Shell-and-tube heat exchanger

Abstract

The utility model provides a shell-and-tube heat exchanger which comprises a cylinder body, a first cylinder cover is arranged at the lower end of the cylinder body in a contact mode, a first screw penetrates through the first cylinder cover and penetrates through the cylinder body, a first nut is connected to the first screw in a threaded mode, a first tube plate is arranged at the upper end of the cylinder body in a contact mode, and a second tube plate is arranged at the lower end of the cylinder body. A first through hole is formed in the first tube plate, and the upper end of the first tube plate is in contact with a second barrel cover. The first tube plate is fixedly connected with the cylinder body and the second cylinder cover through the second screw rod and the second nut, one end of the heat exchange tube penetrates through the second through hole and the connector and is in threaded connection with the heat exchange tube through the first threaded sleeve, the first screw rod and the first nut can be detached according to conditions and requirements, and the first cylinder cover is taken down. The first threaded sleeve and the second threaded sleeve are detached, fixing of one end of the heat exchange tube is loosened, the second threaded rod and the second nut are detached, the second barrel cover is taken down, and the heat exchange tube can be conveniently pulled out through the first tube plate to be cleaned and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of shell and tube heat exchangers, in particular to a shell and tube heat exchanger. Background Art

[0002] Shell and tube heat exchangers generally include fixed tube sheet heat exchangers, U-tube heat exchangers and floating head heat exchangers, etc. Among them, the fixed tube sheet heat exchanger is mainly composed of tube sheets fixedly installed at both ends of the heat exchanger cylinder, and a tube bundle is arranged between the two tube sheets. The cold medium is transported through the tube bundle. The cylinder is provided with a hot medium inlet pipe and an outlet pipe. The hot medium enters the cylinder through the inlet pipe and exchanges heat with the cold medium transported in the tube bundle, and then is output through the outlet pipe. An expansion joint is arranged on the cylinder to eliminate stress. It is suitable for heat exchange between cold and hot media with a small temperature difference.

[0003] Since both ends of the existing fixed tube plate heat exchanger are fixedly arranged, impurities are accumulated on the outer side of the internal heat exchange tubes for a long time, which easily affects the heat exchange effect and is inconvenient to clean.

[0004] In summary, there is a need for a shell and tube heat exchanger. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a shell and tube heat exchanger, which solves the problems mentioned in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A shell and tube heat exchanger includes a cylinder, the lower end of the cylinder is in contact with a first cylinder cover, the first cylinder cover is penetrated by a first screw, the first screw penetrates the cylinder, the first screw is threadedly connected to a first nut, the upper end of the cylinder is in contact with a first tube sheet, the first tube sheet is provided with a first through hole, the upper end of the first tube sheet is in contact with a second cylinder cover, the second cylinder cover is penetrated by a second screw, one end of the second screw penetrates the first tube sheet and the cylinder, and the second screw is threadedly connected to a second nut.

[0008] Furthermore, a first connecting pipe is connected to the left side of the cylinder, a second connecting pipe is connected to the right side of the cylinder, and a heat exchange pipe is fixedly provided on the first tube sheet.

[0009] Furthermore, one end of the heat exchange tube away from the first tube sheet passes through the second through hole and the joint, the second through hole is opened on the second tube sheet, the second tube sheet is arranged near the bottom inside the cylinder, the joint is arranged at the lower end of the second tube sheet, and the joint, the second through hole and the heat exchange tube correspond one to one.

[0010] Furthermore, one end of the heat exchange tube away from the first tube sheet is threadedly connected with a first threaded sleeve, and a limiting block is provided near the bottom of the outer ring of the first threaded sleeve.

[0011] Furthermore, a first sealing ring is provided between the first threaded sleeve and the joint, a second threaded sleeve passes through the outer ring of the first threaded sleeve, the second threaded sleeve is threadedly connected to the joint, and a second sealing ring is provided between the second threaded sleeve and the first threaded sleeve.

[0012] Furthermore, a baffle is provided through the outer side of the heat exchange tube, the heat exchange tubes arranged on the first tube sheet form a tube bundle, an anti-collision plate is provided through the outer side of the tube bundle, and the anti-collision plate is arranged on the outer side of the baffle.

[0013] The utility model provides a shell and tube heat exchanger. Compared with the prior art, it has the following beneficial effects:

[0014] The first tube sheet is connected and fixed by the second screw, the second nut, the cylinder body and the second cylinder cover. One end of the heat exchange tube is fixed on the first tube sheet, and the other end passes through the second through hole and the joint. The heat exchange tube is threadedly connected to the first threaded sleeve and the heat exchange tube. The second threaded sleeve and the joint are threadedly adjusted. The sealing between the first threaded sleeve and the joint and the first threaded sleeve and the second threaded sleeve is enhanced under the action of the first sealing ring and the second sealing ring. According to the situation, the first screw and the first nut can be disassembled, the first cylinder cover can be removed, the first threaded sleeve and the second threaded sleeve can be disassembled, the fixation of one end of the heat exchange tube can be loosened, the second screw and the second nut can be disassembled, and the second cylinder cover can be removed, so that the heat exchange tube can be conveniently pulled out through the first tube sheet for cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The schematic diagram of the heat exchange tube, baffle and anti-collision plate structure of the utility model is shown;

[0017] Figure 2 The utility model is shown in a front view cross-sectional structure diagram of the cylinder;

[0018] Figure 3 A schematic diagram of the structure of the first tube sheet and the first through hole of the utility model is shown;

[0019] Figure 4 The schematic diagram of the second tube sheet, heat exchange tubes and joints of the utility model is shown;

[0020] Figure 5 It shows a schematic structural diagram of the first threaded sleeve and the second threaded sleeve of the utility model;

[0021] Figure 6 It shows a schematic diagram of the second tube plate and the second through hole structure of the utility model;

[0022] As shown in the figure: 1. cylinder; 2. first cylinder cover; 3. first screw; 4. first nut; 5. first tube sheet; 6. first through hole; 7. second cylinder cover; 8. second screw; 9. second nut; 10. first connecting pipe; 11. second connecting pipe; 12. heat exchange tube; 13. second through hole; 14. joint; 15. second tube sheet; 16. first threaded sleeve; 17. limit block; 18. first sealing ring; 19. second threaded sleeve; 20. second sealing ring; 21. anti-collision plate; 22. baffle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] In order to solve the technical problems in the background technology, a shell and tube heat exchanger is provided as follows:

[0026] Combination Figure 1-Figure 6 As shown, the utility model provides a shell and tube heat exchanger, including a cylinder 1, the lower end of the cylinder 1 is contacted with a first cylinder cover 2, the first cylinder cover 2 is penetrated by a first screw 3, the first screw 3 penetrates the cylinder 1, the first screw 3 is threadedly connected to a first nut 4, the upper end of the cylinder 1 is contacted with a first tube sheet 5, the first tube sheet 5 is provided with a first through hole 6, the upper end of the first tube sheet 5 is contacted with a second cylinder cover 7, the second cylinder cover 7 is penetrated by a second screw 8, one end of the second screw 8 penetrates the first tube sheet 5 and the cylinder 1, and the second screw 8 is threadedly connected to a second nut 9.

[0027] In this embodiment, a first connecting pipe 10 is connected to the left side of the cylinder 1, and a second connecting pipe 11 is connected to the right side of the cylinder 1. A heat exchange tube 12 is fixedly penetrated on the first tube sheet 5. One end of the heat exchange tube 12 away from the first tube sheet 5 penetrates the second through hole 13 and the joint 14. The second through hole 13 is provided on the second tube sheet 15. The second tube sheet 15 is provided near the bottom inside the cylinder 1. The joint 14 is provided at the lower end of the second tube sheet 15. The joint 14, the second through hole 13 and the heat exchange tube 12 correspond one to one.

[0028] The heat exchange tube 12 passes through the second through hole 13 and the joint 14, and is threadedly connected to the heat exchange tube 12 through the first threaded sleeve 16. The second threaded sleeve 19 is slidably adjusted to be threadedly connected to the joint 14, which is used to fix one end of the heat exchange tube 12. The subsequent disassembly is convenient for extraction, cleaning and maintenance. A seal is provided between the cylinder 1 and the first cylinder cover 2, and a seal is provided between the cylinder 1 and the first tube sheet 5 and between the first tube sheet 5 and the second cylinder cover 7.

[0029] Embodiment 2

[0030] like Figure 1-Figure 6 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0031] In this embodiment, the end of the heat exchange tube 12 away from the first tube sheet 5 is threadedly connected with a first threaded sleeve 16, a limiting block 17 is provided near the bottom of the outer ring of the first threaded sleeve 16, a first sealing ring 18 is provided between the first threaded sleeve 16 and the joint 14, a second threaded sleeve 19 passes through the outer ring of the first threaded sleeve 16, the second threaded sleeve 19 is threadedly connected to the joint 14, and a second sealing ring 20 is provided between the second threaded sleeve 19 and the first threaded sleeve 16.

[0032] The sealing between the first threaded sleeve 16 and the joint 14 and between the first threaded sleeve 16 and the second threaded sleeve 19 is enhanced by the first sealing ring 18 and the second sealing ring 20 .

[0033] Embodiment 3

[0034] like Figure 1-Figure 6 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0035] In this embodiment, a baffle 22 is provided through the outer side of the heat exchange tube 12 , the heat exchange tube 12 arranged on the first tube sheet 5 forms a tube bundle, and a bumper plate 21 is provided through the outer side of the tube bundle, and the bumper plate 21 is arranged on the outer side of the baffle 22 .

[0036] The impact of the heat medium on the tube bundle when entering or exiting is reduced by the anti-impact plate 21.

[0037] The working principle and use process of this utility model:

[0038] In use:

[0039] The first step: connect the first connecting pipe 10 and the second connecting pipe 11 to the inlet pipe and outlet pipe of the external heat medium respectively, connect the pipe opening on the first cylinder cover 2 to the outlet pipe of the external cold medium, and connect the pipe opening on the second cylinder cover 7 to the inlet pipe of the external cold medium.

[0040] Step 2: The cold medium enters through the second tube cover 7, flows through the heat exchange tube 12 and flows out through the first tube cover 2, and the hot medium flows into the cylinder 1 through the first connecting pipe 10. The baffle 22 helps to prolong the flow of the hot medium in the cylinder 1, which helps to fully exchange heat. The hot medium flows out through the second connecting pipe 11, and the impact of the hot medium on the tube bundle when entering and exiting is reduced by the anti-collision plate 21.

[0041] Step 3: As required, the first screw 3 and the first nut 4 can be disassembled, the first tube cover 2 can be removed, the first threaded sleeve 16 and the second threaded sleeve 19 can be removed, the fixation on one end of the heat exchange tube 12 can be loosened, the second screw 8 and the second nut 9 can be removed, and the second tube cover 7 can be removed to facilitate the heat exchange tube 12 to be pulled out through the first tube sheet 5 for cleaning and maintenance.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shell and tube heat exchanger, characterized in that: The invention comprises a barrel (1), wherein the lower end of the barrel (1) is provided with a first barrel cover (2), the first barrel cover (2) is penetrated by a first screw rod (3), the first screw rod (3) penetrates the barrel (1), the first screw rod (3) is threadedly connected to a first nut (4), the upper end of the barrel (1) is provided with a first tube sheet (5), the first tube sheet (5) is provided with a first through hole (6), the upper end of the first tube sheet (5) is provided with a second barrel cover (7), the second barrel cover (7) is penetrated by a second screw rod (8), one end of the second screw rod (8) penetrates the first tube sheet (5) and the barrel (1), and the second screw rod (8) is threadedly connected to a second nut (9).

2. A shell and tube heat exchanger according to claim 1, characterized in that: The left side of the cylinder (1) is connected to a first connecting pipe (10), the right side of the cylinder (1) is connected to a second connecting pipe (11), and a heat exchange pipe (12) is fixedly provided through the first tube sheet (5).

3. A shell and tube heat exchanger according to claim 2, characterized in that: One end of the heat exchange tube (12) away from the first tube sheet (5) passes through the second through hole (13) and the joint (14); the second through hole (13) is provided on the second tube sheet (15); the second tube sheet (15) is arranged near the bottom inside the cylinder (1); the joint (14) is arranged at the lower end of the second tube sheet (15); the joint (14), the second through hole (13) and the heat exchange tube (12) correspond one to one.

4. A shell and tube heat exchanger according to claim 3, characterized in that: One end of the heat exchange tube (12) away from the first tube sheet (5) is threadedly connected to a first threaded sleeve (16), and a limiting block (17) is provided near the bottom of the outer ring of the first threaded sleeve (16).

5. The shell and tube heat exchanger according to claim 4, characterized in that: A first sealing ring (18) is arranged between the first threaded sleeve (16) and the joint (14); a second threaded sleeve (19) passes through the outer ring of the first threaded sleeve (16); the second threaded sleeve (19) is threadedly connected to the joint (14); and a second sealing ring (20) is arranged between the second threaded sleeve (19) and the first threaded sleeve (16).

6. The shell and tube heat exchanger according to claim 2, characterized in that: A baffle (22) is provided through the outer side of the heat exchange tube (12); the heat exchange tube (12) provided on the first tube sheet (5) forms a tube bundle; an anti-collision plate (21) is provided through the outer side of the tube bundle; and the anti-collision plate (21) is provided on the outer side of the baffle (22).

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