CN104646454A - Precise reshaping method for spiral tube type heat exchange assembly outer cylinder - Google Patents
Precise reshaping method for spiral tube type heat exchange assembly outer cylinder Download PDFInfo
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- CN104646454A CN104646454A CN201510056488.4A CN201510056488A CN104646454A CN 104646454 A CN104646454 A CN 104646454A CN 201510056488 A CN201510056488 A CN 201510056488A CN 104646454 A CN104646454 A CN 104646454A
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- urceolus
- exchanging component
- tube type
- accurate
- heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
Abstract
The invention discloses a precise reshaping method for a spiral tube type heat exchange assembly outer cylinder. The method comprises the main process flows of machining by a precise reshaping tooling device, shaping a heat exchange assembly outer cylinder, putting a leather bag inside the outer cylinder, putting the heat exchange assembly outer cylinder and the leather bag into the precise reshaping tooling device together, sealing the two ends of the tooling device, pressurizing the leather bag so as to enable the wall of the heat exchange assembly outer cylinder to fully yield, maintaining for a certain period of time, then, carrying out pressure relief, opening the two ends of the precise reshaping tooling device, taking out the heat exchange assembly outer cylinder and the leather bag, and taking the leather bag out of the outer cylinder, thereby completing a precise reshaping process for the heat exchange assembly outer cylinder. According to the reshaping method disclosed by the invention, the problem that precise reshaping cannot be realized due to the fact that the heat exchange assembly outer cylinder is large in size, small in thickness and long in length can be thoroughly resolved, and then, the inside diameter and straightness of the heat exchange assembly outer cylinder can meet high-precision requirements of design, so that the uniformity of heat exchange of tube bundles of all layers of a heat exchange assembly is ensured.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of method for the accurate integer of helix tube type heat-exchanging component urceolus.
Background technology
For the heat-exchanging component of helix tube type, the urceolus of heat-exchanging component, the annular gap between central tube and spiral heat exchange tube bundle constitute the runner of shell fluid medium.Due to the urceolus of heat-exchanging component, only play the effect organizing runner, consider from cost-saving angle, can thin cylinder be adopted.For spiral heat-exchanging component, the overall length of every root helix tube is generally very long, the temperature that result in heat-exchanging tube bundle outlet medium is all very sensitive to the interlamellar spacing of helical bundle, in order to ensure the wall temperature that various heat exchange is restrained and outlet medium temperature consistent, propose very high requirement with regard to the screw diameter of heat exchanging tube bank and the internal diameter of central tube and the internal diameter of urceolus.For the heat-exchanging component of 200,000 multikilowatt HTGR Demonstration Station (HTR-PM) steam generators, require that the screw diameter of different layers heat-exchanging tube bundle and the cylindricity of the external diameter of central tube and the internal diameter of urceolus are no more than 0.5, the linearity of axis can not more than 0.5.Simultaneously in order to reduce the cost that heat-exchanging component manufactures, the wall thickness of HTR-PM steam generator heat-exchanging component urceolus is 5mm (external diameter is 590mm), and the height of heat-exchanging component urceolus reaches 8.8 meters.How to produce the high accuracy urceolus of large diameter thin wall like this, by be one have to faced by problem.If adopt the manufacture of common seamless pipe, namely essence is pulled out or essence is pulled out, then cannot solve blank problem, and the cost manufactured will be very high.If adopt the manufacture of welded pipe, namely employing sheet material carries out the manufacture that roll bending adds welding, is difficult to again the physical dimension requirement meeting urceolus.
Just based on above-mentioned actual requirement of engineering; applicant proposes a kind of method for the accurate integer of heat-exchanging component urceolus; on the basis of welded pipe or on the basis of other roughing tubing, can guarantee that the physical dimension of heat-exchanging component urceolus meets the high accuracy of design by accurate integer.Because this production technology can adopt welded pipe, and the method for accurate integer is very simple again, significantly can reduce the manufacture difficulty of heat-exchanging component, and then reduces the manufacturing cost of urceolus.Meanwhile, it is fast that the process of accurate integer has very, like this for large-scale industrial production provides conveniently.
Summary of the invention
The technical problem to be solved in the present invention is under the environment of industrialization manufacture, how can produce the bigbore thin-walled high accuracy urceolus required by heat-exchanging component simply, to meet the needs of Practical Project.Specifically, the urceolus of heat-exchanging component has following requirement feature:
1) outer barrel diameter of heat-exchanging component is very large, much more than the 500mm of diameter.
2) very thin thickness of heat-exchanging component urceolus, is generally all no more than 10mm.
3) length of heat-exchanging component urceolus is all long, and length can reach several meters or tens of rice.
4) the size deviation requirement of heat-exchanging component is very high.For HTR-PM evaporator heat exchange assembly overcoat, its cylindricity and axis verticality are all no more than 0.5.
In order to solve above-mentioned processing and manufacturing problem, the invention provides a kind of method of being processed heat-exchanging component urceolus by accurate integer at that time, wherein main manufacturing procedure comprises:
For the stock of the heat-exchanging component urceolus obtained through pre-profiling, adopt the mode of shaped by fluid pressure or air-pressure forming by described stock integer to the precision needed.
Wherein, the uniform wall thickness of described stock, the external diameter of described stock is slightly less than the design external diameter of helix tube type heat-exchanging component urceolus, and the internal diameter of described stock is slightly less than the design internal diameter of helix tube type heat-exchanging component urceolus; Preferably, 1-10mm is less than.Stock can add welding by sheet material roll bending and carry out pre-profiling to the face of weld mode making weld seam flush with mother metal of polishing after welding; Also pre-profiling can be carried out by the mode of tubulation.
Further, the mode of shaped by fluid pressure or air-pressure forming is adopted described stock integer to be comprised the following steps to the precision needed:
Step 1: the processing of accurate integer frock;
Step 2: the stock being placed with leather bag is put into described accurate integer frock by inside again that leather bag is put into described stock, or, stock is put into described accurate integer frock and again leather bag is put into described stock;
Step 3: the two ends of described accurate integer frock are sealed; Liquid is filled with to described leather bag or gas is suppressed;
Step 4: carry out pressurize after the pressure of described leather bag is increased to the pressure of setting, certain hour is carried out in pressurize makes the barrel of described stock all surrender, thus described stock is obtained heat-exchanging component urceolus through shaped by fluid pressure or air-pressure forming; Pressure release is carried out again after certain hour described in pressurize; Preferably, 5-60min is carried out in pressurize;
Step 5: the two ends of opening described accurate integer frock;
Step 6: the described heat-exchanging component urceolus taken out containing described leather bag takes out described leather bag again from described heat-exchanging component urceolus from described accurate integer frock, or, from described heat-exchanging component urceolus, take out described leather bag from described accurate integer frock, take out described heat-exchanging component urceolus again.
Wherein, described accurate integer frock is the thick-walled pipe of both ends open, the cylindricity of its inwall and the linearity of axis meet the designing requirement of helix tube type heat-exchanging component urceolus, the design theory size of its internal diameter according to heat-exchanging component urceolus and the material characteristics profile theory calculate by integer stock obtain, or, obtained by test method; Concrete, the internal diameter of described accurate integer frock is determined by the springback capacity of integer stock after considering pressure release, and the design theory size that namely internal diameter of described accurate integer frock equals described helix tube type heat-exchanging component urceolus adds described springback capacity to determine; Described springback capacity after pressure release is determined by theory calculate, or, determined by the method for test.The two ends of described accurate integer frock can be utilize flange or other form to seal.
Preferably, Pressure gauge is set when suppressing for detecting corresponding liquid or gas pressure; Suppress the speed of boosting in process and be no more than 5MPa/S.
Preferably, corresponding liquid medium or gas medium is first discharged before taking out leather bag after pressure release.
Present invention also offers a kind of accurate integer frock for said method, it is the thick-walled pipe of both ends open; The cylindricity of its inwall and the linearity of axis meet the designing requirement of helix tube type heat-exchanging component urceolus; The design theory size of its internal diameter according to heat-exchanging component urceolus and the material characteristics profile theory calculate by integer stock obtain, or, obtained by test method; Its material is the material identical with described heat-exchanging component urceolus, or, select stainless steel.Concrete, determined by the springback capacity of integer stock after the design theory size that the internal diameter of described accurate integer frock equals described helix tube type heat-exchanging component urceolus adds pressure release; Described springback capacity after pressure release is determined by theory calculate, or, determined by the method for test.
Present invention also offers and process according to as above shaping method the helix tube type heat-exchanging component urceolus obtained.
The fabrication scheme of above-mentioned heat-exchanging component urceolus, can solve the processing problems of heat-exchanging component urceolus thoroughly.Allow heat-exchanging component urceolus when pre-profiling required precision is not high, ensured the required precision of final urceolus by the integer of precision.This process program not only processing cost is lower, and whole manufacture process is simple, easy to implement, is well suited for carrying out industrialized propagation and employment.At present, this manufacturing process has been applied in the processing of HTR-PM steam generator heat-exchanging component urceolus, and achieves extraordinary economic benefit and market effect.
Accompanying drawing explanation
Drawings illustrate the principle schematic that heat-exchanging component urceolus carries out accurate integer, in the industrial production of reality, can according to the condition of production of reality, can modify to the structural design of local, but the general principle of its integer can not change, namely the urceolus generation surrender of heat-exchanging component is made to realize accurate integer by applying interior pressure.
Fig. 1 is the schematic diagram of the accurate integer of heat-exchanging component urceolus.1 is accurate integer frock, and 2 is the heat-exchanging component urceolus of integer, and 3 is pressurization leather bag, and 4 is the connecting bolt of accurate integer frock both-end, and 5 is the end cap of accurate integer frock, and 6 fill Pai Kou for leather bag.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
With reference to accompanying drawing 1, the present embodiment idiographic flow is as follows: the processing of precision truing frock, the shaping of heat-exchanging component urceolus, leather bag is put into urceolus inside, heat-exchanging component urceolus and leather bag are put into accurate integer frock together, the two ends of frock carry out sealing, leather bag is suppressed the barrel of heat-exchanging component urceolus is all surrendered, keep certain hour after carry out pressure release, open the two ends of accurate integer frock, the urceolus taking out heat-exchanging component and leather bag, take out leather bag from the inside of heat-exchanging component urceolus.
First need to process accurate integer frock 1 (comprising the end cap 5 of accurate integer frock and the connecting bolt 4 of accurate integer frock both-end) according to the requirement of precision, be equipped with suitable pressurization leather bag 3 simultaneously.Meanwhile, the stock of the urceolus 2 of heat-exchanging component obtains through pre-profiling.
It will be understood by those skilled in the art that the pre-profiling of the processing of accurate integer frock 1 and the urceolus 2 of heat-exchanging component can be carried out simultaneously, also first can carry out any one.
The pre-profiling of heat-exchanging component urceolus stock can adopt the various manufacturing process of comparative maturity, but should ensure the uniform wall thickness of urceolus, and the deviation of its wall thickness is no more than 0.3mm.In order to carry out the accurate integer of urceolus, the urceolus external diameter of pre-profiling should be more smaller than the external diameter of name, preferably controls at 1-10mm.In order to reduce the manufacturing cost of heat-exchanging component urceolus, the mode that the original shaping method of heat-exchanging component urceolus adds welding by sheet material roll bending manufactures, and the mode of tubulation also can be adopted to be shaped.If adopt roll bending to add the mode of welding, need rational layout weld seam, make the length of weld seam unexpectedly possible little.And, need butt welded seam surface finish after welding, weld seam is flushed with mother metal.
Accurate integer frock 1 see Fig. 1 known be thick-walled pipe or the thick cylinder of both ends open, the cylindricity of its inwall and the linearity of axis meet the designing requirement of helix tube type heat-exchanging component urceolus, the design theory size of its internal diameter according to heat-exchanging component urceolus and the material characteristics profile theory calculate by integer stock obtain, or, obtained by test method.Concrete, the internal diameter of accurate integer frock 1 is determined by the springback capacity of integer stock after considering pressure release, and the springback capacity that the design theory size that namely internal diameter of accurate integer frock 1 equals helix tube type heat-exchanging component urceolus adds stock after pressure release in integer process is determined.Those skilled in the art utilize the knowledge of this area routine known, and namely the springback capacity after pressure release by being determined via theory calculate by the material characteristics profile of integer stock, or more simply, can also can be determined by the method for test.
And in order in integer process subsequently not heat exchanging assembly urceolus produce pollute, the material of accurate integer frock preferably selects the material identical with heat-exchanging component urceolus or stainless steel.
After accurate integer frock 1 machines, and after the stock of the heat-exchanging component urceolus obtained through pre-profiling, start to carry out accurate integer.Need before integer to arrange a pressurization leather bag 3 in the inside of heat-exchanging component urceolus.Leather bag 3 in the present invention is vitals, its role is to guarantee suppressing in process, and the pressure of liquid only acts on the inner side of heat-exchanging component urceolus, ensures the drying of heat-exchanging component inner core simultaneously, does not infiltrate in liquid medium.During accurate integer, first pressurization leather bag 3 is put in heat-exchanging component urceolus 2, then put in accurate integer frock 1 together with heat-exchanging component urceolus 2.Certainly, also first heat-exchanging component urceolus 2 can be put into accurate integer frock 1, then leather bag 3 is put among heat-exchanging component urceolus 2.
Then, the end cap 5 of accurate integer frock is connected to become a pressure-bearing obturator with accurate integer frock 1 by the connecting bolt 4 of both-end.In the present invention, owing to there is leather bag, less demanding to the sealing of accurate integer frock, but need the pressure bearing liquid.For convenience's sake, in the present embodiment, adopt flange to connect, adopt connecting bolt 4 fastening.
Then in leather bag, be filled with liquid by the row's mouth 6 that fills of leather bag, and boost to the force value of setting, then pressurize a period of time.The pressure being filled with liquid can be measured by Pressure gauge, and Pressure gauge can be arranged on pipeline.Conveniently, the liquid be filled with can select water.For the sake of security, the speed of boosting can not be too fast, can not more than 5MPa/S.
In order to the dimensionally stable of urceolus after ensureing integer, after requiring that fluid pressure reaches the pressure of setting, need the pressurize regular hour that the barrel of stock is all surrendered.The time of pressurize is preferably carrying out 5-60min, preferred about 30min.
After pressurize completes, fill row's mouth 6 by leather bag and liquid is discharged pressurization leather bag 3.Take out from accurate integer frock for the ease of urceolus, the pressure of liquid preferably all releases, and liquid preferably arranges light.
Be down to after atmospheric pressure until fluid pressure, just can open the end cap 5 of accurate integer frock.Then taken out from accurate integer frock 1 together with pressurization leather bag 3 by heat-exchanging component urceolus 2, the leather bag 3 that then will pressurize takes out from heat-exchanging component urceolus 2, just completes the accurate integer of heat-exchanging component urceolus 2.Certainly, heat-exchanging component urceolus 2 from heat-exchanging component urceolus 2, then takes out by the leather bag 3 that also can first just pressurize from accurate integer frock 1.
So just complete the accurate integer of heat exchanging assembly urceolus 2.Considered the resilience of heat-exchanging component urceolus stock after pressure release during internal diameter due to accurate integer frock 1 again, the linearity of the heat-exchanging component urceolus 2 therefore obtained not only cylindricity, axis meets design requirement, and internal-and external diameter also meets design requirement.
Be the mode adopting hydraulic pressure integer in above embodiment, be namely filled with liquid to boost in leather bag.Also can adopt the mode of air pressure integer, in leather bag, insufflation gas is boosted.The whole flow process of air pressure integer is identical with hydraulic pressure integer, does not repeat them here.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from the technology of the present invention principle; some improvement and replacement can also be made; be such as that conventional means is replaced, reconfigure one or more dependent claims, these improve and replace and also should be considered as protection scope of the present invention.
Claims (15)
1. for an accurate shaping method for helix tube type heat-exchanging component urceolus, it is characterized in that, for the stock of the heat-exchanging component urceolus obtained through pre-profiling, adopt the mode of shaped by fluid pressure or air-pressure forming by described stock integer to the precision needed.
2. as claimed in claim 1 for the accurate shaping method of helix tube type heat-exchanging component urceolus, it is characterized in that the uniform wall thickness of described stock, the external diameter of described stock is slightly less than the design external diameter of helix tube type heat-exchanging component urceolus, and the internal diameter of described stock is slightly less than the design internal diameter of helix tube type heat-exchanging component urceolus.
3., as claimed in claim 1 or 2 for the accurate shaping method of helix tube type heat-exchanging component urceolus, it is characterized in that described stock adds welding by sheet material roll bending and carrys out pre-profiling to the mode making weld seam flush with mother metal of polishing of the face of weld after welding.
4., as claimed in claim 1 or 2 for the accurate shaping method of helix tube type heat-exchanging component urceolus, it is characterized in that described stock carrys out pre-profiling by the mode of tubulation.
5., as claimed in claim 1 or 2 for the accurate shaping method of helix tube type heat-exchanging component urceolus, it is characterized in that the precision of described stock integer to needs comprises the following steps by the mode of described employing shaped by fluid pressure or air-pressure forming:
Step 1: the processing of accurate integer frock;
Step 2: the stock being placed with leather bag is put into described accurate integer frock by inside again that leather bag is put into described stock, or, stock is put into described accurate integer frock and again leather bag is put into described stock;
Step 3: the two ends of described accurate integer frock are sealed; Liquid is filled with to described leather bag or gas is suppressed;
Step 4: carry out pressurize after the pressure of described leather bag is increased to the pressure of setting, certain hour is carried out in pressurize makes the barrel of described stock all surrender, thus described stock is obtained heat-exchanging component urceolus through shaped by fluid pressure or air-pressure forming; Pressure release is carried out again after certain hour described in pressurize;
Step 5: the two ends of opening described accurate integer frock;
Step 6: the described heat-exchanging component urceolus taken out containing described leather bag takes out described leather bag again from described heat-exchanging component urceolus from described accurate integer frock, or, from described heat-exchanging component urceolus, take out described leather bag from described accurate integer frock, take out described heat-exchanging component urceolus again.
6. as claimed in claim 5 for the accurate shaping method of helix tube type heat-exchanging component urceolus, wherein said accurate integer frock is the thick-walled pipe of both ends open, the cylindricity of its inwall and the linearity of axis meet the designing requirement of helix tube type heat-exchanging component urceolus, the design theory size of its internal diameter according to heat-exchanging component urceolus and the material characteristics profile theory calculate by integer stock obtain, or, obtained by test method.
7. as claimed in claim 6 for the accurate shaping method of helix tube type heat-exchanging component urceolus, the internal diameter of wherein said accurate integer frock is determined by the springback capacity of integer stock after considering pressure release, and the design theory size that namely internal diameter of described accurate integer frock equals described helix tube type heat-exchanging component urceolus adds described springback capacity to determine; Described springback capacity after pressure release is determined by theory calculate, or, determined by the method for test.
8., as claimed in claim 5 for the accurate shaping method of helix tube type heat-exchanging component urceolus, wherein sealing the two ends of described accurate integer frock is utilize flange or other form to seal.
9., as claimed in claim 2 for the accurate shaping method of helix tube type heat-exchanging component urceolus, the internal diameter of wherein said stock is less than the design internal diameter 1-10mm of helix tube type heat-exchanging component urceolus.
10., as claimed in claim 5 for the accurate shaping method of helix tube type heat-exchanging component urceolus, wherein described leather bag is filled with when liquid or gas are suppressed and Pressure gauge is set for detecting corresponding liquid or gas pressure; Suppress the speed of boosting in process and be no more than 5MPa/S.
11. as claimed in claim 5 for the accurate shaping method of helix tube type heat-exchanging component urceolus, and it is carry out 5-60min that certain hour is carried out in wherein said pressurize.
12., as claimed in claim 5 for the accurate shaping method of helix tube type heat-exchanging component urceolus, first discharge corresponding liquid medium or gas medium before wherein taking out leather bag after pressure release.
13. 1 kinds, for the accurate integer frock of one of claim 1-12 method, is characterized in that, it is the thick-walled pipe of both ends open; The cylindricity of its inwall and the linearity of axis meet the designing requirement of helix tube type heat-exchanging component urceolus; The design theory size of its internal diameter according to heat-exchanging component urceolus and the material characteristics profile theory calculate by integer stock obtain, or, obtained by test method; Its material is the material identical with described heat-exchanging component urceolus, or, select stainless steel.
14. accurate integer frocks as claimed in claim 13, are determined by the springback capacity of integer stock after the design theory size that the internal diameter of wherein said accurate integer frock equals described helix tube type heat-exchanging component urceolus adds pressure release; Described springback capacity after pressure release is determined by theory calculate, or, determined by the method for test.
15. 1 kinds of helix tube type heat-exchanging component urceolus, is characterized in that being obtained by the method processing of one of claim 1-12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510056488.4A CN104646454B (en) | 2015-02-02 | 2015-02-02 | A kind of accurate shaping method for helix tube type heat-exchanging component outer barrel |
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| CN201510056488.4A CN104646454B (en) | 2015-02-02 | 2015-02-02 | A kind of accurate shaping method for helix tube type heat-exchanging component outer barrel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537321A (en) * | 2016-01-25 | 2016-05-04 | 天津工业大学 | Finishing device for barrel body |
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| JPH06198337A (en) * | 1993-01-08 | 1994-07-19 | Sumitomo Metal Ind Ltd | Method for correction welded steel tube |
| CN1274060A (en) * | 2000-02-16 | 2000-11-22 | 程宇鸣 | Expansion shaped insertion-type steel tubes for both flexible and rigid joining and its manufacture technology |
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Inventor after: Luo Xiaowei Inventor after: Wu Shenxin Inventor before: Luo Xiaowei Inventor before: Wu Xinshen |
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| GR01 | Patent grant |