Supporting structure for heat exchange tube and winding tube type heat exchanger

Abstract

A supporting structure for a heat exchange tube and a winding tube type heat exchanger, the supporting structure comprises an inner ring and an outer ring which are arranged inside and outside, the outer circumferential surface of the inner ring is opposite to the inner circumferential surface of the outer ring at an interval to form an axial through ring cavity, and the axial direction of the ring cavity is recorded as the vertical direction; the outer ring is formed by arranging a plurality of first unit strips in a circle in the circumferential direction, and the ends of every two adjacent first unit strips are opposite in a spaced mode and form a gap allowing a heat exchange pipe to penetrate through. The supporting strips extend inwards and outwards and are arranged in the annular cavity at intervals in the circumferential direction, the outer end of each supporting strip is connected with the central part of the corresponding first unit strip, the inner end of each supporting strip is connected with the corresponding inner ring, and therefore the annular cavity is divided into a plurality of independent spaces in the circumferential direction; and each independent space is provided with a corresponding gap. According to the utility model, the heat pipes can enter the supporting structure conveniently, and meanwhile, the heat exchange pipes can be stably restrained.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a support structure for heat exchange tubes and a wound tube heat exchanger. Background Technology

[0002] Existing wound tube heat exchangers, such as the structure disclosed in Chinese Utility Model Patent No. 201920654173.3, "A Wound Tube Heat Exchanger" (Authorization Announcement No. CN209945069U), include a shell-side cylinder, a core, an upper tube sheet, and an upper tube box end cap. The shell-side cylinder has a first chamber and a second chamber that are connected and distributed vertically. The inner diameter of the first chamber is larger than the inner diameter of the second chamber, and the height of the second chamber is designed according to the condensation rate of the process gas medium. The core is detachably and vertically installed in the first chamber. The upper tube sheet is located at the top of the shell-side cylinder, and the upper end of the heat exchange tube of the core is limited on the upper tube sheet. The upper tube box end cap is located on the upper part of the upper tube sheet.

[0003] For example, the Chinese utility model patent with patent number 202223107689.7, entitled "Wound Tube Heat Exchanger with Cleaning Structure" (authorization announcement number CN218846956U), includes a vertically arranged shell-side cylinder, a central cylinder vertically arranged within the shell-side cylinder, multiple heat exchange tubes, and a cleaning structure. The multiple heat exchange tubes are arranged axially within the shell-side cylinder and spirally wound around the outer periphery of the central cylinder from the inside out to form a multi-layer spiral tube. The cleaning structure includes an inner coil and an outer coil. The inner coil is sleeved around the outer periphery of the central cylinder and located inside the innermost spiral tube. The inner coil has multiple first cleaning holes on its tube wall. The outer coil is sleeved around the outermost spiral tube and located within the shell-side cylinder. The outer coil has multiple second cleaning holes on its tube wall. At the same time, the outer coil is connected to the inner coil and is connected to a pipe for the inlet of cleaning medium. The pipe extends out of the side wall of the shell-side cylinder.

[0004] During heat exchange, the shell-side medium inside the shell-side cylinder exchanges heat with the tube-side medium inside the heat exchange tubes.

[0005] However, during heat exchange, the flow of the heat exchange medium can cause the heat exchange tubes to vibrate, generating noise. Furthermore, the detachable heat exchange core structure necessitates consideration of how to improve the overall structural stability. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a support structure for heat exchange tubes in light of the current state of the technology, so that the heat exchange tubes can be stably constrained while entering the support structure.

[0007] The second technical problem to be solved by this utility model is to provide a wound tube heat exchanger with the above-mentioned support structure.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a support structure for heat exchange tubes, characterized in that it includes:

[0009] An inner ring and an outer ring are arranged one inside and one outside. The outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring are spaced apart and opposite to each other to form an axially penetrating annular cavity, and the axis of the annular cavity is defined as the up and down direction. The outer ring is formed by several first unit strips arranged in a circle along the circumference. The ends of two adjacent first unit strips are spaced apart and opposite to each other to form a gap for heat exchange tubes to pass through.

[0010] Several support bars extending inward and outward are spaced apart circumferentially within the annular cavity. The outer end of each support bar is connected to the central part of its corresponding first unit bar, and the inner end of each support bar is connected to the corresponding inner ring, thereby dividing the annular cavity circumferentially into several independent spaces, each with its own corresponding gap.

[0011] In this way, the heat exchange tubes can be divided into several strands, and each heat exchange tube passes through its corresponding gap in sequence and is constrained in an independent space, which facilitates operation.

[0012] Furthermore, the heat exchange tubes entering the independent space can be distributed on both sides of the gap and close to the corresponding support strip. At this time, the heat exchange tubes located in the independent space do not affect the subsequent heat exchange tubes from entering the independent space through the gap, and the heat exchange tubes distributed on both sides of the gap can be well constrained under the action of the corresponding support strip and the first unit strip.

[0013] Preferably, the inner ring is formed by a plurality of second unit strips arranged in a circle around the perimeter, with the ends of two adjacent second unit strips facing each other and joining together, and the central part of each second unit strip being connected to the inner end of its corresponding support strip.

[0014] Preferably, the outer end and inner end of each support bar are connected to the corresponding first unit bar and second unit bar to form an integral piece. The support structure of this utility model can be obtained by assembling several integral pieces having support bars, first unit bars, and second unit bars.

[0015] Preferably, the outer ring and / or support strip have multiple through holes spaced apart in the vertical direction. The through hole design ensures the flow area of ​​the shell-side medium, and the support structure with through holes can act as a distribution plate to ensure uniform distribution of the shell-side medium.

[0016] In the above embodiments, preferably, a rotatable roller is provided on the outer circumferential surface of the outer ring at a position avoiding the gap. The roller design facilitates the axial movement of the heat exchange tube with support structure relative to the shell-side cylinder, thereby facilitating assembly and disassembly.

[0017] Furthermore, the number of rollers matches the number of the first unit strips, and each roller is located in the central part of its corresponding first unit strip.

[0018] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a wound tube heat exchanger, comprising:

[0019] Vertically arranged shell-side cylindrical body;

[0020] A heat exchange core is disposed within a shell-side cylinder and has a vertically extending central cylinder and multiple heat exchange tubes at least partially wound around the outer periphery of the central cylinder. The heat exchange tubes have a helical section spirally wound around the outer periphery of the central cylinder and a straight tube section located below the helical section and extending vertically. The heat exchange core as a whole is arranged to be able to move upward and detach from the shell-side cylinder through the upper port of the shell-side cylinder.

[0021] The feature is that it also has the support structure as described above, wherein the inner ring is sleeved on the outer periphery of the lower end of the central cylinder and connected to the central cylinder, and the straight pipe sections of the multiple heat exchange tubes are divided into several groups and are respectively installed in their respective independent spaces;

[0022] Meanwhile, the inner wall surface of the shell-side cylinder is provided with a flange for supporting the outer ring.

[0023] The flange design allows the support structure to be stably constrained within the shell-side cylinder, thus effectively constraining the heat exchange tubes.

[0024] Preferably, the heat exchange tubes passing through each independent space are divided into two groups, and are distributed on both sides of the corresponding gap, close to the corresponding support bars. The heat exchange tubes distributed on both sides of the gap do not affect the subsequent heat exchange tubes from passing through the gap into the independent space, and the heat exchange tubes distributed on both sides of the gap can be well constrained by the corresponding support bars and the first unit bars.

[0025] Furthermore, the upper surface of the flange is provided with a telescopic component that can extend and retract vertically, and the outer ring is placed on the telescopic component. The telescopic component can be a spring, bellows, or the like that that extends vertically. The design of the telescopic component can better support the outer ring.

[0026] To facilitate the separation of the heat exchange core from the shell-side cylinder, the interior of the central cylinder is further hollow;

[0027] The heat exchange tube has two parts along its length, namely a first part and a second part connected together. The first part is wound around the outer periphery of the central cylinder and has the aforementioned spiral section and straight pipe section. The second part passes through the lower port of the central cylinder and enters the central cylinder.

[0028] Compared with the prior art, the advantages of this utility model are as follows: by designing the support structure as having an inner ring, an outer ring and a support strip, and forming several independent spaces that are independently distributed in the circumferential direction among the three, each independent space has its own corresponding gap, so that when it is necessary to constrain the heat exchange tube, the heat exchange tube can be divided into several strands, and each heat exchange tube passes through its corresponding gap in sequence and is constrained in the independent space, which is convenient for operation.

[0029] Furthermore, the heat exchange tubes entering the independent space can be distributed on both sides of the gap and close to the corresponding support strip. At this time, the heat exchange tubes located in the independent space do not affect the subsequent heat exchange tubes from entering the independent space through the gap, and the heat exchange tubes distributed on both sides of the gap can be well constrained under the action of the corresponding support strip and the first unit strip. Attached Figure Description

[0030] Figure 1 This is a longitudinal sectional view of the wound tube heat exchanger according to Embodiment 1 of this utility model;

[0031] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0032] Figure 3 This is a schematic diagram of the support structure according to Embodiment 1 of this utility model;

[0033] Figure 4 This is a schematic diagram of the integral component of the supporting structure according to Embodiment 1 of this utility model;

[0034] Figure 5 This is a schematic diagram of the support structure with constrained heat exchange tubes according to Embodiment 1 of this utility model;

[0035] Figure 6 for Figure 5 Enlarged view of section B;

[0036] Figure 7 This is a partial cross-sectional view of the flange and telescopic component in the wound tube heat exchanger of Embodiment 2 of this utility model;

[0037] Figure 8 This is a schematic diagram of the support structure with constrained heat exchange tubes in Embodiment 2 of this utility model. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Example 1:

[0040] like Figures 1-6As shown, this is a preferred embodiment of a support structure for heat exchange tubes and a wound tube heat exchanger according to the present invention. The support structure includes an inner ring 31, an outer ring 32, a support bar 33, and a roller 34.

[0041] The inner ring 31 and outer ring 32 are arranged coaxially, one inside and one outside, with the outer circumferential surface of the inner ring 31 and the inner circumferential surface of the outer ring 32 spaced apart to form an axially penetrating annular cavity. In this embodiment, the axis of the annular cavity is vertical. The outer ring 32 is formed by N arc-shaped first unit strips 320 arranged circumferentially, with the ends of two adjacent first unit strips 320 spaced apart to form a gap 321 for the heat exchange tube 2 to pass through. The inner ring 31 is formed by N arc-shaped second unit strips 310 arranged circumferentially, with the ends of two adjacent second unit strips 310 facing each other and joining together. Here, N is a natural number ≥ 2. At the same time, a rotatable roller 34 is provided on the outer circumferential surface of the outer ring 32, avoiding the position of the gap 321. The number of rollers 34 matches the number of first unit strips 320, and each roller 34 is respectively located in the central part of its corresponding first unit strip 320.

[0042] There are N support bars 33, each extending inwards and outwards and spaced circumferentially within the annular cavity. The outer end of each support bar 33 is connected to the central portion of its corresponding first unit bar 320, and the inner end of each support bar 33 is connected to the central portion of its corresponding second unit bar 310, thereby dividing the annular cavity circumferentially into N independent spaces 300, each with its own corresponding gap 321. In this embodiment, the outer and inner ends of each support bar 33 are connected to the corresponding first unit bar 320 and second unit bar 310 respectively to form an integral component, and the N integral components are combined to form the support structure of this embodiment. Furthermore, multiple through holes 330 extending vertically are distributed at intervals on both the outer ring 32 and the support bars 33.

[0043] like Figure 1 , 2 As shown, the wound tube heat exchanger of this embodiment includes a shell-side cylinder 1, a first tube sheet 4, a heat exchange core, and the aforementioned support structure.

[0044] The shell-side cylindrical body 1 is vertically arranged and includes a vertically arranged straight cylindrical body 101, an upper end cap 102 located at the upper port of the straight cylindrical body 101, and a lower end cap located at the lower port of the straight cylindrical body 101. Both the lower end cap and the upper end cap 102 are provided with shell-side connecting pipes for the shell-side medium to pass through. The upper end cap 102 is detachably connected to the straight cylindrical body 101, specifically, through a flange 5 and flange bolts 51, so that the upper end cap 102 can be detached from the straight cylindrical body 101.

[0045] There are three first tube sheets 4, one of which is located at the top of the upper head 102, and the other two are located on the side walls of the upper head 102 respectively.

[0046] The heat exchange core includes a central cylinder 3 and multiple heat exchange tubes 2. The central cylinder 3 is hollow inside and vertically disposed within the shell-side cylinder 1. The upper end of the central cylinder 3 is opposite to and connected to the first tube sheet 4 located at the top of the upper end cap 102, and the lower end of the central cylinder 3 is a free end with its opening facing downwards. Simultaneously, the lower end of the central cylinder 3 is connected to the aforementioned support structure. Specifically, an inner ring 31 is fitted around the outer periphery of the lower end of the central cylinder 3 and connected to it. The inner wall of the straight cylinder 101 is provided with a flange 104, and the upper surface of the flange 104 is provided with a spring extending vertically as a telescopic member 105. The outer ring 32 rests on the spring. (See details below.) Figure 1 Thus, when the center cylinder 3 detaches from the straight cylinder 101 along with the upper end cap 102, the roller 32 on the outer circumferential surface of the outer ring 32 can roll along the inner wall surface of the straight cylinder 101. When the center cylinder 3 is installed inside the straight cylinder 101, the flange 104 and the spring can stably support the aforementioned support structure and the center cylinder 3.

[0047] Multiple heat exchange tubes 2 are arranged inside the shell-side cylinder 1 along a first direction. Each heat exchange tube 2 has two parts along its length: a first part 2a and a second part 2b connected together. The first part 2a is wound around the outer circumference of the central cylinder 3 and has a spiral section 21 spirally wound around the outer circumference of the central cylinder 3 and a straight tube section 22 extending vertically below the spiral section 21. The straight tube sections of the multiple heat exchange tubes 2 are divided into several groups and are respectively installed in their respective independent spaces 300. The heat exchange tubes 2 installed in each independent space 300 are divided into two groups and are distributed on both sides of the corresponding gap 321, close to the corresponding support bars 33. See [link to details]. Figure 5 , 6 The lower end of the second part 2b of the central cylinder 3 is inserted into the central cylinder 3, and the upper ends of the second part 2b of the multiple heat exchange tubes 2 are all supported on the first tube sheet 4 located at the top of the upper head 102. The upper ends of the first part 2a of the multiple heat exchange tubes 2 are divided into two groups and are respectively supported on the other two first tube sheets 4 located on the side walls of the upper head 102.

[0048] When the heat exchange tubes leak and require maintenance, the upper end cap 102 can be detached from the straight cylinder 101. At this time, the central cylinder 3 connected to the upper end cap 102 and the heat exchange tubes can be detached from the straight cylinder 101 together with the upper end cap 102.

[0049] Example 2:

[0050] like Figure 7 , 8As shown, this is a preferred embodiment two of the present invention for a support structure for heat exchange tubes and a wound tube heat exchanger. This embodiment is basically the same as embodiment one, except that the telescopic member 105 in this embodiment is a corrugated pipe extending vertically. In this embodiment, as... Figure 8 As shown, the heat exchange tubes 2 installed in each independent space 300 fill the entire independent space 300, and during the winding process, each heat exchange tube 2 is arranged sequentially from the inside to the outside in the independent space 300 until it fills the entire independent space.

[0051] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0052] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

[0053] The term "radial" is also used in the specification and claims of this utility model, meaning basically along the inside and outside direction, and is not limited to the radial direction that passes through the center of the circle, but can also be slightly deviated from the radial direction.

Claims

1. A support structure for heat exchange tubes, characterized in that... Including: An inner ring (31) and an outer ring (32) are arranged in an inner and outer configuration. The outer circumferential surface of the inner ring (31) and the inner circumferential surface of the outer ring (32) are spaced apart and opposite to each other to form an axially penetrating annular cavity, and the axial direction of the annular cavity is defined as the up and down direction. The outer ring (32) is formed by a number of first unit strips (320) arranged in a circle along the circumference. The ends of two adjacent first unit strips (320) are spaced apart and opposite to each other to form a gap (321) through which the heat exchange tube (2) passes. Several support bars (33) extending inward and outward are spaced apart in the annular cavity along the circumferential direction. The outer end of each support bar (33) is connected to the central part of its corresponding first unit bar (320), and the inner end of each support bar (33) is connected to the corresponding inner ring (31), thereby dividing the annular cavity into several independent spaces (300) along the circumferential direction. Each independent space (300) has its own corresponding gap (321).

2. The support structure according to claim 1, characterized in that: The inner ring (31) is formed by a number of second unit strips (310) arranged in a circle around the perimeter. The ends of two adjacent second unit strips (310) are opposite to each other and joined together. The central part of each second unit strip (310) is connected to the inner end of its corresponding support strip (33).

3. The support structure according to claim 2, characterized in that: The outer and inner ends of each support bar (33) are connected to the corresponding first unit bar (320) and second unit bar (310) to form a whole.

4. The support structure according to claim 1, characterized in that: The outer ring (32) and / or the support strip (33) are provided with a plurality of through holes (330) that extend in the vertical direction.

5. The support structure according to any one of claims 1 to 4, characterized in that: The outer ring (32) has a rotatable roller (34) on its outer circumferential surface, away from the gap (321).

6. The support structure according to claim 5, characterized in that: The number of rollers (34) matches the number of the first unit strips (320), and each roller (34) is located in the central part of its corresponding first unit strip (320).

7. A wound tube heat exchanger, comprising: A vertically arranged shell-side cylindrical body (1); The heat exchange core is located inside the shell-side cylinder (1) and has a vertically extending central cylinder (3) and multiple heat exchange tubes (2) at least partially wound around the outer periphery of the central cylinder (3). The heat exchange tubes (2) have a spiral section (21) spirally wound around the outer periphery of the central cylinder (3) and a straight tube section (22) located below the spiral section (21) and extending vertically. The heat exchange core is arranged as a whole to be able to move upward and detach from the shell-side cylinder (1) through the upper port of the shell-side cylinder (1). Its features It also has the support structure as described in any one of claims 1 to 6, wherein the inner ring (31) is sleeved on the outer periphery of the lower end of the central cylinder (3) and connected to the central cylinder (3), and the straight pipe sections of the multiple heat exchange tubes (2) are divided into several groups and are respectively installed in their respective independent spaces (300); Meanwhile, the inner wall surface of the shell-side cylinder (1) is provided with a flange (104) for supporting the outer ring (32).

8. The wound tube heat exchanger according to claim 7, characterized in that: The heat exchange tubes (2) installed in each independent space (300) are divided into two groups and distributed on both sides of the corresponding gap (321) close to the corresponding support bar (33).

9. The wound tube heat exchanger according to claim 7, characterized in that: The upper surface of the flange (104) is provided with a telescopic member (105) that can extend and retract vertically, and the outer ring (32) is placed on the telescopic member (105).

10. The wound tube heat exchanger according to claim 7, characterized in that: The interior of the central cylinder (3) is hollow; The heat exchange tube (2) has two parts along its length, namely a first part (2a) and a second part (2b) connected to each other. The first part (2a) is wound around the outer periphery of the central tube (3) and has the aforementioned spiral section (21) and straight tube section (22). The second part (2b) passes through the lower port of the central tube (3) and is inserted into the central tube (3).

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