DE8910907U1 - Nozzle head for a high-pressure cleaning device - Google Patents

Description

Nozzle head for a high-pressure cleaning device

The invention relates to a nozzle head according to the preamble of claim 1.

Such a nozzle is known, although there is an unsatisfactory connection between the spray tube and the nozzle.

j If a known design ,g is rcä^ich the spray tube in axia^r

The rod is inserted into the nozzle holder, which is made of a brass part, and is held in place by water pressure. To secure the axial displacement position of the nozzle body on the nozzle holder, the known design has a cross pin that passes through the two parts.

If you now want to replace the HP nozzle, you must first remove the external parts (adjustment cap) in order to get to the cross pin, so that after pulling out the cross pin you can pull the nozzle body off the internal nozzle carrier in an axial direction in order to get to the HP nozzle.

A high-pressure water nozzle with a nozzle head is known from DE-AS 28 14, where a screw connection of the nozzle carrier and nozzle holder is already provided.

A nozzle head for a high-pressure cleaning device of the type mentioned above is also known from DE-Gm 87 15 909. There, a screw connection is also provided in the area of the nozzle carrier and nozzle body, whereby after loosening the screw connection, access to the high-pressure nozzle is possible.

It Il
* I ti
I · * · ·

Jiii iiii ilia ;

• J J ill

-3a-

is created.

The present innovation is therefore based on the task of further developing a spray head of the type mentioned at the beginning in such a way that, in addition to a reliable fastening of the spray pipe in the nozzle carrier, an easy replacement of the high-pressure nozzle is guaranteed.

The technical teaching set out in claim 1 serves to solve the problem.

According to the present innovation, instead of the previously considered unsafe connection of the spray pipe with the nozzle holder, a union nut is provided which fastens the spray pipe to the nozzle holder. According to the innovation, the union nut now serves

(continued in the original documents page 4)

- 4 simultaneously attaching the nozzle body to the nozzle carrier.

If you now want to replace the HD nozzle, you only have to loosen the union nut, whereby (after removing the outer adjustment cap) you can pull the nozzle body forwards in an axial direction from the

IMItfAtvf ** Umavi &Lgr;&iacgr;&eegr;^·&Lgr;&Kgr; ^Kv-I AkAn L ***«* ***ts4 * *\ A^inA uja {+aima« si -» &agr; Ljn_rWle &agr; -»ti*-

^/fcV ^ ^ VtVt Vt WG' G ifif U^ '' U1/ LVCV IC V tf\ U 11V 1 Iff IU Ol V t^fft V^ TT^ £ ^ ^ tt J ^ TC t tv K^W ^ ^ ^ U t

Substitution becomes available.

The laborious task of knocking out a cross pin that connects the nozzle body and nozzle carrier is no longer necessary thanks to this innovation.

Since the union nut is assigned a dual function (holding the spray pipe in the nozzle body and simultaneously holding the nozzle body on the nozzle carrier), this results in a much simpler and more reliable structure.

The innovation will now be described in more detail using an example. The drawing and your Qocrhroi hiinn uiai fnv*a Ma m V ma 1 α tin A 1//\&ngr;* + α-&iacgr; 1 α /4 α &ngr;* unt« 1 iaian/lon &Ngr;&Dgr;&idiagr;&igr;&agr;&ngr;*&igr;&igr;&eegr;&eegr;

The figure shows a schematic cross-section of a nozzle head after the innovation.

A spray pipe 1, which could also be replaced by a high-pressure hose, is inserted into a connection hole 24 on the nozzle carrier 6 and is held there by a radially external union nut 2.

According to the illustration, the union nut 2 has radially inner stops which rest against associated stops on the spray tube so that the latter can no longer slip axially out of the connection bore 24 as long as the union nut 2 is fastened.

The union nut 2 has an internal thread which is screwed onto an associated external thread 3 of a nozzle body 4.

To prevent the nozzle body 4 from moving backwards towards the spray pipe, a radial stop 27 is provided between the nozzle body and the nozzle carrier 6 arranged therein.

The nozzle body 4 can therefore only move forwards in the direction of arrow 15 away from this stop 27 or in the opposite direction until it hits the stop 7.

The nozzle body 4 is at least partially surrounded in the area of its axial length by a bushing 23, which is also supported on a corresponding stop 28 of the nozzle body 4 and can therefore only be moved forwards away from this stop 28.

The nozzle body 4 is also surrounded by an adjustment cap 8, which is mounted on the nozzle body 4 so as to be secured against axial displacement via a locking mechanism 9, but is held rotatably on the nozzle body 4.

The adjustment cap 8 is used to adjust the high-pressure jet in conjunction with plate parts 21 arranged on the nozzle side.

In this case, radially eccentric slots 25 are provided in the adjustment cap 8, into which the radially outer ends of plate parts 21 engage. The plate parts 21 are mounted in a radially spring-loaded manner via spring tabs 22 on the front face of the nozzle body 4.

By turning the adjustment cap 8 accordingly, the high-pressure jet can be changed from a wide jet to a round jet.

An O-ring 7 is fitted between the nozzle body 4 and the adjustment cap 8 for sealing.

I f I

ttI

When the union nut 2 is screwed on, the front side of the union nut 2 rests against a radial shoulder 5 of the nozzle body 4 and the adjustment cap 8.

The nozzle body 4 is in the direction of arrow 15 (as previously stated) on

/Jörn Qitcnnf t-Knar &zgr; yorcrhiohhaif. 7biork rjiocor Vorirhiphljnn is- PinPn bypass channel to create so that in the high pressure jet a low pressure jet is fed in the bypass and thereby the pressure is reduced, whereby a larger quantity of water can be discharged.

According to the innovation, this is achieved by first arranging O-rings 10, 11 on the outer circumference of the nozzle holder 6 for sealing in the direction of the spray pipe, which seal against the inner circumference of the nozzle holder 4.

The connection bore 24 in the nozzle carrier opens into a channel 12 which has transverse bores 14 at its end.

Dip Oiiprhnhriinopn ld &sfgr;-inri in DiicpntrSnpr fi anapnrdnet and mijndo" in

an annular bypass channel 13 on the inner circumference of the nozzle body 4.

In the position shown of the nozzle body 4 in relation to the nozzle carrier 6, only a high-pressure jet is emitted, because the high-pressure water in the channel 12 is only emitted via the high-pressure nozzle 18 into the orifice 20 of the nozzle head. In the area of this orifice, the jet can still be changed by manipulating the plate parts 21 with the help of adjusting the adjustment plate 8.

If a low-pressure jet is to be emitted, the nozzle body 4 is moved axially forward in the direction of arrow 15, whereby the bypass channel is still connected to the cross hole 14 of the nozzle carrier 6, but on the other hand the sealing ring 17 is bridged and the water in the bypass channel 13 is

I I ) I

>> 1 t t I

) I I I I I » » 1

ttI
The is

another bypass channel 16 downstream of the high pressure nozzle into the channel section 19.

Replacing the HD nozzle 18 is now very easy.

First, the union nut must be loosened, whereby the thread 3 is disengaged. Now the complete assembly position 4, 8, 23, 21, 22 can be pulled off downstream from the nozzle carrier 6.

The HP nozzle 18 is thus exposed because it is only held in a mounting hole 26 on the front side of the jet fighter 6.

In the operating state, it is supported only in the area of the bypass channel 16 on the inside of the nozzle body 4.

This ensures that the HD nozzle can be easily replaced.

The union nut is moved in the direction of arrow 29 and remains on the spray tube 1.

tree· fi · «

it ( Cffl«

4 nozzle bodies

5 paragraph

6 nozzle carriers

7 O-ring

8 Adjustment cap

9 Detent

10 G-Ri nc,

11 O-ring

12 channel

13 Bypass channel

14 Cross hole

15 Arrow direction

16 Bypass channel

17 D1entring

18 HD nozzle

19 Canal section

20 mouth

21 Plate part

22 Spring rag

23 socket

24 Connection hole

25 Slot

26 Mounting hole

27 stop

28 stop

29 Arrow direction

• t « 1 IL

DRAWING LEGEND 1 Spray tube

Claims (3)

• · J &ogr; . a i . , , official reference number: G 89 10 907.4 2905.0-0452/22-ka Applicant: WAP Reinigungssysteme GmbH & Co. 20 February 1990 New protection claims 1. Nozzle head for high-pressure cleaning devices with a connection for a spray pipe or a high-pressure hose, which can be secured to a connection bracket of the nozzle carrier, whereby an exchangeable HO nozzle is arranged in the nozzle carrier and the nozzle is surrounded on its outer circumference by a nozzle body over at least part of its axial length; the outer part _is supported by spring tabs, whereby the nozzle body is in turn surrounded by a B-axis on which a reinforcement cap (3) is arranged, thereby preventing a radial extension of the nozzle. e &tgr; that the spray pipe ' ^ry or the HP hose is fastened in the receiving bore (24) of the nozzle carrier (6) with a union nut (2) which is screwed with its internal thread onto an associated external thread (3) of the nozzle body (4) and that the nozzle body (4) is guided on the nozzle carrier (6) so as to be displaceable in the axial direction, wherein the adjustment cap (8) is rotatably mounted on the nozzle body (4) via a locking connection (9) secured against axial displacement. 2. Nozzle head according to claim 1, d a t i o n characterized in that transverse bores (14) are arranged in the nozzle carrier (6) and can be brought into flow connection with a radially inner bypass channel (13) in the nozzle body (4) and that the bypass channel (13) opens into the mouth (20) of the nozzle head downstream of the HP nozzle (18). 3. Nozzle head according to claim 1 or claim 2, characterized in that the HD nozzle (18) is arranged in a frontally open receiving bore (26) of the nozzle carrier (6) ¹ 11) 1 1 j , , • · ■> 1 ■ I ■>>■ I ¹ ■ 111 11> -2- is arranged and is supported with its front end on the inner circumference (bypass channel 16) of the nozzle body (4).