CN105352809B - A kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device - Google Patents
A kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device Download PDFInfo
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- CN105352809B CN105352809B CN201510816715.9A CN201510816715A CN105352809B CN 105352809 B CN105352809 B CN 105352809B CN 201510816715 A CN201510816715 A CN 201510816715A CN 105352809 B CN105352809 B CN 105352809B
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- shell
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- high pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation devices, including cutter device and height of burst device, the cutter device has overall flexibility, including shell, main charge and cavity liner positioned at enclosure interior, the both sides of the shell are both provided with L-type support plate, the top of the shell is equipped with several boosters, the height of burst device includes support element, fixing bracket and adjusting knob, L-type support plate is connect by adjusting knob with support element, and the extensible member of connection both sides L-type support plate is equipped in the lower section of cavity liner.The high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device of the present invention, the tip crack with metal pipe axis angle in different angles can be formed, be conducive to the flexible Application of testing crew and safe to use, adapt to different high pressure gas transmission metal tube test requirements documents, application prospect is extensive.
Description
Technical field
The present invention relates to a kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation devices, belong to gas liquid
The technology of pressure piping conveying engineering and security fields.
Background technology
In the process of running, because overpressure variation, pipeline material are tired or impaired, and outside is made in high pressure gas pipeline road
With etc. reasons, cause pipeline somewhere generate tube wall crackle so that occur over long distances extend, not only result in serious financial consequences
And environmental pollution, it will also form ground staff's injures and deaths, building and facility and destroy the catastrophic failures such as impaired.Therefore, it is as possible
Reduce loss, accelerate the repairing process after accident occurs, carries out the crack shape of heavy caliber high pressure metallic conduit extensively both at home and abroad
At and extension mechanical behavior research.
In metal tube explosion bulge test, when overpressure reaches set target pressure value, determine that position is drawn in due course in tube wall
Enter crack, make its in pipe drive of high-pressure gas effect under Quick Extended, with verification test crack-stop structure performance.Line style cumulative is cut
High speed high-energy metals jet cutter can be formed after cutting device detonation, is that quick penetration high pressure gas pipeline road forms the effective of incipient crack
Approach.But prior art means are difficult to meet the special cracking initiation requirement of high pressure gas transmission metal tube, such as specific crack shape
Shape (crack width, crack tip angle), different sizes and the pipe characteristic of intensity and the specific direction etc. in crack.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention to provide a kind of high pressure gas transmission metal tube gas
Explosion bulge test tip cracking initiation device is pressed, specific fracture shape may be implemented, adapts to different high pressure gas transmission metal tube examinations
Test requirement.
Technical solution：In order to solve the above technical problems, a kind of high pressure gas transmission metal tube pressure explosion bulge test point of the present invention
It includes shell, the main charge positioned at enclosure interior to hold cracking initiation device, including cutter device and height of burst device, the cutter device
And cavity liner, the shell is identical as shaped charge material, and main charge is pressed into using casting dress powder charge, cutter device one piece
Type, the shell both sides are equipped with L-type support plate, and the top of the shell is equipped with several boosters, and the height of burst device includes
Support element, extensible member and adjusting knob, L-type support plate are connect by adjusting knob with support element, are connected between the L-type support plate of both sides
It is connected to extensible member.
Preferably, the shell and cavity liner include line style main body and " ship " the type end positioned at line style main body both ends
Portion, shell line style main body are the wall-thickness Shells such as cuboid, and hull ships type end is the wall-thickness Shells such as angle type, and cavity liner is lead antimony
Alloy is made, and cavity liner line style main body is that wedge shape becomes wall thickness metal liner, and cavity liner ship type section is that angle type becomes wall thickness metal
Cavity liner.
Preferably, the height of burst of the height of burst deviceUnit mm, wherein V is explosion velocity of explosive, unit m/
S, variation range are 7000~9000m/s；U is cutter device charge depth, and unit mm, variation range is 1.5~15mm；
W is that cavity liner line style main body busbar is long, unit mm, and variation range is 5~60mm, a1, b1, c1It is tri- parameters of V, U, W successively
Index, K1For coefficient, a1=0.3~0.4, b1=0.4~0.6, c1=0.9~1.1, K1=(7.5~8.5) × 10-3.It is right
In the cutter device of specific charge constitution, the best height of burst of name is to determine, needs combining target fracture width most in experiment
The good height of burst nearby determines the practical best height of burst, and is configured by height of burst device adjusting knob, rationally to control energy-gathering jetting
Cutting effect makes metal tubular be unlikely to generate larger local plastic deformation at uniform elongate crackle
Preferably, the fracture widthD is metal tube thickness, unit cm, variation range
For 1~2cm；R is metal tube radius of curvature, and unit mm, variation range is 500mm~700mm, and H is the setting height of burst, unit
Cm, variation range are 0~20cm, a2, b2, c2It is the index of tri- parameters of R, D, H, K successively2For coefficient, with quadrature analysis
Method determines testing program, is handled test data in conjunction with regression analysis, obtains a in above-mentioned formula2、b2、c2、K2Value point
It is not：a2=0.1~0.2, b2=0.3~0.4, c2=0.7~1.0, K2=5~25.
Preferably, the height of burst device is the compound detachable apparatus of disposable metal-plastics, wherein support element, adjusting rotation
Button be thin metalwork, the extensible member be plastic part, height of burst adjustable extent be 0~10cm, height of burst adjustable extent be 0~
10cm, after an explosive test, height of burst device is ability of losing the job.
Preferably, the booster is located at booster room, booster room is plastic cylindrical hollow shell.
Preferably, the cavity liner and shell, which use, has metal flexible, the difference for being suitable for metal tube surface is bent
Rate.
Advantageous effect：The high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device of the present invention has whole
Flexibility can be laid along with the axially distinct angle direction of metal tube, and cutter device cavity liner ship type tip is avoided by end effect
The tack crack tip of formation, it is ensured that the incipient crack tip of formation is wedge shape, for specific cumulative blasting device, in conjunction with it
Cutting power and metal tube material and structural parameters determine the practical best height of burst, so that cutter device is formed by adjusting height of burst device
The incipient crack of specific width and tip angle is conducive to the flexible Application of testing crew and safe to use, and application prospect is extensive.
Description of the drawings
Fig. 1 is the section view of the present invention；
Fig. 2 is cutter device constituent element side view of the present invention；
Fig. 3 is the structural schematic diagram of Traditional-Chinese-medicine-type cover of the present invention；
Fig. 4 is the structural schematic diagram of middle casing of the present invention.
Specific implementation mode
Embodiment 1：
As shown in Figures 1 to 4, which is directed to length 10.5m, the X70 high pressures of bore 1.016m, thickness 1.46cm
Gas transmission metal tube pressure explosion bulge test designs, including cutter device and height of burst device two parts constituent element, and cutter device includes cavity liner
4, main charge 3, booster 1 and shell 2, height of burst device include support element 5, adjusting knob 6,7 three parts of extensible member, axial length
30cm.Cavity liner 4 is connected with shell 2, by a line style main part (line style main body) and two " ship " type ends (ship type section)
It constitutes, lead-antimony alloy is selected to be made.Cavity liner line style main body 10 is that wedge shape becomes wall thickness metal liner, cavity liner ship type section 11
Become wall thickness metal liner, 10 bottom mouth width 22.5mm of cavity liner line style main body, 110 ° of opening angle, line style main body for angle type
Bus length 15mm, 11 length 18mm of ship type section, 64 ° of opening angle, 11 top thickness 0.8mm of line style main body 10 and ship type section,
Bottom thickness 1.6mm.Line style main body shell line style main body 8 is the wall-thickness Shells such as rectangle, and hull ships type end 9 is angle type etc.
Wall-thickness Shell, 2 wall thickness 1.6mm of shell are used as main charge 3, explosion velocity 8835m/s, 3 height of main charge using casting dress powder charge 8701
1cm, using tetryl as booster 1.Height of burst device and cutter device are assembled when use, L-type support plate is used in combination to fill cutting
It sets and is fixed on upper edge central segment on the outside of tube wall, wired electric initiating is carried out using 8# electric caps.
Before the test, it would be desirable to which it is symmetrical to form both ends, tip wedgewise, length 30cm, and parallel-segment width is 3mm's
Initial crack.Using preparation method scheme at random, and coefficient k is determined using regression analysis to test data1With index a1, b1,
W1Respectively 8.23 × 10-3, 0.35,0.57,1.05, coefficient k2With index a2,b2,W2Respectively 9.5,0.17,0.32,0.74.
According to formulaIt is 12.65mm that the best height of burst of its name, which can be obtained, considers that the simplification of practical operation, selection are practical
The best height of burst is 13mm, by formulaCalculate theoretical crackle parallel-segment width be 3.63mm, meet examination
Test requirement.
Implementation result：Refering to fig. 1 with Fig. 2,2 simultaneous initiations, fire point setting are used to exist in line style cumulative blasting device
At the wealthy booster room in cutter device constituent element both ends 1, by our setting, after cutter device detonation, the instantaneous shape of metal tube surface
At incipient crack, under the thump effect of high pressure gas load, crack extends rapidly in an axial direction, and metal tube is acutely torn,
The long 31.5cm in incipient crack, both ends wedgewise, crack interlude form circle and turn over lip.
Embodiment 2：
As depicted in figs. 1 and 2, which is directed to length 31.7m, the X90 high pressures of bore 1.219m, thickness 1.63cm
Gas transmission metal tube pressure explosion bulge test designs, including cutter device and height of burst device two parts constituent element.Cutter device constituent element includes medicine
Type cover 4, main charge 3, booster 1 and shell 2, axial length 50cm.Height of burst device includes support element 5, adjusting knob 6, extensible member 7
Three parts.Cavity liner 4 is connected with shell 2, by a line style main part (line style section) and two " ship " type ends (ship type section)
It constitutes, lead-antimony alloy is selected to be made.Cavity liner line style main body 10 is that wedge shape becomes wall thickness metal liner, and ship type section 11 is angle
Type becomes wall thickness metal liner, 10 bottom mouth width 27mm of cavity liner line style main body, 110 ° of opening angle, the length of line style main body busbar 12
Spend 19mm, 11 length 21mm of ship type section, 65.5 ° of opening angle, 11 top thickness 1mm of line style main body 10 and ship type section, bottom thickness
Spend 2mm.Line style main body shell line style main body 8 is the wall-thickness Shells such as rectangle, and ship type section 9 is the wall-thickness Shells such as angle type, shell 2
Wall thickness 2mm is used as main charge 3,3 height 1.9cm of main charge, using tetryl as booster 1 using casting dress powder charge 8701.Make
Used time assembles height of burst device and cutter device, is used in combination fixing device that cutter device is fixed on upper edge central segment on the outside of tube wall, adopts
Wireless electric initiating is carried out with 8# electric caps.
Before the test, it would be desirable to form that both ends are symmetrical, and tip wedgewise, length 50cm, parallel-segment width 4mm's is initial
Crackle determines coefficient k using orthogonal experiment, and to test data using regression analysis1With index a1, b1,W1Respectively
8.5×10-3, 0.37,0.48,0.9, coefficient k2With index a2,b2,W2Respectively 20.3,0.15,0.35,0.85.According to formulaIt is 14.31mm that its best height of burst, which can be obtained, considers the simplification of practical operation, selects suitable for the height of burst to be 15mm,
By formulaCalculate theoretical crackle parallel-segment width be 4.48mm, Pass Test requirement.
Implementation result：Refering to fig. 1, point initiation in being used to line style cumulative blasting device, detonation mode setting are filled in cutting
It sets at middle part booster room 1, after cutter device detonation, metal tube surface simultaneously forms incipient crack, in high pressure gas load
Under thump effect, crack extends rapidly in an axial direction, and metal tube is acutely torn, the long 50.7cm in incipient crack, both ends wedgewise.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device, it is characterised in that：Including cutter device
With height of burst device, the cutter device includes shell, main charge and cavity liner positioned at enclosure interior, the shell and cavity liner material
Expect it is identical, main charge using casting dress powder charge, cutter device one piece compression moulding, the shell both sides be equipped with L-type support
The top of plate, the shell is equipped with several boosters, and the height of burst device includes support element, extensible member and adjusting knob, L-type branch
Fagging is connect by adjusting knob with support element, and extensible member is connected between the L-type support plate of both sides；The shell and cavity liner are equal
Including line style main body and " ship " the type end positioned at line style main body both ends, shell line style main body is the wall-thickness Shells such as cuboid, shell
Body ship type end is that wall-thickness Shells, the cavity liners such as angle type are made of lead-antimony alloy, and cavity liner line style main body is that wedge shape becomes wall thickness
Metal liner, cavity liner ship type end are that angle type becomes wall thickness metal liner；The best height of burst of name of the cutter deviceUnit mm, wherein V is explosion velocity of explosive, and unit m/s, variation range is 7000~9000m/s；U is to cut
Device charge depth, unit mm are cut, variation range is 1.5~15mm；W is that cavity liner line style main body busbar is long, unit mm,
Variation range is 5~60mm, a1, b1, c1It is the index of tri- parameters of V, U, W, K successively1For coefficient, a1=0.3~0.4, b1=
0.4~0.6, c1=0.9~1.1, K1=(7.5~8.5) × 10-3；The fracture widthD is metal
Tube thickness, unit cm, variation range are 1~2cm；R be metal tube radius of curvature, unit mm, variation range be 500mm~
700mm, H are the setting height of burst, and unit cm, variation range is 0~20cm, a2, b2, c2It is the finger of tri- parameters of R, D, H successively
Number, K2For coefficient, a in formula2、b2、c2、K2Value be respectively：a2=0.15~0.2, b2=0.3~0.4, c2=0.7~1.0,
K2=5~25.
2. high pressure gas transmission metal tube pressure explosion bulge test according to claim 1 tip cracking initiation device, feature exist
In：The height of burst device is the compound detachable apparatus of disposable metal-plastics, and wherein support element, adjusting knob are thin metalwork, institute
It is plastic part to state extensible member, and height of burst adjustable extent is 0~10cm.
3. high pressure gas transmission metal tube pressure explosion bulge test according to claim 2 tip cracking initiation device, feature exist
In：The booster is located at booster room, and booster room is plastic cylindrical hollow shell.
4. high pressure gas transmission metal tube pressure explosion bulge test according to claim 3 tip cracking initiation device, feature exist
In：The cavity liner and shell, which use, has metal flexible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510816715.9A CN105352809B (en) | 2015-11-23 | 2015-11-23 | A kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device |
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| CN201510816715.9A CN105352809B (en) | 2015-11-23 | 2015-11-23 | A kind of high pressure gas transmission metal tube pressure explosion bulge test tip cracking initiation device |
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| CN105352809B true CN105352809B (en) | 2018-10-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375325B (en) * | 2017-12-05 | 2023-10-31 | 物华能源科技有限公司 | Linear energy-gathering cutting device for pipeline |
| CN112238177A (en) * | 2020-10-16 | 2021-01-19 | 安徽理工大学 | Energy-gathered cutting device with variable explosion height |
| CN112924269A (en) * | 2021-01-11 | 2021-06-08 | 国家管网集团西部管道有限责任公司 | Method and test device for simulating third-party damage to large-caliber high-pressure pipeline |
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