CN103994930B - Be used for the method that cylindrical pressure gas cylinder or pressure pipeline carry out pressure test - Google Patents
Be used for the method that cylindrical pressure gas cylinder or pressure pipeline carry out pressure test Download PDFInfo
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Abstract
A kind of method of carrying out pressure test for pressure cylinder or pressure pipeline. It is included on the outer circumference surface of cylindrical pipeline section on pressure cylinder or pressure pipeline restraint device is set, and utilizes restraint device to exert pressure to cylindrical pipeline section or pressure pipeline outer circumference surface; Utilization is suppressed equipment by the annular seal space of water under high pressure injection pressure gas cylinder or pressure pipeline, and keeps constant voltage a period of time, to check whether test specimen damages or occur the steps such as abnormal. The present invention is installed restraint device additional on the outer circumference surface of cylindrical pipeline section or pressure pipeline on pressure cylinder, to reduce cylindrical pipeline section or pressure pipeline suffered circumferential stress when the water pressure test, in the water pressure test, just can adopt so higher hydraulic test pressure, not only can avoid hydraulic test pressure value too high and cylindrical pipeline section or pressure pipeline are produced circumferentially break, but also can detect the circumferential defect, the bottle end and the defect of bottle head or the circumferential defect of pressure pipeline that are present in the cylindrical pipeline section of pressure cylinder.
Description
Technical field
The invention belongs to cylindrical pressure gas cylinder or pressure pipeline detection technique field, particularly relate to oneBe used for the method that cylindrical pressure gas cylinder or pressure pipeline carry out pressure test.
Background technology
The pressure that bears of cylindrical pressure gas cylinder or pressure pipeline is its important technical indicator. In order to ensureIt can normally be worked, conventionally all must be to it in the periodic maintenance inspection work before dispatching from the factory or after dispatching from the factoryCarry out the water pressure test. Fig. 1 is a kind of at present conventional cylindrical pressure gas cylinder structure while carrying out the water pressure testSchematic diagram. As shown in Figure 1, this cylindrical pressure gas cylinder mainly by the bottom of bottle 1, cylindrical pipeline section 2 andBottle 3 three parts compositions, and bottle 3 is provided with liquid in-out mouth 4, the wherein length of cylindrical pipeline section 2L > 1.5D, D is the diameter of cylindrical pipeline section 2. Conventional water pressure test way is at present: if test specimen is for pressingHydraulic piping, first by its two ends shutoff, forms an annular seal space therein thus, and reserved one is enteredLiquid outlet, then by the special equipment of suppressing a(such as hydraulic dynamometer) with pressure cylinder or force pipeLiquid in-out mouth on road connects, and utilizes and suppresses the annular seal space of equipment a to pressure cylinder or pressure pipeline afterwardsInterior injection water under high pressure, make annular seal space internal pressure be increased to hydraulic test pressure Ph (conventionally get Ph=1.5Pg,Pg is the nominal operating pressure of pressure cylinder or pressure pipeline), and keep constant voltage a period of time, to checkWhether test specimen damages or occurs extremely, and judges that according to result of the test this pressure cylinder or pressure pipeline areNo can continuation used.
If there is birth defect or processing familiar lacunas, available lacking in the inside of pressure cylinder or pressure pipelineFall into the order of severity that coefficient Cf represents defect, Cf=0 represents zero defect, and Cf=1 represents to damage completely.The modal crackle that takes the form of of defect, crackle is longer, darker, and Cf is larger for defect coefficient. In addition,Pressure cylinder or pressure pipeline in use the defect on it can progressively develop become large until break orExplosion, the speed Vf of development of defects depends primarily on two parameters: defect coefficient Cf and fault location are sufferedStress σ, i.e. Vf=f (σ, Cf). In the time that pressure pipeline or pressure cylinder are carried out to the water pressure test, ifInternal pressure is certain, and the position of stressed maximum is the circumferential of cylindrical pipeline section, circumferentially should thereby producePower σ c. When the axial flaw of cylindrical pipeline section or the defect coefficient Cf of crackle is excessive and while exceeding certain value,Test specimen just can produce and circumferentially breaks or break; But, due to the bottle end 1, bottle 3 possibility on pressure cylinderHaving major defect, also likely there is serious circumferential defect in cylindrical pipeline section 2 and pressure pipeline, onThe defect coefficient Cf that states defect is perhaps very large, but because the suffered stress of fault location is less, therefore theseDefect can not be found in common hydrostatic test, and reason is that the force value of the water pressure test can not arbitrarily be carriedHeight, otherwise likely cause on the pressure pipeline that still can normally use or pressure cylinder cylindrical pipeline section in examinationTest middle appearance and circumferentially break, thereby produce axial flaw. But, in actual use, if depositedAt the bottom of above-mentioned being positioned at bottle of not being detected 1, the major defect of bottle 3 and cylindrical pipeline section 2 circumferentiallyWords (the bottle of especially cylindrical seamless steel cylinder of the circumferential major defect of major defect and pressure pipeline, there is very strict processing technology requirement at the end in thermo forming process, and improper process control is very easily producedRaw annular metal staggered floor crackle), because these defects are serious, Cf is large for defect coefficient, although therefore existIn real work, the suffered stress value of rejected region is less (is less than the circumferential stress σ of cylindrical pipeline section conventionallyC), but development of defects speed is still very fast, within the normal operating period, (is likely therefore forward and backward twiceDuring maintenance pressure test) there is the breaking or cylindrical tube of bottle 3, bottle position, the end 1 of pressure cylinderAxially the breaking or break, or the problem of axially breaking or breaking of pressure pipeline, thereby the safety of causing of sectionAccident.
Visible, there is lower column defects in the water pressure test way of above-mentioned routine: can only find on test specimen cylindricalThe axial major defect that pipeline section exists, and can not find to be present in the circumferentially serious of cylindrical pipeline section on test specimenThe major defect of defect or bottle head, position, bottle bottom, and having of these major defects may cause pressingStrength bottle or pressure pipeline in use meet accident, thereby break or cylinder in generation bottle, a bottle endAxially the breaking or break of shape pipeline section. In addition, except pressure test, although x illumination phase, magnetic are visitedWound, ultrasonic imaging etc. are also to detect the conventional means of defect, but due to the common accuracy of these meansPoor, complicated operation and expense are high, therefore also cannot detect intuitively, exactly to exist on above-mentioned test specimenThe major defect of above-mentioned form.
In addition, for only laying line style deformation amount sensor or explosive-proof jacket at cylindrical pipeline section outer circumference surfaceAs pressure cylinder or the pressure pipeline of explosion-protection equipment, above-mentioned conventional hydraulic test method can causeExplosion-protection equipment cannot detect or weaken except cylindrical pipeline section circumferentially break or break, occur in pressureOther position of gas cylinder or pressure pipeline and multi-form the breaking of other direction, that is to say explosion-proof dressPut and have explosion-proof blind area.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of for cylindrical pressure gas cylinder orPressure pipeline carries out the method for pressure test.
In order to achieve the above object, provided by the inventionly carry out for cylindrical pressure gas cylinder or pressure pipelineThe method of pressure test comprises the following step carrying out in order:
1) on the pressure cylinder as test specimen, on the outer circumference surface of cylindrical pipeline section or pressure pipeline, arrangeRestraint device, and utilize restraint device to apply circumferential pressure to cylindrical pipeline section or pressure pipeline outer circumference surface shouldPower, to reduce circumferential tension;
2) utilize suppress equipment by the annular seal space of water under high pressure injection pressure gas cylinder or pressure pipeline to pressureReach Py, and keep constant voltage a period of time, pressure P y is greater than the pressure adopting without in the constraint water pressure testPower Ph, to check whether test specimen damages or occur extremely, and judges this pressure cylinder according to result of the testOr whether pressure pipeline can continue to use.
Described pressure cylinder be usual pressure gas cylinder or on cylindrical pipeline section outer circumference surface with circumferential spiral shellThe mode of revolving is provided with the combination of line style deformation amount sensor, multiple somes type strain transducers or explosive-proof jacketExplosion-proof type pressure cylinder.
Described pressure pipeline be usual pressure pipeline or on pipeline outer circumference surface with circumferential spiral wayLine style deformation amount sensor, the combination of multiple somes type strain transducers or the explosion-proof type of explosive-proof jacket are installedPressure pipeline.
Described restraint device comprises fixture block and lower fixture block, wherein goes up the bottom surface of fixture block and the top of lower fixture blockOn face, cave inward respectively and be formed with an arcwall face, be arranged on respectively as circle on the pressure cylinder of test specimenOn the upper and lower outer circumference surface of cylindricality pipeline section or pressure pipeline, and arcwall face and cylindrical pipeline section orThe outer circumference surface of pressure pipeline fits together.
Cylindrical pipeline section or pressure pipeline on described upper fixture block and the length of lower fixture block and pressure cylinderLength is identical, and position consistency.
Described restraint device comprises hydraulic outer sleeve and inlet; Wherein hydraulic outer sleeve is loop configuration, coverBe contained in the outside of cylindrical pipeline section on the pressure cylinder as test specimen or pressure pipeline, and hydraulic outer sleeveTwo ends are connected on the outer surface of cylindrical pipeline section 2 or pressure pipeline, thus at hydraulic outer sleeve and cylindricalBetween pipeline section or pressure pipeline outer surface, form annular seal space A; Inlet is arranged on hydraulic outer sleeve.
Connecting portion between described hydraulic outer sleeve and cylindrical pipeline section or pressure pipeline outer surface is provided withSealing ring.
The length phase of cylindrical pipeline section or pressure pipeline on the length of described hydraulic outer sleeve and pressure cylinderWith, and position consistency.
Described restraint device is cylindrical pipeline section or pressure on the pressure cylinder being closely wrapped in as test specimenMetal on hydraulic piping outer circumference surface or nonmetal rope.
Cylindrical pipeline section or pressure on arrange length and the pressure cylinder of described metal or nonmetal ropeThe length of pipeline is identical, and position consistency.
Method of carrying out pressure test for pressure cylinder or pressure pipeline provided by the invention is at pressureOn gas cylinder, on the outer circumference surface of cylindrical pipeline section or pressure pipeline, install restraint device additional, execute to cylindrical pipeline sectionAdd hoop pressure stress, to reduce suffered circumferentially the drawing when the water pressure test of cylindrical pipeline section or pressure pipelineStress just can adopt higher hydraulic test pressure like this in the water pressure test, not only can avoid waterPress that test pressure value is too high makes cylindrical pipeline section or the circumferential tension of pressure pipeline is excessive and generation is circumferentially drawnBreakdown wound, but also can detect major defect on the bottle end/bottle that is present in pressure cylinder, withAnd be present in circumferential major defect or the circumferential crack on cylindrical pipeline section or pressure pipeline.
For only on cylindrical pipeline section outer circumference surface, lay the line style deformation amount sensor that is circumferentially wound around orBe set with explosive-proof jacket as the pressure cylinder of explosion-protection equipment or pressure pipeline (because of at other position clothThe difficulty of putting explosion-protection equipment is very large), the hydraulic test pressure adopting due to the inventive method is high, thereforeCan detect except cylindrical pipeline section axial flaw, appear on pressure cylinder or pressure pipeline otherThe various multi-form defect of position and other direction, thus can ensure that these positions or direction can not send outRaw fracture or explosion accident, or the probability having an accident is very low, so just can eliminate above-mentioned explosion-protection equipmentExplosion-proof blind area.
In addition, this restraint device also has simple in structure, the advantage such as cost is low, convenient operation.
Brief description of the drawings
Fig. 1 is a kind of at present conventional cylindrical pressure gas cylinder structural representation while carrying out the water pressure test.
Fig. 2 carries out pressure examination for what the employing embodiment of the present invention 1 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure front view when the method for testing is tested.
Fig. 3 carries out pressure examination for what the employing embodiment of the present invention 1 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure side view when the method for testing is tested.
Fig. 4 carries out pressure examination for what the employing embodiment of the present invention 2 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure front view when the method for testing is tested.
Fig. 5 carries out pressure examination for what the employing embodiment of the present invention 2 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure side view when the method for testing is tested.
Fig. 6 carries out pressure examination for what the employing embodiment of the present invention 3 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure front view when the method for testing is tested.
Fig. 7 carries out pressure examination for what the employing embodiment of the present invention 3 provided for pressure cylinder or pressure pipelinePressure cylinder or pressure pipeline structure side view when the method for testing is tested.
Fig. 8 carries out pressure examination for what the employing embodiment of the present invention 4 provided for pressure cylinder or pressure pipelinePressure cylinder front view when the method for testing is tested.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments to provided by the invention for pressure cylinder or pressure pipelineThe method of carrying out pressure test is elaborated. The parts identical with prior art adopt identical accompanying drawingLabel.
Embodiment 1:
What as shown in Figure 2 and Figure 3, the present embodiment provided carries out pressure for pressure cylinder or pressure pipelineThe restraint device that the method for test adopts comprises fixture block 5 and lower fixture block 6, the end of wherein going up fixture block 5On the end face of face and lower fixture block 6, cave inward respectively and be formed with an arcwall face, be arranged on respectively as examinationOn the pressure cylinder of part on the upper and lower outer circumference surface of cylindrical pipeline section 2 or pressure pipeline, and arcThe outer circumference surface of shape face and cylindrical pipeline section 2 or pressure pipeline fits together.
Cylindrical pipeline section 2 or force pipe on described upper fixture block 5 and the length of lower fixture block 6 and pressure cylinderThe length in road is identical, and position consistency, does not damage test specimen surface to guarantee isostasy.
In addition, for ensure upper fixture block 5 and lower fixture block 6 test specimen is exerted pressure balanced reliable, can be at upper fixture block5 and the contact-making surface of lower fixture block 6 and test specimen on lay rubber, plastics or asbestos cushion pad.
In addition, the gap L between upper fixture block 5 and lower fixture block 6 should be as far as possible little, can be at 0.1-5mmBetween choose, equal as far as possible to guarantee the circumferential stress of cylindrical pipeline section 2 on pressure cylinder or pressure pipelineEven.
In the time carrying out the water pressure test, if test specimen is pressure pipeline, first by its two ends shutoff, thus at itInner form an annular seal space, and a reserved liquid in-out mouth, then by special suppress equipment a(such asHydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline. Afterwards on pressure cylinderOn the outer circumference surface of cylindrical pipeline section 2 or pressure pipeline, above-mentioned restraint device is set, and to restraint deviceBetween upper fixture block 5 and lower fixture block 6, apply clamping force F. Clamping force F can be by hydraulic press, weight orLever provides, and while reducing the water pressure test with this, on pressure cylinder, cylindrical pipeline section 2 or pressure pipeline are heldThe circumferential stress being subject to, the large I of clamping force F is calculated by theory or experimental result is determined, is having to meetIn confining pressure test, can not make on pressure cylinder cylindrical pipeline section 2 or pressure pipeline because of circumferential tension mistakeProduce and circumferentially break or damage as prerequisite greatly. The opportunity that applies of clamping force can be bulge test itBefore, can be also to apply by opportunity or the speed set in the process of the test raising at pressure. In addition,Contact-making surface on fixture block 5 and lower fixture block 6 and pressure cylinder between cylindrical pipeline section 2 or pressure pipeline should be use upMay be smooth, to reduce the impact of clamping force F on test specimen axial deformation and axial stress. Utilize and beat afterwardsBe installed with standby a and inject water under high pressure in the annular seal space of pressure cylinder or pressure pipeline, make annular seal space internal pressure literHigh to hydraulic test pressure Py, Py chooses between 1.1-3.5Ph conventionally, and Ph is conventional at presentThe pressure adopting during without the constraint water pressure test, gets Ph=1.5Pg conventionally, and Pg is pressure cylinder or pressureThe nominal operating pressure of pipeline, and keep constant voltage a period of time, to check whether test specimen damages or occur differentOften, and according to result of the test judge whether this pressure cylinder or pressure pipeline can continue to use. PressurePy should be large as far as possible, even higher than the burst pressure of pressure cylinder (due to the existence of outer wall constraint, explosionReality can not occur), to can find on pressure cylinder defect, the circle at the bottle end 1, bottle 3 comprehensivelyThe circumferential defect of cylindricality pipeline section 2 and the circumferential defect of pressure pipeline, certainly, pressure P y can not mistakeGreatly, otherwise can cause new defect or the crackle of above-mentioned position or above-mentioned form.
Embodiment 2:
What as shown in Figure 4, Figure 5, the present embodiment provided carries out pressure for pressure cylinder or pressure pipelineThe restraint device that the method for test adopts comprises hydraulic outer sleeve 7 and inlet 8; Wherein hydraulic outer sleeve 7For loop configuration, be sleeved on the outside of cylindrical pipeline section 2 on the pressure cylinder as test specimen or pressure pipeline,And the two ends of hydraulic outer sleeve 7 are connected on the outer surface of cylindrical pipeline section 2 or pressure pipeline, exist thusBetween hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outer surface, form annular seal space A; Feed liquorMouth 8 is arranged on hydraulic outer sleeve 7.
Connecting portion between described hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outer surface is establishedThere is sealing ring 9.
The length of cylindrical pipeline section 2 or pressure pipeline on the length of described hydraulic outer sleeve 7 and pressure cylinderIdentical, and position consistency, test specimen surface do not damaged to guarantee isostasy.
In the time carrying out the water pressure test, if test specimen is pressure pipeline, first by its two ends shutoff, thus at itInner form an annular seal space, and a reserved liquid in-out mouth, then by special suppress equipment a(such asHydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline, another is beaten simultaneouslyBe installed with standby b(such as hydraulic dynamometer) be connected with inlet 8. Cylindrical on pressure cylinder afterwardsAbove-mentioned restraint device is set on the outer circumference surface of pipeline section 2 or pressure pipeline, then utilize suppress equipment b toIn annular seal space A between hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outer surface, inject highSetting-out, makes the annular seal space A between hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outer surfaceInternal pressure is increased to Pw, and recycling is suppressed equipment a and injected in the annular seal space of pressure cylinder or pressure pipelineWater under high pressure, makes the annular seal space internal pressure of pressure cylinder or pressure pipeline be increased to hydraulic test pressure Py, andKeep constant voltage a period of time, to check whether test specimen damages or occur extremely, and sentence according to result of the testWhether fixed this pressure cylinder or pressure pipeline can continue to use. Wherein Pw is less than Py, and the effect of Pw isThe circumferential tension of cylindrical pipeline section 2 or pressure pipeline while reducing the water pressure test, its large I is by theory meterCalculation or experimental result are determined, can not made cylindrical tube on pressure cylinder to meet in Constrained pressure testSection 2 or pressure pipeline are circumferentially broken or are damaged as prerequisite because of circumferential excessive generation of tension. Pressure P wThe opportunity that applies can be before bulge test, can be also pressure raise process of the test in by establishingFixed opportunity or speed apply.
Embodiment 3:
What as shown in Figure 6, Figure 7, the present embodiment provided carries out pressure for pressure cylinder or pressure pipelineThe restraint device that the method for test adopts is cylindrical on the pressure cylinder being closely wrapped in as test specimenMetal on pipeline section 2 or pressure pipeline outer circumference surface or nonmetal rope 10.
On arrange length and the pressure cylinder of described metal or nonmetal rope 10 cylindrical pipeline section 2 orThe length of pressure pipeline is identical, and position consistency, does not damage test specimen surface to guarantee isostasy. SeparatelyOutward, metal or nonmetal rope 10 should be smooth as far as possible with the contact-making surface on test specimen surface, to reduce metalOr the impact of nonmetal rope 10 on test specimen axial deformation and axial stress.
In addition, for ensure metal or nonmetal rope 10 test specimen is exerted pressure balanced reliable, can be at metalOr lay rubber, plastics or asbestos cushion pad on the contact-making surface of nonmetal rope 10 and test specimen.
In the time carrying out the water pressure test, if test specimen is pressure pipeline, first by its two ends shutoff, thus at itInner form an annular seal space, and a reserved liquid in-out mouth, then by special suppress equipment a(such asHydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline. Afterwards at pressure cylinderOn the outer circumference surface of upper cylindrical pipeline section 2 or pressure pipeline, above-mentioned metal is set or nonmetal rope 10 is doneFor restraint device, the two ends of metal or nonmetal rope 10 are applied to tightening force F1 simultaneously, its effect isThe circumferential stress of cylindrical pipeline section 2 or pressure pipeline while reducing the water pressure test. Tightening force F1 can be by hydraulic pressureForcing press, weight or lever provide, and its large I is calculated by theory or experimental result is determined, to meetIn Constrained pressure test, can not make on pressure cylinder cylindrical pipeline section 2 or pressure pipeline because of circumferential stress mistakeProduce and circumferentially break or damage as prerequisite greatly. Can be in bulge test the opportunity that applies of tightening force F1Before, can be also to apply by opportunity or the speed set in the process of the test raising at pressure. Hydraulic pressure examinationTest process the same, therefore no longer heavily chat here.
Embodiment 4:
As shown in Figure 8, the pressure cylinder in above-described embodiment 1-3 or pressure pipeline can be at its circleOn cylindricality pipeline section 2 outer circumference surfaces, line style deformation amount sensor 11 is installed as anti-using circumferential spiral wayThe explosion-proof type pressure cylinder of quick-fried device or explosion-proof type pressure pipeline. Can under above-mentioned Prescribed Properties, carry outLine style deformation amount sensor 11 is installed before or after the water pressure test.
Through the above-mentioned water pressure test of carrying out, can check out pressure cylinder or force pipe under constraintsOther position except cylindrical pipeline section axial flaw, road and the various forms of major defects of other direction,Especially the common position, bottle bottom that is present in seamless steel cylinder, by the improper metal lattice causing of hot-workingThe hoop crack misplacing and cause, so in use, the line style deflection of installing in the above described mannerSensor 11 just can be occurring before circumferentially breaking appears in cylindrical pipeline section to send alarm signal, to preventThe generation of explosion accident. And at other position or other be subject to force direction, owing to having passed through very high the having of pressureThe inspection of the water pressure test of constraint, and in use suffered stress is very little, therefore can not occurBursting accident (or the probability of bursting accident generation is very low), so no longer must install explosion-protection equipment.
In addition, be availablely arranged on multiple somes types on cylindrical pipeline section 2 outer surfaces by setting density and modeThe combination of strain transducer (for example foil gauge) or the explosive-proof jacket that is enclosed within cylindrical pipeline section 2 outsides carry out generationFor line style deformation amount sensor 11, wherein explosive-proof jacket is cylindrical metal or nonmetal cover, itself and pressureOn gas cylinder, between the outer circumference surface of cylindrical pipeline section or pressure pipeline, leave gap or gapless.
Claims (10)
1. carry out a method for pressure test for cylindrical pressure gas cylinder or pressure pipeline, its featureBe: described method comprises the following step carrying out in order:
1) on the pressure cylinder as test specimen on the outer circumference surface of cylindrical pipeline section (2) or pressure pipelineRestraint device is set, and utilizes restraint device to execute cylindrical pipeline section (2) or pressure pipeline outer circumference surfaceAdd hoop pressure stress, to reduce circumferential tension;
2) utilize suppress equipment by the annular seal space of water under high pressure injection pressure gas cylinder or pressure pipeline to pressureReach Py, and keep constant voltage a period of time, pressure P y is greater than the pressure adopting without in the constraint water pressure testPower Ph, to check whether test specimen damages or occur extremely, and judges this pressure cylinder according to result of the testOr whether pressure pipeline can continue to use.
2. method according to claim 1, is characterized in that: described pressure cylinder is commonPressure cylinder or with circumferential spiral way, line style distortion is installed on cylindrical pipeline section (2) outer circumference surfaceThe combination of quantity sensor (11), multiple somes type strain transducers or the explosion-proof type pressure cylinder of explosive-proof jacket.
3. method according to claim 1, is characterized in that: described pressure pipeline is commonPressure pipeline or with circumferential spiral way, line style deformation amount sensor is installed on pipeline outer circumference surface(11), the explosion-proof type pressure pipeline of the combination of multiple somes type strain transducers or explosive-proof jacket.
4. method according to claim 1, is characterized in that: described restraint device comprisesFixture block (5) and lower fixture block (6), wherein go up on the bottom surface of fixture block (5) and the end face of lower fixture block (6)Cave inward respectively and be formed with an arcwall face, be arranged on respectively on the pressure cylinder as test specimen cylindricalOn the upper and lower outer circumference surface of pipeline section (2) or pressure pipeline, and arcwall face and cylindrical pipeline section(2) or the outer circumference surface of pressure pipeline fit together.
5. method according to claim 4, is characterized in that: described upper fixture block (5) and underThe length of fixture block (6) is identical with the length of cylindrical pipeline section (2) or pressure pipeline on pressure cylinder, andPosition consistency.
6. method according to claim 1, is characterized in that: described restraint device comprises liquidPress overcoat (7) and inlet (8); Wherein hydraulic outer sleeve (7) is loop configuration, is sleeved on conductThe outside of cylindrical pipeline section (2) or pressure pipeline on the pressure cylinder of test specimen, and hydraulic outer sleeve (7)Two ends be connected on the outer surface of cylindrical pipeline section (2) or pressure pipeline, thus in hydraulic outer sleeve (7)And form annular seal space A between cylindrical pipeline section (2) or pressure pipeline outer surface; Inlet (8)Be arranged on hydraulic outer sleeve (7).
7. method according to claim 6, is characterized in that: described hydraulic outer sleeve (7) andConnecting portion between cylindrical pipeline section (2) or pressure pipeline outer surface is provided with sealing ring (9).
8. method according to claim 6, is characterized in that: described hydraulic outer sleeve (7)Length is identical with the length of cylindrical pipeline section (2) or pressure pipeline on pressure cylinder, and position consistency.
9. method according to claim 1, is characterized in that: described restraint device is for tightBe wrapped in the gold on cylindrical pipeline section (2) on the pressure cylinder as test specimen or pressure pipeline outer circumference surfaceBelong to or nonmetal rope (10).
10. method according to claim 9, is characterized in that: described metal or non-metal ropeThe length of arranging of rope (10) is identical with the length of cylindrical pipeline section (2) or pressure pipeline on pressure cylinder,And position consistency.
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| CN105388070A (en) * | 2015-12-10 | 2016-03-09 | 中国石油天然气股份有限公司 | Sand prevention screen tube hydraulic test apparatus |
| CN107543762A (en) * | 2017-07-10 | 2018-01-05 | 国网浙江省电力公司丽水供电公司 | A kind of fatigue experimental device and method for applying evenly load |
| CN107702995A (en) * | 2017-09-25 | 2018-02-16 | 襄阳五二五泵业有限公司 | A kind of sheath pressure testing device |
| CN108224089B (en) * | 2017-12-08 | 2019-12-27 | 张卫社 | Cylindrical force bearing structure provided with on-off type burst early warning detection cable |
| CN112229724B (en) * | 2020-11-03 | 2023-08-04 | 张卫社 | Detection method for alarm sensitivity of burst early warning detection device |
| CN113655088A (en) * | 2021-09-01 | 2021-11-16 | 信阳富地燃气有限公司 | Anti testing arrangement that fires of gas pipe |
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| DE102006001425B4 (en) * | 2006-01-10 | 2009-10-01 | Benteler Automobiltechnik Gmbh | Rohrprüfanlage |
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| CN202649051U (en) * | 2012-06-28 | 2013-01-02 | 中国十七冶集团有限公司 | Hand-pressing type pipeline pressure test device |
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