heat exchanger according to claim 4, characterized in that, The limiting component (303) is a nut, and the heat exchange tube (300) is provided with external threads. The nut is connected to the heat exchange tube (300) through the external threads.

6. The high-efficiency double tube sheet heat exchanger according to claim 4, characterized in that, The limiting member (303) is a limiting ring, and the heat exchange tube (300) is fixed on the first tube sheet (101) by the limiting ring.

7. The high-efficiency double tube sheet heat exchanger according to claim 1, characterized in that, The outer ring of the splicing pipe (301) is equipped with a sealing ring, which is in contact with the inner wall of the heat exchange tube (300).

8. The high-efficiency double tube sheet heat exchanger according to claim 1, characterized in that, The second tube sheet (200) includes: A connecting sleeve (202) is installed on one side of the second tube sheet (200), and the second tube sheet (200) is connected to the first tube sheet (101) through the connecting sleeve (202).

9. The high-efficiency double tube sheet heat exchanger according to claim 8, characterized in that, The second tube sheet (200) also includes: The inner ring plate (203) is installed on one side of the second tube plate (200), and the connecting sleeve (202) is sleeved on the inner ring plate (203). The connecting sleeve (202) is connected to the first tube plate (101) by threads.

10. The high-efficiency double tube sheet heat exchanger according to claim 9, characterized in that, A connector (201) is installed at the end of the second tube sheet (200) away from the connecting sleeve (202).

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