Winding pipe type heat exchanger

Abstract

A winding pipe type heat exchanger comprises a shell pass cylinder, a winding pipe, a winding pipe, a winding pipe and a winding pipe, and pipe plates are arranged at the ends of the shell pass cylinder; the central cylinder is arranged in the shell pass cylinder along the axial direction; the heat exchange tubes are axially arranged in the shell pass cylinder and spirally wound on the periphery of the central cylinder from inside to outside to form a multi-layer spiral tube, each layer of spiral tube is provided with a straight tube section, a cone section and a spiral section, the tube diameter of the spiral section is larger than that of the straight tube section, the straight tube section, the cone section and the spiral section are sequentially arranged in the axial direction, and the end of the straight tube section is supported on the tube plate; the spiral tube heat exchanger further comprises a limiting plate located in the shell pass barrel, the side edge of the limiting plate is opposite to the inner circumferential face of the shell pass barrel in a spaced mode, and meanwhile the limiting plate is provided with a plurality of through holes penetrating through the plate thickness so that straight tube sections of all layers of spiral tubes can be inserted into the through holes. Compared with the prior art, vibration of the heat exchange tube during use can be avoided, and heat exchange is basically not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a wound tube heat exchanger. Background Art

[0002] As a new type of high-efficiency heat exchanger, the wound tube heat exchanger has the characteristics of compact structure, high heat transfer coefficient, good thermal compensation and basically no heat transfer dead zone. It is widely used in low-temperature methanol washing, air separation, oil refining and other fields.

[0003] Existing wound-tube heat exchangers typically include a shell and a core structure within the shell. The core structure is often composed of a central tube, tube sheets located at both ends of the central tube, and heat exchange tubes wrapped around the outer circumference of the central tube, with both ends of the heat exchange tube supported on the corresponding tube sheets. Specific structures are disclosed in Chinese utility model patents with patent number 202321864005.X and authorization publication number CN220418165U, "A core structure of a wound-tube heat exchanger," and Chinese utility model patents with patent number 202310019979.6 and authorization publication number CN116329410A, "A method for manufacturing a core of a wound-tube heat exchanger." During use, the shell-side medium within the shell-side cylinder exchanges heat with the tube-side medium within the heat exchange tubes.

[0004] However, during heat exchange, the flow of the heat exchange medium causes the heat exchange tubes to vibrate and generate noise. And when the overall size of the heat exchanger increases, the noise will also increase, affecting the service life of the heat exchanger. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a vibration-proof wound tube heat exchanger in view of the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a wound tube heat exchanger, comprising:

[0007] The shell side cylinder has tube sheets at its ends;

[0008] A central cylinder axially arranged inside the shell-side cylinder;

[0009] Multiple heat exchange tubes are axially arranged in the shell-side cylinder and spirally wound around the outer circumference of the central cylinder from the inside out to form multiple layers of spiral tubes. Each layer of spiral tubes has a straight tube section, a tapered section, and a spiral section with a larger diameter than the straight tube section, which are arranged in sequence along the axial direction. The ends of the straight tube sections are supported on the tube sheet.

[0010] It is characterized by also including:

[0011] The limiting plate is located in the shell side cylinder, and the side of the limiting plate is spaced apart from the inner circumference of the shell side cylinder. At the same time, the limiting plate is provided with a plurality of through holes that penetrate the plate thickness for the straight pipe sections of each layer of spiral pipe to be inserted therein.

[0012] The arrangement of the limiting plate in the utility model can prevent the heat exchange tube from vibrating during use. At the same time, since the limiting plate is arranged corresponding to the straight tube section of the heat exchange tube, heat exchange is basically not affected.

[0013] Preferably, the limit plate is arranged in the shell-side cylinder relatively close to the conical section of the spiral tube and relatively far away from the tube sheet. The limit plate arranged close to the conical section can improve the shock absorption effect of the heat exchange tube.

[0014] Furthermore, the end of the central tube is supported on the tube plate, and the limiting plate is provided with a central hole for the central tube to pass through and is annular, thereby improving the stability of the overall structure.

[0015] Preferably, the limiting plate is parallel to the tube plate.

[0016] Preferably, the heat exchanger further includes an axially extending connecting rod, with its ends respectively connected to the stop plate and the tube sheet, thereby securing the stop plate relative to the tube sheet. Of course, the connecting rod can be omitted; the through-holes in the stop plate and the heat exchange tubes can also be used to constrain the stop plate and the heat exchange tubes. Of course, the provision of the connecting rod in the present invention can further enhance structural stability and prevent displacement of the stop plate. The connecting rod in the present invention can be connected to the stop plate and the tube sheet by welding.

[0017] Furthermore, the connecting rod is located outside the outermost spiral tube.

[0018] Furthermore, there are at least two connecting rods, which are arranged at intervals along the circumferential direction on the periphery of the outermost spiral tube.

[0019] Preferably, the side contour shape of the limiting plate is consistent with the side contour shape of the tube sheet, and the side of the limiting plate is aligned with the side of the tube sheet in the axial direction.

[0020] In each of the above schemes, preferably, a sleeve for the corresponding heat exchange tube to pass through is inserted into the through hole of the limiting plate, and both ends of the sleeve protrude from the two end surfaces of the limiting plate.

[0021] Compared with the prior art, the advantages of the present invention are that the setting of the limit plate in the present invention can prevent the vibration of the heat exchange tube during use. At the same time, since the limit plate is set corresponding to the straight pipe section of the heat exchange tube, it can basically not affect the heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the partial structure of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0024] Figure 3 for Figure 1 Another enlarged view of part A in the middle. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 3 FIG. 1 is a preferred embodiment of a wound tube heat exchanger of the present invention, wherein the wound tube heat exchanger comprises a shell-side cylinder 1 , a center cylinder 2 , heat exchange tubes 3 , a limiting plate 4 and a connecting rod 5 .

[0027] The shell-side cylinder 1 is arranged vertically, and a circular tube sheet 11 is provided at the end.

[0028] The central tube 2 is axially arranged in the shell-side cylinder 1 , and the end of the central tube 2 is supported on the tube sheet 11 .

[0029] Multiple heat exchange tubes 3 are axially arranged within the shell-side cylinder 1 and spirally wound around the outer circumference of the central cylinder 2 from the inside out to form multiple layers of spiral tubes 30. Each layer of spiral tubes 30 comprises a straight tube section 31, a tapered section 32, and a spiral section 33 having a larger diameter than the straight tube section 31, arranged in sequence along the axial direction. The ends of the straight tube sections 31 are supported on the tube sheet 11. The heat exchange tubes in the straight tube sections 31 are straight tubes extending axially, while the heat exchange tubes in the spiral sections 33 are spirally wound.

[0030] The aforementioned stopper plate 4 is circular and located within the shell-side cylinder 1. It is annular and has a central hole 41 through which the center tube 2 passes. The stopper plate 4 is parallel to the tube sheet 11, with its sides aligned axially with the sides of the tube sheet 11 and spaced apart from the inner circumference of the shell-side cylinder 1. The stopper plate 4 is also provided with multiple through-holes 40 extending through the plate thickness for insertion of the heat exchange tubes of the straight sections 31 of each layer of spiral tubes 30. For details, see [Note: The following appears to be unrelated text and should likely be omitted.] Figure 2 In order to better constrain the heat exchange tube, a sleeve 6 can also be inserted into the through hole 40 of the limit plate 4 in this embodiment. The two ends of the sleeve 6 protrude from both sides of the limit plate 4, and the sleeve 6 is axially through for the corresponding heat exchange tube 3 to pass through. Figure 3 .

[0031] Meanwhile, in this embodiment, the limiting plate 4 is relatively close to the cone section 32 of the spiral tube 30 and relatively far away from the tube plate 11 .

[0032] The connecting rod 5 extends axially, with its ends connected to the stop plate 4 and the tube sheet 11, respectively, to secure the stop plate 4 relative to the tube sheet 11. The connecting rod 5 is positioned around the outermost spiral tube 30. There may be one, two, or more connecting rods 5. When there are two or more connecting rods 5, each connecting rod 5 is circumferentially spaced apart around the outermost spiral tube 30.

[0033] During heat exchange, the limit plate 4 in this embodiment can constrain the straight section of the heat exchange tube to avoid vibration of the heat exchange tube during use. At the same time, since the limit plate is set corresponding to the straight section of the heat exchange tube, it can basically not affect the heat exchange.

Claims

1. A wound tube heat exchanger comprising: A shell-side cylinder (1) is provided with a tube sheet (11) at its end; A central cylinder (2) axially arranged inside the shell-side cylinder (1); A plurality of heat exchange tubes (3) are axially arranged in the shell-side cylinder (1) and spirally wound from the inside out around the outer periphery of the central cylinder (2) to form multiple layers of spiral tubes (30). Each layer of spiral tubes (30) comprises a straight tube section (31), a conical section (32), and a spiral section (33) having a larger diameter than the straight tube section (31) arranged in sequence along the axial direction. The ends of the straight tube sections (31) are supported on the tube sheet (11). It is characterized by Also included are: A limiting plate (4) is located inside the shell-side cylinder (1), with the side of the limiting plate (4) spaced apart from the inner circumference of the shell-side cylinder (1). At the same time, the limiting plate (4) is provided with a plurality of through holes (40) penetrating the plate thickness for the straight pipe sections (31) of each layer of the spiral tube (30) to be inserted therein.

2. The wound tube heat exchanger according to claim 1, characterized in that: The limiting plate (4) is arranged in the shell-side cylinder (1) so as to be relatively close to the cone section (32) of the spiral tube (30) and relatively far away from the tube sheet (11).

3. The wound tube heat exchanger according to claim 2, characterized in that: The end of the central tube (2) is supported on the tube plate (11), and the limiting plate (4) is provided with a central hole (41) for the central tube (2) to pass through and is annular.

4. The wound tube heat exchanger according to claim 1, characterized in that: The limiting plate (4) is parallel to the tube plate (11).

5. The wound tube heat exchanger according to claim 4, characterized in that: It also includes an axially extending connecting rod (5), the two ends of which are respectively connected to the limiting plate (4) and the tube plate (11), so that the limiting plate (4) is fixed relative to the tube plate (11).

6. The wound tube heat exchanger according to claim 5, characterized in that: The connecting rod (5) is located on the periphery of the outermost spiral tube (30).

7. The wound tube heat exchanger according to claim 6, characterized in that: There are at least two connecting rods (5), which are arranged at intervals along the circumferential direction on the periphery of the outermost spiral tube (30).

8. The wound tube heat exchanger according to claim 4, characterized in that: The side profile shape of the limiting plate (4) is consistent with the side profile shape of the tube plate (11), and the side of the limiting plate (4) is aligned with the side of the tube plate (11) in the axial direction.

9. The wound tube heat exchanger according to any one of claims 1 to 8, characterized in that: A sleeve (6) for the corresponding heat exchange tube (3) to pass through is inserted into the through hole (40) of the limiting plate (4), and both ends of the sleeve (6) protrude from the two end surfaces of the limiting plate (4).

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