CN109813369A - A kind of the postwelding inspection and processing method of bellows - Google Patents
A kind of the postwelding inspection and processing method of bellows Download PDFInfo
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- CN109813369A CN109813369A CN201811600039.1A CN201811600039A CN109813369A CN 109813369 A CN109813369 A CN 109813369A CN 201811600039 A CN201811600039 A CN 201811600039A CN 109813369 A CN109813369 A CN 109813369A
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- bellows
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Abstract
Postwelding inspection and processing method the present invention provides a kind of bellows, it is characterised in that include the following steps: A. bellows surface inspection；B. corrugated pipe end plane inspection；C. critical size measures；D. test plate (panel) mechanics properties testing；E. ultrasonic examination is tested；F. quality test report is write；It is detected, is overcome because the problems such as product configurations are complicated, size is big, postwelding inspection caused by material parent surface requirements height is inconvenient, appearance test erroneous judgement by the appearance inspection method and weld properties of innovation.
Description
Technical field
The present invention relates to postwelding inspection technology fields, and in particular to a kind of the postwelding inspection and processing method of bellows.
Background technique
Bellows cost accounts for that total investment of engineering is few, but the reliability of its quality and safety are directly related to the peace of power generation
Row for the national games, manufacturing quality will more attract great attention.Structure is complicated for corrugated pipe products, this body weight weight, bore is big, three sides
It is bigger than normal in same type project compensation amount to being displaced, so it has to be ensured that the properties of product and index it is safe and reliable, setting
Certain safety coefficient must be taken into consideration in meter, manufacturing process, and to consider the dimensioning accuracy of the various components of on-site assembly,
It is also contemplated that used technique and welding method when site welding, to guarantee to examine an acceptance(check) after being completed.?
Since bellows is reinforced using 4 layers of superposition in practical manufacturing process, diameter reaches 11 meters, and bellows internal and external casing is all made of
Segmented welding group circle, product characteristic require welding process to need accurate control, if welding existing defects will will lead to great warp
Ji loss also results in postwelding and work is examined to there is inspection since product configurations are complicated, size is big, material parent surface requirements are high
Test the problems such as mobile inconvenient, appearance test of object is judged by accident.
Summary of the invention
To overcome the problems such as postwelding examines work inconvenient in the presence of inspection object movement, appearance test erroneous judgement in the prior art, originally
Invention provides the postwelding inspection and processing method of a kind of bellows.
The technical solution adopted by the present invention are as follows: a kind of the postwelding inspection and processing method of bellows include the following steps: A.
Bellows surface inspection；B. corrugated pipe end plane inspection；C. critical size measures；D. test plate (panel) mechanics properties testing；E. ultrasonic wave is visited
Wound test；F. quality test report is write.
In some preferred embodiments of the invention, the step A. visual examination includes following procedure:
A1. inspection of taking pictures is carried out to bellows surface using video camera, the bellows is set on Rolling base, the rolling
3 groups of idler wheels are installed on dynamic pedestal, the idler wheel drives the bellows to rotate coaxially, and the idler wheel revolving speed is 20 revs/min,
The video camera be set to bellows outside support on, the bracket can longitudinally be moved in parallel along bellows, the video camera away from
At bellows surface 1m, the video camera is equipped with wireless network transmissions equipment；The video camera is by the image transmitting of shooting to width
Panel type display, reviewer observe in real time, and can check bellows surface by the partial enlargement emphasis to image；
A2. the weld seam radian after the welding of template measuring bellow is utilized；Template chord length 2.0m, gap is at longitudinal seam seam
≤6mm。
In some preferred embodiments of the invention, the step B. bellows cross section is checked, using end surface measurement
Snap-gauge is close to corrugated pipe end plane and is slided one week, during which measures gap, the end surface measurement snap-gauge and bellows end using feeler gauge
Face gap L T.LT.LT 0.5mm, the corrugated pipe end plane height tolerance limit are ± 0.2mm.
In some preferred embodiments of the invention, the step C. dimensional gaughing includes following procedure:
C1. be using the limit deviation of the diameter of steel hand tape measuring bellow, the measured diameter and design diameter ±
2.5mm；
C2. 3 groups of circumference datums are measured using steel hand tape, the actual measurement circumference datum and the limit deviation of designed circumference are
8mm；
C3. inspection is compared to longitudinal seam using weld seam detection template, described weld seam detection template or so arc plate is close to
Ripple pipe outer wall, the elevation carrection thimble in the weld seam detection template groove are in weld seam middle position, the ripple
Height difference≤10% of pipe longitudinal seam and mother metal thickness, the bellows longitudinal seam and base material seamlessly transit, and surface color is silvery white
Color.
In some preferred embodiments of the invention, the test plate (panel) and the bellows are from same base material blanking；It is described
Test plate (panel) welding procedure and bellows-welding use same process, implement welding by organizing people together.
In some preferred embodiments of the invention, the test plate (panel) mechanics properties testing includes: that yield strength, pulling force are strong
Degree, elongation, hardness test.
In some preferred embodiments of the invention, the step E. ultrasonic examination test is 100% seam inspection.
In some preferred embodiments of the invention, the quality testing report includes the following contents: bellows surface
Examine record, corrugated pipe end plane that record, critical size is examined to examine record, the report of test plate (panel) quantitative measurement, seam inspection report
It accuses, above each report is both needed to reviewer, examines group leader, third-party intendance personnel signature.
In some preferred embodiments of the invention, the bellows material is 06Cr19Ni10, and wave mode is to reinforce U
Type, wave height 120mm, pitch of waves 80mm, single layer wall thickness are 2mm, and the number of plies is 4 layers, and wave number is 3.
In some preferred embodiments of the invention, the longitudinal seam groove is the 1/3 asymmetric X-shaped without root face, slope
Bicker degree is 60 °, is processed using 12 edge planers.
Compared with prior art, the beneficial effects of the present invention are: being carried out using video camera cooperation Rolling base to product outer
See and check, have operate conveniently, the advantage that testing accuracy is high, carry out having made special tooling when hydraulic pressure and air pressure are tested in product
Keep test more simple and reliable.
Detailed description of the invention
Fig. 1 is postwelding inspection and the processing method flow diagram of bellows；
Fig. 2 is bellows-welding schematic diagram.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment 1:
As shown in Figure 1, a kind of postwelding inspection of bellows and processing method, include the following steps: that A. bellows surface is examined
It looks into；B. corrugated pipe end plane inspection；C. critical size measures；D. test plate (panel) mechanics properties testing；E. ultrasonic examination is tested；F. it writes
Quality test report.
In some preferred embodiments of the invention, the step A. visual examination includes following procedure:
A1. inspection of taking pictures is carried out to bellows surface using video camera, the bellows is set on Rolling base, the rolling
3 groups of idler wheels are installed on dynamic pedestal, the idler wheel drives the bellows to rotate coaxially, and the idler wheel revolving speed is 20 revs/min,
The video camera be set to bellows outside support on, the bracket can longitudinally be moved in parallel along bellows, the video camera away from
At bellows surface 1m, the video camera is equipped with wireless network transmissions equipment；The video camera is by the image transmitting of shooting to width
Panel type display, reviewer observe in real time, and can check bellows surface by the partial enlargement emphasis to image；
A2. the weld seam radian after the welding of template measuring bellow is utilized；Template chord length 2.0m, gap is at longitudinal seam seam
≤6mm。
In some preferred embodiments of the invention, the step B. bellows cross section is checked, using end surface measurement
Snap-gauge is close to corrugated pipe end plane and is slided one week, during which measures gap, the end surface measurement snap-gauge and bellows end using feeler gauge
Face gap L T.LT.LT 0.5mm, the corrugated pipe end plane height tolerance limit are ± 0.2mm.
In some preferred embodiments of the invention, the step C. dimensional gaughing includes following procedure:
C1. be using the limit deviation of the diameter of steel hand tape measuring bellow, the measured diameter and design diameter ±
2.5mm；
C2. 3 groups of circumference datums are measured using steel hand tape, the actual measurement circumference datum and the limit deviation of designed circumference are
8mm；
C3. inspection is compared to longitudinal seam using weld seam detection template, described weld seam detection template or so arc plate is close to
Ripple pipe outer wall, the elevation carrection thimble in the weld seam detection template groove are in weld seam middle position, the ripple
Height difference≤10% of pipe longitudinal seam and mother metal thickness, the bellows longitudinal seam and base material seamlessly transit, and surface color is silvery white
Color.
In some preferred embodiments of the invention, the test plate (panel) and the bellows are from same base material blanking；It is described
Test plate (panel) welding procedure and bellows-welding use same process, implement welding by organizing people together.
In some preferred embodiments of the invention, the test plate (panel) mechanics properties testing includes: that yield strength, pulling force are strong
Degree, elongation, hardness test.
In some preferred embodiments of the invention, the step E. ultrasonic examination test is 100% seam inspection.
In some preferred embodiments of the invention, the quality testing report includes the following contents: bellows surface
Examine record, corrugated pipe end plane that record, critical size is examined to examine record, the report of test plate (panel) quantitative measurement, seam inspection report
It accuses, above each report is both needed to reviewer, examines group leader, third-party intendance personnel signature.
As shown in Fig. 2, the bellows material is 06Cr19Ni10, wave in some preferred embodiments of the invention
Type is to reinforce U-shaped, wave height 120mm, pitch of waves 80mm, and single layer wall thickness is 2mm, and the number of plies is 4 layers, and wave number is 3.It is described inside and outside
Casing material is 07MnMoVR, and the 07MnMoVR high-strength steel Mn content is 1.2%~1.6%, tensile strength reaches 630~
730MPa。
In some preferred embodiments of the invention, the longitudinal seam groove is the 1/3 asymmetric X-shaped without root face, slope
Bicker degree is 60 °, is processed using 12 edge planers.
Embodiment 2:
In quality inspection and acceptance
1) quality examination
Quality examination includes the work in raw material inspection, production quality inspection, anticorrosive quality inspection etc. and process control
Quality examination between sequence.Steel, welding material, connector and coating material needed for steel pipe manufacture and installation etc. should all be by related skill
Art clause and EJMA specification are tested and are checked and accepted.Should reinforce steel pipe production, welding and preservation process in each key procedure with
And the self-test work after the completion of manufacture, quality examination is submitted after qualified and checks and accepts data.
2) detection record
Detection record is the important means for supervising constructor to pay attention to quality, and the important evidence of evaluation construction quality.Often
A constructor, Quality Inspector and administrative staff will conscientiously fill in practical and realistic.Accomplish all information, does not leak item, restraining of stretching
The quality testing record content of work is shown in Table 1.
Table 1: telescopic joint production quality scope of examination table
For from manufacturing process:
(1) component blanking and processing
The inside and outside casing of Bellows expansion joint and pressing ring tile fragment blanking are using scribing line by hand, semi-automatic cutting, outer tube and pressure
The ring flat-plate of circle is cut with numerical control cutting machine, carries out polishing finishing with abrasive machine after cutting, and straight portion is dug using edge planer
Side, specific tolerance are met the requirements.
(2) roll bending and inspection
The components tile fragment roll bending such as inside and outside casing, pressing ring, end ring, first production inspection template, tile fragment complete the process on inspection
It carries out roll bending after qualification, after roll bending, tile fragment is freely stood on rigid plane, water (flow) direction checks radian, sample upward, with template
≤ 3mm is answered in the gap of plate and tile fragment, is not allow for sharp turn, while should carry out ground sample inspection, tile fragment to tile fragment in a free state
With ground sample phase tolerace 3mm.
(3) component groups circle is assembled
First rigid plane is leveled up before the inside and outside pipe sleeve and pressing ring of telescopic joint are assembled, guarantee rigid plane levelness a≤
Tile fragment is hung and carries out assembly by radius requirement (+2mm~+4mm) on rigid plane by 2mm, is in free shape when welding longitudinal joint
State.Longitudinal joint point with template checks commissure radian after being soldered, and≤3mm is answered in template and tile fragment gap；Check radius, perimeter, upper tube
Mouthful horizontal saliva is flat, height, nozzle concentricity, template and tile fragment gap, and passed examination is simultaneously welded after reinforcing reserved longitudinal joint.
(4) Member Welding
Welding method: the longitudinal joint of inner sleeve, outer tube, the butt weld and fillet weld of end ring, reinforcing ring, pressing ring are indulged
Seam, the butt weld of adapter tube and lifting lug use welding rod manual electric arc welding and submerged arc welding；The welding of bellows all uses tungsten
Electrode argon arc welding；The welding of the other components such as weld seam of ring flat-plate, the circumferential weld of retaining ring, gusset is welded using welding rod manual electric arc welding.
Welding contracted quantity and welding quality control measure: each component must be strictly controlled perimeter when making, therefore assembly must
Enough welding allowances for shrinkage must be reserved, and reserve 1 longitudinal joint in longitudinal seam welding to weld, circle to be strengthened is welded with adapter tube
After the completion, it checks and is welded again after tube coupling perimeter meets design requirement；To control welding deformation, sample is used at any time in welding process
Plate checks the radian of tube coupling and changes adjustment welding sequence according to radian；The welding of ring flat-plate, stiffening ring, stiffened panel, water seal retaining ring
Several equal portions are first divided into, positioning is then carried out and reinforces weldering, by 6 welders welding simultaneously when formal welding, when welding strictly presses pre-
The welding procedure and position of halving first formulated control welding deformation using means such as skip welding and multi-pass weldings.
(5) bellows assembling and welding
In bellows assembling process, bellows is the critical component of telescopic joint production, telescopic joint bellows assembling method
It is as follows:
Completely by inner sleeve and the surface derusting of end ring assembling, butting grooves cleaning, polishing；
Bellows bound using special hanger carry out on suspender lifting it is in place, with cork filler strip support pad, using fixture
Close up bellows, and prevents that electric arc causes to puncture to it；
It adjusts bellows and inner sleeve, end ring gap is uniform, and be close to, argon tungsten-arc welding carries out spot welding by hand.Spot welding
When with "painted-face" character in opera hammering beat, be adjacent to bellows with inner sleeve and outer tube end ring；
Point is soldered first bottoming, argon tungsten-arc welding bottom welding by hand, is then beaten with "painted-face" character in opera hammering, make bellows with it is interior
Casing and end ring are adjacent to, and are then welded and are examined by technique.
During bellows-welding, bellows-welding all uses argon tungsten-arc welding.Design parameter such as table 2,
Table 2: bellows-welding parameter list
(6) water pressure test
For the structure design of the quality, verifying telescopic joint of examining Bellows expansion joint to make, after telescopic joint completes
The water pressure test is carried out to bellows as required.
Method particularly includes: utilize 40mm, material is that Q345R plate volume is set to and suppresses steel plate (outer diameter is flexible less than bellows
Saving internal diameter is about 20mm), it is inserted in inside telescopic joint, and 10mm technique backing plate is added between the two, then carries out suppressing test.It surveys
It is cut off after the completion of examination using carbon arc air gouging and suppresses steel band, and integrally polished.It can avoid injury base material.Point Upstream section and tract into
Row hydraulic test.
It is suppressing in steel plate, reinforcement is supported using doughnut-shaped steel plate, is easy to implement, material economy, reinforcing ring and branch
It supports reusable.The sectional that such as goes wrong carries out repairing and repair welding.
Consider that the economic cost for suppressing inner sleeve is done using " external pressure cylinder is arranged stiffening ring and calculates " to inner sleeve is suppressed
Wall thickness reduction increases stiffening ring and reinforces the design of support.
(7) sealing performance: the sealing performance of telescopic joint should be tested by air-tightness or kerosene leak test, and test is answered
Meet Section of 7.2 requirement of EJMA, test result should meet following requirements.
Test(ing) medium is clean air, and the design pressure that test pressure is 1.0 times slowly boosts to the examination of design code
After testing pressure and holding pressure 10min, ne-leakage is answered on inspection.
(8) sequence is suppressed:
A. normal-temperature water is injected, access is suppressed equipment and suppressed after filling.
B. sealing test: being suppressed using hydraulic test pump, when pressure reaches 1.65MPa, closes water injection valve, pressure maintaining
10min carries out comprehensively careful visual circular test to wave shell surface and its longitudinal seam, girth joint using 5 times of magnifying glasses.
C. hydraulic pressure test: after the sealing test of 1.65MPa, water injection valve is opened, hydraulic pressure is slowly rushed on 1.65MPa
2.5MPa is risen to, then turns off water injection valve, pressure maintaining 20min, this again with 5 times of magnifying glasses, to wave shell surface and its is indulged in the process
Weld seam, girth joint carry out comprehensively careful visual circular test, no to seep water, without deformation.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (10)
1. a kind of postwelding inspection of bellows and processing method, characterized by the following steps:
A. bellows surface inspection；
B. corrugated pipe end plane inspection；
C. critical size measures；
D. test plate (panel) mechanics properties testing；
E. ultrasonic examination is tested；
F. quality test report is write.
2. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the step A.
Visual examination includes following procedure:
A1. inspection of taking pictures is carried out to bellows surface using video camera, the bellows is set on Rolling base, the rolling bottom
3 groups of idler wheels are installed, the idler wheel drives the bellows to rotate coaxially, and the idler wheel revolving speed is 20 revs/min, described on seat
Video camera is set on bellows outside support, the bracket can longitudinally be moved in parallel along bellows, and the video camera is away from ripple
At pipe surface 1m, the video camera is equipped with wireless network transmissions equipment；The video camera shows the image transmitting of shooting to widescreen
Show device, reviewer observes in real time, and can check bellows surface by the partial enlargement emphasis to image；
A2. the weld seam radian after the welding of template measuring bellow is utilized；Template chord length 2.0m, gap at longitudinal seam seam≤
6mm。
3. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the step B.
Bellows cross section checks, is close to corrugated pipe end plane using end surface measurement snap-gauge and slides one week, during which using between feeler gauge measurement
Gap, the end surface measurement snap-gauge and corrugated pipe end plane gap L T.LT.LT 0.5mm, the corrugated pipe end plane height tolerance limit is ±
0.2mm。
4. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the step C.
Dimensional gaughing includes following procedure:
It C1. is ± 2.5mm using the limit deviation of the diameter of steel hand tape measuring bellow, the measured diameter and design diameter；
C2. 3 groups of circumference datums are measured using steel hand tape, the circumference datum and the limit deviation of designed circumference of surveying is 8mm；
C3. inspection is compared to longitudinal seam using weld seam detection template, described weld seam detection template or so arc plate is close to ripple
Pipe outer wall, the elevation carrection thimble in the weld seam detection template groove are in weld seam middle position, and the bellows is vertical
Height difference≤10% of weld seam and mother metal thickness, the bellows longitudinal seam and base material seamlessly transit, and surface color is silvery white.
5. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the test plate (panel) with
The bellows is from same base material blanking；The test plate (panel) welding procedure and bellows-welding use same process, by organizing people's reality together
Welding connects.
6. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the test plate (panel) power
Learning performance detection includes: yield strength, tension intensity, elongation, hardness test.
7. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the step E.
Ultrasonic examination test is 100% seam inspection.
8. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the quality inspection
Observe and predict announcement and include the following contents: bellows surface examines record, corrugated pipe end plane that record, critical size is examined to examine record, examination
The report of plate quantitative measurement, seam inspection report, above each report are both needed to reviewer, examine group leader, third-party intendance people
Member's signature.
9. the postwelding inspection and processing method of a kind of bellows according to claim 1, it is characterised in that: the bellows
Material is 06Cr19Ni10, and wave mode is to reinforce U-shaped, wave height 120mm, and pitch of waves 80mm, single layer wall thickness is 2mm, and the number of plies is 4 layers,
Wave number is 3.
10. the postwelding inspection and processing method of a kind of bellows according to claim 2, it is characterised in that: the vertical weldering
Stitching groove is the 1/3 asymmetric X-shaped without root face, and bevel angle is 60 °, is processed using 12 edge planers.
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| CN201811600039.1A CN109813369A (en) | 2018-12-26 | 2018-12-26 | A kind of the postwelding inspection and processing method of bellows |
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| CN201811600039.1A CN109813369A (en) | 2018-12-26 | 2018-12-26 | A kind of the postwelding inspection and processing method of bellows |
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Application publication date: 20190528 |