EP1123777A1 - Vorrichtung zum Entschärfen von Munition durch Wasserstrahlschneiden mit niedrigem Druck - Google Patents

Vorrichtung zum Entschärfen von Munition durch Wasserstrahlschneiden mit niedrigem Druck Download PDF

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Publication number
EP1123777A1
EP1123777A1 EP01400324A EP01400324A EP1123777A1 EP 1123777 A1 EP1123777 A1 EP 1123777A1 EP 01400324 A EP01400324 A EP 01400324A EP 01400324 A EP01400324 A EP 01400324A EP 1123777 A1 EP1123777 A1 EP 1123777A1
Authority
EP
European Patent Office
Prior art keywords
water jet
abrasive
cutting device
cutting
circular cutting
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.)
Granted
Application number
EP01400324A
Other languages
English (en)
French (fr)
Other versions
EP1123777B1 (de
Inventor
Charles Ac'h
François Jaouen
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.)
Bourgogne Hydro
Direction General pour lArmement DGA
Etat Francais
Original Assignee
Bourgogne Hydro
Direction General pour lArmement DGA
Etat Francais
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 Bourgogne Hydro, Direction General pour lArmement DGA, Etat Francais filed Critical Bourgogne Hydro
Publication of EP1123777A1 publication Critical patent/EP1123777A1/de
Application granted granted Critical
Publication of EP1123777B1 publication Critical patent/EP1123777B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary

Definitions

  • the technical sector of the present invention is that of circular cutting devices by abrasive water jet used for the neutralization of explosive devices, in particular improvised explosive devices or IEDs placed at inside a resistant enclosure.
  • US Patent 5,759,086 which describes a device for cutting parts by abrasive jet.
  • This device consists in particular of a cutting head, comprising at least two barrels, each emitting a jet.
  • One of the barrels is movable with respect to the other, so that the axes of the barrels form an angle such that the jets converge at the same cutting point.
  • the cutting head is intended to be mounted on a displacement rail.
  • This device has the disadvantage of being able to allow cutting only in a straight line.
  • the fact of doubling the impact of the jet on the same point can cause significant vibrations as well as heating of the workpiece, phenomena to be avoided when neutralizing explosive devices.
  • the object of the present invention is to remedy the drawbacks mentioned above, by proposing a circular cutting device, intended to alleviate the phenomenon of residual attachment, in order to ensure a rapid cutting time.
  • the present invention also aims to provide a circular cutting device, using a less abrasive jet pressure vis-à-vis existing devices, in order to overcome the vibration and heating phenomena encountered during cutting.
  • Another goal is, finally, to set up a circular cutting device, overcoming the risks of obstruction of the pipes and wear of the head.
  • the invention relates to a circular cutting device by abrasive water jet comprising a cutting head equipped with at least two barrels having parallel axes.
  • These guns present the peculiarity of being mounted, each of them, at distances different from the axis of the cutting head, at a gun holder chamber, surmounted by a distribution.
  • the distance gap in the location of barrels relative to the cutting head axis has a value less than or equal to the thickness of the cutting line caused by the abrasive water jet.
  • Each barrel has a mixing chamber with nozzle and an arrival of abrasive.
  • the distribution chamber is connected to a pressurized water supply. Preferably, this arrival will be fixed at a pressure lower than 200 bars.
  • This is characterized by the fact that the distribution is surmounted by an actuated needle valve, preferably by pneumatic type control, hydraulic or electric.
  • the whole system is animated of a rotational movement, preferably, using a gear motor.
  • This circular cutting device developed with several guns, placed at distances from the cutting head axis, has the advantage of reducing the cutting cycle time and performing a total cutting, without residual attachment, with the maximum warranty.
  • the circular cutting device by abrasive water jet has the advantage of being a device requiring a lower energy source than for the other devices.
  • the principle of carrying out the abrasive mixing directly in the head also has the advantage of reducing the wear of the components, and of increasing their longevity, and gives greater efficiency in drilling and cutting.
  • Another advantage lies in the use of a low pressure, less than or equal to 200 bars.
  • the use of such a pressure eliminates the vibrations induced on the explosive device and also makes it possible to reduce the total thrust force to less than 1 daN on the whole of the treated device. The risks of movement and untimely explosion are thus minimized.
  • the use of a low pressure also makes it possible to provide a lot of water and to avoid overheating due to cutting, as well as the phenomenon of sparking.
  • FIG 1 is a presentation by the vertical axis of the circular cutting device by abrasive water jet.
  • This device consists of a water distribution chamber (1) connected to a pressurized water inlet of less than 200 bar (2) and surmounted by a needle valve (3).
  • This needle valve is actuated by a pneumatic, hydraulic or electric control (4).
  • the water distribution chamber (1) is secured to a barrel holder chamber (5).
  • This chamber assembles the barrels (6), each equipped with a mixing chamber with nozzle (9) and an abrasive inlet (7).
  • the entire cutting device is rotated by a gear motor (8).
  • Figure 2 is presented an overview of the system comprising the barrel (6), the mixing chamber with nozzle (9) and the arrival of abrasive (7), as well as the water (10) allowing the mounting on the gun holder chamber (5).
  • the water supplied by the supply (2) is admitted into the distribution chamber (1) through an orifice released by the needle valve (3) actuated by the control system (4). This water arrives at a lower dynamic pressure or equal to 200 bars.
  • the water flow is established in the mixing chambers (9) and by venturi effect the polymer or abrasive type additive coming on each mixing chamber by arrivals (7).
  • This additive is sucked in and mixed with pressurized water from the chamber distribution (1).
  • the water / additive mixture under pressure comes out through the barrels (6).
  • the circular cutting operation can to start.
  • the first step is to carry out a drilling hole. Once this hole has been made, the cut circular can start, by the rotation of the head of cut, controlled by the gear motor (8). To decrease the angle of rotation, and therefore the cutting time, the head presented in Figure 1 was equipped with four guns.
  • this cutting head is the arrangement of these guns (6) on the gun holder chamber (5) to eliminate the phenomenon of residual attachment.
  • the circular cutting begins with the drilling of a hole (11) through the treated body (12). As soon as the jet of the abrasive water mixture (13) crosses the wall, the rotary movement of the cutting head begins. This rotational movement associated with the obstacle of the wall causes a deflection of the jet. The cutting is therefore not done at right, but at an angle, as shown in Figure 3b.
  • the four guns were placed two two at a different distance from the axis of the cutting head. This difference in distance has the maximum value the thickness of the cutting line caused by the water jet abrasive.
  • This offset of two of the guns compared to the two others associated with an angle of rotation of the cutting head 100 degrees, allows for circular cutting such as shown in Figure 4.
  • the abrasive water mixture jet does not pass through a initial drilling hole and the extension of the rotation of the cutting head at an angle greater than 90 degrees allows guarantee total cutting with removal of all attachments residual.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Earth Drilling (AREA)
  • Nozzles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP01400324A 2000-02-10 2001-02-09 Vorrichtung zum Entschärfen von Munition durch Wasserstrahlschneiden mit niedrigem Druck Expired - Lifetime EP1123777B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0001626 2000-02-10
FR0001626A FR2804895B1 (fr) 2000-02-10 2000-02-10 Dispositif de neutralisation d'engins explosifs par jet d'eau basse pression

Publications (2)

Publication Number Publication Date
EP1123777A1 true EP1123777A1 (de) 2001-08-16
EP1123777B1 EP1123777B1 (de) 2006-11-02

Family

ID=8846827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400324A Expired - Lifetime EP1123777B1 (de) 2000-02-10 2001-02-09 Vorrichtung zum Entschärfen von Munition durch Wasserstrahlschneiden mit niedrigem Druck

Country Status (4)

Country Link
EP (1) EP1123777B1 (de)
AT (1) ATE344119T1 (de)
DE (1) DE60124159D1 (de)
FR (1) FR2804895B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000522A2 (fr) * 2005-05-10 2007-01-04 Saint-Gobain Glass France Decoupe par jets
CN108590691A (zh) * 2018-05-31 2018-09-28 中国铁建重工集团有限公司 一种掘进机及其水射流喷头
CN109454561A (zh) * 2018-12-21 2019-03-12 兴化金孔雀实业发展有限公司 一种用于锌制品加工的去边料装置
CN110281156A (zh) * 2019-07-26 2019-09-27 南京大地水刀股份有限公司 一种超高压水和磨料同时旋转传送的旋转接头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128703A1 (de) * 1991-08-29 1993-03-04 Dietmar Dr Ing Rath Verfahren und vorrichtung zum universellen entschaerfen von munition und sprengstoffen aller art und in allen bereichen
DE9415720U1 (de) * 1994-09-29 1994-12-15 Mak System Gmbh, 24159 Kiel Vorrichtung zur Oberflächenbehandlung von Schweißnähten
US5759086A (en) * 1994-11-04 1998-06-02 Trumpf Gmbh & Co. Method and machine tool for cutting workpieces
EP0967183A1 (de) * 1998-06-25 1999-12-29 Heraeus Quarzglas GmbH & Co. KG Verfahren für die Bearbeitung eines Quarzglas-Bauteils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128703A1 (de) * 1991-08-29 1993-03-04 Dietmar Dr Ing Rath Verfahren und vorrichtung zum universellen entschaerfen von munition und sprengstoffen aller art und in allen bereichen
DE9415720U1 (de) * 1994-09-29 1994-12-15 Mak System Gmbh, 24159 Kiel Vorrichtung zur Oberflächenbehandlung von Schweißnähten
US5759086A (en) * 1994-11-04 1998-06-02 Trumpf Gmbh & Co. Method and machine tool for cutting workpieces
EP0967183A1 (de) * 1998-06-25 1999-12-29 Heraeus Quarzglas GmbH & Co. KG Verfahren für die Bearbeitung eines Quarzglas-Bauteils

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000522A2 (fr) * 2005-05-10 2007-01-04 Saint-Gobain Glass France Decoupe par jets
WO2007000522A3 (fr) * 2005-05-10 2007-04-26 Saint Gobain Decoupe par jets
CN108590691A (zh) * 2018-05-31 2018-09-28 中国铁建重工集团有限公司 一种掘进机及其水射流喷头
CN109454561A (zh) * 2018-12-21 2019-03-12 兴化金孔雀实业发展有限公司 一种用于锌制品加工的去边料装置
CN110281156A (zh) * 2019-07-26 2019-09-27 南京大地水刀股份有限公司 一种超高压水和磨料同时旋转传送的旋转接头

Also Published As

Publication number Publication date
DE60124159D1 (de) 2006-12-14
FR2804895A1 (fr) 2001-08-17
FR2804895B1 (fr) 2002-08-02
ATE344119T1 (de) 2006-11-15
EP1123777B1 (de) 2006-11-02

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