A NOZZLE

Abstract: A nozzle for tubes (8) which are provided with at least one through opening in the tube wall and which are intended to carry a fluid to be ejected through the nozzle. The nozzle includes a flat strip (1); at least one jet member (3) which includes a substantially cone-shaped indentation (4) in the strip, and a grove (6) which extends around the edge of the base of the indentation and is open towards the apex of the indentation and which is intended to receive a gasket (7), an outlet orifice (5) at the apex of the indentation; and a clamping device (2) for clamping the strip around the tube with the indentation extending into the opening of the tube and with the packing as a fluid-tight seal between the cone and the tube wall. The strip may be provided with a number of jet members (3). The groove consists of a bulge in the strip.

Description: A Nozzle The present invention refers generally to nozzles and, more particularly, to nozzles of the kind which are intended to be fixed to tubes which carry a pressurized fluid to be sprayed through the nozzle. Nozzles of this kind are known and include, in addition to a jet member, a holder for fastening the jet member in openings which are made in the wall surface of the tube. The disadvantage of these prior devices is that fo r each nozzle two components must be mounted, viz. first the holder in the wall opening and then the jet member in the holder, The present invention aims at eliminating this disadvantage and providing a nozzle where the holder and the jet member are constructed into a combined unit which is easy to mount on the fluid-carrying tube. According to an advant¬ ageous embodiment of the invention a number of jet members are constructed into a unit with the holder. The characteristic features of the invention will be seen from the attached drawings in which: Fig. 1 is a perspective view of the nozzle according to the invention, Fig. 2 is a side view of the nozzle according to Fig. 1 mounted on a fluid-carrying tube, Fig. 3 is a cross-section of a jet member, Fig. 4 is a cross-section along the line IV-IV in Fig. 2, and Fig. 5 is a front view of a tool suitable for the cleaning of a nozzle according to the invention. The nozzle according to the invention includes a flat strip 1 which is bent into cylinder shape. By means of a clamping device 2 the diameter of the strip or ring may be changed. In the wall surface of the strip there is provided a jet member 3 which includes a substantially conical indentation 4, an outlet orifice 5 made in the apex of the indentation and a bulge 6, hereinafter called a groove, surrounding the indentation for receiving a gasket 7 shown in Fig. 3. i The nozzle according to the invention is intended to be fixed to a tube 8 shown in Fig. 2 and having a through opening 9 in its wall surface. The tube carries a press- urized fluid which is to * be sprayed through the nozzle. The indentation 4 is placed in the opening 9. Before the clamping device 2 is tightened, the gasket 7 is placed in the groove 6. At the tightening of the clamping device a fluid-tight joint is formed between the indentation and the outer wall of the tube 8. In Fig. 3 the strip 1 is shown at an enlarged scale before the bending thereof into a circular form. The substantiall conical indentation 4, the base surface of which is circ¬ ular, is surrounded by the annular bulge 6 in which the gasket 1 , for example an O-ring, is to be housed. By the expression substantially conical also three-dimensional bodies others than cones are intended to be covered, for example semispheres, pyramid shapes of other wart-like shapes. The bulge 6 need not connect directly to the edge of the base surface of the indentation but may be spaced from the edge. The outlet opening 5 may be bored, milled or made in some other way in the apex of the indentation. The form of the outlet opening 5 is adapted to the desired OMPI type of stream from the nozzle. If a so-called jet stream (needle stream) is desired, a circular hole is bored in the apex of the indentation; if a flat stream is desired an elongated hole is milled. The strip 1 is preferably made from sheet steel, but also other mater¬ ials, such as for example aluminium, brass etc. are possible. Fig. 4 shows the clamping device 2 which, includes a screw 10 extending between embossed, smoothly upset portions 11 at either end of the strip. A nut 12 is screwed on to-..the free end of the screw. After tightening the nozzle on the tube 8 the exposed thread of the screw is deformed to avoid unscrewing the nut unintentionally, for example by vibrations. An important feature of the invention is that the apex of the indentation 4 has to extend through the opening 9 some distance out or up over the interior wall surface of the tube 8. Thereby the outlet opening 5 can be cleaned in a simple ' way by means of a brush, for example the brush shown in Fig. 5 which includes a tube 13 in the wall surface of which two rows of axially extending, radially projecting bristles are disposed diametrically opposite each other. According to the invention the strip 1 may be provided with more than one jet member 3. The nozzle may be used, for example, in so-called spray pipes in paper and cellulose manufacturing machines. The embodiment of the invention as described above may be modified and varied in many ways within the scope of the basic idea of the invention. OMPI

Claims: Claims 1. A nozzle for tubes (8) which are provided with at least one through opening in the tube wall and which are intended to carry a fluid to be ejected through the nozzle, characterized by a flat strip (1) , at least one jet member (3) which includes a substantially cone-shaped indentation (4) in the strip, and a groove (6) which extends around the edge of the base of the indentation and is open towards the apex of the indentation and which is intended to receive a gasket (7) , an outlet orifice (5) at the apex of the indentation, and a clamping device (2) for clamping the strip around the tube with the indent¬ ation extending into the opening of the tube and with the gasket as a fluid-tight seal between the cone and the tube wall. 2. A nozzle according to claim 1, characterized by the fact that the apex of the indentation extends some distanc above the interior wall of the tube. 3. A nozzle according to claim 1, characterized by the fact that the strip is provided with a number of jet members (3) . 4. A nozzle according to claim 3, characterized by the fact that the indentation is formed by pressing the strip 5. A nozzle according to any of the preceding claims, characterized by the fact that the substantially conical indentation is of se ispheriσal shape, pyramidal shape or some other wart-like shape. 6. A nozzle according to any of the preceding claims, characterized by the fact that the groove consists of a bulge in the strip, said bulge optionally connecting_ to or being spaced from the lower edge of the base of the indentation (4) . 7. A nozzle according to claim 6, characterized by the fact that the strip is bent into a cylindrical shape. 8. A nozzle according to claim 7, where the clamping dev¬ ice, in a manner well-known per se consists of a screw extending between portions upset outwardly at the end portions of the strip, and of a nut, characterized by the fact that the thread of the screw is deformed after mounting the nozzle on to the tube. - EAtT OMPI

Inventors: STROEM I
Applicants: NORDISKA EGOUTTEURFAB AB, STROEM I
Application year: 1980
Main classification: B05B1
IPC codes: B05B1, B05B15, D21F1, F16L41