CN202109805U - Elliptical spiral heat exchange tube - Google Patents
Elliptical spiral heat exchange tube Download PDFInfo
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- CN202109805U CN202109805U CN 201120191742 CN201120191742U CN202109805U CN 202109805 U CN202109805 U CN 202109805U CN 201120191742 CN201120191742 CN 201120191742 CN 201120191742 U CN201120191742 U CN 201120191742U CN 202109805 U CN202109805 U CN 202109805U
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- heat exchange
- tube
- oval
- exchange tube
- spiral heat
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Abstract
The utility model discloses an elliptical spiral heat exchange tube, which at least comprises a tube body. The tube body is encircled to form a medium channel, and the tube body is provided with an elliptical cross section and a spiral outer surface. The elliptical spiral heat exchange tube is low in cost, convenient in manufacture and applicable to high-efficiency heat exchangers or heat exchange equipment in various industries such as petroleum, chemical engineering, chemical fertilizers, boilers, pharmacy, food, electric power, nuclear energy, environmental protection, heat supply and the like.
Description
Technical field
The utility model relates to the metal tube processing technique field, relates in particular to a kind of oval spiral heat exchange tube that is used for heat transmission equipments such as heat exchanger.
Background technology
Press GB/T24590-2009 " special tube for high-efficiency heat exchanger " standard, the existing heat exchanger of China uses efficient special type pipe to be divided into to be four major types, to be respectively T-slot pipe, bellows, interior ripple male-pipe, interior barrel.Their maximum common ground are: all be to go up at metal parent tube (straight collimator) through cold machining process to make the heat exchanger tube that processes.
As shown in Figure 1, T-slot pipe of the prior art forms intensive helical form T connected in star 11 through cold working on the outer wall of metal parent tube 1.The T-slot pipe can be divided into by version: I type, the T-shaped conduit of pipe outer wall, inside pipe wall smooth surface; The II type, the T-shaped conduit of pipe outer wall, the inside pipe wall surface is corrugated.
As shown in Figure 2, bellows of the prior art forms the heat exchanger tube that the inside and outside surface of pipe all is corrugated 11 through cold working on metal parent tube 1.
As shown in Figure 3, of the prior art in the ripple male-pipe, on metal parent tube 1, form the pipe outer wall and be the heat exchanger tube that screw thread 11, inside pipe wall are corrugated 12 through cold working.
As shown in Figure 4, of the prior art in barrel, at the inwall of metal parent tube 1 heat exchanger tube through cold working formation groove 11.Interior barrel can be divided into by version: I type, axial notch; The II type, helical groove.
Above-mentioned four big types of heat exchanger tubes are compared with the metal straight collimator that directly is used as heat exchanger tube without cold working; Because on the metal parent tube, have the formed flute profile of cold working, waveform etc.; Strengthened heat-transfer effect; Therefore the heat exchange area and the heat exchange efficiency of heat exchanger tube have been improved effectively, so be called as heat exchanger with " efficiently " heat exchanger tube.
Above-mentioned these four big types of heat exchanger tubes all pass through cold-formed as parent tube with the seamless metal straight collimator, its cold machining process mainly is that the seamless metal straight collimator is done shape variation.Further, these four big types of heat exchanger tubes all are on the inside and outside wall of seamless metal straight collimator, to carry out cold working, and the processing amplitude is limit by pipe thickness, therefore are difficult to improve significantly heat exchange area again.
Heat exchanger tube of the prior art is when doing heat exchange, and heat transferring mediums such as water, oil, gas circulate in heat exchanger tube, by means of the technical purpose of heat-shift between other media that the heat exchange tube wall is realized and heat exchanger tube is outer.In heat exchanging process, more abundant near the heat exchange that heat transferring medium carried out in heat exchanger tube tube wall zone, heat exchange efficiency is higher; And away from the heat exchanger tube tube wall, be positioned at the heat exchange of heat transferring medium of heat exchanger tube central area and insufficient, though above-mentioned heat exchanger tube therefore of the prior art improves through certain, whole heat exchange efficiency is still lower.
And, some tangible deficiency below heat exchanger tube of the prior art also exists in production, use:
1, be limited by the specification limits of cold working equipment, the heat exchanger tube finished product all receives great limitation at aspects such as specification, length;
2, because the cold working step is arranged, raw-material loss is bigger;
3, because the cold working process is complicated, cause the machining accuracy of product uneven;
4, the method for inspection of cold machining process and measuring means are difficult to guarantee end product quality;
5, limited by processing technology, tubulation efficient is not high;
6, these four big types of heat exchanger tubes have special external form mostly, and the making of giving heat exchange equipment brings many inconvenience such as the disposal to the deflection plate of bellows, outer barrel;
7, these four big types of heat exchanger tubes all pass through cold working, have residual stress on the body, medium through the time can form turbulent flow, strengthened the local corrosion of heat exchanger tube, so caused certain negative effect the service life of heat exchanging device equipment.
Heat exchanger tube of the prior art has got into a technical bottleneck for above-mentioned reasons, and heat exchange area, heat exchange efficiency are difficult to increase substantially again, have restricted the development of heat exchanger, are difficult to satisfy the demand in market.
Therefore, those skilled in the art is devoted to develop high, the simple in structure heat exchanger tube of a kind of heat exchange efficiency always.
The utility model content
Because the above-mentioned defective of prior art, the utility model technical problem to be solved provides the high oval spiral heat exchange tube of a kind of heat exchange efficiency.
For realizing above-mentioned purpose, the utility model provides a kind of oval spiral heat exchange tube, comprises body at least, and said body surrounds and forms a medium channel; Said body has oval cross section.
Preferably, the inner surface of said oval cross section is formed by oval surface.
Preferably, said oval cross section is the continuous cold rolling machined surface that said body obtains through press process.
Preferably, the two ends of said body have straight length respectively.
Preferably, said body is the metal welded tube.
Preferably, said medium channel is oval.
The oval spiral heat exchange tube of the utility model adopts oval-shaped cross section; The middle heat transfer zone that cross-sectional area in the prior art is bigger is dwindled; Approaching or identical with the cross-sectional area of peripheral heat transfer zone; Improve the heat exchange efficiency of middle heat transfer zone in the medium channel, thereby improved the heat exchange efficiency of whole oval spiral heat exchange tube.
Therefore the oval spiral heat exchange tube of the utility model is roughly the several times of existing heat exchanger tube on whole heat exchange efficiency, be much higher than existing heat exchanger tube.
It is raw material that the utility model also adopts welded tube first, and the cost of welded tube is lower at least by about 20% than the cost that is used as the raw-material seamless pipe of heat exchanger tube in the prior art, thereby the utility model has reduced the manufacturing cost of heat exchanger tube significantly.
The oval spiral heat exchange tube of the utility model; Have simple in structure; Cost is low, makes beneficial effects such as facility, is applicable to the pipe of using that is used as high-performance heat exchanger or heat transmission equipment in the multiple industries such as oil, chemical industry, chemical fertilizer, boiler, pharmacy, food, electric power, nuclear energy, environmental protection, heat supply.
The utility model also provides the online tubulation processing technology of above-mentioned arbitrary oval spiral heat exchange tube, may further comprise the steps at least: step 1 obtains a metal circular tube; Step 2 is placed into the roller machine with said metal circular tube; Step 3, receive a series of oval spiral pressing mold extruding after, said metal circular tube forms non-circular cross-section, obtains said oval spiral heat exchange tube.
Preferably, in the said step 1, said metal circular tube is a welded tube.
Preferably, the inner surface of said oval cross section is formed by oval surface.
Preferably, said oval cross section is the continuous cold rolling machined surface that said metal circular tube obtains through press process.
Oval mould in the utility model must be considered factor when design:
1, should not leave the existence of sharp comer in the structural design of oval spiral mould, concentrate the tube wall crackle that causes to prevent the existing in use stress of heat exchanger tube.
2, oval tube wall will be complementary with the diameter and the wall thickness of heat exchanger tube.
3, ellipse will adapt with DESIGN OF NON ADIABATIC and instructions for use.
4, the best heat exchange area of increase heat exchanger tube and heat exchange efficiency are the starting points of oval spiral mould design.
The oval spiral heat exchange tube of the utility model, its online pressing process should be followed following requirement: 1, the target level of product quality of oval spiral heat exchange tube should strictly be implemented with the welding tube quality standard-required by associated heat exchanger; 2, necessary 100% EDDY CURRENT of the weld seam of oval spiral heat exchange tube is qualified, and 100% water pressure test is qualified; 3, oval spiral heat exchange tube should carry out the high tempering typing, is strictly on guard against the shape of product resilience; 4, oval spiral heat exchange tube should be eliminated heat treatment extruding residual stress through online heat treatment; 5, the online compacting tool set of oval spiral heat exchange tube should have the unlatching closure function, can leave sufficiently long round light pipe section at the welded tube two ends according to customer demand, in order to the heat exchanger tube manufacturing; 6, the surfaces externally and internally of oval spiral heat exchange tube abnormity position does not all have sharp comer or corner angle existence.
Heat exchange tube machining technique is compared in the utility model and the prior art; Owing to there is not a large amount of cold working operations; Need not a large amount of cold working operations place, special cold working equipment and professional technique workman, saved investment cost and manufacturing cost, thereby reduced the production cost of heat exchanger tube significantly; Improve manufacturing efficient, had the stable machining quality.
Owing to there is not cold working; The oval spiral heat exchange tube of the utility model has significantly reduced raw-material consumption; Also owing to do not have a large amount of cold worked residual stress and more smooth interior appearance, oval spiral heat exchange tube resistance to corrosion of the utility model and resistive connection dirt ability obviously are superior to the product that existing technology is produced.
Because a large amount of raw material that use welded tube as oval pipe, the production cost of welded tube itself just reach 20% than seamless pipe is low.Also owing to effective performance of welded tube inherent characteristic, the oval size of its heat exchanger tube can be several times as much as the special type pipe of producing with seamless pipe, and its heat exchange area and heat exchange efficiency are much higher than " the effective special type pipe of high efficient heat exchanging ".
Compare with hot jacket tubulation processing technology, the utility model has reduced the secondary operations flow process of welded tube, has save the outer Equipment for Heating Processing of line of hot jacket processing; Because on-line continuous production operation; Its production efficiency is approximately nearly ten times of existing technologies, makes the tubulation cost cheaper, and tubulation efficient is faster.
And online tubulation also has incomparable advantage aspect the length of finished product.Because online tubulation be continuously processing, in theory, as long as be aided with a follow-up cutting work step, the oval spiral heat exchange tube that online tubulation is produced the utility model of acquisition can satisfy client's all lengths requirement.
Because automatic control, constant product quality, the accurate to dimension of online assignment production are higher than existing handicraft product quality level.
The utility model and existing special tube for high-efficiency heat exchanger process technology from the tubulation apparatus cost relatively, existing heat exchanger tube production must have special machined, cold working equipment.And the utility model only need be on existing tubulation apparatus be done simple transformation to mould etc., increases the oval spiral pressing molds of many groups, just can online compacting form desired various oval pipes.Through online heat treatment mechanism, eliminate the residual stress of oval spiral heat exchange tube on-line machining, to increase ability to stress corrosion resistant; Through online heat treatment mechanism, eliminate the deformation resilience of oval spiral heat exchange tube simultaneously, obtain dimensionally stable, the oval spiral heat exchange tube of physical dimension requirement up to specification.
Therefore, the utility model has reduced the investment in factory building and place, has reduced investment, the place area occupied need not enlarge; Instant effect; Beneficial effects such as production efficiency height, its production efficiency are approximately the several times of existing technology, are much higher than the processing technology of existing heat exchanger tube.
Description of drawings
Fig. 1 is the structural representation of a kind of T-slot pipe in the prior art;
Fig. 2 is the structural representation of a kind of bellows in the prior art;
Fig. 3 is the structural representation of a kind of interior ripple male-pipe in the prior art;
Fig. 4 is the structural representation of a kind of interior barrel in the prior art;
Fig. 5 is the cross-sectional structure sketch map of embodiment 1 of the oval spiral heat exchange tube of the utility model;
The outer surface structure sketch map of Fig. 6 Fig. 5;
Fig. 7 is the compacting flow sheet equipment sketch map of the utility model middle tube body.
The specific embodiment
Below will combine accompanying drawing that the technique effect of design, concrete structure and the generation of the utility model is described further, with purpose, characteristic and the effect of understanding the utility model fully.
Embodiment 1:
As shown in Figure 5, the oval spiral heat exchange tube 1 of the utility model is one to have the metal welded tube of certain-length, like austenitic stainless steel welded tube, carbon steel welded tube, titanium or titanium alloy welded tube, nickel and nickel alloy welded tube, or austenite-ferrite dual phase steel welded tube etc.
Shown in Figure 5 is its shape of cross section, and the inner surface of body 2 is a smooth surface.As shown in Figure 6, the outer surface of body 1 is a spirality.
The inside of body 2 forms the medium channel 3 of heat transferring medium circulation.
Among this paper, described " roughly the same " not strict identical.As long as the cross-sectional area of heat transfer zone 32 is not more than 3 times of cross-sectional area of side heat transfer zone 31 in the middle of making, or be not less than 1/3 the getting final product of cross-sectional area of side heat transfer zone 31.
Particularly, the body 2 in the present embodiment is to adopt press process technology to form by a circular metal welded tube, and ellipsoid is the continuous cold rolling machined surface that body 2 obtains through press process.
The corner of circular arc will have certain radian, and according to the difference of body 2 diameters, preferably adopting knuckle radius is the 2-10 millimeter.Avoided the existence of sharp comer like this.
See from shape of cross section; The inner surface of present embodiment middle tube body 2 is to be formed by oval surface; Oval spiral heat exchange tube 1 like this is when doing heat exchange; The heat exchange efficiency of two end periphery heat transfer zone 31 and a middle heat transfer zone 32 is all than higher, and the heat transferring mediums in the particularly middle heat transfer zone 32 also participate in the heat transfer process fully, have improved the heat exchange efficiency of oval spiral heat exchange tube 1 widely.
Like the body in the present embodiment 2, its beneficial effect is, not only can improve the heat exchange area of oval spiral heat exchange tube 1 significantly, has improved the heat exchange efficiency of oval spiral heat exchange tube 1; Can also strengthen the flow and the flow velocity of heat transferring mediums in the middle heat transfer zone 32, also improve the heat exchange efficiency of oval spiral heat exchange tube 1.
The oval spiral heat exchange tube of the utility model is not also owing to have cold working after the tubulation moulding, so internal structure stress eliminates basically, and anti-fouling tendency, corrosion resistance are better.
According to client's needs, the entire length of the oval spiral heat exchange tube of the utility model can be chosen between ten several meters at 0 meter.Certainly, if the reasonable disposition heat-treatment furnace, the entire length of the oval spiral heat exchange tube of the utility model can also be in random length, and is not subject to the specification of cold working equipment.
Embodiment 2:
The oval spiral heat exchange tube of present embodiment and the structure of the foregoing description are basic identical, all comprise a body, and institute's difference is in the present embodiment, at the two ends of body, also to have straight length respectively.Straight length and ellipse spiral section are answered rounding off, can not sharply be out of shape.
Having straight length gets oval spiral heat exchange tube and in the assembling of heat transmission equipment processing, has better assembling and sealing property.
The oval spiral heat exchange tube 1 of the utility model, its online tubulation processing technology comprises at least:
In the present embodiment, body 2 is the metal welded tube, and its cross section inside is formed by oval surface.In conjunction with shown in Figure 7, body 2 obtains through press process technology.
Press device mainly comprises a series of support 401,402,403, is respectively arranged with top roll 411,412,413 and lower roll 421,422,423 on each support, also is respectively arranged with a series of left roller, right roller (not shown) in the both sides of body 2.All be provided with on each Kun or be formed with a series of progressively the distortion oval spiral pressing molds, all have spiral lines on these oval pressing molds.
Through progressively distortion of four sides extruding, obtain oval-shaped helical tube body 2.
Press in the process of arc shaping at body 2, corner has been avoided the existence of sharp comer.
In other embodiments, can also make two ends end face and its axis normal of oval spiral heat exchange tube, and remove the otch burr through a spot of cold working.
In other embodiments, can also the both ends of body be reserved as straight length.
The main body of on-line machining equipment is a prior art, just according to the shape needs of oval spiral heat exchange tube, has designed a series of oval spiral pressing mold according to conventional method.
Therefore the utility model can be used for processing the oval spiral heat exchange tube among the arbitrary embodiment of the utility model, all has identical beneficial effect.
In sum, the just several kinds of preferred embodiment of the utility model described in this specification, above embodiment is only unrestricted in order to the technical scheme of explanation the utility model.All technical staff in the art according to the design of the utility model on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within the claim protection domain of the utility model.
Claims (6)
1. an oval spiral heat exchange tube comprises body at least, and said body surrounds and forms a medium channel; It is characterized in that: said body has oval cross section, and said body has helical outer surface.
2. oval spiral heat exchange tube as claimed in claim 1 is characterized in that: the inner surface of said oval cross section is formed by oval surface.
3. oval spiral heat exchange tube as claimed in claim 2 is characterized in that: said oval cross section is the continuous cold rolling machined surface that said body obtains through press process.
4. oval spiral heat exchange tube as claimed in claim 1 is characterized in that: the two ends of said body have straight length respectively.
5. like the arbitrary described oval spiral heat exchange tube of claim 1 to 4, it is characterized in that: said body is the metal welded tube.
6. like the arbitrary described oval spiral heat exchange tube of claim 1 to 4, it is characterized in that: said medium channel is for oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120191742 CN202109805U (en) | 2011-06-08 | 2011-06-08 | Elliptical spiral heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120191742 CN202109805U (en) | 2011-06-08 | 2011-06-08 | Elliptical spiral heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202109805U true CN202109805U (en) | 2012-01-11 |
Family
ID=45435243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120191742 Expired - Fee Related CN202109805U (en) | 2011-06-08 | 2011-06-08 | Elliptical spiral heat exchange tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202109805U (en) |
-
2011
- 2011-06-08 CN CN 201120191742 patent/CN202109805U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG BAIJI SPECIAL MATERIALS TECHNOLOGY CO., L Free format text: FORMER OWNER: SHANGHAI KEMI STEEL TUBE CO., LTD. Effective date: 20120704 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201611 NO.69, JINGCHE ROAD, CHEDUN TOWN, SONGJIANG DISTRICT, SHANGHAI CITY TO: 317016 SHANGPANBEIYANG PARK, LINHAI CITY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120704 Address after: 317016 Beiyang park on the north wall of Linhai City, Zhejiang Province Patentee after: Zhejiang instrument Material Technology Co., Ltd. Address before: 201611 Shanghai Songjiang District Chedun Town Road No. 69 Jing Patentee before: Shanghai Kemi Steel Tube Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20140608 |