Tube bundle structure of shell-and-tube carbon dioxide condenser

Abstract

The utility model relates to a tube bundle structure of a shell-and-tube carbon dioxide condenser, which comprises a plurality of heat exchange tubes arranged side by side, and two ends of each heat exchange tube are connected with a tube plate through detachable tube joints; each pipe joint comprises a pipe neck used for penetrating through the pipe plate, and the pipe neck is connected with a limiting ring used for abutting against the pipe plate; mounting holes allowing the tube necks to penetrate through are formed in the tube plate, the outer walls of the tube necks are in threaded connection with the mounting holes, and all ends of the heat exchange tubes are inserted into the tube necks and are in threaded connection with the inner walls of the tube necks; inner pipe wall threads are arranged on the inner wall of each heat exchange pipe, the inner pipe wall threads are two-way crossed threads, and evenly-distributed point-shaped protrusions are formed at the intersection positions of the two-way threads. The pipe joints and the pipe plates are detachably connected, the pipe joints and the heat exchange pipes are detachably connected, the heat exchange pipes, the pipe joints and the pipe plates can be detached and replaced, and the threaded connection mode is convenient to detach and time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of condensers, in particular to a tube bundle structure of a shell and tube type carbon dioxide condenser. Background Art

[0002] Shell and tube CO2 condenser is a common type of condenser, which consists of an internal tube bundle and an outer shell. The internal tube bundle is used to flow the heat medium, while the outer shell is used to flow the cooling medium. According to the heat exchange method and structural characteristics between the internal tube bundle and the outer shell, the shell and tube condenser can be further divided into fixed tube sheet condenser, U-tube condenser, multi-tube parallel condenser, etc.

[0003] The internal tube bundle is composed of multiple heat exchange tubes arranged side by side, and both ends of the heat exchange tubes are welded and fixed to the tube sheet. The existing tube bundle structure has the following technical problems during use: when the heat exchange tube is damaged and needs to be replaced, the heat exchange tube can only be cut off, replaced with a new heat exchange tube and then re-welded. The existing connection method between the heat exchange tube and the tube sheet is very inconvenient, time-consuming and labor-intensive during replacement. At the same time, the existing heat exchange tubes are generally smooth tubes, that is, the inner and outer walls of the heat exchange tubes are smooth, and the heat exchange effect needs to be further improved.

[0004] Based on the above technical problems, the inventors have proposed a tube bundle structure of a shell and tube type carbon dioxide condenser through design and research and development. The heat exchange tubes and tube sheets of this structure adopt a detachable connection method to reduce the difficulty of replacement. At the same time, the heat exchange tube structure is also changed accordingly, thereby improving the heat exchange effect. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a tube bundle structure of a shell and tube type carbon dioxide condenser.

[0006] The utility model is realized by the following technical scheme, providing a tube bundle structure of a shell and tube type carbon dioxide condenser, comprising a plurality of heat exchange tubes arranged side by side, both ends of each heat exchange tube being connected to a tube sheet through a detachable tube joint; each tube joint comprises a tube neck for penetrating the tube sheet, and a limit ring for supporting the tube sheet is connected to the tube neck; a mounting hole for each tube neck to pass through is provided on the tube sheet, the outer wall of the tube neck is threadedly connected to the mounting hole, each end of the heat exchange tube is inserted into the tube neck and threadedly connected to the inner wall of the tube neck; an inner tube wall thread is provided on the inner wall of each heat exchange tube, the inner tube wall thread is a bidirectional cross thread, and uniformly distributed dot-shaped protrusions are formed at the intersection of the bidirectional threads.

[0007] Preferably, in order to improve the sealing effect at the connection between the pipe joint and the tube sheet, a rubber sealing ring is sleeved on the pipe neck, and the rubber sealing ring is located between the limiting ring and the tube sheet. When the pipe neck is gradually screwed into the mounting hole, the rubber sealing ring is pressed against the tube sheet through the limiting ring, thereby improving the sealing effect.

[0008] Preferably, the length of the tube neck is twice the thickness of the tube sheet, and the end of the tube neck protrudes out of the tube sheet.

[0009] Preferably, both ends of the outer wall of each heat exchange tube are provided with a one-way external thread for connecting to the inner wall of the tube neck.

[0010] Preferably, in order to increase the heat transfer area of ​​the heat exchange tube and improve the heat exchange efficiency, a plurality of heat-conducting fins are welded and fixed on the outer wall of each heat exchange tube, the plurality of heat-conducting fins are distributed along the circumference of the heat exchange tube, and each heat-conducting fin is arranged along the axial direction of the heat exchange tube.

[0011] The beneficial effects of the utility model are:

[0012] 1. The pipe joint and the tube sheet adopt a detachable connection method. The pipe joint and the heat exchange tube adopt a detachable connection method. The heat exchange tube, pipe joint and tube sheet can be disassembled and replaced, and the threaded connection method is easy to disassemble and assemble, saving time and effort.

[0013] 2. The inner wall of the heat exchange tube is provided with bidirectional cross threads, and evenly distributed dot-shaped protrusions are formed at the intersection. At the same time, with the setting of the heat-conducting fins, the heat transfer area of ​​the heat exchange tube is increased without changing the length and inner diameter of the heat exchange tube, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the connection between the heat exchange tube and the tube sheet of the utility model;

[0015] Figure 2 yes Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0016] Figure 3 This is a schematic diagram of the outer wall structure of the heat exchange tube of the utility model after the plane is unfolded;

[0017] Figure 4 This is a schematic diagram of the inner wall structure of the heat exchange tube of the utility model after the plane is unfolded;

[0018] As shown in the figure:

[0019] 1. Tube sheet, 2. Heat exchange tube, 3. Heat transfer fin, 4. Tube neck, 5. Limiting ring, 6. Rubber sealing ring, 7. Mounting hole, 8. One-way external thread, 9. Two-way cross thread. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0021] like Figure 1-4As shown, the utility model includes a plurality of heat exchange tubes 2 arranged side by side, and both ends of each heat exchange tube 2 are connected to the tube sheet 1 through a detachable pipe joint. Each pipe joint includes a tube neck 4 for penetrating the tube sheet 1, and a limit ring 5 for resisting the tube sheet 1 is connected to the tube neck 4. A mounting hole 7 for each tube neck 4 to pass through is provided on the tube sheet 1, and the outer wall of the tube neck 4 is threadedly connected to the mounting hole 7, and each end of the heat exchange tube 2 is inserted into the tube neck 4 and threadedly connected to the inner wall of the tube neck 4. An inner tube wall thread is provided on the inner wall of each heat exchange tube 2, and the inner tube wall thread is a bidirectional cross thread 9, and evenly distributed dot-shaped protrusions are formed at the intersection of the bidirectional threads.

[0022] In this embodiment, in order to improve the sealing effect of the connection between the pipe joint and the tube sheet 1, a rubber sealing ring 6 is sleeved on the tube neck 4, and the rubber sealing ring 6 is located between the limiting ring 5 and the tube sheet 1. When the tube neck 4 is gradually screwed into the mounting hole 7, the rubber sealing ring 6 is pressed against the tube sheet 1 through the limiting ring 5, thereby improving the sealing effect.

[0023] In this embodiment, the length of the tube neck 4 is twice the thickness of the tube plate 1 , and the end of the tube neck 4 protrudes out of the tube plate 1 .

[0024] In this embodiment, both ends of the outer wall of each heat exchange tube 2 are provided with one-way external threads 8 for connecting to the inner wall of the tube neck 4 .

[0025] In this embodiment, in order to increase the heat transfer area of ​​the heat exchange tube 2 and improve the heat exchange efficiency, a plurality of heat-conducting fins 3 are welded and fixed on the outer wall of each heat exchange tube 2. The plurality of heat-conducting fins 3 are distributed along the circumference of the heat exchange tube 2, and each heat-conducting fin 3 is arranged along the axial direction of the heat exchange tube 2.

[0026] The pipe joint and the tube sheet 1 are connected in a detachable manner, and the pipe joint and the heat exchange tube 2 are connected in a detachable manner. The heat exchange tube 2, the pipe joint, and the tube sheet 1 can all be disassembled and replaced, and the threaded connection method is convenient for disassembly and assembly, saving time and effort. The inner wall of the heat exchange tube 2 is provided with a bidirectional cross thread 9, and uniformly distributed dot-shaped protrusions are formed at the intersection. At the same time, in conjunction with the setting of the heat-conducting fins 3, the heat transfer area of ​​the heat exchange tube 2 is increased without changing the length and inner diameter of the heat exchange tube 2, thereby improving the heat exchange efficiency.

[0027] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. Shell and tube type carbon dioxide condenser tube bundle structure, characterized by: It comprises a plurality of heat exchange tubes arranged side by side, and both ends of each heat exchange tube are connected to the tube sheet through a detachable tube joint; each tube joint comprises a tube neck for penetrating the tube sheet, and a limit ring for supporting the tube sheet is connected to the tube neck; a mounting hole for each tube neck to pass through is provided on the tube sheet, and the outer wall of the tube neck is threadedly connected to the mounting hole, and each end of the heat exchange tube is inserted into the tube neck and threadedly connected to the inner wall of the tube neck; an inner tube wall thread is provided on the inner wall of each heat exchange tube, and the inner tube wall thread is a bidirectional cross thread, and evenly distributed dot-shaped protrusions are formed at the intersection of the bidirectional threads.

2. The tube bundle structure of the shell and tube type carbon dioxide condenser according to claim 1, characterized in that: A rubber sealing ring is sleeved on the tube neck and is located between the limiting ring and the tube plate.

3. The tube bundle structure of the shell and tube type carbon dioxide condenser according to claim 2, characterized in that: The length of the tube neck is twice the thickness of the tube sheet, and the end of the tube neck protrudes from the tube sheet.

4. The tube bundle structure of the shell and tube type carbon dioxide condenser according to claim 1, characterized in that: Both ends of the outer wall of each heat exchange tube are provided with one-way external threads for connecting to the inner wall of the tube neck.

5. The tube bundle structure of the shell and tube type carbon dioxide condenser according to claim 1, characterized in that: A plurality of heat-conducting fins are welded and fixed on the outer wall of each heat exchange tube. The plurality of heat-conducting fins are distributed along the circumference of the heat exchange tube, and each heat-conducting fin is arranged along the axial direction of the heat exchange tube.

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