Stuffing box heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a stuffing box heat exchanger. Comprising a tube box, a shell pass cylinder, an outer head cover and a tube bundle, one end of the shell pass cylinder is detachably connected with the tube box through a tube box side flange, and the other end of the shell pass cylinder is detachably connected with the outer head cover through an outer head cover side flange; the fixed end of the tube bundle is fixed at one end of the shell pass cylinder, and the floating end of the tube bundle adopts a stuffing box structure; a groove is formed in the inner side of the outer head cover side flange, the filler is placed in the groove and pressed and fixed through the filler gland, and the filler seals the floating end of the tube bundle. The manufacturing cost is low, the tube bundle can be detached, overhauling and cleaning are easy, and media do not leak outwards.

Description

Technical Field

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

[0002] Fixed tube sheet heat exchanger is a commonly used shell and tube heat exchanger, mainly composed of shell, tube sheet, tube bundle, tube box and other components. The tube sheets at both ends of the fixed tube sheet heat exchanger are connected and fixed to the shell by welding. The heat exchange tube can be a plain tube or a low-fin tube. It has a simple structure, saves materials, has low manufacturing cost, can obtain a smaller shell inner diameter, the tube side can be divided into various types, and the shell side can also be divided into multiple passes by longitudinal partitions. It has a wide range of specifications, so it is widely used in engineering.

[0003] However, the shell side of the existing fixed tube sheet heat exchanger cannot be disassembled for cleaning, which limits its use in some working conditions. The advantage of the floating head heat exchanger is that it is easy to clean between and inside the tubes and does not produce thermal stress; but its structure is complex and its cost is higher than that of the fixed tube sheet heat exchanger. Although the existing stuffing box heat exchanger has a simple structure, is easy to manufacture, and is easy to repair and clean; however, the shell side fluid may leak out, so the use pressure and temperature are limited. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a stuffing box heat exchanger, which has low cost, can disassemble the tube bundle, is easy to inspect and clean, and does not leak the medium to the outside.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A stuffing box heat exchanger comprises a tube box, a shell-side cylinder, an outer head cover and a tube bundle; one end of the shell-side cylinder is detachably connected to the tube box through a tube box side flange, and the other end is detachably connected to the outer head cover through an outer head cover side flange; the fixed end of the tube bundle is fixed to one end of the shell-side cylinder, and the floating end of the tube bundle adopts a stuffing box structure; the inner side of the outer head cover side flange is grooved, and the stuffing is placed in the groove and is fixed by a stuffing gland, and the stuffing seals the floating end of the tube bundle.

[0007] Furthermore, one end of the packing gland is a flange, and the other end is a cylinder.

[0008] Furthermore, a threaded hole is provided on the end face of the outer head cover side flange, and a corresponding bolt hole is provided on the flange at one end of the packing gland, and the packing gland is fixedly connected to the outer head cover side flange by studs and nuts.

[0009] Furthermore, the inner diameter of the cylinder of the packing gland is consistent with the inner diameter of the flange on the outer head cover side, and the outer diameter is consistent with the diameter of the groove on the inner side of the flange on the outer head cover side, and the cylinder of the packing gland is used to compress the packing.

[0010] Furthermore, the outer diameter of the floating tube sheet at the floating end of the tube bundle is smaller than the inner diameter of the outer head cover flange, the top surface of the floating tube sheet is lower than the top surface of the outer head cover flange, and the top surface of the floating tube sheet is higher than the top surface of the packing.

[0011] Compared with the prior art, the utility model has at least the following technical effects or advantages:

[0012] 1. The tube bundle of the utility model adopts the conventional floating head heat exchanger tube bundle, and the floating end adopts a stuffing box structure, so the tube bundle can be disassembled to achieve shell side cleaning.

[0013] 2. The tube bundle and outer head cover of the utility model adopt the conventional floating head heat exchanger tube bundle, which has low cost.

[0014] 3. The tube bundle of the utility model is sealed by a stuffing box and the tube bundle is expandable.

[0015] 4. The utility model is easy to install. The packing is compressed by the packing gland, so the medium does not leak to the outside, and the packing gland does not affect the arrangement of the heat exchange tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic front view of the structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the structure of the stuffing box of the utility model.

[0018] Figure 3 It is a schematic front view of the flange structure on the outer cover side of the utility model.

[0019] Figure 4 It is a schematic top view of the flange structure on the outer cover side of the utility model.

[0020] Figure 5 It is a schematic front view of the packing gland structure of the utility model.

[0021] Figure 6 It is a schematic top view of the packing gland structure of the utility model.

[0022] In the figure: 1-tube box 21-floating tube sheet 22-heat exchange tube 23-fixed tube sheet 3-shell cylinder 4-support 5-external head cover side flange 6-external head cover 7-stud 8-nut 9-packing gland 10-packing 101-tube side medium inlet 102-shell side medium outlet 103-shell side medium inlet 104-vent 105-threaded hole 106-bolt hole 107-tube side medium outlet DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width" and "

[0025] The directions or positional relationships indicated by terms such as “degree”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial” and “circumferential” are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0027] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the description of the utility model, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0031] [Example]

[0032] like Figure 1-6 As shown, a stuffing box heat exchanger includes a tube box 1, a tube bundle, a shell-side cylinder 3, a support 4 and an outer head cover 6.

[0033] The ends of the pipe box 1 and the outer head cover 6 are both provided with flanges, and the shell side cylinder 3 is a vertically arranged circular cylinder, with a pipe box side flange at the bottom and an outer head cover side flange 5 at the top. The bottom end of the shell side cylinder 3 is bolted to the pipe box 1 through the pipe box side flange, and the top end is bolted to the outer head cover 6 through the outer head cover side flange 5.

[0034] The bottom of the tube box 1 is provided with a vent 104, and the side wall is provided with a tube-side medium inlet 101. The lower side wall of the shell-side cylinder 3 is provided with a shell-side medium outlet 102, and the upper side wall is provided with a shell-side medium inlet 103. The support 4 is fixed to the outer wall of the shell-side cylinder 3. The top of the outer head cover 6 is provided with a tube-side medium outlet 107.

[0035] The tube bundle includes a floating tube sheet 21, a heat exchange tube 22 and a fixed tube sheet 23. The bottom end of the heat exchange tube 22 is fixed to the fixed tube sheet 23, and the top end is fixed to the floating tube sheet 21. The fixed tube sheet 23 is fixed to the bottom end of the shell side cylinder 3, and the floating tube sheet 21 adopts a stuffing box structure.

[0036] A circular groove is opened inside the outer head cover side flange 5, and a packing 10 is placed in the circular groove and is compressed and fixed by a packing gland 9. The packing 10 seals the floating end of the tube bundle.

[0037] The packing gland 9 has a flange at one end and a cylinder at the other end. The top end surface of the outer cover side flange 5 is provided with a threaded hole 105, and the flange at one end of the packing gland 9 is provided with a corresponding bolt hole 106. The packing gland 9 is fixedly connected to the outer cover side flange 5 through studs 7 and nuts 8.

[0038] like Figure 2 As shown, the inner diameter of the cylinder of the packing gland 9 is consistent with the inner diameter of the outer head cover side flange 5, the outer diameter of the cylinder of the packing gland 9 is consistent with the inner groove diameter of the outer head cover side flange 5, and the cylinder end of the packing gland 9 is used to press the packing 10. The outer diameter of the floating tube sheet 21 at the floating end of the tube bundle is smaller than the inner diameter of the outer head cover side flange 5, the top surface of the floating tube sheet 21 is lower than the top surface of the outer head cover side flange 5, and the top surface of the floating tube sheet 21 is as high as the top surface of the packing 10.

[0039] In this embodiment, the pipe box 1, the tube bundle, the shell side cylinder 3, and the support 4 are designed and manufactured according to conventional standards. The tube bundle is installed after passing the pressure test. After the tube bundle is installed, the packing 10 is installed, and the packing gland 9 is pressed on the packing 10, and the studs 7 and nuts 8 are used to tighten. After the shell side pressure test is passed, the outer head cover 6 is installed, and the tube side pressure test is passed. After passing the pressure test, it is put into use.

[0040] The utility model has low cost, can disassemble the tube bundle, and is easy to inspect and clean. The tube bundle is sealed by a stuffing box, and the tube bundle can expand. The utility model is easy to install, and the packing 10 is compressed by the packing gland 9, so that the medium does not leak to the outside, and the packing gland 9 does not affect the arrangement of the heat exchange tube 22.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stuffing box heat exchanger, characterized in that: It includes tube box, shell cylinder, outer cover and tube bundle; One end of the shell-side cylinder is detachably connected to the pipe box through a pipe box side flange, and the other end is detachably connected to the outer head cover through an outer head cover side flange; The fixed end of the tube bundle is fixed to one end of the shell-side cylinder, and the floating end of the tube bundle adopts a stuffing box structure; The inner side of the outer head cover side flange is grooved, and the filler is placed in the groove and is compressed and fixed by a filler gland, and the filler seals the floating end of the tube bundle.

2. A stuffing box heat exchanger according to claim 1, characterized in that: One end of the packing gland is a flange, and the other end is a cylinder.

3. A stuffing box heat exchanger according to claim 2, characterized in that: The end face of the outer head cover side flange is provided with a threaded hole, and the flange at one end of the packing gland is provided with a corresponding bolt hole, and the packing gland is fixedly connected to the outer head cover side flange through studs and nuts.

4. A stuffing box heat exchanger according to claim 2, characterized in that: The inner diameter of the cylinder of the packing gland is consistent with the inner diameter of the flange on the outer head cover, and the outer diameter is consistent with the diameter of the groove on the inner side of the flange on the outer head cover. The cylinder of the packing gland is used to compress the packing.

5. A stuffing box heat exchanger according to claim 1, characterized in that: The outer diameter of the floating tube sheet at the floating end of the tube bundle is smaller than the inner diameter of the outer head cover side flange, the top surface of the floating tube sheet is lower than the top surface of the outer head cover side flange, and the top surface of the floating tube sheet is higher than the top surface of the packing.

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