CN106353206A - Rapid closing device for air cannon - Google Patents
Rapid closing device for air cannon Download PDFInfo
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- CN106353206A CN106353206A CN201610945391.3A CN201610945391A CN106353206A CN 106353206 A CN106353206 A CN 106353206A CN 201610945391 A CN201610945391 A CN 201610945391A CN 106353206 A CN106353206 A CN 106353206A
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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Abstract
The invention discloses a rapid closing device for an air cannon. The air cannon comprises a high-pressure air chamber and a launching tube; the rapid closing device comprises a rapid closing air chamber, an assisted gas chamber, an I-shaped piston and a diaphragm bursting device; the rapid closing air chamber and the assisted gas chamber are partitioned through a high-pressure diaphragm; the assisted gas chamber and the high-pressure air chamber are partitioned through a baffle plate; two ends of the I-shaped piston are respectively arranged in the assisted gas chamber and the high-pressure air chamber; and the diaphragm bursting device is arranged in the assisted air chamber and is fixedly connected with the I-shaped piston. According to the rapid closing device for the air cannon, the high-pressure diaphragm between the assisted gas chamber and the high-pressure air chamber is triggered through the diaphragm bursting device, so that a channel between high-pressure air chamber and the launching tube is rapidly closed by the piston, and further the positive pressure acting time of shock waves loaded on a test piece can be shortened; and by adjusting the parameters of the rapid closing device, the positive pressure acting time of the shock waves can be adjusted, and a series of tests of different positive pressure acting times under the identical shock wave peak overpressure value loading conditions can be realized.
Description
Technical field
The present invention relates to shock-wave analog load test technical field, more particularly, to a kind of quick closedown for air bubble
Device.
Background technology
It is often necessary to shock-wave analog load test is carried out to subjects in national defence and field of industrial production, such as anti-
Quick-fried building and the impact test of structure, shock wave load test of preventer etc..General explosion wave loading method,
Including direct fieldization quick-fried and using blast wave analog load.
Blast wave analog is that a kind of test that engineering structure, weaponry can be carried out with blast wave load test is used
Device, its type of drive can be driven and drive of high-pressure gas using explosive.The blast wave analog driving in view of explosive
Safe examination and approval procedures are complicated, higher to security of system design requirement, in civil structural shock resistance, Protective Research field, adopt
It is a kind of good test method that drive of high-pressure gas realize shock wave to load.
Using the blast wave analog of drive of high-pressure gas mode, it realizes principle, structure and trigger mechanism and one-level
Air bubble is identical, and main air gun device is made up of transmitting tube, plenum chamber and relieving mechanism (trigger mechanism), both differences
Be: when for explode wave simulation when, do not load bullet between the plenum chamber of blast wave analog and transmitting tube.Experiment
When, first to plenum chamber insufflation gas, after air chamber internal gas pressure reaches certain value, by relieving mechanism high-speed communication high pressure gas
Room and transmitting tube, gases at high pressure are loaded into by testpieces in specified pilot region after transmitting tube, add on testpieces surface
Carry certain peak overpressure and the shock wave of certain positive pressure time, thus completing blast wave load test.
But main air big gun structure yet suffers from a prominent question: base in the application for the technology of the wave simulation that explodes
In the blast wave analog of air bubble technology, can realize positive pressure of shock wave peak value p's by adjusting the pressure of plenum chamber
Controlled；But, once shaping, in test, the positive pressure time t of shock wave is uncontrollable, is illustrated in figure 1 and acts on for apparatus structure
Shock wave oscillogram on testpieces.
Based on the blast wave analog of main air big gun structure, reach for making to act on the positive pressure of shock wave on testpieces
Certain peak value p, needs the volume v according to plenum chamber0And the volume v of transmitting tube1, determine high pressure according to the equation of gas state
The blowing pressure p of air chamber0, the equation of gas state is:
Wherein γ is gas adiabatic coefficent.When air bubble structure one timing, for reaching peak overpressure p, height can be calculated
The pressure p of plenum chamber0.
After air bubble manufacture and assembling, volume v of plenum chamber0Fixing, and the bore that high pressure gas indoor gas flow out
Fixing, this allows for certain pressure p0Gases at high pressure determine by time of transmitting tube, that is, shock wave positive pressure time t is solid
Fixed.For common main air big gun, do not obtain larger positive pressure of shock wave peak value p, the pressure p in plenum chamber0Larger, lead
The time causing gas release in gases at high pressure is positive pressure time typically in second-time.And the positive pressure that conventional explosives produce
Time, this made blast wave analog based on main air big gun structure it is difficult to be used for often simulating typically in a few tens of milliseconds level
The shock wave that rule explosive charge produces.
Content of the invention
The purpose of the present invention is that provides a kind of rapid-closing device for air bubble to solve the above problems.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of rapid-closing device for air bubble, described air bubble includes plenum chamber and transmitting tube, described quick
Shutoff device, described plenum chamber and described transmitting tube serial communication, described rapid-closing device includes quick closedown air chamber, auxiliary
Air chamber, " work " type piston and membrane-repturing device, described quick closedown air chamber, described auxiliary air chamber and described plenum chamber are sequentially connected, institute
State and separated by high pressure diaphragm between quick closedown air chamber and described auxiliary air chamber, described auxiliary air chamber and described plenum chamber pass through gear
Plate separates, and described baffle center is provided with through hole, and described " work " type piston passes through described through hole, and the two of described " work " type piston
End is separately positioned in described auxiliary air chamber and described plenum chamber, described membrane-repturing device be arranged in described auxiliary air chamber and with described
" work " type piston is fixedly connected；
Described " work " type piston includes relief piston, piston rod and sealing piston, and described relief piston is arranged on described auxiliary
In air chamber, and described auxiliary air chamber is divided into pressure regulating cavity and damping cavity, described membrane-repturing device be located at described pressure regulation intracavity, and with described
Relief piston is fixedly connected, and described sealing piston is arranged in described plenum chamber, and coaxial with the air inlet of described transmitting tube
Setting, the first end of described piston rod is fixedly connected with described relief piston, and the second end of described piston rod passes through described through hole
It is fixedly connected with described sealing piston；
Specifically, the diameter of described relief piston is equal with the internal diameter of described auxiliary air chamber, and described relief piston is auxiliary with described
The medial wall sealing slidable connection of air chamber, the diameter of described piston rod is equal with the internal diameter of described through hole, described piston rod and
The medial wall sealing slidable connection of described through hole, in the air inlet with diameter greater than described transmitting tube of described sealing piston
Footpath.
Preferably, the trachea being connected with described quick closedown air chamber, described pressure regulating cavity, described damping cavity and described high pressure chest
On be respectively arranged with quick closedown air valve, pressure regulation air valve, damping air valve and High-pressure air valve.
Further, described membrane-repturing device is connected by adjusting screw with described relief piston.
The beneficial effects of the present invention is:
A kind of rapid-closing device for air bubble of the present invention triggers auxiliary air chamber and quick closedown air chamber by membrane-repturing device
Between high pressure diaphragm, make piston by the passage quick closedown between plenum chamber and transmitting tube, thus shorten be loaded into test
Shock wave positive pressure time on part, and by adjusting the parameter of rapid-closing device, the work of shock wave malleation can be adjusted
With the time, realize under uniform impingement ripple peak overpressure loading environment, the campaign of different positive pressure time.
Brief description
Fig. 1 is that a kind of air bubble of rapid-closing device for air bubble of the present invention acts on rushing on testpieces
Hit waveform figure；
Fig. 2 is a kind of structural representation of rapid-closing device for air bubble of the present invention；
Fig. 3 is the structural representation of air bubble of the present invention；
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings:
As shown in Figures 2 and 3, a kind of rapid-closing device for air bubble of the present invention, air bubble includes plenum chamber
And transmitting tube, rapid-closing device, plenum chamber and transmitting tube serial communication, rapid-closing device include quick closedown air chamber,
Auxiliary air chamber, " work " type piston and membrane-repturing device, quick closedown air chamber, auxiliary air chamber and plenum chamber are sequentially connected, quick closedown air chamber
Separated by high pressure diaphragm and auxiliary air chamber between, auxiliary air chamber and plenum chamber are separated by baffle plate, and baffle center is provided with through hole,
" work " type piston passes through through hole, and the two ends of " work " type piston are separately positioned in auxiliary air chamber and plenum chamber, and membrane-repturing device is arranged
It is fixedly connected in auxiliary air chamber and with " work " type piston；
" work " type piston includes relief piston, piston rod and sealing piston, and relief piston is arranged in auxiliary air chamber, and will be auxiliary
Air chamber is divided into pressure regulating cavity and damping cavity, and membrane-repturing device is located at pressure regulation intracavity, and is fixedly connected with relief piston, and sealing piston is arranged
In plenum chamber, and it is coaxially disposed with the air inlet of transmitting tube, the first end of piston rod is fixedly connected with relief piston, piston
Second end of bar is fixedly connected through through hole with sealing piston；
The diameter of relief piston is equal with the internal diameter of auxiliary air chamber, and relief piston is slidably connected with the medial wall sealing of auxiliary air chamber
Connect, the diameter of piston rod is equal with the internal diameter of through hole, piston rod seals slidable connection with the medial wall of through hole, sealing piston
With diameter greater than the internal diameter of the air inlet of transmitting tube, on the trachea being connected with quick closedown air chamber, pressure regulating cavity, damping cavity and high pressure chest
It is respectively arranged with quick closedown air valve, pressure regulation air valve, damping air valve and High-pressure air valve, membrane-repturing device passes through adjustable spiral shell with relief piston
Bar connects.
A kind of operation principle of the rapid-closing device for air bubble of the present invention is as follows:
Step 1): by pressure regulation air valve to pressure regulation intracavity insufflation gas so that pressure regulating cavity pressure p2More than damping intracavity gas
Pressure p1, and:
p2×s2>p1×s1
Now, relief piston is bullied and is pressed to front movement, until sealing piston compresses and block the air inlet of transmitting tube, closes
Plenum chamber, s are closed2For the contact area of relief piston and pressure regulating cavity, s1Contact area for relief piston and damping cavity；
Step 2): by High-pressure air valve to insufflation gas in plenum chamber so that plenum chamber internal gas pressure reaches test institute
Need pressure p0；
Step 3): gases at high pressure are filled with into quick closedown air chamber by quick closedown air valve so that quick closedown air chamber
Internal gas pressure reaches p3, and p3Burst pressure less than high pressure diaphragm；
Step 4): pressure regulation intracavity gas are quickly discharged so that pressure regulating cavity inner high voltage gas is quickly arranged by pressure regulation air valve
Go out, pressure regulation cavity pressure p2Drop to rapidly p2', then piston left and right sides pressure differential is anti-phase, and has
p2′×s2<p1×s1
Now piston rearward moves rapidly, and sealing piston leaves the air inlet of transmitting tube, and high pressure gas indoor gas are at once
Enter transmitting tube, be loaded on the testpieces in front of transmitting tube by transmitting tube.
In actual tests, by changing the length of adjusting screw, can adjust after air bubble opens fire with artillery, sealing-plug 17 leaves
Transmitting tube 14 air inlet clashes into the time t of high pressure diaphragm 3 to membrane-repturing device 61；
Change the pressure p of quick closedown air chamber 13, during quick closedown being adjusted, the air pressure p of damping intracavity2", from
And change the speed of piston 16 right side movement, and then adjust membrane-repturing device 6 and clash into high pressure diaphragm 3 and arrive sealing-plug 17 compression transmitting tube 14
The time t of interface2.Two times above determines the unlatching duration t of air bubbleon=t1+t2, and it is loaded into rushing on testpieces 15
Hit the unlatching duration t that ripple positive pressure time t is proportional to air bubbleon.Conventional air big gun is that do not have closing function.
By the air bubble in the present invention when carrying out blast wave simulation test, this patent there is quick closedown function
Air bubble, it is possible to achieve air bubble open fire with artillery after quick closedown, reduce shock wave positive pressure time, such that it is able to simulate often
The shock wave that rule explosive charge produces.In addition, by adjusting above-mentioned two parameter, achievable air bubble open-interval is adjustable,
And then realize the adjustable of shock wave positive pressure time.Compared to conventional air big gun structure, this patent has quick closedown function
Air bubble, more suitable for conventional explosives blast produce shock-wave analog.
The main structure of the present invention:
(1) air bubble with quick closedown function of this patent, with quick closedown air chamber 1, and quick closedown air chamber 1
Separated by high pressure diaphragm 3 and auxiliary air chamber discharge chamber 5 between, quick closedown air chamber 1 has gases at high pressure and imports and exports；
(2) air bubble with quick closedown function of this patent, the piston 16 of its triggering, by the spiral shell of adjustable-length
Bar is connected with membrane-repturing device 6；
(3) air bubble with quick closedown function of this patent, after satisfaction opens fire with artillery requirement, by the auxiliary gas of quick release
Room discharge chamber 5 inner high voltage gas, realizes the quick unlatching of piston 16 mechanism；The membrane-repturing device 6 opened fire with artillery on rear piston 16 clashes into high pressure
Diaphragm 3, the gases at high pressure of quick closedown air chamber 1 make piston 16 adverse movement, and transmitting tube 14 quickly blocked by sealing-plug 17, realize
The quick closedown of air bubble；
(4) air bubble with quick closedown function of this patent, adopts adjusting screw 8 between piston 16 and membrane-repturing device 6
Connect, the variable-length of adjusting screw 8 so that open fire with artillery rear membrane-repturing device 6 clash into high pressure diaphragm 3 time adjustable；
(5) air bubble with quick closedown function of this patent, the pressure adjustable in quick closedown air chamber 1 is so that height
After pressuring film plate 3 rupture, the heterodromous speed of piston 16 mechanism is adjustable；
(6) air bubble with quick closedown function of this patent, employs rapid-closing device so that air bubble is opened fire with artillery
Sealing-plug 17 in piston 16 mechanism fast automatic can close transmitting tube 14 afterwards, and the unlatching duration of air bubble can be closed by quick
The pressure of room 1 and the length of adjusting screw 8 of holding one's breath is adjusting.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Any modification, equivalent and improvement of being made within principle etc., should be included in protection scope of the present invention.
Claims (4)
1. a kind of rapid-closing device for air bubble, described air bubble include plenum chamber and transmitting tube it is characterised in that:
Described rapid-closing device, described plenum chamber and described transmitting tube serial communication, described rapid-closing device includes quickly closing
Hold one's breath room, auxiliary air chamber, " work " type piston and membrane-repturing device, described quick closedown air chamber, described auxiliary air chamber and described plenum chamber according to
Secondary connection, is separated by high pressure diaphragm between described quick closedown air chamber and described auxiliary air chamber, described auxiliary air chamber and described high pressure
Air chamber is separated by baffle plate, and described baffle center is provided with through hole, and described " work " type piston passes through described through hole, and described " work "
The two ends of type piston are separately positioned in described auxiliary air chamber and described plenum chamber, and described membrane-repturing device is arranged in described auxiliary air chamber
And be fixedly connected with described " work " type piston；
Described " work " type piston includes relief piston, piston rod and sealing piston, and described relief piston is arranged on described auxiliary air chamber
Interior, and described auxiliary air chamber is divided into pressure regulating cavity and damping cavity, described membrane-repturing device is located at described pressure regulation intracavity, and with described pressure regulation
Piston is fixedly connected, and described sealing piston is arranged in described plenum chamber, and is coaxially disposed with the air inlet of described transmitting tube,
The first end of described piston rod is fixedly connected with described relief piston, the second end of described piston rod pass through described through hole with described
Sealing piston is fixedly connected.
2. a kind of rapid-closing device for air bubble according to claim 1 it is characterised in that: described relief piston
Diameter equal with the internal diameter of described auxiliary air chamber, the medial wall of described relief piston and described auxiliary air chamber seals slidable connection,
The diameter of described piston rod is equal with the internal diameter of described through hole, and described piston rod is slidably connected with the medial wall sealing of described through hole
Connect, the internal diameter of the air inlet with diameter greater than described transmitting tube of described sealing piston.
3. a kind of rapid-closing device for air bubble according to claim 2 it is characterised in that: with described quick pass
Hold one's breath and be respectively arranged with quick closedown air valve, tune on the trachea that room, described pressure regulating cavity, described damping cavity and described high pressure chest connect
Pressure valve, damping air valve and High-pressure air valve.
4. a kind of rapid-closing device for air bubble according to claim 2 it is characterised in that: described membrane-repturing device with
Described relief piston is connected by adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945391.3A CN106353206B (en) | 2016-10-26 | 2016-10-26 | Quick closing device for air cannon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945391.3A CN106353206B (en) | 2016-10-26 | 2016-10-26 | Quick closing device for air cannon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106353206A true CN106353206A (en) | 2017-01-25 |
| CN106353206B CN106353206B (en) | 2023-08-18 |
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ID=57864177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610945391.3A Active CN106353206B (en) | 2016-10-26 | 2016-10-26 | Quick closing device for air cannon |
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| CN (1) | CN106353206B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344552A (en) * | 2018-03-16 | 2018-07-31 | 中国工程物理研究院总体工程研究所 | Separate type experimental facilities for research structure high temperature and high speed impact response |
| CN109781372A (en) * | 2019-03-27 | 2019-05-21 | 中国飞机强度研究所 | A kind of emitter for high magnitude thump physical test |
| CN114427949A (en) * | 2022-01-18 | 2022-05-03 | 黑龙江省体育科学研究所 | Angle-adjustable low-speed air push rod device and using method |
| CN114754963A (en) * | 2022-06-14 | 2022-07-15 | 中国飞机强度研究所 | Multistage air gun metal diaphragm filling system for airplane high-speed impact power test |
| CN115508036A (en) * | 2022-10-12 | 2022-12-23 | 山东大学 | Multipurpose dynamic impact loading device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344552A (en) * | 2018-03-16 | 2018-07-31 | 中国工程物理研究院总体工程研究所 | Separate type experimental facilities for research structure high temperature and high speed impact response |
| CN108344552B (en) * | 2018-03-16 | 2023-12-29 | 中国工程物理研究院总体工程研究所 | Separated experimental equipment for researching high-temperature high-speed impact response of structure |
| CN109781372A (en) * | 2019-03-27 | 2019-05-21 | 中国飞机强度研究所 | A kind of emitter for high magnitude thump physical test |
| CN114427949A (en) * | 2022-01-18 | 2022-05-03 | 黑龙江省体育科学研究所 | Angle-adjustable low-speed air push rod device and using method |
| CN114427949B (en) * | 2022-01-18 | 2024-05-14 | 黑龙江省体育科学研究所 | Angle-adjustable low-speed air push rod device and use method thereof |
| CN114754963A (en) * | 2022-06-14 | 2022-07-15 | 中国飞机强度研究所 | Multistage air gun metal diaphragm filling system for airplane high-speed impact power test |
| CN114754963B (en) * | 2022-06-14 | 2022-08-26 | 中国飞机强度研究所 | Multistage air gun metal diaphragm filling system for airplane high-speed impact power test |
| CN115508036A (en) * | 2022-10-12 | 2022-12-23 | 山东大学 | Multipurpose dynamic impact loading device and method |
| CN115508036B (en) * | 2022-10-12 | 2024-06-07 | 山东大学 | Multipurpose dynamic impact loading device and method |
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| Publication number | Publication date |
|---|---|
| CN106353206B (en) | 2023-08-18 |
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