CN108431538A - Shell-and-tube heat exchanger, the finned tube for this heat exchanger and corresponding method - Google Patents

Shell-and-tube heat exchanger, the finned tube for this heat exchanger and corresponding method Download PDF

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Publication number
CN108431538A
CN108431538A CN201680074849.0A CN201680074849A CN108431538A CN 108431538 A CN108431538 A CN 108431538A CN 201680074849 A CN201680074849 A CN 201680074849A CN 108431538 A CN108431538 A CN 108431538A
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CN
China
Prior art keywords
fin
heat exchanger
pipe fitting
shell
advancing angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201680074849.0A
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Chinese (zh)
Inventor
M·洛特利
M·加拉瓦利亚
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Bram Ba Bernard And Lorry Ltd
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Bram Ba Bernard And Lorry Ltd
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Application filed by Bram Ba Bernard And Lorry Ltd filed Critical Bram Ba Bernard And Lorry Ltd
Publication of CN108431538A publication Critical patent/CN108431538A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1607—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

A kind of vertical flow tube shell type heat exchanger, including accommodating shell 101, first fluid flows while the longitudinal axis of the shell 101 can be arranged essentially parallel in the receiving shell 101, the receiving shell 101 houses a branch of pipe fitting 2 and multiple lattice-shaped baffles 102 inside it, pipe fitting 2 is essentially parallel from one to another and is parallel to the longitudinal axis of the shell 101, the multiple lattice-shaped baffle 102 extends substantially transversely to the longitudinal axis of the shell 101 to support the pipe fitting 2, second fluid to be flowed in a branch of pipe fitting 2.The pipe fitting 2 is provided with multiple low fins 21 at least part of its outer surface, the low fin 21 is spirally set to the first advancing angle α on the outer surface of the pipe fitting 2, and the profile of the low fin is interrupted by the spiral grooves 22 with the second advancing angle β, wherein α ≠ β.

Description

Shell-and-tube heat exchanger, the finned tube for this heat exchanger and corresponding method
Technical field
The present invention relates to a kind of shell-and-tube heat exchanger, a kind of particularly shell-and-tube including certain types of finned tube Heat exchanger.On the other hand, the present invention relates to a kind of methods for manufacturing the finned tube for being provided with specific fin system.
Background technology
The heat exchanger of shell-and-tube is the industrial heat exchange device of known type, and substantially by being located at usually columnar appearance The tube bank composition received in shell (shell).In operating conditions, two kinds of fluids flow through heat exchanger：First fluid --- it is preferably It is hotter or more corrosivity or there is higher sealing factor --- in Bottomhole pressure (" pipe side " flow), and second fluid exists Flowing in the space defined by the inner surface of shell and the outer surface of pipe fitting (" shell-side " flows).
The whole transverse baffle made of metal sheet (" partition board ") is generally disposed at enclosure, has support tube bank And turbulent flow is generated in the fluid on shell-side to increase the dual purpose of heat transfer coefficient.
With reference to Fig. 3, transverse baffle is made of the sheet metal plate for occupying a part for the inner section of heat exchanger 10, to Generate the zigzag path (as shown by the arrow in Figure 3) of shell-side upper fluid so that there is the vertical of the axis relative to heat exchanger 10 To component and especially cross stream component；Such baffle plate configuration is according to the routines of international TEMA criteria classifications Solution.
In longitudinal heat exchanger -- one example is in Fig. 1 of accompanying and shown in Figure 2(mesh gold Belong to baffle) heat exchanger of type -- in, fluid on shell-side is along being substantially the direction flowing of straight line (such as such as the arrow in Fig. 2 Shown in head) -- usually in a manner of with the reverse fluid flow on pipe side -- and it is arranged essentially parallel to the axial flow of heat exchanger 1.
Fluid stream on shell-side can also have spiral trend, for example, as shown in figure 4.In this case, by rushing A certain number of partition boards made of pressure grid are located in 100 inside of heat exchanger and obliquely position, so that shell-side upper fluid exists Heat exchanger 100 period rotary motion is advanced through, the screw generally of shell-side upper fluid is thus generated, in Fig. 4 Illustrated in arrow.
The typical problem encountered in the heat exchanger of conventional TEMA types be by the deposit of the solid material of fluid conveying, Or the deposit of the solid material on the dead angle on partition board or in the path of shell-side upper fluid is formed in by precipitation.Solid The deposit of material can cause heat transfer coefficient to reduce, so as to cause the reduced performance of heat exchanger.Additionally, there are be deposited on heat exchanger Internal solid material may lead to being unevenly distributed for shell-side upper fluid stream, and the performance of heat exchanger therefore may be caused to dislike Change.
In heat exchanger, particularly in the field of heat exchangers of industrial type, increased using the pipe fitting for being provided with surface fin Heat exchange surface is known.In the case of shell-and-tube heat exchanger, according to whether enhance performance on shell-side or pipe side, Fin can be equipped on the outer surface of pipe fitting or its inner surface.On other occasions, it can use on both surfaces Finned tube.
In conventional heat exchanger (across primary jet with type shown in Fig. 3), usually used fin is transverse to pipe fitting Setting, so that the heat exchange with the principal component of shell-side upper fluid stream maximizes.In vertical flow tube shell type heat exchanger (institute in Fig. 1 and Fig. 2 Show the heat exchanger of type) in, the efficiency of the transverse fin (that is, its α=90 ° advancing angle (angle of advancement)) It can reduce instead.
It is also known that the advancing angle for also having the pipe fitting or fin that are provided with spiral fin have along relative to pipe Component (the α of the longitudinal direction of part axis<90 °) pipe fitting.
The method for manufacturing the pipe fitting with spiral fin being currently known makes spiral shell using the combination of several tools The quantity for revolving shape fin maximizes.However, the characteristic depending on the material for manufacturing pipe fitting, for manufacturing the known of finned tube Technology is restricted in its application aspect, therefore limits the range for the material that can process fin on it.
In fact, in the case where there is the compo pipe with higher mechanical strength (i.e. stainless steel and dual phase steel), in shape At being acted on during fin between longitudinal force component on pipe fitting may be unevenly distributed over tool, and the longitudinal direction force component The material caused by tool serial action causes to have due to gradually harden the tool of maximum load in the fabrication process to outside profile Side conventionally slides.This leads to tool damage and needs to be replaced frequently tool, so as to cause tool direct cost in terms of damage It loses and is caused due to machine stoppage under production.
Hardening effect makes when there are steel alloy (stainless steel or the steel of higher intensity), even if not can not possibly but Be difficult to obtain the assigned altitute of fin, in order to make the hardening effect minimize, pipe fitting usually two continuous process operations it Between anneal, to significantly increase pipe fitting production process cost.
Invention content
Based on these considerations, main target of the invention, which is to provide, a kind of solving the problems, such as that the shell-and-tube of drawbacks described above sum changes Hot device.
In the range of this target, has the purpose of the present invention is to provide a kind of heat exchanger relative to known type and change Into performance vertical flow tube shell type heat exchanger.
Another object of the present invention is to provide a kind of vertical flow tube shell type heat exchangers, wherein relative to usual heat exchanger and Speech, the heat transfer coefficient of per unit pressure drop, the particularly heat transfer coefficient of the per unit pressure drop on shell-side increase.
Another object of the present invention is to provide a kind of vertical flow tube shell type heat exchanger, wherein relative to usual heat exchanger and The heat transfer coefficient of speech, shell-side and the per unit pressure drop in the two of pipe side increases.
Another object of the present invention is to provide a kind of for heat exchanger, is particularly used for the fin of shell-and-tube heat exchanger Pipe, the finned tube can improve the performance of heat exchanger.
Another object of the present invention is to provide a kind of methods for manufacturing finned tube, even if in the pipe fitting by having In the case of made of the material of high mechanical properties, this method also allows for producing equipped with helical fin (α<90 °) pipe fitting.
The another object of subject of the present invention is to provide a kind of vertical flow tube shell type heat exchanger and a kind of for heat exchanger Finned tube, the finned tube is highly reliable and is easy to manufacture with competitive cost.
The target and these and other purposes that hereinafter will become apparent from pass through vertical flow tube shell type heat exchanger It realizes, which includes accommodating shell, and first fluid can be arranged essentially parallel to institute in the holding shell body It flows with stating the longitudinal axis of shell；The receiving shell accommodates a branch of pipe fitting and multiple lattice-shaped baffles inside it, described Pipe fitting is essentially parallel from one to another and is parallel to the longitudinal axis of the shell, and the multiple lattice-shaped baffle extends substantially transversely to described The longitudinal axis of shell is to support the pipe fitting, a branch of pipe fitting to be suitable for that second fluid is made to flow wherein；According to this hair Bright heat exchanger is characterized in that, the pipe fitting is provided with multiple low fins in at least part on surface on the outside, described Low fin is spirally set to the first advancing angle α on the outer surface of the pipe fitting, and the profile of the low fin is by having The spiral grooves of second advancing angle β are interrupted, wherein α ≠ β.
In fact, have been noted that the vertical flow tube shell type heat exchanger so conceived have allow to solve the problems, such as disadvantages mentioned above and Series of features and property.
Particularly, have been observed that the presence of helical fin allows heat transfer coefficient on shell-side to increase considerably, to improving The performance of heat exchanger.
The fracture or discontinuities being present in due to the spiral grooves processed as described below in fin profile So that generating three-dimensional surface, which further increases heat transfer area relative to initial fin.The final table obtained Face is 3.0 to 4.0 times bigger than initial smooth pipe fitting, it might even be possible to reach 4.5 times.
In addition, as following article is preferably explained, due to the ad hoc approach for manufacturing finned tube, this method is also formed Subject of the present invention can use made of the material with high mechanical properties finned tube in the heat exchanger of the present invention, The material with high mechanical properties is, for example, the steel alloy of such as corronil, stainless steel, dual phase steel or titanium steel etc, these Material is crucial for the above reasons.
In fact, so far, pipe fitting is provided with, particularly by the material system with high mechanical properties there are no known At pipe fitting vertical flow tube shell type heat exchanger, wherein low helical fin is provided on the outer surface of the pipe fitting.
For the purposes of the present invention, term " low fin " means that height H is less than about 2mm and is preferably ranges between Fin between 0.5mm and 1.5mm.
The advancing angle α of fin is usual<80 °, and preferably 15 °≤α≤60 °, more preferably 20 °≤α≤45 °, the latter Being can be by the optimum range that can obtain the best compromise between fin height and density of experimental verification.
It is preferably described in following article, by making pipe fitting experience with different advancing angle execution and sequentially adjacent two Secondary fin machining operation, can obtain the discontinuities in fin profile.
First groove process operation is carried out to pipe fitting using the first fin machining/groove processing tool, which adds Work operation processes the fin with advancing angle β, which has compared with low depth, it is therefore preferred to have the depth of≤0.5mm, with limit The hardening of prepared material.The second main fin machining operation is carried out on the pipe fitting so slotted, to process the reality with advancing angle α Border fin.
In this way, main fin is processed on the surface with spine and groove.This method utilizes first The advancing angle and the angle of pitch of fin/groove processing tool and main fin machining tool so that the processing of main machining tool the result is that Increase the height of finished product fin for the fin height obtained since normal round smooth surface.
Particularly, main fin machining is operated along the longitudinal axis relative to pipe fitting with angle [alpha]2Inclined plane carries out, and Fin/groove processing operation is along the longitudinal axis relative to pipe fitting with angle [alpha]1Inclined plane carries out.Two processing plane it Between maximum incrementss of the relative angle (anterior angle (rake angle)) based on obtainable fin height with it is obtainable along wing Compromise in the per unit length that the longitudinal axis of piece measures between the maximum quantity of discontinuities is selected.
Therefore, anterior angle is between 0 ° (maximum height incrementss and portion free of discontinuities) and 90 ° (between minimum constructive height incrementss and maximum Disconnected effect) between.As needed, it is preferable that anterior angle is between 30 ° and 60 °.In this way, it can both obtain final Increase of the height of fin for single process operation, while desired interruption can also be obtained.
The fact that two grooves/fin machining operation is almost carried out at the same time makes it possible to the influence that will be hardened minimum -- and it is no The increased result of height for then obtaining the fin with steel alloy (stainless steel and the steel of higher intensity) will be extremely difficult -- and It need not anneal as described above to pipe fitting between two continuous process operations, above-mentioned annealing operation can cause into This increase.
In shell-and-tube heat exchanger according to the present invention, the phase between the first advancing angle α and the second advancing angle β Angle is preferably ranges between 0 ° and 90 °, and more preferably between 30 ° and 60 °.
Therefore obtainable intermittent fin can extend or in the portion with random length in the whole surface of pipe fitting Divide upper extension, and rest part is made to keep smooth.This characteristic using with U-bend pars convoluta pipe fitting when be it is useful, with Just will not weakened curved part, in a particular application keep bending part mechanical strength.
In the case of the vertical flow tube shell type heat exchanger of type, since smooth part is conducive to baffle Stable position, therefore the characteristic is particularly useful；Therefore, vertical flow tube shell type heat exchanger according to the present invention can be advantageously provided with Band finless parts and the alternately arranged pipe fitting of smooth part.
In order to improve the heat transfer coefficient on pipe side, shell-and-tube heat exchanger according to the present invention, which is advantageously provided with, to be equipped with There are the pipe fitting of inner fins, the inner fins to be obtained by processing groove on an internal surface.
In another aspect of the invention, include the first work package and at least one the invention further relates to a kind of use The machine of support component is come the method that manufactures finned tube.First work package includes the first rotation being sequentially arranged in same drive shaft Turn fin/groove processing tool and the second rotating fins machining tool.First rotating fins/groove processing tool is provided with have First advancing angle α1The first spiral shape working profile, the second rotating fins machining tool is provided with the second advancing angle α2's Second spiral shape working profile, wherein α2≠α1。
Include that the pipe fitting is made to advance in the plane limited by the support component according to the method for the present invention, by means of First rotary machining tool forms first (interim) fin/groove on the pipe fitting, rotates work by means of described second Tool forms second (master) fin on the pipe fitting, the formation of second fin follow closely in first fin formation it Afterwards；In addition, the height of first fin is usually less than the height of second fin.
It is parallel to pipe fitting in the drive shaft of the first rotating fins/groove processing tool and the second rotating fins machining tool Longitudinal axis it is more conventional in the case of, the first advancing angle α1Will have with the second of described first (interim) fin/groove before Into the identical value of angle beta, and the second advancing angle α2There to be value identical with the first advancing angle α of described second (master) fin.
As described above, the first advancing angle α1With the second advancing angle α2Between relative angle (anterior angle) advantageously Between 0 ° and 90 °, and it is preferably ranges between 30 ° and 60 °.In addition, the first rotating fins/groove processing tool and Two rotating fins machining tools be advantageously shaped to so that first fin height h preferably≤0.5mm, and described the The height H of two fins preferably≤2mm.
Using method described herein obtain for heat exchanger, be particularly used for the finned tube of shell-and-tube heat exchanger also structure At subject of the present invention.
Particularly, finned tube of the invention is provided with multiple low fins at least part of its outer surface, described low Fin is spirally set to the first advancing angle α on the outer surface of the pipe fitting and with by the spiral shell with the second advancing angle β The intermittent profile of groove institute is revolved, wherein α ≠ β, the advancing angle α is preferably<80 °, and more preferably 15 °≤α≤60 °, institute The relative angle stated between the first advancing angle α and the second advancing angle β is preferably ranges between 0 ° and 90 °, and more preferably Ground between 30 ° and 60 °, the height H of the low fin preferably≤2mm, more preferably between 0.5mm between 1.5mm.
Description of the drawings
From the description of preferred but nonexcludability the embodiment to vertical flow tube shell type heat exchanger according to the present invention, these realities It applies example to show by the non-limiting example in attached drawing, other features and advantages of the present invention will become apparent from, attached In figure：
Fig. 1 shows the perspective view of vertical flow tube shell type heat exchanger；
Fig. 2 shows the schematic diagrames of vertical flow tube shell type heat exchanger；
Fig. 3 shows the schematic diagram of meander shell-and-tube heat exchanger；
Fig. 4 shows the schematic diagram of spiral flow tube shell heat exchanger；
Fig. 5 shows a part for the finned tube that can be used for vertical flow tube shell type heat exchanger according to the present invention；
Fig. 6 a schematically show the fin for the finned tube that can be used in vertical flow tube shell type heat exchanger according to the present invention Spiral trend；
Fig. 6 b schematically show the wing for making can be used for the finned tube in vertical flow tube shell type heat exchanger according to the present invention The spiral trend of the intermittent groove of profile of piece；
Fig. 7 a- Fig. 7 c show replacing for the fin for the finned tube that can be used in vertical flow tube shell type heat exchanger according to the present invention For the section of the profile of property；
Fig. 8 show can be used in vertical flow tube shell type heat exchanger according to the present invention with the smooth department being alternately arranged Point and finned tube with finless parts a part；
Fig. 9 is for implementing the signal according to the present invention for manufacturing the first embodiment of the machine of the method for finned tube Property side view；
Figure 10 is the schematic elevational view of the machine of Fig. 9；
Figure 11 a, which are schematically shown, to be formed by means of the method according to the present invention for manufacturing finned tube on pipe fitting First fin/groove；
Figure 11 b, which are schematically shown, to be formed by means of the method according to the present invention for manufacturing finned tube on pipe fitting Second (master) fin；
Figure 12 is according to the present invention for manufacturing showing for the second embodiment of the machine of the method for finned tube for implementing Meaning property side view；
Figure 13 is the schematic elevational view of the machine of Figure 12；
Figure 14 shows the schematic diagram of vertical flow tube shell type heat exchanger according to the present invention；
Figure 15 shows the details of the vertical flow tube shell type heat exchanger of Figure 14.
Specific implementation mode
Reference attached drawing,The vertical flow tube shell type heat exchanger of type includes holding in its more common embodiment Receive shell 101, first fluid can be flowed with accommodating the longitudinal axis that be arranged essentially parallel to the shell 101 in shell 101. A branch of pipe fitting 2 is located accommodating in shell 101, pipe fitting 2 is substantially parallel to each other and is parallel to the longitudinal axis of shell 101； Shell 101 also includes multiple lattice-shaped baffles 102 of the longitudinal axis transverse to the shell 101, and the baffle 102 supports institute State pipe fitting 2.
Referring specifically to Figure 14, second fluid is shown greatly inversely in the flow direction of the first fluid in shell 101 (referring to arrow The flowing in pipe fitting 2 of first direction (referring to arrow 210) 110).
With reference to Fig. 7, one of the specific characteristic of vertical flow tube shell type heat exchanger 1 according to the present invention is the pipe fitting 2 at it It is provided with multiple low fins 21 at least part of outer surface, the multiple low fin 21 is with the first advancing angle α spirally cloth It sets on the outer surface of the pipe fitting 2.Advancing angle α is usually less than 80 °, and is preferably ranges between 15 ° and 60 °, more excellent Selection of land is between 20 ° and 45 °.
Another profile for being uniquely characterized in that low fin 21 of vertical flow tube shell type heat exchanger 1 according to the present invention is by having The spiral grooves 22 of two advancing angle β are interrupted, wherein α ≠ β.
In order to illustrate more clearly of the feature of pipe fitting 2, fin and ditch are schematically shown in Fig. 6 a and Fig. 6 b Slot.Refer again to Figure 11 a, the first process segment of pipe fitting 2 make it possible to by the base portion of pipe fitting lower (measure h) and increase (with Identical amount h), to process the corrugated profile with spiral fin 22 and corresponding spiral groove, the spiral shape Fin and corresponding spiral groove have advancing angle β as shown in Figure 6b.Height h relative to base portion profile is preferably small In 0.5mm.
The second process segment of 1b referring now to fig. 1, pipe fitting 2 make it possible to by being carried out with advancing angle α (referring to Fig. 6 a) Screw processing operates the corrugated profile of the pipe fitting 2 to lower (measure H) and increase (H in the same amount) Figure 11 a to obtain Obtain final fin 21.
For the quantity of height and discontinuities, the final structure of fin 21 will therefore depend on the composition of two kinds of deformations, Depend specifically on the size and angle [alpha] and β of h and H.When the relative angle between α and β is close to 0 °, fin 21 will be obtained The maximum incrementss of height will obtain the fin 21 caused by groove 22 and when the relative angle between α and β is close to 90 ° Profile on discontinuities maximum quantity.
" shape " of fin 21 can be selected arbitrarily as needed.Fig. 7 a- Fig. 7 c show fin 21 some are possible Section, but it is not in any way limited to these embodiments.
It is alternately set on pipe fitting 2 in the preferred embodiment of vertical flow tube shell type heat exchanger 1 according to the present invention with reference to Fig. 8 It is equipped with band finless parts 20 and smooth part 200.In this way, Figure 15 is referred again to, it will help the stabilization of baffle 102 is fixed Position.
With reference to Fig. 9 and Figure 10, the first embodiment of the method for manufacturing finned tube 2 will now be described, wherein finned tube 2 are provided with multiple low fins 21 at least part of its outer surface.These fins 21 are spirally arranged with the first advancing angle α In on the outer surface and the profile of these fins 21 is interrupted by the spiral grooves 22 with the second advancing angle β.
It uses and is executed including work package 30 and the machine of at least one support component 40 3 according to the method for the present invention. First work package 30 includes the first rotating fins processing/32 He of groove processing tool being sequentially arranged in same drive shaft 33 Second rotating fins machining tool 31.Support component 40 includes two smooth surface cylindrical guides 34 and 36, the smooth table The purpose of face cylindrical guide 34 and 36 is to be held in place pipe fitting 2 during processing, to support work package 30 thrust load.
First rotating fins processing/groove processing tool 32 is provided with the first spiral shape working profile, first spiral shape The spiral grooves 22 generated on working profile and the outer surface for staying in pipe fitting 2 are symmetrical and have the first advancing angle α1。
Second rotating fins machining tool 31 is provided with the second spiral shape working profile, the second spiral shape working profile with It stays in the low fin 21 generated on the outer surface of pipe fitting 2 symmetrically and there is the second advancing angle α2, wherein α2≠α1。
According to the method for the present invention including making pipe fitting 2 advance in the plane limited by support component 40, and by means of First rotation tool 32 forms the first fin/groove 22 on the pipe fitting 2.Advantageously, the depth of the fin/groove 22 is preferred Ground is≤0.5mm to be to limit the hardening of material.
After forming the first fin/groove 22, immediately by means of the second rotating fins machining tool 31 described The second fin 21 (main fin) is formed on pipe fitting 2.The height of the second main fin 21 is more than the height of first fin 22, Although the height of the second main fin 21 is usually less than 2mm.
As described above, according to the first advancing angle α1With the second advancing angle α2Between relative angle, main fin 21 Height can be greater or lesser and the quantity of discontinuities that is formed by groove 22 can be more or less.
2 and Figure 13 referring to Fig.1, in the second embodiment of the method according to the present invention for manufacturing finned tube 2, in wing The outer surface of piece pipe 2 and inner surface have been respectively formed on multiple low fins.
In this case, according to the method for the present invention using include and the first work package 30 as described above and support The first similar work package 50 of component 40 and the machine 5 of support component 70 execute.The exterior section of pipe fitting 2 with aforementioned phase Same mode is machined.
Machine 5 further includes the second work package of the inner fins for being suitable for processing pipe fitting 2.Inner fins are by means of fin Machining tool 61 and obtain, the wherein profile of fin machining tool 61 and the profile obtained on the inner surface for staying in pipe fitting 2 is symmetrical. Tool 61 is inserted into pipe fitting and the pressure by being applied to by the first rotation tool 32 and the second rotation tool 31 on pipe fitting 2 Power and be " activated ", wherein pipe fitting 2 is resting on the smooth surface cylindrical guide 71 and 72 of support component 70.This leads to pipe The internal diameter of part 2 reduces, therefore pipe fitting 2 processes fin by in-house tool 61.
The cornerite of inner fins is with the cornerite of outside fin 21 on the contrary, to prevent external tool or in-house tool from blocking not It is dynamic.The density of the fin on advancing angle, height and the interior section of fin can be obtained in range known in the prior art.
In brief, described method is carried out using two contour machining tools by low-alloy steel or high alloy steel At pipe fitting outside (or outwardly and inwardly) cold forming.The configuration so that productivity is higher, to prevent in the con-trary case Frequent tool damage/breakage risk, and the complexity of used mechanical device is minimized.As the prior art In it is known, which is also applied for processing steel alloy, such as corronil, stainless steel, dual phase steel, titanium steel, this is for many It is crucial for alternative.
Based on foregoing description, have been observed that according to the present invention for manufacturing the method for finned tube, thus obtained fin Pipe and heat exchanger particularly indulge flow tube shell type heat exchanger, how to realize expected purpose and target.
Based on the description provided, other features, remodeling or improve be possible and for those skilled in the art and Speech is apparent.Therefore these features, remodeling and improvement should be considered as the part of the present invention.In practice, used Material, size and the shape different because of situation can according to demand with depending on the prior art.

Claims (10)

1. a kind of vertical flow tube shell type heat exchanger (1), the vertical flow tube shell type heat exchanger (1) includes accommodating shell (101), first-class Body flows while the longitudinal axis of the shell (101) can be arranged essentially parallel in the receiving shell (101), the receiving Shell (101) inside it in accommodate a branch of pipe fitting (2) and multiple lattice-shaped baffles (102), a branch of pipe fitting substantially that This is parallel and is parallel to the longitudinal axis of the shell (101), and the multiple lattice-shaped baffle extends substantially transversely to described The longitudinal axis of shell (101) is to support the pipe fitting (2), a branch of pipe fitting (2) to be suitable for making second fluid at it Middle flowing, which is characterized in that the pipe fitting (2) is provided with multiple low fins (21), institute at least part of its outer surface It states low fin (21) to be spirally set to the first advancing angle α on the outer surface of the pipe fitting (2), and the low fin (21) profile is interrupted by the spiral groove (22) with the second advancing angle β, wherein α ≠ β.
2. vertical flow tube shell type heat exchanger (1) according to claim 1, which is characterized in that the height H of the low fin (21) It≤2mm and is preferably ranges between 0.5mm and 1.5mm.
3. vertical flow tube shell type heat exchanger (1) according to claim 1, which is characterized in that the first advancing angle α<80 °, And preferably 15 °≤α≤60 °, more preferably 20 °≤α≤45 °.
4. vertical flow tube shell type heat exchanger (1) according to any one of the preceding claims, which is characterized in that before described first Into the relative angle between angle α and the second advancing angle β between 0 ° and 90 °, and be preferably ranges between 30 ° with 60 ° it Between.
5. vertical flow tube shell type heat exchanger (1) according to any one of the preceding claims, which is characterized in that in the pipe fitting (2) multiple low fins are provided on inner surface.
6. vertical flow tube shell type heat exchanger (1) according to any one of the preceding claims, which is characterized in that the pipe fitting (2) band finless parts (20) and smooth part (200) are alternately provided on.
7. method of the one kind for manufacturing finned tube (2), it includes work package (30,50) and at least one that the method, which uses, The machine (3,5) of support component (40,70) executes, and first work package (30,50) includes being sequentially arranged at same driving The first rotating fins machining tool (32) on axis (33) and the second rotating fins machining tool (31), first rotating fins Machining tool (32) is provided with the first advancing angle α1The first spiral shape working profile, second rotating fins process work Tool (31) is provided with the second advancing angle α2The second spiral shape working profile, wherein α2≠α1, described the method includes making Pipe (2) advances in the plane limited by the support component (40,70), by means of the first rotating fins machining tool (32) the first fin (22) is formed on the pipe (2), by means of the second rotating fins machining tool (31) in the pipe (2) the second fin (21) is formed on, the formation of second fin (21) follows closely after the formation of first fin (22), The height of first fin (22) is less than the height of second fin (21).
8. the method according to claim 7 for manufacturing finned tube (2), which is characterized in that the first advancing angle α1With The second advancing angle α2Between relative angle between 0 ° and 90 °, be preferably ranges between 30 ° and 60 °, and its Described in the first fin height h≤0.5mm, and height H≤2mm of second fin.
9. the finned tube (2) that one kind being used for heat exchanger (1,10,100), is particularly used for shell-and-tube heat exchanger (1), the fin Pipe (2) is obtained by method according to claim 7 or 8.
10. the finned tube (2) according to claim 9 for heat exchanger (1,10,100), which is characterized in that in the wing Multiple low fins (21) are provided at least part of the outer surface of piece pipe (2), the low fin (21) is with the first advancing angle α It is spirally set on the outer surface of the finned tube (2) and the profile of the low fin (21) is by having second to be threadingly advanced The spiral grooves (22) of angle beta are interrupted, wherein α ≠ β, and the first advancing angle α is preferably<80 °, and more preferably 15 °≤α ≤ 60 °, the relative angle between the first advancing angle α and the second advancing angle β is preferably ranges between 0 ° and 90 °, and And more preferably between 30 ° and 60 °, the height H of the low fin (21) preferably≤2mm, more preferably between 0.5mm To between 1.5mm.
CN201680074849.0A 2015-12-23 2016-11-25 Shell-and-tube heat exchanger, the finned tube for this heat exchanger and corresponding method Pending CN108431538A (en)

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ITUB2015A009298A ITUB20159298A1 (en) 2015-12-23 2015-12-23 Shell and tube heat exchanger and shell, finned tubes for this exchanger and relative production method.
IT102015000086994 2015-12-23
PCT/EP2016/078809 WO2017108330A1 (en) 2015-12-23 2016-11-25 Shell and tube heat exchanger, finned tubes for such heat exchanger and corresponding method

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ITUB20159298A1 (en) 2017-06-23
US20180372427A1 (en) 2018-12-27
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WO2017108330A1 (en) 2017-06-29
ES2944546T3 (en) 2023-06-22

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