EP0602470B1 - Method for interrupting a detonating cord in case of an unwanted detonation and device for putting this method into practice - Google Patents

Method for interrupting a detonating cord in case of an unwanted detonation and device for putting this method into practice Download PDF

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Publication number
EP0602470B1
EP0602470B1 EP19930119478 EP93119478A EP0602470B1 EP 0602470 B1 EP0602470 B1 EP 0602470B1 EP 19930119478 EP19930119478 EP 19930119478 EP 93119478 A EP93119478 A EP 93119478A EP 0602470 B1 EP0602470 B1 EP 0602470B1
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EP
European Patent Office
Prior art keywords
detonation
detonating cord
hole
cord
loop
Prior art date
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
Application number
EP19930119478
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German (de)
French (fr)
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EP0602470A3 (en
EP0602470A2 (en
Inventor
Thomas Dipl.-Chem. Mann
Reimund Dipl.-Chem. Göder
Siegfried Ing. Hering
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SPRENGSTOFFWERK GNASCHWITZ GmbH
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SPRENGSTOFFWERK GNASCHWITZ GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/042—Logic explosive circuits, e.g. with explosive diodes
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C5/00—Fuses, e.g. fuse cords
    • C06C5/06—Fuse igniting means; Fuse connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/14—Explosion or fire protection arrangements on packages or ammunition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/30—Containers for detonators or fuzes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D5/00—Safety arrangements
    • F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless

Definitions

  • the invention relates to a method for interrupting a detonating cord in the event that an undesired detonation runs through the detonating cord, the passage of this detonation triggering a separating element at a defined detonation point, a device for carrying out this method and the use of this device.
  • Detonating cords consist of an explosive core and a jacket surrounding it.
  • the explosive for example nitropenta
  • the jacket is made of metal.
  • the US-PS 31 25 024 describes an explosive cord with a fabric jacket.
  • the free-flowing explosive is poured through a funnel as a free-flowing jet into the casing spun around the jet.
  • the material used for spinning is, for example, polypropylene tapes around which polypropylene cords are spun for further strengthening.
  • a detonating cord produced in this way is wound onto a storage drum after completion of the spinning and is then or immediately transported from the spinning room to another treatment room for further processing.
  • Another major disadvantage of the known device is its spatial length. Where little space is available, the device cannot be used because the loop is always added to the block.
  • the object is achieved according to the invention with a method in which the passage of this detonation at a defined detonation point triggers a movable mechanical separating element which certainly cuts off a section of the detonating cord that has not yet been detected by the detonation at an interface, so that this section of the Detonation can no longer be achieved, the length of the detonating cord part between this defined detonation detection point and this interface being dimensioned such that the detonation can only reach this interface when the mechanical separating element has cut off the section of the detonating cord.
  • the great operational safety of the device is that the detonation itself ensures the mechanical severing of the part of the detonating cord that has not yet been detonated. This mechanical severing and the shear effect associated with the mechanical separator are reliable.
  • An apparatus for carrying out the method has a block made of highly tear-resistant material, which has two openings, which are arranged at a detonation-proof distance from one another, through which a detonating cord is guided in a loop, the openings being connected to the inside of the block by means of a connecting bore, and is thereby characterized in that a firing pin acting as a separating element is slidably mounted in this connecting bore; and the loop length from the first breakthrough to the second breakthrough is so long that the firing pin, if it is moved by a detonation in the detonating cord in the first breakthrough in the direction of the second breakthrough, breaks through and detaches the undetected detonating cord in the second breakthrough before the detonation occurs on this second breakthrough.
  • the detonation interrupter and the firing pin are made of steel. These parts made of steel have proven to be particularly functional.
  • At least the steel of the firing pin is hardened. The risk of deformation due to the detonation is thus reduced, and the firing pin remains with great certainty in its guide opening.
  • the firing pin is provided with a cutting edge on its severing side.
  • the cutting edge facilitates cutting.
  • the loop is guided over a loop deflection roller and the loop length from the first opening to the second opening is so long that the firing pin has the second opening with the still undetonated section of the detonating cord after cutting through the Detonating cord has already completed when the detonation occurs on this second breakthrough.
  • the loop is thus the compensating element, which gives the firing pin the time required to cut through the undetonated section of the detonating cord in good time.
  • the detonating cord can be fed from the production machine to the first of the breakthroughs arranged at a detonation-safe distance, upon which the detonation first occurs, and that the detonating cord passing through the second breakthrough after leaving this second breakthrough the supply can be supplied on a storage drum or for further processing.
  • the device can be used in a variety of ways, it is particularly suitable between the manufacturing, for example the spinning machine and the further processing point, which can either be the immediately adjacent storage drum or a further processing point in an adjacent production area.
  • FIG. 1 and 2 show the device for interrupting an explosive cord in the event of an undesired detonation.
  • the core 3 of this device is referred to below as a detonation interrupter.
  • This detonation interrupter 3 consists of a steel roller, the material of which may have been hardened.
  • two openings extend in the form of a first bore 6 and a second bore 7.
  • the mutual distance A of the bores 6 and 7 is dimensioned such that the detonation in one of the bores 6 in the other bore 7 is none Can initiate detonation.
  • an explosive cord 8 is inserted into the first bore 6 from the peripheral side 3a of the detonation interrupter 3.
  • the detonating cord 8 runs through the bore 6 with an explosive cord section 8a in the direction of the arrow B. Via an indicated loop 8b, the detonating cord with the section 8c in the direction of the arrow C in the opposite direction again becomes the detonation interrupter 3 and from the side 3b through its second bore 7 led. After this Leaving the detonation interrupter 3, the detonating cord is then carried on to a storage drum and / or a further processing point. The continuation of the detonating cord 8 to the storage drum 16 is explained with reference to FIGS. 4 and 5.
  • the bores 6 and 7 can run parallel, but can also be inclined towards one another, as can be seen from FIG.
  • the holes 6 and 7 do not have to run in the plane shown in FIG. 1; they can also be adjusted relative to one another about axis 5. It is only important that the mutual distance A is chosen so large that no mutual detonation initiation is possible.
  • a further connecting bore 9 is provided transversely to the bores 6 and 7, which connects the bores 6 and 7.
  • the connecting bore 9 begins on the outside and leads through the region of the second bore 7 to the first bore 6.
  • the connecting bore 9 is closed from the outside by means of a screw plug 10.
  • a firing pin 11 is located in the connecting hole 9 between the holes 6 and 7.
  • the firing pin 11 is freely displaceable in the connecting hole 9; it is preferably made of hardened steel and is provided on its side facing the second bore 7 with a cutting edge 11a.
  • the detonating cord 8 leaves a spinning machine (not shown) vertically from above; it runs, as shown in FIG. 3, several times looped via a trigger wheel 12 into a deflection roller 13 and from there into the first bore 6 of the detonation interrupter 3 Loop 8b is formed with the aid of a deflecting roller 14. From the deflecting roller 14, the detonating cord section 8c is then returned to the second bore 7 and passed through it. 4 shows how a further deflection roller 15 leads the detonating cord 8 to a safety catch 17, not shown, with two guide rollers 18 and a transfer roller 19.
  • the supply drum 16 exerts a tensile force on the detonating cord 8, so that the detonating cord 8 is pulled by the spinning machine through the device and thus through the detonation interrupter 3.
  • the detonator there is also a tensile stress on the detonating cord section 8c, which is indicated by an arrow E in FIGS. 1 and 4.
  • the detonation interrupter 3 is designed for different detonating cord weights so that there is not too much play in the bores 6 and 7.
  • One of these adapted detonation interrupters 3 is therefore provided for each type of detonating cord. So there are adapted detonation interrupters 3 for detonating cord weights of 12 gr / m, 20 gr / m, 40 gr / m and 100 gr / m.
  • the detonating cords with cord weights of 12 and 20 gr / m are pulled through the device at 12 meters per second.
  • the detonating cords with cord weights of 40 and 100 gr / m run through the device at about 8 meters per second.
  • the detonating cord 8 runs like can be seen particularly clearly from FIGS. 1, 3 and 6, depending on the detonating cord weight, at a speed of, for example, 8 or 12 meters per second through the detonation interrupter 3 and the loop 8b. If a detonation runs into the first bore 6 via the detonating cord 8, then the air pressure which forms in the process can expand in the region of the expansion of the bore 9, the detonation point 3d; he hits the firing pin 11 and drives this to the second bore 7. The detonation passes through the detonating cord loop 8b while the firing pin 11 is driven to the second bore 7.
  • the firing pin 11 has severed the detonating cord in the second bore 7.
  • the train lying on the detonating cord 8 has pulled away the part of the detonating cord section 8c that has not yet been detonated. The detonation now hits the firing pin 11 and stops there.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Control Of Turbines (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Unterbrechen einer Sprengschnur für den Fall, daß eine ungewünschte Detonation durch die Sprengschnur läuft, wobei der Durchlauf dieser Detonation an einer definierten Detonationsstelle ein Trennelement auslöst, eine Vorrichtung zur Durchführung dieses Verfahrens und die Verwendung dieser Vorrichtung.The invention relates to a method for interrupting a detonating cord in the event that an undesired detonation runs through the detonating cord, the passage of this detonation triggering a separating element at a defined detonation point, a device for carrying out this method and the use of this device.

Sprengschnüre bestehen aus einer Sprengstoffseele und einem diese umgebenden Mantel. Der Sprengstoff, beispielsweise Nitropenta, kann in Granulatform mit einer Korngröße von ca. 0,2 mm zur Verarbeitung kommen. In der US-PS 29 82 210 ist eine solche Sprengschnur beschrieben, bei der der Mantel aus Metall besteht. Die US-PS 31 25 024 beschreibt eine Sprengschnur mit einem Gewebemantel. Bei der Herstellung solcher Sprengschnüre wird der rieselfähige Sprengstoff durch einen Trichter als rieselnder Strahl im freien Fall in die um den Strahl gesponnene Ummantelung geschüttet. Das zum Umspinnen verwendete Material sind beispielsweise Polypropylenbänder, um die zur weiteren Verfestigung Polypropylenschnüre gesponnen werden. Eine so gefertigte Sprengschnur wird nach der Vollendung der Umspinnung auf eine Vorratstrommel gewickelt und danach oder unmittelbar zur Weiterverarbeitung aus dem Spinnraum in einen anderen Behandlungsraum transportiert.Detonating cords consist of an explosive core and a jacket surrounding it. The explosive, for example nitropenta, can be processed in granular form with a grain size of approximately 0.2 mm. In US-PS 29 82 210 such a detonating cord is described in which the jacket is made of metal. The US-PS 31 25 024 describes an explosive cord with a fabric jacket. In the manufacture of such detonating cords, the free-flowing explosive is poured through a funnel as a free-flowing jet into the casing spun around the jet. The material used for spinning is, for example, polypropylene tapes around which polypropylene cords are spun for further strengthening. A detonating cord produced in this way is wound onto a storage drum after completion of the spinning and is then or immediately transported from the spinning room to another treatment room for further processing.

Wenn die Sprengschnur während des Spinnvorganges auf Grund irgendeines Behandlungsfehlers detonieren sollte, dann stellt dies für das Bedienungspersonal zwar eine Gefahr dar; die Folgen einer solchen Detonation sind für das Personal aber vertretbar. Größere Gefahr besteht, wenn die Detonation auf die Vorratstrommel übergreift. Diese Gefahr darf insbesondere deswegen nicht vernachlässigt werden, weil sich die Detonation in der Sprengschnur mit einer Geschwindigkeit von ca. 6000 m/sec fortpflanzt.If the detonating cord on the ground during the spinning process should detonate any treatment error, then this represents a danger for the operating personnel; the consequences of such a detonation are acceptable for the personnel. There is a greater risk if the detonation spreads to the storage drum. This danger should not be neglected in particular because the detonation propagates in the detonating cord at a speed of approx. 6000 m / sec.

Aus der US-PS 4 432 268, die als den nächtsliegenden Stand der Technik auzusehen ist, ist eine Trennvorrichtung für Dreigramm-Sprengschnüre bekannt, die aus einem Block besteht, der auf detonationssicherem Abstand zwei parallele Durchbrüche aufweist, die miteinander mittels sie verbindender Durchbrüche verbunden sind. Die Sprengschnur wird durch den ersten Durchbruch hindurch geführt, bildet dann eine Schleife und wird schließlich durch den zweiten Durchbruch zurückgeführt. Es sind stets mehrere den ersten und den zweiten Durchbruch verbindende Durchbrüche vorgesehen. Die vorgeschlagene Anzahl schwankt zwischen drei und neunzehn.From US Pat. No. 4,432,268, which is to be seen as the closest prior art, a separating device for three-gram detonating cords is known, which consists of a block which has a detonation-proof distance from two parallel openings which are connected to one another by means of openings connecting them are. The detonating cord is passed through the first breakthrough, then forms a loop and is finally returned through the second breakthrough. There are always several breakthroughs connecting the first and the second breakthrough. The proposed number ranges from three to nineteen.

Beim Auflaufen einer Detonation in dem ersten Durchbruch sollen Druckwellen der Detonation durch die verbindenden Durchbrüche hindurchlaufen und die Sprengschnur im zweiten parallelen Durchbruch durchtrennen. Das Durchtrennen mittels einer Druckluftwelle setzt einen stets ausreichenden Luftdruck voraus. Schon Schwankungen im Schnurdurchmesser im zweiten dem Durchtrennen dienenden Durchbruch können ein teilweises Verpuffen fördern und die Druckwelle schwächen. Das Vorsehen mehrerer Durchbrüche deutet auf eine statistische Unsicherheit der Durchtrennung hin. Eine solche statistische Unsicherheit ist unzulässig. Die Durchtrenn-Unsicherheit steigt zudem noch an, wenn die Vorrichtung bei dickeren Sprengschnüren eingesetzt werden sollte, bei denen das Gefährdungspotential steigt.When a detonation occurs in the first breakthrough, pressure waves of the detonation should pass through the connecting breakthroughs and cut the detonating cord in the second parallel breakthrough. Cutting through with a compressed air shaft always requires sufficient air pressure. Fluctuations in the cord diameter in the second breakthrough which is to be cut can promote partial fizzing and weaken the pressure wave. The provision of multiple breakthroughs indicates a statistical uncertainty of the severance. Such statistical uncertainty is not allowed. The severing uncertainty is also increasing still on when the device should be used with thicker detonating cords where the hazard potential increases.

Ein weiterer wesentlicher Nachteil der bekannten Vorrichtung besteht in seiner räumlichen Länge. Wo wenig Platz zur Verfügung steht, ist die Vorrichtung nicht einsetzbar, weil zu dem Block stets noch die Schleife hinzukommt.Another major disadvantage of the known device is its spatial length. Where little space is available, the device cannot be used because the loop is always added to the block.

Es ist Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung zu schaffen, mit denen es möglich ist, die Sprengschnur im Falle der Detonation zwischen einem detonierenden Abschnitt, beispielsweise im Bereich einer Herstellungsmaschine, und einem nicht detonierten Abschnitt, in dem beispielsweise eine Weiterverarbeitung erfolgt, sicher zu unterbrechen, bevor die Detonation den Abschnitt erreicht, der nicht detonieren soll oder darf.It is an object of the invention to provide a method and a device with which it is possible to detonate the detonating cord in the event of a detonation between a detonating section, for example in the area of a production machine, and an un-detonated section in which, for example, further processing takes place. safely interrupt before the detonation reaches the section that should or should not detonate.

Die gestellte Aufgabe ist erfindungsgemäß mit einem Verfahren gelöst, bei dem der Durchlauf dieser Detonation an einer definierten Detonationsstelle ein bewegliches mechanisches Trennelement auslöst, das mit Sicherheit einen von der Detonation noch nicht erfaßten Abschnitt der Sprengschnur an einer Schnittstelle abtrennt, so daß dieser Abschnitt von der Detonation nicht mehr erreicht werden kann, wobei die Länge des Sprengschnurteils zwischen dieser definierten Detonationserfassungsstelle und dieser Schnittstelle so bemessen wird, daß die Detonation diese Schnittstelle erst erreichen kann, wenn das mechanische Trennelement den Abschnitt der Sprengschnur abgetrennt hat.The object is achieved according to the invention with a method in which the passage of this detonation at a defined detonation point triggers a movable mechanical separating element which certainly cuts off a section of the detonating cord that has not yet been detected by the detonation at an interface, so that this section of the Detonation can no longer be achieved, the length of the detonating cord part between this defined detonation detection point and this interface being dimensioned such that the detonation can only reach this interface when the mechanical separating element has cut off the section of the detonating cord.

Die große Betriebssicherheit der Vorrichtung besteht darin, daß die Detonation selbst für die mechanische Durchtrennung des noch nicht detonierten Teiles der Sprengschnur sorgt. Diese mechanische Durchtrennung und der mit dem mechanischen Trennelement verbundene Schereffekt sind betriebssicher.The great operational safety of the device is that the detonation itself ensures the mechanical severing of the part of the detonating cord that has not yet been detonated. This mechanical severing and the shear effect associated with the mechanical separator are reliable.

Eine Vorrichtung zur Durchführung des Verfahrens hat einen Block aus hochreißfestem Material, der zwei in einem detonationssicheren Abstand voneinander angeordnete Durchbrüche aufweist, durch die eine Sprengschnur in einer Schleife hindurchgeführt ist, wobei die Durchbrüche im Inneren des Blockes mittels einer Verbindungsbohrung verbunden sind, und ist dadurch gekennzeichnet, daß -in dieser Verbindungsbohrung ein als Trennelement wirkender Schlagbolzen verschieblich gelagert ist; und -die Schleifenlänge vom ersten Durchbruch zum zweiten Durchbruch so lang ausgebildet ist, daß der Schlagbolzen, wenn er durch eine Detonation in der Sprengschnur im ersten Durchbruch in Richtung auf den zweiten Durchbruch verschoben wird, die noch nicht detonierte Sprengschnur im zweiten Durchbruch durchschlägt und abtrennt, bevor die Detonation an diesem zweiten Durchbruch aufläuft.An apparatus for carrying out the method has a block made of highly tear-resistant material, which has two openings, which are arranged at a detonation-proof distance from one another, through which a detonating cord is guided in a loop, the openings being connected to the inside of the block by means of a connecting bore, and is thereby characterized in that a firing pin acting as a separating element is slidably mounted in this connecting bore; and the loop length from the first breakthrough to the second breakthrough is so long that the firing pin, if it is moved by a detonation in the detonating cord in the first breakthrough in the direction of the second breakthrough, breaks through and detaches the undetected detonating cord in the second breakthrough before the detonation occurs on this second breakthrough.

Damit ist eine sehr gedrängte und kleinbauende, wirkungsvolle Vorrichtung geschaffen, in der der Schlagbolzen von einem die Detonation und damit den Detonationsdruck aufnehmenden Durchbruch zum anderen geschlagen wird, bevor dort die Detonation aufläuft. Der Schlagbolzen schert die Sprengschnur im zweiten Durchbruch ab und versperrt ihn. Die in ihn eventuell einlaufende Detonation findet damit einen Anschlag, der das Weiterlaufen der Detonation verhindert. Der auf Zug belastete, der Weiterverarbeitung zugeführte undetonierte Teil der Sprengschnur wird auf Grund der Zugbewegung vorzugsweise vor dem Auflaufen auf den vom eingefahrenen Schlagbolzen gesperrten Durchbruch weggezogen, sodaß eine Gefahr des Weiterlaufens der Detonation noch weiter verringert ist.This creates a very compact and compact, effective device in which the firing pin is struck from one breakthrough which detonates and thus detonation pressure to the other before the detonation occurs there. The firing pin shears off the detonating cord in the second breakthrough and blocks it. The detonation possibly entering it thus finds a stop which prevents the detonation from continuing. The undetonated part of the detonating cord, which is loaded on the train and fed to further processing, is preferably pulled away due to the train movement before it hits the opening blocked by the retracted firing pin, so that one The risk of the detonation continuing is reduced even further.

Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß der Detonationsunterbrecher und der Schlagbolzen aus Stahl bestehen. Aus Stahl haben sich diese Teile als besonders funktionstüchtig erwiesen.According to a further embodiment of the invention it is provided that the detonation interrupter and the firing pin are made of steel. These parts made of steel have proven to be particularly functional.

Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß wenigstens der Stahl des Schlagbolzens gehärtet ist. Die Gefahr einer Verformung durch die Detonation ist damit verringert, und der Schlagbolzen bleibt mit großer Sicherheit in seinem Führungsdurchbruch verschieblich.According to a further embodiment of the invention it is provided that at least the steel of the firing pin is hardened. The risk of deformation due to the detonation is thus reduced, and the firing pin remains with great certainty in its guide opening.

Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß der Schlagbolzen an seiner Durchtrennseite mit einer Schneidkante versehen ist. Die Schneidkante erleichtert die Durchtrennung.According to a further embodiment of the invention it is provided that the firing pin is provided with a cutting edge on its severing side. The cutting edge facilitates cutting.

Nach einer weiteren Ausgestaltung der Erfindung ist eine Verwendung derart vorgesehen, daß die Schleife über eine Schleifenumlenkrolle geführt und die Schleifenlänge vom ersten Durchbruch zum zweiten Durchbruch so lang ausgebildet ist, daß der Schlagbolzen den zweiten Durchbruch mit dem noch undetonierten Abschnitt der Sprengschnur nach dem Durchtrennen der Sprengschnur bereits abgeschlossen hat, wenn die Detonation an diesem zweiten Durchbruch aufläuft. Die Schleife ist damit das Ausgleichsglied, das dem Schlagbolzen die erforderliche Zeit gibt, um den undetonierten Abschnitt der Sprengschnur rechtzeitig zu durchtrennen.According to a further embodiment of the invention, use is provided such that the loop is guided over a loop deflection roller and the loop length from the first opening to the second opening is so long that the firing pin has the second opening with the still undetonated section of the detonating cord after cutting through the Detonating cord has already completed when the detonation occurs on this second breakthrough. The loop is thus the compensating element, which gives the firing pin the time required to cut through the undetonated section of the detonating cord in good time.

Nach einer weiteren Ausgestaltung der Erfindung ist eine Verwendung derart vorgesehen, daß dem ersten der auf detonationssicherem Abstand angeordneten Durchbrüche, auf den die Detonation zuerst aufläuft, die Sprengschnur aus ihrer Herstellungsmaschine zuführbar ist und daß die den zweiten Durchbruch durchlaufende Sprengschnur nach dem Verlassen dieses zweiten Durchbruches der Bevorratung auf einer Vorratstrommel oder der Weiterverarbeitung zuführbar ist. Obwohl die Vorrichtung mannigfaltig einsetzbar ist, so eignet sie sich besonders zwischen der Herstellungs-, beispielsweise der Spinnmaschine und der Weiterverarbeitungsstelle, die entweder die unmittelbar benachbarte Vorratstrommel oder eine Weiterverarbeitungsstelle in einem benachbarten Produktionsraum sein kann.According to a further embodiment of the invention, use is provided such that the detonating cord can be fed from the production machine to the first of the breakthroughs arranged at a detonation-safe distance, upon which the detonation first occurs, and that the detonating cord passing through the second breakthrough after leaving this second breakthrough the supply can be supplied on a storage drum or for further processing. Although the device can be used in a variety of ways, it is particularly suitable between the manufacturing, for example the spinning machine and the further processing point, which can either be the immediately adjacent storage drum or a further processing point in an adjacent production area.

Die Erfindung wird anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 einen Schnitt durch eine Vorrichtung zur Unterbrechung einer Sprengschnur für den Fall einer unerwünschten Detonation, mit zwei Durchführungen für die Enden einer Sprengschnurschleife in einem als Detonationsunterbrecher ausgebildeten Körper,
  • Fig.2 einen Schnitt durch die Vorrichtung nach Fig.1 längs der Linie II-II in Fig.1,
  • Fig. 3 die Darstellung der Sprengschnurführung vor und hinter dem Detonationsunterbrecher mit der vollständigen Ausbildung der in Fig.1 angedeuteten Sprengschnurschleife und der Zuführung von einer nicht dargestellten Spinnmaschine,
  • Fig. 4 eine Ansicht D nach Fig.3, die insbesondere die Sprengschnurführung zeigt, nachdem die Sprengschnur den Detonationsunterbrecher verlassen hat,
  • Fig. 5 eine Umlenkvorrichtung für die Sprengschnur bis zum Einlaufen der Sprengschnur in eine aufwickelnde Vorratstrommel,
  • Fig.6 die Wirkungsweise des Detonationsunterbrechers beim Auflaufen einer Detonation.
The invention is explained in more detail with reference to the drawing. Show it:
  • 1 shows a section through a device for interrupting an explosive cord in the event of an undesired detonation, with two bushings for the ends of an explosive cord loop in a body designed as a detonation interrupter,
  • 2 shows a section through the device according to FIG. 1 along the line II-II in FIG. 1,
  • 3 shows the detonating cord guide in front of and behind the detonation interrupter with the complete formation of the detonating cord loop indicated in FIG. 1 and the feeding of one not shown Spinning machine,
  • 4 shows a view D according to FIG. 3, which shows in particular the detonating cord guide after the detonating cord has left the detonation interrupter,
  • 5 a deflecting device for the detonating cord until the detonating cord has entered a reeling supply drum,
  • 6 shows the mode of operation of the detonation interrupter when a detonation occurs.

Fig. 1 und 2 zeigen die Vorrichtung zur Unterbrechung einer Sprengschnur für den Fall einer ungewünschten Detonation. Das Kernstück 3 dieser Vorrichtung wird im folgenden als Detonationsunterbrecher bezeichnet. Dieser Detonationsunterbrecher 3 besteht aus einer stählernen Walze, deren Material gegebenfalls gehärtet sein kann. Quer zur Achse 5 des Detonationsunterbrechers 3 erstrecken sich zwei Durchbrüche in Form einer ersten Bohrung 6 und einer zweiten Bohrung 7. Der gegenseitige Abstand A der Bohrungen 6 und 7 ist so bemessen, daß die Detonation in einer der Bohrungen 6 in der anderen Bohrung 7 keine Detonation initiieren kann. Im ausgeführten Beispiel wird in die erste Bohrung 6 eine Sprengschnur 8 eingeführt von der Umfangsseite 3a des Detonationsunterbrechers 3 her. Die Sprengschnur 8 durchzieht die Bohrung 6 mit einem Sprengschnurabschnitt 8a in Richtung des Pfeiles B. Über eine angedeutete Schleife 8b wird die Sprengschnur mit dem Abschnitt 8c in Richtung des Pfeiles C in Gegenrichtung erneut zum Detonationsunterbrecher 3 und von der Seite 3b her durch dessen zweite Bohrung 7 geführt. Nach dem Verlassen des Detonationsunterbrechers 3 erfolgt dann eine Weiterführung der Sprengschnur zu einer Vorratstrommel und/oder einer weiteren Bearbeitungsstelle. Die Weiterführung der Sprengschnur 8 zur Vorratstrommel 16 ist anhand der Fig. 4 und 5 erläutert.1 and 2 show the device for interrupting an explosive cord in the event of an undesired detonation. The core 3 of this device is referred to below as a detonation interrupter. This detonation interrupter 3 consists of a steel roller, the material of which may have been hardened. Transversely to the axis 5 of the detonation interrupter 3, two openings extend in the form of a first bore 6 and a second bore 7. The mutual distance A of the bores 6 and 7 is dimensioned such that the detonation in one of the bores 6 in the other bore 7 is none Can initiate detonation. In the example shown, an explosive cord 8 is inserted into the first bore 6 from the peripheral side 3a of the detonation interrupter 3. The detonating cord 8 runs through the bore 6 with an explosive cord section 8a in the direction of the arrow B. Via an indicated loop 8b, the detonating cord with the section 8c in the direction of the arrow C in the opposite direction again becomes the detonation interrupter 3 and from the side 3b through its second bore 7 led. After this Leaving the detonation interrupter 3, the detonating cord is then carried on to a storage drum and / or a further processing point. The continuation of the detonating cord 8 to the storage drum 16 is explained with reference to FIGS. 4 and 5.

Die Bohrungen 6 und 7 können parallel verlaufen, können aber auch gegeneinander geneigt sein, wie es aus Fig.1 zu ersehen ist. Die Bohrungen 6 und 7 müssen auch nicht in der aus Fig. 1 zu ersehenden Ebene verlaufen; sie können ebenso um die Achse 5 gegeneinander verstellt sein. Wichtig ist nur, daß der gegenseitige Abstand A so groß gewählt ist, daß keine gegenseitige Detonationsinitiierung möglich ist.The bores 6 and 7 can run parallel, but can also be inclined towards one another, as can be seen from FIG. The holes 6 and 7 do not have to run in the plane shown in FIG. 1; they can also be adjusted relative to one another about axis 5. It is only important that the mutual distance A is chosen so large that no mutual detonation initiation is possible.

In Richtung der Achse 5 ist quer zu den Bohrungen 6 und 7 eine weitere Verbindungsbohrung 9 vorgesehen, die die Bohrungen 6 und 7 verbindet. Die Verbindungsbohrung 9 beginnt außen und führt durch den Bereich der zweiten Bohrung 7 zur ersten Bohrung 6. Von außen her ist die Verbindungsbohrung 9 mittels einer Verschlußschraube 10 verschlossen. In der Verbindungsbohrung 9 befindet sich zwischen den Bohrungen 6 und 7 ein Schlagbolzen 11. Der Schlagbolzen 11 ist in der Verbindungsbohrung 9 frei verschieblich; er besteht vorzugsweise aus gehärtetem Stahl und ist an seiner der zweiten Bohrung 7 zugewandten Seite mit einer Schneidkante 11a versehen.In the direction of the axis 5, a further connecting bore 9 is provided transversely to the bores 6 and 7, which connects the bores 6 and 7. The connecting bore 9 begins on the outside and leads through the region of the second bore 7 to the first bore 6. The connecting bore 9 is closed from the outside by means of a screw plug 10. A firing pin 11 is located in the connecting hole 9 between the holes 6 and 7. The firing pin 11 is freely displaceable in the connecting hole 9; it is preferably made of hardened steel and is provided on its side facing the second bore 7 with a cutting edge 11a.

Die Sprengschnur 8 verläßt, wie nicht näher erläutert ist, vertikal von oben eine nicht dargestellte Spinnmaschine; sie läuft, wie Fig.3 zeigt, mehrmals geschlungen über ein Abzugssrad 12 in eine Umlenkrolle 13 ein und von dieser in die erste Bohrung 6 des Detonationsunterbrechers 3. Die Schleife 8b wird gebildet mit Hilfe einer Umlenkrolle 14. Von der Umlenkrolle 14 wird der Sprengschnurabschnitt 8c dann zur zweiten Bohrung 7 zurück und durch diese hindurchgeführt. Anhand von Fig. 4 ist zu erkennen, wie eine weitere Umlenkrolle 15 die Sprengschnur 8 zu einem nicht dargestellten Fangbügel 17 mit zwei Leitrollen 18 und einer Übergaberolle 19 führt. Der aus Fig.5 zu erkennende Fangbügel 17 ist auf nicht dargestellte Weise zwischen den Flanschen der Vorratstrommel 16 hin und her verfahrbar, um so die Sprengschnur 8 gleichmäßig auf die Vorratstrommel 16 aufzuwickeln. Die Vorratstrommel 16 übt dabei auf die Sprengschnur 8 eine Zugkraft aus, so daß die Sprengschnur 8 von der Spinnmaschine durch die Vorrichtung und damit durch den Detonationsunterbrecher 3 gezogen wird. Im Detonator liegt damit auch an dem Sprengschnurabschnitt 8c eine Zugspannung an, die durch einen Pfeil E in Fig.1 und 4 angegeben ist.The detonating cord 8, as is not explained in more detail, leaves a spinning machine (not shown) vertically from above; it runs, as shown in FIG. 3, several times looped via a trigger wheel 12 into a deflection roller 13 and from there into the first bore 6 of the detonation interrupter 3 Loop 8b is formed with the aid of a deflecting roller 14. From the deflecting roller 14, the detonating cord section 8c is then returned to the second bore 7 and passed through it. 4 shows how a further deflection roller 15 leads the detonating cord 8 to a safety catch 17, not shown, with two guide rollers 18 and a transfer roller 19. The catch bracket 17 shown in FIG. 5 can be moved back and forth between the flanges of the storage drum 16 in a manner not shown in order to wind the detonating cord 8 evenly on the storage drum 16. The supply drum 16 exerts a tensile force on the detonating cord 8, so that the detonating cord 8 is pulled by the spinning machine through the device and thus through the detonation interrupter 3. In the detonator, there is also a tensile stress on the detonating cord section 8c, which is indicated by an arrow E in FIGS. 1 and 4.

Der Detonationsunterbrecher 3 ist ausgelegt für verschiedene Sprengschnurgewichte, damit in den Bohrungen 6 und 7 nicht zuviel Spiel vorliegt. Für jede Sprengschnursorte ist deshalb ein dieser angepaßter Detonationsunterbrecher 3 vorgesehen. Es gibt also angepaßte Detonationsunterbrecher 3 für Sprengschnurgewichte von 12 gr/m, 20 gr/m, 40 gr/m und 100 gr/m. Die Sprengschnüre mit Schnurgewichten von 12 und 20 gr/m werden mit 12 Metern pro Sekunde durch die Vorrichtung hindurchgezogen. Die Sprengschnüre mit Schnurgewichten von 40 und 100 gr/m laufen mit etwa 8 Meter pro Sekunde durch die Vorrichtung hindurch.The detonation interrupter 3 is designed for different detonating cord weights so that there is not too much play in the bores 6 and 7. One of these adapted detonation interrupters 3 is therefore provided for each type of detonating cord. So there are adapted detonation interrupters 3 for detonating cord weights of 12 gr / m, 20 gr / m, 40 gr / m and 100 gr / m. The detonating cords with cord weights of 12 and 20 gr / m are pulled through the device at 12 meters per second. The detonating cords with cord weights of 40 and 100 gr / m run through the device at about 8 meters per second.

Fig. 6 zeigt die angestrebte Wirkung des Detonationsunterbrechers 3 . Die Sprengschnur 8 läuft, wie aus Fig.1,3 und 6 besonders deutlich zu ersehen ist, je nach Sprengschnurgewicht mit einer Geschwindigkeit von beispielsweise 8 oder 12 Metern pro Sekunde durch den Detonationsunterbrecher 3 und die Schleife 8b hindurch. Läuft über die Sprengschnur 8 eine Detonation in die erste Bohrung 6 ein, dann kann sich der sich dabei ausbildende Luftdruck im Bereich der Erweiterung der Bohrung 9, der Detonationsstelle 3d, ausdehnen; er trifft dabei auf den Schlagbolzen 11 und treibt diesen auf die zweite Bohrung 7 zu. Die Detonation durchläuft, während der Schlagbolzen 11 zur zweiten Bohrung 7 getrieben wird, die Sprengschnurschleife 8b. Noch bevor die Detonation in der Sprengschnur 8 die zweite Bohrung 7 erreicht, hat der Schlagbolzen 11 die Sprengschnur in der zweiten Bohrung 7 durchtrennt. Wie aus Fig.6 zu erkennen ist, hat der an der Sprengschnur 8 liegende Zug den noch nicht detonierten Teil des Sprengschnurabschnittes 8c weggezogen. Die Detonation läuft nun auf den Schlagbolzen 11 auf und bleibt dort stehen.6 shows the desired effect of the detonation interrupter 3. The detonating cord 8 runs like can be seen particularly clearly from FIGS. 1, 3 and 6, depending on the detonating cord weight, at a speed of, for example, 8 or 12 meters per second through the detonation interrupter 3 and the loop 8b. If a detonation runs into the first bore 6 via the detonating cord 8, then the air pressure which forms in the process can expand in the region of the expansion of the bore 9, the detonation point 3d; he hits the firing pin 11 and drives this to the second bore 7. The detonation passes through the detonating cord loop 8b while the firing pin 11 is driven to the second bore 7. Even before the detonation in the detonating cord 8 reaches the second bore 7, the firing pin 11 has severed the detonating cord in the second bore 7. As can be seen from FIG. 6, the train lying on the detonating cord 8 has pulled away the part of the detonating cord section 8c that has not yet been detonated. The detonation now hits the firing pin 11 and stops there.

Wie schnell die Detonation die zweite Bohrung 7 erreicht, hängt unmittelbar von der Länge der Schleife 8b und der Art des Sprengstoffes in der Sprengschnur 8 ab. Diese muß also so bemessen werden, daß die Detonation erst auf die zweite Bohrung 7 auflaufen kann, wenn der Schlagbolzen 11 den Abschnitt 8c der Sprengschnur 8 durchtrennt hat. Da die Fortpflanzungsgeschwindigkeit der Detonation von beispielsweise 6000 m/sec bekannt ist, läßt sich die Schleifenlänge ohne weiteres errechnen.How quickly the detonation reaches the second bore 7 depends directly on the length of the loop 8b and the type of explosive in the detonating cord 8. This must therefore be dimensioned such that the detonation can only run onto the second bore 7 when the firing pin 11 has cut through the section 8c of the detonating cord 8. Since the propagation speed of the detonation of 6000 m / sec, for example, is known, the loop length can be easily calculated.

Claims (7)

  1. Method for interrupting and detonating cord (8) in case of an unwanted detonation running through the detonating cord (8), whereby the running of that mentioned detonation triggers at a defined detonation point a moveable, mechanical element (11), which reliable separates a section (8c) of the detonating cord (8) not yet caught by the detonation, so that the so mentioned separated section (8c) can no longer be reached by the detonating, whereby the length of the section (8b) of detonating cord between the defined detonation point caught by the detonation and point of interruption is measured so that the detonation running through the detonation cord could not have reached the mentioned point of interruption, when the mechanical separating element (11) has separated the section (8c) of the detonating cord (8).
  2. Device for putting the method of claim 1 into practice with a block (3) made out of a highly tearresistant material having two through holes (6,7) arranged at a detonation secure distance (A) from each other, through those an detonating cord (8) is led in a loop (8b), whereby the through holes (6,7) inside the block (3) are connected by means of a connecting bore (9), characterised in that
    - a stroke bolt (11) acting as a separating element is supported moveably in that connecting bore (9),
    and
    - the length of loop from the first through hole (6) to the second through hole (7) is designed so long that, when the stroke bolt (11) is displaced in the direction of the second through hole (7) by a detonation in the detonation cord (8) in the first through hole (6), the stroke bolt (11) penetrates and separates the undetonated detonating cord (8) in the second through hole (7) before the detonation runs up to that second through hole (7).
  3. Device according to claim 2, characterized in that the block (3) and the stroke bolt (11) are made out of steel.
  4. Device according to claim 2, characterized in that at least the steel of the stroke bolt (11) is hardened.
  5. Device according to claim 3 or 4, characterized in that the stroke bolt (11) is equipped with a cutting edge (11a) on its cutting side.
  6. Use of a device according to claim 2 to 5, characterized in that the loop (8b) is guided via a loop reversing control device (14) and the loop length from the first through hole (6) to the second through hole (7) is designed in such a way, that the stroke bolt (11) has already cut through the detonating cord (8) within the undetonated section (8c) and has sealed the second through hol (7), when the detonation runs up to that second through hole (7).
  7. Use of a device according to claim 6, characterized in that the detonating cord (8) - coming from the manufacturing mashine - reaches the first through hole (6) arranged at a detonation-proof distance (A) from the second through hole (7), which mentioned first through hole (6) reliable would be arrived by the detonation, and that the detonating cord (8) passing the second through hole (7) in the undetonated mode leaves the second through hole (7) arriving a delivery drum or being led to further handling operations.
EP19930119478 1992-12-16 1993-12-03 Method for interrupting a detonating cord in case of an unwanted detonation and device for putting this method into practice Expired - Lifetime EP0602470B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242458 1992-12-16
DE19924242458 DE4242458C1 (en) 1992-12-16 1992-12-16 Method for interrupting explosive fuse in event of undesired detonation - has detonation running through fuse interrupted by movable dividing component.

Publications (3)

Publication Number Publication Date
EP0602470A2 EP0602470A2 (en) 1994-06-22
EP0602470A3 EP0602470A3 (en) 1995-04-05
EP0602470B1 true EP0602470B1 (en) 1996-08-28

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ID=6475424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930119478 Expired - Lifetime EP0602470B1 (en) 1992-12-16 1993-12-03 Method for interrupting a detonating cord in case of an unwanted detonation and device for putting this method into practice

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EP (1) EP0602470B1 (en)
DE (1) DE4242458C1 (en)
ES (1) ES2092211T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775771B1 (en) * 1998-03-05 2000-05-26 Nobel Explosifs France DETONATION CUTTING DEVICE FOR BULK EXPLOSIVE PUMPING CIRCUIT
US20050040071A1 (en) * 2003-08-21 2005-02-24 Detotec North America, Inc. Diode cutoff and safe packaging method for textile detonating cord
US7410049B2 (en) 2003-08-21 2008-08-12 Detotec North America, Inc. Diode cutoff and safe packaging system for detonating cord
RU2474784C1 (en) * 2011-06-30 2013-02-10 Государственное Образовательное Учреждение Высшего Профессионального Образования "Московский Государственный Технический Университет Имени Н.Э. Баумана" Device for isolation of explosive subjects

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125024A (en) * 1964-03-17 Explosive connecting cord
US2982210A (en) * 1958-06-25 1961-05-02 Ensign Bickford Co Connecting cord
US3342131A (en) * 1965-07-06 1967-09-19 Du Pont Safe-arm mechanism for explosive trains
US4432268A (en) * 1982-08-16 1984-02-21 Ireco Chemicals Detonation cut-off device

Also Published As

Publication number Publication date
EP0602470A3 (en) 1995-04-05
EP0602470A2 (en) 1994-06-22
DE4242458C1 (en) 1994-03-17
ES2092211T3 (en) 1996-11-16

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