Detachable single-tube-pass floating head type heat exchanger

Abstract

The utility model discloses a detachable single tube pass floating head type heat exchanger which comprises a tube box, a shell, an outer head cover, a floating head cover and an outer head cover sealing head, the two ends of the shell are connected with the tube box and the outer head cover respectively, a floating tube plate is arranged between the shell and the outer head cover, and the floating head cover is connected with the floating tube plate. An expansion joint and a first end socket flange are arranged between the floating head cover and the outer head cover end socket, one end of the expansion joint is connected with the floating head cover, and the other end of the expansion joint is connected with the first end socket flange. According to the floating head end, the flange is welded to the oval end socket in an inserted mode, the aim of being connected with a process opening is achieved, and the dismounting requirement is met. The device is simple in structure, convenient to disassemble and maintain, small in forge piece amount, light, low in manufacturing cost and convenient to install, the gasket is easy to obtain and convenient to replace, and the using function is met on the premise that the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a detachable single-tube floating head heat exchanger. Background Art

[0002] The single-pass floating head heat exchanger is a new type of heat exchanger that has appeared in recent years. That is, a bellows expansion joint is set at the floating head end of the single-pass. This structure effectively combines the advantages of the floating head heat exchanger and the fixed tube sheet heat exchanger. It can be used in situations with high temperature / high pressure / large temperature difference / crossed temperatures, and is convenient for maintenance and cleaning. However, as a non-standard structure heat exchanger, the single-pass floating head heat exchanger has very few design forms to refer to, and there is a lack of domestic design experience. The common design is to use a flat cover or equipment flange type at the floating head end, which has the following problems: large size and large number of forgings, complex structure, poor force, and high manufacturing cost; the tail of the floating head end often adopts a double-row bolt connection, which is very inconvenient to disassemble and repair. Therefore, it is necessary to design a reliable and durable structure that is both cost-saving and safe and practical. Utility Model Content

[0003] In order to solve the problems in the prior art, the utility model provides a detachable single-tube floating head heat exchanger.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detachable single-pass floating head heat exchanger, comprising a tube box, a shell, an outer head cover, a floating head cover, and an outer head cover head, wherein the two ends of the shell are respectively connected to the tube box and the outer head cover, a floating tube sheet is provided between the shell and the outer head cover, an expansion joint and a head flange are provided between the floating head cover and the outer head cover head, one end of the expansion joint is connected to the floating head cover, and the other end is connected to the head flange.

[0005] Furthermore, a connecting piece is provided between the expansion joint and the floating head cover.

[0006] Furthermore, it also includes an outer cover flange and a shell flange, and the outer cover flange and the shell flange are connected by stud bolts.

[0007] Furthermore, a hook ring and a floating head flange are respectively arranged on both sides of the floating tube sheet, and the hook ring and the floating head flange are connected as a whole through stud bolts.

[0008] Furthermore, the hook ring is a detachable split ring, which clamps the floating tube sheet, the floating head flange and the floating tube sheet are sealed by gasket 2, and the floating head cover and the floating head flange are connected by welding.

[0009] Furthermore, the floating head cover and the outer head cover are both provided with lifting ears, and the function of the lifting ears is to facilitate cleaning and maintenance.

[0010] Furthermore, the bellows of the expansion joint is a single-layer bellows.

[0011] Furthermore, it also includes a head flange 2, which is inserted and welded on the outer head cover head. The head flange 1 is connected to the head flange 2 by bolts. The head flange 2 is inserted and welded on the elliptical outer head cover head to achieve the purpose of connecting with the process port and meet the disassembly requirements.

[0012] Furthermore, a gasket 1 is provided between the head flange 1 and the head flange 2.

[0013] Furthermore, the gasket 1 is a full-plane toothed gasket, which can effectively reduce the flange size.

[0014] Furthermore, the second gasket is a toothed gasket.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The floating head end of the utility model adopts an elliptical head and a flange is inserted and welded to achieve the purpose of connecting with the process port and meet the disassembly requirements.

[0017] 2. The use of full-plane gaskets can effectively reduce flange size.

[0018] 3. One end of the expansion joint is connected to the floating head cover, and the other end is connected to the head flange, which can compensate for the displacement caused by temperature difference.

[0019] 4. When repairing the utility model, first unscrew the bolts on the flange at the head, then unscrew the bolts on the flange of the outer head cover, remove the outer head cover, and the floating head end can be exposed for repair.

[0020] In summary, the utility model has a simple structure, is easy to disassemble and maintain, has a small number of light forgings, a low manufacturing cost, is easy to install, has easy gasket acquisition and replacement, and meets the functional requirements under the premise of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the assembly structure of the expansion joint of the utility model;

[0023] In the figure: 1 shell, 2 outer head cover, 21 outer head cover flange, 22 shell flange, 3 floating tube sheet, 31 hook ring, 32 floating head flange, 33 lifting ear, 4 expansion joint, 41 bellows, 42 connecting piece, 5 head flange one, 6 floating head cover, 7 outer head cover head, 8 head flange two, 9 gasket one, 10 gasket two. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] For example, see Figures 1 to 2 The utility model provides a technical solution: a detachable single-tube floating head heat exchanger, comprising a tube box, a shell 1, an outer head cover 2, a floating head cover 6, and an outer head cover head 7. The two ends of the shell 1 are respectively connected to the tube box and the outer head cover 2. A floating tube sheet 3 is provided between the shell 1 and the outer head cover 2. An expansion joint 4 and a head flange 5 are provided between the floating head cover 6 and the outer head cover head 7. One end of the expansion joint 4 is connected to the floating head cover 6, and the other end is connected to the head flange 5.

[0026] Furthermore, a connecting piece 42 is provided between the expansion joint 4 and the floating head cover 6 .

[0027] Furthermore, it also includes an outer cover flange 21 and a shell flange 22, and the outer cover flange 21 and the shell flange 22 are connected by stud bolts.

[0028] Furthermore, a hook ring 31 and a floating head flange 32 are respectively provided on both sides of the floating tube sheet 3, and the hook ring 31 and the floating head flange 32 are connected as a whole through stud bolts.

[0029] Furthermore, the hook ring 31 is a detachable split ring, which clamps the floating tube sheet 3, the floating head flange 32 and the floating tube sheet 3 are sealed by a gasket 10, and the floating head cover 6 and the floating head flange 32 are connected by welding.

[0030] Furthermore, the floating head cover 6 and the outer head cover 7 are both provided with lifting ears 33, and the function of the lifting ears 33 is to facilitate cleaning and maintenance.

[0031] Furthermore, the bellows 41 of the expansion joint 4 is a single-layer bellows.

[0032] Furthermore, it also includes a head flange 2 8, which is inserted and welded on the outer head cover 7. The head flange 1 5 is connected to the head flange 2 8 by bolts. The head flange 2 8 is inserted and welded on the elliptical outer head cover 7 to achieve the purpose of connecting with the process port and meet the disassembly requirements.

[0033] Furthermore, a gasket 9 is provided between the head flange 1 5 and the head flange 2 8 .

[0034] Furthermore, the gasket 9 is a full-plane toothed gasket, which can effectively reduce the flange size.

[0035] Furthermore, the gasket 2 10 is a toothed gasket.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable single-pass floating head heat exchanger, characterized in that: The invention comprises a pipe box, a shell (1), an outer head cover (2), a floating head cover (6), and an outer head cover end cap (7); the two ends of the shell (1) are respectively connected to the pipe box and the outer head cover (2); a floating tube sheet (3) is provided between the shell (1) and the outer head cover (2); an expansion joint (4) and an end cap flange (5) are provided between the floating head cover (6) and the outer head cover end cap (7); one end of the expansion joint (4) is connected to the floating head cover (6), and the other end is connected to the end cap flange (5).

2. A detachable single-pass floating head heat exchanger according to claim 1, characterized in that: It also comprises an outer cover flange (21) and a shell flange (22), wherein the outer cover flange (21) and the shell flange (22) are connected by stud bolts.

3. The detachable single-pass floating head heat exchanger according to claim 1, characterized in that: A hook ring (31) and a floating head flange (32) are respectively arranged on both sides of the floating tube sheet (3), and the hook ring (31) and the floating head flange (32) are connected as a whole via stud bolts.

4. A detachable single-pass floating head heat exchanger according to claim 3, characterized in that: The hook ring (31) is a detachable split ring that clamps the floating tube sheet (3); the floating head flange (32) and the floating tube sheet (3) are sealed via a second gasket (10); and the floating head cover (6) and the floating head flange (32) are connected via welding.

5. The detachable single-pass floating head heat exchanger according to claim 3, characterized in that: The floating head cover (6) and the outer head cover sealing head (7) are both provided with lifting ears (33).

6. The detachable single-pass floating head heat exchanger according to claim 1, characterized in that: The bellows of the expansion joint (4) is a single-layer bellows (41).

7. The detachable single-pass floating head heat exchanger according to claim 1, characterized in that: It also includes a second head flange (8), wherein the second head flange (8) is inserted and welded on the outer head cover (7), and the first head flange (5) is connected to the second head flange (8) by bolts.

8. The detachable single-pass floating head heat exchanger according to claim 7, characterized in that: A gasket 1 (9) is provided between the head flange 1 (5) and the head flange 2 (8).

9. The detachable single-pass floating head heat exchanger according to claim 8, characterized in that: Gasket 1 (9) is a full-plane toothed gasket.

10. The detachable single-pass floating head heat exchanger according to claim 4, characterized in that: The second gasket (10) is a toothed gasket.

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