Abstract:
A waterjet cutting head assembly (12) is provided which includes an orifice unit (14) to generate a high-pressure waterjet, a nozzle body (16) and a nozzle component (20) coupled to the nozzle body (16) with the orifice unit (14) positioned therebetween. The nozzle component (20) may include a waterjet passage (44), at least one jet alteration passage (50) and at least one environment control passage (60). The jet alteration passage (50) may intersect with the waterjet passage (44) to enable selective alteration of the waterjet during operation via the introduction of a secondary fluid or abrasive media or application of a vacuum. The environment control passage (60) may include one or more downstream portions (62) aligned relative to a fluid jet passage (36) so that gas passed through the environment control passage (60) during operation is directed to impinge on an exposed surface of a workpiece at or adjacent to a location where the waterjet is cutting the workpiece. Other high-pressure waterjet cutting systems, components and related methods are also provided.
Abstract:
An abrasive cutting head assembly includes a generally annular gland between the cutting head and extension tube which has a first region of screw threads having a first lead that engages the threads of the extension tube, and a second region of screw threads having a second and different lead that engages the screw threads of the abrasivejet cutting head. By rotating the gland and cutting head with respect to the extension tube and by rotating the gland with respect to the cutting head, the position of the abrasive inlet hole in the cutting head body can be rotationally positioned as desired so that the abrasive feed tubing has an unobstructed path to the abrasive hopper while the risk of kinking is minimizing.
Abstract:
A jet receiving receptacle is provided which is coupleable to a high-pressure fluid jet system opposite a nozzle thereof to receive a fluid jet discharged from the nozzle after it acts on a workpiece. The jet receiving receptacle may include an elongated inlet alignable with a direction of travel of the nozzle to receive the fluid jet in a deflected state. The jet receiving receptacle may further include a jet deflection device positioned downstream of the elongated inlet to redirect at least a portion of the fluid jet and a jet rebound device located upstream of the jet deflection device to be impinged on by the redirected portion of the fluid jet. The jet deflection device and jet rebound device may form, in combination with a housing, a device to trap the fluid jet. Fluid jet cutting systems incorporating a jet receiving receptacle and related methods are also provided.
Abstract:
The invention relates to a method for generating a mixed jet including frozen particles, in particular CO2 particles and a carrier gas comprising the steps: introducing a liquefied gas into an expansion cavity for generating a flow of agglomerated frozen particles from the liquefied gas; supplying the flow of agglomerated particles and a carrier gas flow to an acceleration nozzle for generating and accelerating a mixed gas jet including the frozen particles and the carrier gas. The following method alternatives are proposed to prevent particle agglomerations: lowering the pressure dew point, heating a wall of the expansion cavity and/or of the acceleration nozzle and/or introducing an additional gas flow in the form of an additional gas for increasing and/or controlling the flow velocity in the interior of the expansion cavity.
Abstract:
Dispositif pour la décontamination de surfaces, au moyen d 'un jet composé d'air sous pression, d'une matière de projection à grains fins et d'un liquide, ledit dispositif comprenant un châssis (102), un premier réservoir (107) apte à stocker un liquide mis sous-pression par une pompe (203 ), un deuxième réservoir (104 ) apte à stocker une matière de projection à grains fins mis sous pression par un dispositif de compression d'air (202), un moteur (201), des moyens de projection (301, 306), des moyens de refroidissement (206, 207, 208), un alternateur (204), des moyens de stockage d'énergie aptes à alimenter le dispositif en énergie (205) et des moyens de liaison (302, 303, 304) aptes à lier les moyens de projection avec le premier et le deuxième réservoir.
Abstract:
The air gun comprises a substantially cylindrical-shaped external case (2), provided at one end with a connection element (8) suitable to enable the connection of the air gun (1) with a device for supplying a fluid to be sprayed, and provided at the opposite end with an expulsion device (10) suitable to enable the outlet of the fluid to be sprayed towards the outside. Inside the case (2) is arranged a vortex generator device (9) provided with a plurality of internal walls (91 ) having curvilinear profiles. The walls (91 ) define a plurality of separated helical pipes (93), in order to give the fluid to be sprayed a helical rotatory motion.
Abstract:
Heating and cleaning apparatus for the cleaning and heat-treatment of surfaces, items, joints, cracks and similar by the use of a hot blast jet produced by the exhaust jet of a jet engine where aggregate injectors have been added in the engine housing for the admixture of a cleaning medium such as sand, granulate material or fluid. An apparatus for heating and cleaning in accordance with Figure A displays a lightweight jet engine under an engine housing (2), with an aggregate injector that can dose a cleaning medium admitted into the hot exhaust jet which is discharged through an exhaust nozzle (1) pointed at the item to be treated. The engine is electronically controlled by a device (4) and advanced on a lightweight frame (5) that can be fitted with a ballast weight (9) and spacer wheels (10), or the device can be mounted on an advancing arrangement (8). The jet engine is powered by liquid fuel supplied from a tank (6). Intake air is cleaned and sound-damped in a filter unit (3), and the combustion takes place at high pressure and is discharged in a high- velocity exhaust jet to which admixture of media fed from a tank (7) can be made.
Abstract:
A processing apparatus is provided to process a workpiece. The processing apparatus can have a low-profile nozzle system capable of navigating through spaces in order to process target regions with relatively small clearances. A fluid jet outputted from the nozzle system is used to cut, mill, or otherwise process the target region of the workpiece