CN215810337U - Heat exchange assembly and shell-and-tube heat exchanger - Google Patents
Heat exchange assembly and shell-and-tube heat exchanger Download PDFInfo
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- CN215810337U CN215810337U CN202122187275.9U CN202122187275U CN215810337U CN 215810337 U CN215810337 U CN 215810337U CN 202122187275 U CN202122187275 U CN 202122187275U CN 215810337 U CN215810337 U CN 215810337U
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Abstract
The utility model relates to the technical field of heat exchangers, in particular to a heat exchange assembly and a shell-and-tube heat exchanger. The heat exchange assembly comprises an inner tube shell and a fin tube; the inner tube shell is provided with a tube hole, the finned tube is inserted in the tube hole and extends into the inner tube shell, and the axis of the finned tube is vertical to the axis of the inner tube shell; the finned tube is fixedly connected with the inner tube shell, and the joint of the finned tube and the inner tube shell is in sealing connection. The axes of the finned tube and the inner tube shell are vertical to each other, so that the heat exchange media in the finned tube and the inner tube shell are in a crossed state, the heat exchange efficiency is higher than that of the existing heat exchanger, the size of the heat exchanger can be reduced by adopting the finned tube type heat exchange assembly, and the material and manufacturing cost are saved. Because of the improvement of heat exchange efficiency, under the same heat exchange intensity, the finned tube heat exchange assembly needs fewer finned tubes, reduces the number of welding joints or expansion joints, is simple and convenient to manufacture, has shorter length, is easy to manufacture and adopts automatic equipment, and ensures the quality more easily.
Description
Technical Field
The utility model relates to the technical field of heat exchangers, in particular to a heat exchange assembly and a shell-and-tube heat exchanger.
Background
The shell-and-tube heat exchanger is an important heat exchanger product frequently used in the chemical industry. The heat exchanger is generally composed of parts and components such as a left tube box, a tube shell, a tube bundle assembly, a heat exchange tube, a saddle support, a right tube box, a tube connecting seat and the like, and all the parts are connected together by welding and bolt connection methods, as shown in fig. 1 and fig. 2. The tube shell and the tube plate are connected together in a welding mode and are welded on the saddle support. The tube bundle assembly consists of heat exchange tubes, partition boards and connecting bolts and is assembled in the tube shell. The heat exchange tube passes through the tube hole on the tube plate, and the heat exchange tube can be connected with the tube plate by welding or expansion joint. The various pipe connecting seats are respectively welded with the pipe shell, the left pipe box and the right pipe box by a welding method. The left channel box and the right channel box are respectively connected with the tube shell by bolts. When the heat exchanger works, a medium flows out through the pipe socket of the left pipe box, the heat exchange pipe and the pipe socket of the right pipe box. The other medium enters the pipe shell to scour the outside of the heat exchange pipe through the pipe connecting seat on the pipe shell to exchange heat with the medium in the heat exchange pipe, and the other medium flows out through the pipe connecting seat on the pipe shell. (the flow of the medium is only a simple description)
A shell and tube heat exchanger is a product of heat exchangers of conventional design. In order to ensure the heat exchange efficiency, dense heat exchange tubes need to be arranged, and the problems of high manufacturing cost, complex manufacturing procedures and the like exist. The heat exchange tubes are connected with the tube plates by adopting a welding method, so that the number of welding joints is large, and welding defects are easily caused. If the expansion joint method is adopted, the tube expansion technology is not easy to master, and the manufacturing quality is unstable. Because of these problems, new heat exchanger designs are needed to replace conventional heat exchanger design methods.
SUMMERY OF THE UTILITY MODEL
A first object of the present invention is to provide a heat exchange assembly capable of solving the above problems;
a second object of the present invention is to provide a shell and tube heat exchanger comprising a heat exchange assembly as described above.
The utility model provides a heat exchange assembly, which comprises an inner tube shell and a fin tube, wherein the inner tube shell is provided with a plurality of fins;
the finned tube is inserted into the tube hole and extends into the inner tube shell, and the axis of the finned tube is perpendicular to the axis of the inner tube shell;
the finned tube is fixedly connected with the inner tube shell, and the joint of the finned tube and the inner tube shell is in sealing connection.
Preferably, the finned tube is a reducing finned tube, and the outer diameter of the end part of the reducing finned tube is larger than the outer diameters of other positions of the special-shaped finned tube.
Preferably, one end of the finned tube is provided with a flaring;
the flaring and the finned tube are coaxially arranged, and the outer diameter of the flaring is not smaller than that of the finned tube.
Preferably, the transition surface between the flaring and the pipe body is a conical surface or an arc surface.
Preferably, the inner tube shell is provided with upper tube holes and lower tube holes, and the upper tube holes and the lower tube holes are arranged in a one-to-one correspondence manner;
the flaring is sleeved in the upper pipe hole, and the lower end of the finned pipe is sleeved in the lower pipe hole.
Preferably, the flaring and the finned tube are integrally rolled and formed;
or the flaring and the finned tube are of split structures and are welded to form the reducing finned tube.
A shell-and-tube heat exchanger, which comprises the heat exchange assembly, a tube shell, a tube plate, a left box body and a right box body;
the two ends of the tube shell are provided with tube plates, and the left box body and the right box body are respectively connected with one corresponding tube plate; it is also possible for the tube plates to be arranged as double tube plates.
The inner tube shell is arranged in the tube shell, the end part of the inner tube shell extends to the outer side of the tube plate, and the two ends of the inner tube shell are communicated with the left box body and the right box body respectively.
Preferably, one end of the inner tube shell is connected with the corresponding tube plate through a corrugated tube.
Preferably, a baffle is arranged between the tube shell and the inner tube shell.
Preferably, the heat exchange assembly is suitable for manufacturing heat exchangers of different types, specifications and sizes, and the heat exchangers are of horizontal or vertical structures.
Has the advantages that:
the fin is assembled on the inner tube shell, the axes of the fin and the inner tube shell are vertical to each other, so that the heat exchange media in the fin and the inner tube shell are ensured to be in a crossed state, the heat exchange efficiency is higher compared with the existing method for manufacturing a conventional heat exchanger by welding a traditional heat exchange tube on a tube plate, the fin tube type heat exchange assembly can reduce the volume of the heat exchanger, and materials and manufacturing cost are saved. Because the improvement of heat exchange efficiency, under equal heat transfer intensity, traditional shell and tube heat exchanger needs intensive heat exchange tube, and the finned tube that finned tube formula heat exchange assembly needs is less, has reduced the quantity of welded joint or expanded joint, makes portably to the length of finned tube is shorter, makes and easily adopts automation equipment, and the quality is changeed and is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of a prior art shell and tube heat exchanger;
FIG. 2 is a left side view of a prior art shell and tube heat exchanger;
fig. 3 is a schematic internal structural view (front view) of a finned tube heat exchanger according to an embodiment of the present invention;
fig. 4 is a schematic diagram (left side view) of the internal structure of the finned tube heat exchanger according to the embodiment of the present invention;
FIG. 5 is a schematic structural view of a reducing finned tube according to an embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 at "I";
fig. 7 is a schematic structural view illustrating the matching between the reducing finned tube and the inner casing tube according to the embodiment of the present invention;
FIG. 8 is a top view of a finned tube arrangement provided in accordance with an embodiment of the present invention;
fig. 9 is a schematic structural view of the integrated reducing finned tube according to the embodiment of the present invention (a transition surface between the flare and the tube body is an arc surface);
fig. 10 is a schematic structural view of an integrated reducing finned tube according to an embodiment of the present invention (a transition surface between a flare and a tube body is a tapered surface);
fig. 11a and 11b are schematic structural diagrams of a split type reducing finned tube according to an embodiment of the present invention (a transition surface between a flare and a tube body is an arc surface), where the flare and the finned tube in fig. 11a are in a matching state, and the flare and the finned tube in fig. 11b are in a disassembled state;
fig. 12a and 12b are schematic structural diagrams of a split type reducing finned tube according to an embodiment of the present invention (a transition surface between a flare and a tube body is a tapered surface), where the flare and the finned tube are in a fitted state in fig. 12a, and the flare and the finned tube are in an exploded state in fig. 12 b;
FIG. 13 is a flange-type connection between the removable inner shell and the tubesheet for ease of assembly and maintenance of the inner shell, in accordance with an embodiment of the present invention;
fig. 14 is a schematic diagram (front view) of the internal structure of a finned tube heat exchanger (with bellows) according to an embodiment of the present invention;
fig. 15 is a schematic diagram (left side view) of the internal structure of a finned tube heat exchanger (with bellows) according to an embodiment of the present invention.
Description of reference numerals:
1: a left tube box; 2: a tube housing; 3: an inner tube housing; 4: a reducing finned tube; 5: a saddle support; 6: a tube sheet; 7: a right tube box; 8: a pipe connecting seat; 9: a bellows; 10: a blocking plate; 11: a baffle; 12: a bundle assembly; 13: a connecting flange; 14: a finned tube; 15: and (4) flaring.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 3 to 15, the present embodiment provides a heat exchange assembly comprising an inner tube housing 3 and a finned tube 14.
The inner tube shell 3 is provided with a tube hole, the finned tube 14 is inserted in the tube hole and extends into the inner tube shell 3, and the axis of the finned tube 14 is perpendicular to the axis of the inner tube shell 3.
The finned tube 14 is fixedly connected with the inner tube shell 3, and the connection part of the finned tube 14 and the inner tube shell 3 is in sealing connection.
In the embodiment, the fins are assembled on the inner tube shell 3, the axes of the fins and the inner tube shell are vertical to each other, so that the heat exchange media in the fins and the inner tube shell are ensured to be in a crossed state, the heat exchange efficiency is higher compared with the existing method for manufacturing a conventional heat exchanger by welding the traditional heat exchange tubes on the tube plate 6, the heat exchanger volume can be reduced by adopting the fin tube 14 type heat exchange assembly, and the material and the manufacturing cost are saved. Because of the improvement of heat exchange efficiency, under the same heat exchange intensity, the traditional tube-shell heat exchanger needs intensive heat exchange tubes, and the finned tubes 14 needed by the finned tube 14 type heat exchange assembly are fewer, so that the number of welding joints or expansion joints is reduced, the manufacturing is simple and convenient, the length of the finned tubes 14 is shorter, automatic equipment is easy to manufacture, and the quality is easier to ensure.
Since the outer side of the finned tube 14 is provided with fins protruding from the tube body thereof, if the tube holes on the inner tube housing 3 are equal to the diameter of the tube body, the finned tube 14 cannot be directly inserted into the inner tube housing 3 due to the existence of the fins. In this case, the fin tubes 14 must be assembled by attaching the fin tubes 14 to the tube plate 6 on one side of the inner tube housing 3 and then assembling the tube plate 6 on the other side of the inner tube housing 3, which is difficult. It should be noted that this manner of mounting the finned tube 14 is difficult and in some cases does not preclude the use of this type of mounting for the finned tube 14.
In order to facilitate the assembly of the finned tube 14 into the inner tube housing 3, the finned tube 14 adopted in the present embodiment is the reducing finned tube 4, and the outer diameter of the end of the reducing finned tube 4 is larger than the outer diameter of the other positions of the special-shaped finned tube 14. The two ends of the finned tube 14 need to be connected with tube holes on the inner tube shell 3, and it is understood that, in order to facilitate the connection of the finned tube 14 with the tube holes, the two ends of the finned tube 14 are not provided with fins, and the end part of the finned tube 14 is of a tubular structure. In addition, the finned tube 14 is set to be the different-diameter finned tube 4, namely, one end of the finned tube 14 has a larger end, and correspondingly, a tube hole matched with the end can be arranged on the inner tube shell 3, and the finned tube 14 can be inserted into the inner tube shell 3 from the tube hole, so that the influence of fins is avoided.
Specifically, referring to fig. 9 to 12b, one end of the finned tube 14 is provided with a flared opening 15, the flared opening 15 and the finned tube 14 are coaxially arranged, and the outer diameter of the flared opening 15 is not smaller than the outer diameter of the finned tube 14. I.e. the flared end 15 and the finned tube 14 together form the reducing finned tube 4. The reduced diameter finned tube 4 means that the diameter of the flare 15 is different from the diameter of the body of the finned tube 14.
The transition surface between the flaring 15 and the tube body is a conical surface or an arc surface. The transition surface between the flaring 15 and the pipe body is made into a conical surface or an arc surface structure, so that the guiding effect can be achieved, and the assembly of the reducing finned pipe 4 is facilitated.
When the flaring 15 is in a tubular structure, the flaring 15 and the finned tube 14 are integrally rolled and formed, or the flaring 15 and the finned tube 14 are in a split structure and pass through the welded different-diameter finned tube 4.
The flaring 15 and the finned tube 14 are integrally rolled and formed, and specifically, the reducing finned tube 4 is manufactured by adopting a method of directly flaring 15 in a conical shape. The method of directly flaring 15 by the finned tube 14 is adopted to manufacture the different-diameter finned tube 4, and special equipment is needed.
The flaring 15 and the finned tube 14 are of split structures, the flaring 15 and the finned tube 14 are small sections of tubes made of 15 sections of flaring, and the tubes are connected with the finned tube 14 in a welding mode.
The specific connection mode between the inner tube shell 3 and the reducing fin tube 4 is as follows:
the inner tube shell 3 is provided with an upper tube hole and a lower tube hole which are arranged in a one-to-one correspondence manner. The flaring 15 is sleeved in the upper tube hole, and the lower end of the finned tube 14 is sleeved in the lower tube hole.
Specifically, referring to fig. 7, the flared opening 15 is inserted into the upper tube hole, and the other end of the reducing fin tube 4 opposite to the flared opening 15 is inserted into the lower tube hole. The flaring 15 is inserted in the upper pipe hole, the diameter of the upper pipe hole is also larger than that of the finned tube 14, namely, in the preparation process of the inner tube shell 3, the assembly of the different-diameter finned tube 4 from one side of the inner tube shell 3 can be realized as long as the upper pipe hole larger than the diameter of the finned tube 14 is arranged at one side of the inner tube shell 3 and the lower pipe hole with the same diameter as that of the finned tube 14 is arranged at the other side of the inner tube shell 3. Therefore, the finned tube 14 can be directly inserted into the inner tube shell 3 from the upper tube hole, and the convenience of installation of the finned tube 14 is improved.
The assembly mode of the different-diameter finned tube 4 is that the different-diameter finned tube 4 is inserted into the inner tube shell 3 and the end part of the different-diameter finned tube 4 and the corresponding tube hole are connected in a welding (expansion joint) mode.
A plurality of reducing fin tubes 4 are arranged in the inner tube shell 3, and the plurality of reducing fin tubes 4 are arranged in a staggered mode, so that a higher heat transfer coefficient can be obtained.
The material used for manufacturing the reducing finned tube 4 can be carbon steel. Stainless steel or other materials of choice are required for the design.
Referring to fig. 3, in the present embodiment, there is also provided a shell-and-tube heat exchanger, which includes the heat exchange assembly, and a tube shell 2, a tube plate 6, a left box and a right box.
The inner tube shell 3 is arranged in the tube shell 2, the end part of the inner tube shell 3 extends to the outer side of the tube plate 6, and two ends of the inner tube shell 3 are respectively communicated with the left box body and the right box body.
Specifically, the tube shell 2 and the tube plate 6 are connected together by welding, and the tube shell 2 is welded on the saddle support 5. The inner tube housing 3 is fitted inside the tube housing 2. The reducing fin tube 4 passes through the tube hole on the inner tube shell 3 and is connected with the inner tube shell 3 by welding (expansion joint). The pipe shell 2, the left pipe box 1 and the right pipe box 7 are all provided with pipe connecting seats 8, and various pipe connecting seats 8 are welded with the pipe shell 2, the left pipe box 1 and the right pipe box 7 respectively through a welding method. The left and right headers 1 and 7 are respectively bolted to the pipe casing 2. In the shell-and-tube heat exchanger provided by the present embodiment, the finned tubes 14 having a large specific surface area are used instead of the densely arranged ordinary heat exchange tubes. By adopting the reducing finned tube 4, the novel assembly method solves the problem of assembling the finned tube 14 on the inner tube shell 3.
The staggered different-diameter finned tubes 4 can obtain higher heat transfer coefficient.
The two heat exchange media are ensured to be in a cross state, the heat transfer capability is strong, and the heat exchange effect is good. The manufacturing is simple and convenient, the manufacturing is easy to adopt automatic equipment, and the quality is easier to ensure. Meanwhile, the novel finned tube 14 type shell-and-tube heat exchanger can reduce the volume of the heat exchanger and save materials and manufacturing cost.
Referring to fig. 13, it should be noted that: the inner tube shell 3 and the tube sheet 6 can be assembled by directly welding with the tube sheet 6 of the tube shell 2. The connection flange 13 can also be made on the inner tube shell 3 to be connected with the tube plate 6 by adopting a bolt connection method, so that the assembly and maintenance of the inner tube shell are convenient.
Referring to fig. 14, the assembly of the inner tube shell 3 to the tube shell 2 may be performed by welding directly to the tube sheet 6 of the tube shell 2. In order to solve the problem of thermal expansion of the inner tube shell 3, a bellows 9 may be additionally installed at the rear portion of the inner tube shell 3, that is, one end of the inner tube shell 3 is connected to the corresponding tube plate 6 through the bellows 9. In addition, a closure plate 10 is provided between the bellows 9 and the inner tube housing 3 to effect a seal therebetween.
The utility model can be suitable for manufacturing heat exchangers with various specifications and sizes. The heat exchanger can be in horizontal or vertical structure.
A guide plate 11 is arranged between the tube shell 2 and the inner tube shell 3, and the guide plate 11 is used for adjusting the flow direction of the heat exchange medium.
For further explanation of the shell-and-tube heat exchanger, the present embodiment also provides the working process of the heat exchanger:
during heat exchange, a medium enters the inner pipe shell 3 through the pipe connecting seat 8 of the left pipe box 1, washes the vertically installed different-diameter fin pipes 4 and flows out through the pipe connecting seat 8 of the right pipe box 7. The other medium enters the reducing fin tube 4 on the inner tube shell 3 through the tube connecting seat 8 on the tube shell 2 and exchanges heat with the medium in the reducing fin tube 4, the guide plate 11 is used for adjusting the flow direction of the heat exchange medium, and the other medium flows out through the tube connecting seat 8 of the tube shell 2. (the flow of the medium is only a simple description, and the medium can be liquid, gas, etc.)
In addition, the heat exchange assembly provided by the embodiment can be suitable for manufacturing shell-and-tube heat exchangers of various types, specifications and sizes. The heat exchanger can be in horizontal or vertical structure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A heat exchange assembly is characterized by comprising an inner tube shell and a fin tube;
the finned tube is inserted into the tube hole and extends into the inner tube shell, and the axis of the finned tube is perpendicular to the axis of the inner tube shell;
the finned tube is fixedly connected with the inner tube shell, and the joint of the finned tube and the inner tube shell is in sealing connection.
2. The heat exchange assembly of claim 1, wherein the finned tube is a reducing finned tube, and the outer diameter of the end of the reducing finned tube is larger than the outer diameter of the other positions of the special finned tube.
3. The heat exchange assembly of claim 2, wherein one end of the finned tube is provided with a flare;
the flaring and the finned tube are coaxially arranged, and the outer diameter of the flaring is not smaller than that of the finned tube.
4. The heat exchange assembly of claim 3, wherein the transition surface between the flare and the tube body is a tapered surface or an arcuate surface.
5. The heat exchange assembly of claim 3, wherein the inner tube shell is provided with upper tube holes and lower tube holes, and the upper tube holes and the lower tube holes are arranged in a one-to-one correspondence manner;
the flaring is sleeved in the upper pipe hole, and the lower end of the finned pipe is sleeved in the lower pipe hole.
6. The heat exchange assembly of claim 3 wherein the flare and the finned tube are roll formed in one piece;
or the flaring and the finned tube are of split structures and are welded to form the reducing finned tube.
7. A shell and tube heat exchanger comprising a heat exchange assembly as claimed in any one of claims 1 to 6, and a shell and tube, a tube sheet, a left box and a right box;
the two ends of the tube shell are provided with tube plates, and the left box body and the right box body are respectively connected with one corresponding tube plate;
the inner tube shell is arranged in the tube shell, the end part of the inner tube shell extends to the outer side of the tube plate, and the two ends of the inner tube shell are communicated with the left box body and the right box body respectively.
8. A shell and tube heat exchanger according to claim 7, characterized in that one of the ends of the inner tube shell is connected with the corresponding tube sheet by means of a bellows.
9. A shell and tube heat exchanger according to claim 7, characterized in that a flow deflector is arranged between the tube shell and the inner tube shell.
10. A shell and tube heat exchanger according to claim 7, wherein the heat exchange assembly is adapted for the manufacture of heat exchangers of different types, sizes and dimensions, the heat exchangers being of horizontal or vertical construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122187275.9U CN215810337U (en) | 2021-09-10 | 2021-09-10 | Heat exchange assembly and shell-and-tube heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122187275.9U CN215810337U (en) | 2021-09-10 | 2021-09-10 | Heat exchange assembly and shell-and-tube heat exchanger |
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| Publication Number | Publication Date |
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| CN215810337U true CN215810337U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122187275.9U Active CN215810337U (en) | 2021-09-10 | 2021-09-10 | Heat exchange assembly and shell-and-tube heat exchanger |
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| Country | Link |
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| CN (1) | CN215810337U (en) |
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2021
- 2021-09-10 CN CN202122187275.9U patent/CN215810337U/en active Active
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