EP0457174B1 - Fume evacuator for gun barrels - Google Patents

Fume evacuator for gun barrels Download PDF

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Publication number
EP0457174B1
EP0457174B1 EP91107459A EP91107459A EP0457174B1 EP 0457174 B1 EP0457174 B1 EP 0457174B1 EP 91107459 A EP91107459 A EP 91107459A EP 91107459 A EP91107459 A EP 91107459A EP 0457174 B1 EP0457174 B1 EP 0457174B1
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EP
European Patent Office
Prior art keywords
bore
weapon barrel
smoke extractor
valve
weapon
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP91107459A
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German (de)
French (fr)
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EP0457174A1 (en
Inventor
Roland Bertiller
Hubert Schneider
Gerd Dieterle
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Mauser Werke Oberndorf GmbH
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Mauser Werke Oberndorf GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A13/00—Cooling or heating systems; Blowing-through of gun barrels; Ventilating systems
    • F41A13/06—Evacuating combustion gas from barrels
    • F41A13/08—Bore evacuators, i.e. chambers disposed around barrels for storing part of the combustion gas and subsequently injecting it into the barrel to provide suction

Definitions

  • the invention relates to a smoke extractor for gun barrels according to the preamble of claim 1.
  • These smoke evacuators are used to keep the combat area largely free of powder gases when shooting.
  • some of the high-tension gases enter the smoke extractor through the obliquely forward-directed holes in the weapon barrel.
  • the gas accumulated in the smoke evacuator flows out of the holes again at a relatively high speed and also entrains the gases located in the rear part of the gun barrel in the direction of the gun barrel muzzle.
  • US Pat. No. 3,122,055 discloses a smoke extractor which is arranged in a ring around the outer circumferential surface of the weapon barrel and is connected to the caliber bore of the weapon barrel via a radial bore. This hole can be opened by a slide that moves against the force of a helical compression spring.
  • the blow-out bore is located in the direction of the weapon barrel opening in front of the valve bore mentioned.
  • the arrangement of the valve and blow-out holes prevent the build-up of a gas flow in a long weapon barrel or barrel system.
  • the object of the invention is to provide a smoke evacuator for gun barrels of the type mentioned, which, despite its simple design, also ensures good functioning in both large and small sizes or gun barrel calibers.
  • the peculiarity of this new smoke extractor for gun barrels is the good function in both large and very small sizes. This makes it possible, for example, to attach smoke extractors to gun barrels that are used as insertion tubes for weapon systems.
  • the function of the smoke extractor is determined by the check valves, which control the inlet speed, the pressure and thus the blow-out time of the gas.
  • a particular advantage of these check valves attached to the circumference of the weapon barrel inside the smoke evacuation device can be seen in their design and in the arrangement of the valve bores.
  • the check valves consist of layered leaf springs which are raised by the shot gases and which immediately close again as soon as the shot gas flow stops due to their inherent tension. The closing speed of this type of valve is very high. This has the advantage that a desired, long gas discharge time is achieved.
  • the Y-shaped valve bores divide the gas flow flowing from the weapon barrel into the smoke extractor, so that the flow velocity of the gas is reduced.
  • valves for smoke evacuators according to the invention remain maintenance-free over long series of wefts and are very durable. In addition, only a small overall height is required for this type of check valve.
  • a smoke extractor 8 in the form of a hollow cylinder is preferably arranged in the central region thereof.
  • the smoke extractor 8 is connected at its front and rear end region to the gun barrel 7 in a gas-tight manner by sealing rings 10 and 11.
  • the outer circumferential surface of the weapon barrel 7 in the area between the two sealing rings 10 and 11 is recessed in a ring.
  • the hollow cylinder of the smoke extractor 8 can also be formed radially outward in the area between the two sealing rings 10 and 11 in order to create a sufficiently large smoke extractor space 4.
  • the smoke extractor 8 can also be screwed onto the weapon barrel with a front threaded nut 12 and a locking ring (not shown here) in the present case.
  • the smoke extractor 8 can be secured against rotation at the rear end facing the closure by a wedge, also not shown. Any water that may accumulate in the smoke extractor can be drained off by a drain screw 13 in the rear area.
  • a blow-out bore 3 extends from the caliber bore 5 of the weapon barrel 7, which is oriented obliquely to the rear end of the weapon barrel at a flat angle to the weapon barrel longitudinal axis 9 and opens into the smoke evacuation chamber 4. Distributed over the circumference of the weapon barrel 7, a plurality of such blow-out bores 3 can advantageously be provided, which are advantageously arranged at regular intervals from one another.
  • the blow-out bore 3 opens out in the rear area of the smoke extractor chamber 4 in such a way that good outflow of the gases collected in the smoke extractor 8 is possible without interference.
  • Two side channels 2.2 branch off from the lower central channel 2.1, which are oriented in opposite directions by 180 degrees and open into the smoke evacuation chamber 4.
  • the two inclined channels 2.2 are each located at a flat angle to the longitudinal axis 9 of the weapon barrel 7.
  • the two inlet openings 14 of a valve bore 2 are closed by a check valve 6, which is formed from a spring assembly made of layered leaf springs 6.1.
  • the individual leaf springs 6.1 can be of different sizes, and of course they can equally well be of the same size.
  • the entire spring assembly is held by a central screw 15, the longitudinal axis 16 of which passes through the longitudinal axis 17 of the lower channel 2.1 of the valve bore 2.
  • a washer 18 is inserted between the screw head and the uppermost leaf spring.
  • the screw 15 is screwed into a threaded bore in the jacket of the weapon barrel 7.
  • valve bores 2 with check valves 6 distributed over the circumference of the weapon barrel 7 are of course also possible within the meaning of the invention.
  • two lower inlet channels 2.1 which are always correspondingly assigned, can be provided for all valve bores.
  • these inlet channels 2.1 it is also possible to provide a circumferential annular groove, from which the oblique channels 2.2 then proceed.
  • FIG. 2 shows the state of the closed check valve 2 with a smoke evacuation chamber 4 completely filled with gases.
  • the compressed gases in the smoke evacuation chamber 4 now flow into the weapon barrel 7 through the blow-out holes 3, which run obliquely in the direction of the mouth of the weapon barrel.
  • the weapon breech not shown here, opens, so that a flow arises from the weapon breech to the weapon barrel muzzle and the gases in the rear part of the weapon barrel 7 are carried forward.
  • This operating principle keeps the battle area of a battle tank or a weapon turret free of co-concentrations.
  • this invention has the advantages of a function which is significantly improved over the prior art. There is no longer any health risk and a longer period of use and therefore more training is possible. In addition, the smoke extractor is almost maintenance-free thanks to the special design of the check valve 6.
  • the smoke extractor 8 which is designed as a hollow cylinder, can be arranged both eccentrically and centrally around the weapon barrel 7.
  • a smoke extractor 8 having a circular cross section other cross sections, such as oval or polygonal cross sections, are also possible within the meaning of the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)

Description

Die Erfindung betrifft einen Rauchabsauger für Waffenrohre nach dem Oberbegriff des Patentanspruches 1.The invention relates to a smoke extractor for gun barrels according to the preamble of claim 1.

Aus der Gerätbeschreibung "Turm und Bewaffnung Kampfpanzer Leopard A4", Juni 1974, Seiten 55 und 56, geht ein Rauchabsauger einer ähnlichen Art hervor.A smoke evacuator of a similar type emerges from the device description "Turret and armament battle tank Leopard A4", June 1974, pages 55 and 56.

Diese Rauchabsauger dienen dazu, den Kampfraum beim Schießen weitgehend von Pulvergasen freizuhalten. Dabei tritt beim Schuß ein Teil der hochgespannten Gase durch die schräg nach vorn gerichteten Bohrungen im Waffenrohr in den Rauchabsauger ein. Wenn ein Geschoß das Waffenrohr verlassen hat, strömt das im Rauchabsauger angesammelte Gas wieder mit relativ hoher Geschwindigkeit aus den Bohrungen aus und reißt auch die im hinteren Teil des Waffenrohres befindlichen Gase in Richtung zur Waffenrohrmündung mit.These smoke evacuators are used to keep the combat area largely free of powder gases when shooting. When the shot is fired, some of the high-tension gases enter the smoke extractor through the obliquely forward-directed holes in the weapon barrel. When a projectile has left the gun barrel, the gas accumulated in the smoke evacuator flows out of the holes again at a relatively high speed and also entrains the gases located in the rear part of the gun barrel in the direction of the gun barrel muzzle.

Wie sich jedoch in der Praxis gezeigt hat, hat die Funktion dieses bekannten Rauchabsaugers insbesondere bei Waffenrohren mit relativ kleiner Kaliberbohrung nicht ausgereicht, um den CO-Wert im Kampfraum so stark zu reduzieren, daß Schäden für die Personen im Kampfraum ausgeschlossen werden können.However, as has been shown in practice, the function of this known smoke extractor, especially in the case of weapon tubes with a relatively small bore, was not sufficient to reduce the CO value in the combat area so much that damage to the people in the combat area can be ruled out.

Durch die US-A 2,807,986 ist ein gattungsgemäßer Rauchabsauger mit ringförmig angeordneten Ventilbohrungen und ringförmig vorgesehenen Ausblasbohrungen für die Rauchgase in einem Waffenrohr bekannt. Dabei ist die Ventilbohrung in Richtung zur Waffenrohrmündung hinter der Ausblasbohrung angebracht und besteht aus nur einer, schräg ausgerichteten Bohrung. Mit der getroffenen Anordnung und Ausgestaltung der Ventilbohrung erscheint eine besonders gute Füllung des Rauchabsaugers und somit gleichzeitig eine gute und schnelle Entleerung der Waffenrohrbohrung nicht gewährleistet zu sein.From US-A 2,807,986 a generic smoke extractor with annularly arranged valve bores and annularly provided blow-out bores for the smoke gases in a weapon barrel is known. The valve bore is made behind the blow-out bore in the direction of the weapon barrel muzzle and consists of only one, obliquely aligned bore. With the arrangement and design of the valve bore made, a particularly good filling of the smoke extractor and thus at the same time a good and rapid emptying of the weapon barrel bore do not appear to be guaranteed.

Die US-A 3,122,055 offenbart einen Rauchabsauger, der ringförmig um die äußere Mantelfläche des Waffenrohres angeordnet ist und über eine radiale Bohrung mit der Kaliberbohrung des Waffenrohres in Verbindung steht. Diese Bohrung ist durch einen gegen die Kraft einer Schraubendruckfeder beweglichen Schieber zu öffnen. Auch hier befindet sich die Ausblasbohrung in Richtung zur Waffenrohrmündung vor der genannten Ventilbohrung. Die Anordnung der Ventil- und Ausblasbohrung verhindern den Aufbau einer Gasströmung in einem langen Waffenrohr oder Einsteckrohrsystem. Hinzu kommt als weiterer Nachteil, daß nach dem gesamten Aufbau der Rauchabsauger ausschließlich für große Kaliber ausgelegt ist.US Pat. No. 3,122,055 discloses a smoke extractor which is arranged in a ring around the outer circumferential surface of the weapon barrel and is connected to the caliber bore of the weapon barrel via a radial bore. This hole can be opened by a slide that moves against the force of a helical compression spring. Here, too, the blow-out bore is located in the direction of the weapon barrel opening in front of the valve bore mentioned. The arrangement of the valve and blow-out holes prevent the build-up of a gas flow in a long weapon barrel or barrel system. In addition, there is a further disadvantage that, after the entire construction of the smoke extractor, it is designed exclusively for large calibers.

Eine weitere Variante eines Rauchabsaugers zeigt die US-A 3,377,918 mit wiederum einer Ventilbohrung und einer Ausblasbohrung, die von der Kaliberbohrung des Waffenrohres in den ringförmig am Außenmantel des Waffenrohres angeordneten Rauchabsaugers einmünden.Another variant of a smoke extractor is shown in US-A 3,377,918, again with a valve bore and a blow-out bore, which open out from the caliber bore of the weapon barrel into the smoke extractor arranged in a ring on the outer jacket of the weapon barrel.

Aufgabe der Erfindung ist es einen Rauchabsauger für Waffenrohre der eingangs genannten Art zu schaffen, der trotz einfacher Bauart auch eine gute Funktion bei großen wie bei kleinen Baugrößen bzw. Waffenrohrkaliber gewährleisten.The object of the invention is to provide a smoke evacuator for gun barrels of the type mentioned, which, despite its simple design, also ensures good functioning in both large and small sizes or gun barrel calibers.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Patentanspruches 1 gelöst.According to the invention, this object is achieved by the features of patent claim 1.

Eine vorteilhafte Ausgestaltung und Weiterbildung der Erfindung ist dem Unteranspruch zu entnehmen.An advantageous embodiment and development of the invention can be found in the subclaim.

Die Besonderheit dieses neuen Rauchabsaugers für Waffenrohre ist die gute Funktion sowohl bei großen als auch bei sehr kleinen Baugrößen. Dadurch ist es möglich, beispielsweise Rauchabsauger auch an Waffenrohren anzubringen, die als Einsteckrohre für Waffensysteme verwendet werden. Die Funktion des Rauchabsaugers wird durch die Rückschlagventile bestimmt, welche die Einlaßgeschwindigkeit, den Druck und damit die Ausblaszeit des Gases steuern. Von besonderem Vorteil dieser am Umfang des Waffenrohres innterhalb des Rauchabsaugers angebrachten Rückschlagventile sind in deren Bauart und in der Anordnung der Ventilbohrungen zu sehen. Die Rückschlagventile bestehen gemäß den Patentansprüchen aus geschichteten Blattfedern, die durch die Schußgase angehoben werden und sich durch ihre Eigenspannung sofort wieder schließen, sobald der Schußgasstrom abbricht. Die Schließgeschwindigkeit dieser Ventilbauart ist sehr hoch. Dies hat den Vorteil, daß dadurch eine erwünschte, lange Auslaszeit der Gase erzielt wird. Durch die Y-förmige Ventilbohrungen teilt sich der vom Waffenrohr in den Rauchabsauger strömende Gasstrom, so daß die Strömungsgeschwindigkeit des Gases verringert wird.The peculiarity of this new smoke extractor for gun barrels is the good function in both large and very small sizes. This makes it possible, for example, to attach smoke extractors to gun barrels that are used as insertion tubes for weapon systems. The function of the smoke extractor is determined by the check valves, which control the inlet speed, the pressure and thus the blow-out time of the gas. A particular advantage of these check valves attached to the circumference of the weapon barrel inside the smoke evacuation device can be seen in their design and in the arrangement of the valve bores. According to the patent claims, the check valves consist of layered leaf springs which are raised by the shot gases and which immediately close again as soon as the shot gas flow stops due to their inherent tension. The closing speed of this type of valve is very high. This has the advantage that a desired, long gas discharge time is achieved. The Y-shaped valve bores divide the gas flow flowing from the weapon barrel into the smoke extractor, so that the flow velocity of the gas is reduced.

Durch den flachen Austrittswinkel der Eintrittsöffnungen in den Rauchabsauger ist nur ein geringer Öffnungswinkel der Blattfederventile notwendig.Due to the flat exit angle of the inlet openings in the smoke extractor, only a small opening angle of the leaf spring valves is necessary.

Diese erfindungsgemäßen Ventile für Rauchabsauger bleiben über lange Schußserien wartungsfrei und sind sehr langlebig. Außerdem wird für diese Bauart der Rückschlagventile eine nur geringe Bauhöhe benötigt.These valves for smoke evacuators according to the invention remain maintenance-free over long series of wefts and are very durable. In addition, only a small overall height is required for this type of check valve.

In der Zeichnung ist ein Beispiel der Erfindung dargestellt. Es zeigen:

Figur 1
einen Rauchabsauger eines Waffenrohres im Schnitt mit geöffnetem Rückschlagventil,
Figur 2
den Rauchabsauger gemäß Figur 1 im Schnitt, jedoch mit geschlossenem Rückschlagventil.
An example of the invention is shown in the drawing. Show it:
Figure 1
a smoke extractor of a gun barrel in section with the check valve open,
Figure 2
the smoke extractor according to Figure 1 in section, but with the check valve closed.

Um ein Waffenrohr 7 ist vorzugsweise in dessen mittleren Bereich ein Rauchabsauger 8 in Form eines Hohlzylinders angeordnet. Der Rauchabsauger 8 ist an seinem vorderen und hinteren Endbereich mit dem Waffenrohr 7 durch Dichtringe 10 und 11 mit dem Waffenrohr 7 gasdicht verbunden. Um einen Rauchabsaugerraum 4 zu erhalten, ist in dem Beispiel nach Figur 1 die äußere Mantelfläche des Waffenrohres 7 im Bereich zwischen den beiden Dichtringen 10 und 11 ringförmig ausgenommen. Darüberhinaus kann auch der Hohlzylinder des Rauchabsaugers 8 im Bereich zwischen den beiden Dichtringen 10 und 11 radial nach außen ausgeformt sein, um einen ausreichend großen Rauchabsaugerraum 4 zu schaffen.Around a weapon barrel 7, a smoke extractor 8 in the form of a hollow cylinder is preferably arranged in the central region thereof. The smoke extractor 8 is connected at its front and rear end region to the gun barrel 7 in a gas-tight manner by sealing rings 10 and 11. In order to obtain a smoke evacuation chamber 4, in the example according to FIG. 1, the outer circumferential surface of the weapon barrel 7 in the area between the two sealing rings 10 and 11 is recessed in a ring. In addition, the hollow cylinder of the smoke extractor 8 can also be formed radially outward in the area between the two sealing rings 10 and 11 in order to create a sufficiently large smoke extractor space 4.

Wie bei den bekannten Rauchabsaugern üblich, kann auch im vorliegenden Fall der Rauchabsauger 8 mit einer vorderen Gewindemutter 12 und einem hier nicht gezeigtem Sicherungsring auf dem Waffenrohr festgeschraubt werden.As is usual with the known smoke extractors, the smoke extractor 8 can also be screwed onto the weapon barrel with a front threaded nut 12 and a locking ring (not shown here) in the present case.

Dazu kann der Rauchabsauger 8 am hinteren, dem Verschluß zugewandten Ende durch einen ebenfalls nicht gezeigten Keil gegen Verdrehen gesichert sein. Ein eventuell sich in dem Rauchabsauger ansammelndes Wasser kann durch eine Ablasschraube 13 im hinteren Bereich abgelassen werden.For this purpose, the smoke extractor 8 can be secured against rotation at the rear end facing the closure by a wedge, also not shown. Any water that may accumulate in the smoke extractor can be drained off by a drain screw 13 in the rear area.

Von der Kaliberbohrung 5 des Waffenrohres 7 geht eine Ausblasbohrung 3 aus, welche unter einem zur Waffenrohrlängsachse 9 verlaufenden flachen Winkel schräg zum rückwärtigen Ende des Waffenrohres ausgerichtet ist und den Rauchabsaugerraum 4 einmündet. Über den Umfang des Waffenrohr 7 verteilt können zweckmäßigerweise mehrere solcher Ausblasbohrungen 3 vorgesehen sein, die vorteilhafterweise im regelmäßigen Abstand zueinander angeordnet sind. Die Ausblasbohrung 3 mündet derart im hinteren Bereich des Rauchabsaugerraums 4 ein, daß gutes Ausströmen der in dem Rauchabsauger 8 gesammelten Gase ohne Störungen möglich ist. In Richtung zur Waffenrohrmündung vor der Ausblasbohrung 3 befindet sich eine Ventilbohrung 2 in einer Y-Bauform. Von dem unteren zentralen Kanal 2.1 zweigen zwei Seitenkanäle 2.2 ab, die um 180 Grad zueinander gegenläufig ausgerichtet sind und in dem Rauchabsaugerraum 4 einmünden. Die beiden schräg verlaufenden Kanäle 2.2 befinden sich jeweils unter einem flachen Winkel zur Längsachse 9 des Waffenrohres 7. Die beiden Eintrittsöffnungen 14 einer Ventilbohrung 2 werden durch ein Rückschlagventil 6 verschlossen, welches aus einem Federpaket aus geschichteten Blattfedern 6.1 gebildet ist. Die einzelnen Blattfedern 6.1 können entsprechend der Figur 1 von unterschiedlicher Größe sein, sie können natürlich ebenso gut auch von gleicher Größe ausgebildet sein. Das gesamte Federpaket wird durch eine zentrale Schraube 15 gehalten, deren Längsachse 16 durch die Längsachse 17 des unteren Kanals 2.1 der Ventilbohrung 2 geht. Zwischen dem Schraubenkopf und der obersten Blattfeder ist eine Scheibe 18 zwischengefügt.A blow-out bore 3 extends from the caliber bore 5 of the weapon barrel 7, which is oriented obliquely to the rear end of the weapon barrel at a flat angle to the weapon barrel longitudinal axis 9 and opens into the smoke evacuation chamber 4. Distributed over the circumference of the weapon barrel 7, a plurality of such blow-out bores 3 can advantageously be provided, which are advantageously arranged at regular intervals from one another. The blow-out bore 3 opens out in the rear area of the smoke extractor chamber 4 in such a way that good outflow of the gases collected in the smoke extractor 8 is possible without interference. In the direction of the weapon barrel mouth in front of the blow-out bore 3, there is a valve bore 2 in a Y design. Two side channels 2.2 branch off from the lower central channel 2.1, which are oriented in opposite directions by 180 degrees and open into the smoke evacuation chamber 4. The two inclined channels 2.2 are each located at a flat angle to the longitudinal axis 9 of the weapon barrel 7. The two inlet openings 14 of a valve bore 2 are closed by a check valve 6, which is formed from a spring assembly made of layered leaf springs 6.1. According to FIG. 1, the individual leaf springs 6.1 can be of different sizes, and of course they can equally well be of the same size. The entire spring assembly is held by a central screw 15, the longitudinal axis 16 of which passes through the longitudinal axis 17 of the lower channel 2.1 of the valve bore 2. A washer 18 is inserted between the screw head and the uppermost leaf spring.

Die Schraube 15 wird in eine Gewindebohrung im Mantel des Waffenrohres 7 verschraubt.The screw 15 is screwed into a threaded bore in the jacket of the weapon barrel 7.

Anstelle der in Figur 1 dargestellten einzigen Ventilbohrung 2 sind selbstverständlich im Sinne der Erfindung auch mehrere auf dem Umfang des Waffenrohres 7 verteilte Ventilbohrungen 2 mit Rückschlagventilen 6 möglich. Dabei können zu allen Ventilbohrungen zwei immer entsprechend zugeordnete untere Eintrittskanäle 2.1 vorgesehen sein. Anstelle dieser Eintrittskanäle 2.1 ist es auch möglich, eine umlaufende Ringnut vorzusehen, von der sodann die schräg verlaufenden Kanäle 2.2 ausgehen.Instead of the single valve bore 2 shown in FIG. 1, several valve bores 2 with check valves 6 distributed over the circumference of the weapon barrel 7 are of course also possible within the meaning of the invention. In this case, two lower inlet channels 2.1, which are always correspondingly assigned, can be provided for all valve bores. Instead of these inlet channels 2.1, it is also possible to provide a circumferential annular groove, from which the oblique channels 2.2 then proceed.

Bei einem Abfeuern eines Geschosses 1 treten die mit hohem Druck hinter dem Geschoß 1 herströmenden Gase 19 durch die Y-förmigen Ventilbohrungen 2 und durch die Ausblasbohrungen 3 in den ringförmig gestalteten Rauchabsaugerraum 4 ein. Aufgrund des hohen Gasdruckes haben sich die Rückschlagventile von den Eintrittsöffnungen 14 der Ventilbohrungen leicht abgehoben. Nachdem das Geschoß 1 das Waffenrohr 7 verlassen hat und der Gasdruck im Waffenrohr 7 abfällt, schließen sich die Rückschlagventile 6. Dabei ist zu bemerken, daß die Schließgeschwindigkeit der Rückschlagventile aufgrund der besonderen Bauart aus geschichteten Blattfedern sehr hoch ist. Dies bedeutet nun, daß trotz der vielen Einlaßbohrungen in den Rauchabsaugerraum 4 nur ein relativ langsames Ausblasen des Gases durch die Ausblasbohrungen 3 möglich ist. Diese lange Ausblaszeit ist grundsätzlich gewünscht, damit sämtliche sich noch im Waffenrohr und vor allen Dingen im Bereich des hinteren Verschlusses befindenden Gase bei dem Ausblasen mitgerissen werden können.When a projectile 1 is fired, the gases 19 flowing behind the projectile 1 with high pressure enter through the Y-shaped valve bores 2 and through the blowout bores 3 into the annularly shaped smoke evacuation chamber 4. Due to the high gas pressure, the check valves have lifted slightly from the inlet openings 14 of the valve bores. After the projectile 1 has left the gun barrel 7 and the gas pressure in the gun barrel 7 drops, the check valves 6 close. It should be noted that the closing speed of the check valves is very high due to the special design of layered leaf springs. This means that despite the many inlet bores in the smoke extraction chamber 4, only a relatively slow blowing out of the gas through the blowing bores 3 is possible. This long blow-out time is generally desired so that all gases that are still in the gun barrel and, above all, in the area of the rear breech can be carried away with the blow-out.

Figur 2 zeigt den Zustand des geschlossenen Rückschlagventiles 2 mit einem vollständig mit Gasen angefüllten Rauchabsaugerraum 4.FIG. 2 shows the state of the closed check valve 2 with a smoke evacuation chamber 4 completely filled with gases.

Die komprimierten Gase in dem Rauchabsaugerraum 4 strömen nun durch die in Richtung der Mündung des Waffenrohres schräg verlaufenden Ausblasbohrungen 3 in das Waffenrohr 7 ein. Im Zeitraum des Ausströmens des Gases 19 aus dem Rauchabsaugerraum 4 öffnet sich der hier nicht gezeigte Waffenverschluß, sodaß eine Strömung vom Waffenverschluß zur Waffenrohrmündung entsteht und die Gase im hinteren Teil des Waffenrohres 7 mit nach vorne reißt. Durch dieses Funktionsprinzip wird der Kampfraum eines Kampfpanzers oder eines Waffenturmes von Co-Konzentrationen freigehalten.The compressed gases in the smoke evacuation chamber 4 now flow into the weapon barrel 7 through the blow-out holes 3, which run obliquely in the direction of the mouth of the weapon barrel. In the period of the gas 19 flowing out of the smoke evacuation chamber 4, the weapon breech, not shown here, opens, so that a flow arises from the weapon breech to the weapon barrel muzzle and the gases in the rear part of the weapon barrel 7 are carried forward. This operating principle keeps the battle area of a battle tank or a weapon turret free of co-concentrations.

Diese Erfindung hat insgesamt die Vorteile einer gegenüber dem Stand der Technik wesentlich verbesserten Funktion. Dazu besteht kein Gesundheitsrisiko mehr und es ist eine längere Einsatzzeit und dadurch mehr Training möglich. Überdies ist der Rauchabsauger nahezu wartungsfrei durch die besondere Bauart des Rückschlagventils 6.Overall, this invention has the advantages of a function which is significantly improved over the prior art. There is no longer any health risk and a longer period of use and therefore more training is possible. In addition, the smoke extractor is almost maintenance-free thanks to the special design of the check valve 6.

Der als Hohlzylinder ausgebildete Rauchabsauger 8 kann sowohl exzentrisch als auch zentrisch um das Waffenrohr 7 angeordnet sein. Statt eines im Querschnitt kreisringförmigen Rauchabsaugers 8 sind im Sinne der Erfindung auch andere Querschnitte, wie beispielsweise ovale oder mehreckige Querschnitte möglich.The smoke extractor 8, which is designed as a hollow cylinder, can be arranged both eccentrically and centrally around the weapon barrel 7. Instead of a smoke extractor 8 having a circular cross section, other cross sections, such as oval or polygonal cross sections, are also possible within the meaning of the invention.

Claims (2)

  1. Smoke extractor (8) for weapon barrels (7), which is substantially formed by a hollow cylinder arranged around the weapon barrel (7) and which is connected to the calibre bore (5) of the weapon barrel (7) by means of at least one discharge bore (3), running obliquely with respect to mouth of the weapon barrel, and at least one valve bore (2) which is closable by means of a non-return valve (6) arranged in the smoke extractor (8) and comprising layered leaf springs (6.1) which are secured in the smoke extractor space by means of screws (15), characterized in that, as seen in the direction of the mouth of the weapon barrel, the valve bore (2) is arranged upstream of the discharge bore (3) and, starting from an annular groove (2.1) or inlet channels in the calibre bore (5), is constructed in the shape of a Y with two oblique inlet openings (14) disposed in opposite directions at a shallow angle with respect to the weapon barrel longitudinal axis (9), the screw longitudinal axis (16) running through the longitudinal axis (17) of the annular groove (2.1) of the valve bore (2).
  2. Smoke extractor according to Claim 1, characterized in that there are provided, in each case distributed annularly over the periphery of the weapon barrel (7), a plurality of valve bores (2) and/or discharge bores (3) arranged at regular intervals from one another.
EP91107459A 1990-05-17 1991-05-08 Fume evacuator for gun barrels Expired - Lifetime EP0457174B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4015822 1990-05-17
DE4015822A DE4015822A1 (en) 1990-05-17 1990-05-17 SMOKE EXTRACTOR FOR GUN PIPES

Publications (2)

Publication Number Publication Date
EP0457174A1 EP0457174A1 (en) 1991-11-21
EP0457174B1 true EP0457174B1 (en) 1994-03-09

Family

ID=6406583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107459A Expired - Lifetime EP0457174B1 (en) 1990-05-17 1991-05-08 Fume evacuator for gun barrels

Country Status (8)

Country Link
US (1) US5109748A (en)
EP (1) EP0457174B1 (en)
JP (1) JP3115351B2 (en)
AU (1) AU636025B2 (en)
CA (1) CA2042205C (en)
DE (2) DE4015822A1 (en)
ES (1) ES2051538T3 (en)
IL (1) IL98168A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6543174B2 (en) 1997-06-03 2003-04-08 Metal Storm Limited Barrel assembly with over-pressure relief
US6460446B1 (en) * 1999-09-03 2002-10-08 The United States Of America As Represented By The Secretary Of The Army Sonic rarefaction wave recoilless gun system
ES2286639T3 (en) * 2003-07-02 2007-12-01 Denel (Pty) Ltd SMOKE EXTRACTOR.
HU227997B1 (en) * 2005-03-16 2012-08-28 Istvan Attila Levai Gas-expansion chamber for fire-arm having longer barrel and increased propellant charge
US8567300B1 (en) * 2010-11-22 2013-10-29 The United States Of America As Represented By The Secretary Of The Army Time-delayed gun bore evacuator

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118342A (en) * 1964-01-21 Bore evacuator for cannons
US1334507A (en) * 1919-01-20 1920-03-23 Harry L Shartle Valve construction for pumps
US2791940A (en) * 1948-04-28 1957-05-14 Sumpter M Speake Device for purging guns
US2807986A (en) * 1953-07-03 1957-10-01 Wellington R Howard Bore evacuator for gun barrels
US2766661A (en) * 1953-10-09 1956-10-16 Margulis Waldo Bore evacuator with elastic action
US3122055A (en) * 1962-06-06 1964-02-25 Sr Donald M Roeck Bore evacuator for artillery type guns
US3377918A (en) * 1966-04-21 1968-04-16 Army Usa Split ring valve for bore evacuator
US3715955A (en) * 1970-02-12 1973-02-13 Maremont Corp Machine gun gas actuating and evacuation system
US4319452A (en) * 1978-09-12 1982-03-16 Nissan Motor Company, Limited Secondary air supply device
US4724937A (en) * 1984-09-04 1988-02-16 General Motors Corporation Hydraulic damper for vehicles with variable deflected disk piston valving

Also Published As

Publication number Publication date
JPH04227491A (en) 1992-08-17
US5109748A (en) 1992-05-05
AU7529291A (en) 1991-11-21
IL98168A (en) 1994-06-24
DE4015822A1 (en) 1991-11-21
CA2042205C (en) 1995-12-12
JP3115351B2 (en) 2000-12-04
EP0457174A1 (en) 1991-11-21
ES2051538T3 (en) 1994-06-16
AU636025B2 (en) 1993-04-08
CA2042205A1 (en) 1991-11-18
DE59101134D1 (en) 1994-04-14
IL98168A0 (en) 1992-06-21

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