CN217131923U - U-shaped pipe heat exchanger suitable for large temperature difference condition - Google Patents
U-shaped pipe heat exchanger suitable for large temperature difference condition Download PDFInfo
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- CN217131923U CN217131923U CN202220401703.5U CN202220401703U CN217131923U CN 217131923 U CN217131923 U CN 217131923U CN 202220401703 U CN202220401703 U CN 202220401703U CN 217131923 U CN217131923 U CN 217131923U
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- 238000001816 cooling Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 14
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model provides a U-shaped pipe heat exchanger suitable for big difference in temperature condition, including pipe case, casing and tube sheet, pass through between pipe case and the casing the tube sheet is connected, the tube sheet comprises flexible thin tube sheet and thick tube sheet, flexible thin tube sheet and thick tube sheet form cooling channel, the beneficial effects of the utility model are that: the tube plate adopts a double-layer structure consisting of a flexible thin tube plate and a thick tube plate, the flexible thin tube plate can reduce temperature difference stress through self deformation, a tube hole in the flexible thin tube plate is connected with the inlet end of the U-shaped tube, a tube hole in an outer circular ring of the thick tube plate is connected with the outlet end of the U-shaped tube, the expansion degree of freedom of a high-temperature area of the tube plate is better, and the temperature difference stress of the tube plate can be further reduced.
Description
Technical Field
The utility model relates to a heat exchanger technical field especially relates to a U-shaped pipe heat exchanger suitable for big difference in temperature condition.
Background
The U-shaped tube heat exchanger is a heat exchanger with multiple tube passes, only one tube plate is arranged, and the U-shaped tube heat exchanger is widely applied to heat exchange devices in various industries due to the characteristics of compact structure, free expansion of tube bundles, convenience in installation and maintenance and the like. The hairpin type heat exchanger can solve the problem of large temperature difference of the inlet and the outlet of a tube pass, but cannot meet the conditions of limited equipment space and compact required structure, and the flexible tube plate can bear higher temperature integrally but is not suitable for being used as the tube plate of a U-shaped tube heat exchanger integrally.
The temperature difference between the tube pass medium inlet and the tube pass medium outlet of a conventional U-shaped tube heat exchanger adopting the tube arrangement in an up-down or left-right partition mode cannot exceed 80 ℃; the U-shaped tube heat exchanger adopting the fountain type pipe arrangement with the inner ring and the outer ring or the pipe arrangement with the inlet and the outlet crossed can bear larger temperature difference of the inlet and the outlet of tube side media, but the temperature difference generally does not exceed 120 ℃ from the application condition. In some occasions, the temperature difference between an inlet and an outlet of a tube side medium is required to exceed 150 ℃, and the safety of the structure cannot be ensured by the conventional structure.
SUMMERY OF THE UTILITY MODEL
For overcoming the above-mentioned problem that exists among the prior art, the utility model provides a U-shaped pipe heat exchanger suitable for big difference in temperature condition.
The utility model discloses a U-shaped pipe heat exchanger suitable for big difference in temperature condition, including pipe case, casing and tube sheet, pass through between pipe case and the casing the tube sheet is connected, the tube sheet comprises flexible thin tube sheet and thick tube sheet, flexible thin tube sheet and thick tube sheet form cooling channel, cool down to the tube sheet.
On the basis, the tube box comprises an inner tube box and an outer tube box, a separated structure of the inner tube box and the outer tube box is adopted, a tube pass outlet medium in the outer tube box can play a cooling protection role for the inner tube box, the inner tube box comprises tube sections and cones, the cones are arranged between the adjacent tube sections, expansion joints and flanges are arranged on the tube sections, a heat medium which just enters the heat exchanger is arranged in the inner tube box, and the inner tube box expands due to high temperature; the heat medium that is through the heat transfer cooling in the outer tube case, the temperature is low relatively, therefore the outer tube case inflation is little to formed the displacement difference, absorbed the displacement difference by the extension or the compression of expansion joint, the outer tube case includes head and barrel, set up tube side import takeover, tube side export takeover, tube sheet cooling tube and manhole on the barrel, tube side import takeover with the inner tube case is connected.
On the basis, one end of the tube plate cooling tube extends to the outside of the cylinder, the other end of the tube plate cooling tube extends into the channel, and a tube plate cooling medium is introduced through the tube plate cooling tube.
On the basis, the shell is used for containing a cold medium and the tube bundle, a U-shaped tube and a baffle plate are installed in the shell, the U-shaped tube penetrates through the baffle plate, two ends of the U-shaped tube are connected with the tube plate, and the shell is provided with a shell side inlet connecting tube and a shell side outlet connecting tube for the inflow and outflow of the cooling medium.
On the basis, a first pipe hole is formed in the circular flat plate of the flexible thin tube plate, second pipe holes are formed in the inner ring and the outer ring of the thick tube plate respectively, and circular arc plates are arranged on the periphery of the flexible thin tube plate and play a role in absorbing thermal expansion.
On the basis, the second pipe holes of the inner ring correspond to the first pipe holes one to one, and the inlet end of the U-shaped pipe provides a pipe penetrating channel.
On the basis, the first pipe hole is connected with the inlet end of the U-shaped pipe, the second pipe hole of the outer ring of the thick pipe plate is connected with the outlet end of the U-shaped pipe, the second pipe hole of the inner ring of the thick pipe plate provides a pipe penetrating channel for the inlet end of the U-shaped pipe, and the expansion of the inner ring is uniformly limited in the circumferential direction of the outer ring, so that the temperature difference bearing capacity of the pipe plate is improved.
On the basis, the U-shaped pipes are arranged in a fountain mode, are not limited to the existing regular arrangement mode, and can be arranged according to requirements.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a U-shaped pipe heat exchanger suitable for big difference in temperature condition, the tube sheet adopts the bilayer structure that flexible thin tube sheet and thick tube sheet constitute, flexible thin tube sheet can reduce the difference in temperature stress through self deformation, the entrance point of U-shaped pipe is connected to the tube hole on the flexible thin tube sheet, the U-shaped pipe exit end is connected to the tube hole of outer ring of thick tube sheet, the better inflation degree of freedom of tube sheet high temperature region, can further reduce the difference in temperature stress of tube sheet, the tube hole of thick tube sheet inner circle provides the poling passageway for the entrance point of U-shaped pipe, the expansion of outer lane circumference restriction inner circle, it is relatively even to make the whole circle of tube sheet be heated, the difference in temperature stress of production is less, thereby improve the ability that the tube sheet bore the difference in temperature.
(2) The utility model discloses a U-shaped pipe heat exchanger suitable for big difference in temperature condition, interior pipe case, outer pipe box disconnect-type structure, the tube side export medium in the outer pipe case can play the cooling guard action to interior pipe case, utilize the cavity that forms between flexible thin tube sheet and the thick tube sheet, lead to tube sheet coolant through the tube sheet cooling tube, coolant is by in the clearance entering casing between heat exchange tube and the thick tube sheet tube hole, with the same outflow of coolant in the casing, still can guarantee the safety of structure when the difference in temperature surpasses 150 ℃ in tube side medium import and export, the structure is simple relatively simultaneously, compact, can save manufacturing cost and occupation of land space, and convenient to overhaul.
Drawings
FIG. 1 is a schematic cross-sectional view of a U-shaped tube heat exchanger according to the present invention;
FIG. 2 is a schematic cross-sectional view of the outer tube box of the U-shaped tube heat exchanger according to the present invention;
FIG. 3 is a schematic view of the sectional structure of the inner tube box of the U-shaped tube heat exchanger of the present invention;
FIG. 4 is a schematic structural view of a tube sheet of a U-shaped tube heat exchanger according to the present invention;
FIG. 5 is a schematic view of the cross-sectional structure of the tube sheet of the U-shaped tube heat exchanger of the present invention;
in the figure: 1. the tube side cooling device comprises a tube side inlet connecting tube, 2, an inner tube box, 2-1, an expansion joint, 2-2 flanges, 2-3, a cylinder section, 2-4, a cone, 3, a tube plate, 3-1, a flexible thin tube plate, 3-2, a thick tube plate, 3-3, a first tube hole, 3-4, a second tube hole, 3-5, an arc plate, 4, a U-shaped tube, 5, a baffle plate, 6, an outer tube box, 6-1, a seal head, 6-2, a cylinder, 6-3, a manhole, 7, a tube side outlet connecting tube, 8, a tube plate cooling tube, 9, a shell, 10, a shell side inlet connecting tube, 11 and a shell side outlet connecting tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model discloses a U-shaped pipe heat exchanger suitable for big difference in temperature condition refers to fig. 1, including pipe case, casing 9 and tube sheet 3, pass through between pipe case and the casing 9 tube sheet 3 is connected, tube sheet 3 includes and comprises flexible thin tube sheet 3-1 and thick tube sheet 3-2, flexible thin tube sheet 3-1 and thick tube sheet 3-2 form cooling channel, cool down to tube sheet 3.
Referring to fig. 2 and 3, as a preferred embodiment of the present invention, in this embodiment, the tube box includes an inner tube box 2 and an outer tube box 6, and a structure in which the inner tube box and the outer tube box 6 are separated is adopted, a tube pass outlet medium in the outer tube box 6 can play a cooling protection role for the inner tube box 2, the inner tube box 2 is composed of a cylinder section 2-2 and a cone 2-5, the cone 2-5 is installed between adjacent cylinder sections 2-2, an expansion section 2-1 and a flange 2-2 are installed on the cylinder section 2-2, a heat medium which has just entered into the heat exchanger is in the inner tube box 2, and at this time, the temperature is high, which causes the inner tube box 2 to expand; the heat medium subjected to heat exchange and temperature reduction is arranged in the outer tube box 6, the temperature is relatively low, so that the outer tube box 6 expands slightly to form displacement difference, the displacement difference is absorbed by the extension or compression of the expansion joint 2-1, the outer tube box 6 comprises an end socket 6-1 and a cylinder body 6-2, the cylinder body 6-2 is provided with a tube side inlet connecting tube 1, a tube side outlet connecting tube 7, a tube plate cooling tube 8 and a manhole 6-3, and the tube side inlet connecting tube 1 is connected with the inner tube box 2.
Referring to fig. 1, in this embodiment, as a preferred embodiment of the present invention, one end of the tube plate cooling tube 8 extends to the outside of the cylinder 6-2, and the other end extends into the channel, and a tube plate cooling medium is introduced through the tube plate cooling tube 8.
As a preferred embodiment of the present invention, in this embodiment, the shell 9 is used for accommodating the cooling medium and the tube bundle, the U-shaped tube 4 and the baffle plate 5 are installed in the shell 9, the U-shaped tube 4 passes through the baffle plate 5 and both ends are connected to the tube plate 3, the shell 9 is provided with the shell side inlet connecting tube 10 and the shell side outlet connecting tube 11 for flowing in and out of the cooling medium.
Referring to fig. 4 and 5, as a preferred embodiment of the present invention, in this embodiment, a first pipe hole 3-3 is formed in a circular plate of the flexible thin tube plate 3-1, second pipe holes 3-4 are respectively formed in an inner ring and an outer ring of the thick tube plate 3-2, a circular arc plate 3-5 is disposed around the flexible thin tube plate 3-1, and the circular arc plate 3-5 plays a role in absorbing thermal expansion.
As a preferred embodiment of the present invention, in this embodiment, the second tube holes 3-4 of the inner ring correspond to the first tube holes 3-3 one by one, and provide a tube passing channel for the inlet end of the U-shaped tube 4.
As a preferred embodiment of the present invention, in this embodiment, the first tube hole 3-3 is connected to the inlet end of the U-shaped tube 4, the second tube hole 3-4 of the outer ring of the thick tube plate 3-2 is connected to the outlet end of the U-shaped tube 4, the second tube hole 3-4 of the inner ring of the thick tube plate 3-2 provides a tube passing channel for the inlet end of the U-shaped tube 4, and the expansion of the inner ring is uniformly limited in the circumferential direction of the outer ring, so as to improve the temperature difference bearing capacity of the tube plate 3.
As a preferred embodiment of the present invention, in the present embodiment, the U-shaped pipe 4 is arranged in a fountain type.
The utility model discloses a theory of operation is: in the practical use process, the tube side inlet connecting tube 1 is used for introducing a heat medium, the tube side inlet connecting tube 1 is arranged on the outer tube box 6, the heat medium enters the inner tube box 2 from the tube side inlet connecting tube 1, the inner tube box 2 is arranged in the outer tube box 6, a structure with the inner tube box and the outer tube box 6 separated is adopted, a space for collecting the tube side outlet medium is formed between the outer tube box 6 and the inner tube box 2, the inner tube box 2 is cooled, the outer tube box 6 comprises an end socket 6-1 and a tube body 6-2, the tube side inlet connecting tube 1, the tube side outlet connecting tube 7, the tube plate cooling tube 8 and a manhole 6-3 are arranged on the tube body 6-2, the manhole 6-3 is used for entering and exiting during internal maintenance, the tube side outlet connecting tube 7 is used for leading out the heat medium, the inner tube box 2 is composed of tube sections 2-3 and cones 2-4, the cones 2-4 are arranged between two adjacent tube sections 2-3, an expansion joint 2-1 and a flange 2-2 are arranged on the cylindrical section 2-3, the flange 2-2 is used for dismounting during internal maintenance, the expansion joint 2-1 is used for absorbing expansion displacement difference generated by the inner tube box 2 and the outer tube box 6 due to different temperatures, a heat medium which just enters the heat exchanger is in the inner tube box 2, and the inner tube box 2 is expanded due to high temperature; the heat medium which is subjected to heat exchange and temperature reduction is arranged in the outer tube box 6, the temperature is relatively low, so that the outer tube box 6 is small in expansion, and displacement difference is formed and absorbed by the extension or compression of the expansion joint 2-1.
An inner tube box 2 is connected with a tube side inlet connecting tube 1 and a tube plate 3 to separate the inlet and outlet channels of a heat medium, a shell 9 is used for containing a cold medium and a tube bundle, a shell side inlet connecting tube 10 and a shell side outlet connecting tube 11 are arranged on the shell 9, a flow space of the shell side medium is formed between the shell 8 and a U-shaped tube 4, the shell side inlet connecting tube 10 is used for introducing the cold medium, the shell side outlet connecting tube 11 is used for leading out the cold medium, a U-shaped tube 4 and a baffle plate 5 are arranged in the shell 9, the U-shaped tube 4 is used for realizing heat exchange of the cold medium and the heat medium, the baffle plate 5 is used for baffling the shell side medium and supporting the U-shaped tube 4, the U-shaped tube 4 passes through the baffle plate 5, two ends of the U-shaped tube 4 are connected with the tube plate 3, the tube box and the shell 9 are connected through the tube plate 3, the heat medium enters the inner tube box 2 from the tube side inlet connecting tube 1 and is uniformly distributed into the U-shaped tube 4, the cold medium enters the shell 9 from the shell side inlet 10 and is baffled through the baffle plate 5, after the heat medium transfers heat to the cold medium through the U-shaped tube 4, the heat medium is collected in the outer tube box 6 and flows out from the tube-side outlet connecting tube 7, and the cold medium flows out from the shell-side outlet connecting tube 11.
Because the temperature distribution of the tube plate of the existing U-shaped tube heat exchanger is uneven, the temperature difference born by the tube plate is small, the tube plate 3 comprises a flexible thin tube plate 3-1 and a thick tube plate 3-2, the circumference of the flexible thin tube plate 3-1 is provided with an arc plate 3-5, the arc plate 3-5 plays a role of absorbing thermal expansion, the tube hole of the flexible thin tube plate 3-1 is connected with the inlet end of the U-shaped tube 4, the tube hole of the outer circular ring of the thick tube plate 3-2 is connected with the outlet end of the U-shaped tube 4, the tube hole of the outer circular ring of the thick tube plate 3-2 is corresponding to the tube hole of the flexible thin tube plate 3-1, the tube hole of the inner circular ring of the thick tube plate 3-2 provides a tube penetrating channel for the inlet end of the U-shaped tube 4, the U-shaped tube 4 adopts a fountain type arrangement, the inlet high temperature end is evenly distributed on the flexible thin tube plate 3-1 of the inner circular ring, the outlet low temperature end is evenly distributed on the outer circular ring of the thick tube plate 3-2, the expansion of the inner ring is uniformly limited in the circumferential direction of the outer ring, so that the temperature difference bearing capacity of the tube plate 3 is improved. A first pipe hole 3-3 is formed in a circular flat plate of the flexible thin pipe plate 3-1, a second pipe hole 3-4 is formed in an inner ring and an outer ring of the thick pipe plate 3-2 respectively, a pipe plate cooling medium is introduced into the pipe plate cooling pipe 8, the pipe plate cooling medium cools the pipe plate 3 in a gap between the flexible thin pipe plate 3-1 and the thick pipe plate 3-2, then the pipe plate cooling medium flows into the shell 9, and an independent cavity formed between the flexible thin pipe plate 3-1 and the thick pipe plate 3-2 is used for introducing the pipe plate cooling medium. The tube plate cooling medium enters the shell 9 from a gap between the U-shaped tube 4 and the second tube hole 3-4 of the inner ring, and flows out of the shell pass outlet connecting tube 11 together with the shell pass cooling medium, so that the tube plate 3 is further cooled and protected, and the structure can meet the condition that the temperature difference between an inlet and an outlet of the tube pass medium exceeds 150 ℃.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounting," "disposing," "connecting," "fixing," "screwing," "padding," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. A U-shaped pipe heat exchanger suitable for large temperature difference conditions comprises a pipe box, a shell (9) and a pipe plate (3), and is characterized in that: the tube box is connected with the shell (9) through the tube plate (3), the tube plate (3) is composed of a flexible thin tube plate (3-1) and a thick tube plate (3-2), and a cooling channel is formed between the flexible thin tube plate (3-1) and the thick tube plate (3-2).
2. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 1 wherein: the tube box comprises an inner tube box (2) and an outer tube box (6), wherein the inner tube box (2) is composed of tube sections (2-3) and cones (2-4), the cones (2-4) are installed between the adjacent tube sections (2-3), expansion joints (2-1) and flanges (2-2) are installed on the tube sections (2-3), the outer tube box (6) comprises a sealing head (6-1) and a tube body (6-2), a tube side inlet connecting tube (1), a tube side outlet connecting tube (7), a tube plate cooling tube (8) and a manhole (6-3) are arranged on the tube body (6-2), and the tube side inlet connecting tube (1) is connected with the inner tube box (2).
3. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 2 wherein: one end of the tube plate cooling tube (8) extends to the outside of the cylinder (6-2), and the other end of the tube plate cooling tube extends into the channel.
4. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 3 wherein: the shell (9) is internally provided with a U-shaped pipe (4) and a baffle plate (5), the U-shaped pipe (4) penetrates through the baffle plate (5) and two ends of the U-shaped pipe are connected with the pipe plate (3), and the shell (9) is provided with a shell side inlet connecting pipe (10) and a shell side outlet connecting pipe (11).
5. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 4 wherein: the flexible thin tube plate (3-1) is internally provided with a first tube hole (3-3), the inner ring and the outer ring of the thick tube plate (3-2) are respectively provided with a second tube hole (3-4), and the periphery of the flexible thin tube plate (3-1) is provided with an arc plate (3-5).
6. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 5 wherein: the second pipe holes (3-4) of the outer ring correspond to the first pipe holes (3-3) one by one.
7. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 6 wherein: the first pipe hole (3-3) is connected with the inlet end of the U-shaped pipe (4), the second pipe hole (3-4) of the outer circular ring of the thick pipe plate (3-2) is connected with the outlet end of the U-shaped pipe (4), and the second pipe hole (3-4) of the inner circular ring of the thick pipe plate (3-2) provides a pipe penetrating channel for the inlet end of the U-shaped pipe (4).
8. A U-tube heat exchanger adapted for large temperature differential conditions according to claim 7 wherein: the U-shaped pipe (4) is arranged in a fountain manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220401703.5U CN217131923U (en) | 2022-02-25 | 2022-02-25 | U-shaped pipe heat exchanger suitable for large temperature difference condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220401703.5U CN217131923U (en) | 2022-02-25 | 2022-02-25 | U-shaped pipe heat exchanger suitable for large temperature difference condition |
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| CN217131923U true CN217131923U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220401703.5U Active CN217131923U (en) | 2022-02-25 | 2022-02-25 | U-shaped pipe heat exchanger suitable for large temperature difference condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413655A (en) * | 2022-02-25 | 2022-04-29 | 上海锅炉厂有限公司 | U-shaped pipe heat exchanger suitable for large temperature difference condition |
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- 2022-02-25 CN CN202220401703.5U patent/CN217131923U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413655A (en) * | 2022-02-25 | 2022-04-29 | 上海锅炉厂有限公司 | U-shaped pipe heat exchanger suitable for large temperature difference condition |
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