WO2019042665A1

WO2019042665A1 - Rotary leadthrough for two media with a pressure-controlled passage

Info

Publication number: WO2019042665A1
Application number: PCT/EP2018/070106
Authority: WO
Inventors: Andreas Winter
Original assignee: Washtec Holding Gmbh
Priority date: 2017-08-28
Filing date: 2018-07-25
Publication date: 2019-03-07
Also published as: EP3676014A1; DE102017214976A1

Abstract

The invention relates to a wheel-rim and tyre washing apparatus for the leadthrough of two media through a rotatable nozzle head (2). Here, the media leadthrough is pressure-controlled and comprises the following features: • - A nozzle head (2) composed of two channels (3, 4) which run perpendicular to one another and which intersect. • - A first channel (3) which has an inlet and an outlet, a second channel (4) which has at least one outlet. • - Two media can be selectively fed to the inlet of the first channel, in each case jointly or individually. Here, one medium is at high pressure, and the other is at low pressure. • - The two inlets of the first channel comprise in each case one check valve (12). • - The outlets of the second channel comprise in each case one overpressure valve (6). • - A branch line (7) is connected to each outlet of the second channel. • - The valves (6) of the second channel are opened by the pressure of the high-pressure cleaning fluid when the latter flows into the channel (4). • - The nozzle head (2) is mounted so as to be rotatable about the axis of the first channel and is driven with a reversible direction of rotation.

Description

Rotary feedthrough for two media with a pressure controlled passage

The invention relates to a rotary feedthrough for two media, which in

Vehicle washing systems, especially in their cleaning system for tires and rims applies. Devices of this type are used to remove dirt particles on Fahrzugoberflächen.

Washing devices of the type mentioned are known. For example, reference is made to FR 2 660 661-A1. This is a

Tire washing device of a gantry washing system. The tire washing device is adjustable by an angle to the tire. It is fixed radially on a shaft which has a through hole in the longitudinal direction and rotates about it. In a cleaning process, the nozzles are arranged on the device so that in the course of the rotation largely the tire sidewall is cleaned.

Another washing device is described in US 5,853,127. These

Device is used in a vehicle washing system to clean by means of high-pressure cleaning jet hard to reach area such as the bumper, rim and boarding area. The

Washing system rotates around the through hole of a shaft. On the exit area of the through hole of the shaft, there is a reciprocally oscillating nozzle system. Further, the shaft comprises two further through-holes, offset from the central

Through hole lie and are used to carry air.

WO 02/30575 A1 describes another cleaning system that is used in a vehicle washing system for cleaning the vehicle surface. The spray system disclosed herein comprises a cylindrical body on which a plurality of nozzles are arranged. By drilling into the cylindrical body, the nozzles are each provided with a supply hose connected. A rotation of the spray system is possible around three different axes, but in each case at most 360 °.

In all the above solutions, a fluid is at least one

Cleaning jet applied to the vehicle surface.

Known tire and rim wash systems have the disadvantage of insufficient surface cleaning. Because of the persistent

Pollution like you and others by dirt particles of the

Combustion process or the brake pad wear on the

Vehicle surface and especially on the rim and tire surface arise, a pre-cleaning of these surface elements must be done.

The known tire and rim washing systems sometimes include several separate devices for cleaning the vehicle surface

perform. This is on the one hand to a nozzle system for applying a chemical mixture (rim cleaner) by means of low pressure, for pre-cleaning the coarse dirt, which is sprayed onto the vehicle surface, on the other hand to a nozzle system for removing the pre-cleaned dirt, which works by means of a high-pressure water jet.

In the relative movement between the vehicle surface and

Washing device, the chemicals containing fluid is applied only inaccurately on the target surface. This leads u.a. In addition, the aggressive and expensive wheel cleaner is also applied to unwanted areas and thus wasted.

The invention has for its object to provide a device that achieves perfect uniform cleaning of the vehicle surface with the lowest possible water, chemical and energy consumption. Furthermore, the device should be simple and inexpensive to build and trouble-free in

Be operation. This object is achieved by means of a rotary feedthrough for two media according to claim 1.

Accordingly, such a device comprises the following features:

- A nozzle head, consisting of two mutually running at an angle channels that intersect.

- A first channel having an inlet and an outlet, and a second channel having at least one outlet.

- Two media can be fed to the inlet of the first channel, either together or alone. One medium is under high pressure, the other under low pressure.

- The two inlets of the first channel each include one

Check valve.

- The outlets of the second channel each comprise a pressure relief valve.

- At each outlet of the second channel is a branch line

connected.

- The valves of the second channel are replaced by the pressure of the

High pressure cleaning fluid opened when it flows into the channel.

- The nozzle head is rotatable about the axis of the first channel

stored and driven with a reversible direction of rotation.

Depending on the required medium, this can be done by the

Transport the rotary feedthrough and apply at the channel exit to the surface to be cleaned. By means of a pressure relief valve combination, a selection of nozzles can be controlled. The system pressure applied to the respective inlet channel of the first channel determines the active nozzles. It lies one

Pressure reversibility between the different sets of nozzles before. If a first medium - the high pressure water - at the inlet channel of the first channel, this flows out of all the outlets of the first and second channels. Is a second medium - the low-pressure chemistry mixture - on Inlet of the first channel, this flows out only from the central outlet of the first channel.

An advantageous embodiment of the device according to the invention is the mounting of a cleaning brush to the nozzle head, which has recesses for the branch lines. As a result, the loosened dirt in addition to the high pressure water jet, mechanically cleaned by means of the brushes.

A further advantageous embodiment of the device according to the invention is the adjustability of outlet nozzles of the individual branch lines. This makes it possible to change the angle of incidence of the fluid jets on the surfaces to be cleaned. The cleaning process thereby achieves surface elements which are not detected during a frontal spraying process. In an advantageous embodiment, the high-pressure fluid is under a pressure of 50 to 70 bar or more and the low-pressure fluid under a pressure of 5 to 10 bar.

The invention and the prior art are explained in more detail with reference to the drawings. The following is shown in detail:

Figure 1 shows a perspective view of a

Gantry washing system with vehicle to be treated, according to the

State of the art.

Figure 2 shows a perspective view of a

Gantry washing system with vehicle to be treated according to the invention.

Figure 3 shows in a perspective view of the

Rim washing device with the rotary feedthrough for two media without housing, in turn according to the invention. FIG. 4 shows the rotary feedthrough according to the invention for two media in a vertical section.

1 shows the application example of the device according to the prior art, arranged in a gantry washing system. It shows the cleaning of the tires and rims by means of the rim washer 1 1. In this case, the rim washing device 1 1 consists of two separate components, which are both attached to the housing of moving in the y direction gantry wash. The lateral, demanding part of the motor vehicle is first detected by the nozzle of the pre-cleaning device and means

Cleaning chemistry irradiated. The targeted area element detection is not given. Rather, an area is detected by the jet, which is rectangular and thus deviates from the round rim surface. Due to the parallel arrangement of the two devices, followed by the

Rinsing process.

FIG. 2 shows the application example of the invention

Device arranged in a gantry washing system. The cleaning process described in the previous paragraph changes here to the application of the chemistry in the course of the relative movement of car wash and vehicle. The cleaning process of the rim washing device 1 1 begins after a parallel positioning of those to the vehicle rim.

For this purpose, the central central nozzle shown in FIG. 3 emits, in a first step, a conical jet which wets and pre-cleans the tire and the rim with the chemistry or the rim cleaner. After a certain

Application and contact time of the chemical flow is interrupted and the supply of high pressure water in the rotary feedthrough 1 begins. The

High pressure water jet is emitted from all five nozzles. All radially arranged nozzles comprise a flat jet nozzle. The illustrated

Branch lines 7 may be combined with a brush construction (not shown here) in which the branch lines are recessed, so in addition to the high-pressure water jet, a mechanical cleaning takes place by the brushes on the rim. During this cleaning process, the rim washing device 1 1, driven by the drive element 8 rotates about the axis of rotation in the y direction. The direction of rotation can be circumferential, clockwise or counterclockwise and more than 360 °. At the same time it is possible to rotate the rim washing 1 1 to one of the coordinate axes shown in Figure 3 and / or to adjust, so that the

Cleaning process does not run parallel to the vehicle wheel. It is one

Entanglement desirable to detect the difficult to clean flanks of the rim with the cleaning jet.

FIG. 4 shows the pressure-controlled rotary feedthrough 1 for two media in vertical section. The nozzle head 2 is in drive connection with the drive element 8. These are rotatably supported by radial bearings and sealed and fixed by means of O and clamping rings against liquid leakage. The housing 9 receives the rotatable elements and allows the

Installation on the gantry washing system.

The nozzle head 2 passes through in central longitudinal direction, a first channel 3, which connects the inlet and the outlet. Four second channels 4 penetrate the nozzle head 2 in the radial direction and intersect the first channel 3. The central outlet of the first channel 3 is provided with a cone jet nozzle

completed, a pressure relief valve 6 is missing. All second channels 4 are each connected to a branch line 7, which extends the system up to the radial nozzles (not shown). The

Entry region of the first channel 3 comprises a branched connection 5 at which two system pressures may be applied: the high-pressure system (HD) at about 70 bar and the low-pressure system (ND) at about 5 to 10 bar. The spring 10 of the LP check valve 6 can be at about 0.5 bar pressure

squeeze, whereby the LP check valve 12 opens. The

Low-pressure fluid (chemistry) flows through the channels of the nozzle head 2 and exits at the central nozzle of the first channel 3. If a system pressure is applied to the HD check valve 12, the spring 10 of the HP overpressure valve 6 can be compressed. In this case, the HD fluid (water) flows through the channels of the nozzle head 2, pushing the radial

Relief valves 6, flows from the nozzles and at the same time from the central opening of the first channel. 3

The advantages of the device according to the invention can be summarized as follows:

- Combination of pre- and post-cleaning in one device.

- The entangleable arrangement of the device allows the

Cleaning hard-to-reach surface elements.

- Chemical consumption can be significantly reduced.

- The device is simple in construction, uncomplicated and reliable in operation.

The investment costs for the device are very low.

LIST OF REFERENCE NUMBERS

Rotary union

Nozzles head

first channel

second channel

branched connection

Pressure relief valve

branch line

driving element

casing

feathers

Rim washing device

check valve

Claims

Claims 1. A rotary feedthrough (1) for two media, comprising the following features: a nozzle head (2) traversed by two mutually perpendicular channels which intersect;

a first channel (3) has an inlet and an outlet, the second channel (4) has at least one outlet;

the inlet of the first channel (3) has at least two ports, one for a high-pressure fluid and the other for a low-pressure fluid, to which optionally two media can be fed, in each case together or alone;

the inlets of the two channels each have a check valve (12) and the outlets of the second channel (4) each have a

Overpressure valve (6) on;

to each outlet of the second channel (4) is a branch line (7)

connected;

the valves of the second channel (4) are opened upon opening of the high-pressure valve of the first channel (3) by the fluid;

the nozzle head (2) is rotatable about the axis of the first channel (3) and driven with reversible direction of rotation.

2. Rotary feedthrough according to claim 1, characterized in that the nozzle head (2) with a drive element (8) is in drive connection.

3. Rotary feedthrough according to claim 1 or 2, characterized in that the nozzle head (2) by a stationary housing (9) is accommodated, which rotatably supports the nozzle head (2).

4. Rotary feedthrough according to one of claims 1 to 3, characterized

in that the high-pressure fluid is under a pressure of 16-70 bar and / or the low-pressure fluid is under a pressure of 1 to 10 bar.

5. Rotary feedthrough according to one of claims 1 to 4, characterized in that the nozzle head (2) part of a

Rim washing device (11) is included and brushes.

6. Rotary feedthrough according to one of claims 1 to 5, characterized

in that the outlet nozzle of the individual branch lines (7) is perpendicular or inclined to the outer surface of the wheel.

7. Rotary feedthrough according to one of claims 1 to 6, characterized

in that the outlet of the first channel (3) is a

Full cone nozzle identifies.

8. Rotary feedthrough according to one of claims 1 to 7, characterized

characterized in that the outlet of the first channel (3) is free of a pressure relief valve (6).