DE1442844A1 - Method for inflating an inflatable device and device for carrying out the method - Google Patents

Description

Method including inflating an inflatable device and device sur implementation of the procedure

The invention relates to the inflation of inflatable devices and in particular to the generation of gas mixtures from carbon dioxide and feriipiinmmgaprociukten of so3. Inflation ( such devices suitable Ti''oibmittel,

At present, various types of inflatable devices find extensive use, for example as landing kiosks for helicopters νήΛ as floating equipment, such as puddles, boats, emergency ladders and the like. For many years, liquefied carbon dioxide has been considered one of the best. Druckmittelcjuelle.i for inflating such devices

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considered- mid swai * because of its high bearingsHo & ie _s ; be * = ■ HQB YerhaltiiiemaMg aletolgea Xsagsrdraeks, its "(Jn © nvstlnälieuiceit unä its low toxicity aowie because of its liJlgigkeit * at ^« lapsjiatujieii to su - 54 ^i? ö (-65 ^ · ^} if it _{escapes in a container?} ing closed t ₃ des a gas * ^ ₃ Bo Sticskatoff _f jsugeeeta ⁵ · is =

Weaa, however _{, Kohlendio ^ yd {} , aaoM @ ni it has been stored at a low temperature _s "quickly in © Inen Ygrliälfcnis« läSig gs? AS®K sufb.lasbartm Sa ^ x bsw-. Ia eise Hüll @ aing © - isitet w ± Tä miü eieh iiariß © ntspaiiaen kami, does it produce KohlengdM ^ egiiliTias iiBä killte? Κοηί ^ ίΛχαπ ^ α ^ & ΰ "what consequence has β dag iarifcrhallb the lai.rsieii & © it ₉ iia im lotfali requiredlisli Is _? Ani ^ ii «The tulle inflation B. errsialife

Bit MeI eager invention, la ³ ;. "'^ Ί. ·>Ϊ́;-.' Χ- Hi® B ^ r - ?. i'i, ^J -.! '- να / this difficulty cluroli di>: s StsravA-ffiittg a .toorän «iig susn raaölien inflating a Einri ^ lifeuag with Κο1αΐΘηά ± οπγ & _t that is to be stored at low temperatures.

.A further object of the invention is the creation of a Verfeißreiis uhö a Tarriohtung suitable for a closed system or for a system which is entrained in ambient air ₉ "

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A further aim of the disclosure is _{for the} preceding paragraphs in Qinf. & Ghev _f . practically applicable, reliable and economical way to achieve *

In the context of the invention, the stated objectives are generally achieved by featgesteilt _s ä &B; It is possible for the hot gaseous combustion products of propellants such as burning powders to be mixed with liquefied carbon dioxide so that the hot gases heat and gasify the carbon dioxide to obtain a desired pressure, the subsequent expansion of the carbon dioxide producing a cooling effect »Which let the temperature egg.1 Ben Sssg iiarabsetat so that ä & B demiscli has a temperature _t which the inflatable device can withstand»

Under certain operating conditions, however, the temperature of the mixture was not lowered sufficiently for the inflatable device to be certain May resist, or it was the pressure of the mixture to fully inflate the device at the time Cooling down to the ambient temperature insufficient «

Furthermore, it was found within the scope of the invention that the aforementioned difficulty can be avoided by

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that the hot gaseous products of combustion of propellants and liquefied Eohlenöiöxyd with a material of high Verdampfungswärae, for example, ethyl alcohol _s are mixed be further reduced so that the temperature of the hot Gaae and pressure of the mixture through the alcohol or the like is further increased.

The amount of heat to be generated for ^ ed® weight unit carbon dioxide at a given temperature can be used for operation in summer or at high ambient temperatures, ZcB. ~ 7 ⁰ C to 52 ⁰ C (20 ⁰ F to 125 ⁰ F) and during winter time or at lower ambient temperatures, aB »-29 ⁰ C Ms 27 ⁰ C (-20 ⁰ F to 80 ⁰ F) ₁ in the below determine the manner described in connection with the examples given »

It is also provided that a certain amount of heat is generated by the propellant for each unit of weight of carbon dioxide used and a certain amount of alcohol is used for each 252 kcal (1000 33 * $ * U,). These amounts can be used for operation in summer time or at high ambient temperatures, j§. | F% ~ 7 ° C to 52 ⁰ C (20 ⁰ F to 125 ⁰ F), and in winter time or at low temperatures, ζ. Β «, - 29 ⁰ C to 27 ⁰ C (-2O ⁰ F to 8O ⁰ F), through the use of more carbon dioxide, more propellant and

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less alcohol is changed in the interim than in the summer, as follows in connection with the. given examples is explained »Furthermore, the respective amounts can be set on the basis of a compromise for summer time = · and tfinterzeitjbetrieb _{s in} order to obtain a filling or charge with which within the temperature range of - 29 ⁰ O to 52 ⁰ C (-20 ° ? up to 125 ° F) can be worked *

A preferred embodiment of the invention is described in more detail below in connection with the accompanying drawing - " pointers ". . "■ -""

Fig. 1 is a schematic view of a closed

System using a Device for generating a gas mixture for inflating an inflatable device;

Fig, 2 is a view on an enlarged scale and in longitudinal section, partly in elevation, of the device for brewing the gas mixture j

Fig. 5 is a schematic view of a system at

which ambient air through the gas mixture with « to be led"

In the case of the one in Flg. 1 is an inflatable device 10, a gas generator 11 and a line 12 is provided through which the latter a gas

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mix-from. djsin. S'as, erEsiigsr directly su'r inflatable. Device, directed, is «. .Am. Such a closed. System. can-both · in.! «lift as.,. also" under water ". be-operated. =

Di® inflatable Tforrtchtmng 10 can be a, -: Sack of - 'any desired. Shape and size for use, for boats,. ^{^ 1} _{IoBe 9}

u. or Hubsehraubej ^ andektssen seia »....

2 shows the inside of the gas generator It £ ur des: G-asgeiEische.s _o , The gas generator comprises a "container ..- 15". Aur intake, yqji Kohlendio.scyd , an, AusüaSaufaata 16 ".. - ■ an its. outlet .1 J the ... line 12- _{. connected- is-t 3} ..-a. -.um-, to prevent a ride through the outlet, a chamber 19 is adjacent to the outlet for generating hot gas with a fuel charge 20 ₈ an electrically actuated igniter 2,1 sum Igniting the cargo and a channel 22. _g , through -. C which the hot gas © from the chamber into the interior of the container 15 to mix with the .carbon dioxide, .such.- a Soheitoensiclierung 24, which is destroyed if inside .de-a.; containera.-a. dangerous pressure ei? ~ - -'- '"■

In operation, the igniter 21 is used to ignite the cells ^ 20

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actuated so that the propellant generates hot gases which are mixed with the carbon dioxide in order to increase the pressure within the container 15 "u and thereby cause the destruction of the disk 18". This mixture exits through the outlet opening 17 and is 12 to the inflatable device 10 or to another point of use. When this happens, increase the hot gases the pressure of carbon dioxide, "which latter in its expansion, the hot gases through the Joule-Thomson efiect cool _t will proceed if the carbon dioxide suddenly relaxed from a high pressure to a much lower pressure so that the temperature of the mixture entering the inflatable device is neither too high to damage the sack nor too low * to allow carbonic clinee cords to form within the sack.

Experiments have shown that at ambient temperatures between -29 ⁰ O and 52 ⁰ C (-20 ⁰ F and 125 ⁰ F) the temperature of the gas mixture in the sack can be controlled by the ratio of the number of thermal units generated by each weight unit of carbon dioxide is changed. This ratio is higher at the lower ambient temperature than at the higher ambient temperatures. For example, at - 29 ⁰ C (-2O ⁰ F) about 38.81 kcal (154 B ₀ T ₀ U.) by the blowing agent for

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Each unit of weight of carbon dioxide can be generated, while at 52 ⁰ G (125 ⁰ P) about 36.31 kcal (144 BoToUa) can be generated by the propellant for each unit of weight of carbon dioxidea '"

A Treibraittelladung, the check has been found suitable $ is a powder of potassium perchlorate type, which can produce per 453 g (11b) about 438.1 kcal (1740 BTU "Therefore, by changing the weight of the La-- ₁ dung the desired number of thermal units to be generated can be determined within precise limits.

For the examples given below, the invention became a 1.59 obm (56 en. ft.) sack for a helicopter cushion to a pressure of about 0.21 atmospheres (3 psig) in less than four seconds through a container 11 for generation of a hot gas having a volume of about 5,715 liters (329 "cn. in.) and containing the following amounts of material inflatedί

Example I. - -._ · »β« -
ftüQfi19 / 119 -29 ⁰ C to L. 27 ⁰ G (p-2 0 ° to 80 ⁰ P) ORISINiÄL Working temperature range 3.325 kg (7, 33 lbs) Carbon dioxide 0.295 kg (0, 65 lbs) Charge 20 Bag temperature after the Äu & - '
blow . 149 ⁰ G. 0 ° P> maximum -29 ⁰ C (-20 ⁰ P) - "\. minimum BATH

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Example II

Working temperature range carbon dioxide charge 20

Bag temperature after inflation

Minimum

-7 ⁰ C to 52 ⁰ O (20 ° to 5.076 kg (6.78 lbs) Qy 254 kg (0.56 lbs)

15t, 7 ^U C

- 7 C

(505 ⁰ F) (20 ° P)

Sa the sack rests on the water or is partially immersed in the water during or immediately after inflation, there is a rapid heat exchange between the gas and the Water instead, which immediately reduces the higher gas temperature and the lower grass temperatures are increased, so that damage to the bag is avoided.

Numerous other experiments have shown that at ambient temperatures between ~ 29 ° 0 and 52 ⁰ G (-2Q ⁰ P and 125 ⁰ P) the temperature of the gas mixture entering the bag between about -54 ⁰ O (-50 ⁰ P) and about 71 ⁰ Q (160 ° P) may be maintained by the use of a material with a high latent heat of evaporation, by which it is ensured that the bridge of the gas mixture is maintained at a reasonable for roll inflate the device height * for example, at -29 ^east Ö (-20 ⁰ P) about 40.07 kcaI (159B, 3! _E tt)

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453 g (1 Ib) of carbon dioxide are generated by the propellant, while at 52 ⁰ O (125 ⁰ F) about 36.56 kcal (145 Bo (EU) are generated by the propellant per 453 g (1 Ib) of carbon dioxide which value is higher than the theoretically required heat so that the overall by inflating the Sackea the heat losses to the outside air and performed work is taken into account. "

Any suitable material which remains in the liquid state within the operating temperature range and has a high latent heat of vaporization can be used. Ethyl alcohol, (synthetic) can be bevoraugt, since it is readily available and inexpensive, easily -vermischt dsm with carbon dioxide in the container and can be held in the container together with the Kolilendioxyd _o Further, the presence of ethyl alcohol toil VYirkung no harmful to the components of the Systems.

The use of alcohol when operating in a high ambient temperature is particularly beneficial. When operating in a low ambient temperature, the alcohol does not reduce the temperature of the carbon dioxide to such an extent that snow formation occurs, but a smaller amount of alcohol can be used to regulate the temperature of the gas mixture than when operating at high temperature. At-

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Specifically, at -29 ° C (-2O ⁰ I ¹ ) about 0.181 kg (0.40 lbs) of alcohol are used for each 252 kcal (1000 BTU) generated by the charge, while at 52 ⁰ C (125 ⁰ F) about 0.299 kg (0 _o 66 lbs) of alcohol are used for ^ e 252 kcal (1000 BTU) generated by the cargo.

For the further examples of the invention given below, a sack of 1.59 obm (56 cu.ft.) was used for a helicopter cushion to a pressure of about 0.21 atmospheres (3 paig) through a container 11 in less than four seconds Generating hot gas having a volume of about 5,735 (350 CUoin.) And containing the following amounts of material inflated:

Example III

Working temperature range - 29 ° C to 27 ° 0 (-20 ⁰ F to 8O ⁰ F)

Carbon dioxide 3.302 kg (7.28 lbs)

Load 20 0.299 kg (0.66 lbs)

Ethyl alcohol 0.209 kg (0.46 lbs)

Bag temperature range - 15.56 ° 0-57.78 ^o C (4 to 136 ⁰ F)

Example IY

Working temperature range - 7 ⁰ O to 52 ⁰ C (20 ⁰ F to 125 °?)

Carbon dioxide 3.125 kg (6.89 lbs)

Load 20 0.259 kg (0.57 lbs)

Ethyl alcohol 0.299 kg (0.66 lbs)

Bag temperature range 2.22 ⁰ C - 68.33 ° C (36 to 155 ⁰ F)

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- 29 ⁰ G tie 52 ⁰ C (-20 ° Ms 125 ⁰ F carbon dioxide 3 _f 325 leg '(7.33 lbs)

Load 20 0.304 kg (0.67 lbs)

Ethyl alcohol 0.408 kg (0.90 lbs)

corner temperature range - 1.11 ⁰ O - 7-1.11 ⁰ C <30 ° to 160 ⁰ I?)

From further experiments it has been shown that after the preceding the given examples, the mixtures obtained are also suitable for inflating a floating device are, in particular a facility with a proportional, moderately large hall volume

Although the meeting, for example, in connection with Carbon dioxide has been described, other compounds can also be used can be used instead of carbon dioxide. These compounds should and should have a comparable relaxed volume to weight ratio be gaseous and have a high vapor pressure within the desired operating temperature range around the Sack sufficiently inflated. Examples of such compounds are ammonia, Athens, propylene, and nitrogen oxide Ammonia can be used in cases where its dangerous, toxic and corrosive effects and its

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high solubility in water can be accepted «.

In Fig. 3, a system is shown that an inflatable device 10, a gas generator 11, for example from of the type described in connection with Fig. 2, a line 12 through which the gas mixture from the generator ' can be passed to the device, and an air suction device 13 of conventional type, which is attached to the Line 12 is connected and serves to suck in air from the environment and this into the inflatable Device to initiate.

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• Such a system makes the temperature of a hot one Gas mixture reduced during inflation and the amount of gas introduced into the inflatable device Media increased. Such a device is suitable for use in cases where an underwater operation is not required.

From the foregoing it can be seen that the invention a simple, practical, and economical method of inflating inflatable devices within created a wide temperature range without damaging the inflatable device by the action of heat became"

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Claims (1)

4H . . L-52 487 29 July 1968 Claims Method of inflating an inflatable device, according to which gases are generated under pressure in a confined zone ₃ the gases are mixed with carbon dioxide under pressure in the zone to increase the pressure of the carbon dioxide, the mixture of gases and carbon dioxide is released from the zone * the pressurized carbon dioxide mixed with the gases is depressurized in order to cool the gases, and the expanded mixture is introduced into the inflatable device, characterized in that a sufficient quantity of hot gas is formed to make 2 wipes about 36, 31 kcal (144 BTÜ.) And about 40.0? kcal (159 BTl) per Q, over 53 kg of carbon dioxide to be generated in order to enable the device to be completely inflated in the shortest possible time by largely eliminating the formation of carbonic acid snow. 2. The method according to claim 1, characterized in that surrounding Air is nitgefuhrt through the mixture of gases and carbon dioxide and introduced with this into the inflatable device will. BAD ORiQlNAL 098 12/1124 L-52.487 5 · The method according to claim 1, characterized in that the Case with miniem flussdf '* ^ material to be mixed * the one height. has latcmte evaporation water and is evaporated. 4. The method according to claim 3 # characterized «that the liquid material contains ethyl alcohol. 5. The method according to claim 3 or H _9, characterized in that the · «wiping about 0.181 kg and about 0.3 * 19 kg of ethyl alcohol old the 6a · and the carbon dioxide in the zone for each 252 kcal ClOOO B.T.O. produced by the hot gas) be mixed. 6. Device for performing the method according to claims 1 to 5 to generate a mixture of cooled gases below low pressure using an expandable KlQiI-Bitte.Is and a gas-generating pyrotechnic !! Materials, characterized in that there are approximately 0.25 kg to 0.3 kg of the material present when the material is ignited can generate an amount of heat of about 252 to 292.3 kcal. 7. Apparatus according to claim 6, characterized * that the coolant surrounds the pyrotechnic material and this opposite is insulated and the coolant is about 3.125 kg up . . BAD ORIG / n _AL - 15 - _ 809812/1124 3.325 kg of carbon dioxide and about 0.209 kg of Xt & ylallr.efooX, the total materialaeage being about 3.5 $ to 4.03 ^ S, usid aicSi (tea isolated Ktlhiaittel beiaa eating sins de ^ technical Hasse mixed with the light gases. BAD ORlSINAL 8 0 9812 / ΪΪ24