CN103322857A - Small two-stage light-gas gun - Google Patents
Small two-stage light-gas gun Download PDFInfo
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- CN103322857A CN103322857A CN2013102794133A CN201310279413A CN103322857A CN 103322857 A CN103322857 A CN 103322857A CN 2013102794133 A CN2013102794133 A CN 2013102794133A CN 201310279413 A CN201310279413 A CN 201310279413A CN 103322857 A CN103322857 A CN 103322857A
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Abstract
The invention discloses a small two-stage light-gas gun and relates to a light-gas gun. The small two-stage light-gas gun comprises a cylinder barrel, a pressure transmitting tube, a pressing column, a launching tube, a piston handle, a pressure transmitting body, a membrane, a membrane rupturing device, a first sealing ring, a metal sealing ring, a support and a plurality of supporting seats; a piston on the piston handle is in sliding contact with the inner circumferential surface of a gas chamber; one end of the pressure transmitting tube is connected with a gas port in a threaded manner, and the pressure transmitting tube is hermetically connected with the pressing column; the pressure transmitting body is mounted in the pressure transmitting tube; the first sealing ring and the metal sealing ring are mounted in a mounting groove from the inside to the outside, the membrane is hermetically connected with the membrane rupturing device, and the membrane rupturing device is hermetically connected with the launching tube; the cylinder barrel is mounted on the support, and the pressure transmitting tube and the launching tube are respectively detachably connected onto the supporting seats. The small two-stage light-gas gun has the advantages that problems that an existing light-gas gun is driven by gunpowder at a primary stage, accordingly, environments are polluted, occupied space is large, sealing cannot be carried out in a membrane rupturing procedure implemented by the aid of high-pressure gas and the bullet launching speed cannot be increased are solved, and the small two-stage light-gas gun is used in fields of spacecrafts or research on material performance and the like.
Description
Technical field
The present invention relates to a kind of light-gas gun, be specifically related to the small-sized light-gas gun that a kind of two-stage adopts light gas.
Background technology
Light-gas gun can be launched the bullet of difformity, material, satisfy various high speeds, ultrahigh speed experiment demand, at present in kinetic energy weapon effect study, terrestrial space physical study, spacecraft shield research, under the high strain rate be used widely in the field such as material property research, is the most general high speed, ultrahigh speed driving arrangement.
The mini two-stage light gas gun that California Inst Tech USA and NASA (NASA) build jointly, the one-level gunpowder drives, and secondary uses helium or hydrogen, transmitting tube diameter 1.8mm, can be transmitted into 2-3km/s to the 22.7mg steel ball, the nylon ball of 3.6mg is transmitted into 5-6km/s.Mini two-stage light gas gun of Tokyo polytechnical university, the one-level gunpowder drives, and secondary uses hydrogen, and transmitting tube diameter 2.1mm can be transmitted into 5.91km/s to the aluminium alloy column of 13mg.The miniature two-stage light gas gun of U.S. Southwest Research Inst., the one-level gunpowder drives, and secondary uses hydrogen, and transmitting tube diameter 1.78mm can be transmitted into 7.5km/s to the aluminium ball of 0.3-0.9mg.Above several light-gas gun one-level all uses gunpowder to drive, although energy comparison is large, because the safety issue of gunpowder itself does not have gunpowder to use the unit of qualification to use, is unfavorable for the popularization of light-gas gun technology.
The one-level helium of Padova, Italy university drives two-stage light gas gun, pump line internal diameter 35mm, and transmitting tube diameter 4.72mm can accelerate to 5.5km/s with the body of 100mg, and can carry out 10 tests every day at least.This big gun has improved the shortcoming that the one-level gunpowder drives, but because its design of Sealing Structure is not very good, does not make this big gun reach the due power of its 35mm pump line.
Summary of the invention
The objective of the invention is to adopt gunpowder to drive for solving existing light-gas gun one-level, there is contaminated environment, take up room large, and can't seal and then can't improve the problem of the emission rate of bullet to gases at high pressure rupture of membranes process, and then a kind of compact two-stage light-gas gun is provided.
The present invention addresses the above problem the technical scheme of taking to be: a kind of compact two-stage light-gas gun of the present invention comprises cylinder barrel, connecting pipe, punching press post, transmitting tube, piston handle, pilot body, diaphragm, membrane-repturing device, the first sealing ring, metallic packing ring, bearing and a plurality of supporting seat; Described cylinder barrel is the cylinder barrel of closed at both ends, the middle part of one end of cylinder barrel is provided with gas port, and piston handle is installed in the cylinder barrel, the inner peripheral surface sliding-contact of the piston on the piston handle and air chamber, gas port and the two coaxial setting are pointed in the end of piston handle, and piston is divided into balance cylinder and air chamber with cylinder barrel;
The wherein middle part of an end face of described punching press post is provided with the first cylindrical hole, the middle part of the other end of punching press post is provided with the second cylindrical hole, the aperture of the second cylindrical hole is less than the aperture of the first cylindrical hole, be processed with bellmouth coaxial with the two and that be communicated with between the first cylindrical hole and the second cylindrical hole, the larger diameter end of bellmouth is communicated with the first cylindrical hole, and the smaller diameter end of bellmouth is communicated with the second cylindrical hole;
One end of connecting pipe is threaded with gas port, and the other end of connecting pipe is installed in the described wherein middle part of an end face of punching press post, and connecting pipe is connected with the punching press column sealing, and connecting pipe and the coaxial setting of the first cylindrical hole; The pilot body is installed in the connecting pipe, described pilot body comprises metal cylinder and nylon cylinder, one end of metal cylinder is inserted on the nylon cylinder, the inwall slipper seal of the outer wall of metal cylinder and connecting pipe, the inwall slipper seal of the outer wall of nylon cylinder and connecting pipe;
Described membrane-repturing device is cylindrical membrane-repturing device, the middle part of membrane-repturing device is processed with the taper gas port coaxial with the second cylindrical hole, one end of transmitting tube is installed in the middle part of the described other end of punching press post, be equipped with between punching press post and the transmitting tube with the circular film of the adjacent setting of punching press post and with the membrane-repturing device of the adjacent setting of transmitting tube, transmitting tube is communicated with the smaller diameter end of taper gas port and the two is coaxial, and the internal diameter of transmitting tube is identical with the internal diameter of the smaller diameter end of taper gas port;
Be provided with a circle mounting groove on the other end of punching press post, the first sealing ring and the first metallic packing ring are installed in the mounting groove from inside to outside, and the first sealing ring and the metallic packing ring setting that reclines, punching press post and diaphragm are tightly connected by the first sealing ring and the metallic packing ring that is installed on the punching press post, diaphragm and membrane-repturing device are tightly connected, and membrane-repturing device and transmitting tube are tightly connected;
Described cylinder barrel 1 is installed on the bearing, and described connecting pipe and transmitting tube are detachably connected on the supporting seat respectively.
The invention has the beneficial effects as follows: one, compact two-stage light-gas gun total length of the present invention shorter (the not enough 3m of total length), take up room little, simple to operate, experimental period short (can easily finish more than ten experiments in one day), smaller to the site condition requirement, be conducive to applying of light-gas gun technology; Two, the present invention adopts high pressure nitrogen or helium as drive source, than gunpowder, security and the feature of environmental protection of experiment have obviously been improved, need not gunpowder uses qualification can use light-gas gun of the present invention, for association area carry out at a high speed and the hypervelocity impact experimental study provides great convenience, placed the membrane-repturing device that to change at any time before the transmitting tube entrance, except helping rupture of membranes, outside the diaphragm damage transmitting tube of avoiding splitting, can also effectively reduce the light gas of high pressure to the ablation of transmitting tube porch, greatly reduce experimentation cost, improved conventional efficient, improved conventional efficient; Three, the diaphragm of the present invention's use does not directly contact transmitting tube, and benefit one is can increase gases at high pressure to the effective active area of diaphragm, makes diaphragm better by the predetermined way rapid crack propagation; The 2nd, protection transmitting tube entrance is not impacted by diaphragm, reduces the ablation of high temperature and high pressure gas, thereby improves transmitting tube service life, reduce experimental cost, and auxiliary membrane-repturing device cost is lower, can be used as expendable part often to change; Four, the dual-seal mode of the first sealing ring and metallic packing ring is adopted in the sealing of punching press post of the present invention and diaphragm, the first sealing ring is guaranteed to vacuumize and the effective sealing when being filled with hydrogen, metallic packing ring works when piston compression hydrogen reaches than hyperbar, guarantee that namely hydrogen is not revealed in the emission process, experimental results show that, this kind sealing means can be realized the sealing of hydrogen in the whole experimentation well, greatly improved capacity usage ratio, capacity usage ratio has improved 10%-30%, provides effective assurance for realizing high emission rate; Five, the supporting base of connecting pipe of the present invention and transmitting tube is used for pump line and transmitting tube are fixed on the base, and is simple in structure, fixed, is convenient to dismantle the operation of pump line and transmitting tube, can obviously improve conventional efficient; Six, the invention provides a kind of high efficiency, low pollute, take up room little, easy to operate, stablize the highest 6.5km/s of surpassing of emission rate and can be low-cost in the above speed of 6.5km/s, stable emission, repeated good compact two-stage light-gas gun.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention; Fig. 2 is cylinder barrel and the connecting pipe syndeton schematic diagram among Fig. 1; Fig. 3 is the punching press post; diaphragm; the structural representation that membrane-repturing device is connected with transmitting tube; Fig. 4 is connecting pipe; the punching press post; diaphragm; membrane-repturing device; transmitting tube and the overall structure schematic diagram that is connected the protective sleeve connection; Fig. 5 is the structural representation of pilot body; Fig. 6 is the overall structure schematic diagram of supporting seat; Fig. 7 is the first sealing ring of the present invention and the work schematic diagram of metallic packing ring under nature; Fig. 8 is the first sealing ring of the present invention and the work schematic diagram of metallic packing ring under vacuum state; Fig. 9 is the first sealing ring of the present invention and the work schematic diagram of metallic packing ring under low-pressure state; Figure 10 is the first sealing ring of the present invention and the work schematic diagram of metallic packing ring under high pressure conditions, and Figure 11 is the experimental waveform figure (this oscillogram is used for calculating velocity of shot) that utilizes device of the present invention to advance pellet injection to obtain by speed measuring device.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1-Fig. 6 present embodiment is described, a kind of compact two-stage light-gas gun of present embodiment comprises cylinder barrel 1, connecting pipe 2, punching press post 3, transmitting tube 4, piston handle 5, pilot body 6, diaphragm 9, membrane-repturing device 10, the first sealing ring 12, metallic packing ring 13, bearing 14 and a plurality of supporting seat 7; Described cylinder barrel 1 is the cylinder barrel of closed at both ends, the middle part of one end of cylinder barrel 1 is provided with gas port 101, piston handle 5 is installed in the cylinder barrel 1, piston 501 on the piston handle 5 and the inner peripheral surface sliding-contact of air chamber 1, gas port 101 and the two coaxial setting are pointed in the end of piston handle 5, and piston 501 is divided into balance cylinder 109 and air chamber 110 with cylinder barrel 1;
The wherein middle part of an end face of described punching press post 3 is provided with the first cylindrical hole 301, the middle part of the other end of punching press post 3 is provided with the second cylindrical hole 302, the aperture of the second cylindrical hole 302 is less than the aperture of the first cylindrical hole 301, be processed with bellmouth 303 coaxial with the two and that be communicated with between the first cylindrical hole 301 and the second cylindrical hole 302, the larger diameter end of bellmouth 303 is communicated with the first cylindrical hole 301, and the smaller diameter end of bellmouth 3-3 is communicated with the second cylindrical hole 302;
One end of connecting pipe 2 is threaded with gas port 101, and the other end of connecting pipe 2 is installed in the described wherein middle part of an end face of punching press post 3, and connecting pipe 2 is tightly connected with punching press post 3, and connecting pipe 2 and the 301 coaxial settings of the first cylindrical hole; Pilot body 6 is installed in the connecting pipe 2, described pilot body 6 comprises metal cylinder 601 and nylon cylinder 602, one end of metal cylinder 601 is inserted on the nylon cylinder 602, the inwall slipper seal of the outer wall of metal cylinder 601 and connecting pipe 2, the inwall slipper seal of the outer wall of nylon cylinder 602 and connecting pipe 2;
Described membrane-repturing device 10 is cylindrical membrane-repturing device, the middle part of membrane-repturing device 10 is processed with the taper gas port 10-1 coaxial with the second cylindrical hole 302, one end of transmitting tube 4 is installed in the middle part of the described other end of punching press post 3, be equipped with between punching press post 3 and the transmitting tube 4 with the circular film 9 of punching press post 3 adjacent settings and with the membrane-repturing device 10 of transmitting tube 4 adjacent settings, transmitting tube 4 is communicated with the smaller diameter end of taper gas port 10-1 and the two is coaxial, and the internal diameter of transmitting tube 4 is identical with the internal diameter of the smaller diameter end of taper gas port 10-1;
Be provided with a circle mounting groove on the other end of punching press post 3, the first sealing ring 12 and the first metallic packing ring 13 are installed in the mounting groove from inside to outside, and the first sealing ring 12 and metallic packing ring 13 setting that reclines, punching press post 3 is tightly connected by the first sealing ring 12 and the metallic packing ring 13 that is installed on the punching press post 3 with diaphragm 9, diaphragm 9 is tightly connected with membrane-repturing device 10, and membrane-repturing device 10 is tightly connected with transmitting tube 4;
Described cylinder barrel 1 is installed on the bearing 14, and described connecting pipe 2 and transmitting tube 4 are detachably connected on respectively on the supporting seat 7.
The described transmitting tube 4 of present embodiment is used for placing bullet 11, and the light gas of present embodiment can adopt hydrogen, nitrogen or helium.
Present embodiment solves the superhigh pressure sealing problem of punching press post and diaphragm contact position.Connecting pipe vacuumizes before the emission, and filling light gas (hydrogen, nitrogen or helium) all needs good sealing, on the punching press post and the diaphragm contact position install rubber seal additional and metallic packing ring can be realized sealing effectiveness; At present, in emission process, when wanting emission than low velocity, namely before the rupture of membranes light atmospheric pressure hour, rubber seal also can play good sealing effectiveness.But when wanting to launch high speed, can reach the hyperpressure of hundreds of MPa before the rupture of membranes in the high-voltage cone section, at this moment rubber ring can be damaged under the effect of super-pressure hydrogen, reveals hydrogen, wastes a lot of energy, wants the fair speed of launching and can't reach.If install quoit additional then can sustain the Hydrogen Vapor Pressure of superelevation, but quoit is difficult to and contact position keeps seamless contact the highly, just might leak when vacuumizing or be filled with hydrogen like this, can't realize the purpose that seals.The present invention combines the advantage of sealing ring and becket, has designed a kind of brand-new sealing means, namely adopts the mode of inside and outside double containment to place same groove jointly to use, and inner ring adopts sealing ring, and becket is adopted in the outer ring.
The specific embodiment two: in conjunction with Fig. 1-Fig. 6 present embodiment is described, the outer wall of the metal cylinder 601 of present embodiment and the inwall of connecting pipe 2 are by being sleeved on the rubber seal rings for seal on the metal cylinder 601; Diaphragm 9 is by being installed in rubber seal and its 10 sealing of rupture of membranes on the membrane-repturing device 10, membrane-repturing device 10 is tightly connected by rubber seal and the transmitting tube 4 that is installed on the membrane-repturing device 10, and connecting pipe 2 is tightly connected by rubber seal and the punching press post 3 that is installed on the punching press post 3.So arrange, guaranteed good seal in the process of compression hydrogen, the needs of the transmitted at high speed of bullet under high pressure or super-pressure have effectively been guaranteed, present embodiment has solved effective transfer problem of drive of high-pressure gas energy, missile velocity is by high pressure nitrogen or helium, a plurality of factor controllings such as piston, punching press post and diaphragm.Since the restriction of the air chamber allowable pressure of high pressure, the impossible unlimited air chamber pressure that increases high pressure, and the inconvenient arbitrarily change of the tapering of punching press post is so by changing three remaining factors, namely piston, hydrogen, diaphragm are optimized missile velocity.Want the missile velocity that reaches higher, Rupture of Membrane pressure should be enough high, the diaphragm secondary piston that splits must be fully enter cone, this just requires the piston can not be too light, but enough speed must be arranged, so, increase the weight of copper counterweight regulating piston in nylon piston back, weight too hour can't fully enter cone, and weight can not reach very high speed again too greatly, and diaphragm is broken in advance.Being filled with Hydrogen Vapor Pressure also must be controlled in the rational scope, air pressure too hour, amounts of hydrogen is few, very the high pressure energy is also limited even if reach, the time that acts on the bullet is too short, can't make bullet reach very high speed, and air pressure is difficult to make piston fully to enter cone when too large, can't reach enough Rupture of Membrane pressure, can't make equally bullet obtain very high speed.Diaphragm is a very crucial governing factor, diaphragm requires good toughness, central burst is even, split during rupture of membranes rather than downcut, too weak diaphragm can cause too early rupture of membranes, can't reach enough pressure, and too strong diaphragm may split or split insufficient, air release speed is fast not, affects bullet and accelerates.Other is identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 4 present embodiment is described, the first sealing ring 12 of present embodiment and the cross section of metallic packing ring 13 are circle.So arrange, effectively guaranteed pilot body compression hydrogen until rupture of membranes Hydrogen gas does not leak.Other is identical with the specific embodiment one or two.
The specific embodiment four: in conjunction with Fig. 3 and Fig. 4 present embodiment is described, the diaphragm 9 of present embodiment is stainless steel or aluminium alloy diaphragm, and its thickness is 1.5mm.During the actual use of present embodiment, the external diameter of diaphragm is less than the internal diameter of punching press column outlet place seam, and there is the cross cut channel center; Described membrane-repturing device places between diaphragm and the transmitting tube; make with high-strength steel; external diameter is identical with the diaphragm external diameter; endoporus is the taper gas port; larger diameter end one side of taper gas port is near diaphragm; purpose is that diaphragm is split from the center smoothly, and high pressure hydrogen enters transmitting tube smoothly, also plays the effect that protection transmitting tube porch HTHP hydrogen is ablated simultaneously.Other is identical with the specific embodiment one or two.
The specific embodiment five: in conjunction with Fig. 4 present embodiment is described, described the first metallic packing ring 13 of present embodiment is stainless steel sealing ring, and described the first sealing ring 12 is rubber seal.So arrange, stainless steel intensity is large, seals reliable and securely, and rubber seal rings for seal is effective, can satisfy the needs of the transmitted at high speed of bullet under high pressure or the super-pressure.Other is identical with the specific embodiment three.
The specific embodiment six: present embodiment is described in conjunction with Fig. 1 and Fig. 3, the internal diameter of the connecting pipe 2 of present embodiment is 3～5 times of internal diameter of transmitting tube 4, the length of connecting pipe 2 is 80～120 times of internal diameter of connecting pipe 2, and the length of transmitting tube 4 is 150～250 times of internal diameter of transmitting tube 4.So arrange, under the combination of the size of present embodiment, the emission rate of bullet can be above more than the 6.5km/s, and during use, the length of connecting pipe and transmitting tube, the unit of internal diameter are identical.Other and the specific embodiment one, two or five identical.
The specific embodiment seven: in conjunction with Fig. 4 present embodiment is described, the bus of the bellmouth 303 of the punching press post 3 of present embodiment and the angle between the center line are 11 °.So arrange, under the combination of the size of present embodiment, the emission rate of bullet can surpass more than the 6.5km/s.Other is identical with the specific embodiment six.
The specific embodiment eight: present embodiment is described in conjunction with Fig. 3; the described light-gas gun of present embodiment also comprises clamping protective sleeve 8; clamping protective sleeve 8 is the protective sleeve of open at both ends; be provided with a circle projection 201 on the outer wall of the other end of connecting pipe 2; be provided with a circle fin 401 on the outer wall of one end of transmitting tube 4; an end that clamps protective sleeve 8 is threaded with fin 401; the other end that clamps protective sleeve 8 is installed on the projection 201, and connecting pipe 2, punching press post 3, diaphragm 11, membrane-repturing device 10 and transmitting tube 4 five link together by clamping protective sleeve 8.So arrange, connect the faster convenience of dismounting, also played simultaneously the protective action of the compression leg that liquidates.Other and the specific embodiment one, two, five or seven identical.
The specific embodiment nine: present embodiment is described in conjunction with Fig. 1 and Fig. 6, described each supporting seat 7 of present embodiment comprises pedestal 701, depression bar 702, cutting ferrule 703 and bolt 704, the middle part of the upper end of pedestal 701 is processed with V-shaped groove, V-shaped groove is used for placing connecting pipe 2 or transmitting tube 4, depression bar 702 is arranged on the upper end of pedestal 701, one end and the pedestal 701 of depression bar 702 are rotationally connected, cutting ferrule 703 is rotationally connected with pedestal 701, be processed with jack on the cutting ferrule 703, the other end of depression bar 702 passes jack and is pressed on connecting pipe 2 or the transmitting tube 4 by the bolt 704 that is threaded with cutting ferrule 703.So arrange, be used for connecting pipe and transmitting tube are fixed on the base, simple in structure, fixed, be convenient to dismantle the operation of connecting pipe and transmitting tube, can obviously improve conventional efficient, test efficiency has improved 15%～20%.Other is identical with implementation side nine.
The specific embodiment ten: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the described light-gas gun of present embodiment also comprises the first switch valve 103, magnetic valve 102, Pressure gauge 108, check valve 105 and second switch valve 202, the lower end of balance cylinder 109 and air chamber 110 is respectively arranged with gas inlet pipe 104, the upper end of air chamber 110 is equipped with Pressure gauge 108, converging of two gas inlet pipe 104 is equipped with check valve 105 on the pipeline, the upper end of balance cylinder 109 is equipped with magnetic valve 102, gas port 101 places are provided with gas discharge tube 107, the first switch valve 103 is installed on the gas discharge tube 107, be provided with on the connecting pipe 2 and take out gas tube 203, take out second switch valve 202 is installed on the gas tube 203.So arrange, installed check valve additional, so that air chamber is safe and reliable, and after single test is finished, can be by giving first the inflation of balance cylinder, mobile piston rear end until the method for mobile piston reach sealed air chamber and connecting pipe, remaining gas in the air chamber of recovery high pressure is so that test next time continues to use, because connecting pipe is very little with air chamber phase specific volume, it not is too many that experiment rear gas chamber internal pressure descends, so, do like this and can greatly save gases at high pressure, improve capacity usage ratio, save cost, capacity usage ratio has improved more than 25%.Other and implementation side one, two, five, seven or nine identical.
Embodiment
It is that assembly or the length that the aluminium alloy column of 5mm, PC post that diameter is 5mm and diameter are 1.5mm aluminium ball is that the 15mm diameter is the steel column of 5mm that the bullet of the present embodiment adopts diameter, and experimental data is as shown in table 1.
Table 1 is compact two-stage light-gas gun emission experiment data of the present invention
Wherein, the emission rate of the bullet of experiment numbers 6 has reached 6.61km/s, and Figure 11 is the time interval signal that is contained in the experiment numbers 6 that the magnetic survey speed variator in transmitting tube exit measures, and wherein three magnetic coils evenly distribute, and spacing is 30mm.
The course of work
Illustrate in conjunction with Fig. 1～Figure 11, once complete emission test: the connecting pipe of packing into, piston, diaphragm, membrane-repturing device and bullet are connected and connect and finish.At first use the gas boosting pump that nitrogen or helium are filled with air chamber 110 by gas tube 104, because, the existence of check valve 105 is arranged, gas is introduced into balance cylinder 109, promote mobile piston 501 and move forward to gas port 101 place sealed air chamber 110, and with being connected of connecting pipe 2, when gas pressure reaches the controlled pressure of check valve 105, check valve 105 conductings, gas begins to enter air chamber 110, and the Pressure gauge on the air chamber 110 (high pressure gauge) 108 shows air chamber 110 internal pressures in real time, when reaching specified pressure, close air pump, stop inflation; By being filled with the hydrogen of specified pressure in the connecting pipe 2 of hydrogen cylinder after vacuumize, close charging valve; After ready, start magnetic valve 102, pressure moment reduction in the balance cylinder 109, mobile piston 501 disequilibriums, retreat rapidly, air chamber 110 is communicated with connecting pipe 2, and air chamber 110 inner high voltage gases expand rapidly, and the pilot body 6 in the promotion connecting pipe 2 is along the axial accelerated motion of connecting pipe 2, the hydrogen of compression pilot body 6 front ends constantly raises its pressure, when pilot body 6 arrived punching press post 3, nylon cylinder 602 entered cone, and the compression hydrogen volume diminishes rapidly, pressure raises rapidly, when reaching Rupture of Membrane pressure, diaphragm 9 breaks, and the high pressure hydrogen expansion promotes bullet 11 and accelerates to target velocity.After emission process is finished, next two kinds of selections are arranged: (1) opens the first switch valve 103 of gas discharge tube 107 if next not preparing then to do next has tested, and discharges in the air chamber 110 and the gases at high pressure in the connecting pipe 2; (2) if next continue to do next test, can give first air chamber 110 inflations until Pressure gauge 108 shows that force value begins to rise, this moment, mobile piston 501 blocked the second switch valve 202 of the air inlet of connecting pipe 2, stop inflation, open the valve of gas discharge tube 107, bleed off the gases at high pressure in the connecting pipe 2.After the connecting pipe 2 inner high voltage air releases; can dismantle the clamping protective sleeve 8 of punching press post 3; the connection that air chamber 1 is connected with connecting pipe; that unclamps supporting seat 7 screws bolt 704, opens depression bar 702, unloads punching press post 3; take off diaphragm 9 and membrane-repturing device 10; take out the pilot body 6 after entering to bore, clean punching press post 3 and connecting pipe 2, prepare to carry out next test.
Deformation when nature, does not all occur in the first sealing ring of the present invention and metallic packing ring; The first sealing ring of the present invention and metallic packing ring, as shown in Figure 7; When vacuum state, the first sealing ring is squeezed, and to the center line generation deformation of punching press post, has played certain punching press post and the sealing of diaphragm, as shown in Figure 8; When low-pressure state, the first sealing ring is squeezed, and deviates from the center line generation deformation of punching press post, has also played certain punching press post and the sealing of diaphragm, as shown in Figure 9; But when high pressure conditions, deformation occurs in the first sealing ring and metallic packing ring simultaneously, and all to the center line generation deformation that deviates from the punching press post, the two jointly liquidate compression leg and diaphragm have played good sealing, effectively improve the emission rate of bullet, as shown in figure 10.
Claims (10)
1. compact two-stage light-gas gun, it is characterized in that: described light-gas gun comprises cylinder barrel (1), connecting pipe (2), punching press post (3), transmitting tube (4), piston handle (5), pilot body (6), diaphragm (9), membrane-repturing device (10), the first sealing ring (12), metallic packing ring (13), bearing (14) and a plurality of supporting seat (7); Described cylinder barrel (1) is the cylinder barrel of closed at both ends, the middle part of one end of cylinder barrel (1) is provided with gas port (101), piston handle (5) is installed in the cylinder barrel (1), piston (501) on the piston handle (5) and the inner peripheral surface sliding-contact of air chamber (1), gas port (101) and the two coaxial setting are pointed in the end of piston handle (5), and piston (501) is divided into balance cylinder (109) and air chamber (110) with cylinder barrel (1);
The wherein middle part of an end face of described punching press post (3) is provided with the first cylindrical hole (301), the middle part of the other end of punching press post (3) is provided with the second cylindrical hole (302), the aperture of the second cylindrical hole (302) is less than the aperture of the first cylindrical hole (301), be processed with bellmouth (303) coaxial with the two and that be communicated with between the first cylindrical hole (301) and the second cylindrical hole (302), the larger diameter end of bellmouth (303) is communicated with the first cylindrical hole (301), and the smaller diameter end of bellmouth (303) is communicated with the second cylindrical hole (302);
One end of connecting pipe (2) is threaded with gas port (101), the other end of connecting pipe (2) is installed in the described wherein middle part of an end face of punching press post (3), connecting pipe (2) is tightly connected with punching press post (3), and connecting pipe (2) and the coaxial setting of the first cylindrical hole (301); Pilot body (6) is installed in the connecting pipe (2), described pilot body (6) comprises metal cylinder (601) and nylon cylinder (602), one end of metal cylinder (601) is inserted on the nylon cylinder (602), the inwall slipper seal of the outer wall of metal cylinder (601) and connecting pipe (2), the inwall slipper seal of the outer wall of nylon cylinder (602) and connecting pipe (2);
Described membrane-repturing device (10) is cylindrical membrane-repturing device, the middle part of membrane-repturing device (10) is processed with the taper gas port (10-1) coaxial with the second cylindrical hole (302), one end of transmitting tube (4) is installed in the middle part of the described other end of punching press post (3), be equipped with between punching press post (3) and the transmitting tube (4) with the circular film (9) of the adjacent setting of punching press post (3) and with the membrane-repturing device (10) of the adjacent setting of transmitting tube (4), transmitting tube (4) is communicated with the smaller diameter end of taper gas port (10-1) and the two is coaxial, and the internal diameter of transmitting tube (4) is identical with the internal diameter of the smaller diameter end of taper gas port (10-1);
Be provided with a circle mounting groove on the other end of punching press post (3), the first sealing ring (12) and the first metallic packing ring (13) are installed in the mounting groove from inside to outside, and the first sealing ring (12) and metallic packing ring (13) setting that reclines, punching press post (3) is tightly connected by the first sealing ring (12) and the metallic packing ring (13) that is installed on the punching press post (3) with diaphragm (9), diaphragm (9) is tightly connected with membrane-repturing device (10), and membrane-repturing device (10) is tightly connected with transmitting tube (4);
Described cylinder barrel (1) is installed on the bearing (14), and described connecting pipe (2) and transmitting tube (4) are detachably connected on respectively on the supporting seat (7).
2. a kind of compact two-stage light-gas gun according to claim 1, it is characterized in that: the inwall of the outer wall of metal cylinder (601) and connecting pipe (2) is by being sleeved on the rubber seal rings for seal on the metal cylinder (601); Diaphragm (9) is by being installed in rubber seal and membrane-repturing device (10) sealing on the membrane-repturing device (10), membrane-repturing device (10) is tightly connected by rubber seal and the transmitting tube (4) that is installed on the membrane-repturing device (10), and connecting pipe (2) is tightly connected by rubber seal and the punching press post (3) that is installed on the punching press post (3).
3. a kind of compact two-stage light-gas gun according to claim 1 and 2, it is characterized in that: the cross section of the first sealing ring (12) and metallic packing ring (13) is circle.
4. a kind of compact two-stage light-gas gun according to claim 1 and 2, it is characterized in that: diaphragm (9) is stainless steel or aluminium alloy diaphragm, and its thickness is 1.5mm.
5. a kind of compact two-stage light-gas gun according to claim 3, it is characterized in that: described metallic packing ring (13) is stainless steel sealing ring, and described the first sealing ring (12) is rubber seal.
6. according to claim 1,2 or 5 described a kind of compact two-stage light-gas guns, it is characterized in that: the internal diameter of connecting pipe (2) is 3～5 times of internal diameter of transmitting tube (4), the length of connecting pipe (2) is 80～120 times of internal diameter of connecting pipe (2), and the length of transmitting tube (4) is 150～250 times of internal diameter of transmitting tube (4).
7. a kind of compact two-stage light-gas gun according to claim 6, it is characterized in that: bus and the angle between the center line of the bellmouth (303) of punching press post (3) are 11 °.
8. according to claim 1; 2; 5 or 7 described a kind of compact two-stage light-gas guns; it is characterized in that: described light-gas gun also comprises clamping protective sleeve (8); clamping protective sleeve (8) is the protective sleeve of open at both ends; be provided with a circle projection (201) on the outer wall of the other end of connecting pipe (2); be provided with a circle fin (401) on the outer wall of one end of transmitting tube (4); an end that clamps protective sleeve (8) is threaded with fin (401); the other end that clamps protective sleeve (8) is installed on the projection (201) connecting pipe (2); punching press post (3); diaphragm (9); membrane-repturing device (10) and transmitting tube (4) five link together by clamping protective sleeve (8).
9. a kind of compact two-stage light-gas gun according to claim 8, it is characterized in that: described each supporting seat (7) comprises pedestal (701), depression bar (702), cutting ferrule (703) and bolt (704), the middle part of the upper end of pedestal (701) is processed with V-shaped groove, V-shaped groove is used for placing connecting pipe (2) or transmitting tube (4), depression bar (702) is arranged on the upper end of pedestal (701), one end of depression bar (702) and pedestal (701) are rotationally connected, cutting ferrule (703) is rotationally connected with pedestal (701), cutting ferrule is processed with jack on (703), and the other end of depression bar (702) passes jack and is pressed on connecting pipe (2) or the transmitting tube (4) by the bolt (704) that is threaded with cutting ferrule (703).
10. according to claim 1,2,5,7 or 9 described a kind of compact two-stage light-gas guns, it is characterized in that: described light-gas gun also comprises the first switch valve (103), magnetic valve (102), Pressure gauge (108), check valve (105) and second switch valve (202), the lower end of balance cylinder (109) and air chamber (110) is respectively arranged with gas inlet pipe (104), the upper end of air chamber (110) is equipped with Pressure gauge (108), be positioned on the gas inlet pipe (104) of air chamber (110) lower end check valve (105) is installed, the upper end of balance cylinder (109) is equipped with magnetic valve (102), gas port (101) locates to be provided with gas discharge tube (107), the first switch valve (103) is installed on the gas discharge tube (107), be provided with on the connecting pipe (2) and take out gas tube (203), take out second switch valve (202) is installed on the gas tube (203).
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