CN203630126U - Device for testing acting pressure of explosion contact surface of explosive - Google Patents
Device for testing acting pressure of explosion contact surface of explosive Download PDFInfo
- Publication number
- CN203630126U CN203630126U CN201320774089.8U CN201320774089U CN203630126U CN 203630126 U CN203630126 U CN 203630126U CN 201320774089 U CN201320774089 U CN 201320774089U CN 203630126 U CN203630126 U CN 203630126U
- Authority
- CN
- China
- Prior art keywords
- explosive
- pressure
- container
- throwing
- rigid body
- 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
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a device for testing an acting pressure of an explosion contact surface of explosive. With the adoption of the method, the difficulty in testing the explosion pressure of the explosive under a high temperature and a high pressure (dozens of gigapascals) is solved; the pressure of the explosion contact surface comprises the change of pressure acting on the contact surface in the detonation growth and attenuation processes of the explosive. In order to measure the pressure of the explosion contact surface of the explosive, the design provided by the utility model comprises following parts: an explosion container, a casting columnar rigid body, a high-speed camera, a vacuum pump, a safety valve, a container of the casting columnar rigid body, a detonation device and a ruler.
Description
Technical field
The utility model relates to a kind of device design of testing explosive charge surface of contact applied pressure, especially present stage High Temperature High Pressure directly test more difficult in the situation that, realize the test of high pressure.
Background technology
At present, although the method for test pressure is a lot, but there is no people for explosive charge and the direct method of testing that contacts object pressure proposes, explosive charge process high-speed and high-temperature high pressure, as PETN can reach 30～50GPa with RDX single chmical compound explosive according to the different detonation pressure of explosive density, quick-fried temperature can reach 4000K.The conventional explosive detonation pressure of industry is generally less than above single chmical compound explosive, but also reaches the order of magnitude of tens lucky handkerchiefs, and high density high-power military explosive detonation pressure is generally higher.Under the condition of such High Temperature High Pressure, still do not have a kind of sensor satisfying condition can directly measure detonation pressure at present.And explosive charge and density be greater than explosive object contact produce applied pressure be greater than detonation pressure.Present stage researcher is by testing shock wave pressure at explosive charge different distance place, estimate detonation pressure by the aerial attenuation law of shock wave again, but because detonation process complexity and detonation High energy density materials characterisitic parameter not necessarily meet the attenuation law of shock wave in air, and the aerial attenuation law of shock wave itself is not too perfect, there is certain error so estimate the method for detonation pressure, thereby further utilize detonation pressure, two times of law calculating detonation similar with acoustics pressure also can have certain error.Propose compared with multi-method for the detonation pressure testing research person of explosive at present, except method mentioned above, also comprised free surface velocity method, adopting water tank method, electromagnetic method and manganin piezoresistive method, but all do not provide a kind of method of Measurement accuracy detonation pressure.
201110116907.0 provided a kind of method of high energy implosion explosive detonation characteristic test, the method is to be provided with pressure transducer on the wall of the explosive container of a password protection, the actual pressure recording is the pressure after detonation product diffusion, this can be used as a foundation of assessment explosive property, but does not measure explosion-induced loads pressure.
201210400836.1 provided a kind of High Temperature High Pressure explosion limits tester, measure method and the application of explosion limits, this utility model is only limited to 400 ℃ of the Exploding test of test gas and maximum temperatures, and the highest 2.2MPa of pressure does not clearly reach the condition of test explosive charge.
201210369067.3 provide a kind of multi-functional thin water smoke suppresses flammable gas explosion test macro and method of testing, also relates to a kind of pressure test, but does not realize the test condition of explosive charge.
Gu Pingan, Wei Haiying and the Xiao Changyan of Xibei Nuclear Techn Inst, to the research of FAE Cloud Detonation shock wave pressure measuring technology, a kind of pressure that utilizes sensor test a distance Detonation Shock Wave has also been proposed, but be also the performance that is limited to sensor, there is no to propose directly to test the method for the applied pressure on explosive charge surface of contact.
The people such as Zhao Jibo, Tan Duowang, Li Jinhe in Fluid Physics Inst., China Engineering Physics Academy's shock wave physics and detonation physics laboratory carried out research to cylindricality powder charge water shooting near field radial pressure, proposition utilizes high-velocity scanning cameras record shock velocity method and Rankine-Hugoniot relation to calculate the method for near field shock wave pressure, but the method is the test of near field shock wave.
Utility model content
In order to reach the object of test explosive charge surface of contact applied pressure, the utility model provides a kind of new proving installation.The method can realize the object of testing high voltage under high temperature (tens lucky handkerchiefs), can also test out the applied pressure that explosive reaches the whole process contact face of detonation by unreacted and change.The realization of the method, provides foundation to research explosive detonation mechanism and assessment explosive property, can be used as a kind of important indicator of assessment explosive property, for research explosive property provides experimental basis.
The utility model solves the technical scheme that its technical matters adopts: utilize the law of conservation of momentum, design a throwing cylindricality rigid body that the quality contacting with explosive is adjustable, utilize data acquisition system (DAS) to collect the motion conditions of explosive charge process throwing cylinder, utilize the data analysis system deal with data of design, last explosive charge process contact face applied pressure and the relation of time of drawing, blast surface of contact applied pressure and time relationship.
Utilize the ultimate principle of momentum conservation test:
Ft＝mv＝I （1）
∫(P(t)S-mg)dt＝Δ(mv)＝mv （2）
In formula (2): P (t) for the t moment surface of contact applied pressure that explodes, S be the contact area of experiment powder column and throwing cylindricality rigid body, mg is the gravity of throwing cylindricality rigid body, v is the speed of throwing cylindricality rigid body.
To (2) formula, conversion draws
mv'
t+mg＝P(t)S （3）
In formula: v'
tfor acceleration, data available acquisition system and data analysis system obtain.
V'
tmethod for solving: utilize high-speed camera instrument to collect below height H and the data of time T of the throwing cylindricality rigid body of design, recycle data analysis system and can simulate the relation of H and T, relation equation is as follows
H＝A
1+A
2T+A
3T
2+A
4T
3+…+A
N+1T
N （4）
A in formula
1, A
2, A
3, A
4a
n+1deng being undetermined coefficient, to (4) formula secondary, differentiate can draw v'
t.
According to (3) formula, determining that certain acceleration in the situation that in moment, be easy to calculate pressure corresponding to this moment, reach detonation pressure so can obtain from throwing cylindricality rigid body setting in motion to explosion pressure, then arrive the blast surface of contact applied pressure of the whole process of explosive detonation decline of pressure.Can determine maximum detonation pressure and the growth of detonation part and attenuation process detonation pressure so utilize above principle.
Comprise following part in order to realize above process the utility model design: container, apparatus to cause bursting and the scale of explosive container, throwing cylindricality rigid body, high-speed camera instrument, vacuum pump, safety valve, throwing cylindricality rigid body.
Explosive container select the trade mark be the casting pig of HT350 as explosive container material, HT350 type casting pig tensile strength is 350GPa, elastic modulus is 130～160MPa, compressive strength is 1100～1300MPa, shearing strength is 350～500MPa.Strength condition (opening cylinder) the 3rd strength theory while being subject to interior pressure by thicl-walled cylinder and the explosion-induced loads pressure peak overpressure checking computations design explosive container size on container, can obtain explosive loading diameter is 38mm, design external diameter 350mm, the explosive container of internal diameter 120mm can meet the requirement that once detonation dose is 0.10kgTNT equivalent, explosive loading diameter is 38mm, and the pressure of 0.10kgTNT equivalent explosion-induced loads on wall is 342.3MPa.Explosive container final size scope is external diameter 350～450mm, internal diameter 120～150mm, and height is 400mm.In explosive container, a kind of support of design is used for installing explosive.
Throwing cylindricality rigid body adopts and selects the trade mark is the casting pig of HT350, and throwing cylindricality rigid body is the adjustable structure of quality.Structure mainly comprises pedestal and quality adjustment sheet.Wherein pedestal weight is 50kg, and each adjustment sheet weight is 20kg.Throwing cylindricality rigid body is of a size of the column structure that diameter is 500mm, according to the design of Fig. 4 and Fig. 5, can increase or reduce the quality of adjustment sheet number adjusting throwing cylindricality rigid body.The mass range of throwing cylindricality rigid body is 50～170kg.
High-speed camera instrument type selecting, by the explosion wave positive pressure time be a millisecond order of magnitude, negative pressure and peak value rise time are tens microseconds, determine select shooting number per second be 10
6or 10
7the video camera of opening.
Vacuum pump can be selected general industry vacuum pump.
Safety valve has two kinds of Main Functions.One, guarantee that vacuum pump is not damaged by explosion wave.Two, when vacuum pump quits work, isolated air and throwing cylindricality rigid body internal tank vacuum contacts.
The Vessel Design of throwing cylindricality rigid body is rectangular tank, wherein one side is inspection surface, inspection surface is made up of high-strength transparence plastic-steel, other face is that cast iron forms, the built-in padded coaming of flight container is safety screen, after explosive charge, the container of vacuum throwing cylindricality rigid body communicates with air and imports the shock wave in vertical direction that is mainly in container into, and explosive charge can not produce too large pressure to throwing cylindricality rigid body container.It is 10mmHT150 cast iron that the each cast iron face of throwing cylindricality rigid body container adopts thickness, and it is 20mm plastic-steel that high-strength transparence plastic-steel adopts thickness, and container height is 2m, and bottom surface is the square that length and width are 1m.
Apparatus to cause bursting adopts the conventional 8# instantaneous cap of industry and MFB-200 blasting machine, and detonator connects explosive and is placed in explosive container, then connects blasting machine.It is two steel rulers of 0.5mm length 1.5m that scale adopts minimum scale, and two days scales are vertically arranged on respectively the both sides of high-strength transparence plastic-steel wall, throwing Cylindrical Rigid height for reference.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 explosive container front view
Fig. 2 explosive container left view
Fig. 3 explosive container vertical view (mark 1 in Fig. 3 for explosive container, mark 2 is for laying explosive support)
Fig. 4 throwing cylinder pedestal front view and left view
Fig. 5 throwing cylinder pedestal vertical view
Fig. 6 throwing cylinder weight adjustment sheet front view and left view
Fig. 7 throwing cylinder weight adjustment sheet vertical view
The schematic diagram of Fig. 8 test macro (marks 1 for explosive container in Fig. 8, mark 3 is safety valve, mark 4 is safety screen, prevent that shock wave from producing large impact to high strength plastic-steel face, mark 5 is the high strength plastic-steel face of throwing cylindricality rigid body container, and these face both sides are vertically laid and surveyed high scale, mark 6 is throwing cylindricality rigid body, mark 7 is high-speed camera instrument, and mark 8 is vacuum pump, and mark 9 is data analysis system)
Embodiment
As Fig. 8 sets up experiment test system, first 100g explosive to be measured is connected complete with detonator, be placed in explosive container (mark 1 in Fig. 8), making bottom surface diameter is that powder column and the throwing cylindricality rigid body (mark 6 in Fig. 8) of 38mm is closely affixed, (mark 3 in Fig. 8) opens the safety-valve, start vacuum pump (mark 8 in Fig. 8), in the time that vacuum pump instrument shows vacuum state, first closed safe valve cuts out vacuum pump again, open and debug high-speed camera instrument (marking 7 in Fig. 8), after the normal work of high-speed camera instrument, start shooting state, after ready, utilize blasting machine to ignite the detonator that connects explosive to be measured, after explosive initiation, throwing Cylindrical Rigid cognition is moved by throwing in the vertical direction, scale can show the motion height H of throwing cylindricality rigid body, the corresponding moment moving image that utilizes high-speed camera instrument to take is the size height of certain moment throwing cylindricality rigid body correspondence on scale, utilize time and height relationships, corresponding each undetermined coefficient of (4) formula that obtains, simultaneous (3) formula and (4) formula, can obtain the blast surface of contact applied pressure value in each moment, certainly comprise the maximal value of the interface pressure that explodes.
Claims (1)
1. test a proving installation for explosive charge interface pressure, proving installation comprises container, apparatus to cause bursting and the scale of explosive container, throwing cylindricality rigid body, high-speed camera instrument, vacuum pump, safety valve, throwing cylindricality rigid body; Wherein explosive container is characterized as: external diameter 350～450mm, and internal diameter 120～150mm, height is the cylindrical vessel of the HT350 casting pig casting of 400mm; Throwing Cylindrical Rigid body characteristics is: pedestal weight is 50kg, and each adjustment sheet weight is 20kg, the right cylinder of the HT350 casting pig casting that mass range is 50～170kg; High-speed camera instrument is characterized as: shooting number per second is 10
6or 10
7video camera; The container of throwing cylindricality rigid body is characterized as: a vertical side is sightingpiston, and sightingpiston is the thick high-strength transparence plastic-steel of 20mm, and all the other each is cast iron face, it is 10mmHT150 cast iron that cast iron face adopts thickness, container is long hair body, and container height is 2m, and bottom surface is the square that length and width are 1m; Apparatus to cause bursting is characterized as: industrial 8# instantaneous cap and MFB-200 blasting machine; Scale is characterized as: minimum scale is two steel rulers of 0.5mm length 1.5m, and two days scales are vertically arranged on respectively the both sides of high-strength transparence plastic-steel wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320774089.8U CN203630126U (en) | 2013-11-28 | 2013-11-28 | Device for testing acting pressure of explosion contact surface of explosive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320774089.8U CN203630126U (en) | 2013-11-28 | 2013-11-28 | Device for testing acting pressure of explosion contact surface of explosive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203630126U true CN203630126U (en) | 2014-06-04 |
Family
ID=50816589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320774089.8U Expired - Fee Related CN203630126U (en) | 2013-11-28 | 2013-11-28 | Device for testing acting pressure of explosion contact surface of explosive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203630126U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535285A (en) * | 2014-12-18 | 2015-04-22 | 公安部第一研究所 | Testing method for shock wave attenuation rate of explosive-removal personal protective device |
| CN104931334A (en) * | 2015-06-01 | 2015-09-23 | 武汉大学 | Loading and unloading device based on explosion self-destruction effect |
-
2013
- 2013-11-28 CN CN201320774089.8U patent/CN203630126U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535285A (en) * | 2014-12-18 | 2015-04-22 | 公安部第一研究所 | Testing method for shock wave attenuation rate of explosive-removal personal protective device |
| CN104931334A (en) * | 2015-06-01 | 2015-09-23 | 武汉大学 | Loading and unloading device based on explosion self-destruction effect |
| CN104931334B (en) * | 2015-06-01 | 2017-12-08 | 武汉大学 | A kind of based on blast self-destruction plus discharge mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103645293B (en) | Method for testing actuating pressure of explosion contact surface of explosive and test device | |
| CN105486525B (en) | A kind of model test apparatus for carrying out underwater explosion research on centrifugation machine platform | |
| CN108828008B (en) | Explosive internal explosion power evaluation method based on shock wave overpressure and quasi-static pressure | |
| CN105353102B (en) | Blast comprehensive effect evaluation method in a kind of temperature and pressure explosive semi-hermetic tunnel | |
| CN106226176B (en) | Underwater explosion loading acts on lower rock dynamic mechanical test method | |
| CN102706224B (en) | Friction load loading device | |
| CN107656031A (en) | Gases at high pressure Impulsive load Testing Method of Safety for energetic material | |
| CN203630126U (en) | Device for testing acting pressure of explosion contact surface of explosive | |
| CN111707607A (en) | Friction sensitivity testing device and method | |
| CN107101873B (en) | A kind of measurement material under water under detonation dynamic response experimental provision | |
| CN105606454A (en) | Intensity testing device used for temperature-stress field coupling under rock mass expansion | |
| CN110726630A (en) | Explosion loading device based on one-dimensional strain condition and use method | |
| CN102323297B (en) | Method and device for measuring post-combustion effect of non-ideal explosive by underwater explosion method | |
| CN105403358A (en) | Shock-wave pressure-sensor on-site inspection and sorting method | |
| CN112285159B (en) | Method for measuring instantaneous oxygen concentration for explosive explosion suffocation effect evaluation | |
| CN203101223U (en) | Impact test device for measuring flowing pressure of discrete material | |
| CN110068410A (en) | Passive shock wave impulse measurement sensor based on momentum block | |
| CN110672795A (en) | Underground engineering anti-explosion model experimental device adopting explosive explosion loading mode | |
| CN202057622U (en) | Explosive work capacity testing device | |
| CN203163921U (en) | Apparatus for testing explosive working capacity | |
| CN208505806U (en) | A kind of explosively loading device based on uniaxial train condition | |
| CN205920017U (en) | Survey device of hollow glass microballon water -resistant isostatic pressing intensity | |
| CN111458097A (en) | Underwater structure collision test device | |
| CN105403376A (en) | Adapter for centrifugal machine underwater explosion test | |
| CN109870356A (en) | Multi-channel wide should broaden the propellant compression stress test device of temperature range high security |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20151128 |