CN201868014U - Thin-wall gas explosion experiment device with explosion vent - Google Patents
Thin-wall gas explosion experiment device with explosion vent Download PDFInfo
- Publication number
- CN201868014U CN201868014U CN2010206175596U CN201020617559U CN201868014U CN 201868014 U CN201868014 U CN 201868014U CN 2010206175596 U CN2010206175596 U CN 2010206175596U CN 201020617559 U CN201020617559 U CN 201020617559U CN 201868014 U CN201868014 U CN 201868014U
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- China
- Prior art keywords
- venting
- container
- pressure
- thin
- dust explosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 59
- 238000002474 experimental method Methods 0.000 title abstract description 11
- 238000013022 venting Methods 0.000 claims abstract description 34
- 238000013461 design Methods 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 33
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 241000937378 Everettia interior Species 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012932 thermodynamic analysis Methods 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a thin-wall gas explosion experiment device with an explosion vent, which comprises a thin-wall pressure container (1). A gas inlet and outlet (6), a sensor installation hole (3), a vacuum-pressure gauge interface (4) and an ignition hole (5) are arranged on the thin-wall pressure container (1). The thin-wall gas explosion experiment device is characterized in that the explosion vent (2) is arranged at the upper part of the thin-wall pressure container (1) and an explosion venting sheet is installed at the explosion vent (2). On the premise that the safety is ensured, the design wall thickness of the container for explosion can be reduced.
Description
Technical field
The utility model relates to a kind of gas burst experimental provision, and especially a kind of cost is lower, the gas burst experimental provision that has the venting of dust explosion mouth that wall thickness is thin, specifically a kind of thin-walled gas burst experimental provision that has the venting of dust explosion mouth.
Background technology
At present, in chemical industry and the petrochemical production process, inflammable gas adopts closed container or pipeline to store usually or carries.Because the effect of suffering restraints, the gas burst meeting produces higher pressure and pressure climbing speed, to such an extent as to cause casualties and property loss.Combustible (inflammable gas, steam and dust) must evenly mix in certain concentration range with air (or oxygen), form premix gas, meeting ignition source just can blast, this concentration range is called explosion limits, or the explosion ratio limit, it can be used for evaluating inflammable gas and fire dangerous size, can be used as the foundation of fire-proof and explosion-proof Safety Design, for example determine the fire resistance rating of buildings, design house ventilating system etc.
At present, the product of the great majority test flammable gas explosion limit all only is confined to the explosion limits of inflammable gas under the testing standard state, and less for the research of flammable gas explosion limit test technology and device under the off-rating.1996, the spherical blast of AdolfK ü hnerAG design 20L proving installation, adopt the circulation distribution to mix, can test the blast characteristics of inflammable gas (liquid vapors) in the room temperature to 230 ℃, and 1993, the Zhang Jinglin invention has designed inflammable gas (liquid vapors) blast characteristics proving installation, this device can be tested the explosion limits and the minimum ignition energy of inflammable gas (liquid vapors) in the room temperature to 300 ℃, more than involved equipment all under normal pressure, change temperature and test, do not relate to the change of pressure.Therefore need under a kind of off-rating of design (as High Temperature High Pressure, the determinator of flammable gas explosion limit normal temperature high voltage etc.), and because the effect of High Temperature High Pressure, therefore the wall thickness of explosive container must design according to corresponding standard, from security standpoint, the safety coefficient of this type of container is generally had relatively high expectations, the value of its safety coefficient is generally more than 5, this has not only increased manufacture difficulty, increased cost, if run into the generation of special limiting case, even safety coefficient is the highest, the generation of unpredictable explosion accident also can take place, and adopt the venting of dust explosion mouth is means commonly used on present most of venting of dust explosion experimental provision, therefore the venting of dust explosion mouth is combined with the explosion test device, not only can reduce blast and hold the safety coefficient of product, and can reduce the wall thickness of experiment container greatly, reduce manufacturing cost, but according to the knowledge of the applicant, have not yet to see the venting of dust explosion design theory is used for the blast design, the structural design that is about to both combines, and reaches not only safe but also can not appear in the newspapers as yet by economic explosion test device.
Summary of the invention
The purpose of this utility model is at existing nonstandard explosive container because the event of no venting of dust explosion mouth causes its design wall thickness very thick, the excessive manufacturing cost height that causes of safety coefficient, the problem that has potential safety hazard designs a kind of thin-walled gas burst experimental provision that has the venting of dust explosion mouth of letting out waterfall and firing characteristics that combines.
The technical solution of the utility model is:
A kind of thin-walled gas burst experimental provision that has the venting of dust explosion mouth, comprise thin wall overpressure resistant container 1, described thin wall overpressure resistant container 1 is provided with gas inlet-outlet 6, sensor mounting hole 3, vacuum-pressure gauge connection 4 and fire hole 5, it is characterized in that being provided with venting of dust explosion mouth 2, the venting of dust explosion sheet is installed on the venting of dust explosion mouth 2 on the top of thin wall overpressure resistant container 1.
The wall thickness of described thin wall overpressure resistant container 1 is calculated by following formula to be determined:
In the formula, δ is a wall thickness, mm; P is the design pressure of container, MPa;
Be the permissible stress of working temperature lower house material, MPa; D
iBe housing interior diameter, mm;
Be attenuation coefficient; C is an additional wall thickness, comprises three parts: steel plate minus deviation C
1(selecting for use), corrosion allowance C according to the plate specification predetermined data
2(medium there are not the carbon steel and the low alloy steel of obvious corrosive attack, C
2Be not less than 1mm; The rustless steel container atomic to corrosive medium got C
2=0; If calculated wall thickness is during greater than 20mm, then can be unlike considering), processing attenuate amount C
3(choosing voluntarily according to processing technology and working ability) by the manufacturer.
The area A of described venting of dust explosion mouth 2 is calculated by following formula and is determined:
In the formula, V
0Be container volume, m
3C
dBe the coefficient of releasing, get 0.62; p
bBe rupture disk venting of dust explosion pressure, the container work pressure that equals 1.1～1.7 times is the top pressure of gas burst, Pa; R
gBe the gas law constant of releasing, J/ (kgK); T
rBe the absolute temperature of gas of releasing, K; P is the design pressure of container, MPa; K is specific heat ratio k=C
p/ C
v(C
pBe constant pressure specific heat, C
vBe constant volume specific heat); T is the time, s.。
The beneficial effects of the utility model:
The utility model is rational in infrastructure, diverse in function, and security is good, and is with low cost, can not only adapt to the traditional bomb experiment, and can be used for the explosion test under the nonstandard states such as high temperature, high pressure, and security has obtained guarantee.
The utility model can be widely used in the gas burst experiment, is guaranteeing significantly to reduce the cost of experimental provision on the basis of experiment safety.Because the safety coefficient when having increased the venting of dust explosion sheet and can make design is from being reduced to more than 5 between the 1-3, this can reduce the manufacturing cost of airtight container greatly.
The utility model can reduce the design wall thickness of explosive container under the prerequisite that guarantees security.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1.
A kind of thin-walled gas burst experimental provision that has the venting of dust explosion mouth, comprise thin wall overpressure resistant container 1, described thin wall overpressure resistant container 1 is provided with gas inlet-outlet 6, sensor mounting hole 3, vacuum-pressure gauge connection 4 and fire hole 5, be provided with venting of dust explosion mouth 2 on the top of thin wall overpressure resistant container 1, the venting of dust explosion sheet is installed on the venting of dust explosion mouth 2.
Be a thin wall overpressure resistant container wall thickness and the specific design process of letting out the waterfall open area below:
At first calculate the design pressure of the pressure vessel that rupture disk is housed according to the explosion pressure of gas:
A) determine the minimum nominal pressure p of rupture disk
S minAccording to the arch metallic rupture disk of different types, the P of recommendation
S minValue is referring to table 1, wherein p
wWorking pressure (being the top pressure of gas burst) for container;
B) the manufacturing scope of selected rupture disk sees Table 2;
C) design burst pressure (the being venting of dust explosion pressure) p of calculating rupture disk
bp
bEqual p
S minAdd the lower limit (taking absolute value) of selected rupture disk manufacturing scope;
D) the design pressure p p that determines container is not less than p
bAdd the upper limit of selected rupture disk manufacturing scope.
The minimum demarcation burst pressure of table 1 p
S min
| The rupture disk pattern | Load character | p s?min，MPa |
| Common positive arch form | Static load | ≥1.43p w |
| Positive arch form cracks | Static load | ≥1.25p w |
| Positive arch form | Pulsed load | ≥1.7p w |
| Counter-arch shaped | Static load, pulsed load | ≥1.1p w |
Manufacturing scope (the unit: MPa) of table 2 rupture disk
Determine the design wall thickness of spherical container then according to design pressure p:
In the formula, δ is the case design wall thickness, mm; P is the design pressure of container, MPa;
Be the permissible stress of working temperature lower house material, MPa; D
iBe housing interior diameter, mm;
Be attenuation coefficient; C is an additional wall thickness, comprises three parts: steel plate minus deviation C
1(selecting for use), corrosion allowance C according to the plate specification predetermined data
2(medium there are not the carbon steel and the low alloy steel of obvious corrosive attack, C
2Be not less than 1mm; The rustless steel container atomic to corrosive medium got C
2=0; If calculated wall thickness is during greater than 20mm, then can be unlike considering), processing attenuate amount C
3(choosing voluntarily according to processing technology and working ability) by the manufacturer.
Then determine explosion venting area A.By gas dynamics and thermodynamic analysis, can obtain that the gas burst discharge area is in the spherical container
In the formula, V
0Be container volume, m
3C
dBe the coefficient of releasing, get 0.62; p
bBe rupture disk venting of dust explosion pressure, Pa; R
gBe the gas law constant of releasing, J/ (kgK); T
rBe the absolute temperature of gas of releasing, K; P is the design pressure of container, MPa; K is a specific heat ratio, k C
p/ C
v(C
pBe constant pressure specific heat, C
vBe constant volume specific heat); T is the time, s.
Determine the rupture disk material at last.Rupture disk material and maximum operation (service) temperature thereof see Table 3.Because gas burst is moment reaction, rupture disk is subjected to the time of high temperature action and lacks very much (Millisecond), thus select for use the high rupture disk material of Applicable temperature to get final product as far as possible, as chrome-nickel alloy.
The maximum operation (service) temperature of table 3 rupture disk
| The rupture disk material | The highest Applicable temperature/℃ |
| Aluminium | 100 |
| Copper | 200 |
| Nickel | 400 |
| Austenitic stainless steel | 400 |
| Cupronickel (Monel) | 430 |
| Chrome-nickel alloy (inconel) | 480 |
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
The example explanation
Design a 1m
3Spherical hydrogen explosion experimental provision, the experiment original pressure is 0.1MPa, initial temperature is 25 ℃.According to the data maximum explosion pressure p of hydrogen as can be known
m=0.84MPa, specific heat ratio k=C
p/ C
v=14.32/10.19=1.4, gas law constant R
g=4.124kJ/ (kgk).The flame propagation velocity v that hydrogen explodes in air
f=315cm/s, the explosion product temperature is about T
r=1800K, container inner pressure rising multiple ε=p
m/ p
0=0.84/0.1=8.4 (original pressure p
0=0.1MPa).The pressure climbing speed maximal value of hydrogen is
The working pressure p of container
w=p
m=0.84MPa.Because design is the explosive container of experiment usefulness, so the pulsed load that container bears should be selected positive arch form or counter-arch shaped blasting piece according to table 1.Here select counter-arch shaped blasting piece, p
S min〉=1.1p
w, the minimum nominal pressure p of rupture disk then
S minFor
p
s?min≥0.924MPa
According to the manufacturing scope of table 2 selection rupture disk, select 1.0 grades counter-arch shaped blasting piece, can check in and be limited to 0MPa on it, be limited to 0.1p down
bThe design burst pressure p of rupture disk then
bFor
p
b＝1.027MPa
The design pressure p of container is
p≥p
b+0.1p
b＝1.1p
b＝1.1297MPa
In the process of hydrogen explosion experiment, hydrogen may be owing to the change generation detonation of experiment condition, so consider that by secure context the design pressure p of container should be by the detonation pressure p of hydrogen
HReplace.According to data, the detonation pressure p of hydrogen
HBe p=p
H=2.13MPa.
By the spherical volume formula
Can calculate V=1m
3Spherical container, its radius r=0.62m, i.e. interior diameter D
i=1.24m.
Through tabling look-up general carbon steel [σ]
tBe about 130MPa, ignore
C can get wall thickness by formula (1)
δ≥5.1mm
Can get explosion venting area by formula (2)
A＝0.031m
2
If do not install the venting of dust explosion mouth additional, use traditional design method to calculate this 1m
3The wall thickness of spherical container rule of thumb, need be got a safety coefficient n to guarantee the security of container.According to the regulation of " steel boiler pressure vessel (GB150-1998) ", material is that the pressure vessel safety coefficient of carbon steel is generally got n=3.0.Because be at the explosion test Design of device here, but not generally bear the static load pressure vessel, so safety coefficient should be greater than setting herein, n should get 5～8.Get n=8 herein.Then the design pressure of container is
p＝np
H＝17.04MPa
It is thick to get wall of a container by formula (1)
δ≥42.01mm。
Claims (3)
1. thin-walled gas burst experimental provision that has the venting of dust explosion mouth, comprise thin wall overpressure resistant container (1), described thin wall overpressure resistant container (1) is provided with gas inlet-outlet (6), sensor mounting hole (3), vacuum-pressure gauge connection (4) and fire hole (5), it is characterized in that being provided with venting of dust explosion mouth (2) on the top of thin wall overpressure resistant container (1), the venting of dust explosion mouth is equipped with the venting of dust explosion sheet on (2).
2. the thin-walled gas burst experimental provision that has the venting of dust explosion mouth according to claim 1 is characterized in that the wall thickness of described thin wall overpressure resistant container (1) is calculated definite by following formula:
In the formula, δ is a wall thickness, mm; P is the design pressure of container, MPa; [σ]
tBe the permissible stress of working temperature lower house material, MPa; D
iBe housing interior diameter, mm;
Be attenuation coefficient; C is an additional wall thickness, comprises three parts: steel plate minus deviation C
1, corrosion allowance C
2With processing attenuate amount C
3
3. the thin-walled gas burst experimental provision that has the venting of dust explosion mouth according to claim 1 is characterized in that the area A of described venting of dust explosion mouth (2) is calculated definite by following formula:
In the formula, V
0Be container volume, m
3C
dBe the coefficient of releasing, get 0.62; p
bBe rupture disk venting of dust explosion pressure, the container work pressure that equals 1.1～1.7 times is the top pressure of gas burst, Pa; R
gBe the gas law constant of releasing, J/ (kgK); T
rBe the absolute temperature of gas of releasing, K; P is the design pressure of container, MPa; K is a specific heat ratio, k=C
p/ C
v, C
pBe constant pressure specific heat, C
vBe constant volume specific heat; T is the time, s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206175596U CN201868014U (en) | 2010-11-19 | 2010-11-19 | Thin-wall gas explosion experiment device with explosion vent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206175596U CN201868014U (en) | 2010-11-19 | 2010-11-19 | Thin-wall gas explosion experiment device with explosion vent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201868014U true CN201868014U (en) | 2011-06-15 |
Family
ID=44139164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206175596U Expired - Fee Related CN201868014U (en) | 2010-11-19 | 2010-11-19 | Thin-wall gas explosion experiment device with explosion vent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201868014U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608287A (en) * | 2012-03-02 | 2012-07-25 | 北京理工大学 | System and method for testing critical pipe diameter of detonation of combustible gas |
| CN102879428A (en) * | 2012-09-29 | 2013-01-16 | 南京工业大学 | Combustible gas explosion venting harm effect testing device and analytical method |
| CN102879429A (en) * | 2012-10-11 | 2013-01-16 | 南京工业大学 | Testing system for gas explosion characteristic size effect |
| CN102937517A (en) * | 2012-10-29 | 2013-02-20 | 中国石油化工股份有限公司 | Simulation experiment device for estimating safe reliability of safety valve of chemical device |
| CN103456219A (en) * | 2013-09-10 | 2013-12-18 | 中国人民解放军第三军医大学第三附属医院 | Fragment emitting device and method for emitting fragments based on fragment emitting device |
-
2010
- 2010-11-19 CN CN2010206175596U patent/CN201868014U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608287A (en) * | 2012-03-02 | 2012-07-25 | 北京理工大学 | System and method for testing critical pipe diameter of detonation of combustible gas |
| CN102608287B (en) * | 2012-03-02 | 2013-09-04 | 北京理工大学 | System and method for testing critical pipe diameter of detonation of combustible gas |
| CN102879428A (en) * | 2012-09-29 | 2013-01-16 | 南京工业大学 | Combustible gas explosion venting harm effect testing device and analytical method |
| CN102879428B (en) * | 2012-09-29 | 2014-09-10 | 南京工业大学 | Combustible gas explosion venting harm effect testing device and analytical method |
| CN102879429A (en) * | 2012-10-11 | 2013-01-16 | 南京工业大学 | Testing system for gas explosion characteristic size effect |
| CN102879429B (en) * | 2012-10-11 | 2015-03-04 | 南京工业大学 | Testing system for gas explosion characteristic size effect |
| CN102937517A (en) * | 2012-10-29 | 2013-02-20 | 中国石油化工股份有限公司 | Simulation experiment device for estimating safe reliability of safety valve of chemical device |
| CN102937517B (en) * | 2012-10-29 | 2015-07-08 | 中国石油化工股份有限公司 | Simulation experiment device for estimating safe reliability of safety valve of chemical device |
| CN103456219A (en) * | 2013-09-10 | 2013-12-18 | 中国人民解放军第三军医大学第三附属医院 | Fragment emitting device and method for emitting fragments based on fragment emitting device |
| CN103456219B (en) * | 2013-09-10 | 2015-08-19 | 中国人民解放军第三军医大学第三附属医院 | Fragmentation emitter and the method based on this emitter transmitting fragmentation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20111119 |