Floating head heat exchanger with expansion joint

Abstract

The utility model discloses a floating head type heat exchanger with an expansion joint, and relates to the technical field of heat exchangers. The floating head type heat exchanger with the expansion joint comprises a shell, a limiting barrel is fixedly connected to the right side of the inner wall of the shell, the expansion joint is slidably connected into the limiting barrel, a floating head cover is fixedly connected to the end, away from the limiting barrel, of the expansion joint and fixedly connected with a second fixing plate, and flanges are fixedly connected to the two ends of the expansion joint correspondingly; the flanges are fixedly connected with the floating head cover through bolts, the flanges are fixedly connected to the two ends of the expansion joint, the second fixing plate slides on the inner wall of the shell, the second fixing plate drives the floating head cover to slide, deformation of the expansion joint is caused, and the expansion joint can make the second fixing plate regularly slide on the inner wall of the shell. Thermal expansion of the pipeline due to different temperatures is avoided, thermal stress can be eliminated, the pipeline and the second fixing plate are prevented from being damaged, normal use of the heat exchanger is guaranteed, and the requirements of people are met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a floating head type heat exchanger with an expansion joint. Background Art

[0002] In the floating head heat exchanger, only one end of the tube sheet at both ends is fixed to the shell, and the other end can move freely relative to the shell, which is called a floating head. The floating head consists of a floating tube sheet, a hook ring and a floating head end cover. It is a detachable connection, and the tube bundle can be pulled out of the shell. The thermal deformation of the tube bundle and the shell is not constrained, so no thermal stress will be generated. Its advantage is that it is easy to clean between and inside the tubes, and no thermal stress will be generated; but its structure is complex, the cost is higher than that of the fixed tube sheet heat exchanger, the equipment is bulky, the material consumption is large, and the small cover at the floating head end cannot be checked during operation. The sealing requirements are high during manufacturing. It is suitable for occasions where the wall temperature difference between the shell and the tube bundle is large or the shell side medium is prone to scaling.

[0003] When the existing heat exchanger is in use, the pipes in the heat exchanger will expand due to the different temperatures, which will cause the pipes and the pipe connecting plates to be easily damaged, thereby affecting the stability of the heat exchanger during use and causing trouble to the staff. Moreover, when the inside of the heat exchanger needs to be repaired, it is inconvenient to disassemble it. Therefore, a floating head heat exchanger with an expansion joint is needed. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a floating head heat exchanger with an expansion joint, which can solve the problem that the pipes in the heat exchanger will expand due to different temperatures, causing the pipes and pipe connecting plates to be easily damaged, thereby affecting the stability of the heat exchanger during use.

[0005] To achieve the above object, the utility model provides the following technical solution: a floating head heat exchanger with an expansion joint, comprising a shell, both ends of the shell are fixedly connected to a first mounting plate, the right side of the shell is fixedly connected to a liquid inlet pipe, and the left side of the shell is fixedly connected to a liquid outlet;

[0006] Wherein, a first installation box and a second installation box are respectively provided on both sides of the shell, a second installation plate is fixedly connected to a side of the first installation box close to the shell, and the second installation plate is fixedly connected to the first installation plate by bolts;

[0007] Wherein, a third mounting plate is fixedly connected to one side of the second mounting box close to the outer shell, and the third mounting plate is fixedly connected to the first mounting plate by bolts;

[0008] Wherein, the bottom of the shell is fixedly connected with two bases.

[0009] Preferably, a cold medium inlet is fixedly connected to the top of the second installation box, and a cold medium outlet is fixedly connected to the bottom of the second installation box.

[0010] Preferably, a partition plate is fixedly connected to the inner center of the second installation box.

[0011] Preferably, a first fixing plate is fixedly connected to the interior of the shell, a second fixing plate is slidably connected to the interior of the shell, and a plurality of pipes are fixedly connected between the first fixing plate and the second fixing plate.

[0012] Preferably, the surfaces of the first fixing plate and the second fixing plate are both provided with openings adapted to the pipeline.

[0013] Preferably, the inner wall of the shell is fixedly connected to a flow limiting plate, and a through hole matching the pipeline is opened on the surface of the flow limiting plate.

[0014] Preferably, a limiting cylinder is fixedly connected to the right side of the inner wall of the shell, an expansion joint is slidably connected inside the limiting cylinder, a floating head cover is fixedly connected to one end of the expansion joint away from the limiting cylinder, and the floating head cover is fixedly connected to the second fixing plate;

[0015] Preferably, flanges are fixedly connected to both ends of the expansion joint, and the flanges are fixedly connected to the floating head cover by bolts.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) In the floating head heat exchanger with an expansion joint, the pipeline will expand due to heat during operation of the device, driving the second fixed plate to slide on the inner wall of the shell. The second fixed plate drives the floating head cover to slide, causing the expansion joint to deform. The expansion joint can make the second fixed plate slide regularly on the inner wall of the shell, avoiding thermal expansion of the pipeline due to different temperatures, eliminating thermal stress, and preventing damage to the pipeline and the second fixed plate, thereby ensuring the normal use of the heat exchanger and meeting people's needs.

[0018] (2) In the floating head heat exchanger with expansion joint, the second mounting plate is fixedly connected to the first mounting plate by bolts. During installation, the first mounting plate and the second mounting plate can be fixed by bolts, so that the first mounting box and the outer shell can be disassembled, which is convenient for cleaning and maintenance of the inside of the device. The flow limiting plate on the inner wall of the outer shell can limit the flow rate of the heat medium, making the flow rate of the heat medium slower and able to fully contact the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a schematic diagram of the main body of the utility model;

[0021] Figure 2 It is an internal schematic diagram of the utility model;

[0022] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of a first fixing plate of the utility model;

[0024] Figure 5 It is a schematic diagram of the current limiting plate of the utility model.

[0025] Figure numerals: 1, shell; 2, first mounting plate; 3, second mounting plate; 4, first mounting box; 5, liquid inlet pipe; 6, base; 7, cold medium outlet; 8, second mounting box; 9, cold medium inlet; 10, third mounting plate; 11, liquid outlet; 12, partition plate; 13, pipeline; 14, flow limiting plate; 15, floating head cover; 16, limiting cylinder; 17, flange; 18, expansion joint; 19, second fixed plate; 20, first fixed plate; 21, opening; 22, through hole. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] See also Figure 1-5The utility model provides a technical solution: a floating head heat exchanger with an expansion joint, comprising a shell 1, both ends of the shell 1 are fixedly connected with a first mounting plate 2, the right side of the shell 1 is fixedly connected with a liquid inlet pipe 5, and a medium with a high temperature can flow into the interior of the shell 1 through the liquid inlet pipe 5, the left side of the shell 1 is fixedly connected with a liquid outlet 11, and the treated medium flows out from the liquid outlet 11, and the bottom of the shell 1 is fixedly connected with two bases 6, and the base 6 is used for supporting and fixing the device;

[0031] Wherein, a first installation box 4 and a second installation box 8 are respectively provided on both sides of the housing 1, and a second installation plate 3 is fixedly connected to a side of the first installation box 4 close to the housing 1, and the second installation plate 3 is fixedly connected to the first installation plate 2 by bolts. During installation, the first installation plate 2 and the second installation plate 3 can be fixed by bolts, so that the first installation box 4 and the housing 1 can be detached, which is convenient for cleaning and maintenance of the inside of the device;

[0032] Among them, the second installation box 8 is fixedly connected to the side close to the outer shell 1 with a third installation disk 10, and the third installation disk 10 is fixedly connected to the first installation disk 2 by bolts. The first installation disk 2 and the third installation disk 10 can be fixed by bolts to realize the detachability of the second installation box 8 and the outer shell 1. The top of the second installation box 8 is fixedly connected to a cold medium inlet 9, and the bottom of the second installation box 8 is fixedly connected to a cold medium outlet 7. The inner center of the second installation box 8 is fixedly connected to a partition plate 12, and the partition plate 12 divides the interior of the second installation box 8 into two spaces. The cold medium enters the interior of the device from the cold medium inlet 9, and then flows out from the cold medium outlet 7.

[0033] Furthermore, a first fixing plate 20 is fixedly connected to the inside of the housing 1, a second fixing plate 19 is slidably connected to the inside of the housing 1, a plurality of pipes 13 are fixedly connected between the first fixing plate 20 and the second fixing plate 19, openings 21 adapted to the pipes 13 are provided on the surfaces of the first fixing plate 20 and the second fixing plate 19, a limiting plate 14 is fixedly connected to the inner wall of the housing 1, and a through hole 22 adapted to the pipes 13 is provided on the surface of the limiting plate 14;

[0034] Among them, the right side of the inner wall of the shell 1 is fixedly connected to the limiting cylinder 16, and the inside of the limiting cylinder 16 is slidably connected with an expansion joint 18. The end of the expansion joint 18 away from the limiting cylinder 16 is fixedly connected to the floating head cover 15, and the floating head cover 15 is fixedly connected to the second fixed plate 19. Both ends of the expansion joint 18 are fixedly connected to flanges 17, and the flange 17 is fixedly connected to the floating head cover 15 by bolts. During installation, the second mounting disk 3 on the first mounting box 4 is aligned with the first mounting disk 2. At this time, the flange 17 on the expansion joint 18 will slide inside the limiting cylinder 16, and then the bolts are tightened to fix the first mounting box 4 to the shell 1. During operation, the hot medium flows into the interior of the shell 1 from the liquid inlet pipe 5, and the cold medium flows into the interior of the second mounting box 8 from the cold medium inlet 9. Then the cold medium passes through the pipeline on the first fixed plate 20 to The heat medium flows to the right, and the heat medium flows to the left inside the shell 1. The flow limiting plate 14 on the inner wall of the shell 1 can limit the flow rate of the heat medium, making the flow rate of the heat medium slower and able to fully contact the pipeline, and then flows out through the liquid outlet 11, and the cold medium flows out through the cold medium outlet 7 to complete the heat exchange operation. The pipeline 13 will expand due to heat during the operation of the device, driving the second fixed plate 19 to slide on the inner wall of the shell 1. The second fixed plate 19 drives the floating head cover 15 to slide, causing the expansion joint 18 to deform. The expansion joint 18 can make the second fixed plate 19 slide regularly on the inner wall of the shell 1, avoiding thermal expansion of the pipeline 13 due to different temperatures, and eliminating thermal stress to prevent damage to the pipeline 13 and the second fixed plate 19, thereby ensuring the normal use of the heat exchanger and meeting people's needs.

[0035] Working principle: During installation, align the second mounting plate 3 on the first mounting box 4 with the first mounting plate 2. At this time, the flange 17 on the expansion joint 18 will slide inside the limiting cylinder 16, and then tighten the bolts to fix the first mounting box 4 to the shell 1, and then let the hot medium flow into the inside of the shell 1 from the liquid inlet pipe 5, and let the cold medium flow into the inside of the second mounting box 8 from the cold medium inlet 9. Then the cold medium flows to the right through the pipeline on the first fixed plate 20, and the hot medium flows to the left inside the shell 1. At this time, the pipeline 13 expands due to heat, driving the second fixed plate 19 to slide on the inner wall of the shell 1, and the second fixed plate 19 drives the floating head cover 15 to slide, causing the expansion joint 18 to deform. The expansion joint 18 can make the second fixed plate 19 slide regularly on the inner wall of the shell 1 to eliminate thermal stress. The flow limiting plate 14 on the inner wall of the shell 1 can limit the flow rate of the hot medium, making the flow rate of the hot medium slower and able to fully contact with the pipeline 13, and then flows out through the liquid outlet 11, and the cold medium flows out through the cold medium outlet 7 to complete the heat exchange operation.

[0036] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A floating head heat exchanger with an expansion joint, comprising a housing (1), characterized in that: Both ends of the housing (1) are fixedly connected to a first mounting plate (2), the right side of the housing (1) is fixedly connected to a liquid inlet pipe (5), and the left side of the housing (1) is fixedly connected to a liquid outlet (11); Wherein, a first installation box (4) and a second installation box (8) are respectively provided on both sides of the outer shell (1); a second installation plate (3) is fixedly connected to a side of the first installation box (4) close to the outer shell (1); and the second installation plate (3) is fixedly connected to the first installation plate (2) by bolts; Wherein, a third mounting plate (10) is fixedly connected to a side of the second mounting box (8) close to the housing (1), and the third mounting plate (10) is fixedly connected to the first mounting plate (2) by bolts; The bottom of the housing (1) is fixedly connected to two bases (6).

2. The floating head heat exchanger with expansion joint according to claim 1, characterized in that: The top of the second installation box (8) is fixedly connected to a cold medium inlet (9), and the bottom of the second installation box (8) is fixedly connected to a cold medium outlet (7).

3. The floating head heat exchanger with expansion joint according to claim 1, characterized in that: A partition plate (12) is fixedly connected to the inner center of the second installation box (8).

4. The floating head heat exchanger with expansion joint according to claim 1, characterized in that: A first fixing plate (20) is fixedly connected to the interior of the shell (1), a second fixing plate (19) is slidably connected to the interior of the shell (1), and a plurality of pipes (13) are fixedly connected between the first fixing plate (20) and the second fixing plate (19).

5. The floating head heat exchanger with expansion joint according to claim 4, characterized in that: The surfaces of the first fixing plate (20) and the second fixing plate (19) are both provided with openings (21) adapted to the pipeline (13).

6. The floating head heat exchanger with expansion joint according to claim 1, characterized in that: The inner wall of the housing (1) is fixedly connected to a flow limiting plate (14), and a through hole (22) adapted to the pipeline (13) is provided on the surface of the flow limiting plate (14).

7. The floating head heat exchanger with expansion joint according to claim 1, characterized in that: The right side of the inner wall of the housing (1) is fixedly connected to a limiting cylinder (16), the interior of the limiting cylinder (16) is slidably connected to an expansion joint (18), one end of the expansion joint (18) away from the limiting cylinder (16) is fixedly connected to a floating head cover (15), and the floating head cover (15) is fixedly connected to a second fixing plate (19).

8. The floating head heat exchanger with expansion joint according to claim 7, characterized in that: Both ends of the expansion joint (18) are fixedly connected with flanges (17), and the flanges (17) are fixedly connected to the floating head cover (15) by bolts.

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