CN219640754U - Coiled pipe heat exchanger - Google Patents
Coiled pipe heat exchanger Download PDFInfo
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- CN219640754U CN219640754U CN202320399956.8U CN202320399956U CN219640754U CN 219640754 U CN219640754 U CN 219640754U CN 202320399956 U CN202320399956 U CN 202320399956U CN 219640754 U CN219640754 U CN 219640754U
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- serpentine
- heat exchanger
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- tubes
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- 238000009826 distribution Methods 0.000 claims abstract description 42
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a heat exchanger for cold and heat exchange, in particular to a coiled pipe heat exchanger which comprises coiled pipes, an inlet distribution header and an outlet header. The staggered arrangement is beneficial to solving the problem of height difference of the zigzag pipes arranged in staggered arrangement in a vertical plane, so that the inlet distribution header and the outlet header are realized by adopting round pipes, and the weight of the two headers is reduced by at least 80 percent and the volume is also greatly reduced on the premise that the bearing of the two headers is ensured.
Description
Technical Field
The utility model relates to a heat exchanger for cold and heat exchange, in particular to a serpentine tube heat exchanger which consists of a plurality of rows of serpentine heat exchange tubes, a header, an upper connecting tube of the header, a maintenance frame body and the like.
Background
The coiled pipe heat exchanger is a dividing wall type heat exchanger, can be used as a cooler and a condenser and also can be used as an evaporator, and is the most widely applied dividing wall type heat exchanger in various fields such as electric power, chemical industry, refrigeration, air conditioning and the like.
Because the heat exchange coefficient is lower, the space occupied by the heat exchanger is reduced for the space utilization, the coiled pipe for heat exchange is generally arranged in a plurality of rows and staggered way, and the medium inlet distribution headers and the medium outlet headers are respectively arranged at the upper end and the lower end of the coiled pipe, so that the coiled pipe arranged in a plurality of rows and staggered way is formed to work in parallel, the occupied space is greatly reduced, and the coiled pipe heat exchanger as a whole is applied to production practice.
It is known by those skilled in the art that ensuring proper heat exchange of the parallel heat exchange tubes is not enough to ensure uniform pressure loss of the medium flowing in each heat exchange tube by equalizing the diameter and length of each heat exchange tube, and it is also necessary to ensure that the cross-sectional areas of the medium inlet distribution header and the medium outlet header are both larger than the sum of the cross-sectional areas of all the serpentine tubes connected to the header, so that the inlet distribution header can uniformly distribute the medium to each serpentine tube, and the medium outlet header is ensured not to generate back pressure, thereby preventing the capability of the whole heat exchanger from being affected due to uneven heat exchange of the serpentine heat exchange tubes.
Fig. 1 is a schematic diagram of the outline structure of a conventional serpentine heat exchanger in a multi-row staggered arrangement, fig. 2 is a schematic diagram of the outline structure of each row of serpentine tubes of the conventional serpentine heat exchanger, and fig. 3 is a schematic diagram of the medium inlet distribution header and the medium outlet header of the conventional serpentine heat exchanger. As can be seen from figures 1-3, the pressure loss of the medium in each heat exchange tube can be completely consistent as long as the sectional areas of the medium inlet distribution header and the medium outlet header are enough, so that the purpose of normal operation of the conventional serpentine tube heat exchanger is achieved.
As can be seen from fig. 3, the medium inlet distribution header and the medium outlet header of the conventional serpentine tube heat exchanger are formed by welding two L-shaped or two groove-shaped sections and two straight sealing plates at two ends, the rear end L-shaped or groove-shaped section is provided with an upper row of holes and a lower row of holes for welding serpentine tubes, and the front end L-shaped or groove-shaped section is respectively provided with a medium inlet connection tube and a medium outlet connection tube.
Those skilled in the art will appreciate that with opposite sides, the circular cross-sectional area is much larger than the square, rectangular cross-sectional area, and therefore, to meet the manifold cross-sectional area being larger than the sum of the serpentine cross-sectional areas, the media inlet distribution manifold and the media outlet require much more material, one of them; secondly, for the containers and pipelines generating phase change, the containers with the same material, the same volume, the same medium and the same pressure, the wall thickness of the non-circular container and the wall thickness of the pipeline are more than 5 times of that of the circular container, and the header pipe formed by welding two L-shaped or two groove-shaped sectional materials consumes at least 5 times of that of the circular container from the angle; thirdly, welding grooves must be machined before welding the two L-shaped or two groove-shaped sectional materials and the two straight sealing plates at the two ends, otherwise, the bearing capacity is insufficient, and therefore a large amount of machining cost is caused; fourthly, the welding workload of two L-shaped or two groove-shaped sectional materials is huge, and almost accounts for 50% of the welding workload of the whole heat exchanger; fifthly, welding seams of welding two L-shaped or two groove-shaped sectional materials and welding seams of two straight sealing plates at two ends are necessarily welding seam intersection points, and the welding seam intersection points are the most concentrated weak points of stress.
For this reason, the wall thicknesses of the two L-shaped or two groove-shaped profiles of the header of the evaporator-condenser consisting of the serpentine heat exchanger of many enterprises are not used according to the pressure-bearing requirements, but are simply thinned to reduce the weight and the cost, and the safety accidents caused by the thickness are not uncommon in practical application.
Disclosure of Invention
In order to overcome the technical problems or one of the technical problems existing in the prior art, the utility model provides a novel serpentine tube heat exchanger with a simple structure, which can overcome the defects of the prior art, reduce the cost, improve the installation efficiency and ensure the safety in the operation process. The technical scheme adopted by the utility model is as follows:
unlike the prior art, the serpentine tube heat exchanger includes an upper row of serpentine tubes and a lower row of serpentine tubes, which are staggered in a vertical direction. The staggered arrangement is beneficial to solving the problem of height difference of the staggered coiled pipes on the vertical plane, so that the inlet distribution header and the outlet header are realized by adopting round pipes, and the weight of the two headers is reduced by at least 80 percent and the volume is also greatly reduced on the premise that the bearing of the two headers is ensured.
Further, the lower end outlet of the upper-row serpentine tube is bent downward by 90 degrees and then is provided with a short straight tube, and the upper end inlet of the lower-row serpentine tube is bent upward by 90 degrees and then is provided with a short straight tube. Therefore, the pressure loss of each row of coiled pipes is consistent, and the purpose of normal and uniform heat exchange of each row of coiled pipes is achieved.
Further, the lower surface and the back surface of the inlet distribution header are respectively provided with insertion holes of upper-row coiled pipes and lower-row coiled pipes, and the front surface is provided with insertion holes of inlet connecting pipes; the top surface and the back surface of the outlet header are respectively provided with insertion holes of upper-row coiled pipes and lower-row coiled pipes, and the front surface of the outlet header is provided with insertion holes of outlet connecting pipes.
Further, the cross sections of the upper-row coiled pipes, the lower-row coiled pipes, the inlet distribution header and the outlet header are round or oval, and the two ends of the inlet distribution header and the outlet header are fixedly connected with sealing heads with corresponding shapes. The inlet distribution header and the outlet header adopt round pipes, so that the problem of stress concentration of intersection of welded junctions is solved, and the welding workload of the inlet distribution header and the outlet header of the serpentine heat exchanger is reduced by more than 98%, and the welding workload of the whole serpentine heat exchanger is reduced by more than 50%. The outlet header adopts a round tube, so that the problem that the medium filling amount of the whole system is unnecessarily increased due to excessive medium liquid stored in the outlet header is greatly reduced.
Further, when the cross sections of the upper and lower rows of serpentine tubes are elliptical, both ends thereof gradually transition into a circular shape.
Further, the device also comprises a left side fixing plate, a right side fixing plate and a middle fixing plate, wherein the right side of the left side fixing plate is provided with a semicircular groove for avoiding the coiled pipe, the left side of the right side fixing plate is provided with a semicircular groove for avoiding the coiled pipe, and the left side and the right side of the middle fixing plate are respectively provided with a semicircular groove for avoiding the coiled pipe; the diameter of the semicircular groove is slightly larger than that of the coiled pipe. This ensures that the serpentine tube, inlet distribution header, outlet header, and frame of the serpentine tube heat exchanger are formed as a single unit.
Other aspects and features of the present utility model, as well as its advantages, will be described in more detail in the specification, by way of example, with reference to the following detailed description of the utility model, which is illustrated in the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a conventional serpentine tube heat exchanger;
FIG. 2 is a schematic view of the structure of each row of serpentine tubes of a conventional serpentine tube heat exchanger;
FIG. 3 is a schematic view of the structure of an inlet distribution header and a medium outlet header of a conventional serpentine heat exchanger;
FIG. 4 is a schematic diagram of the structure of the present utility model;
FIG. 5 is a schematic view of the structure of the hidden frame of the present utility model;
FIG. 6 is a schematic view of the structure of the frame of the present utility model;
FIG. 7 is a schematic view of an upper serpentine heat exchange tube of the present utility model;
FIG. 8 is a schematic view of a lower serpentine heat exchange tube according to the present utility model;
FIG. 9 is a schematic view of the structure of the inlet distribution header of the present utility model;
FIG. 10 is a schematic view of the structure of the outlet header of the present utility model;
FIG. 11 is a schematic view of the structure of the left side fixing plate of the present utility model;
FIG. 12 is a schematic view of the right side fixing plate of the present utility model;
fig. 13 is a schematic structural view of the intermediate fixing plate of the present utility model.
Detailed Description
Specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
As shown in fig. 4, a serpentine tube heat exchanger 10 according to the present utility model is mainly composed of an upper row of serpentine heat exchange tubes 101, a lower row of serpentine heat exchange tubes 102, an inlet distribution header 103, an inlet nipple 104, an outlet header 105, an outlet nipple 106, a front-rear end serpentine left-side fixing plate 107, a front-rear end serpentine right-side fixing plate 108, a front-rear end serpentine intermediate fixing plate 109, and a frame 20, and its detailed structure is described as follows:
the number of the upper-row serpentine heat exchange tubes 101 and the number of the lower-row serpentine heat exchange tubes 102 of each serpentine heat exchanger are determined by the total heat exchange surface required by the heat exchanger, the number of the front-end and rear-end serpentine tube fixing plates 109 is equal to the sum of the numbers of the upper row of serpentine tubes and the lower row of serpentine tubes minus 1 respectively, a plurality of rows of serpentine tube fixing plates 107, 108 and 109 are specifically arranged in front of and behind each heat exchanger according to the length of the serpentine tube heat exchanger so as to meet the requirement of the strength and rigidity of the whole heat exchanger, and elliptical sealing heads 110 are respectively arranged at two ends of the inlet distribution header 103 and two ends of the outlet header 105.
The frame 20 is composed of a left side upper longitudinal beam 201, a left side lower longitudinal beam 202, a right side upper longitudinal beam 203, a right side lower longitudinal beam 204, a rear end upper cross beam 205, a rear end lower cross beam 206, a front end upper cross beam 207, a front end lower cross beam 208, a left front corner upright 209, a left rear corner upright 210, a right front corner upright 211, a right rear corner upright 212, a left wind deflector 213, a right wind deflector 214, a rear end wind deflector 215, and a front end wind deflector 216.
The upper end of the left side fixing plate 107 of the coiled pipe is welded with the left side upper longitudinal beam 201 of the frame 20, the lower end thereof is welded with the left side lower longitudinal beam 202 of the frame 20, the upper end of the right side fixing plate 108 of the coiled pipe is welded with the right side upper longitudinal beam 203 of the frame 20, the lower end thereof is welded with the right side lower longitudinal beam 204 of the frame 20, the left upper end and the lower end of the fixing plate 109 between the leftmost coiled pipes are respectively welded with the upper end and the lower end of the fixing plate 107 between the coiled pipes, the right upper end and the lower end of the fixing plate 109 between the rightmost coiled pipes are respectively welded with the upper end and the lower end of the fixing plate 108 between the coiled pipes, and the left side and the right side of the upper end and the lower end of the upper end of the fixing plate 109 between the coiled pipes between the adjacent coiled pipes are respectively welded with the upper end and the lower end of the fixing plate 109 between the coiled pipes between the right side and the adjacent coiled pipes.
The medium inlet straight pipes of each row of serpentine pipes 101 are inserted into corresponding holes on the back of the inlet distribution header 103, the short straight pipes with the lower ends bent by 90 degrees are inserted into corresponding holes on the upper ends of the outlet headers 105, and the inlets and the outlets of each row of serpentine pipes are welded with the inlet distribution header 103 and the outlet headers 105 by full-face welding; the upper 90 degree short straight tube of each lower row of serpentine tubes 102 is inserted into a corresponding hole in the lower portion of the inlet distribution header 103, and the straight tube outlet ends thereof are directly inserted into corresponding back holes in the outlet header 105, and the inlet and outlet of each lower row of serpentine tubes are welded with the inlet distribution header 103 and the outlet header 105 by full-face welding, respectively.
The inlet connection pipe 104 is welded to the inlet distribution header 103, the outlet pipe 106 is welded to the outlet header 105, and both ends of the inlet distribution header 103 and the end caps 110 at both ends thereof, and both ends of the outlet header 105 and the end caps 111 at both ends thereof are welded by full-length welding.
In assembly, first, the left side upper side member 201, the left side lower side member 202, the right side upper side member 203, the right side lower side member 204, the rear end upper cross member 205, the rear end lower cross member 206, the front end upper cross member 207, and the front end lower cross member 208 of the frame body 20 are welded as a whole; then the welded assembly of the inlet distribution header 103 and the inlet connection pipe 104, and the welded assembly of the outlet header 105 and the outlet connection pipe 106 are respectively fixed on the front upper beam 207 and the front lower beam 208 of the frame body 20 according to the drawing requirements; then, the upper and lower ends of the left fixing plate 107 of the serpentine tube at the front and rear ends are welded to the left side upper side member 201 and the left side lower side member 202 of the frame body 20.
Next, the inlet ends of the upper leftmost serpentine tube 101 are inserted into the first holes on the back of the inlet distribution header 103, the lower short straight tubes of the 90 DEG bends at the lower ends thereof are inserted into the first holes on the leftmost top of the outlet header 105, the upper serpentine tube 101 is fully welded to the inlet distribution header 103 and the outlet header 105, the front and rear fixing plates 109 between the leftmost serpentine tubes are installed, the upper leftmost first serpentine tube 101 is placed in the holes formed by the leftmost serpentine tube fixing plates 107 and the front and rear fixing plates 109 between the leftmost serpentine tubes, then the upper and lower ends of the upper leftmost first serpentine tube fixing plates 109 are welded to the upper and lower ends of the leftmost serpentine tube fixing plates 107, respectively, then the first serpentine tubes 102 of the lower left row are installed, when the first serpentine tubes 102 of the lower left row are installed, the upper short straight tubes of 90 DEG of the first serpentine tubes 102 of the lower left row are first inserted into the first holes on the lower side of the inlet distribution header 103, the lower outlet end of the first coil 102 is directly inserted into the left first hole on the back of the outlet header 105, the upper and lower ends of the first coil 102 are welded with the inlet distribution header and the outlet header, respectively, then the second left coil fixing plate 109 is installed, the first lower left coil is placed in the hole formed between the first left coil fixing plate 109 and the second left coil fixing plate 109, then the upper and lower ends of the first left coil fixing plate 109 and the second left coil fixing plate 109 are welded, the second upper left coil 101 and the third left coil fixing plate 109 are sequentially installed in the above manner until the installation and welding of the right-most lower coil 102 and the right-most coil fixing plate 108 are completed, after the inside of the inlet distribution header 103 and the outlet header 105 is cleaned, elliptical heads 110 and 111 at the two ends of the inlet distribution header 103 and the outlet header 105 are respectively welded with the inlet distribution header 103 and the outlet header 105, and finally a left wind shield 213 of the frame body 20 is respectively fixed with an upper longitudinal beam 201, a lower longitudinal beam 202, a left front corner upright column 209 and a left rear corner upright column 210 of the frame body 20; the right wind shield 214 is respectively fixed with the frame body 20 by a side upper longitudinal beam 203, a side lower longitudinal beam 204, a right front corner upright post 211 and a right rear corner upright post 212; the rear end wind shield 215 is respectively fixed with the frame body 20 by a rear end upper beam 205, a rear end lower beam 206, a left rear corner upright 210 and a right rear corner upright 211; the front wind guard 216 is fixed with the front upper beam 207, the front lower beam 208, the left front corner upright 209 and the right front corner upright 211 respectively, and the whole serpentine tube heat exchanger is assembled.
Compared with the prior art, the utility model has the following advantages:
the optimal design is realized, and the working procedures of cutting plates, bending, processing, welding and cracking the inlet distribution header and the outlet header are omitted, namely, the tube plate manufacturing does not need to waste resources such as a plate cutting machine, a bending machine, a milling machine and the like, so that the structure is simple, the manufacturing is convenient, and the cost is low;
the material consumption is less, the inlet distribution header and the outlet header are changed from square headers to round headers, and the material consumption weight is reduced by more than 80%, so that the thickness of the frame body material can be greatly reduced;
the manufacturing and assembling efficiency is high, the manufacturing process is greatly reduced, the welding seam is greatly reduced, and the manufacturing and assembling efficiency is greatly improved;
the inlet distribution header and the outlet header are round tubes, so that the pressure bearing of the inlet distribution header and the outlet header is ensured, and the problem of stress concentration of the headers due to the crossing of welding seams is solved, thereby being safe and reliable.
While the preferred embodiments of the present utility model have been described above by way of illustration, the scope of the utility model is not limited to the above description but is defined by all technical features set forth in the appended claims and their equivalents. It will be appreciated by those skilled in the art that any modifications and variations may be made without departing from the spirit and scope of the teachings of the present utility model, and that such modifications and variations are intended to fall within the scope of the appended claims.
Claims (6)
1. A serpentine tube heat exchanger (10) comprising a serpentine tube, an inlet distribution header (103) and an outlet header (105), wherein the serpentine tube is divided into an upper row of serpentine tubes (101) and a lower row of serpentine tubes (102), and the upper row of serpentine tubes (101) and the lower row of serpentine tubes (102) are staggered in a vertical direction.
2. A serpentine tube heat exchanger (10) according to claim 1 wherein the lower outlet of the upper row of serpentine tubes (101) is bent downwardly 90 ° with a short straight tube and the upper inlet of the lower row of serpentine tubes (102) is bent upwardly 90 ° with a short straight tube.
3. A serpentine tube heat exchanger (10) according to claim 1, wherein the inlet distribution header (103) has lower and back openings for upper and lower rows of serpentine tubes (101, 102), respectively, and the front opening has inlet nipple (104) openings; the top surface and the back surface of the outlet header (105) are respectively provided with insertion holes of an upper-row coiled pipe (101) and a lower-row coiled pipe (102), and the front surface is provided with insertion holes of outlet connecting pipes (106).
4. A serpentine tube heat exchanger (10) according to any one of claims 1-3 wherein the upper rows of serpentine tubes (101), the lower rows of serpentine tubes (102), the inlet distribution header (103) and the outlet header (105) are circular or oval in cross-section, and the ends of the inlet distribution header (103) and the outlet header (105) are fixedly attached to correspondingly shaped headers (110).
5. A serpentine tube heat exchanger (10) according to claim 4 wherein when the upper row of serpentine tubes (101) and the lower row of serpentine tubes (102) are elliptical in cross section, the ends thereof gradually transition to a circular shape.
6. A serpentine tube heat exchanger (10) according to any one of claims 1-3, further comprising a left side fixing plate (107), a right side fixing plate (108) and a middle fixing plate (109), wherein the right side of the left side fixing plate (107) is provided with a semicircular groove for avoiding the serpentine tube, the left side of the right side fixing plate (108) is provided with a semicircular groove for avoiding the serpentine tube, and the left and right sides of the middle fixing plate (109) are respectively provided with semicircular grooves for avoiding the serpentine tube; the diameter of the semicircular groove is slightly larger than that of the coiled pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320399956.8U CN219640754U (en) | 2023-07-03 | 2023-07-03 | Coiled pipe heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320399956.8U CN219640754U (en) | 2023-07-03 | 2023-07-03 | Coiled pipe heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219640754U true CN219640754U (en) | 2023-09-05 |
Family
ID=87808173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320399956.8U Active CN219640754U (en) | 2023-07-03 | 2023-07-03 | Coiled pipe heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219640754U (en) |
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2023
- 2023-07-03 CN CN202320399956.8U patent/CN219640754U/en active Active
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