CN208223269U - A kind of boiler inner fin heat exchange tube - Google Patents
A kind of boiler inner fin heat exchange tube Download PDFInfo
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- CN208223269U CN208223269U CN201820786022.9U CN201820786022U CN208223269U CN 208223269 U CN208223269 U CN 208223269U CN 201820786022 U CN201820786022 U CN 201820786022U CN 208223269 U CN208223269 U CN 208223269U
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Abstract
A kind of boiler inner fin heat exchange tube, heat exchanger tube includes steel outer tube, circular aluminium inserts is embedded in steel outer tube, it is made of on aluminium inserts circular section two semicircle shells with pectination fin, multiple fins are integrally provided in cambered surface in two semi circular shells bodies with pectination fin, two semicircle shells are respectively semicircle shell one, semicircle shell two, each fin on semicircle shell two is plugged in the gap of two adjacent fins on semicircle shell one, there is on the upper and lower end face of each fin from root to end continuous dentation, after two semicircle shells combine, gap between the tooth root line of each tooth in any one fin lower ends face and the tooth root line of each tooth of the fin upper surface under it is identical, angle between the tooth root line of the tooth of the tooth root line and lower end surface of the tooth of each fin upper surface is 3-4 degree.This heat exchanger tube is high-efficient.
Description
Technical field
The utility model relates to boiler heat exchange field, in particular to a kind of boiler inner fin heat exchange tube belongs to exchange piece
Technical field.
Background technique
Interior finned tube is boiler heat exchange pipe using a main species, and finned tube is even more due to its heat exchange efficiency height in aluminium insert
It is widely used, common structure is usually the aluminium inserts that is embedded in stainless steel hollow pipe, has wing on aluminium inserts
Piece, the gap between fin constitute thermal medium fluid channel, and the heat exchanger tube of this formation significantly increases the heat exchange of heat exchanger tube
Area, the thermal efficiency can achieve nearly 5 times of light pipe efficiency, and in this heat exchanger tube, the action breaks down thermal boundary layer of fin is strong
Change sensible heat heat convection, condensate film on wall surface on the one hand is thinned by the effect of fin, on the other hand makes to have condensed
Condensate liquid can be discharged in time, and the growth of condensate film thickness is prevented to strengthen condensing heat-exchange to destroy condensate film.However for
For the flue gas generated after fuel gas buring, incoagulable gas volume share account for it is 80% or so even higher, in entire condensation process,
The dominant thermal resistance for influencing vapor condensing heat-exchange is not condensate film but incoagulable gas layer.Therefore strengthen flue gas condensing heat exchange
Main method be that incoagulable gas layer is thinned, test proves, the heat exchange efficiency of inner fin heat exchange tube and the quantity of inner fin
And fluid channel size, distribution, shape therebetween all has direct relation, currently there are different fins between
Gap, finned length, whether open up on fin tooth form exchange heat pipe efficiency have it is direct influence, produced in the design of interior finned tube
In, for boiler heat exchange pipe, research and develop the heat exchange efficiency that the interior fin structure that its one kind more optimizes is able to ascend boiler.
Summary of the invention
The purpose of the utility model is to overcome the above problem of the embedding pipe of current aluminium in actual use, provide a kind of pot
Furnace inner fin heat exchange tube.
To realize the purpose of this utility model, using following technical solutions: a kind of boiler inner fin heat exchange tube, it is described
Heat exchanger tube include steel outer tube, circular aluminium inserts is embedded in steel outer tube, by two bands on the aluminium inserts circular section
The semicircle shell of pectination fin forms, and is integrally provided in cambered surface in two semi circular shells bodies with pectination fin multiple
Fin, multiple fins form pectination fin, and it is circular that two semicircle shells with pectination fin, which are combined and to be formed external,
Aluminium inserts, the described two semicircle shells with pectination fin are respectively semicircle shell one, semicircle shell two, the semi circular shells
Than semicircle shell more than 2 one, each fin on semicircle shell two is plugged on semicircle shell one number of fins on body one
In the gap of two adjacent fins, when the line of two semicircle shell binding sites is vertical direction, above and below each fin
From root to end there is one section of youngster or all continuous dentations, root to refer to fin and semicircle shell one or semi circular shells on end face
The position that body two connects, after end refers to that the opposite end of root, two semicircle shells combine, any one fin lower ends face
Each tooth tooth root line it is identical as the gap between the tooth root line of each tooth of the fin upper surface under it, each fin is thick
The middle line for spending direction is equal, the described each fin of the distance between horizontal direction and the middle line in any two fin thickness direction
For the shape that root is wide, end is narrow, between the tooth root line of the tooth of the tooth root line and lower end surface of the tooth of each fin upper surface
Angle is 3-4 degree, and above-mentioned angle is divided equally by the middle line on fin thickness direction；Further；On the semicircle shell one
Fin number is six, and middle line of six fins two-by-two about one short transverse of semicircle shell is symmetrical, on semicircle shell two
Fin number is five, and the middle line and two short transverse middle line of semicircle shell of the thickness direction of fin are located in the middle in five fins
It is overlapped, four additional fin is symmetrical about two short transverse middle line of semicircle shell two-by-two；Further；Two semi circular shells
It is 61 ± 0.5mm that body, which combines and to form the outer diameter that outer surface is circular aluminium inserts, and two semicircle shells do not have fin part
The wall thickness of position is 2mm ± 0.1mm；Further；After two semicircle shells combine, two adjacent fins thickness direction
The distance between middle line be 5 ± 0.5mm；Further；Each fin end portion is described continuous with a thickness of 2mm ± 0.2mm
Dentation do not extend to fin end portion, fin end portion does not have the length of dentation to be more than or equal to 1mm；Further；When two semicircles
When the line of shell binding site is vertical direction, the line of from two semicircle shell binding sites of each fin medial end portions is maximum
It is more than or equal to a distance from be less than or equal to 20mm, line of each fin medial end portions from two semicircle shell binding sites is the smallest
6mm。
The positive advantageous effects of the utility model are: the utility model by reasonably set fin quantity,
The size in gap and the length of fin between fin, tests prove that, using this heat exchanger tube, more current light pipe heat exchange efficiency can
With improve 6 times or so, higher than currently there are embedded aluminum finned tube heat exchange tube efficiency.
Detailed description of the invention
Fig. 1 is the schematic diagram in the utility model section.
Fig. 2 is the schematic diagram of pectination fin.
Fig. 3 is the stereoscopic schematic diagram of the utility model.
Specific embodiment
In order to more fully explain the implementation of the utility model, the embodiment of the utility model is provided.These implement real
Example is only the elaboration to the utility model, does not limit the scope of the utility model.
In conjunction with attached drawing to the further details of explanation of the utility model, respectively marked in attached drawing are as follows: 1: semicircle shell one；2: half
Round casing two；3: fin one；4: fin two；5: fin three；6: fin four；7: fin five；8: fin six；9: fin seven；10: wing
Piece eight；11: fin nine；12: fin ten；13: fin 11；14: the middle line of six thickness direction of fin；15: end；16: root；
17: tooth；18: tooth root.It should be noted that the state when line of two semicircle shell binding sites of Fig. 1 is vertical direction
It is the application selected state for ease of description, does not represent necessary state in its actual use.
As shown in the picture, a kind of boiler inner fin heat exchange tube, the heat exchanger tube include steel outer tube, and outer steel pipe does not have in figure
It shows, corrodes in order to prevent, steel outer tube generally selects stainless steel tube, and circular aluminium inserts, steel outer tube are embedded in steel outer tube
It can be made to be closely linked using draw technique with aluminium inserts, by two band pectination wings on the aluminium inserts circular section
The semicircle shell of piece forms, and two semicircle shell ends faces can be combined by mutually matched fin and groove, and described two
Multiple fins are integrally provided in semi circular shells body with pectination fin in cambered surface, multiple fins form pectination fin, two bands
It is circular aluminium inserts that the semicircle shell of pectination fin, which is combined and to be formed external,.
Semicircle shell of described two with pectination fin is respectively semicircle shell 1, semicircle shell 22, and described half
Fin of the number of fins than semicircle shell more than 2 one, in the utility model, on the semicircle shell one on round casing one
Number is six, and Fig. 1 show the state when line of two semicircle shell binding sites is vertical direction, at this point, two semicircles
The line of shell binding site is the diameter of circular aluminium inserts vertical direction, and 3,5,7,9,11,13 are and half shown in Fig. 1
Six fins of one integrally connected of round casing, middle line of six fins two-by-two about one short transverse of semicircle shell is symmetrical,
I.e. 3,13 symmetrically, 5,11 symmetrically, 7,9 symmetrically, the middle line of six thickness direction of fin shown in 14 is half in figure
The middle line of two short transverse of middle line and semicircle shell of one short transverse of round casing, the fin number on semicircle shell two are five
A, 4,6,8,10,12 be five pectination fins on semicircle shell two shown in Fig. 1, on semicircle shell two in five fins
The middle line of the thickness direction for being located in the middle fin be overlapped with two short transverse middle line of semicircle shell, 8 show semicircle in figure
Fin is located in the middle on shell two in five fins, four additional pectination fin is two-by-two about in two short transverse of semicircle shell
Line is symmetrical；It is i.e. 4,12 symmetrical, 6, it is 10 symmetrical, each fin on semicircle shell two is plugged in two on semicircle shell one
In the gap of adjacent fin, as shown in Figure 1, having one section of youngster or all on the upper and lower end face of each fin from root to end
Continuous dentation, 17 show tooth, and root refers to the position that pectination fin is connect with semicircle shell one or semicircle shell two, and end refers to
The opposite end of root, 16 show root in Fig. 1, and 15 show end, each pectination fin end portion with a thickness of 2mm ±
0.2mm, the continuous dentation do not extend to pectination fin end portion, and end does not have the length of dentation to be more than or equal to 1mm；Two and half
After round casing combines, the tooth root line of each tooth in any one fin lower ends face and the pectination fin upper end being located under it
Gap between the tooth root line of each tooth in face is identical, and 18 show tooth root, and in the present embodiment, the width at 18 position of tooth root is used
3mm, the maximum width of tooth also use 3mm, and the height of tooth is less than or equal to 0.25mm, and the middle line in each fin thickness direction is level side
To and any two fin thickness direction the distance between middle line it is equal, more specifically, two neighboring pectination fin thickness
The distance between the middle line in direction is 5 ± 0.5mm；Each pectination fin is the shape that root is wide, end is narrow, each pectination wing
Angle between the tooth root line of the tooth of the tooth root top line and lower end surface of the tooth of piece upper surface is 3-4 degree, and above-mentioned angle is combed
Middle line on shape fin thickness direction is divided equally, and it is angle that A is shown in Fig. 2, due to having the presence of above-mentioned angle, fin upper and lower side
The tooth top of each tooth on face is not in the case of fig. 1 actually on sustained height, and this design method is in recuperated gas
It is very beneficial for the raising of heat exchange efficiency when flowing in the gap between two fins；In the present embodiment, described two and half
It is 61 ± 0.5mm that round casing, which combines and to form the outer diameter that outer surface is circular aluminium inserts, and two semicircle shells are not combed
The wall thickness at shape fin position is 2mm ± 0.1mm；The line of from two semicircle shell binding sites of each fin medial end portions is maximum
It is more than or equal to a distance from be less than or equal to 20mm, line of each fin medial end portions from two semicircle shell binding sites is the smallest
6mm。
Using the design of the utility model, the fin ratio of heat exchanger tube is between 5.7-5.8, but its heat exchange efficiency is common
6 times or so of light pipe, the gap design for fin thickness, angle and each fin bracket that the utility model uses, inside pipe
Circulation passage segmentation is more reasonable, and flue gas can form more uniformly distribution and flowing, and inside pipe wall in each fin clearance
Fin it is smaller to the resistance of flue gas, if fin amount increase or increase thickness, although increasing heat exchange area, its flow resistance
Power also or increase, through test heat exchanger effectiveness can decrease instead, also carried out using the gap size difference between each fin
Test, it was demonstrated that its heat exchanger effectiveness can also reduce, this may be due to high-temperature flue gas in fluid interchange heat exchanger tube length or
Caused by Temperature Distribution radially is inconsistent.
After the embodiments of the present invention is described in detail, one of ordinary skilled in the art is clearly understood that,
Various change and modification can be carried out by not departing under above-mentioned claim and spirit, all according to the technical essence of the utility model
Any simple modification, equivalent change and modification to the above embodiments belong to the range of technical solutions of the utility model,
And the utility model is also not only restricted to the embodiment of example in specification.
Claims (5)
1. a kind of boiler inner fin heat exchange tube, the heat exchanger tube includes steel outer tube, and it is embedding that circular aluminium is embedded in steel outer tube
Part is made of two semicircle shells with pectination fin on the aluminium inserts circular section, and described two with pectination fin
Integrally be provided with multiple fins in semi circular shells body in cambered surface, multiple fins form pectination fins, two with pectination fin half
It is circular aluminium inserts that round casing, which is combined and to be formed external, and the described two semicircle shells with pectination fin are respectively half
Round casing one, semicircle shell two, the number of fins on the semicircle shell one is than semicircle shell more than 2 one, semicircle shell two
On each fin be plugged in the gap of two adjacent fins on semicircle shell one, it is characterised in that: when two semicircles
When the line of shell binding site is vertical direction, there is one section of youngster or whole from root to end on the upper and lower end face of each fin
For continuous dentation, root refers to that the position that fin is connect with semicircle shell one or semicircle shell two, end refer to the opposite end of root,
After two semicircle shells combine, on the tooth root line of each tooth in any one fin lower ends face and the fin being located under it
Gap between the tooth root line of each tooth of end face is identical, and the middle line in each fin thickness direction is horizontal direction and any two wing
The distance between the middle line of piece thickness direction is equal, and each fin is the shape that root is wide, end is narrow, each fin upper surface
Tooth tooth root line and lower end surface tooth tooth root line between angle be 3-4 degree, above-mentioned angle is by fin thickness direction
On middle line divide equally, the fin number on the semicircle shell one is six, and six fins are two-by-two about the height of semicircle shell one
The middle line in direction is symmetrical, and the fin number on semicircle shell two is five, and the thickness of fin is located in the middle in five fins
The middle line in direction is overlapped with two short transverse middle line of semicircle shell, and four additional pectination fin is two-by-two about two height of semicircle shell
Direction middle line is symmetrical.
2. a kind of boiler inner fin heat exchange tube according to claim 1, it is characterised in that: two semicircle shells
Combining and forming the outer diameter that outer surface is circular aluminium inserts is 61 ± 0.5mm, and two semicircle shells do not have fin position
Wall thickness be 2mm ± 0.1mm.
3. a kind of boiler inner fin heat exchange tube according to claim 2, it is characterised in that: two semicircle shells are integrated to one
After rising, the distance between middle line of two adjacent fins thickness direction is 5 ± 0.5mm.
4. a kind of boiler inner fin heat exchange tube according to claim 2, it is characterised in that: each fin end portion thickness
For 2mm ± 0.2mm, the continuous dentation does not extend to fin end portion, and fin end portion does not have the length of dentation to be more than or equal to
1mm。
5. a kind of boiler inner fin heat exchange tube according to claim 2, it is characterised in that: when two semicircle shell engaging portions
When the line of position is vertical direction, be less than with a distance from line of each fin medial end portions from two semicircle shell binding sites is maximum etc.
In 20mm, 6mm is more than or equal to a distance from line of each fin medial end portions from two semicircle shell binding sites is the smallest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820786022.9U CN208223269U (en) | 2018-05-25 | 2018-05-25 | A kind of boiler inner fin heat exchange tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820786022.9U CN208223269U (en) | 2018-05-25 | 2018-05-25 | A kind of boiler inner fin heat exchange tube |
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| Publication Number | Publication Date |
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| CN208223269U true CN208223269U (en) | 2018-12-11 |
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| CN201820786022.9U Active CN208223269U (en) | 2018-05-25 | 2018-05-25 | A kind of boiler inner fin heat exchange tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905230A (en) * | 2022-04-28 | 2022-08-16 | 沈阳东方钛业股份有限公司 | Inner finned tube and processing method thereof |
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2018
- 2018-05-25 CN CN201820786022.9U patent/CN208223269U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905230A (en) * | 2022-04-28 | 2022-08-16 | 沈阳东方钛业股份有限公司 | Inner finned tube and processing method thereof |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lu Haigang Inventor after: Xing Zhenbo Inventor after: Wu Yanli Inventor before: Lu Haigang Inventor before: Ren Huijun Inventor before: Chen Yuanyuan Inventor before: Xing Zhenbo Inventor before: Wu Yanli |