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WO2018059999A1 - Écran métallique pour champs de tir - Google Patents

Écran métallique pour champs de tir Download PDF

Info

Publication number
WO2018059999A1
WO2018059999A1 PCT/EP2017/073572 EP2017073572W WO2018059999A1 WO 2018059999 A1 WO2018059999 A1 WO 2018059999A1 EP 2017073572 W EP2017073572 W EP 2017073572W WO 2018059999 A1 WO2018059999 A1 WO 2018059999A1
Authority
WO
WIPO (PCT)
Prior art keywords
bullet
liquid
bullets
walls
bullet trap
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.)
Ceased
Application number
PCT/EP2017/073572
Other languages
English (en)
Inventor
Luciano VAZZOLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuova Elettrica Srl
Original Assignee
Nuova Elettrica Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nuova Elettrica Srl filed Critical Nuova Elettrica Srl
Publication of WO2018059999A1 publication Critical patent/WO2018059999A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J13/00—Bullet catchers

Definitions

  • the present invention relates to a bullet trap for shooting ranges.
  • Backstops not only have the task to cancel out the energy of the bullet. They also have to simultaneously provide for two other important functions: protecting the environment, and ensuring healthy working conditions for the employees and users.
  • a first type of such bullet trap are steel backstops, in which the principle is to brake the bullets by allowing them to slide on steel plates that are inclined with respect to the path.
  • Such a backstop is known in various different configurations, i.e. ramp backstops, Venetian blind backstops, involute-shaped backstops and wells backstops, but none of these is preferable insofar as it improves the above-mentioned drawbacks, which all of these have in common.
  • a second type of such bullet trap is the backstop made of recycled rubber, i.e. rubber obtained from tires, conveyor belts, blocks of swarf and the like.
  • the aim of the present invention is to provide a bullet trap for shooting ranges which is capable of improving the known art in one or more of the above mentioned aspects.
  • an object of the invention is to provide a bullet trap by virtue of which the shattering of the bullet and the release of lead dust are greatly reduced, if not eliminated.
  • Another object of the invention is to provide a bullet trap that does not require costs for the separation of materials in order to recover the lead of the bullets.
  • Another object of the invention is to provide a bullet trap that makes it possible to recover the bullets in a substantially integral state.
  • Another object of the invention is to provide a bullet trap by virtue of which the separation of the bullets collected does not require any special labor.
  • a still further object of the present invention is to overcome the drawbacks of the known art in a different manner to any existing solutions.
  • FIG. 1 is a schematic side view of a bullet trap according to the invention.
  • FIG. 1 is a front elevation view of the bullet trap according to the invention.
  • FIG. 3 is a schematic view from above of the bullet trap according to the invention.
  • FIG. 4 is a partially exploded side view of a detail of the bullet trap according to the invention.
  • FIG. 5 is a schematic transverse cross-sectional view of a part of the detail in Figure 4;
  • FIG. 6 is a schematic cross-sectional side view of another detail of the bullet trap according to the invention.
  • Figure 7 is a rear view of the detail in Figure 6;
  • FIG. 8 is a view from below of the detail in Figures 6 and 7;
  • FIG. 9 is a partially exploded cross-sectional side view of another detail of the bullet trap according to the invention.
  • a bullet trap according to the invention is generally designated by the reference numeral 10.
  • Such bullet trap 10 comprises:
  • the deflection chamber 11 comprises four inclined walls, i.e. a triangular upper wall 12, a likewise triangular lower wall 13, and two opposite trapezoidal side walls 14 and 15.
  • the inclined walls 12, 13, 14 and 15 define a deflection chamber 11 that is substantially shaped like a truncated pyramid, with a rectangular front bullet entry opening 16 and a likewise rectangular rear bullet exit slot 17, which extends predominantly vertically.
  • the means 18 of wetting the inclined walls 12, 13, 14 and 15 comprise a pump assembly 22, which is arranged so as to draw a cooling liquid 24 from a collection tub 23, and is adapted to dispense such liquid, pressurized, filtered through a filter 25, by way of a first upper manifold 26, fed by means of corresponding first pipes 28, which is designed to dispense liquid against the upper inclined wall 12, from which the liquid then descends, inundating the side walls 14 and 15 and the lower wall 13.
  • the liquid curtain 19 comprises a second upper manifold 27, which is arranged above the front opening 16, is fed by the pump assembly 22 by way of corresponding second pipes 29, and extends for the entire width of the front opening 16.
  • the second upper manifold 27 is provided with two liquid intakes 31 and 32, each one of which is connected to a corresponding pipe 29, an intake chamber 33, where the liquid enters under pressure with a vortical motion, and an underlying flow stabilizing partition 34.
  • Such flow stabilizing partition 34 is constituted for example by a plate with through openings in a honeycomb pattern.
  • the liquid descends, by way of the flow stabilizing partition 34, with a laminar flow into a chamber 36 that tapers downward and that is provided with an array of exit holes 35.
  • Such array of exit holes 35 has a plurality of rows of holes 37, 38, 39 and 40.
  • Such liquid curtain 19 comprises as many closely- spaced films of liquid as there are rows of holes in the array of exit holes 35, for example four.
  • the liquid curtain 19 acts as a liquid barrier, with no splashes or turbulence, that affects the front opening 16 across its whole width and for its whole height, and is adapted to slow the bullets before they reach the inside of the deflection chamber 11 , and at the same time cool them.
  • the fall of the liquid from the second manifold 27 also has the effect of maintaining that liquid at ambient temperature.
  • the rear tubular body 20, with a vertical axis, for the dissipation of the kinetic and thermal energy of the bullets, is constituted by an external pipe 41 inside which there are multiple vertical redirection walls 42, 43, 44, 45, 46 and 47, which are arranged so as to divert the bullet that enters through the slot 17 toward one of the subsequent walls so that the bullet travels along a spiral trajectory, thus dissipating its kinetic energy and falling downward into the central region 48 of the tubular body 20 proper.
  • Such vertical redirection walls 42, 43, 44, 45, 46 and 47 are made of ballistic steel.
  • the tubular body 20 is inundated by the collection and cooling liquid in the compartment defined by the vertical redirection walls, by way of an upper conical diffuser 50 which is clearly visible in Figure 4, supported by a lid 53.
  • the liquid is pumped by the pump assembly 22 and reaches the upper conical diffuser 50 by way of a corresponding pipe 51.
  • the liquid introduced through the upper diffuser 50 cools the redirection walls 42, 43, 44, 45, 46 and 47, slows the bullets and cools them, and cooperates to entrain downward any fragments and dust into which a bullet may have disintegrated.
  • the funnel-shaped bottom 52 is also provided with a lower conical diffuser 54 which is adapted to both diffuse the descending liquid into the automatic recovery means 21 , and at the same time to protect the underlying recovery means 21 from any bullets that are still ricocheting and whose kinetic energy is not yet exhausted.
  • such means 21 of automatic recovery of the bullets from the collection and cooling liquid comprise a centrifugal separator 55 and a collection container 56.
  • Such centrifugal separator 55 is fixed below the funnel-shaped bottom 52 and is connected thereto.
  • the funnel-shaped bottom 51 introduces collected liquid and bullets into a rotating perforated basket 57, which is rotated by corresponding motorized means, for example an electric motor 58, for example by way of a belt transmission 59.
  • motorized means for example an electric motor 58, for example by way of a belt transmission 59.
  • the rotating basket 57 is contained in a liquid collection chamber 60, with a liquid discharge outlet 61 on the bottom.
  • the rotation of the perforated basket 57 causes the exit of the collected bullets, which are heavier than the liquid, from the upper opening 62 of the rotating basket 57, from which the bullets fall onto an annular chute 63 and from there into an exit duct 64.
  • the collected bullets are introduced into the collection container 56.
  • the collection container 56 is constituted by a hermetically- sealed container, made of plastic material or made of metallic material.
  • the liquid 24 used in such a bullet trap is constituted for example by a non-flammable liquid substance, non-toxic on contact, inhalation and ingestion; such liquid is preferably odorless and colorless.
  • a non-flammable liquid substance non-toxic on contact, inhalation and ingestion
  • such liquid is preferably odorless and colorless.
  • the function of such liquid is to slow and cool the bullets, without evaporating, and to maintain the walls, both of the deflection chamber 11 and of the tubular body 20, at ambient temperature, and also to retain any hazardous dust created with the impacts of the bullets.
  • the liquid curtain 19 further prevents any vapors, fragments and dust from exiting the deflection chamber 11 through the front.
  • the collection tub 23 is contoured and dimensioned so as to collect the liquid that descends from the walls of the deflection chamber 11 , the liquid that descends from the liquid curtain 19 and the liquid that descends from the centrifugal separator 55.
  • the collection tub 23 is provided, in the fall zone of the liquid curtain 19, with a splash guard 70, which is constituted by a metallic grille covered in an upper region by a mat made of micro-perforated plastic material, which is adapted to eliminate splashes and turbulence in the liquid 24 created by the flows descending from the liquid curtain 19 and from the deflection chamber 11.
  • a splash guard 70 which is constituted by a metallic grille covered in an upper region by a mat made of micro-perforated plastic material, which is adapted to eliminate splashes and turbulence in the liquid 24 created by the flows descending from the liquid curtain 19 and from the deflection chamber 11.
  • a bullet trap has been devised by virtue of which the shattering of the bullet and the release of lead dust are greatly reduced, if not eliminated, by virtue of the cooling and collecting effect produced by the liquid on the bullets, the deflection chamber and the vertical redirection walls.
  • a bullet trap has been devised that does not require costs for the separation of materials in order to recover the lead of the bullets, by virtue of the means of automatic recovery of the bullets.
  • a bullet trap has been devised that makes it possible to recover the bullets in a substantially integral state, since the cooling to which the bullets are subjected decreases the risk of sublimation or disintegration.
  • a bullet trap has been devised by virtue of which the separation of the bullets collected does not require any special labor, it being carried out automatically by the centrifugal separator, which is motorized.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Abstract

La présente invention concerne un écran métallique pour champs de tir (10), comprenant : - une chambre de déviation (11) comprenant des parois inclinées convergentes (12, 13, 4, 15), avec une ouverture avant (16) pour l'entrée des balles et une fente arrière (17) pour la sortie des balles, - des moyens (18) de mouillage des parois inclinées avec un liquide de refroidissement, - un rideau de liquide (19) disposé de façon à affecter l'ouverture d'entrée de balles avant (16), - un corps tubulaire arrière (20) ayant un axe vertical, pour la dissipation de l'énergie cinétique et thermique des balles, qui est raccordé à la chambre de déviation (11) par l'intermédiaire de la fente de sortie de balles arrière (17), - des moyens (21) de récupération automatique des balles à partir du liquide de refroidissement, - une cuve de collecte (23) pour le liquide de refroidissement (24).
PCT/EP2017/073572 2016-09-29 2017-09-19 Écran métallique pour champs de tir Ceased WO2018059999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000097550 2016-09-29
IT102016000097550A IT201600097550A1 (it) 2016-09-29 2016-09-29 Para-proiettili per poligoni di tiro

Publications (1)

Publication Number Publication Date
WO2018059999A1 true WO2018059999A1 (fr) 2018-04-05

Family

ID=57909995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/073572 Ceased WO2018059999A1 (fr) 2016-09-29 2017-09-19 Écran métallique pour champs de tir

Country Status (2)

Country Link
IT (1) IT201600097550A1 (fr)
WO (1) WO2018059999A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191400954A (en) * 1914-01-13 1914-08-27 Thomas Macready Down Improvements in Target-screens for Cinematograph Shooting Ranges.
US4126311A (en) * 1977-01-27 1978-11-21 Wagoner Lewis R Bullet trap
US5121671A (en) * 1990-12-14 1992-06-16 Passive Bullet Traps Limited Bullet trap
WO1995014206A1 (fr) * 1993-11-17 1995-05-26 Ronald Coburn Piege a balles
WO2005074651A2 (fr) * 2004-01-30 2005-08-18 Solucorp Industries, Ltd. Biorestauration de metaux lourds dans des systemes de recuperation de munitions et des champs de tir
US20090096173A1 (en) * 2001-12-12 2009-04-16 Kyle Bateman Bullet trap

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191400954A (en) * 1914-01-13 1914-08-27 Thomas Macready Down Improvements in Target-screens for Cinematograph Shooting Ranges.
US4126311A (en) * 1977-01-27 1978-11-21 Wagoner Lewis R Bullet trap
US5121671A (en) * 1990-12-14 1992-06-16 Passive Bullet Traps Limited Bullet trap
WO1995014206A1 (fr) * 1993-11-17 1995-05-26 Ronald Coburn Piege a balles
US20090096173A1 (en) * 2001-12-12 2009-04-16 Kyle Bateman Bullet trap
WO2005074651A2 (fr) * 2004-01-30 2005-08-18 Solucorp Industries, Ltd. Biorestauration de metaux lourds dans des systemes de recuperation de munitions et des champs de tir

Also Published As

Publication number Publication date
IT201600097550A1 (it) 2018-03-29

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