Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
  • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
  • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
  • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads

Definitions

• the present invention relates to a nozzle device for a high-pressure liquid jet, for use in a device by means of which materials can be removed, roughened or cleaned.
• Such devices are used in particular in civil engineering and in tunnel construction. Here they are used, for example, when renovating concrete structures. Damage to the concrete structures erected in earlier decades, such as bridges and viaducts, is becoming increasingly evident, which would require renovation, since otherwise they would even have to be demolished and rebuilt after some time. For this purpose, the outer damaged concrete layer must be removed and, if necessary, the iron reinforcement exposed and freed from rust in order to be able to apply a new concrete layer or a new concrete covering.
• breakers were used first.
• the iron reinforcement was then cleaned of rust by sandblasting. This way of working has some serious disadvantages. On the one hand, the workload is very large. On the other hand, only a qualitatively inadequate result can be achieved with the breakup carried out in this way, especially as a result of the blows and vibrations damaging the iron reinforcement and the solid Concrete are almost inevitable.
• the water nozzle stops briefly at the end of its transverse movement before it moves back again. In the course of this transverse movement, the water nozzle is also set in a pendulum motion at right angles to it.
• regular holes are repeatedly shot in the concrete.
• the aforementioned oscillation of the nozzle also leads to an uneven removal, since as a result the nozzle head is not constantly at the same distance from the material surface to be processed. This is smaller in the middle of the pedal movement than at the two ends. Due to these disadvantages, it is often hardly possible to apply the new concrete layer in a satisfactory manner, with the closure of any holes.
• the object of the invention is therefore to create a nozzle device which does not have the disadvantages of the known nozzle devices.
• the nozzle device according to the invention corresponds to the characterizing features in patent claim 1.
• the flow channel of the nozzle is advantageously angled and the rotatably mounted nozzle body can be set into a repetitive partial rotary movement by means of lifting movements of a toothed rack by means of a toothed ring around it.
• the nozzle body should be able to be set into a rotation superimposing the partial rotary movement.
• the nozzle head is always kept at the same distance from the material surface to be processed and the high-pressure liquid jet never comes to a standstill, extremely uniform removal is guaranteed. Thanks to the nozzle device according to the invention, the iron reinforcement can also be completely exposed and derusted.
• FIG. 3 shows a side view of the drive of the nozzle according to FIG. 2.
• the nozzle 1 consists of a nozzle body 2 which is rotatably mounted in a housing 3 with low friction about its longitudinal axis.
• the flow channel 4 is compensate ⁇ angles in the range of the nozzle head 5 to 30 *.
• the nozzle 1 can be connected to a line coming from a high-pressure pump.
• the housing 3 has a lateral opening 7 through which a toothed ring 8 leading around the nozzle body 2 is accessible from the outside.
• the nozzle 1 is driven by a motor 9, for example an electric motor.
• the motor 9 is connected to an eccentric 10 which swings about the axis of rotation of the motor 9 and has a reciprocating movement on a rack 11 coupled to it, i.e. a lifting movement, as is indicated in FIG. 2 by dashed lines at 12.
• the toothed rack 11 engages on the ring gear 8 on the circumference of the nozzle body 2 and, by means of its lifting movements, sets it in a repeating partial rotary movement. Because of the angled flow channel 4 on the nozzle head 5, the emerging liquid jet carries out a repetitive, arc-shaped pivoting movement.
• the essentially of the engine 9, the eccentric 10 and the Rack 11 existing drive can be moved as a whole along guide rails 13 and connected to a cylinder 14. Thanks to this cylinder 14, the nozzle 1 can be set into a rotation that overlaps the partial rotary movement. This is done by the cylinder 14 indirectly displacing the toothed rack 11 longitudinally as it continues to carry out its lifting movements, as is indicated by dashed lines in FIG. 2 with 15. The nozzle 1 can thus be rotated about its axis while it continues to perform its repetitive movements. As a result, the direction of the emerging liquid jet can be changed.
• the nozzle device described above is intended in particular for installation in a suitable device for removing concrete. It is expedient to work with water which is brought to a pressure of approximately 1,200 bar by a high-pressure pump.
• the nozzle device can now be controlled so that a predetermined concrete surface is traversed.
• the nozzle 1 is first moved in a straight line along one side of the rectangular concrete surface to be machined, which performs rapid arc-shaped pivoting movements.
• the high-pressure liquid jet impinging on the concrete surface draws to a certain extent arcs which are connected to one another at one end in the form of a zigzag line.
• the nozzle 1 When the nozzle 1 has reached the end of said side, it is controlled so that it pivots on a line that runs parallel to the first line and moves back in the opposite direction. This will be so long repeated until the entire concrete surface was traversed in a loop.
• the described rotation of the nozzle 1 by means of the cylinder 14 acting indirectly on the toothed rack 11 serves to rotate the nozzle 1 by 180 ° while it is turning at the ends of the loops.
• the nozzle 1 travels line by line.
• This method of operation ensures that the high-pressure liquid jet never stops. This avoids the risk of holes in the concrete that are difficult to close.
• the nozzle 1 also moves in always constant distance from the concrete surface and thus ensures a uniform Ab ⁇ support. Since the liquid jet is also bent by 30 *, it can be below the iron reinforcement and completely expose and remove any concrete residue and rust.

Landscapes

• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Nozzles (AREA)
• Cleaning By Liquid Or Steam (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4199917

Family Applications (1)

Country Status (5)

Families Citing this family (12)

Family Cites Families (10)

• 1989
  • 1989-04-27 CH CH991/89A patent/CH677076A5/de not_active IP Right Cessation
• 1990
  • 1990-03-12 JP JP2503862A patent/JPH03505544A/ja active Pending
  • 1990-03-12 WO PCT/CH1990/000061 patent/WO1990011134A1/de not_active Application Discontinuation
  • 1990-03-12 EP EP90903749A patent/EP0417222A1/de not_active Withdrawn
  • 1990-03-12 US US07/598,649 patent/US5203842A/en not_active Expired - Fee Related

Non-Patent Citations (1)

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