CN102032827A - Process for processing heating jacket of heat exchange pipe - Google Patents
Process for processing heating jacket of heat exchange pipe Download PDFInfo
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- CN102032827A CN102032827A CN2010105662931A CN201010566293A CN102032827A CN 102032827 A CN102032827 A CN 102032827A CN 2010105662931 A CN2010105662931 A CN 2010105662931A CN 201010566293 A CN201010566293 A CN 201010566293A CN 102032827 A CN102032827 A CN 102032827A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a process for processing a heating jacket of a heat exchange pipe, which at least comprises the following steps: 1, obtaining an outer pipe and a heat exchange component; 2, enabling the temperature of the outer pipe higher than that of the heat exchange component so as to form a temperature difference between the outer pipe and the heat exchange component; 3, nesting the heat exchange component into the outer pipe; and 4, enabling the temperature of the outer pipe to be same as that of the heat exchange component so as to obtain a heat exchange pipe. In the invention, the heat exchange component is nested into the outer pipe through a temperature difference. Because the heat exchange pipe prepared by using the process in the invention is provided with the heat exchange component in the outer pipe, the heat exchange area of the heat exchange pipe is increased, the heat exchange efficiency of an indirect heat exchange area of the heat exchange pipe is improved, and the whole heat exchange efficiency of the heat exchange pipe is higher than that of an existing heat exchange pipe. The process in the invention is low in cost and easy to manufacture, suitable to be applied to the industries such as petroleum, chemical engineering, fertilizer, boiler, pharmacy, food, electricity, nuclear energy, environmental protection, heating and the like and used as the pipe for efficient heat exchangers or the heat exchange equipment.
Description
Technical field
The present invention relates to the metal tube processing technique field, relate in particular to a kind of processing technology that is used for the heat exchanger tube of heat transmission equipments such as heat exchanger.
Background technology
Press GB/T24590-2009 " high-performance heat exchanger heat exchanger tube " standard, the existing high-efficiency heat exchange tube for heat exchanger of China is divided into and is four major types, is respectively T type barrel, bellows, interior ripple male-pipe, interior barrel.The common ground of their maximums is: all be to go up at metal parent tube (straight collimator) by cold machining process to make the heat exchanger tube that processes.
As shown in Figure 1, T type barrel of the prior art forms intensive helical form T type groove 11 by cold working on the outer wall of metal parent tube 1.T type barrel can be divided into by version: the I type, and the pipe outer wall is T type conduit, inside pipe wall smooth surface; The II type, the pipe outer wall is T type conduit, and 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 by 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 by cold working.
As shown in Figure 4, of the prior art in barrel, form the heat exchanger tube of groove 11 by cold working at the inwall of metal parent tube 1.Interior barrel can be divided into by version: I type, axial notch; The II type, helical groove.
Above-mentioned four big class 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 " efficiently " heat exchanger tube.
Above-mentioned this four big class heat exchanger tube all passes through cold-formed as parent tube with the seamless metal straight collimator, its cold machining process mainly is the variation of the seamless metal straight collimator being done shape.Further, this four big class heat exchanger tube all is to carry out cold working on the inside and outside wall of seamless metal straight collimator, and the processing amplitude is limit by pipe thickness, therefore is 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 is subjected to great limitation at aspects such as specification, length;
2, because the cold working step is arranged, raw-material loss is bigger;
3, because cold working process complexity causes 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, this four big class heat exchanger tube has 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, this four big class heat exchanger tube all passes through cold working, has residual stress on the body, medium by 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 entered 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 heat exchanger tube of a kind of heat exchange efficiency and processing technology thereof always.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides the processing technology of the above-mentioned heat exchanger tube of production that a kind of technology is simple, the processing limitation is few.
For achieving the above object, the invention provides a kind of hot jacket processing technology of heat exchanger tube, comprise at least: step 1 obtains outer tube; Obtain heat exchanger components; Step 2 makes the temperature of described outer tube be higher than the temperature of described heat exchanger components, forms a temperature difference; Step 3, the described outer tube that will have a temperature difference with described heat exchanger components with described outer tube outside, described heat exchanger components is linked at interior state; Step 4 makes the temperature of described outer tube identical with the temperature of described heat exchanger components, obtains described heat exchanger tube.
Preferably, in the described step 2, the temperature by improving described outer tube also keeps the temperature-resistant of described heat exchanger components, forms the described temperature difference.
Preferably, in the described step 2,, form the described temperature difference by keeping the temperature-resistant of described outer tube and reducing the temperature of described heat exchanger components.
Preferably, in the described step 2,, form the described temperature difference by temperature that improves described outer tube and the temperature that reduces described heat exchanger components.
Preferably, the inside of described outer tube is medium channel; Described heat exchanger components with described medium channel be divided into the direct heat transfer district of described outer tube heat exchange and with the indirect heat exchange district of described heat exchanger components heat exchange; Be positioned at the heat transferring medium exchange heat energy of the heat transferring medium in described indirect heat exchange district by described heat exchanger components and described direct heat transfer district.
Preferably, described outer tube and/or described heat exchanger components are the metal welded tube.
Preferably, in the described step 1, described heat exchanger components is interior pipe.
Preferably, the cross section of described interior pipe is a polygon.Further, described be deformed into described in pipe obtain through press process, or obtain by welding.
Preferably, described interior pipe is connected to form by a plurality of curved surfaces.Further, described a plurality of curved surfaces is the continuous cold rolling machined surface that described interior pipe obtains through press process.
Preferably, described outer tube and described in pipe be the metal welded tube and when the state of coaxial inside and outside fit, the longitudinal seam of described outer tube shifts to install in a circumferential direction with the longitudinal seam of described interior pipe.
Preferably, inner surface, the outer surface of described interior pipe are smooth surface.
Preferably, the linearly or helical form of described interior pipe.
Preferably, described interior pipe is multilayer pipe.
Preferably, the tube wall of described interior pipe is provided with at least one through hole.These through holes can be O shape hole or star-shaped aperture or polygonal hole or other irregularly-shaped holes.
Preferably, described heat exchanger components also comprises the joint portion that fits tightly with described outer tube.
Preferably, described joint portion has the corner of circular arc.
Preferably, in the described step 3, the described joint portion on the described heat exchanger components and the inwall of described outer tube fit tightly.
Processing technology of the present invention is compared with heat exchange tube machining technique in the prior art, owing to do not have a large amount of cold working operations, thereby reduced the production cost of heat exchanger tube significantly, improved manufacturing efficient, have stable crudy.Owing to there is not cold working, the inwall of heat exchanger tube does not have residual stress, and its anti-fouling tendency, corrosion resistance are better.
From the tubulation apparatus cost relatively, must have special machined, cold working equipment of existing heat exchanger tube production.And processing technology of the present invention only need be done simple transformations such as mould on existing tubulation apparatus, just can produce the interior pipe that heat exchanger tube of the present invention adopts.Therefore, processing technology of the present invention 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.
The heat exchanger tube that processing technology of the present invention obtains owing to be provided with heat exchanger components in outer tube, is compared with the heat exchanger tube of equivalent diameter in the prior art, and heat exchange area has increased several times.
Further, above-mentioned heat exchanger components also is divided into the medium channel in the outer tube near the direct heat transfer district of outer tube wall and the indirect heat exchange district of close outer tube hub.Heat exchanger tube of the present invention is in heat exchanging process, when heat transferring medium passes through in medium channel, near the heat transferring medium in the direct heat transfer district of outer tube wall by outer tube wall directly with outer tube another medium heat exchange outward, heat exchange efficiency and prior art that should the zone in the medium channel be basic identical.The present invention is owing to be provided with heat exchanger components in outer tube, can also form heat exchange by the heat transferring medium in heat exchanger components and the direct heat transfer district near the heat transferring medium in the indirect heat exchange district of outer tube hub, again by this another medium heat exchange that this portion of energy and outer tube is outer of the heat transferring medium in the direct heat transfer district, so improved greatly in the medium channel should the zone heat exchange efficiency.
The heat exchanger tube that processing technology therefore of the present invention obtains 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 present invention 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 present invention has reduced the manufacturing cost of heat exchanger tube significantly.
And, the heat exchanger tube that processing technology of the present invention obtains is owing to have smooth outer surface, when making heat exchange equipment, and the good sealing effect of heat exchanger tube and section of jurisdiction, be more suitable for the manufacturing technology of existing heat exchange equipment, be much higher than existing four big class heat exchanger tubes in its projected life and service life.
The heat exchanger tube that processing technology of the present invention obtains, 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.
Description of drawings
Fig. 1 is the structural representation of a kind of T type barrel 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 schematic diagram of embodiments of the invention 1;
Fig. 6 is the side-looking structural representation of the interior pipe in the embodiments of the invention 2;
Fig. 7 is the cross-sectional structure schematic diagram of embodiments of the invention 3;
Fig. 8 is the side-looking structural representation of the interior pipe in embodiment illustrated in fig. 7;
Fig. 9 A is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 B is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 C is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 D is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 E is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 F is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 G is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 H is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 I is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 G is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Fig. 9 K is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment that obtains of the present invention;
Figure 10 A is the cross-sectional structure schematic diagram of embodiments of the invention 4;
Figure 10 B is the cross-sectional structure schematic diagram of other embodiment of the heat exchanger tube that obtains of the present invention
Figure 11 is the compacting flow sheet equipment schematic diagram of interior pipe in the hot jacket processing technology of the present invention.
The specific embodiment
Be described further below with reference to the technique effect of accompanying drawing, to understand purpose of the present invention, feature and effect fully design of the present invention, concrete structure and generation.
Embodiment 1:
The heat exchanger tube that technology of the present invention obtains is one to have the metal tube of certain-length, mainly comprises the outer tube 1 of metal and is arranged on the interior pipe 2 of outer tube 1 inside, and both closely cooperate, and fixedly install together.
As shown in Figure 5, in the present embodiment, outer tube 1 is a metal welded tube, as 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.The inside and outside surface of outer tube 1 is smooth surface.
The inside of outer tube 1 forms the medium channel of heat transferring medium circulation, pipe 2 in also being provided with.Interior 2 heat exchanger components that are used as in the outer tube 1 of managing are with the heat exchanger tube of outer tube 1 common formation technology acquisition of the present invention.In the present embodiment, interior pipe 2 also is a metal welded tube, and outer surface is linearly.
Particularly, the interior pipe 2 in the present embodiment is to be adopted between continuous 21,4 curved surfaces 21 of 4 curved surfaces that press process technology forms by corner 22 connections of 4 circular arcs by the metal welded tube of a circle, and each curved surfaces is a cold rolling machined surface.
The heat exchange area of above-mentioned heat exchanger tube has increased about 5 times than the heat exchanger tube of equivalent diameter in the prior art.
The corner 22 of circular arc will have certain radian, and according to the difference of outer tube 1 diameter, preferably adopting knuckle radius is the 2-10 millimeter.Guaranteed that so promptly inner and outer pipe has enough fit contacts area, guaranteed the friction tight firm and integraty of inner and outer pipe again; Also avoided because the existence of sharp comer adds the inwall that scratches outer tube 1 man-hour at hot jacket.
Further, outer tube 1 and interior pipe 2 are when the state of coaxial setting and inside and outside fit, and the longitudinal seam on longitudinal seam on the outer tube 1 and the interior pipe 2 shifts to install (not shown among Fig. 5) in a circumferential direction.
Preferably, the angle of dislocation is 90 °.Certainly, in other embodiments, also can select for example 30 °, 60 °, 150 °, 180 ° equal angles.
The heat transferring medium in the direct heat transfer district 31 and the direct heat-shift of tube wall of outer tube 1, its heat exchange is more abundant, and therefore the heat exchange efficiency and the prior art in four direct heat transfer districts 31 are basic identical.
But above-mentioned heat exchanger tube of the present invention has also formed an indirect heat exchange district 32 owing to be provided with heat exchanger components in outer tube 1.Heat transferring mediums in the indirect heat exchange district 32 do not have directly with the tube wall of outer tube 1 and contact, but with four curved surfaces 21 heat-shifts as the interior pipe 2 of heat exchanger components.
The heat of the heat transferring medium in the indirect heat exchange district 32 exchanges on the heat transferring medium in four direct heat transfer districts 31 that are arranged in the outside by four curved surfaces 21, exchanges on another medium outside the outer tube 1 again.Like this, the present invention is by means of heat exchanger components, makes to be positioned at outer tube 1 center, also to participate in fully in the heat transfer process with heat transferring medium that outer tube 1 does not have the indirect heat exchange district 32 that directly contacts, improved the heat exchange efficiency of heat exchanger tube widely.
As the interior pipe 2 in the present embodiment, the beneficial effect of concaved circular cambered surface is in adopting, and not only can improve the heat exchange area of heat exchanger tube significantly, has improved the heat exchange efficiency of heat exchanger tube; Can also strengthen the flow and the flow velocity of heat transferring medium in the indirect heat exchange district 32, also improve the heat exchange efficiency of heat exchanger tube.Further, also improve the stress of heat exchanger tube under the heat transferring medium effect, strengthened the rigidity of interior pipe 2.
In corner 22 places of pipe on 2 form the joint portion, fit tightly with the inwall of outer tube 1, form the relation that fixedly installs.In theory, the gap that requires to fit tightly is zero.Certainly, in the practical operation, can set the actual detection data.
The heat exchanger tube that technology of the present invention obtains is not also owing to have cold working behind the hot jacket, so internal structure stress eliminates substantially, and anti-fouling tendency, corrosion resistance are better.
The present invention also has simple in structure, and cost is low, makes more beneficial effect such as facility.
Heat exchanger tube of the prior art has particular external surface shape (such as spiral, T groove, ripple) mostly, and when making heat exchange equipment, being connected of heat exchanger tube of the prior art and tube sheet must the increase linkage section; The gap is bigger between heat exchanger tube and the deflection plate, and stationarity is poor.And the heat exchanger tube that technology of the present invention obtains has smooth outer surface, is more suitable for the manufacturing technology of traditional heat exchangers, is much higher than existing four big class heat exchanger tubes in its projected life and service life.
Consider the needs in the technology of follow-up making heat exchange equipment, with the condition of tube sheet welding under, the outer tube 1 of the heat exchanger tube that technology of the present invention obtains can be at 0.5-3mm than interior pipe 2 extension elongations, and heat exchanger tube and tube sheet combine together or guarantee enough leg size height when guaranteeing welding.With tube sheet be under the condition of expand tube, outer tube 1 of the present invention can be controlled at about 40mm than interior pipe 2 extension elongations, is beneficial to the reliability of expand tube operation.
According to client's needs, the entire length of the heat exchanger tube that technology of the present invention obtains can be chosen between tens of rice at 0 meter.Certainly, if the reasonable disposition heat-treatment furnace, the entire length of the heat exchanger tube that technology of the present invention obtains can also be in random length, and is not subject to the specification of cold working equipment.
In other embodiments, also only one of outer tube or interior pipe adopt welded tube, and another adopts seamless metal straight collimator or other common metal pipes.
Embodiment 2:
As shown in Figure 6, the heat exchanger tube of present embodiment and the structure of the foregoing description are basic identical, all comprise the interior pipe 2 of an outer tube 1, as heat exchanger components, and institute's difference is that the outer surface of interior pipe 2 is shape in the shape of a spiral.
In other embodiments, offer T type groove, thread groove etc., can realize essentially identical technique effect at the outer surface of interior pipe 2.
Embodiment 3:
The structure of present embodiment and embodiment 1 is basic identical, comprises outer tube 1, interior pipe 2, and institute's difference is that the shape of cross section of interior pipe 2 is a triangle, has formed three direct heat transfer districts 31 and an indirect heat exchange district 32 in outer tube 1.
In addition, also be provided with at least one through hole 23 on the tube wall of interior pipe 2.These through holes 23 can be O shape hole or star-shaped aperture or polygonal hole or other irregularly-shaped holes.
Preferably, referring to Fig. 7, Figure 8 shows that in the present embodiment in the side-looking structure of pipe 2, a plurality of through holes 23 be distributed in array on the tube wall of pipe 2.
In other embodiments, the cross section of interior pipe 2 can have various ways.The outer tube 1 shown in Fig. 9 A, Fig. 9 B, Fig. 9 C, Fig. 9 D, Fig. 9 E, Fig. 9 F, Fig. 9 G, Fig. 9 H, Fig. 9 I, Fig. 9 G, Fig. 9 K and the various versions of interior pipe 2 are the embodiment of the heat exchanger tube of technology acquisition of the present invention.
In the above-mentioned various embodiment, can adopt the interior pipe 2 of smooth surface or, can realize essentially identical technique effect with the interior pipe 2 of a plurality of through holes.
Embodiment 4:
The structure of present embodiment and embodiment 1 is basic identical, comprises outer tube 1, interior pipe 2, and institute's difference is that referring to Figure 10 A, interior pipe 2 is the pair of lamina pipe, comprises skin 21, internal layer 24.
A kind of heat transferring medium that can only circulate in the heat exchanger tube of the present invention, with other outer Medium Exchange heats of heat exchanger tube.
Because interior pipe is bimetallic tube, the two kinds of heat transferring mediums that also can circulate in the heat exchanger tube of the present invention, i.e. circulation medium one in the internal layer 24 of interior pipe, circulation medium two between the internal layer 24 of interior pipe and outer tube 1, other media circulate outside outer tube 1.In the heat transmission equipment of more complicated, sometimes need on the medium of exchange heat to two kind of the different temperatures of a kind of medium (medium one of for example above-mentioned circulation in the internal layer 24 of interior pipe 2) (medium two of circulation and other media that outside outer tube 1, circulate between for example above-mentioned internal layer 24 at interior pipe 2 and the outer tube 1), the structural design of present embodiment just can solve the problems of the technologies described above, and has beneficial effects such as simple in structure.
When heat exchanger tube of the present invention is multilayer pipe when interior pipe 2, interior pipe 2 can also be other shapes, shown in Figure 10 B, or in the interior pipe 2 shown in Fig. 9 A, Fig. 9 B, Fig. 9 C, Fig. 9 D, Fig. 9 E, Fig. 9 F, Fig. 9 G, Fig. 9 H, Fig. 9 I, Fig. 9 G, Fig. 9 K, increase one deck internal layer, or the like.
Certainly, in other embodiment, interior pipe 2 also can be three layers, or more multi-layered.
Embodiment 5:
The hot jacket processing technology of heat exchanger tube of the present invention mainly is to obtain earlier outer tube, heat exchanger components respectively, forms the temperature difference then and do hot jacket processing, the final heat exchanger tube that obtains between outer tube, heat exchanger components.
Particularly, processing technology of the present invention in one embodiment, step 1 at first obtains outer tube and as the interior pipe 2 of heat exchanger components.Outer tube is selected all smooth welded tube in an inside and outside surface for use.
In the present embodiment, interior pipe 2 is connected to form by four curved surfaces.In conjunction with shown in Figure 11, (among Figure 11 between top roll 411 and the lower roll 421 is the straight collimator of a cross section for circle to interior pipe 2, manages 2 raw material in promptly making, and may there be linear loss in accompanying drawing 11 by the acquisition of press process technology by a circle light pipe, lines are rough, should be smooth circles).
Press device mainly comprises a series of support 401,402,403,404, be respectively arranged with top roll 411,412,413,414 and lower roll 421,422,423,424 on each support, also be respectively arranged with a series of left roller, right roller (not shown) in the both sides of interior pipe 2.By progressively distortion of four sides extruding, need to obtain the interior pipe 2 of profile.
Press in the process that arcs are shaped the corner of four circular arcs that also must leave between four curved surfaces, the joint portion that the corner of circular arc fits tightly as interior pipe 2 and outer tube at interior pipe 2.Corner will have enough suitable size, for example is 2-10mm.Four corners are set make inner and outer pipe that enough fit contacts area be arranged, both are a tight fit in together securely; Also avoided existence, when hot jacket, scratched the possibility of outer tube wall owing to sharp comer.
Outer tube is the suitable temperature of GPRS control when heating, and in general: carbon steel outer tube hot jacket heating and temperature control is about the AC1 line; Austenitic stainless steel, austenite-ferrite dual phase steel heating-up temperature can reach about the AC3 line; Can behind fit, do bright annealing or solution treatment to austenite simultaneously in stainless steel or other nonferrous metal tube.
Step 3, the outer tube that will have a temperature difference with interior pipe with outer tube outside, interior pipe is linked at interior state.Joint portion on the interior pipe (corner) fits tightly with the inwall of outer tube.Preferably, contact-making surface fit gap is zero.
Step 4 makes the temperature of outer tube identical with the temperature of interior pipe at last, preferably all returns to normal temperature, obtains heat exchanger tube as shown in Figure 5.
In other embodiments, can also make two ends end face and its axis normal of heat exchanger tube, and remove the otch burr by a spot of cold working.
In other embodiments, also can be by keeping the temperature of pipe in the temperature-resistant of outer tube and the reduction, to form the above-mentioned temperature difference.Perhaps, by temperature that improves outer tube and the temperature that reduces interior pipe, form the above-mentioned temperature difference.
The variation of form of tubes in the heat exchanger tube only need be done an adjustment to a series of pressure rollers of process equipment and can satisfy, and this is a prior art, and this paper repeats no more.For interior pipe is the embodiment of multilayer pipe, can implement equally as long as multilayer pipe is considered as an interior pipe.Therefore above-mentioned processing method of the present invention can be used for processing the heat exchanger tube among the arbitrary embodiment of the present invention, all has identical beneficial effect.
In sum, described in this specification is several preferred embodiment of the present invention, and above embodiment is only unrestricted in order to technical scheme of the present invention to be described.All technical staff in the art all should be within claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (19)
1. the hot jacket processing technology of a heat exchanger tube is characterized in that: may further comprise the steps at least:
Step 1 obtains outer tube; Obtain heat exchanger components;
Step 2 makes the temperature of described outer tube be higher than the temperature of described heat exchanger components, forms a temperature difference;
Step 3, the described outer tube that will have a temperature difference with described heat exchanger components with described outer tube outside, described heat exchanger components is linked at interior state;
Step 4 makes the temperature of described outer tube identical with the temperature of described heat exchanger components, obtains described heat exchanger tube.
2. processing technology as claimed in claim 1 is characterized in that: in the described step 2, the temperature by improving described outer tube also keeps the temperature-resistant of described heat exchanger components, forms the described temperature difference.
3. processing technology as claimed in claim 1 is characterized in that: in the described step 2, by keeping the temperature-resistant of described outer tube and reducing the temperature of described heat exchanger components, form the described temperature difference.
4. processing technology as claimed in claim 1 is characterized in that: in the described step 2, by temperature that improves described outer tube and the temperature that reduces described heat exchanger components, form the described temperature difference.
5. as the arbitrary described processing technology of claim 1 to 4, it is characterized in that: the inside of described outer tube is medium channel; Described heat exchanger components with described medium channel be divided into the direct heat transfer district of described outer tube heat exchange and with the indirect heat exchange district of described heat exchanger components heat exchange; Be positioned at the heat transferring medium exchange heat energy of the heat transferring medium in described indirect heat exchange district by described heat exchanger components and described direct heat transfer district.
6. heat exchanger tube as claimed in claim 1 is characterized in that: described outer tube and/or described heat exchanger components are the metal welded tube.
7. processing technology as claimed in claim 1 is characterized in that: in the described step 1, described heat exchanger components is interior pipe.
8. processing technology as claimed in claim 7 is characterized in that: the cross section of pipe is a polygon in described.
9. processing technology as claimed in claim 8 is characterized in that: described be deformed into described in pipe obtain through press process, or obtain by welding.
10. processing technology as claimed in claim 7 is characterized in that: pipe is connected to form by a plurality of curved surfaces in described.
11. processing technology as claimed in claim 10 is characterized in that: described a plurality of curved surfaces are the continuous cold rolling machined surface that described interior pipe obtains through press process.
12. as the arbitrary described heat exchanger tube of claim 7 to 11, it is characterized in that: described outer tube and described interior pipe are the metal welded tube and when the state of coaxial inside and outside fit, the longitudinal seam of the longitudinal seam of described outer tube and described interior pipe shifts to install in a circumferential direction.
13. as the arbitrary described heat exchanger tube of claim 7 to 11, it is characterized in that: inner surface, the outer surface of pipe are smooth surface in described.
14., it is characterized in that: the linearly or helical form of pipe in described as the arbitrary described heat exchanger tube of claim 7 to 11.
15. as the arbitrary described heat exchanger tube of claim 7 to 11, it is characterized in that: pipe is multilayer pipe in described.
16. as the arbitrary described heat exchanger tube of claim 7 to 11, it is characterized in that: the tube wall of pipe is provided with at least one through hole in described.
17. processing technology as claimed in claim 1 is characterized in that: described heat exchanger components also comprises the joint portion that fits tightly with described outer tube.
18. processing technology as claimed in claim 17 is characterized in that: described joint portion has the corner of circular arc.
19. processing technology as claimed in claim 17 is characterized in that: in the described step 3, the described joint portion on the described heat exchanger components and the inwall of described outer tube fit tightly.
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| CN2010105662931A CN102032827A (en) | 2010-11-30 | 2010-11-30 | Process for processing heating jacket of heat exchange pipe |
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| CN2010105662931A CN102032827A (en) | 2010-11-30 | 2010-11-30 | Process for processing heating jacket of heat exchange pipe |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213441A (en) * | 2011-05-31 | 2011-10-12 | 杭州美宝炉窑工程有限公司 | Jet-flow air pre-heater with heat exchange tubes having same inlet and outlet temperature difference |
| CN103644686A (en) * | 2013-12-24 | 2014-03-19 | 上海环球制冷设备有限公司 | Efficient tube-fin-type condenser device and using method thereof |
| CN103697740A (en) * | 2013-12-18 | 2014-04-02 | 杭州汉惠通用设备有限公司 | Inner petal-shaped irregular-shaped heat exchange tube |
| CN107062707A (en) * | 2016-10-20 | 2017-08-18 | 合肥华凌股份有限公司 | Evaporator and refrigeration plant |
| CN107270744A (en) * | 2017-05-24 | 2017-10-20 | 浙江建春换热器有限公司 | Efficient coaxial sleeve heat exchanger |
| CN108050868A (en) * | 2017-12-08 | 2018-05-18 | 青岛开拓隆海制冷配件有限公司 | Air source heat pump low temperature water system heat exchanger thermoexcell and its manufacturing method |
| CN108332583A (en) * | 2018-02-11 | 2018-07-27 | 佛山科学技术学院 | A kind of axial notch heat exchanger tube double pipe heat exchanger |
| WO2021047463A1 (en) * | 2019-09-12 | 2021-03-18 | 青岛海尔电冰箱有限公司 | Evaporator assembly for ice-making apparatus |
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| CN102213441A (en) * | 2011-05-31 | 2011-10-12 | 杭州美宝炉窑工程有限公司 | Jet-flow air pre-heater with heat exchange tubes having same inlet and outlet temperature difference |
| CN103697740A (en) * | 2013-12-18 | 2014-04-02 | 杭州汉惠通用设备有限公司 | Inner petal-shaped irregular-shaped heat exchange tube |
| CN103644686A (en) * | 2013-12-24 | 2014-03-19 | 上海环球制冷设备有限公司 | Efficient tube-fin-type condenser device and using method thereof |
| CN107062707A (en) * | 2016-10-20 | 2017-08-18 | 合肥华凌股份有限公司 | Evaporator and refrigeration plant |
| CN107270744A (en) * | 2017-05-24 | 2017-10-20 | 浙江建春换热器有限公司 | Efficient coaxial sleeve heat exchanger |
| CN108050868A (en) * | 2017-12-08 | 2018-05-18 | 青岛开拓隆海制冷配件有限公司 | Air source heat pump low temperature water system heat exchanger thermoexcell and its manufacturing method |
| CN108050868B (en) * | 2017-12-08 | 2019-08-16 | 青岛开拓隆海制冷配件有限公司 | Air source heat pump low temperature water system heat exchanger thermoexcell and its manufacturing method |
| CN108332583A (en) * | 2018-02-11 | 2018-07-27 | 佛山科学技术学院 | A kind of axial notch heat exchanger tube double pipe heat exchanger |
| WO2021047463A1 (en) * | 2019-09-12 | 2021-03-18 | 青岛海尔电冰箱有限公司 | Evaporator assembly for ice-making apparatus |
| CN114364935A (en) * | 2019-09-12 | 2022-04-15 | 青岛海尔电冰箱有限公司 | Evaporator assembly for ice making apparatus |
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Application publication date: 20110427 |