CN201876174U - Heat exchange tube with double layers of inner tubes - Google Patents
Heat exchange tube with double layers of inner tubes Download PDFInfo
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- CN201876174U CN201876174U CN 201020633866 CN201020633866U CN201876174U CN 201876174 U CN201876174 U CN 201876174U CN 201020633866 CN201020633866 CN 201020633866 CN 201020633866 U CN201020633866 U CN 201020633866U CN 201876174 U CN201876174 U CN 201876174U
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- tube
- heat exchange
- bilayer
- heat exchanger
- heat
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Abstract
The utility model discloses a heat exchange tube with double layers of inner tubes, which at least comprises an outer tube. The interior of the outer tube is provided with a medium channel, and the double layers of inner tubes used as heat exchange components are arranged in the medium channel. The double layers of inner tubes comprise an outer layer and at least one inner layer and divide the medium channel into a first medium heat exchange area in the inner layer and a second medium heat exchange area arranged between the inner layer and the outer tube. Two heat exchange media can flow in the heat exchange tube with the double layers of inner tubes, and the heat exchange tube has the beneficial effects of multiple heat exchange forms, simple structure and low cost, is convenient to manufacture and is suitable for pipes used as effective heat exchangers or heat exchange equipment in such industries as petroleum, chemical industries, chemical fertilizers, boilers, pharmacy, food, electric power, nuclear power, 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 heat exchange tube in heat transmission equipment such as heat exchanger double-deck that is used for.
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.
Above-mentioned four big class heat exchanger tubes can only be done man-to-man medium heat exchange because structural limitations, specifically, a kind of medium that can only in heat exchanger tube, circulate, the heat exchanger tube another kind of medium that circulates outward, carry out a pair of with heat exchange, the heat exchange form is single.
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 the various informative heat exchanger tube of a kind of heat exchange always.
The utility model content
Because the above-mentioned defective of prior art, technical problem to be solved in the utility model provides the various informative double-deck interior heat exchange tube of a kind of heat exchange.
For achieving the above object, the utility model provides heat exchange tube in a kind of bilayer, comprises outer tube at least, and the inside of described outer tube is medium channel; Double-deck interior pipe as heat exchanger components is set in the described medium channel, and pipe comprises outer and at least one internal layer in the described bilayer; Pipe is divided into the first medium heat transfer zone in the described internal layer and the second medium heat transfer zone between described internal layer and the described outer tube with described medium channel in the described bilayer.
Preferably, described skin 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 a pipe obtains through press process.
Preferably, described outer field cross section is a polygon.
Preferably, described internal layer is a metal circular tube.
Preferably, pipe is the metal welded tube in described outer tube and/or the described bilayer.
Preferably, pipe is the metal welded tube and when the state of coaxial inside and outside fit, the longitudinal seam of described outer tube and described outer field longitudinal seam shift to install in a circumferential direction in described outer tube and the described bilayer.
Preferably, described outer field inner surface, outer surface are smooth surface.
Preferably, pipe is linearly in the described bilayer.
Preferably, also comprise the joint portion that fits tightly with described outer tube on the described skin.
Heat exchange tube in the bilayer of the present utility model since in outer tube, be provided with double-deck in pipe as heat exchanger components, compare with the heat exchanger tube of equivalent diameter in the prior art, heat exchange area has increased several times.
The two kinds of heat transferring mediums that can circulate in the heat exchange tube in the bilayer of the present utility model, i.e. circulation medium one in the internal layer of interior pipe, circulation medium two between the internal layer of interior pipe and outer tube is at logical other media of outer tube outflow.In the heat transmission equipment of more complicated, sometimes need on the medium (for example above-mentioned) with exchange heat to two kind of the different temperatures of a kind of medium (for example above-mentioned medium that in the internal layer of interior pipe, circulates) at the medium two that circulates between internal layer and the outer tube with at other logical media of outer tube outflow, the structural design of present embodiment just can solve the problems of the technologies described above, and it is various informative to have a heat exchange, the beneficial effect that waits simple in structure.
Heat exchange tube is roughly the several times of existing heat exchanger tube in the bilayer of the present utility model 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.
And, heat exchange tube has smooth outer surface owing to outer tube in the bilayer of the present utility model, 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.
Heat exchange tube in the bilayer of the present 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.
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 embodiment 1 of the present utility model;
Fig. 6 is the side-looking structural representation of the interior pipe among the embodiment 2 of the present utility model;
Fig. 7 is the cross-sectional structure schematic diagram of embodiment 3 of the present utility model;
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 of the present utility model;
Fig. 9 B is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 C is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 D is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 E is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 F is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 G is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 H is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 I is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 G is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Fig. 9 K is the cross-sectional structure schematic diagram of heat exchanger tube one embodiment of the present utility model;
Figure 10 A is the cross-sectional structure schematic diagram of the embodiment 4 of double-deck heat exchanger tube of the present utility model;
Figure 10 B is the cross-sectional structure schematic diagram of an embodiment of double-deck heat exchanger tube of the present utility model.
The specific embodiment
Be described further below with reference to the technique effect of accompanying drawing, to understand the purpose of this utility model, feature and effect fully design of the present utility model, concrete structure and generation.
Embodiment 1:
Heat exchanger tube of the present utility model 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 pipe 2 is as the heat exchanger components in the outer tube 1, with outer tube 1 common formation heat exchanger tube of the present utility model.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 utility model 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 utility model 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.
Heat exchanger tube of the present utility model is not also owing to have cold working substantially, so internal structure stress eliminates substantially, and anti-fouling tendency, corrosion resistance are better.
The utility model 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 heat exchanger tube of the present utility model 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 heat exchanger tube of the present utility model 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 utility model 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 heat exchanger tube of the present utility model can be chosen between tens of rice at 0 meter.Certainly, if the reasonable disposition heat-treatment furnace, the entire length of heat exchanger tube of the present utility model can also be in random length, and is not subject to the specification of cold working equipment.
If adopt online tube-making process, the limitation of heat exchanger tube of the present utility model aspect length is very little, as long as attached with the cutting work step, substantially can be fully realizes its length requirement according to client's demand.
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.
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 utility model 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 utility model 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.
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 heat exchanger tube of the present utility model.
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 in a plurality of 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 utility model, 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 utility model, 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 utility model 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.
Heat exchange tube in the bilayer of the present utility model is not owing to there is a large amount of cold working operations, thus reduced significantly double-deck in the production cost of heat exchange tube, improved manufacturing efficient, have stable crudy.Owing to there is not cold working, double-deck in the inwall of heat exchange tube do not have residual stress, 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 heat exchange tube only need be done simple transformations such as mould in the bilayer of the present utility model on existing tubulation apparatus, just can produce the interior pipe that heat exchange tube is adopted in the bilayer of the present utility model.Therefore, heat exchange tube has reduced the investment in factory building and place in the bilayer of the present utility model, 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.
In sum, described in this specification is several preferred embodiment of the present utility model, and above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.All technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within claim protection domain of the present utility model.
Claims (10)
1. the interior heat exchange tube of bilayer comprises outer tube at least, and the inside of described outer tube is medium channel; It is characterized in that: the double-deck interior pipe as heat exchanger components is set in the described medium channel, and pipe comprises outer and at least one internal layer in the described bilayer; Pipe is divided into the first medium heat transfer zone in the described internal layer and the second medium heat transfer zone between described internal layer and the described outer tube with described medium channel in the described bilayer.
2. heat exchange tube in the bilayer as claimed in claim 1, it is characterized in that: described skin is connected to form by a plurality of curved surfaces.
3. heat exchange tube in the bilayer as claimed in claim 2 is characterized in that: described a plurality of curved surfaces are the continuous cold rolling machined surface that a pipe obtains through press process.
4. heat exchange tube in the bilayer as claimed in claim 1, it is characterized in that: described outer field cross section is a polygon.
5. heat exchange tube in the bilayer as claimed in claim 1, it is characterized in that: described internal layer is a metal circular tube.
6. heat exchange tube in the bilayer as claimed in claim 1 is characterized in that: pipe is the metal welded tube in described outer tube and/or the described bilayer.
7. heat exchange tube in the bilayer as claimed in claim 1, it is characterized in that: the interior pipe of described outer tube and described bilayer is the metal welded tube and when the state of coaxial inside and outside fit, the longitudinal seam of described outer tube and described outer field longitudinal seam shift to install in a circumferential direction.
8. heat exchange tube in the bilayer as claimed in claim 1, it is characterized in that: described outer field inner surface, outer surface are smooth surface.
9. heat exchange tube in the bilayer as claimed in claim 1 is characterized in that: pipe is linearly in the described bilayer.
10. heat exchange tube in the bilayer as claimed in claim 1 is characterized in that: also comprise the joint portion that fits tightly with described outer tube on the described skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020633866 CN201876174U (en) | 2010-11-30 | 2010-11-30 | Heat exchange tube with double layers of inner tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020633866 CN201876174U (en) | 2010-11-30 | 2010-11-30 | Heat exchange tube with double layers of inner tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876174U true CN201876174U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020633866 Expired - Fee Related CN201876174U (en) | 2010-11-30 | 2010-11-30 | Heat exchange tube with double layers of inner tubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201876174U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369272A (en) * | 2016-08-26 | 2017-02-01 | 江苏中圣压力容器装备制造有限公司 | Efficient heat exchange tube for LNG vaporizer and open rack vaporizer |
-
2010
- 2010-11-30 CN CN 201020633866 patent/CN201876174U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369272A (en) * | 2016-08-26 | 2017-02-01 | 江苏中圣压力容器装备制造有限公司 | Efficient heat exchange tube for LNG vaporizer and open rack vaporizer |
| CN106369272B (en) * | 2016-08-26 | 2018-12-28 | 江苏中圣压力容器装备制造有限公司 | Liquefied natural gas (LNG) gasifier efficient heat-exchanging pipe and open-frame type gasifier |
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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: 20120706 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201611 SONGJIANG, SHANGHAI TO: 317016 TAIZHOU, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120706 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 No. 69 Che Jing Road, Songjiang District, Shanghai Patentee before: Shanghai Kemi Steel Tube Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20131130 |