A shell-and-tube heat exchanger easy to disassemble

Abstract

An easily disassembled shell-and-tube heat exchanger comprises a support and a heat exchange system arranged on the support, both ends of the heat exchange system are respectively provided with a fluid inlet and outlet system and a reversing system, wherein the heat exchange system comprises a heat exchange cylinder, the fluid inlet and outlet system and the reversing system both comprise a sealing cover, the outer circle of both ends of the heat exchange cylinder and the outer circle of the sealing side of the sealing cover are both provided with a connecting flange, and a plurality of connecting ports are arranged on the connecting flange in a circumferential direction; the connecting flange on the heat exchange cylinder is a first flange, the inner side of the first flange is provided with a plurality of adjusting platforms corresponding to the connecting ports one by one, the adjusting platform comprises a pressing plate arranged in a gap with the first flange, and a supporting plate arranged between the pressing plate and the first flange, and a through hole is arranged in the middle of the pressing plate corresponding to the connecting port; the connecting port on the first flange is arranged through the outer circle of the first flange; further comprising a connecting piece penetrating through the connecting port and the through hole and pulling the inner side of the connecting flange of the sealing cover, and the adjusting platform is arranged to make the alignment and connection work between the sealing cover and the heat exchange cylinder more convenient.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to an easily disassembled shell-and-tube heat exchanger. Background Technology

[0002] A shell-and-tube heat exchanger is a type of indirect heat exchanger that uses the wall of a heat exchange tube bundle enclosed in a heat exchange cylinder as the heat transfer surface. It typically includes a heat exchange cylinder with tube boxes at both ends. The heat exchange cylinder contains a heat exchange tube bundle, and one tube box has a baffle plate that separates a first chamber and a second chamber inside the tube box. The first chamber and the second chamber are respectively connected to a cold fluid inlet and a cold fluid outlet. The heat exchange cylinder has a hot fluid inlet and a hot fluid outlet. The cold fluid can enter the first chamber from the cold fluid inlet, then flow through the heat exchange tube bundle corresponding to the first chamber to the opposite tube box, and then flow through the heat exchange tube bundle corresponding to the second chamber from the opposite tube box to the second chamber, and finally flow out from the cold fluid outlet. When the hot fluid flows through the heat exchange cylinder, it can complete the heat exchange with the tube wall of the heat exchange tube bundle.

[0003] The tube box and heat exchanger are usually connected by connecting flanges. That is, a bolt assembly is used to pass through the connecting flanges on the tube box and the heat exchanger to connect and fix the tube box and the heat exchanger. However, this connection method requires the bolt holes on the two connecting flanges to be aligned in order to tighten the bolts. However, it is difficult to observe and judge the alignment of the bolt holes manually, which makes the connection between the tube box and the heat exchanger still have limitations. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides an easily disassembled shell-and-tube heat exchanger.

[0005] The technical solution of this utility model is as follows: A shell-and-tube heat exchanger that is easy to disassemble includes a support and a heat exchange system mounted on it. The two ends of the heat exchange system are respectively provided with a fluid inlet / outlet system for cold fluid to enter and exit, and a reversing system for reversing the direction of the cold fluid. The cold fluid can flow from the fluid inlet / outlet system to the reversing system, and then flow back from the reversing system to the fluid inlet / outlet system for discharge. When the hot fluid flows through the heat exchange system, it can complete heat exchange with the cold fluid flowing through it.

[0006] As the core technical concept of this utility model, the heat exchange system includes a heat exchange cylinder, and the fluid inlet / outlet system and the reversing system both include a sealing cover. The outer rings at both ends of the heat exchange cylinder and the outer ring of the sealing side of the sealing cover are provided with outwardly extending connecting flanges. The connecting flanges are provided with a plurality of connection ports around their circumference. The connecting flange on the heat exchange cylinder is a first flange, and its inner side is provided with a plurality of adjusting platforms corresponding one-to-one with the connection ports. The adjusting platform includes a pressure plate that is spaced apart from the first flange and a support plate provided between the pressure plate and the first flange. The pressure plate has a through hole in the middle corresponding to the connection port. The connection port on the first flange passes through the outer ring of the first flange. The heat exchanger also includes a connecting piece that passes through the connection port and the through hole and tightens the inner side of the connecting flange on the sealing cover.

[0007] Based on the above structure, when connecting the sealing cover and the heat exchange cylinder, since the connection port on the first flange passes through the outer ring of the first flange, the alignment of the connecting flange on the sealing cover and the connection port on the first flange can be easily observed manually. This allows the connecting parts to pass through the connection port on the sealing cover and the first flange more easily. Furthermore, due to the gap between the pressure plate and the first flange, the connecting parts can pass through the through hole more easily, thus completing the connection between the sealing cover and the heat exchange cylinder. At the same time, this connection method can prevent the first flange from being directly subjected to the connection force of the connecting parts, prevent the structure of the connection port on the first flange from being damaged, and ensure the stability of the connection.

[0008] As described above, in a preferred embodiment of the easily disassembled shell-and-tube heat exchanger, to ensure a more stable and reliable connection between the sealing cover and the heat exchange cylinder under the action of the regulating platform and to prevent damage to the regulating platform structure, two support plates are provided on both sides of the connection port. At the same time, the two support plates can better abut against both sides of the connection port on the first flange, further ensuring the sealing performance of the connection between the sealing cover and the heat exchange cylinder.

[0009] As a further preferred embodiment, in order to ensure the structural strength of the regulating platform, and thus the connection strength between the heat exchange cylinder and the sealing cover under the action of the regulating platform, the pressure plate is welded and fixed to the heat exchange cylinder, and the support plate is welded and fixed to the first flange, the heat exchange cylinder, and the pressure plate.

[0010] As described above, an easily disassembled shell-and-tube heat exchanger includes a threaded rod in terms of the structure of the connecting member. One end of the threaded rod is tightened to the inside of the connecting flange on the sealing cover by a pull rod, and the other end passes through the connecting port and the through hole in sequence, and is provided with a nut.

[0011] In a preferred embodiment, to ensure that the connection ports of the connecting flange on the sealing cover can be tightened by the pull rod, the threaded rod is perpendicular to the pull rod and fixed to the middle of the pull rod.

[0012] As a further preferred embodiment, to ensure the connection strength between the threaded rod and the tie rod, the threaded rod and the tie rod are welded and fixed together.

[0013] As described above, for an easily disassembled shell-and-tube heat exchanger, in order to further ensure the connection strength and sealing performance between the sealing cover and the heat exchange cylinder, the circumferential array of the connection ports has at least eight ports.

[0014] The beneficial effects of this utility model are as follows: This utility model is an easy-to-disassemble shell-and-tube heat exchanger. When connecting the sealing cover and the heat exchange cylinder, since the connection port on the first flange passes through the outer ring of the first flange, the alignment of the connecting flange on the sealing cover and the connection port on the first flange can be easily observed manually. This allows the connecting piece to pass through the connection port on the sealing cover and the first flange more easily. Furthermore, due to the gap between the pressure plate and the first flange, the connecting piece can pass through the through hole more easily, thus completing the connection between the sealing cover and the heat exchange cylinder. At the same time, this connection method can prevent the first flange from being directly subjected to the connection force of the connecting piece, prevent the structure of the connection port on the first flange from being damaged, and ensure the stability of the connection. Attached Figure Description

[0015] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the heat exchanger in the embodiment; Figure 2 This is a schematic diagram of the internal structure of the heat exchanger in the embodiment; Figure 3 This is a schematic diagram of the adjustment table in the embodiment; Figure 4 This is a schematic diagram of the connection structure between the sealing cover and the heat exchange cylinder in the embodiment; The components represented by the various reference numerals in the diagram are: 1. Heat exchange system; 11. Heat exchange cylinder; 12. First flange; 13. Adjustment platform; 131. Support plate; 132. Pressure plate; 14. Hot fluid inlet; 15. Hot fluid outlet; 16. Heat exchange tube assembly; 2. Support; 3. Fluid inlet / outlet system; 31. First sealing cover; 32. Baffle plate; 33. Cold fluid inlet; 34. Cold fluid outlet; 4. Reversing system; 41. Second sealing cover; 5. Connecting parts; 51. Threaded rod; 52. Tie rod; 53. Nut. Detailed Implementation

[0017] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0018] Example This embodiment provides an easily disassembled shell-and-tube heat exchanger; see [link to documentation]. Figure 1 The heat exchanger includes a support 2 and a heat exchange system 1 mounted on it. The two ends of the heat exchange system 1 are respectively provided with a fluid inlet / outlet system 3 for cold fluid to enter and exit, and a reversing system 4 for cold fluid to change direction. The cold fluid can flow from the fluid inlet / outlet system 3 to the reversing system 4, and then flow back from the reversing system 4 to the fluid inlet / outlet system 3 for discharge. When the hot fluid flows through the heat exchange system 1, it can complete the heat exchange with the cold fluid flowing through it. The structure of the heat exchanger (the above-mentioned easy-to-disassemble shell and tube heat exchanger) will be described in detail below with reference to the accompanying drawings.

[0019] In this embodiment, combined with Figure 2 The heat exchange system 1 includes a heat exchange cylinder 11 and a heat exchange tube assembly 16 inside it. The heat exchange cylinder 11 is a cylindrical structure that is arranged horizontally and has two through ends. The heat exchange tube assembly 16 includes tube sheets at both ends inside the heat exchange cylinder 11 and a plurality of heat exchange tubes that pass through the two tube sheets at both ends. A hot fluid inlet 14 and a hot fluid outlet 15 are respectively provided on the upper side of one end and the lower side of the other end of the heat exchange cylinder 11, and the hot fluid inlet 14 and the hot fluid outlet 15 are both connected to the inner cavity of the heat exchange cylinder 11 between the two tube sheets.

[0020] Furthermore, both the fluid inlet / outlet system 3 and the reversing system 4 include sealing covers. The outer rings at both ends of the heat exchange cylinder 11 and the outer rings on the sealing side of the sealing cover are provided with outwardly extending connecting flanges, and the two ends of the heat exchange cylinder 11 are sealed and connected to the two sealing covers through the cooperation of the connecting flanges.

[0021] The sealing cover of the fluid inlet / outlet system 3 is a first sealing cover 31, which has a horizontal partition 32 inside. One side of the vertical partition 32 is sealed and pressed against the tube sheet next to it, and the interior of the first sealing cover 31 is divided into a first chamber and a second chamber that are not connected vertically. A cold fluid inlet 33 and a cold fluid outlet 34 are respectively provided for the first chamber and the second chamber. The sealing cover of the reversing system 4 is a second sealing cover 41. Based on the above structure, the cold fluid can enter the first chamber from the cold fluid inlet 33, and then flow to the second sealing cover 41 through a part of the heat exchange tube corresponding to the first chamber. Then, the cold fluid is guided back to the second chamber through a part of the heat exchange tube corresponding to the second chamber, and then discharged from the cold fluid outlet 34. The hot fluid can enter the heat exchange tube 11 from the hot fluid inlet 14 at one end of the heat exchange tube 11, and then be discharged from the hot fluid outlet 15 at the other end of the heat exchange tube 11, and complete the heat exchange with the heat exchange tube in the heat exchange tube 11.

[0022] In a preferred embodiment, the heat exchange tube assembly 16 further includes baffles located inside the heat exchange cylinder 11 between the two tube sheets and arranged in an alternating pattern. These baffles are configured to change the flow direction of the hot fluid and ensure the heat exchange effect between the hot fluid and the heat exchange tubes.

[0023] In this embodiment, combined with Figure 3 and Figure 4 As the core technical concept of this utility model, the connecting flange is provided with several connection ports around its circumference. The connecting flange on the heat exchange cylinder 11 is the first flange 12. The inner side of the first flange 12 (near the middle of the heat exchange cylinder 11) is provided with several adjusting platforms 13 corresponding to the connection ports. The adjusting platform 13 includes a pressure plate 132 that is spaced apart from the first flange 12 and connected to the outer wall of the heat exchange cylinder 11, and a support plate 131 that is provided between the pressure plate 132 and the first flange 12. The pressure plate 132 has a through hole in the middle corresponding to the connection port. The connection port on the first flange 12 passes through the outer ring of the first flange 12. The heat exchanger also includes a connecting piece 5 that passes through the connection port and the through hole and tightens the inner side of the connecting flange on the sealing cover.

[0024] Based on the above structure, when connecting the sealing cover and the heat exchange cylinder 11, since the connection port on the first flange 12 passes through the outer ring of the first flange 12, the alignment of the connecting flange on the sealing cover and the connection port on the first flange 12 can be easily observed manually. This allows the connecting piece 5 to pass through the connection port on the connecting flange on the sealing cover and the first flange 12 more easily. Furthermore, due to the gap between the pressure plate 132 and the first flange 12, the connecting piece 5 can pass through the through hole more easily, thus completing the connection between the sealing cover and the heat exchange cylinder 11. At the same time, this connection method can prevent the first flange 12 from being directly subjected to the connection force of the connecting piece 5, prevent the structure of the connection port on the first flange 12 from being damaged, and ensure the stability of the connection.

[0025] As a preferred embodiment, in order to ensure that the connection between the sealing cover and the heat exchange cylinder 11 can be more stable and reliable under the action of the regulating platform 13 and to prevent damage to the structure of the regulating platform 13, two support plates 131 are provided on both sides of the connection port. At the same time, the two support plates 131 can better abut against both sides of the connection port on the first flange 12, further ensuring the sealing performance of the connection between the sealing cover and the heat exchange cylinder 11.

[0026] As a further preferred embodiment, in order to ensure the structural strength of the regulating platform 13, and thus the connection strength between the heat exchange cylinder 11 and the sealing cover under the action of the regulating platform 13, the pressure plate 132 is welded and fixed to the outer wall of the heat exchange cylinder 11, and the support plate 131 is welded and fixed to the first flange 12, the heat exchange cylinder 11, and the pressure plate 132. That is, three sides of the support plate 131 are welded and fixed to the inner side of the first flange 12, the outer wall of the heat exchange cylinder 11, and the side of the pressure plate 132 near the first flange 12, respectively.

[0027] Preferably, to further ensure the connection strength and sealing performance between the sealing cover and the heat exchange cylinder 11, the circumferential array of the connection ports has at least eight ports.

[0028] In this embodiment, the connector 5 includes a threaded rod 51. One end of the threaded rod 51 is tightened to the inner side of the connecting flange on the sealing cover by a pull rod 52, and the other end passes through the connection port and the through hole in sequence, and is provided with a nut 53.

[0029] In a preferred embodiment, to ensure that the connection ports of the connecting flange on the sealing cover can be tightened by the pull rod 52, the threaded rod 51 is perpendicular to the pull rod 52 and fixed to the middle of the pull rod 52.

[0030] As a further preferred option, to ensure the connection strength between the threaded rod 51 and the tie rod 52, the threaded rod 51 and the tie rod 52 are welded and fixed.

Claims

1. A shell-and-tube heat exchanger that is easy to disassemble and assemble, comprising a support (2) and a heat exchange system (1) disposed thereon, wherein the two ends of the heat exchange system (1) are respectively provided with a fluid inlet / outlet system (3) for supplying cold fluid and a reversing system (4) for reversing the direction of the cold fluid, characterized in that: The heat exchange system (1) includes a heat exchange cylinder (11), and the fluid inlet / outlet system (3) and the reversing system (4) both include a sealing cover. The outer rings at both ends of the heat exchange cylinder (11) and the outer rings on the sealing side of the sealing cover are provided with outwardly extending connecting flanges. The connecting flanges are provided with several connecting ports around their circumference. The connecting flange on the heat exchange cylinder (11) is the first flange (12), and its inner side is provided with a number of adjusting platforms (13) corresponding to the connecting ports. The adjusting platform (13) includes a pressure plate (132) that is spaced apart from the first flange (12), and a support plate (131) that is provided between the pressure plate (132) and the first flange (12). The pressure plate (132) has a through hole in the middle corresponding to the connecting port. The connection port on the first flange (12) extends through the outer ring of the first flange (12); It also includes a connector that passes through the connection port and through hole and tightens the inside of the connecting flange on the sealing cover.

2. The shell-and-tube heat exchanger for easy disassembly and assembly according to claim 1, characterized in that, The support plate (131) is provided with two pieces in the gap on both sides of the connection port.

3. A shell-and-tube heat exchanger for easy disassembly and assembly according to claim 2, characterized in that, The pressure plate (132) is welded and fixed to the heat exchange cylinder (11), and the support plate (131) is welded and fixed to the first flange (12), the heat exchange cylinder (11), and the pressure plate (132).

4. The easily disassembled shell-and-tube heat exchanger according to claim 1, characterized in that, The connector includes a threaded rod (51), one end of which is tightened to the inside of the connecting flange on the sealing cover by a pull rod (52), and the other end passes through the connection port and the through hole in sequence, and is provided with a nut (53).

5. A shell-and-tube heat exchanger for easy disassembly and assembly according to claim 4, characterized in that, The threaded rod (51) is perpendicular to the pull rod (52) and fixed to the middle of the pull rod (52).

6. A shell-and-tube heat exchanger for easy disassembly and assembly according to claim 5, characterized in that, The threaded rod (51) is welded and fixed to the tie rod (52).

7. A shell-and-tube heat exchanger that is easy to disassemble and assemble according to any one of claims 1-6, characterized in that, The circumferential array of the connection ports has at least eight ports.

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