CN220119911U - Detachable efficient double-pipe heat exchanger - Google Patents
Detachable efficient double-pipe heat exchanger Download PDFInfo
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- CN220119911U CN220119911U CN202321642826.9U CN202321642826U CN220119911U CN 220119911 U CN220119911 U CN 220119911U CN 202321642826 U CN202321642826 U CN 202321642826U CN 220119911 U CN220119911 U CN 220119911U
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- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A detachable efficient double-pipe heat exchanger is characterized in that: the pipe joint comprises an inner pipe inlet pipe box, an inner pipe inlet pipe box flange, a fixed end pipe plate, an O-shaped sealing ring, a clamping ring, a fixed end loop flange, an outer pipe connecting flange, an outer pipe inlet, a tee joint, an outer pipe, an inner pipe, a connecting pipe, a sliding end pipe plate, a sliding end loop flange, an inner pipe outlet pipe box, a connecting elbow, a bolt and nut assembly and an outer pipe outlet. When the double-pipe heat exchanger needs to clean dirt, the bolt and nut assembly is loosened, the inner pipe is pulled out along the sliding end towards the fixed end, and the outer pipe and the inner pipe can be thoroughly mechanically cleaned; after the cleaning is finished, the inner pipe is pushed in along the direction from the fixed end to the sliding end, and the bolt and nut assembly is screwed down to finish the assembly. The sleeve heat exchanger can be disassembled for cleaning, so that the tube bundle or the parts do not need to be replaced, and the operation and maintenance cost is greatly saved.
Description
Technical Field
The utility model relates to a heat exchanger technology in industries such as oil refining, chemical industry, metallurgy, power and the like, in particular to a heat exchanger with inner and outer pipes capable of being mechanically cleaned, and particularly relates to a detachable efficient double-pipe heat exchanger.
Background
The heat exchanger is a common device in the process industry and is used for exchanging heat between two or more fluids with temperature difference, so that the normal operation of the system is ensured, the energy is saved or the waste heat is recovered. The shell-and-tube heat exchanger is the most widely used heat exchanger at present, and has the advantages of simple structure and low cost, and the defects of flow dead zone at the baffle plate and low heat exchange efficiency. The sleeve heat exchanger has low heat exchange resistance and high heat transfer coefficient due to the annular flow formed between the inner tube and the outer tube, can realize the rapid cooling and rapid heating of fluid, and can be widely applied in some special occasions.
In the conventional double-pipe heat exchanger, the inner pipe and the outer pipe are welded together at the end parts through annular blind plates or sealing heads, as shown in fig. 1, the structure has the advantages of simple manufacture, and the disadvantage that an annular gap between the inner pipe and the outer pipe is required to be filled with cleaning fluid, otherwise, once the scale is blocked, the annular gap cannot be cleaned, the heat exchanger can only be scrapped for replacement, and in addition, the inner pipe and the outer pipe are welded into a whole, when the pipe shell process temperature difference is large, the temperature difference stress between the inner pipe and the outer pipe is overlarge, and the heat exchanger is extremely easy to damage. The patent number CN200810027960.1 'a double pipe heat exchanger' is characterized in that a plurality of double pipe monomers are assembled into double pipe heat exchangers with different specifications and forms according to a certain number and specifications through a detachable connecting tee joint, when an inner pipe needs to be cleaned, the double pipe monomers connected together can be disassembled, and manual cleaning and flushing are used, but the structure can only clean the inner pipe, and an annular gap between the inner pipe and the outer pipe cannot be disassembled for cleaning. The patent number CN200810156946.1 'removable high-efficiency sleeve heat exchanger' is a removable high-efficiency sleeve heat exchanger formed by integrating high-efficiency heat exchange tubes, a shell, a tube plate, a loose flange, a connecting elbow, a shell flange, sealing materials, bolts, nuts, gaskets and other parts, and the inner tube can be drawn out from the outer tube by loosening a bolt assembly, so that dirt on the outer tube and the outer surface of the inner tube can be directly cleaned; because the inner tube adopts the U-shaped tube, the U-shaped end of the inner tube can be freely stretched out and drawn back, and the problem of temperature difference stress between the inner tube and the outer tube is solved, but because the inner tube is of a U-shaped tube structure, dirt blockage can not be cleaned if formed at the U-shaped end. Patent number CN201720978383.9, "a completely detachable U-shaped double-pipe heat exchanger", solves the problems of the extractable inner pipe and the thermal stress of the inner pipe and the outer pipe, but the inner pipe is also U-shaped and cannot be cleaned mechanically.
Disclosure of Invention
The utility model aims to design a detachable efficient double-pipe heat exchanger aiming at the problems of temperature difference stress, inconvenient scaling cleaning and the like of inner and outer pipes of the existing double-pipe heat exchanger, so that the problem of temperature difference stress of the inner and outer pipes is solved, and the inner and outer pipes can be thoroughly cleaned. The utility model is particularly suitable for occasions where the inner pipe medium and the outer pipe medium are both easy-scaling medium and need to be cleaned regularly. In addition, the utility model adopts a special O-shaped ring sealing structure, belongs to self-tightening sealing, and can be applied to high-pressure (more than 10 MPa) occasions.
The technical scheme of the utility model is as follows:
a detachable efficient double-pipe heat exchanger is characterized in that: the inner pipe inlet pipe box 1, an inner pipe inlet pipe box flange 2, a fixed end pipe plate 3, an O-shaped sealing ring 4, a clamping ring 5, a fixed end looper flange 6, an outer pipe connecting flange 7, an outer pipe inlet 8, a tee joint 9, an outer pipe 10, an inner pipe 11, a connecting pipe 12, a sliding end pipe plate 13, a sliding end looper flange 14, an inner pipe outlet pipe box flange 15, an inner pipe outlet pipe box 16, a connecting elbow 17, a bolt and nut assembly 18 and an outer pipe outlet 19. The inner tube (11) is a straight tube, two ends of the inner tube are respectively connected with the fixed end tube plate 3 and the sliding end tube plate 13, the inner tube and the tube plates at the two ends are welded, expanded or welded and are connected, and the inner tube can be one or more. The outer diameter of the fixed end tube plate 3 and the sliding end tube plate 13 is smaller than the inner diameter of the outer tube 10 so as to be conveniently extracted from the outer tube. The outer wall of the fixed end tube plate 3 is provided with an annular groove. The tee joint 9 and the outer pipe connecting flange 7 are sequentially connected to the two ends of the outer pipe 10, and the branch pipe of the tee joint 9 is connected with the outer pipe inlet 8, the outer pipe outlet 19 or the connecting pipe 12 so as to realize inflow and outflow of medium in the outer pipe. The two ends of the inner tube are provided with an inner tube inlet tube box 1, an inner tube inlet tube box flange 2, an inner tube outlet tube box flange 15 and an inner tube outlet tube box 16. A fixed end looper flange 6 is arranged between the inner pipe inlet pipe box flange and the outer pipe connecting flange, and a step hole is formed in the inner surface of the fixed end looper flange. A clamping ring 5 is arranged between the fixed end looper flange and the fixed end tube plate, the clamping ring 5 is of a split structure and consists of two or more pieces, and when the bolt and nut assembly 18 is screwed down, the clamping ring can play a role in fixing the relative positions of the inner tube and the outer tube. The inner pipe inlet pipe box flange 2 and the snap ring 5, the fixed end looper flange 6 and the outer pipe connecting flange 7, the sliding end looper flange 14 and the inner pipe outlet pipe box flange 15 are all provided with O-shaped sealing rings 4 with half-moon-shaped cross sections. The inner pipe inlet pipe box flange 2, the fixed end looper flange 6 and the outer pipe connecting flange 7 are connected through a bolt and nut assembly 18. The inner pipe outlet pipe box flange 15, the sliding end looper flange 14 and the outer pipe connecting flange 7 are also connected by a bolt and nut assembly 18. The inner pipe outlet pipe box and the inner pipe inlet pipe box can be connected through a connecting elbow 17, and the sleeve heat exchanger with the structure is formed into a plurality of series structures.
The beneficial effects of the utility model are as follows:
by adopting the technical measures, the sliding end tube plate of the inner tube of the sleeve heat exchanger in the form can freely slide in the outer tube, so that the temperature difference stress between the inner tube and the outer tube is eliminated. The inner pipe and the outer pipe can be completely detached, the inner pipe and the outer pipe are straight pipes, and the inner surface and the outer surface of the inner pipe and the inner surface of the outer pipe can be thoroughly mechanically cleaned after the inner pipe and the outer pipe are detached, so that the service life of equipment can be prolonged, equipment replacement is avoided, and the running cost is reduced. The connecting elbow is not directly connected with the straight pipe section of the inner pipe, so that the inner extension distance is short, and convenient cleaning can be realized, so that the sleeve heat exchanger is particularly suitable for occasions where the pipe and the shell side medium are not clean or easy to scale. In addition, the inner pipe and the outer pipe are sealed by O-shaped rings, the sealing type is self-tightening line sealing, and the sealing type can be applied to high-pressure occasions.
Drawings
Fig. 1 is a conventional double pipe heat exchanger.
Fig. 2 is a schematic diagram of the present use novel double pipe heat exchanger.
Fig. 3 is an enlarged view of fig. 2 at i.
Fig. 4 is an enlarged view at ii of fig. 2.
Fig. 5 is a schematic view of an O-ring seal.
In the figure, the inner tube inlet tube box comprises a 1-inner tube inlet tube box flange, a 3-fixed end tube plate, a 4-O-shaped sealing ring, a 5-clamping ring, a 6-fixed end loop flange, a 7-outer tube connecting flange, an 8-outer tube inlet, a 9-tee joint, a 10-outer tube, an 11-inner tube, a 12-connecting tube, a 13-sliding end tube plate, a 14-movable end moving flange, a 15-inner tube outlet tube box flange, a 16-inner tube outlet tube box, a 17-connecting elbow, an 18-bolt and nut assembly and a 19-outer tube outlet.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 2.
A detachable efficient double-pipe heat exchanger consists of an inner pipe inlet pipe box 1, an inner pipe inlet pipe box flange 2, a fixed end pipe plate 3, an O-shaped sealing ring 4, a clamping ring 5, a fixed end loop flange 6, an outer pipe connecting flange 7, an outer pipe inlet 8, a tee joint 9, an outer pipe 10, an inner pipe 11, a connecting pipe 12, a sliding end pipe plate 13, a sliding end loop flange 14, an inner pipe outlet pipe box flange 15, an inner pipe outlet pipe box 16, a connecting elbow 17, a bolt and nut assembly 18 and an outer pipe outlet 19, as shown in figure 2. The inner tube 11 is a straight tube, two ends of the inner tube are respectively connected with the fixed end tube plate 3 and the sliding end tube plate 13, the inner tube and the tube plates at the two ends are welded, expanded or welded and are connected, and the number of the inner tube can be one or more. The outer diameter of the fixed end tube plate 3 and the sliding end tube plate 13 is smaller than the inner diameter of the outer tube 10 so as to be conveniently extracted from the outer tube. An annular groove (for installing a clamping ring 5) is formed in the outer wall of the fixed end tube plate 3. The tee joint 9 and the outer pipe connecting flange 7 are sequentially connected to the two ends of the outer pipe 10, and the branch pipe of the tee joint 9 is connected with the outer pipe inlet 8, the outer pipe outlet 19 or the connecting pipe 12 so as to realize inflow and outflow of medium in the outer pipe. The two ends of the inner tube are provided with an inner tube inlet tube box 1, an inner tube inlet tube box flange 2, an inner tube outlet tube box flange 15 and an inner tube outlet tube box 16. A fixed end looper flange 6 is arranged between the inner pipe inlet pipe box flange and the outer pipe connecting flange, and a step hole is formed in the inner surface of the fixed end looper flange. A clamping ring 5 is arranged between the fixed end looper flange and the fixed end tube plate, and the clamping ring 5 is of a split structure and consists of two or more pieces. The snap ring 5 is arranged in a hollow ring groove formed by the step hole of the fixed end looper flange and the annular groove of the fixed end tube plate. The snap ring 5 can serve to fix the relative position of the inner and outer tubes when the bolt and nut assembly 18 is tightened. O-shaped sealing rings 4 with half-moon-shaped cross sections are arranged between the inner pipe inlet pipe box flange 2 and the clamping ring 5, between the fixed end looper flange 6 and the outer pipe connecting flange 7, between the sliding end looper flange 14 and the outer pipe connecting flange 7, and between the sliding end looper flange 14 and the inner pipe outlet pipe box flange 15. The inner pipe inlet pipe box flange 2, the fixed end looper flange 6 and the outer pipe connecting flange 7 are connected through a bolt and nut assembly 18. The inner pipe outlet pipe box flange 15, the sliding end looper flange 14 and the outer pipe connecting flange 7 are also connected by a bolt and nut assembly 18. The detailed connection diagrams are respectively shown in fig. 3 and 4. By tightening the bolt and nut assembly 18, the O-ring 4 is pressed into intimate contact with the surface of the flange or tube sheet, thereby effecting the sealing of the inner tube to the outer tube, the sealing schematic being shown in fig. 5. The inner tube outlet tube box and the inner tube inlet tube box can be provided with connecting elbows 17 (connected through threaded nuts), and the sleeve heat exchanger with the structure can be formed into a plurality of series structures through the connection of the connecting elbows 17, and three inner tubes are connected into a heat exchanger with an S-shaped structure through the connecting elbows as shown in fig. 2.
When the inner and outer pipes need to be cleaned, the bolt and nut assembly 18 is loosened, and the inner pipe is pushed out from the sliding end to the fixed end. After the cleaning is completed, the O-shaped sealing ring, the looper flange and the clamping ring are assembled in sequence, the inner pipe is pushed in from the fixed end to the sliding end, and the bolt and nut assembly 18 is screwed down after the inner pipe is in place, so that the equipment assembly can be completed.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art who is skilled in the art to which the present utility model pertains should make equivalent substitutions or modifications according to the technical scheme and the inventive concept disclosed in the present utility model within the scope of the present utility model. 0018. The utility model is not related in part to the same as or can be practiced with the prior art.
The utility model is not related in part to the same as or can be practiced with the prior art.
Claims (4)
1. A detachable efficient double-pipe heat exchanger is characterized in that: the pipe box comprises an inner pipe inlet pipe box (1), an inner pipe inlet pipe box flange (2), a fixed end pipe plate (3), an O-shaped sealing ring (4), a clamping ring (5), a fixed end looper flange (6), an outer pipe connecting flange (7), an outer pipe inlet (8), a tee joint (9), an outer pipe (10), an inner pipe (11), a connecting pipe (12), a sliding end pipe plate (13), a sliding end looper flange (14), an inner pipe outlet pipe box flange (15), an inner pipe outlet pipe box (16), a connecting elbow (17), a bolt and nut assembly (18) and an outer pipe outlet (19); two ends of the inner tube (11) are respectively connected with the fixed end tube plate (3) and the sliding end tube plate (13), and the inner tube and the tube plates at the two ends are welded, expanded or welded and are connected; the outer wall of the fixed end tube plate (3) is provided with an annular groove; the two ends of the outer tube (10) are sequentially connected with a tee joint (9) and an outer tube connecting flange (7), and a branch tube of the tee joint (9) is connected with an outer tube inlet (8), an outer tube outlet (19) or a connecting tube (12) so as to realize inflow and outflow of medium in the outer tube; the two ends of the inner tube are provided with an inner tube inlet tube box (1), an inner tube inlet tube box flange (2), an inner tube outlet tube box flange (15) and an inner tube outlet tube box (16); a fixed end looper flange (6) is arranged between the inner pipe inlet pipe box flange and the outer pipe connecting flange, and a step hole is formed in the inner surface of the fixed end looper flange; a clamping ring (5) is arranged between the fixed end looper flange and the fixed end tube plate, an inner tube inlet tube box flange (2) and the clamping ring (5), a fixed end looper flange (6) and an outer tube connecting flange (7), a sliding end looper flange (14) and the outer tube connecting flange (7), O-shaped sealing rings (4) with half-moon-shaped cross sections are arranged on the sliding end looper flange (14) and the inner tube outlet tube box flange (15), the inner tube inlet tube box flange (2), the fixed end looper flange (6) and the outer tube connecting flange (7) are connected through a bolt and nut assembly (18), the inner tube outlet tube box flange (15), the sliding end looper flange (14) and the outer tube connecting flange (7) are connected through a connecting elbow (17), and the inner tube outlet tube box and the inner tube inlet tube box are connected through the connecting elbow (17) to form a plurality of serial structures through the connecting elbow (17).
2. The removable high efficiency double pipe heat exchanger of claim 1, wherein: the inner tube (11) is a straight tube, and the number of the inner tubes is one or more.
3. The removable high efficiency double pipe heat exchanger of claim 1, wherein: the outer diameters of the fixed end tube plate (3) and the sliding end tube plate (13) are smaller than the inner diameter of the outer tube (10) so as to be conveniently drawn out of the outer tube.
4. The removable high efficiency double pipe heat exchanger of claim 1, wherein: the clamping ring (5) is of a split structure and consists of two or more pieces, and the clamping ring plays a role in fixing the relative positions of the inner tube and the outer tube after the bolt and nut assembly (18) is screwed down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321642826.9U CN220119911U (en) | 2023-06-27 | 2023-06-27 | Detachable efficient double-pipe heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321642826.9U CN220119911U (en) | 2023-06-27 | 2023-06-27 | Detachable efficient double-pipe heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220119911U true CN220119911U (en) | 2023-12-01 |
Family
ID=88914362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321642826.9U Active CN220119911U (en) | 2023-06-27 | 2023-06-27 | Detachable efficient double-pipe heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220119911U (en) |
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2023
- 2023-06-27 CN CN202321642826.9U patent/CN220119911U/en active Active
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