Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
  • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
  • B05B1/1681—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, sliding valve or cock and a lift valve

Definitions

• the invention relates to a switchover nozzle head for a high-pressure cleaning device with a liquid supply and with a switchover body movably mounted in the switchover nozzle head, which has a plurality of flow passages leading to nozzle bodies, which can be individually connected to the liquid supply by moving the switchover body.
• switching devices are known (DE 78 13 438 Ul), in which the selection of different flow passages can take place through valve bodies, which are arranged in a freely movable manner in a flow passage and which can optionally be placed in front of the flow passages and close them, so that of the plurality of flow passages only one remains free at a time, while all others are locked.
• Such a switching device has the advantage that when the high-pressure cleaning device is switched off, it enables switching only by rotating the entire switching nozzle head, since under the influence of gravity the valve bodies can be positioned in the flow passage in such a way that they block certain flow passages and others after the high-pressure cleaning device is switched on release.
• This object is achieved with a changeover nozzle head of the type described in the introduction in that one of the flow passages leads to two nozzle bodies and has a selection device with a valve body which is freely movable in the flow passage and with which a flow connection between the flow passage and the nozzle bodies can be closed.
• a selector with a freely movable valve body is thus arranged in the movable changeover body itself next to a flow passage without such a selection device, the changeover body thus having a total of three nozzle bodies which can optionally be connected to the single liquid supply.
• the flow passage is connected to the liquid supply without a selection device, and the liquid is then dispensed via the nozzle body assigned to this flow passage.
• the flow passage is connected to the liquid supply, which has a selection device.
• This selection device makes it possible, when the liquid supply is switched off, to move the valve body solely by rotating the switching nozzle head due to the force of gravity, so that when the liquid supply is switched on, one nozzle body of this flow passage is blocked while the other remains open. Without manual switching on the switching nozzle head, the user can therefore simply switch off the liquid supply briefly and turn the entire switching select switching nozzle head between the two nozzle bodies of this flow passage, only in the event that the third nozzle body is required, the switching body must be moved on the switching nozzle head.
• a compact jet and a flat jet are usually mainly required, whereas a nozzle body, via which a cleaning chemical is released, is only required in relatively rare processing periods. It is therefore advantageous to provide the flow passage without a selection device with a nozzle body for the chemical delivery, and to insert a compact jet nozzle and a flat jet nozzle into the flow passage with the selection device.
• the user can then choose between the compact jet nozzle and the flat jet nozzle simply by turning the entire changeover nozzle head, without having to make any adjustments to the changeover nozzle head itself. An adjustment of the changeover nozzle head is only necessary for the delivery of chemicals, and this occurs relatively rarely.
• this configuration has the great advantage that the switch between flat jet and compact jet using the selection device makes no effort, since only two selections have to be made and since no particular care is required to choose between two positions.
• the valve body is preferably a ball. It is advantageous if the changeover body is rotatably mounted in the changeover nozzle head if the flow channels and the liquid supply are each at the same distance from the axis of rotation and if the flow channels in the changeover bodies are offset in the circumferential direction. In such an embodiment, the switching body is rotated in a manner known per se in the switching nozzle head for switching from one flow channel to the other, it thereby being possible to choose whether the flow channel with the selection device or the flow channel without the selection device is connected to the liquid supply.
• the flow passage with the selection device extends over a larger circumferential angle range. This makes it possible, for example, to provide three angular positions for the switchover body, the flow passage being connected to the liquid supply in a first angular position without a selection device, whereas the flow passage with selection device is connected in the other two angular positions. In this way, the user has the possibility of also selecting the two nozzle bodies of the selection device by rotating the changeover body on the changeover nozzle head if he does not want to actuate the selection device simply by rotating the entire changeover nozzle head.
• the flow passage with the selection device preferably has a receiving chamber for the valve body, from which channels leading to the two nozzle bodies emerge. According to a preferred embodiment, rectifiers are used in these channels.
• rectifiers can be pieces of pipe which enclose baffles parallel to the axis over part of their length.
• rectifiers take up the entire length of the channels between the receiving chamber and the nozzle body.
• a particularly favorable embodiment results if the rectifiers form a valve seat for the valve body arranged in the receiving chamber at their inflow end.
• the rectifier therefore takes over multiple tasks, namely it forms the valve seat on the one hand, on the other hand it reduces the turbulence in the flow and finally it bridges the entire distance between the receiving chamber and the nozzle body and thus fixes the nozzle body at the end of the channel. It therefore forms a spacer in a holding device for the nozzle body, in particular when the rectifier is pressed into the channel.
• Figure 1 is a front view of a switch head with three nozzle bodies in a first switch position of the switch body;
• Figure 2 is a view similar to Figure 2 in a second switching position of the switch body
• Figure 3 is a longitudinal sectional view of the changeover nozzle head along line 3-3 in Figure 1;
• Figure 4 is a partial sectional view taken along line 4-4 in Figure 1;
• Figure 5 is a sectional view taken along line 5-5 in Figure 3 and
• FIG. 6 a sectional view along line 6-6 in FIG. 3.
• the changeover nozzle head 1 shown in the drawing has a connecting piece 2 which can be screwed onto a jet pipe of a high-pressure cleaning device (not shown in the drawing) via a union nut 3.
• the connecting piece 2 opens into the bottom 5 of a pot-shaped housing 4, a gasket 6 covering the bottom 5 is inserted into this housing 4, which has a feed opening 7 entering the interior of the housing 4 at a distance from the central axis of the cylindrical housing 4, which in turn is connected to the interior of the connecting piece 2.
• a switch body 8 is inserted into the housing 4 from its open side, which completely fills the interior of the housing 4 and is sealed off from the inner wall 8 of the housing 4 by a sealing ring 10 inserted into a circumferential groove 9.
• the switching body 8 can be rotated in the housing 4 about its longitudinal axis and is held in the axial direction in the housing 4 in that a union nut 12 screwed onto an external thread 1 of the housing 4 bears against an annular flange 13 of the switching body 8 (FIG. 3).
• a plastic bearing ring 14 On the outside of the housing 4, a plastic bearing ring 14 is held, on which a hood 15 overlapping the housing 4 and the switching body 8 is rotatably mounted about the longitudinal axis of the housing 4, this hood 15 is fixed in the axial direction by a lateral insertion element 16 which engages between the bearing ring 14 and the union nut 12 ( Figure 4).
• This insertion element 16 can be pulled out radially from its inserted position and then releases the hood 15 in the axial direction, so that it can be removed from the changeover nozzle head 1.
• the hood 15 made of plastic surrounds the front, non-circular part of the switch body 8 in a form-fitting manner with a transverse wall 17 and thereby rotates the switch body 8 when it is rotated by hand on the bearing ring 15.
• three flow channels 18 are arranged offset by 120 ° in the circumferential direction from each other, into which on the connecting piece 2 opposite end of a nozzle body 19 is used.
• the flow channels 18 are located on a circle which is arranged concentrically to the axis of rotation of the switch body 8 and the radius of which corresponds to the distance of the feed opening 7 from the axis of rotation.
• a first flow channel 18 passes through the switch body 8 over its entire length, so that this flow channel can be connected directly to the supply opening 7 in a first position of the switch body 8, so that liquid via the connecting piece 2, the supply opening 7 and this flow channel to the corresponding Can reach the nozzle body. This position is shown in Figure 3.
• the two other flow channels 18 open at their end facing the connecting piece 2 into a common receiving chamber 20 which is open to the seal 6 and is closed off by this.
• a spherical valve body 21 is received, which can move freely in the receiving chamber 20.
• a rectifier 22 is inserted into each of the two flow channels 18 opening into the receiving chamber 20.
• Each rectifier 22 forms a tube piece 23, which forms a valve seat 24 for the spherical valve body 21 at the end on the receiving chamber side.
• Immediately adjacent to the valve seat 24 are axially parallel guide walls 25 which are arranged on the inflow side in the interior of the tube piece 23 and extend approximately over half the length of the tube piece 23.
• the plastic pipe section 23 takes up the entire space of the flow channel and lies against the corresponding nozzle body 19 of the respective flow channel 18.
• the rectifiers 22 are pressed into the flow channels and held in these in a press fit, so that at the same time they fix the nozzle body 19 inserted into the flow channel 18 in the axial direction and thus assume a multiple function, namely once the function of calming the turbulent flow in the flow channel change the function of fixing the nozzle body and finally the function of a valve seat for the spherical valve body 21.
• a rectifier can also be used in the completely continuous flow channel, but then has no valve seat.
• the changeover body 8 is normally rotated by means of the hood 15 into a position in which the receiving chamber 20 is aligned with the feed opening 7, in which liquid thus supplied enters the receiving chamber 20.
• the valve body 21 can move freely in the receiving chamber 20, so that the user can choose, by rotating the entire switching nozzle head 1, in front of which of the two flow channels 18 emerging from the receiving chamber 20 the spherical valve body 21 lies. If the liquid supply is now switched on, the valve body is pressed against the corresponding valve seat 24 in the position once selected and pressed. - left
• a changeover within the receiving chamber 20 can be done without adjusting the changeover nozzle head 1 simply by switching off the liquid supply and orienting the entire changeover nozzle head 1 in such a way that the valve body 21, which is now freely movable, lies in front of the other valve seat 24.
• Such a switchover can basically also be achieved in that the switchover body 8 is adjusted between the two positions in which the receiving chamber 20 is connected to the feed opening 7, however, the user must then ensure that the switchover nozzle head 1 is so is held that the flow channel to be blocked is located below, so that the valve body 21 lies under the action of gravity in front of this flow channel.

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• Nozzles (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Laser Beam Processing (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7910735

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• 1999
  • 1999-06-10 DE DE19926381A patent/DE19926381C1/de not_active Expired - Lifetime
• 2000
  • 2000-03-17 AT AT00909365T patent/ATE249888T1/de not_active IP Right Cessation
  • 2000-03-17 EP EP20000909365 patent/EP1196248B1/fr not_active Expired - Lifetime
  • 2000-03-17 WO PCT/EP2000/002408 patent/WO2000076671A1/fr active IP Right Grant
  • 2000-03-17 DK DK00909365T patent/DK1196248T3/da active

Non-Patent Citations (1)

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