• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method for cutting a component (4) with a water-abrasive suspension jet as a cutting jet in air, the cutting jet (8) is at an angle (α), which is related to a located behind the emerging at cutting exit water surface, directed obliquely downwards against the component (4) which, after penetrating the component (4), impinges obliquely on the water surface (21) located behind the exit point (20), the water surface being below the exit point.
    公开号:CH706533B1
    申请号:CH00757/13
    申请日:2013-04-11
    公开日:2017-05-15
    发明作者:Hendrik Bruhn Jan；Käufl Theo
    申请人:Areva Gmbh；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a method for separating a component with a water-abrasive-sus-pension jet as a cutting jet in air according to claim 1.
    For the decomposition of components with a cutting method, in particular for the disassembly of a radioactively contaminated or activated component of a nuclear facility, it is known, a so-called water Abrasivmit tel suspension blasting method (WASS), hereinafter abbreviated as Abrasiv-Wasserstrahlschneiden to use, in which a suspension of water and abrasive is directed at high speed on the component. Such a blasting process can be carried out either completely under water or in air. When carried out in air, it is necessary to absorb the passing through the component and emerging from the resulting kerf with high kinetic energy cutting jet and reduce the kinetic energy transported in it or destroy it to avoid endangering the environment and the workforce. For this purpose, a collecting chamber is installed, for example, when disassembling a reactor pressure vessel on its inner side facing away from the cutting beam, which sits with its edge close to the inside, so that their interior is sealed to the outside. In the collecting chamber cascade ceramic plates are arranged, with which the kinetic energy of the cutting jet is reduced. The collecting chamber is rinsed with water during cutting in order to remove the cutting sludge settling in it. However, such a procedure is complicated because the collecting chamber must either be so large that it completely covers the cutting or parting line created during cutting or it must be implemented several times. This is associated with an interruption of the cutting process and with effort in converting and re-sealing the collecting chamber. In addition, the ceramic plates are exposed to wear, which must be checked and requires maintenance.
    The invention is therefore based on the object to provide a method for disassembling a component with an abrasive water jet cutting in air, in which the required to reduce the kinetic energy of passing through the component cutting beam required technical effort is reduced.
    The object is achieved according to the invention with a method having the features of claim 1. According to this method, the cutting jet at an angle which is related to a water surface located behind the emerging at cutting exit surface, obliquely downward against the Directed component and strikes after penetrating the component obliquely on the located behind the exit point water surface, wherein the water surface is below the exit point.
    In the oblique impingement on a flat, free water surface, the kinetic energy of the cutting jet is degraded or destroyed by turbulence and friction in the water in the same manner as is the case with the abrasive water jet cutting, which is carried out under water.
    A particularly efficient destruction is achieved when the angle at which the cutting jet impinges on the water surface, based on the water surface is less than 20 °.
    The water surface can be provided in an embodiment of the invention in that behind the component filled with water, above at least partially open container is arranged such that the emerging from the component cutting jet obliquely impinges on the water surface.
    Such a separate container is no longer necessary if the component itself is a container which is filled to a below emerging during cutting exit point of emerging from the kerf in the interior of the container cutting jet with water.
    The method according to the invention is particularly suitable for disassembling a reactor pressure vessel of a nuclear power plant.
    For further explanation of the invention reference is made to the embodiments illustrated in the figures. Show it:
    1 shows an embodiment of the invention in which a container filled with water is arranged behind the component,
    Fig. 2 shows an alternative process variant in which the component itself is a container filled with water.
    1, a cutting nozzle 6 is placed on a wall surface 2 of a component 4, from which a directed against the component 4 cutting beam 8 impinges with a high kinetic energy at an angle α. The cutting jet 8 penetrates through the component 4 and exits on the opposite side of the cutting nozzle 6 of the component 4 in air. Behind the component 4, i. on the cutting nozzle 6 and the cutting beam 8 side facing away from the component 4, a container 10 is arranged, which is filled up to a water level 12 with water 14, wherein the upper edge 16 of the container 10 and the water level 12 so far below the Cutting resulting kerf 18 or below the exit point 20 of the cutting beam 8 is located from the component that the cutting beam 8 hits unimpeded at a point A on the free water surface 21 and there loses its kinetic energy through friction and turbulence. ever
    权利要求:
    Claims (5)
    [1]
    Method for cutting a component (4) with a water-abrasive suspension jet as a cutting jet in air, in which the cutting jet (8) is inclined at an angle (a) to an exit point (20) emerging from the cutting is located obliquely downward against the component (4) is directed, wherein the cutting jet (8) after passing through the component (4) obliquely incident on the behind the exit point (20) located water surface (21), wherein the water surface is below the exit point.
    [2]
    2. The method of claim 1, wherein the angle (a) is less than 20 °.
    [3]
    3. The method of claim 1 or 2, wherein behind the component (4) filled with water (14), at least partially open container (10) is arranged such that the emerging from the exit point cutting beam (8) obliquely on the Water surface (21) impinges.
    [4]
    4. The method according to claim 1 or 2, wherein the component (4) is a container which up to a below an emerging during cutting exit point (20) of the exiting into the interior of the container cutting jet (8) filled with water (14) is.
    [5]
    5. The method of claim 4, wherein the container is a reactor pressure vessel of a nuclear power plant.
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    同族专利:
    公开号 | 公开日
    CH706533A2|2013-11-29|
    DE102012208240A1|2013-11-21|
    JP2013237145A|2013-11-28|
    JP5564601B2|2014-07-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5180787U|1974-12-20|1976-06-26|
    JPH0334545B2|1984-04-26|1991-05-23|Taisei Corp|
    JPH01103265A|1987-10-13|1989-04-20|Kawasaki Heavy Ind Ltd|Water jet cutting device|
    JPH01114300U|1988-01-25|1989-08-01|
    AT97049T|1990-04-23|1993-11-15|Bystronic Laser Ag|METHOD AND SYSTEM FOR CUTTING FLAT MATERIAL.|
    JPH07124865A|1991-12-24|1995-05-16|Kawasaki Heavy Ind Ltd|Feeding method for supply of grinding material for abrasive water jet|
    JP3015713B2|1995-07-06|2000-03-06|株式会社東芝|Method and apparatus for decontamination treatment of metal waste|
    DE10051942B4|2000-10-19|2004-12-02|Peter Lisec|Method and device for cutting material plates|US9728287B2|2015-10-02|2017-08-08|Areva Inc.|Packaging for decommissioned and dismantled nuclear reactors and reactor components|
    CN111230752B|2020-02-26|2020-11-20|苏州大学|Immersed gas jet driven polishing equipment and polishing method|
    法律状态:
    2018-11-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012208240A|DE102012208240A1|2012-05-16|2012-05-16|Method for disassembling a component|
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