CN103994930A - Method for cylindrical pressure air cylinder or pressure pipeline to perform pressure test - Google Patents
Method for cylindrical pressure air cylinder or pressure pipeline to perform pressure test Download PDFInfo
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- CN103994930A CN103994930A CN201410161901.9A CN201410161901A CN103994930A CN 103994930 A CN103994930 A CN 103994930A CN 201410161901 A CN201410161901 A CN 201410161901A CN 103994930 A CN103994930 A CN 103994930A
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Abstract
The invention provides a method for a cylindrical pressure air cylinder or a pressure pipeline to perform a pressure test. The method comprises the following steps that a restriction device is arranged on a cylindrical pipe section on the pressure air cylinder or the outer circumference surface of the pressure pipeline, and in addition, the restriction device is utilized for exerting pressure on the cylindrical pipe section or the outer circumference surface of the pressure pipeline; pressurizing equipment is utilized for filling high-pressure water into a sealed cavity of the pressure air cylinder or the pressure pipeline, in addition, the constant pressure is maintained for a period of time for checking whether a test piece is damaged or whether any abnormity occurs or not, and the like. The method provided by the invention has the advantages that the restriction device is additionally arranged on the cylindrical pipe section on the pressure air cylinder or the outer circumference surface of the pressure pipeline for reducing the circumferential stress received by the cylindrical pipe section or the pressure pipeline during the hydrostatic test, so higher hydrostatic test pressure can be adopted in the hydrostatic test, the circumferential tensile fracture caused by too high pressure value of the hydrostatic test on the cylindrical pipe section or the pressure pipeline can be avoided, and in addition, the circumferential defects existing at the cylindrical pipe section of the pressure air cylinder, the defects existing at the cylinder bottom and the cylinder head or the circumferential defects of the pressure pipeline can also be detected.
Description
Technical field
The invention belongs to cylindrical pressure gas cylinder or pressure pipeline detection technique field, particularly relate to a kind of method of carrying out pressure test for cylindrical pressure gas cylinder or pressure pipeline.
Background technology
The pressure that bears of cylindrical pressure gas cylinder or pressure pipeline is its important technical indicator.In order to guarantee that it can normally work, conventionally in the periodic maintenance inspection work before dispatching from the factory or after dispatching from the factory, all must carry out the hydraulic testing to it.Fig. 1 is a kind of at present conventional cylindrical pressure gas cylinder structural representation while carrying out the hydraulic testing.As shown in Figure 1, this cylindrical pressure gas cylinder mainly by the bottom of bottle 1, cylindrical pipeline section 2 and bottle 3 three part form, and bottle 3 is provided with liquid in-out mouth 4, the length l >1.5D of cylindrical pipeline section 2 wherein, D is the diameter of cylindrical pipeline section 2.Conventional hydraulic testing way is at present: if test specimen is pressure pipeline, first by its two ends shutoff, portion forms an annular seal space within it thus, an and reserved liquid in-out mouth, then by the equipment of the suppressing a(of special use such as hydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline, utilization is afterwards suppressed equipment a and inject water under high pressure in the annular seal space of pressure cylinder or pressure pipeline, make annular seal space internal pressure be increased to hydraulic test pressure Ph and (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 check whether test specimen damages or occur abnormal, and judge according to test findings whether this pressure cylinder or pressure pipeline can continue to use.
If there is birth defect or processing familiar lacunas in the inside of pressure cylinder or pressure pipeline, can with defect coefficient Cf, represent the order of severity of defect, Cf=0 represents zero defect, 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 the pressure pipeline in use defect on it can progressively develop and become large until break or explosion, and the speed Vf of development of defects depends primarily on two parameters: the suffered stress σ of defect coefficient Cf and fault location, i.e. Vf=f (σ, Cf).When pressure pipeline or pressure cylinder are carried out to the hydraulic testing, if internal pressure is certain, the position of stressed maximum be cylindrical pipeline section circumferentially, thereby produce circumferential stress σ c.When the axial flaw of cylindrical pipeline section or the defect coefficient Cf of crackle is excessive and while surpassing certain value, test specimen just can produce and circumferentially breaks or break; But, because the bottle end 1, bottle 3 on pressure cylinder may exist major defect, also likely there is serious circumferential defect in cylindrical pipeline section 2 and pressure pipeline, the defect coefficient Cf of above-mentioned defect is perhaps very large, but the stress suffered due to fault location is less, therefore these defects can not be found in common hydrostatic test, reason is that the force value of the hydraulic testing can not arbitrarily improve, otherwise likely cause cylindrical pipeline section on the pressure pipeline that still can normally use or pressure cylinder to occur circumferentially breaking in test, thereby produce axial flaw.But, in actual use, if have at the bottom of above-mentioned being positioned at bottle of not being detected 1, the major defect of bottle 3 and the words of the circumferential major defect of cylindrical pipeline section 2 and the circumferential major defect of pressure pipeline (the bottle end of especially cylindrical seamless steel cylinder, in thermo forming process, there is very strict processing technology requirement, improper process control very easily produces annular metal staggered floor crackle), because these defects are serious, Cf is large for defect coefficient, although the therefore suffered stress value less (being conventionally less than the circumferential stress σ c of cylindrical pipeline section) of rejected region in real work, but development of defects speed is still very fast, therefore likely within the normal operating period (, during rear twice maintenance pressure test) there is the bottle 3 of pressure cylinder, breaking of position, the end 1 of bottle or axially breaking or breaking of cylindrical pipeline section, or the problem of axially breaking or breaking of pressure pipeline, thereby the security incident of causing.
Visible, there is lower column defects in the hydraulic testing way of above-mentioned routine: can only find the axial major defect that on test specimen, cylindrical pipeline section exists, and can not find to be present in the major defect of the circumferential major defect of cylindrical pipeline section on test specimen or bottle head, position, bottle bottom, and having of these major defects may cause pressure cylinder or pressure pipeline in use to meet accident, thereby produce bottle head, break in the bottle end or axially the breaking or break of cylindrical pipeline section.In addition, except pressure test, although x illumination phase, magnetic powder inspection, ultrasonic imaging etc. are also the conventional means that detects defect, but because the common accuracy of these means is poor, complicated operation and expense are high, therefore also cannot detect intuitively, exactly the major defect of the above-mentioned form existing on above-mentioned test specimen.
In addition, for only laying line style deformation amount sensor or explosive-proof jacket as pressure cylinder or the pressure pipeline of explosion-protection equipment at cylindrical pipeline section outer circumference surface, above-mentioned conventional hydraulic test method can cause explosion-protection equipment cannot detect or weaken except cylindrical pipeline section is circumferentially broken or broken, occur in other position of pressure cylinder or pressure pipeline and multi-form the breaking of other direction, that is to say that explosion-protection equipment exists 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 method of carrying out pressure test for cylindrical pressure gas cylinder or pressure pipeline.
In order to achieve the above object, method of carrying out pressure test for cylindrical pressure gas cylinder or pressure pipeline provided by the invention 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, restraint device is set, and utilizes restraint device to apply hoop pressure stress to cylindrical pipeline section or pressure pipeline outer circumference surface, to reduce circumferential tension;
2) utilize the equipment of suppressing in the annular seal space of water under high pressure injection pressure gas cylinder or pressure pipeline, to reach Py to pressure, and keep constant voltage a period of time, pressure P y is greater than the pressure P h adopting without in the constraint hydraulic testing, to check whether test specimen damages or occur extremely, and judge according to test findings whether this pressure cylinder or pressure pipeline can continue to use.
Described pressure cylinder is usual pressure gas cylinder or with circumferential spiral way, the combination of line style deformation amount sensor, a plurality of somes type strain transducers or the explosion-proof type pressure cylinder of explosive-proof jacket is installed on cylindrical pipeline section outer circumference surface.
Described pressure pipeline is usual pressure pipeline or with circumferential spiral way, the combination of line style deformation amount sensor, a plurality of somes type strain transducers or the explosion-proof type pressure pipeline of explosive-proof jacket is installed on pipeline outer circumference surface.
Described restraint device comprises fixture block and lower fixture block, wherein go up on the bottom surface of fixture block and the end face of lower fixture block and cave inward respectively and be formed with an arcwall face, be arranged on respectively on the upper and lower outer circumference surface of cylindrical pipeline section on the pressure cylinder as test specimen or pressure pipeline, and the outer circumference surface of arcwall face and cylindrical pipeline section or pressure pipeline fits together.
Described upper fixture block is identical with the length of cylindrical pipeline section or pressure pipeline on pressure cylinder with the length of lower fixture block, and position consistency.
Described restraint device comprises hydraulic outer sleeve and inlet; Wherein hydraulic outer sleeve is loop configuration, be sleeved on the outside of cylindrical pipeline section on the pressure cylinder as test specimen or pressure pipeline, and the two ends of hydraulic outer sleeve are connected on the outside surface of cylindrical pipeline section 2 or pressure pipeline, between hydraulic outer sleeve and cylindrical pipeline section or pressure pipeline outside surface, form annular seal space A thus; Inlet is arranged on hydraulic outer sleeve.
Connecting portion between described hydraulic outer sleeve and cylindrical pipeline section or pressure pipeline outside surface is provided with O-ring seal.
The length of described hydraulic outer sleeve is identical with the length of cylindrical pipeline section or pressure pipeline on pressure cylinder, and position consistency.
Described restraint device is for being closely wrapped in metal or the nonmetal rope on cylindrical pipeline section on the pressure cylinder as test specimen or pressure pipeline outer circumference surface.
The length of arranging of described metal or nonmetal rope is identical with the length of cylindrical pipeline section or pressure pipeline on pressure cylinder, and position consistency.
Method of carrying out pressure test for pressure cylinder or pressure pipeline provided by the invention is to install restraint device additional on the outer circumference surface of cylindrical pipeline section or pressure pipeline on pressure cylinder, to cylindrical pipeline section, apply hoop pressure stress, to reduce cylindrical pipeline section or pressure pipeline suffered circumferential tension when the hydraulic testing, in the hydraulic testing, just can adopt higher hydraulic test pressure like this, not only can avoid hydraulic test pressure value too high make cylindrical pipeline section or the circumferential tension of pressure pipeline excessive and produce and circumferentially to break damage, but also can detect the major defect on the bottle end/bottle head that is present in pressure cylinder, and be present in circumferential major defect or the circumferential crack on cylindrical pipeline section or pressure pipeline.
For only laying the line style deformation amount sensor being circumferentially wound around or be set with explosive-proof jacket as pressure cylinder or the pressure pipeline (because arranging that at other position the difficulty of explosion-protection equipment is very large) of explosion-protection equipment on cylindrical pipeline section outer circumference surface, the hydraulic test pressure adopting due to the inventive method is high, therefore can detect except cylindrical pipeline section axial flaw, appear at the various multi-form defect at other position and other direction on pressure cylinder or pressure pipeline, thereby can guarantee that fracture or explosion accident can not occur for these positions or direction, or the probability having an accident is very low, so just can eliminate the explosion-proof blind area of above-mentioned explosion-protection equipment.
In addition, this restraint device also has simple in structure, the advantage such as cost is low, convenient operation.
Accompanying drawing explanation
Fig. 1 is a kind of at present conventional cylindrical pressure gas cylinder structural representation while carrying out the hydraulic testing.
Pressure cylinder or pressure pipeline structure front elevation when Fig. 2 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 1 provides.
Pressure cylinder or pressure pipeline structure side view when Fig. 3 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 1 provides.
Pressure cylinder or pressure pipeline structure front elevation when Fig. 4 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 2 provides.
Pressure cylinder or pressure pipeline structure side view when Fig. 5 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 2 provides.
Pressure cylinder or pressure pipeline structure front elevation when Fig. 6 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 3 provides.
Pressure cylinder or pressure pipeline structure side view when Fig. 7 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 3 provides.
Pressure cylinder front elevation when Fig. 8 tests for the method for carrying out pressure test for pressure cylinder or pressure pipeline that adopts that the embodiment of the present invention 4 provides.
Embodiment
Below in conjunction with the drawings and specific embodiments, method of carrying out pressure test for pressure cylinder or pressure pipeline provided by the invention is elaborated.The parts identical with prior art adopt identical drawing reference numeral.
Embodiment 1:
As shown in Figure 2 and Figure 3, the present embodiment provides carries out for pressure cylinder or pressure pipeline the restraint device that the method for pressure test adopts and comprises upper fixture 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 and cave inward respectively and be formed with an arcwall face, be arranged on respectively on the upper and lower outer circumference surface of cylindrical pipeline section 2 on the pressure cylinder as test specimen or pressure pipeline, and the outer circumference surface of arcwall face and cylindrical pipeline section 2 or pressure pipeline fits together.
Described upper fixture block 5 is identical with the length of cylindrical pipeline section 2 or pressure pipeline on pressure cylinder with the length of lower fixture block 6, and position consistency, does not damage test specimen surface to guarantee equalization of pressure.
In addition, in order to guarantee that upper fixture block 5 and 6 pairs of test specimens of lower fixture block exert pressure balancedly reliable, can on the surface of contact of upper fixture block 5 and lower fixture block 6 and test specimen, 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 between 0.1-5mm, choose, even as far as possible to guarantee the circumferential stress of cylindrical pipeline section 2 on pressure cylinder or pressure pipeline.
When carrying out the hydraulic testing, if test specimen is pressure pipeline, first by its two ends shutoff, portion forms an annular seal space within it thus, and a reserved liquid in-out mouth, then special use is suppressed to equipment a(such as hydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline.On pressure cylinder, on the outer circumference surface of cylindrical pipeline section 2 or pressure pipeline, above-mentioned restraint device is set afterwards, and to applying clamping force F between the upper fixture block 5 of restraint device and lower fixture block 6.Clamping force F can be provided by hydraulic press, weight or lever, cylindrical pipeline section 2 or circumferential stress that pressure pipeline was born on pressure cylinder while reducing the hydraulic testing with this, the large I of clamping force F is calculated by theory or experimental result is determined, take to meet in Constrained pressure test, not make on pressure cylinder cylindrical pipeline section 2 or pressure pipeline circumferentially break or damage as prerequisite because of circumferential excessive generation of tension.Can be the opportunity that applies of clamping force before bulge test, can be also by opportunity or the speed set, to apply in the process of the test raising at pressure.In addition, the surface of contact on upper fixture block 5 and lower fixture block 6 and pressure cylinder between cylindrical pipeline section 2 or pressure pipeline should be smooth as far as possible, to reduce the impact of clamping force F on test specimen axial deformation and axial stress.Utilization is afterwards suppressed equipment a and inject water under high pressure in the annular seal space of pressure cylinder or pressure pipeline, make annular seal space internal pressure be increased to hydraulic test pressure Py, conventionally Py chooses between 1.1-3.5Ph, Ph is the current conventional pressure adopting during without the constraint hydraulic testing, 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 check whether test specimen damages or occur extremely, and judge according to test findings whether this pressure cylinder or pressure pipeline can continue to use.Pressure P y should be large as far as possible, even higher than the burst pressure of pressure cylinder (due to the existence of outer wall constraint, explosion reality can not occur), to can find on pressure cylinder defect, the circumferential defect of cylindrical pipeline section 2 and the circumferential defect of pressure pipeline at the bottle end 1, bottle 3 comprehensively, certainly, pressure P y can not be excessive, otherwise can cause new defect or the crackle of above-mentioned position or above-mentioned form.
Embodiment 2:
As shown in Figure 4, Figure 5, the present embodiment provides carries out for pressure cylinder or pressure pipeline the restraint device that the method for pressure test adopts and comprises hydraulic outer sleeve 7 and inlet 8; Wherein hydraulic outer sleeve 7 is 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 outside surface of cylindrical pipeline section 2 or pressure pipeline, between hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outside surface, form annular seal space A thus; Inlet 8 is arranged on hydraulic outer sleeve 7.
Connecting portion between described hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outside surface is provided with O-ring seal 9.
The length of described hydraulic outer sleeve 7 is identical with the length of cylindrical pipeline section 2 or pressure pipeline on pressure cylinder, and position consistency, does not damage test specimen surface to guarantee equalization of pressure.
When carrying out the hydraulic testing, if test specimen is pressure pipeline, first by its two ends shutoff, portion forms an annular seal space within it thus, an and reserved liquid in-out mouth, then special use is suppressed to equipment a(such as hydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline, another is suppressed to equipment b(such as hydraulic dynamometer simultaneously) be connected with inlet 8.On pressure cylinder, on the outer circumference surface of cylindrical pipeline section 2 or pressure pipeline, above-mentioned restraint device is set afterwards, then utilize and suppress equipment b inject water under high pressure in the annular seal space A between hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outside surface, make the annular seal space A internal pressure between hydraulic outer sleeve 7 and cylindrical pipeline section 2 or pressure pipeline outside surface be increased to Pw, recycling is suppressed equipment a and inject water under high pressure in the annular seal space of pressure cylinder or pressure pipeline, make the annular seal space internal pressure of pressure cylinder or pressure pipeline be increased to hydraulic test pressure Py, and keep constant voltage a period of time, to check whether test specimen damages or occur abnormal, and judge according to test findings whether this pressure cylinder or pressure pipeline can continue to use.Wherein Pw is less than Py, the circumferential tension of cylindrical pipeline section 2 or pressure pipeline when the effect of Pw is the minimizing hydraulic testing, its large I is calculated by theory or experimental result is determined, take to meet in Constrained pressure test, not make on pressure cylinder cylindrical pipeline section 2 or pressure pipeline circumferentially break or damage as prerequisite because of circumferential excessive generation of tension.Can be the opportunity that applies of pressure P w before bulge test, can be also by opportunity or the speed set, to apply in the process of the test raising at pressure.
Embodiment 3:
What as shown in Figure 6, Figure 7, the present embodiment provided carries out restraint device that the method for pressure test adopts for being closely wrapped in metal or the nonmetal rope 10 on cylindrical pipeline section 2 on the pressure cylinder as test specimen or pressure pipeline outer circumference surface for pressure cylinder or pressure pipeline.
The length of arranging of described metal or nonmetal rope 10 is identical with the length of cylindrical pipeline section 2 or pressure pipeline on pressure cylinder, and position consistency, does not damage test specimen surface to guarantee equalization of pressure.In addition, metal or nonmetal rope 10 should be smooth as far as possible with the surface of contact on test specimen surface, to reduce metal or the impact of nonmetal rope 10 on test specimen axial deformation and axial stress.
In addition, in order to guarantee that 10 pairs of test specimens of metal or nonmetal rope exert pressure balancedly reliable, can on the surface of contact of metal or nonmetal rope 10 and test specimen, lay rubber, plastics or asbestos cushion pad.
When carrying out the hydraulic testing, if test specimen is pressure pipeline, first by its two ends shutoff, portion forms an annular seal space within it thus, and a reserved liquid in-out mouth, then special use is suppressed to equipment a(such as hydraulic dynamometer) be connected with the liquid in-out mouth on pressure cylinder or pressure pipeline.Above-mentioned metal or nonmetal rope 10 are set afterwards on pressure cylinder as restraint device on the outer circumference surface of cylindrical pipeline section 2 or pressure pipeline, the two ends of metal or nonmetal rope 10 are applied to tightening force F1, the circumferential stress of cylindrical pipeline section 2 or pressure pipeline when its effect is the minimizing hydraulic testing simultaneously.Tightening force F1 can be provided by hydraulic press, weight or lever, its large I is calculated by theory or experimental result is determined, take to meet in Constrained pressure test, not make on pressure cylinder cylindrical pipeline section 2 or pressure pipeline produce and circumferentially break or damage as prerequisite because circumferential stress is excessive.Can be the opportunity that applies of tightening force F1 before bulge test, can be also by opportunity or the speed set, to apply in the process of the test raising at pressure.Hydraulic testing process is the same, therefore no longer heavily chats here.
Embodiment 4:
As shown in Figure 8, the pressure cylinder in above-described embodiment 1-3 or pressure pipeline can be on its cylindrical pipeline section 2 outer circumference surfaces, to using circumferential spiral way line style deformation amount sensor 11 to be installed as explosion-proof type pressure cylinder or the explosion-proof type pressure pipeline of explosion-protection equipment.Before or after the hydraulic testing that can carry out, line style deformation amount sensor 11 is installed under above-mentioned Prescribed Properties.
Through the above-mentioned hydraulic testing of carrying out under constraint condition, can check out pressure cylinder or pressure pipeline other position except cylindrical pipeline section axial flaw and the various forms of major defects of other direction, the hoop crack especially common position, bottle bottom that is present in seamless steel cylinder, that caused by the improper metal lattice dislocation causing of hot-working, so in use, the line style deformation amount sensor 11 of installing in the above described manner just can be occurring before circumferentially breaking appears in cylindrical pipeline section to send alerting signal, to prevent the generation of explosion accident.And at other position or other be subject to force direction, owing to having passed through the check of the constrained hydraulic testing that pressure is very high, and in use suffered stress is very little, therefore can there is not bursting accident (or the probability that occurs of bursting accident is very low), so no longer explosion-protection equipment must be installed.
In addition, availablely for example, by setting the explosive-proof jacket that density and mode be arranged on the combination of a plurality of somes type strain transducers (foil gauge) on cylindrical pipeline section 2 outside surfaces or be enclosed within cylindrical pipeline section 2 outsides, replace line style deformation amount sensor 11, wherein explosive-proof jacket is cylindrical metal or nonmetal cover, on itself and pressure cylinder, between the outer circumference surface of cylindrical pipeline section or pressure pipeline, leaves gap or gapless.
Claims (10)
1. for cylindrical pressure gas cylinder or pressure pipeline, carry out a method for pressure test, it is characterized in that: 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 pipeline, restraint device is set, and utilizes restraint device to apply hoop pressure stress to cylindrical pipeline section (2) or pressure pipeline outer circumference surface, to reduce circumferential tension;
2) utilize the equipment of suppressing in the annular seal space of water under high pressure injection pressure gas cylinder or pressure pipeline, to reach Py to pressure, and keep constant voltage a period of time, pressure P y is greater than the pressure P h adopting without in the constraint hydraulic testing, to check whether test specimen damages or occur extremely, and judge according to test findings whether this pressure cylinder or pressure pipeline can continue to use.
2. method according to claim 1, is characterized in that: described pressure cylinder is usual pressure gas cylinder or with circumferential spiral way, the combination of line style deformation amount sensor (11), a plurality of somes type strain transducers or the explosion-proof type pressure cylinder of explosive-proof jacket is installed on cylindrical pipeline section (2) outer circumference surface.
3. method according to claim 1, is characterized in that: described pressure pipeline is usual pressure pipeline or with circumferential spiral way, the combination of line style deformation amount sensor (11), a plurality of somes type strain transducers or the explosion-proof type pressure pipeline of explosive-proof jacket is installed on pipeline outer circumference surface.
4. method according to claim 1, it is characterized in that: described restraint device comprises fixture 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) and cave inward respectively and be formed with an arcwall face, be arranged on respectively on the upper and lower outer circumference surface of cylindrical pipeline section (2) on the pressure cylinder as test specimen or pressure pipeline, and the outer circumference surface of arcwall face and cylindrical pipeline section (2) or pressure pipeline fits together.
5. method according to claim 4, is characterized in that: described upper fixture block (5) is identical with the length of cylindrical pipeline section (2) or pressure pipeline on pressure cylinder with the length of lower fixture block (6), and position consistency.
6. method according to claim 1, is characterized in that: described restraint device comprises hydraulic outer sleeve (7) and inlet (8); Wherein hydraulic outer sleeve (7) is 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 outside surface of cylindrical pipeline section (2) or pressure pipeline, between hydraulic outer sleeve (7) and cylindrical pipeline section (2) or pressure pipeline outside surface, form annular seal space A thus; Inlet (8) is arranged on hydraulic outer sleeve (7).
7. method according to claim 6, is characterized in that: the connecting portion between described hydraulic outer sleeve (7) and cylindrical pipeline section (2) or pressure pipeline outside surface is provided with O-ring seal (9).
8. method according to claim 6, is characterized in that: the length of described hydraulic outer sleeve (7) 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 being closely wrapped in metal or the nonmetal rope (10) on cylindrical pipeline section (2) on the pressure cylinder as test specimen or pressure pipeline outer circumference surface.
10. method according to claim 9, is characterized in that: the length of arranging of described metal or nonmetal 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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| CN201410161901.9A CN103994930B (en) | 2014-04-22 | 2014-04-22 | Be used for the method that cylindrical pressure gas cylinder or pressure pipeline carry out pressure test |
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| CN201410161901.9A CN103994930B (en) | 2014-04-22 | 2014-04-22 | Be used for the method that cylindrical pressure gas cylinder or pressure pipeline carry out pressure test |
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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 |
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| 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 |
| CN108224089A (en) * | 2017-12-08 | 2018-06-29 | 张卫社 | The cylindric load-carrying construction of break-make type explosion early warning detection cable is installed |
| CN112229724A (en) * | 2020-11-03 | 2021-01-15 | 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108224089A (en) * | 2017-12-08 | 2018-06-29 | 张卫社 | The cylindric load-carrying construction of break-make type explosion early warning detection cable is installed |
| CN112229724A (en) * | 2020-11-03 | 2021-01-15 | 张卫社 | Detection method for alarm sensitivity of burst early warning detection device |
| 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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| Publication number | Publication date |
|---|---|
| CN103994930B (en) | 2016-05-18 |
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