Heat exchanger with novel tube plate structure

Abstract

The utility model discloses a heat exchanger with a novel tube plate structure, which belongs to the technical field of heat exchangers and comprises a guide cylinder arranged on the upper portion of an inner cavity of a shell pass cylinder, and the lower end of the guide cylinder is fixedly welded with an upper tube plate. A tube pass upper sealing head and a tube bundle are welded and fixed at the upper end of the guide cylinder; the tube bundle is arranged at the lower part of the inner cavity of the shell pass cylinder; the upper end of the tube bundle is fixedly connected to the upper tube plate; the lower tube plate is connected to the inner side of the lower flange through a fastener; a first upper flange is welded and fixed at the lower end of the shell side upper sealing head; a second upper flange is welded at the upper end of the shell pass cylinder, and the first upper flange and the second upper flange are connected through a bolt; the tube pass upper sealing head is arranged in the shell pass upper sealing head; the device can be conveniently detached and cleaned; when the height of the shell pass cylinder is fixed and the heat exchange requirement is met, the length of the tube bundle is reduced, the material cost is reduced, and the machining and manufacturing difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger with a novel tube sheet structure. Background Art

[0002] Heat exchangers can achieve heating, cooling, evaporation, condensation and other heat exchange effects, and are widely used in medicine, chemical, electric power, food and other industries. The most common ones are ordinary shell and tube heat exchangers and wound tube heat exchangers. Compared with shell and tube, wound tube heat exchanger has better heat exchange effect, smaller volume under the same heat exchange area, and has significant advantages in heat exchange effect compared with ordinary shell and tube.

[0003] Traditional wound-tube heat exchangers are generally composed of tube sheets, tube bundles, shells, shell-side heads, tube-side heads, etc. The tube sheets are welded to the tube-side heads and shell-side heads respectively and cannot be disassembled, making it impossible to clean the inside of the equipment.

[0004] CN207268582U discloses a detachable coiled tube heat exchanger. The tube bundle can be pulled out by removing the bolts connected to the equipment flange. However, the tube sheet is welded to the head and the connecting pipe and is placed outside one end of the shell cylinder. The tube sheet must be placed at the head flange, thereby limiting the length of the tube bundle. When the height of the cylinder is constant and the heat exchange demand is low, the length of the tube bundle occupies the entire cylinder, which increases the material cost and manufacturing difficulty.

[0005] CN205679094U discloses a heat exchanger with a tube sheet built-in structure, but the tube bundle cannot be disassembled and cleaned.

[0006] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides a heat exchanger with a new tube sheet structure, which can be easily disassembled and cleaned; when the shell-side cylinder height is fixed and the heat exchange requirements are met, the length of the tube bundle can be reduced, the material cost can be reduced, and the difficulty of processing and manufacturing can be reduced.

[0008] The utility model adopts the following technical scheme: a heat exchanger with a new tube sheet structure, comprising:

[0009] The guide tube is arranged at the upper part of the inner cavity of the shell side cylinder, the lower end of the guide tube is connected and welded to the upper tube plate; the upper end of the guide tube is welded and fixed with the tube side upper head.

[0010] The tube bundle is arranged in the lower part of the shell-side cylinder cavity; the lower end of the tube bundle is fixedly connected to the lower tube sheet, and the upper end is fixedly connected to the upper tube sheet; the lower tube sheet is connected to the inner side of the lower flange through fasteners;

[0011] A shell side upper head, wherein a first upper flange is welded and fixed to the lower end of the shell side upper head; a second upper flange is welded to the upper end of the shell side cylinder, and the first upper flange and the second upper flange are connected by bolts;

[0012] The tube-side upper head is arranged inside the shell-side upper head.

[0013] Furthermore, the tube-side upper head is connected to the inner wall of the shell-side upper head through tie rods.

[0014] Furthermore, a shell-side pipe is connected to the upper portion of the shell-side cylinder; and an upper tube plate is arranged below the shell-side pipe.

[0015] Furthermore, a first baffle and a second baffle are provided on opposite sides of the inner wall of the guide tube, and the first baffle and the second baffle are alternately arranged along the axial direction of the guide tube; one end of the first baffle and the second baffle is connected to the inner wall of one side of the guide tube, and a gap is formed between the other end and the inner wall on the opposite side of the guide tube.

[0016] Furthermore, a tie-type spoiler is provided in the guide tube.

[0017] Furthermore, a lower pipe-side head is fixedly connected to the lower flange, and an elbow is welded to the lower end of the lower pipe-side head.

[0018] Furthermore, the tube bundle is coaxially arranged with the shell-side cylinder; and both ends of the tube bundle adopt a tapered closing structure.

[0019] Furthermore, a gasket is provided between the lower tube plate and the lower flange, the outer diameter of the gasket is not greater than the diameter of the lower tube plate, and the inner diameter of the gasket is greater than the inner diameter of the lower head of the tube pass.

[0020] Furthermore, the top of the tube-side upper head is connected to an upper connecting pipe, and the upper connecting pipe extends out of the shell-side upper head.

[0021] Furthermore, the number of the tie bars is not less than three, and the tie bars are evenly distributed circumferentially around the axis of the shell cylinder.

[0022] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0023] The new type can be easily disassembled. Only the bolts connecting the first and second upper flanges and the bolts between the lower flange and the lower tube sheet are removed, and the shell side cylinder can be removed from the tube bundle, which is convenient for cleaning the tube bundle and the shell side, and plugging the broken heat exchange tube. The structure is safe and reliable, easy to disassemble and assemble, and easy to repair.

[0024] The utility model is provided with a guide tube, which can reduce the length of the tube bundle, reduce material costs, reduce processing and manufacturing difficulty, and improve equipment rigidity and increase equipment life while keeping the height size of the tube body fixed and meeting the heat exchange requirements.

[0025] The utility model embeds the upper end cap of the tube side and the guide tube into the inner cavity of the shell side component to participate in heat exchange, thereby improving heat exchange efficiency and reducing costs.

[0026] The two ends of the tube bundle of the utility model adopt a closed form, and the upper and lower tube sheets are built into the shell-side cylinder, which can greatly reduce the diameter and thickness of the tube sheets, save materials, reduce manufacturing costs for enterprises, and improve the competitiveness of manufacturers; at the same time, the entire upper tube sheet is inside the cylinder, which helps to improve the heat exchange effect.

[0027] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Example 1;

[0029] Figure 2 is a schematic structural diagram of Example 2;

[0030] Figure 3 It is a structural schematic diagram of Example 3.

[0031] In the figure,

[0032] 1-elbow, 2-tube side lower head, 3-fastener, 4-lower flange, 5-gasket, 6-lower tube sheet, 7-tube bundle, 8-upper tube sheet, 9-guide tube, 10-tube side upper head, 11-upper connecting pipe, 12-tensioning rod, 13-shell side upper head, 14-first upper flange, 15-second upper flange, 16-shell side connecting pipe, 17-shell side cylinder, 18-first spoiler, 19-second spoiler, 20-tie type spoiler. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0034] Example 1

[0035] like Figure 1 As shown, the utility model provides a heat exchanger with a novel tube sheet structure, comprising:

[0036] The shell-side assembly comprises a shell-side cylinder 17 , the upper end of which is detachably connected to an upper tube box assembly; the lower end of which is welded to a lower flange 4 .

[0037] The upper tube box assembly includes a shell side upper head 13, and a first upper flange 14 is welded and fixed to the lower end of the shell side upper head 13; a second upper flange 15 is welded to the upper end of the shell side cylinder 17, and the first upper flange 14 and the second upper flange 15 are connected by bolts.

[0038] The tube bundle assembly is arranged in the inner cavity of the shell side assembly, specifically, the tube bundle assembly is arranged in the lower part of the inner cavity of the shell side cylinder 17; the tube bundle assembly includes a tube bundle 7, the lower end of the tube bundle 7 is fixedly connected to the lower tube sheet 6, and the upper end is fixedly connected to the upper tube sheet 8. The tube bundle 7 is coaxially arranged with the shell side cylinder 17; both ends of the tube bundle 7 adopt a tapered closing structure.

[0039] The lower tube sheet 6 is arranged inside the shell side cylinder 17, and is connected to the inner side of the lower flange 4 by fasteners 3, so that the tube bundle can be disassembled, and the tube bundle and the shell can be cleaned. The fasteners 3 are preferably bolts.

[0040] A gasket 5 is arranged between the lower tube sheet 6 and the lower flange 4. The outer diameter of the gasket 5 is not larger than the diameter of the lower tube sheet 6, and the inner diameter is larger than the inner diameter of the lower head 2 of the pipe pass, so as to ensure the compression of the gasket 5, achieve good sealing and prevent leakage.

[0041] The tube-side flow guide assembly is built into the inner cavity of the shell-side assembly, the tube-side flow guide assembly is arranged at the upper part of the inner cavity of the shell-side cylinder 17, and the tube-side flow guide assembly is arranged above the tube bundle assembly; the tube-side flow guide assembly includes a flow guide cylinder 9, the lower end of the flow guide cylinder 9 is welded and fixed to the upper tube plate 8, the upper end of the flow guide cylinder 9 is welded and fixed with a tube-side upper head 10, and the tube-side upper head 10 is arranged inside the shell-side upper head 13; the tube-side upper head 10 is connected to the inner wall of the shell-side upper head 13 through a tie rod 12, so as to reduce the pulling-off force on the connecting pipe and improve the strength.

[0042] The number of tie bars 12 is not less than three, and the tie bars 12 are evenly distributed around the axis of the shell cylinder 17 to evenly distribute the stress and prevent the welding from falling off due to the gravity of the tube bundle during the disassembly process.

[0043] The top of the tube-side upper head 10 is connected to an upper connecting pipe 11 , and the upper connecting pipe 11 extends out of the shell-side upper head 13 .

[0044] A lower pipe box assembly is welded at the lower end of the shell side assembly, and the lower pipe box assembly includes a pipe side lower head 2 welded to the lower flange 4, and an elbow 1 is welded at the lower end of the pipe side lower head 2. The elbow 1 can change the orientation of the pipe side inlet and outlet to adapt to the side inlet / outlet pipeline layout.

[0045] The upper part of the shell-side cylinder 17 is connected with the shell-side pipe 16; the upper tube sheet 8 is arranged below the shell-side pipe 16 to ensure that the draft tube has enough length for sufficient heat exchange and reduce the length of the tube bundle.

[0046] The specific processing steps of this utility model are:

[0047] S1, elbow 1, and pipe lower head 2 are welded together to form a lower pipe box assembly.

[0048] S2, the lower flange 4, the second upper flange 15, and the shell-side cylinder 17 are welded together to form a shell-side assembly.

[0049] S3, the shell side upper head 13 and the first upper flange 14 are welded together to form an upper tube box assembly.

[0050] S4, the guide tube 9, the tube side upper head 10, and the upper connecting pipe 11 are welded together to form a tube side guide assembly, and the tube side guide assembly participates in heat exchange in the shell side cylinder 17 to improve the heat exchange efficiency.

[0051] S5, the lower tube sheet 6, the tube bundle 7, and the upper tube sheet 8 are wound, welded, and expanded to form a tube bundle assembly. The tube bundle assembly adopts a closed structure, and the upper tube sheet is built-in, which can effectively reduce the diameter of the tube sheet, reduce costs, and enhance the heat exchange effect.

[0052] S6, weld the tube bundle assembly, tube guide assembly, shell assembly and tie rods together, and weld the last weld of the upper pipe 11 last, effectively ensuring the pipe extension and the overall height of the equipment.

[0053] S7, weld the lower tube box assembly and the shell side assembly together.

[0054] S8, insert the bolts into the lower equipment flange 4, then insert the gasket 5 into the bolts, then insert the tube bundle into the cylinder assembly, then tighten the bolts, and finally connect and tighten the upper tube box assembly and the second upper flange 15 with bolts.

[0055] Example 2

[0056] like Figure 2 As shown, the utility model provides a heat exchanger with a novel tube sheet structure. The difference between this embodiment and embodiment 1 is that: a first baffle 18 and a second baffle 19 are provided on opposite sides of the inner wall of the guide tube 9, and the first baffle 18 and the second baffle 19 are alternately arranged along the axial direction of the guide tube 9; one end of the first baffle 18 and the second baffle 19 is connected to the inner wall of one side of the guide tube 9, and a gap is formed between the other end and the inner wall on the opposite side of the guide tube 9.

[0057] The first baffle 18 and the second baffle 19 are spoilers of a plate structure, which reduce the impact of the medium on the tube sheet, enhance the spoiler and improve the heat exchange effect.

[0058] Example 3

[0059] like Figure 3As shown, the utility model provides a heat exchanger with a novel tube sheet structure. The difference between this embodiment and embodiment 1 is that a link type spoiler 20 is provided in the guide tube 9, and part of the side wall of the link type spoiler 20 is welded and fixed to the inner wall of the guide tube 9.

[0060] The tie-type spoiler 20 can also reduce the impact of the medium on the tube sheet, enhance the turbulence, and improve the heat exchange effect.

[0061] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A heat exchanger with a novel tube sheet structure, characterized in that: include: A flow guide tube (9), wherein the flow guide tube (9) is arranged at the upper part of the inner cavity of the shell side cylinder (17), the lower end of the flow guide tube (9) is connected to the upper tube plate (8) by welding and fixed; the upper end of the flow guide tube (9) is welded and fixed with the tube side upper head (10), A tube bundle (7), the tube bundle (7) being arranged at the lower part of the inner cavity of the shell-side cylinder (17); the lower end of the tube bundle (7) is fixedly connected to the lower tube sheet (6), and the upper end is fixedly connected to the upper tube sheet (8); the lower tube sheet (6) is connected to the inner side of the lower flange (4) via a fastener (3); A shell side upper head (13), wherein a first upper flange (14) is welded and fixed to the lower end of the shell side upper head (13); a second upper flange (15) is welded to the upper end of the shell side cylinder (17), and the first upper flange (14) and the second upper flange (15) are connected by bolts; The tube-side upper head (10) is arranged inside the shell-side upper head (13).

2. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: The tube-side upper end cap (10) is connected to the inner wall of the shell-side upper end cap (13) via tie rods (12).

3. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: The upper portion of the shell-side cylinder (17) is connected to a shell-side pipe (16); the upper tube sheet (8) is arranged below the shell-side pipe (16).

4. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: A first baffle plate (18) and a second baffle plate (19) are provided on opposite sides of the inner wall of the guide tube (9), and the first baffle plate (18) and the second baffle plate (19) are alternately arranged along the axial direction of the guide tube (9); one end of the first baffle plate (18) and the second baffle plate (19) are connected to the inner wall of one side of the guide tube (9), and a gap is formed between the other end and the inner wall of the opposite side of the guide tube (9).

5. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: A tie-type spoiler (20) is provided in the guide tube (9).

6. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: The lower flange (4) is fixedly connected to a lower pipe end cap (2), and an elbow (1) is welded to the lower end of the lower pipe end cap (2).

7. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: The tube bundle (7) is coaxially arranged with the shell-side cylinder (17); both ends of the tube bundle (7) adopt a tapered closing structure.

8. A heat exchanger with a novel tube sheet structure as claimed in claim 6, characterized in that: A gasket (5) is provided between the lower tube plate (6) and the lower flange (4); the outer diameter of the gasket (5) is no greater than the diameter of the lower tube plate (6), and the inner diameter of the gasket (5) is greater than the inner diameter of the lower end cap (2) of the tube pass.

9. A heat exchanger with a novel tube sheet structure as claimed in claim 1, characterized in that: The top of the tube-side upper head (10) is connected to an upper connecting pipe (11), and the upper connecting pipe (11) extends out of the shell-side upper head (13).

10. A heat exchanger with a novel tube sheet structure as claimed in claim 2, characterized in that: The number of the tie bars (12) is no less than three, and the tie bars (12) are evenly distributed circumferentially around the axis of the shell cylinder (17).

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