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    • 2. 发明授权
    • Plasma torch for transmitted arcs
    • 等离子火炬用于传输弧
    • US5340961A
    • 1994-08-23
    • US027741
    • 1993-01-08
    • Hans J. BebberHeinrich-Otto RossnerGebhard Tomalla
    • Hans J. BebberHeinrich-Otto RossnerGebhard Tomalla
    • B23K10/00H05H1/34
    • H05H1/341H05H1/34H05H2001/3457
    • Parasite arcs which occur during the operation of plasma torches have an adverse economic effect and endanger important parts of the torch. Countermeasures of the prior art are only partly effective. Equipping the annular passage between the electrode and the surrounding nozzle which carries the plasma gas with an electrically insulating lining on the inside of the nozzle provides only partial protection. To insulate the segment of the inner wall part of a water-cooled nozzle adjacent to the end wall part by means of insulating parts penetrating the wall part in question from the outer segment is very expensive and complex, depending on the design and the choice of insulation materials. The invention proposes that secondary passages be distributed uniformly between the annular passage for the plasma gas and an annular passage between the nozzle endpiece and the torch casing, uniformly over the circumference. Through these secondary passages, a portion of the plasma gas is diverted and used to cool the nozzle end area and to displace electrically conducting deposits of dusts etc. and plasma arc flashbacks. A flange which is guided so that it slides in this annular passage also acts, by means of relative movements caused by temperature, to prevent the formation of electrical bridges by contaminants.
    • 在等离子体火炬操作期间发生的寄生弧具有不利的经济效应并危及割炬的重要部分。 现有技术的对策仅部分有效。 将电极和周围喷嘴之间的环形通道装配在喷嘴内侧上带有电绝缘衬层的等离子体气体仅提供部分保护。 为了通过绝缘部件与端壁部分邻近的水冷喷嘴的内壁部分的绝缘部分从外部部分绝缘是非常昂贵和复杂的,这取决于设计和选择 保温材料。 本发明提出,二次通道在等离子气体的环形通道和喷嘴端部件与割炬套管之间的环形通道均匀分布在圆周上。 通过这些二次通道,等离子体气体的一部分被转向并用于冷却喷嘴端部区域并且移置导电的灰尘等沉积物和等离子弧回火。 被引导使得其在该环形通道中滑动的凸缘也通过由温度引起的相对运动而起作用,以防止由污染物形成电桥。
    • 3. 发明授权
    • Plasma torch with hollow fluid cooled nozzle
    • 等离子火炬与中空流体冷却喷嘴
    • US4645899A
    • 1987-02-24
    • US781136
    • 1985-09-27
    • Hans J. BebberHeinrich-Otto RossnerGebhard Tomalla
    • Hans J. BebberHeinrich-Otto RossnerGebhard Tomalla
    • H05H1/34B23K15/00
    • H05H1/34H05H2001/3436
    • In a plasma torch having an output end, the torch including an electrode having a longitudinal axis, and a generally cylindrical nozzle body surrounding, and positioned concentrically with, the electrode and the nozzle body, the nozzle body includes: a radially symmetrical, generally cylindrical inner wall spaced radially from the electrode; a radially symmetrical, generally cylindrical outer wall surrounding, and arranged concentrically with respect to, the inner wall; a front end wall located in the vicinity of the torch output end and joining together the inner and outer walls; and an electrical insulating component forming part of at least one of the inner and front end walls and extending entirely across its associated wall for electrically insulating the inner and outer walls from one another at at least one location in the vicinity of the front end wall.
    • 在具有输出端的等离子体焰炬中,所述手电筒包括具有纵向轴线的电极和围绕并与所述电极和所述喷嘴体同心地布置的大致圆柱形的喷嘴体,所述喷嘴体包括:径向对称的,大致圆柱形的 内壁与电极径向间隔开; 径向对称的,大致圆柱形的外壁,围绕内壁同心地布置; 位于火炬输出端附近并将内壁和外壁连接在一起的前端壁; 以及电绝缘部件,其形成所述内端壁和所述前端壁中的至少一个的一部分,并且完全延伸穿过其相关联的壁,用于在所述前端壁附近的至少一个位置处将所述内壁和外壁彼此电绝缘。
    • 4. 发明授权
    • Power supply for a three-phase plasma heating unit
    • 三相等离子加热装置的电源
    • US4818836A
    • 1989-04-04
    • US100768
    • 1987-09-23
    • Hans J. BebberHeinrich-Otto RossnerBernhard Espendiller
    • Hans J. BebberHeinrich-Otto RossnerBernhard Espendiller
    • H02M5/04B23K10/00G05F1/08H05H1/36B23K9/00
    • B23K10/006H05H1/36
    • A power supply for a three-phase plasma heating unit includes a three-phase transformer having a primary winding group with taps which are switched under load. The transformer also has secondary winding groups which are offset by a 60.degree. phase angle, the secondary winding groups being connected to the three-phase plasma heating unit. Converter units are also connected to the secondary winding groups. Each converter unit includes a three-phase thyristor bridge and a choke connected to the bridge. Another embodiment employs two three-phase transformers. The first transformer has a secondary winding group with taps which are switched under load. The second transformer has a primary winding group which is connected to the secondary winding group of the first transformer. The second transformer also has secondary winding groups which are offset by a 60.degree. phase angle, the secondary winding groups being connected to the three-phase plasma heating unit. Converter units, each including a three-phase thyristor bridge and a choke, are connected to the secondary winding groups.
    • 用于三相等离子体加热单元的电源包括三相变压器,其具有初级绕组组,其带有在负载下切换的抽头。 变压器还具有偏置60°相位角的次级绕组,次级绕组组连接到三相等离子体加热单元。 转换器单元也连接到次级绕组组。 每个转换器单元包括三相晶闸管桥和连接到桥的扼流圈。 另一实施例采用两个三相变压器。 第一个变压器具有次级绕组,带有在负载下切换的抽头。 第二变压器具有与第一变压器的次级绕组组连接的初级绕组组。 第二变压器还具有偏置60°相位角的次级绕组,次级绕组连接到三相等离子体加热单元。 每个包括三相晶闸管桥和扼流圈的转换器单元连接到次级绕组。
    • 6. 发明授权
    • Plasma burner and method of operation
    • 等离子燃烧器和操作方法
    • US4580031A
    • 1986-04-01
    • US636411
    • 1984-07-31
    • Hans J. BebberGebhard TomallaHeinrich-Otto Rossner
    • Hans J. BebberGebhard TomallaHeinrich-Otto Rossner
    • H05H1/26B23K10/00H05H1/32H05H1/34B23K9/00
    • H05H1/34H05H2001/3478
    • Plasma burner having a frontal face from which a plasma jet is to be projected, for producing a long initial firing arc, having first and second concentrically arranged electrodes extending perpendicularly to the frontal face, and a nozzle surrounding the electrodes, the first electrode being centrally arranged to constitute an auxiliary electrode and having a cylindrical main portion, an electrode tip at its front end and a conically tapered portion located between the main portion and the electrode tip and tapering toward the electrode tip, the second electrode being annular and surrounding the first electrode to constitute a nozzle electrode, and having a central channel composed, successively, in the direction toward the frontal face, of a first cylindrical section, a conically tapered section and a second cylindrical section smaller in diameter than the first cylindrical section, the central channel and the first electrode together forming an annular channel. The diameter of the first cylindrical section is 1.2 to 2.5 times the diameter of the cylindrical portion. The tapered portion and the tapered section each have a cone angle of 20.degree. to 80.degree.. The distance between the electrode tip and the plane of the transition between the conically tapered section and the second cylindrical section of the central channel, taken with reference to the direction in which the conically tapered portion tapers is such that the ratio of that distance to the diameter of the second cylindrical section is between -1 and +2.
    • 等离子体燃烧器具有要喷射等离子体射流的正面,用于产生长的初始点火弧,具有垂直于正面延伸的第一和第二同心布置的电极和围绕电极的喷嘴,第一电极为中心 布置成构成辅助电极并且具有圆柱形主要部分,其前端处的电极末端和位于主体部分和电极头部之间的锥形部分,并且朝向电极尖端逐渐变细,第二电极环形并围绕第一电极 电极构成喷嘴电极,并且具有沿朝向前表面的方向依次形成的第一圆柱形部分,锥形锥形部分和直径小于第一圆柱形部分的第二圆柱形部分的中心通道,中心部分 通道和第一电极一起形成环形通道。 第一圆筒部的直径是圆筒部的直径的1.2〜2.5倍。 锥形部分和锥形部分均具有20°至80°的锥角。 参考锥形锥形部分渐缩的方向,电极尖端与锥形锥形部分与中心通道的第二圆柱形部分之间的过渡平面之间的距离使得该距离与 第二圆柱形部分的直径在-1和+2之间。
    • 9. 发明授权
    • Method of controlling a temperature of a molten metal
    • 控制金属温度的方法
    • US5081640A
    • 1992-01-14
    • US522176
    • 1990-05-11
    • Hans J. BebberKarsten BrabandtBernhard Espendiller
    • Hans J. BebberKarsten BrabandtBernhard Espendiller
    • B22D41/005B22D2/00B22D11/10B22D11/11B22D46/00F27B3/28F27D11/08F27D19/00
    • B22D2/006B22D11/11
    • A method of controlling the course over time of a target temperature of a molten metal in a ladle, for example, in which the required heating power is produced by at least one plasma torch. Determination is made of the variation with time of a target temperature, the mass of an outwardly flowing melt, and a specific heat value of the melt present in the ladle. From the foregoing values there is ascertained the course of a corresponding setting signal for obtaining the heating power necessary to obtain the desired temperature course. Simultaneously and continuously the actual temperature of the melt is measured. When the actual temperature of the melt deviates from its target temperature in excess of a predetermined tolerance, the setting signal for the heating power is changed by decreasing such setting when an actual temperature exceeds the target temperature, and increasing such setting when an actual temperature is less than the target temperature.
    • 控制钢包中熔融金属的目标温度随时间变化的方法,例如通过至少一个等离子体焰炬产生所需的加热功率。 确定目标温度随着时间的变化,向外流动的熔体的质量以及存在于钢包中的熔体的比热值。 根据上述值,确定了用于获得获得期望温度进程所需的加热功率的相应设置信号的过程。 同时连续测量熔体的实际温度。 当熔体的实际温度偏离目标温度超过预定公差时,当实际温度超过目标温度时,通过减小这种设定来改变加热功率的设定信号,并且当实际温度为 小于目标温度。