DK144252B

DK144252B - SUSPENSION FIREWORKS FOR PROJECTS

Info

Publication number: DK144252B
Application number: DK274577AA
Authority: DK
Inventors: M Rainio
Original assignee: Valmet Oy
Priority date: 1976-06-22
Filing date: 1977-06-21
Publication date: 1982-01-25
Also published as: DK144252C; SE7707046L; NO772102L; FI55728B; SE423649B; FI761815A; DE2727856C2; DE2727856A1; FI55728C; NO142548B; NO142548C; CH620767A5; DK274577A

Description

144252144252

Opfindelsen angår et stødbrandrør til projektiler, hvilket brandrør i afstand foran dets slagspindel har en smeltedel, der i retning mod slagspindelen er af dækket af et sikringselement.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a projectile shock tube which has a melting member spaced apart in front of its impact stem in the direction of the impact stem by a cover member.

5 Med såkaldt smeltedels sikring forsynede stødbrandrør anvendes bl.a. i projektiler til luftværnskanoner. Ved affyring af projektilet smelter smeltedelen under indflydelse af den af luftmodstanden frembragte varme sædvanligvis efter en flyvestrækning på ca. 40 -200 meter, hvorved stødb randrørets afsikringsmekanisme træder i 10 funktion, og slagspindelen kan bevæge sig fremefter. Når projektilet rammer målet, bevæger slagspindelen sig bagud, og en slagstift rammer en detonator, hvorved projektilet eksploderer. De hidtil kendte med smeltedel forsynede stødbrandrør har imidlertid visse mangler. I regnfuldt vejr rammes slagspindelen af regndråber, 15 efter at smeltedelen er smeltet. Dette forårsager let en uønsket eksplosion, hvilket vil sige, at projektilet eksploderer, længe før det rammer målet. I værste fald kan projektilet eksplodere allerede efter ovennævnte flyvestrækning på 40 - 200 meter. Denne mangel generer anvendelsen af eksempelvis luftværnsartilleri i regnfuldt 20 vejr.5 Shock burners fitted with so-called melting fuse are used, among other things. in projectiles for air defense cannons. When firing the projectile, the melting part, under the influence of the heat generated by the air resistance, usually melts after a flight distance of approx. 40 -200 meters, whereby the shock absorber's locking mechanism comes into operation 10 and the impact spindle can move forward. When the projectile hits the target, the impactor moves backward, and a impact pin strikes a detonator, thereby exploding the projectile. However, the hitherto known melting tubes have certain shortcomings. In rainy weather, the stroke spindle is hit by raindrops, 15 after the melting part is melted. This easily causes an unwanted explosion, which means that the projectile explodes long before it hits the target. At worst, the projectile can explode already after the aforementioned flight distance of 40 - 200 meters. This defect causes the use of, for example, air defense artillery in rainy 20 weather.

Samme problem opstår naturligvis også i forbindelse med andre med stødbrandrør forsynede projektiler. 1 2 3 4 5 6 7 8 9 10 11Of course, the same problem also arises in connection with other projectiles fitted with shock-fire pipes. 1 2 3 4 5 6 7 8 9 10 11

Formålet med opfindelsen er at afhjælpe den ovennævnte mangel.The object of the invention is to remedy the above-mentioned defect.

22

For at opnå dette formål er det med smeltedel forsynede stødbrand 3 rør ifølge opfindelsen ejendommeligt ved, at sikringselementet er en 4 i en første stilling mellem slagspindelen og smeltedelen anbragt 5 regnsikringsdel, der ved smeltning af smeltedelen er bevægelig 6 bort fra slagspindelen til en anden stilling mod et anslag og er 7 arreterbar i nævnte anden stilling. Derved vil regnsikringsdelen 8 hindre, at et stød fra en regndråbe bevæger slagspindelen. Når 9 stødbrandrøret derimod rammer en større og mere massiv genstand, 10 vil sikringsdelen gå i stykker ved det stød, der frembringes, og 11 projektilet vil eksplodere.In order to achieve this purpose, the melting fire 3 pipes according to the invention are characterized in that the securing element is a 4 in a first position between the impact spindle and the melting part 5 rain protection part which, when melting the melting part, is movable 6 away from the impact spindle to a second position. against an estimate and is 7 adjustable in said second position. Thereby, the rain protection portion 8 will prevent a shock from a raindrop from moving the impact stem. When, on the other hand, the 9 firefight strikes a larger and more massive object, 10 the fuse portion will break at the shock produced and 11 the projectile will explode.

2 1442522 144252

Opfindelsen vil i det følgende blive detaljeret beskrevet under henvisning til tegningen, på hvilken fig. la viser et skematisk snit i et med en smeltedel forsynet stød-brandrør ifølge opfindelsen, 5 fig. Ib et skematisk snit i det i fig. la viste stødbrandrør på det tidspunkt, hvor smeltedelen er smeltet, og brandrøret har indtaget sin funktionsstilling, fig. 2a et skematisk snit i en anden udførelsesform for stødbrand-røret ifølge opfindelsen, og 10 fig. 2b et skematisk snit i det i fig. 2a viste stødbrandrør på et tidspunkt, hvor smeltedelen er smeltet.The invention will be described in detail below with reference to the drawing, in which 1a is a schematic sectional view of a shock-burning pipe fitted with a melting element according to the invention; FIG. 1b is a schematic sectional view of the embodiment of FIG. 1a at the time when the melting member is melted and the fire pipe has assumed its operating position, fig. 2a is a schematic sectional view of another embodiment of the shock-fire tube according to the invention; and FIG. 2b shows a schematic section in the embodiment of FIG. 2a at a time when the fusing member is fused.

Det i fig. la viste stødbrandrør, som under ét er betegnet med 10, er forsynet med en smeltedel 11 og en slagspindel eller slaggli-15 der 13. Ifølge opfindelsen er der mellem smeltedelen 11 og slagspindelen 13 anbragt en regnsikringsdel 12. Ved denne udførelsesform består regnsikringsdelen 12 af en excentrisk anbragt cylinderdel med en flange 14. Når et med stødbrandrøret 10 ifølge fig. la forsynet projektil, f.eks. et projektil til en luftværnskanon, affy-20 res, smelter smeltedelen 11 under indflydelse af den som følge af luftmodstanden udviklede varme efter en flyvestrækning på ca.The FIG. 1a, which are generally designated 10, are provided with a melting part 11 and a stroke spindle or impact slide 13. According to the invention, a rain protection part 12 is arranged between the melting part 11 and the stroke spindle 13. an eccentrically disposed cylinder portion with a flange 14. When one with the shock tube 10 of FIG. la provided projectile, e.g. a projectile for an air defense cannon, is fired, the melt portion 11 melts under the influence of the heat developed as a result of the air resistance after a flight distance of approx.

40 - 200 meter. Derved træder regnsikringen ifølge opfindelsen i funktion.40 - 200 meters. In this way the rain protection according to the invention comes into operation.

25 Efter at smeltedelen 11 er smeltet, skyder brandrøret 10's afsikringsmekanisme ved hjælp af en fjederpåvirkning eller ved hjælp af et ved detonatorholderens drejning frembragt moment regnsikringsdelen 12 ind i det rum 15, i hvilket smeltedelen 11 tidligere var beliggende, og da regnsikringsdelen 12's tyngdepunkt ligger excentrisk, søger 30 regnsikringsdelen under indvirkning af centrifugalkraften mod den ene side af dette rum 15 og danner således med sin flange 14 en som regnsikring fungerende låsning, som det fremgår af fig. Ib. Regnsikrings delen kan også blot udgøres af en skive, der kan have et excentrisk beliggende hul.After the melting part 11 is melted, the fire-retarding mechanism 10 of the fire pipe 10, by means of a spring actuation or by means of a torque produced by the detonator holder, pushes the rain protection part 12 into the space 15 in which the melt part 11 was previously located and since the center of gravity of the rain protection part 12 is eccentric. 30, the rain protection section seeks, under the action of the centrifugal force, towards one side of this space 15 and thus forms with its flange 14 a locking device which acts as a rain protection, as shown in FIG. Ib. The rain protection part can also simply consist of a disc which may have an eccentrically located hole.

Hvis en regndråbe rammer regnsikringsdelen 12, forhindrer dens flange 14, at stødet fra regndråben overføres til slagspindelen 13.If a raindrop hits the rain protection portion 12, its flange 14 prevents the impact from the raindrop from being transferred to the impact stem 13.

Når brandrørets spids rammer en mere massiv genstand end en 35 3 144252 regndråbe, går regnsikringsdelen 12's flange 14 i stykker, og stødet overføres til slagspindelen 13, hvorved projektilet eksplode rer.When the tip of the fire pipe strikes a more massive object than a raindrop, the flange 14 of the rain protection member 12 breaks down and the shock is transferred to the impact stem 13, whereby the projectile explodes.

5 Ved den i fig. la og lb viste konstruktion hindres det på en simpel og pålidelig måde, at regndråber kan forårsage en uønsket eksplosion. Brandrørets følsomhed, bl.a. følsomheden over for regndråber af forskellig størrelse, kan på simpel måde varieres ved variation af flangen 14's tykkelse og/eller af diameteren af regnsikringsdelen 10 12's cylinder og/eller af egenskaberne for det materiale, af hvilket regnsikrings delen er fremstillet.5 In the embodiment of FIG. 1a and 1b, it is prevented in a simple and reliable way that raindrops can cause an unwanted explosion. The sensitivity of the fire pipe, including The sensitivity to raindrops of different sizes can be varied simply by varying the thickness of the flange 14 and / or the diameter of the rain protection part 10 12 cylinder and / or the properties of the material from which the rain protection part is made.

I fig. 2a og 2b er der vist en anden fordelagtig udførelsesform.In FIG. 2a and 2b, another advantageous embodiment is shown.

Ved denne udførelsesform skubber brandrøret 10's afsikringsmeka-15 nisme, efter at smeltedelen 11 er smeltet, en skivelignende regnsikringsdel 12' og et på undersiden af denne anbragt element, såsom en fjedrende ring eller centrifugaldele 16, mod smeltedelens rum 15, hvorved den fjedrende ring eller centrifugaldelene 16 kan trænge ind i en ringformet fordybning 17 udformet i boringen for 20 slagspindelen 13. Herved hindrer den fjedrende ring eller centrifugaldelene 16 regnsikrings delen 12r i at synke tilbage til fast berøring med slagspindelen 13, hvorved der frembringes en lignende regnsikring som ved den ovenfor beskrevne udførelsesform.In this embodiment, the fuse mechanism 15 of the fire tube 10, after the melting part 11 is melted, pushes a disc-like rainproofing part 12 'and an element located on the underside of this element, such as a resilient ring or centrifugal part 16, towards the fuse part 15, whereby the resilient ring or the centrifugal parts 16 can penetrate into an annular recess 17 formed in the bore of the impact shaft 13. This prevents the resilient ring or the centrifugal parts 16 from preventing the rain-retaining member 12r from sinking back into firm contact with the impact spindle 13, thereby producing a similar rain protection as the above. described embodiment.

25 Hvis en regndråbe rammer regnsikringsdelen 12', hindrer den fjedrende ring eller centrifugaldelene 16, at stødet overføres til slagspindelen 13, og derved er regndråbernes mulighed for at frembringe en uønsket eksplosion på pålidelig måde blevet elimineret. Når en mere massiv genstand end en regndråbe støder mod 30 brandrørets spids, giver regnsikringsdelen 12' efter, og stødet overføres til slagspindelen 13. Brandrørets følsomhed, bl.a. følsomheden over for regndråber af forskellig størrelse, kan varieres ved variation af tykkelsen af den skivelignende regnsikringsdel 12' og/eller af inderdiameteren for den fjedrende ring eller centrifugal-35 delene 16 og/eller af materialeegenskaberne.25 If a raindrop strikes the rain protection portion 12 ', the resilient ring or centrifugal members 16 prevent the shock from being transferred to the impact stem 13, thereby reliably eliminating the raindrops of producing an undesirable explosion. When a more massive object than a raindrop hits the tip of the fire pipe, the rain protection portion 12 'gives way and the shock is transferred to the impact stem 13. The sensitivity of the fire pipe, i.a. The sensitivity to raindrops of various sizes can be varied by varying the thickness of the disk-like rainproofing portion 12 'and / or the inner diameter of the resilient ring or centrifugal members 16 and / or the material properties.

Regnsikringen ifølge opfindelsen egner sig lige godt til såkaldte roterende projektiler som til ikke roterende projektiler. Den i fig.The rain protection according to the invention is equally suitable for so-called rotating projectiles as for non-rotating projectiles. The FIG.

Claims

144252 1a and 1b are suitable for rotating projectiles. This solution does not necessarily require an asymmetric rain protection part, since the rain protection can also be made with a symmetrical rain protection part. The FIG. 2a and 2b, a resilient ring shown in Fig. 5 is suitable for non-rotating projectiles, for example projectiles for grenade launchers, but this solution is of course also applicable in connection with rotating projectiles. The FIG. Figures 2a and 2b with centrifugal parts are intended for rotating projectiles. 10 Patent Claims.

A projectile shock pipe, said fire pipe spaced in front of its impact spindle (13) having a melting member (11) in the direction towards the impact spindle of the cover of a securing element (12, 14), characterized in that the securing element is one in a first positioned between the impact spindle (13) and the melting member (11) is arranged rain-retaining member (12, 14) which, when melting the melting member, is movable away from the impact spindle to another position against a stop and is adjustable in said second position.

Impact fire pipe according to claim 1, 25, characterized in that the rain protection part (12) is rotatable about an axis extending in the projectile's axis direction and formed eccentrically to be able to engage a groove.

Shock-fire pipe according to claim 1 or 2, 30, characterized in that the rain-protection part (12), in longitudinal section, has a T-shape with an eccentrically located T-leg.

Impact fire pipe according to any one of claims 1-3, characterized in that the fuse part is a plate-shaped body of substantially the same extent as the fuse part (11).