CN105081705A - Method for manufacturing high-pressure spherical nitrogen storage tanks - Google Patents
Method for manufacturing high-pressure spherical nitrogen storage tanks Download PDFInfo
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- CN105081705A CN105081705A CN201510594928.1A CN201510594928A CN105081705A CN 105081705 A CN105081705 A CN 105081705A CN 201510594928 A CN201510594928 A CN 201510594928A CN 105081705 A CN105081705 A CN 105081705A
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- test
- lower hemisphere
- heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to a method for manufacturing high-pressure spherical nitrogen storage tanks. The method comprises the following steps of setting of wall thicknesses of upper and lower hemispheres; blanking and expansion calculation of the upper and lower hemispheres; blanking requirements for the upper and lower hemispheres; periphery forming of the upper and lower hemispheres; machining of forging parts; secondary machining of manholes and connection tubes after welding; assembly of manhole covers; final assembly and professional tooling; and thermal treatment and pressure resistant tests. According to the method, multiple difficulties in the machining process of spherical storage tanks in the prior art are overcome.
Description
Technical field
The present invention relates to a kind of preparation method of nitrogen basin, particularly relate to a kind of preparation method of high pressure nitrogen spheric holder.
Background technology
The usual shape of high pressure nitrogen basin has tubular and spherical two kinds, and high pressure nitrogen basin presented here mainly refers to high pressure nitrogen spheric holder.High-pressure bottle is mainly used in special industry, is the equipment needing particular pressure, has voltage stabilizing, buffering, and the effect such as dewater.High-pressure bottle is different from general steel vessel, and its application is not extensive, is only applied to the gun barrel of war industry, nuclear power unit and chemical industry, the high-pressure buffer of petroleum industry synthetic reaction and the nuclear reactor, electric storage means etc. of storage and power industry.But prior art, the critical technological point of processing high pressure nitrogen spheric holder is many, and major embodiment is as follows:
1. the setting of wall thickness;
2. the expansion of upper and lower hemisphere;
3. the secondary operations of manhole and adapter postwelding;
4. the assembling of manhole cover;
5. general assembly and self-made tooling;
6. heat treatment and withstand voltage test.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provide a kind of preparation method of high pressure nitrogen spheric holder, solve in prior art and process the many problems of spheric holder critical technological point.
Preparation method of the present invention comprises the steps:
Step 1, the setting of upper and lower hemisphere wall thickness:
Upper and lower hemisphere thickness of steel product equals nominal thickness and adds finish allowance, and upper and lower hemispherical head finish allowance is the reduction of seal head forming thickness, and reduction is 13% ~ 14% of steel plate nominal thickness;
Step 2, the blanking radius of upper and lower hemisphere:
Theoretical value adds technique additional amount, and hemisphere cake blanking radius formula is:
R=1.414r+2 δ n (nominal thickness)+50mm
Step 3, the blanking of upper and lower hemisphere requires:
(1) upper and lower hemisphere is first visited carrying out outside four limit 50mm of whole plate surpassing before launching line, do not allow the defect such as crackle, layering, can carry out after confirmation to be tested, during bulb line, first draw center line at sheet material, and then mark biscuit cylindrical, note abdicating 50mm apart from sheet material edge;
(2), when adopting gas flame cuttiug blanking, slag and objectionable impurities should be removed, and adopt emery wheel or other instruments to be processed by periphery smooth, expose metallic luster, need before gas flame cuttiug to be preheating to 125 DEG C;
Step 4, the outer committee of upper and lower hemisphere is shaping:
(1) hemispherical head HHA is shaping according to GB/T25198-2010 " pressure vessel head " standard press, does not allow piece; Need after hemispherical head is shaping to carry out normalizing heat treatment, and have the parent heat treatment test plant of heating process identical with hemispherical head; Carry out surperficial 100% Magnetic testing after hemispherical head is shaping, according to JB/T4730.4-2005 regulation evaluation rank be I grade qualified;
(2), during all retaining wall on slope, groove preset lines 100mm place carries out 100% ultrasonic examination, flawless, slag inclusion, crackle according to JB/T4730.3-2005 regulation; 100% Magnetic testing is carried out according to JB/T4730.4-2005, flawless after retaining wall on slope;
Step 5, forging machining:
Forging should meet III grade of requirement of NB/T47008-2010 defined, and groove carries out 100% infiltration/Magnetic testing by JB/T4730.5-2005, and I grade qualified; Forging will carry out stretching and summer ratio (v-notch) impact test (0 DEG C) AKv >=34J; Will carry out 100% ultrasound examination after forging roughing, II grade qualified; 100% infiltration/Magnetic testing is carried out by JB/T4730.5-2005 in forging process rear surface, and I grade qualified;
Step 6, the secondary operations of manhole and adapter postwelding:
According to GB150 and HG/T20583 requirement, after tank body and manhole or adapter assembly welding, reserve secondary operations allowance;
Step 7, the assembling of manhole cover:
Manhole cover is needed to load in episphere before upper and lower hemisphere general assembly, advanced pedestrian's port lid prepackage, after pre-installed position is determined, journal stirrup is located with episphere and welds, and then all for manhole cover connectors are removed, until upper and lower hemisphere general assembly and after heat-treating, in a dress tank inner surface sandblasting, eliminate rust, clean out after, again again by everyone port lid parts assembling, prepare the withstand voltage test carrying out subsequent processing;
Step 8, general assembly:
Upper and lower hemisphere carries out general assembly;
Step 9, heat treatment and withstand voltage test:
(1), during bulk heat treatmet, smear the anti-oxidation class paste of graphite to flange sealing surface, after heat treatment, sealing surface water is rinsed well;
(2) withstand voltage test
During the water pressure test, not mounting safety valve, relief valve port technique plug is closed, and after the water pressure test terminates, is installed by safety valve again, carry out air-tight test before air-tight test; Hydraulic test pressure: 20.63MPa, fluid temperature is 5 DEG C; Air tight test pressure: 16MPa.
Advantageous effect of the present invention is as follows:
1. the setting of the wall thickness fed intake is calculated accurately;
2. the expansion of upper and lower hemisphere is calculated accurately;
3. the secondary operations of manhole and adapter postwelding is completed accurately;
4. the assembling of manhole cover is completed accurately;
5. general assembly and self-made tooling is completed accurately;
6. heat treatment and withstand voltage test is completed accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of tun of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Detailed description of the invention
Referring to accompanying drawing, describe the present invention in detail.
The technology of the present invention setting parameter is as follows:
Step 1, the setting of upper and lower hemisphere wall thickness:
Thickness is the topmost structural parameters of pressure vessel, is under the load-up condition of regulation, ensures one of structural strength and the primary condition in the rigidity of structure and service life.Five kinds of thickness are defined in GB150, and the nominal thickness and the design thickness that only go out container wall thickness are usually given in design in drawings marked, thickness of steel product equals nominal thickness and adds finish allowance, hemispherical head finish allowance and seal head forming thickness thinning rate are generally 13% ~ 14% of steel plate thickness, the present embodiment is with the given nominal thickness of design drawing for 50mm, and radius r is 1000mm is example.
Reduction thickness 50mm × 0.13=6.5mm;
Draw steel plate Raising directly=nominal thickness 50mm+ reduction thickness 6.5mm=56.5mm;
After a rounding, thickness of steel product is 57mm; Because market does not have 57mm thick steel products;
After secondary rounding, thickness of steel product is 58mm.
Step 2, the blanking unfolding calculation of upper and lower hemisphere:
The blanking unfolding calculation of dome head is as follows.
Sphere area: 4 π r
2=π D
2
Hemisphere area: 4 π r
2÷ 2=2 π r
2
Hemisphere cake area: S=π R
2i.e. hemisphere cake area: S=π R
2=2 π r
2
∴ hemisphere cake radius R=1.414r=1.414 × 1000=1414
But this is just by calculating the theoretical value provided, can not as the blank size in production reality, also to add technique to the overall dimensions of additional amount guarantee hemispherical head.Therefore hemisphere cake blanking radius formula is:
R=1.414r+2 δ n (nominal thickness)+50mm
∴ hemisphere cake blanking: R=1.414 × 1000+2 × 50+50 ≈ 1565mm.
Step 3, the blanking of upper and lower hemisphere requires:
(1) upper and lower hemisphere is first visited carrying out outside four limit 50mm of whole plate surpassing before launching line, do not allow the defect such as crackle, layering, can carry out after confirmation to be tested, during bulb line, first draw center line at sheet material, and then mark biscuit cylindrical, note abdicating 50mm apart from sheet material edge.
(2), when adopting gas flame cuttiug blanking, slag and objectionable impurities should be removed, and adopt emery wheel or other instruments to be processed by periphery smooth, expose metallic luster, need before gas flame cuttiug to be preheating to 125 DEG C.
Step 4, the outer committee of upper and lower hemisphere is shaping:
(1) hemispherical head HHA is shaping according to GB/T25198-2010 " pressure vessel head " standard press, does not allow piece; Need after hemispherical head is shaping to carry out normalizing heat treatment, and have the parent heat treatment test plant of heating process identical with hemispherical head; Carry out surperficial 100% Magnetic testing after hemispherical head is shaping, according to JB/T4730.4-2005 regulation evaluation rank be I grade qualified.
(2), during all retaining wall on slope, groove preset lines 100mm place carries out 100% ultrasonic examination, flawless, slag inclusion, crackle according to JB/T4730.3-2005 regulation.100% Magnetic testing is carried out according to JB/T4730.4-2005, flawless after retaining wall on slope.
Step 5, forging machining:
Forging should meet III grade of requirement of NB/T47008-2010 defined, and groove carries out 100% infiltration/Magnetic testing by JB/T4730.5-2005, and I grade qualified; Forging will carry out stretching and summer ratio (v-notch) impact test (0 DEG C) AKv >=34J; Will carry out 100% ultrasound examination after forging roughing, II grade qualified; 100% infiltration/Magnetic testing is carried out by JB/T4730.5-2005 in forging process rear surface, and I grade qualified.
Step 6, the secondary operations of manhole and adapter postwelding:
According to GB150 and HG/T20583 requirement, after tank body and manhole or adapter assembly welding, also secondary operations problem to be considered.For stiffener and episphere assembly welding, consider to reserve secondary operations allowance from manufacturability: after stiffener (manhole) and episphere welding, also to carry out postwelding secondary operations, so not only require that technique is specially dated in forging work order, also will provide preliminary working allowance.The main cause of postwelding secondary operations is the through welding structure ensureing stiffener (manhole) or adapter.
Step 7, the assembling of manhole cover:
In high-pressure bottle, hermetically-sealed construction is comparatively special, does not adopt common Flange joint form, and adopts following seal form:
Manhole cover is needed to load in episphere before upper and lower hemisphere general assembly, advanced pedestrian's port lid prepackage, after pre-installed position is determined, journal stirrup is located with episphere and welds, and then all for manhole cover connectors are removed, until upper and lower hemisphere general assembly and after heat-treating, in a dress tank inner surface sandblasting, eliminate rust, clean out after, again again by everyone port lid parts assembling, prepare the withstand voltage test carrying out subsequent processing.
Step 8 general assembly and frock:
(1) group during general assembly is to size
Group is to gap: C=0+2
Unfitness of butt: b≤3.6mm
Angularity: E≤5.0mm
(2) frock
Ensure the air inlet of stretching out and outgoing gas connection tube flange size and parallel with spherical tank main shaft, be convenient to produce, effectively improve operating efficiency.
Step 9, heat treatment and withstand voltage test:
(1) for preventing flange sealing surface from producing the problems such as distortion, oxidation because of bulk heat treatmet; when bulk heat treatmet; must protect flange sealing surface, namely smear the anti-oxidation class paste of graphite to flange sealing surface, after heat treatment, sealing surface water is rinsed well.To hardness requirement HB≤235 of weld seam after heat treatment, heat affected area and connected mother metal thereof; Must not welding after equipment heat treatment.
(2) withstand voltage test
The position that Pressure gauge is laid to be noted during withstand voltage test, to be then placed at the bottom of tank deck and tank each one piece before two pieces of Pressure gauges test of spherical tank respectively, to observe the position of pressure change.
The Pressure gauge precision that high-pressure bottle uses is 1.6 grades, and dial plate diameter is 100mm, and Pressure gauge dial scale limiting value is 1.5 ~ 3.0 times of maximum working pressure, preferably selects 2 times.During the water pressure test, not mounting safety valve, relief valve port technique plug is closed, and after the water pressure test terminates, is installed by safety valve again, carry out air-tight test before air-tight test.
In process of the test, if noted abnormalities sound, pressure drop, pressure parts are obviously out of shape, paint flake, safety attachment lost efficacy, securing member damages or pilot system breaks down, during abnormality such as Pressure gauge indicated value inconsistent grade, test should be stopped immediately, and analyze reason.When internal tank has pressure, any repairing and fastening bolt work must not be carried out to pressure parts.Forbid to collide and Knock test container under test pressure.Without the detachable pilot system in pressure rear and interim annex in confirmation container.
Hydraulic test pressure: 20.63MPa, fluid temperature is 5 DEG C; Air tight test pressure: 16MPa.
Main pressurized element material of the present invention: sheet material: Q345R (normalizing)/GB713-2008; Forging: 16Mn III/NB/T47008-2010.
Main pressurized element sheet material should check plate surface quality and marking on materials one by one, Ying You steel mill quality of materials certificate; Steel plate should carry out ultrasound examination by JB/T4730.3-2005 one by one, and II grade qualified; A collection of with heat treated III grade of forging composition with smelting heat (batch) number, often criticize sampling observation one, carry out stretching and summer ratio (v-notch) impact test (0 DEG C) AKv >=34J; III grade of forging carries out ultrasound examination piece by piece, and II grade qualified.
Require during welding that banjo fixing butt jointing answers total cross-section through welding, the joint between adapter and housing adopts complete penetraction and fusion in welding pattern.Type of electrode:
(between pressure containing part): E4315 between Q345R or 16Mn III and carbon steel;
E5015 between low-alloy steel, (between nonpressure parts): E4303 between carbon steel;
Submerged automatic arc welding wire: H10Mn2, solder flux: SJ101.
Welding point Non-Destructive Testing:
A, category-B are undertaken by JB/T4730.2-2005, and detect length 100%, qualified rank RT is not less than AB level, II grade qualified after carry out UT and MT, UT and be not less than B level, I grade is qualified.
D class is undertaken by JB/T4730.5-2005, qualified rank MT, and 100%, I grade qualified.The attachment weld of manhole and episphere carries out UT, UT and is not less than B level, 100%, and I grade qualified.
Claims (4)
1. the preparation method of high pressure nitrogen spheric holder, is characterized in that comprising the steps:
Step 1, the setting of upper and lower hemisphere wall thickness, upper and lower hemisphere thickness of steel product equals nominal thickness and adds finish allowance, and upper and lower hemispherical head finish allowance is the reduction of seal head forming thickness, and reduction is 13% ~ 14% of steel plate nominal thickness;
Step 2, the blanking radius of upper and lower hemisphere, theoretical value adds technique additional amount, and hemisphere cake blanking radius formula is: R=1.414r+2 δ n(nominal thickness)+50mm;
Step 3, the blanking requirement of upper and lower hemisphere, upper and lower hemisphere is first visited carrying out outside four limit 50mm of whole plate surpassing before launching line, crackle, lamination defect are not allowed, can carry out after confirmation to be tested, first draw center line at sheet material during bulb line, and then mark biscuit cylindrical, note abdicating 50mm apart from sheet material edge;
When adopting gas flame cuttiug blanking, slag and objectionable impurities should be removed, and adopt emery wheel or other instruments to be processed by periphery smooth, expose metallic luster, need before gas flame cuttiug to be preheating to 125 DEG C;
Step 4, the outer committee of upper and lower hemisphere is shaping, and hemispherical head HHA is shaping according to GB/T25198-2010 " pressure vessel head " standard press, does not allow piece; Need after hemispherical head is shaping to carry out normalizing heat treatment, and have the parent heat treatment test plant of heating process identical with hemispherical head; Carry out surperficial 100% Magnetic testing after hemispherical head is shaping, according to JB/T4730.4-2005 regulation evaluation rank be I grade qualified;
During all retaining wall on slope, groove preset lines 100mm place carries out 100% ultrasonic examination, flawless, slag inclusion, crackle according to JB/T4730.3-2005 regulation; 100% Magnetic testing is carried out according to JB/T4730.4-2005, flawless after retaining wall on slope;
Step 5, forging machining, forging should meet III grade of requirement of NB/T47008-2010 defined, and groove carries out 100% infiltration/Magnetic testing by JB/T4730.5-2005, and I grade is qualified; Forging will carry out stretching and summer ratio (v-notch) impact test (0 DEG C) AKv >=34J; Will carry out 100% ultrasound examination after forging roughing, II grade qualified; 100% infiltration/Magnetic testing is carried out by JB/T4730.5-2005 in forging process rear surface, and I grade qualified;
Step 6, the secondary operations of manhole and adapter postwelding, according to GB150 and HG/T20583 requirement, reserves secondary operations allowance after tank body and manhole or adapter assembly welding;
Step 7, the assembling of manhole cover, load in episphere by manhole cover before upper and lower hemisphere general assembly, advanced pedestrian's port lid prepackage, after pre-installed position is determined, journal stirrup is located with episphere and welds, and then all for manhole cover connectors are removed, until upper and lower hemisphere general assembly and after heat-treating, in whole tank inner surface sandblasting, eliminate rust, clean out after, again again by everyone port lid parts assembling, prepare the withstand voltage test carrying out subsequent processing;
Step 8, general assembly, upper and lower hemisphere carries out general assembly;
Step 9, heat treatment and withstand voltage test, during bulk heat treatmet, smear the anti-oxidation class paste of graphite to flange sealing surface, after heat treatment, sealing surface water is rinsed well; During the water pressure test, not mounting safety valve, relief valve port technique plug is closed, and after the water pressure test terminates, is installed by safety valve again, carry out air-tight test before air-tight test; Hydraulic test pressure: 20.63MPa, fluid temperature is 5 DEG C; Air tight test pressure: 16MPa.
2. the preparation method of high pressure nitrogen spheric holder according to claim 1, is characterized in that in described step 8, and group during general assembly is to being of a size of, and group is to gap: C=0+2; Unfitness of butt: b≤3.6mm;
Angularity: E≤5.0mm; Ensure the air inlet of stretching out and outgoing gas connection tube flange size and parallel with spherical tank main shaft.
3. the preparation method of high pressure nitrogen spheric holder according to claim 1, is characterized in that in described step 9, to hardness requirement HB≤235 of weld seam after heat treatment, heat affected area and connected mother metal thereof; Must not welding after equipment heat treatment.
4. the preparation method of high pressure nitrogen spheric holder according to claim 1, is characterized in that in described step 9, during withstand voltage test, to be placed at the bottom of tank deck and tank each one piece before two pieces of Pressure gauges test of spherical tank respectively.
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| CN201510594928.1A CN105081705B (en) | 2015-09-17 | 2015-09-17 | The preparation method of high pressure nitrogen spheric holder |
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|---|---|---|---|
| CN201510594928.1A CN105081705B (en) | 2015-09-17 | 2015-09-17 | The preparation method of high pressure nitrogen spheric holder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342202A (en) * | 2018-11-22 | 2019-02-15 | 沈阳航天新光集团有限公司 | Visualize pressure-bearing test tool |
| CN109519541A (en) * | 2018-12-10 | 2019-03-26 | 航天晨光股份有限公司 | A kind of internal high-voltage manhole device and its open and close operating method |
| CN115673691A (en) * | 2022-11-16 | 2023-02-03 | 兰州空间技术物理研究所 | Propellant storage tank flange appearance and mounting hole precision mounting guaranteeing method |
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| US5659941A (en) * | 1991-02-01 | 1997-08-26 | Institut Francais Du Petrole | Process for manufacturing a light structure through the expansion of a metallic tank in an armored corrugated pipe |
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| CN115673691A (en) * | 2022-11-16 | 2023-02-03 | 兰州空间技术物理研究所 | Propellant storage tank flange appearance and mounting hole precision mounting guaranteeing method |
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| CN105081705B (en) | 2017-12-22 |
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Effective date of registration: 20180212 Address after: 110043 Liaoning Province, Shenyang City District East Street No. 3 Patentee after: SHENYANG AEROSPACE XINGUANG PRESSURE VESSEL Co.,Ltd. Address before: 110043 Liaoning Province, Shenyang City District East Street No. 1 Patentee before: SHENYANG AEROSPACE XINGUANG GROUP Co.,Ltd. |
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Granted publication date: 20171222 |