Center cylinder structure of spiral plate heat exchanger and core body assembly

Abstract

The utility model discloses a central cylinder structure of a spiral-plate heat exchanger and a core body assembly. The central cylinder structure comprises a cylinder body, the partition plate is arranged in the barrel body and provided with a first side edge and a second side edge which are opposite and extend in the axial direction of the barrel body, the first side edge and the second side edge are connected with the inner circumferential faces of the corresponding barrel body respectively so as to divide the inner space of the barrel body into two independent spaces, through holes are formed in the circumferential walls, corresponding to the independent spaces, of the barrel body, and the through holes are communicated with the first side edge and the second side edge. The inner port of each spiral channel at the periphery of the cylinder body can be communicated with the corresponding independent space through the respective through hole; the partition plate is in an arc shape which gradually arches towards the center of the barrel from the first side edge and the second side edge to the centers of the two side edges. Compared with an existing flat-plate-shaped partition plate, the arc-shaped partition plate is good in stress, cold fluid and hot fluid in the barrel can be separated through the partition plate with the small thickness, and therefore the space, occupied by the partition plate, in the barrel can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a central tube structure and a core assembly of a spiral plate heat exchanger. Background Technique

[0002] The existing spiral plate heat exchanger, such as the Chinese utility model patent "A Multi-stream Spiral Plate Heat Exchanger" with the patent number 202121863007.8 and the authorization announcement number CN215984131U, includes a shell, a central tube, a partition, a spiral plate, and a fluid inlet nozzle. The partition is arranged inside the central tube, and the internal space of the central tube is circumferentially divided into N independent spaces, where N is an even number greater than 3; the spiral plate is arranged inside the shell and outside the central tube, and there are N spiral plates which are wound clockwise or counterclockwise in the circumferential direction to form N pairwise adjacent spiral channels for the heat exchange medium to flow along, and the inner ports of the N spiral channels correspond to and communicate with the N independent spaces one by one; the fluid inlet nozzles are arranged on the shell, and the number of them is N - 1, and the first fluid inlet nozzle is simultaneously connected to the first and second independent spaces, and the two spiral channels corresponding to the first and second independent spaces are arranged at intervals.

[0003] Another example is the Chinese utility model patent "A Core for a Spiral Plate Heat Exchanger and a Spiral Plate Heat Exchanger" with the patent number 202121888610.1 and the authorization announcement number CN215984091U, which includes a partition and at least two spiral plates. Each end of the partition opposite to the first end of each spiral plate has a first surface and a second surface which are distributed and extended in sequence along the winding direction of the respective spiral plate, the second surface is recessed inward relative to the first surface, and the first surface and the second surface are connected by a step surface; the inner side plate surfaces of the first ends of the spiral plates are attached to their respective corresponding second surfaces, the inner end surfaces of the first ends of the spiral plates are opposite to their respective corresponding step surfaces, and the two are welded together.

[0004] The existing partitions arranged inside the central tube are mostly thick flat plate structures, which occupy a large space inside the central tube, so it is necessary to increase the size of the central tube, which in turn leads to a relatively large size of the entire heat exchanger. Summary of the Utility Model

[0005] The first technical problem to be solved by the present utility model is to provide a central tube structure of a spiral plate heat exchanger according to the current situation of the prior art, so as to reduce the space occupied by the partition itself inside the tube.

[0006] The second technical problem to be solved by the present utility model is to provide a core assembly with the above central tube structure.

[0007] The technical solution adopted by the present utility model to solve the above first technical problem is: A central tube structure of a spiral plate heat exchanger, comprising:

[0008] Cylinder;

[0009] A partition is arranged in the cylinder, and has a first side and a second side opposite to each other and extending along the axial direction of the cylinder, wherein the first side and the second side are respectively engaged with the inner circumferential surface of the corresponding cylinder to separate the internal space of the cylinder into two independent spaces, and through holes are arranged on the peripheral wall of the cylinder corresponding to each independent space, so that the inner ports of each spiral channel located on the outer periphery of the cylinder can be connected with the corresponding independent space through the respective through holes;

[0010] Features:

[0011] The partition is in an arc shape which gradually rises toward the center of the cylinder from the first and second side edges to the center of the two.

[0012] Compared with the existing flat-plate partitions, the arc-shaped partitions in the utility model have better stress resistance. Under the same stress conditions, the cold and hot fluids in the cylinder can be separated by a thinner partition, thereby reducing the space in the cylinder occupied by the partition itself.

[0013] Preferably, there are at least two partitions, which are arranged at intervals along the circumferential direction to divide the internal space of the cylinder into at least three independent spaces. Of course, there may be only one partition.

[0014] More preferably, the partitions are arranged at equal intervals along the circumferential direction.

[0015] Furthermore, the central angle corresponding to the arc is less than 180°, and more preferably, the central angle corresponding to the arc is 160°.

[0016] The technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a core body component, including a spiral plate, at least two of which are rolled from inside to outside in a clockwise or counterclockwise direction along the circumferential direction to form at least two adjacent spiral channels, characterized in that it also includes the central tube structure as described above, and the inner ports of each spiral channel are connected to the corresponding independent space through their respective through holes.

[0017] In the prior art, there is often a flow dead zone in the first circle channel between the cylinder and the spiral. To solve this technical problem, preferably, the inner port of the first spiral channel in two adjacent spiral channels is recorded as the fluid inlet;

[0018] The independent space corresponding to the first spiral channel has an inlet pipe for a portion of the first heat exchange medium to be input therein;

[0019] It further includes a feed pipeline, whose input end is used for inputting another part of the first heat exchange medium, and whose output end is axially inserted into the inner port of the first spiral channel or a position adjacent to the inner port, so as to supply another part of the first heat exchange medium to enter the first spiral channel.

[0020] During use, part of the first heat exchange medium directly enters the inner port of the first spiral channel through the feed pipeline and is mixed with the first heat exchange medium entering from the through holes of the corresponding independent space, avoiding flow dead zones.

[0021] To enable the first heat exchange medium to be evenly distributed in the first spiral channel, further, a plurality of discharge holes are provided at intervals along the length of the part of the feed pipeline located in the first spiral channel.

[0022] To enable the two parts of the first heat exchange medium to be more evenly mixed, further, there are a plurality of the above-mentioned through holes on the independent space corresponding to the first spiral channel, and they are distributed at intervals along the axis.

[0023] Further, a tongue piece extending along the winding direction of the spiral plate is convexly provided on the outer peripheral surface of the cylinder body for the inner end of the corresponding spiral plate to be connected thereto;

[0024] The cross-section of the part of the feed pipeline located in the first spiral channel is in a semi-circular structure arched towards the winding direction of the spiral plate, and both ends of the semi-circular structure are respectively joined to the corresponding tongue piece and the outer peripheral surface of the cylinder body, and the above-mentioned discharge holes are provided at the center of the semi-circular structure.

[0025] Thus, a cavity is formed between the semi-circular structure of the feed pipeline, the tongue piece and the outer peripheral surface of the cylinder body. The cross-sectional area of the cavity is relatively large, which can accommodate more first heat exchange medium, and the first heat exchange medium in the cavity enters the first spiral channel through the discharge holes.

[0026] At the same time, the feed pipeline with a semi-circular structure has better stress resistance and can better withstand the deformation caused by external forces.

[0027] And both ends of the semi-circular structure contribute to the welding between the tongue piece and the cylinder body, thereby realizing the joining.

[0028] Furthermore, a plurality of notches are provided at intervals along the length at the edge position where the feed pipeline is joined to the tongue piece and / or the outer peripheral surface of the cylinder body to connect the feed pipeline with the first spiral channel.

[0029] In this way, heat exchange medium also flows out at the joining position, avoiding flow dead zones.

[0030] Compared with the prior art, the advantages of the present utility model are as follows: Compared with the existing flat partition plates, the arc-shaped partition plate in the present utility model has better stress. Under the same stress conditions, the separation of hot and cold fluids in the cylinder can be achieved by a partition plate with a thinner thickness, thereby reducing the space occupied by the partition plate itself in the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the front view of the core component of the first embodiment of the present utility model;

[0032] Figure 2 is Figure 1 the top view of;

[0033] Figure 3 is Figure 2 the enlarged structural schematic diagram of part A in;

[0034] Figure 4 is Figure 3 the structural schematic diagram of the feed pipeline in in the B direction;

[0035] Figure 5 is the partial structural schematic diagram of the side wall of the cylinder of the first embodiment in the present utility model;

[0036] Figure 6 is the top view of the core component of the second embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present utility model will be further described in detail below with reference to the embodiments of the drawings.

[0038] Embodiment 1:

[0039] As Figures 1 to 5 shown, it is a preferred Embodiment 1 of the central cylinder structure and the core component of a spiral plate heat exchanger of the present utility model. The central cylinder structure includes a cylinder 1 and a partition plate 2.

[0040] There are two partition plates 2, which are arranged equidistantly along the circumference inside the cylinder body 1 and extend along the axial direction of the cylinder body 1. Each partition plate 2 has opposite first side edges 21 and second side edges 22 that extend along the axial direction of the cylinder body 1, and each partition plate 2 is in an arc shape that gradually arches towards the center of the cylinder body 1 from the first and second side edges to the center between them, and the central angle corresponding to the arc is less than 180° (specifically 160°). The first side edges 21 and second side edges 22 of the two partition plates 2 are respectively joined to the inner circumferential surface of the corresponding cylinder body 1 to divide the internal space of the cylinder body 1 into three independent spaces 10, namely the first independent space 101, the second independent space 102 located inside the corresponding partition plates 2, and the third independent space 103 located outside the two partition plates. At the same time, four groups of through holes 100 are provided on the peripheral wall of the cylinder body 1, where two groups of through holes 100 are respectively arranged corresponding to the first and second independent spaces, and the other two groups of through holes 100 are simultaneously arranged corresponding to the third independent space 103 and are oppositely arranged on both sides of the peripheral wall of the cylinder body 1. At the same time, the number of through holes 100 in each group of through holes 100 is multiple and they are arranged at intervals along the axial direction, and each through hole 100 is oblong. For details, please refer to Figure 5 .

[0041] The above-mentioned core component has a spiral plate 3, a feed pipeline 4, and the above-mentioned central cylinder structure. Among them, there are four spiral plates 3, which are wound into four spiral channels 30 adjacent to each other in a clockwise or counterclockwise direction along the circumference from the inside to the outside. The inner ports of each spiral channel 30 are connected to the corresponding independent space 10 through their respective through holes 100. Denote the spiral channels corresponding to the first and second independent spaces among the four spiral channels as the first spiral channels, and the two spiral channels corresponding to the third independent space 103 as the second spiral channels. The outer port of the second spiral channel is the fluid inlet end for the second heat exchange medium to enter, and the inner port is the fluid outlet end. The inner port of the first spiral channel is the fluid inlet for the first heat exchange medium to enter, and the outer port is the fluid outlet; the first and second independent spaces corresponding to the first spiral channel have inlet nozzles for part of the first heat exchange medium to be input therein. The input end of the above-mentioned feed pipeline 4 is used for the other part of the first heat exchange medium to be input, and the output end is axially inserted into the inner port of the first spiral channel or a position adjacent to the inner port to supply the other part of the first heat exchange medium to enter the first spiral channel. And multiple discharge holes 40 are provided at intervals along the length direction of the part of the feed pipeline 4 located in the first spiral channel.

[0042] In this embodiment, as Figure 3As shown in the figure, on the outer peripheral surface of the cylinder body 1, there are convex tongues 11 extending along the winding direction of the spiral plate 3 for the inner end portions of the corresponding spiral plates 3 to be connected thereto; the cross-section of the part of the feed pipeline 4 located in the first spiral channel is in a semi-circular structure arched towards the winding direction of the spiral plate 3, and both ends of the semi-circular structure are respectively joined to the corresponding tongue 11 and the outer peripheral surface of the cylinder body 1, and a discharge hole 40 as described above is provided at the center of the semi-circular structure. In this way, a cavity 400 is enclosed between the semi-circular structure of the feed pipeline 4, the tongue 11, and the outer peripheral surface of the cylinder body 1. The cross-sectional area of the cavity 400 is relatively large and can accommodate more first heat exchange medium, and the first heat exchange medium in the cavity 400 enters the first spiral channel through the discharge hole 40, which helps to avoid flow dead zones. At the same time, the feed pipeline 4 with a semi-circular structure has better force-bearing capacity and can better withstand external forces to avoid deformation caused by such external forces. And both ends of the semi-circular structure are helpful for welding with the tongue 11 and the cylinder body 1, so as to achieve joining.

[0043] At the same time, as Figure 4 shown, at the edge positions where the feed pipeline 4 is joined to the tongue 11 and the outer peripheral surface of the cylinder body 1, a plurality of notches 41 are provided at intervals along the length direction to connect the feed pipeline 4 with the first spiral channel, thereby further avoiding flow dead zones.

[0044] In this embodiment, the same heat exchange medium flows through the first independent space 101 and the second independent space 102, and the flow direction of the heat exchange medium is shown in the arrow direction in Figure 1 the figure.

[0045] In addition, two different heat exchange media can also flow through the first independent space 101 and the second independent space 102, which is specifically designed according to design requirements.

[0046] Embodiment Two:

[0047] As Figure 6 shown, this is a preferred Embodiment Two of the central cylinder structure and the core assembly of a spiral plate heat exchanger of the present utility model. This embodiment is basically the same as Embodiment One, the difference being that in this embodiment, there is only one partition plate 2, and the inner space of the cylinder body 1 is divided into two independent spaces 10. Correspondingly, there are two spiral plates 3 in this embodiment, and they are wound into two adjacent spiral channels 30 from the inside to the outside in the clockwise or counterclockwise direction along the circumference, and the inner ports of each spiral channel 30 are connected to the corresponding independent space 10 through their respective through holes 100.

Claims

1. A central tube structure of a spiral plate heat exchanger, comprising: Cylinder (1); A partition (2) is arranged in the cylinder (1), and has a first side edge (21) and a second side edge (22) which are opposite to each other and extend along the axial direction of the cylinder (1), wherein the first side edge (21) and the second side edge (22) are respectively engaged with the inner peripheral surface of the corresponding cylinder (1) to separate the internal space of the cylinder (1) into two independent spaces (10), and a through hole (100) is provided on the peripheral wall of the cylinder (1) corresponding to each independent space (10), so that the inner port of each spiral channel located on the outer periphery of the cylinder (1) can be connected with the corresponding independent space (10) through the respective through hole (100); Features: The partition (2) is in the shape of an arc that gradually rises from the first and second side edges to the center of the two sides toward the center of the cylinder (1).

2. The central cylinder structure according to claim 1, wherein: There are at least two partitions (2) which are arranged at intervals along the circumferential direction to divide the internal space of the cylinder (1) into at least three independent spaces (10).

3. The central cylinder structure according to claim 2, characterized in that: The partitions (2) are arranged at equal intervals in the circumferential direction.

4. The central cylinder structure according to claim 1, characterized in that: The central angle corresponding to the arc is less than 180°.

5. A core component, comprising a spiral plate (3), wherein there are at least two spiral plates (3) which are wound into at least two adjacent spiral channels (30) from the inside to the outside in the clockwise or counterclockwise direction along the circumference, and is characterized in that It also includes a central tube structure as claimed in any one of claims 1 to 4, wherein the inner port of each spiral channel (30) is connected to the corresponding independent space (10) through its own through hole (100).

6. The core component according to claim 5, wherein: The inner port of the first spiral channel of the two adjacent spiral channels (30) is referred to as the fluid inlet; The independent space (10) corresponding to the first spiral channel has an inlet pipe for a portion of the first heat exchange medium to be input therein; It also includes a feed pipeline (4), whose input end is used to input another part of the first heat exchange medium, and whose output end is axially inserted at the inner port of the first spiral channel or a position adjacent to the inner port to allow another part of the first heat exchange medium to enter the first spiral channel.

7. The core component according to claim 6, characterized in that: The portion of the feed pipeline (4) located in the first spiral channel is provided with a plurality of discharge holes (40) spaced apart along the length direction.

8. The core component according to claim 7, wherein: There are a plurality of through holes (100) on the independent space (10) corresponding to the first spiral channel, and the through holes (100) are spaced apart and distributed along the axial direction.

9. The core component according to claim 7, wherein: A tongue piece (11) is convexly provided on the outer peripheral surface of the cylinder (1) and extends along the rolling direction of the spiral plate (3), so that the inner end of the corresponding spiral plate (3) can be connected thereto; The cross section of the portion of the feed pipeline (4) located in the first spiral channel is a semicircular structure that is arched toward the rolling direction of the spiral plate (3), and the two ends of the semicircular structure are respectively connected to the corresponding tongue piece (11) and the outer peripheral surface of the cylinder (1), and the above-mentioned discharge hole (40) is provided in the center of the semicircular structure.

10. The core component according to claim 9, characterized in that: The edge of the feed pipeline (4) that is joined to the tongue (11) and / or the outer peripheral surface of the barrel (1) is provided with a plurality of notches (41) at intervals along the length direction to connect the feed pipeline (4) with the first spiral channel.

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