CN108050332B - A kind of steam pipework thermal compensation device and its design method with heat shock resistance effect - Google Patents
A kind of steam pipework thermal compensation device and its design method with heat shock resistance effect Download PDFInfo
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- CN108050332B CN108050332B CN201711320955.5A CN201711320955A CN108050332B CN 108050332 B CN108050332 B CN 108050332B CN 201711320955 A CN201711320955 A CN 201711320955A CN 108050332 B CN108050332 B CN 108050332B
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- pipe
- steam pipework
- loopful shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
Abstract
The present invention relates to a kind of steam pipework thermal compensation devices with heat shock resistance effect, including loopful shape compensation pipe, reducer pipe and flange, loopful shape compensation pipe is spiral shape, the diameter that loopful shape compensates pipe is greater than the diameter of corresponding steam pipework, it is connected respectively by variable diameter tube transitions between the inlet and outlet both ends and steam pipework of loopful shape compensation pipe, flange is respectively set in the end of reducer pipe, and thermal compensation device is connect by flange with steam pipework.Thermal compensation device of the invention can fully absorb steam pipework expanded by heating using the natural compensation structure of loopful shape pipe and the thermal stress that generates, additionally it is possible to reduce the impetus of thermal shock, and the radial thermal shock power generated in loopful shape pipe is cancelled out each other；Meanwhile increasing the specification of loopful shape compensation pipe, loopful shape compensates pipe and carries out dilatation, and then increases the buffering inertia of steam pipework thermal shock, further improves thermal shock resistance.
Description
Technical field
The present invention relates to naval vessel steam power system design fields, and in particular to a kind of with heat shock resistance effect
Steam pipework thermal compensation device and its design method.
Background technique
Marine vapor accumulator be in a very short period of time for the great steam user of instantaneous steam consumption provide authorized pressure and
The energy storage device of temperature steam, for conveying motive force to ship large size steam power device users.Steam accumulator fills Steam discharge process
Along with heating power load impact type large disturbances, with the charge and discharge vapour time is extremely short, instantaneous steam flow is very big, thermal parameter fluctuation
Very big feature.It is filling, in Steam discharge process, charge and discharge vapor pipeline bears the steam accumulator boundary that instantaneously big load thermal shock disturbs
Excitation causes the pressure field and velocity field of steam in steam pipework to generate violent dither, easily causes Flow vibration and lure
The damage of the first-class crucial attachment of valve, tee tube, the quarter bend installed on hair pipeline.Meanwhile in narrow installation space, steam
Need to be arranged the bend pipe of multiple groups " π " shape on vapor pipeline, although the thermal stress that the thermal expansion of high-temperature steam pipeline generates can be absorbed,
But the impetus for increasing steam at high thermal shock tube wall expands the indirect impact of big load thermal shock.It is land at certain
During debugging is tested, excessive loads thermal shock, which occurs, leads to steam charge and discharge vapor pipeline " getting rid of pipe " phenomenon.
Therefore, it is the operational safety for ensureing big load disturbance charge and discharge vapor pipeline conscientiously, needs to propose a kind of with heat resistanceheat resistant punching
The steam pipework thermal compensation device for hitting effect can effectively prevent big load thermal shock, and absorb high-temperature steam pipeline thermal stress,
Adaptability improves integration, reliability and the maintainability of vapour system pipeline and attachment simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the deficiency of the prior art, providing a kind of with heat resistanceheat resistant
The steam pipework thermal compensation device and its design method of percussion, big load charge and discharge vapor pipeline heat punching can be effectively prevented in it
It hits, and absorbs the thermal stress of high-temperature steam pipeline, while improving the integrated level and reliability of vapour system pipeline and attachment.
The present invention is technical solution used by solving technical problem set forth above are as follows:
A kind of steam pipework thermal compensation device with heat shock resistance effect, including loopful shape compensation pipe, reducer pipe and method
Orchid, the loopful shape compensation pipe is spiral shape, and the diameter of the loopful shape compensation pipe is greater than the diameter of corresponding steam pipework, described
Loopful shape is compensated and is connected respectively by the variable diameter tube transitions between the inlet and outlet both ends and the steam pipework of pipe, described
The flange is respectively set in the end of reducer pipe, and the thermal compensation device is connect by the flange with steam pipework.
In above scheme, the loopful shape compensation pipe, reducer pipe and flange welding become one.
In above scheme, the airflow direction of the loopful shape compensation pipe from left to right is counterclockwise, air-flow from right to left
Direction is clockwise.
In above scheme, the maximum outer dimension of the loopful shape compensation pipe is 2.4m × 1.2m × 1.4m.
In above scheme, the material of the thermal compensation device selects 12Cr1MoV.
The invention also provides the design methods of the above-mentioned steam pipework thermal compensation device with heat shock resistance effect, including
Following steps:
The first step fits the estimation formula of loopful shape compensation pipe according to pressure pipeline stress analysis and vibration principle
(1), the surge volume of the loopful shape compensation pipe is calculated:
V=(200K γ Vk)/Pmax (1)
In formula, V indicates surge volume, m3；K indicates isentropic Compression index；γ indicates engineering correction factor；VkIndicate steam
Volume, m3；PmaxIndicate operation maximum pressure, MPa；
Second step estimates that the loopful shape compensates the elbow radius of pipe by Fitting Engineering empirical equation (2):
In formula, RIt is curvedIndicate the elbow radius of loopful shape compensation pipe, m；V indicates surge volume, m3；DRingIndicate loopful shape compensation
The diameter of pipe, m.
The beneficial effects of the present invention are:
Thermal compensation device of the invention includes spiral helicine loopful shape compensation pipe, utilizes the natural compensation structure of loopful shape pipe
The thermal stress that steam pipework expanded by heating can be fully absorbed and generated, additionally it is possible to reduce the impetus of thermal shock, and will be complete
The radial thermal shock power generated in ring pipe is cancelled out each other.Meanwhile increasing the specification of loopful shape compensation pipe, loopful shape compensation
Pipe carries out dilatation, and then increases the buffering inertia of steam pipework thermal shock, further improves thermal shock resistance.In addition, will
The import and export both ends of loopful shape compensation pipe pass through reducer pipe and flange welding respectively, are integrated in a set of single unit system, improve the dress
The integration and flexible arrangement set.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the main view for the steam pipework thermal compensation device that the present invention has heat shock resistance effect；
Fig. 2 is the left view of thermal compensation device shown in Fig. 1.
In figure: 100, thermal compensation device；10, loopful shape compensation pipe；11, import；12, it exports；20, reducer pipe；30, method
It is blue；200, steam pipework.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
As shown in Figs. 1-2, it is a preferred embodiment of the present invention the steam pipework thermal compensation dress with heat shock resistance effect
100 are set, including loopful shape compensation pipe 10, reducer pipe 20 and flange 30, loopful shape compensate pipe 10 and design by reasonable elbow radius
Helically, the heat that 200 expanded by heating of steam pipework can be fully absorbed using the natural compensation structure of loopful shape pipe and generated
Stress, additionally it is possible to reduce the impetus of thermal shock, and the radial thermal shock power generated in loopful shape pipe is cancelled out each other.Loopful
The diameter that shape compensates pipe 10 is greater than the diameter of corresponding steam pipework 200, and loopful shape compensates 12 both ends of import 11 and outlet of pipe 10
It is connect respectively by 20 transition of reducer pipe between steam pipework 200, the specification of pipe 10 is compensated by increasing loopful shape, it is right
Loopful shape compensates pipe 10 and carries out dilatation, and then increases the buffering inertia of 200 thermal shock of steam pipework, further improves heat resistanceheat resistant punching
Hit ability.The end of reducer pipe 20 is respectively welded flange 30, and loopful shape compensation pipe 10, reducer pipe 20 and flange 30 are integrated in one
Single unit system is covered, the integration and flexible arrangement of thermal compensation device 100 are improved.Thermal compensation device 100 is by flange 30 and steams
Vapor pipeline 200 connects.
Thermal compensation device 100 of the invention is mainly used for the charge and discharge vapour system pipeline of large disturbances steam accumulator.In steam
During accumulator charge and discharge vapour, the thermal compensation device 100 can alleviate big flow high temperature and high pressure steam pipeline is generated it is instantaneous
Big load thermal shock, and steam pipework thermal stress is absorbed based on natural compensation, ensure the security reliability of steam accumulator operation.
It advanced optimizes, in the present embodiment, it is counterclockwise, Cong Youzhi that loopful shape, which compensates the airflow direction of pipe 10 from left to right,
Left airflow direction be it is clockwise, ship cabin arrangement space can be saved.In the present embodiment, left end is import 11, and right end is outlet
12, the airflow direction of import 11 to outlet 12 is counterclockwise.In other embodiments, if import in right end, outlet in left end,
Airflow direction is clockwise.
It advanced optimizes, in the present embodiment, the maximum outer dimension that loopful shape compensates pipe 10 is 2.4m × 1.2m × 1.4m.
It advanced optimizes, in the present embodiment, the material of thermal compensation device 100 selects 12Cr1MoV.
The invention also provides the design method of the above-mentioned steam pipework thermal compensation device 100 with heat shock resistance effect,
The following steps are included:
The first step fits the estimation formula of loopful shape compensation pipe 10 according to pressure pipeline stress analysis and vibration principle
(1), the surge volume of loopful shape compensation pipe 10 is calculated:
V=(200K γ Vk)/Pmax (1)
In formula, V indicates surge volume, m3；K indicates isentropic Compression index；γ indicates engineering correction factor；VkIndicate steam
Volume, m3；PmaxIndicate operation maximum pressure, MPa.
Second step estimates that loopful shape compensates the elbow radius of pipe 10 by Fitting Engineering empirical equation (2):
In formula, RIt is curvedIndicate the elbow radius of loopful shape compensation pipe 10, m；V indicates surge volume, m3；DRingIndicate that loopful shape is mended
Repay the diameter of pipe 10, m.
About the Selection and Design of reducer pipe 202 and flange 303, using " DS102-STD-001 pipe fitting standard manual peculiar to vessel "
It carries out, details are not described herein.
There is the validity of the steam pipework thermal compensation device 100 of heat shock resistance effect in order to illustrate the present invention, now choose
The vapor pipeline that fills of steam accumulator that is typical, simplifying is example (as shown in Figs. 1-2), is specifically calculated and is analyzed:
1) surge volume of loopful shape compensation pipe 10 is calculated:
According to the operation for filling vapor pipeline of steam accumulator and structural parameters it is found that T=350 DEG C of vapor (steam) temperature, vapour pressure
Power Pmax=5.7MPa, fills vapour mass M=10kg, and loopful shape compensates 10 diameter D of pipeRing=0.4m.
According to the running temperature and pressure of steam, looks into and take IAPWS-IF87 water and steam property list, it is known that vapour density ρ
=22.3kg/m3, vapour volume Vk=M/ ρ=10/22.3=0.45m3。
IAPWS-IF87 water and steam property list is taken using looking into, determines isentropic Compression index K=1.284, and by engineering
Correction factor γ value is 0.01.
According to formula (1), surge volume:
V=(200K γ Vk)/Pmax=(200 × 1.284 × 0.01 × 0.45)/5.7=0.21m3
2) diameter of loopful shape compensation pipe 10 is calculated:
According to formula (2), loopful shape compensates the diameter of pipe 10:
DIt is curved=2RIt is curved=2 × 2 × 0.21/3.142/0.42=0.5m
3) calculating stress and frequency, and and standard comparing:
The thermal stress of compensation device is calculated using CEASAR software, calculated result shows: maximum primary stress is 28MPa,
Allowable stress less than 98MPa meets primary stress requirement；Maximum secondary stress is 65MPa, and allowable less than 267MPa is answered
Power meets secondary stress requirement；Single order eigentone is 1.12Hz, is far below 31.3Hz, meets the vibration of steam pipework mode
It is dynamic to require.
In conclusion natural compensation pipe structure (the i.e. loopful shape compensation of thermal compensation device 100 of the invention using loopful shape
Pipe 10) fully absorb 200 expanded by heating of steam pipework and the thermal stress that generates, while the impetus of thermal shock is reduced, mutually support
The loopful shape that disappears compensates the radial thermal shock power that pipe 10 generates.In addition, the dilatation in conjunction with thermal compensation device 100 designs, increase steam
The buffering inertia of 200 thermal shock of pipeline, improves the thermal shock resistance of steam pipework 200.Meanwhile loopful shape being compensated and is managed
10,30 integrated design of reducer pipe 20 and connecting flange, improve steam pipework 200 design integration and arrangement it is flexible
Property.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (6)
1. a kind of steam pipework thermal compensation device with heat shock resistance effect, which is characterized in that including loopful shape compensation pipe, become
Diameter pipe and flange, the loopful shape compensation pipe is spiral shape, and the diameter of the loopful shape compensation pipe is greater than corresponding steam pipework
Diameter passes through the variable diameter tube transitions between the inlet and outlet both ends and the steam pipework of the loopful shape compensation pipe respectively
The flange is respectively set in connection, the end of the reducer pipe, and the thermal compensation device is connected by the flange and steam pipework
It connects.
2. the steam pipework thermal compensation device according to claim 1 with heat shock resistance effect, which is characterized in that described
Loopful shape compensation pipe, reducer pipe and flange welding become one.
3. the steam pipework thermal compensation device according to claim 1 with heat shock resistance effect, which is characterized in that described
Loopful shape compensation pipe airflow direction from left to right be it is counterclockwise, airflow direction from right to left is clockwise.
4. the steam pipework thermal compensation device according to claim 1 with heat shock resistance effect, which is characterized in that described
The maximum outer dimension that loopful shape compensates pipe is 2.4m × 1.2m × 1.4m.
5. the steam pipework thermal compensation device according to claim 1 with heat shock resistance effect, which is characterized in that described
The material of thermal compensation device selects 12Cr1MoV.
6. the design method of the steam pipework thermal compensation device according to claim 1 with heat shock resistance effect, special
Sign is, comprising the following steps:
The first step fits the estimation formula (1) of loopful shape compensation pipe, meter according to pressure pipeline stress analysis and vibration principle
Calculate the surge volume of the loopful shape compensation pipe:
V=(200K γ Vk)/Pmax (1)
In formula, V indicates surge volume, m3；K indicates isentropic Compression index；γ indicates engineering correction factor；VkIndicate vapour volume,
m3；PmaxIndicate operation maximum pressure, MPa；
Second step estimates that the loopful shape compensates the elbow radius of pipe by Fitting Engineering empirical equation (2):
In formula, RIt is curvedIndicate the elbow radius of loopful shape compensation pipe, m；V indicates surge volume, m3；DRingIndicate loopful shape compensation pipe
Diameter, m.
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| CN201711320955.5A CN108050332B (en) | 2017-12-12 | 2017-12-12 | A kind of steam pipework thermal compensation device and its design method with heat shock resistance effect |
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| CN108050332B true CN108050332B (en) | 2019-10-25 |
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| CN110260160B (en) * | 2019-05-20 | 2021-06-04 | 中国神华能源股份有限公司 | Steam pipeline and power generation system |
| CN114076258A (en) * | 2021-11-18 | 2022-02-22 | 湘潭大学 | Material slurry conveying pipeline deceleration energy dissipation regulating system |
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| CN1120115A (en) * | 1993-10-27 | 1996-04-10 | J·莱尔·金特 | Vapor-air steam engine |
| CN2532349Y (en) * | 2002-01-15 | 2003-01-22 | 史玉芳 | O-shape compensator for pipeline |
| GB2393230A (en) * | 2001-08-29 | 2004-03-24 | Abb As Abb Offshore Systems | Pipe system for underwater installations with expansion-compensating bellows |
| CN201475579U (en) * | 2009-08-25 | 2010-05-19 | 秦皇岛宏岳塑胶有限公司 | Expansion ring for plastic pipeline |
| CN102003593A (en) * | 2010-12-13 | 2011-04-06 | 浙江银轮机械股份有限公司 | Corrugated tube and helix tube combined displacement compensator |
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2017
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| CN1120115A (en) * | 1993-10-27 | 1996-04-10 | J·莱尔·金特 | Vapor-air steam engine |
| GB2393230A (en) * | 2001-08-29 | 2004-03-24 | Abb As Abb Offshore Systems | Pipe system for underwater installations with expansion-compensating bellows |
| CN2532349Y (en) * | 2002-01-15 | 2003-01-22 | 史玉芳 | O-shape compensator for pipeline |
| CN201475579U (en) * | 2009-08-25 | 2010-05-19 | 秦皇岛宏岳塑胶有限公司 | Expansion ring for plastic pipeline |
| CN102003593A (en) * | 2010-12-13 | 2011-04-06 | 浙江银轮机械股份有限公司 | Corrugated tube and helix tube combined displacement compensator |
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