EP1196248B1 - Switching nozzle for a high-pressure cleaning device - Google Patents

Abstract

A switching nozzle (1) for a high-pressure cleaning device comprising a feed (7) for a liquid and a switching body (8) which is movably mounted in the switching nozzle, whereby the switching body has several flow passages (18) leading to nozzle bodies (8) and which can be individually connected to the liquid feed (7) by the movement of said switching body (8). In order to simplify switching, one of the flow passages (18) leads to two nozzle bodies and is provided with a selector device which has a valve body (21) which is able to move freely in the flow passage, whereby a fluidic connection can be respectively sealed between the flow passage (18) and the nozzle bodies (19).

Description

The invention relates to a changeover nozzle head for a High pressure cleaning device with a liquid supply and with one movably mounted in the changeover nozzle head Switching body, which leads to several nozzle bodies Has flow passages, which by movement of the Switchable body individually connectable to the fluid supply are.

With high-pressure cleaning devices, it is desirable dispense the liquid in different jet forms, and for this purpose different nozzle bodies in Switching nozzle heads arranged, optionally with a Hydration can be associated. It is known in a rotatable switch body several parallel to the axis of rotation Provide flow passages, each to lead a nozzle body. By rotating the switch body can these flow passages optionally with a single hydration that are connected The switching body is rotated, for example by rotating part of the housing of the changeover nozzle head towards another part. Such Design works satisfactorily, but it is necessary, hand to the nozzle head for each adjustment to lay and twist parts against each other there. This is inconvenient with frequent changes (DE 87 15 909 U1).

On the other hand, switching devices are known (DE 78 13 438 U1), where the selection of different Flow passages can take place through the valve body, which are freely movable in a flow passage are and optionally in front of the flow passages can be placed and close them, so that from the multiple flow passages only one remains free while everyone else is locked. Such a switching device has the advantage that a when the high-pressure cleaning device is switched off Changeover by simply turning the entire changeover nozzle head enabled because then under the influence the valve body in the flow passage by gravity can be positioned so that after switching on of the high-pressure cleaning device certain flow passages block and release others. adversely is that such a switching device in usually on the use of two flow passages and a valve body is restricted. Although is it is theoretically possible, the number of valve bodies and increase the number of flow passages, but then the operation is very imprecise and requires highest skill.

It is an object of the invention to provide a generic changeover nozzle head to be designed so that even when providing switching from three nozzle bodies as easy as possible can be done.

This task is the beginning of a changeover nozzle head described type solved according to the invention, that one of the flow passages to two nozzle bodies leads and a selector with one in the flow passage has freely movable valve body with which each have a flow connection between the flow passage and the nozzle bodies can be closed. With such a changeover nozzle head is therefore in the movable switch body itself a selector with freely movable valve body next to a flow passage arranged without such a selection device, in this way the switch body as a whole has three nozzle bodies, optionally with the only one Hydration can be connected.

In a first position of the switch body is the Flow passage without a selector with the liquid supply connected, the liquid is then over the nozzle body associated with this flow passage issued.

In a different position of the movable switch body is the flow passage with the fluid supply connected, which has a selection device. This Selector allows it when the Liquid supply, simply by turning the changeover nozzle head due to gravity the valve body so that when you turn on the liquid supply a nozzle body of this flow passage is blocked while the other remains open. Without switching manually on the changeover nozzle head, the Users simply by briefly switching off the Liquid supply and by turning the entire changeover nozzle head between the two nozzle bodies this Select flow passage, only for the In case that the third nozzle body is required, the Switching nozzle head of the switch body can be moved.

During normal operation of a high-pressure cleaning device usually become a compact beam and a flat jet is needed while only in relative rare machining periods a nozzle body is required through which a cleaning chemical is released becomes. It is therefore advantageous to have the flow passage without dialing device with a nozzle body for chemical delivery to provide, and in the flow passage with the selection device a compact jet nozzle and use a flat fan nozzle. In normal operation, which normally accounts for 90% of the operating time, the user can then twist of the entire changeover nozzle head between the compact jet nozzle and choose a flat jet nozzle without using the changeover nozzle head have to make adjustments themselves. An adjustment is only made for the delivery of chemicals of the switching nozzle head necessary, and this occurs relatively rarely.

On the other hand, this configuration has the great advantage that the switch between flat jet nozzle and Compact jet nozzle with the help of the selection device none Effort, because there are only two choices must be chosen and because of a choice between two positions no special care is necessary.

The valve body is preferably a ball.

It is advantageous if the switch body in the switch nozzle head is rotatably supported when the flow channels and the fluid supply from the axis of rotation, respectively take the same distance and if the flow channels in the switch bodies in the circumferential direction are offset. With such a configuration, the Switch body in a conventional manner in the switch nozzle head for switching from a flow channel to twisted the other, thereby selecting can whether the flow channel with dialing device or the flow channel without a selection device with the liquid supply is connected.

It is particularly advantageous if the flow passage with a choice of a larger one Extends circumferential angle range. That is why it is, for example possible, three angular positions for the switch body to provide, in a first angular position the flow passage with no selector the fluid supply is connected in the other two In contrast, the flow passage has angular positions with dialing device. The user has this way the possibility of also selecting the two nozzle bodies the selection device by rotating the switch body on the changeover nozzle head if it has the Dialer not simply by twisting the whole Want to actuate the changeover nozzle head.

The flow passage preferably has a selection device a receiving chamber for the valve body, emerge from the channels leading to the two nozzle bodies.

According to a preferred embodiment, these are Channels rectifier used.

These rectifiers can be pieces of pipe that over enclose part of their length axially parallel guide walls.

It is advantageous if the guide walls are on the inflow side of the pipe sections about half the length extend the same.

It is also advantageous if the rectifier the entire length of the channels between the receiving chamber and take the nozzle body.

A particularly favorable embodiment results if the rectifier has a valve seat at its inflow end for the valve body arranged in the receiving chamber form. The rectifier thus takes over Multiple task, namely it forms the valve seat once on the other hand it reduces the turbulence in the flow and finally it bridges the whole Distance between the receiving chamber and the nozzle body and thus defines the nozzle body at the end of the channel. He thus forms a spacer in a holding device for the nozzle body, especially if the Rectifier is pressed into the channel.

Figur 1:

eine Vorderansicht eines Umschaltkopfes mit drei Düsenkörpern in einer ersten Schaltstellung des Umschaltkörpers;

Figur 2:

eine Ansicht ähnlich Figur 2 in einer zweiten Schaltstellung des Umschaltkörpers;

Figur 3:

eine Längsschnittansicht des Umschaltdüsenkopfes längs Linie 3-3 in Figur 1;

Figur 4:

eine Teilschnittansicht längs Linie 4-4 in Figur 1;

Figur 5:

eine Schnittansicht längs Linie 5-5 in Figur 3 und

Figur 6:

eine Schnittansicht längs Linie 6-6 in Figur 3.

The following description of preferred embodiments of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:

Figure 1:

a front view of a switch head with three nozzle bodies in a first switching position of the switch body;

Figure 2:

a view similar to Figure 2 in a second switching position of the switch body;

Figure 3:

a longitudinal sectional view of the switching nozzle head along line 3-3 in Figure 1;

Figure 4:

a partial sectional view taken along line 4-4 in Figure 1;

Figure 5:

a sectional view taken along line 5-5 in Figure 3 and

Figure 6:

3 shows 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 has a union nut 3 on a not shown in the drawing Jet pipe of a high pressure cleaning device can be screwed on.

The connecting piece 2 opens into the bottom 5 of a Pot-shaped housing 4, in this housing 4 is inserted a seal 6 covering the bottom 5, the at a distance from the central axis of the circular cylindrical Housing 4 entering the interior of the housing 4 Has feed opening 7, which in turn with the Interior of the connector 2 is connected.

In the housing 4 is from the open side Switch body 8 used the interior of the housing 4 completely filled and opposite the inner wall 8 of the housing 4 through a circumferential groove 9 inserted sealing ring 10 is sealed. The switch body 8 is rotatable in the housing 4 about its longitudinal axis and is thereby in the axial direction in the housing 4 held that one on an external thread 1 of the housing 4 screwed union nut 12 on a ring flange 13 of the switch body 8 is present (Figure 3).

On the outside of the housing 4 there is a bearing ring 14 made of plastic, on one of the housing 4 and the switch body 8 overlapping hood 15 around the Longitudinal axis of the housing 4 is rotatably mounted, this Hood 15 is by a side insertion element 16 set in the axial direction, which between the Bearing ring 14 and the nut 12 engages (Figure 4). This insertion element 16 is radial from it inserted position and then gives the Hood 15 free in the axial direction so that it from the switching nozzle head 1 can be deducted.

The plastic hood 15 encompasses a transverse wall 17 the front, non-circular part of the switch body 8 positively and thereby twists the Switching body 8 when they are on the bearing ring by hand 15 is rotated.

In the switch body 8 are 120 ° in the circumferential direction offset three flow channels 18 arranged in the on the connecting piece 2nd opposite end each a nozzle body 19 is used is. The flow channels 18 are on a circle concentric to the axis of rotation of the switch body 8 is arranged and the radius of the Distance of the feed opening 7 corresponds to the axis of rotation.

A first flow channel 18 passes through the switch body 8 along its entire length, so that this flow channel in a first position of the switch body 8 are connected directly to the feed opening 7 can, so that liquid over the connecting piece 2, the feed opening 7 and this flow channel to the corresponding nozzle body can reach. This position is shown in Figure 3.

The other two flow channels 18 open at their the connector 2 facing end in a common Receiving chamber 20, which is open to the seal 6 is and is completed by this. In this reception chamber 20 is a spherical valve body 21 recorded, which move freely in the receiving chamber 20 can.

Open into the two in the receiving chamber 20 Flow channels 18 are each a rectifier 22 used. Each rectifier 22 forms a pipe section 23, which has a valve seat at the receiving chamber end 24 forms for the spherical valve body 21. Immediately close to the valve seat 24 arranged on the inflow side in the interior of the tube piece 23, axially parallel guide walls 25, which are about extend half the length of the pipe section 23.

The plastic pipe section 23 takes the entire space of the flow channel and is on corresponding nozzle body 19 of the respective flow channel 18 on. The rectifiers 22 are in the flow channels pressed in and held in this in the press fit, so that they are simultaneously in the flow channel 18 inserted nozzle body 19 in the axial direction fix and thus take on a multiple function, namely the function of calming the turbulent Flow in the flow channel, on the other hand the function a fixation of the nozzle body and finally the function of a valve seat for the spherical Valve body 21.

Even in the completely continuous flow channel a rectifier can be used, however then has no valve seat.

When operating the changeover nozzle head 1 the switching body 8 is normally by means of Hood 15 rotated to a position in which the receiving chamber 20 is aligned with the feed opening 7, in the liquid thus supplied into the receiving chamber 20 occurs. Before adding the liquid can the valve body 21 freely in the receiving chamber 20th move so that the user by twisting the entire Switching nozzle head 1 can choose which of the two flow channels emerging from the receiving chamber 20 18 the spherical valve body 21 sets. If the liquid supply is now switched on, the valve body is in the selected position pressed against the corresponding valve seat 24 and closes thereby the associated flow channel, the Liquid then exits the receiving chamber through the other 20 emerging flow channel. A Switching within the receiving chamber 20 can without Adjustment of the changeover nozzle head 1 simply by this take place that the fluid supply is switched off and the entire switching nozzle head 1 is oriented so that the now freely movable valve body 21 the other valve seat 24 sets.

This is a simple way to switch between the two starting from the receiving chamber 20 Flow channels possible only because the liquid supply briefly switched off and the entire changeover nozzle head 1 is inclined differently.

Such a switchover can basically be done also achieve that the switch body 8th between the two positions in which the receiving chamber 20 is connected to the feed opening 7 is, however, the user must then take care that the switch nozzle head 1 is held so is that the flow channel to be blocked in each case is below, so that the valve body 21 under the Effect of gravity in front of this flow channel.

On the other hand, the user desires liquid via the flow channel 18 deliver the switch body 8 completely enforced and in which there is no reception chamber then this can be done by turning the switch body 8 by means of the hood 15 until the corresponding Flow channel aligned with the feed opening 7 is, as shown in Figure 3.

Claims (12)

1. A switching nozzle (1) for a high-pressure cleaning device, having a fluid supply inlet (7) and a switching body (8) mounted movably within a switching nozzle (1), which switching body has a plurality of flow passages (18) leading to nozzle bodies (19), which flow passages are individually connectable to the fluid supply inlet (7) by moving the switching body (8), characterised in that one of the flow passages (18) leads to two nozzle bodies (19) and has a selector device with a valve body (21) freely movable within the flow passage (18), with which valve body a flow connection between the flow passage (18) and the nozzle bodies (19) is closable in each case.
2. A nozzle according to Claim 1, characterised in that a nozzle body (19) for delivering chemicals is arranged within the flow passage (18) without the selector device, and a nozzle body (19) for a compact jet and a nozzle body (19) for a flat jet are arranged in the flow passages (18) with the selector device.
3. A nozzle according to Claim 1 or 2, characterised in that the valve body (21) is a sphere.
4. A nozzle according to one of the preceding claims, characterised in that the switching body (8) is mounted rotatably within the switching nozzle (1), the flow ducts (18) and the fluid supply inlet (7) are in each case equidistant from the axis of rotation, and the flow ducts (18) are offset within the switching body (8) in the circumferential direction.
5. A nozzle according to Claim 4, characterised in that the flow passage (18) with the selector device extends over a major circumferential angular region.
6. A nozzle according to one of the preceding claims, characterised in that the flow passage (18) with the selector device has a chamber (20) for accommodating the valve body (21), from which chamber ducts leading to the nozzle bodies (19) emerge.
7. A nozzle according to Claim 6, characterised in that rectifiers (22) are inserted into these ducts.
8. A nozzle according to Claim 7, characterised in that the rectifiers (22) are tube pieces (23) which enclose axially parallel conductive walls (25) over a part of their length.
9. A nozzle according to Claim 8, characterised in that the conductive walls (25) on the inlet side of the tube pieces (23) extend over roughly half the length thereof.
10. A nozzle according to Claim 8 or 9, characterised in that the rectifiers (22) take up the whole length of the ducts between the accommodating chamber (20) and the nozzle body (19).
11. A nozzle according to one of Claims 7 to 10, characterised in that the rectifiers (22) form at their inlet end a valve seat (24) for the valve body positioned within the accommodating chamber (20).
12. A nozzle according to one of Claims 7 to 11, characterised in that the rectifier (22) is held within the duct in a press fit.

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