Nozzle for water, in particular for a water cannon

Abstract

A full jet nozzle for use with a water cannon, the nozzle having a body that encloses a flow channel running along an axial direction, having an outlet opening provided at an axial end of the flow channel, which has an external circumference which encloses an outlet surface to form a flow cross-section. The flow cross-section has a substantially circular or annular base area. There is at least one radial cross-sectional extension of the outlet area is provided exclusively in an angular range of the outer circumference of a maximum of 180. The full jet nozzle also has at least one radial cross-sectional extension formed by a slot running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area or has a recess running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area.

Claims

1. In a water cannon, a full jet nozzle, comprising: a body having a flow channel running along an axial direction having an outlet opening provided at an axial end of the flow channel which has an external circumference which encloses an outlet surface to form a flow cross-section and an inlet opening provided at an end opposite to the axial end of the flow channel, the inlet opening configured to receive and operate at a water pressure sufficient for use as a water cannon, the flow cross-section having an at least substantially circular base area, the flow channel has an upstream axial section and a downstream axial section that includes the outlet opening; at least one radial cross-sectional extension of the outlet opening is provided exclusively in an angular range of the external circumference, the angular range being a maximum of 180, and the angular range extends along a lower half of the external circumference; and wherein the at least one radial cross-sectional extension includes a slot running with a longitudinal axis parallel to the axial direction of the flow channel, which opens perpendicular to the base area or a recess running with its longitudinal axis parallel to the axial direction of the flow channel, which opens perpendicular to the base area, the slot or the recess only extends along the downstream axial section, wherein the flow cross-section and the at least one radial cross-sectional extension together are configured for providing a jet of the water cannon with a throwing range and a cooling of an area underneath the jet.

2. The full jet nozzle of claim 1, wherein the angular range is a maximum of 90.

3. The full jet nozzle of claim 1, wherein a single radial cross-sectional extension is provided in the angular range.

4. The full jet nozzle of claim 1, further comprising a multipart nozzle body having parts which are adjustable relative to one another in order to bring into a position above the base area an axial end section in which the outlet opening is provided, wherein the multipart nozzle body includes an adjoining axial section which can be turned in order to adjust through the angular range of the external circumference with the at least one radial cross-sectional extension about an axis of rotation perpendicular to the outlet surface.

5. The full jet nozzle claim 1, wherein the at least one radial cross-sectional extension forms a flow cross-section which is a maximum of 25% of the base area.

6. The full jet nozzle claim 5, wherein the at least one radial cross-sectional extension forms a flow cross-section which is a maximum of 20% of the base area.

7. The full jet nozzle claim 6, wherein the at least one radial cross-sectional extension forms a flow cross-section which is a maximum of 10% of the base area.

8. The full jet nozzle of claim 1, wherein the radial cross-sectional extension is substantially triangular.

9. The full jet nozzle of claim 1, wherein at least one of a last axial section of the flow channel in a flow direction is mirror-symmetrical along a vertical plane running through a central axis of the flow channel and the full jet nozzle or at least the flow-guiding parts of the same is/are mirror-symmetrical to the vertical plane.

10. The full jet nozzle of claim 1, wherein the water pressure is approximately 8 bar.

11. The full jet nozzle of claim 1, wherein the upstream axial section includes a first length and a first diameter and the downstream axial section includes a second length which is less than the first length and a second diameter which is less than the first diameter, and the slot or the recess extends along the second length of the downstream axial section of the flow channel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:

(2) FIG. 1 is a perspective view of an exemplary design of a full jet nozzle according to an embodiment of the present invention;

(3) FIG. 2 is a plan view of the exit opening of the full jet nozzle of FIG. 1;

(4) FIG. 3 is a longitudinal section cut away view through the full jet nozzle of FIG. 1;

(5) FIG. 4 illustrates an embodiment of the present invention with a jet guiding profile;

(6) FIG. 5 is a plan view of the exit opening of a full jet nozzle executed according to the invention; and

(7) FIG. 6 is a plan view of the exit opening of a hollow jet nozzle executed according to another embodiment of the present invention with a trapezoidal cross-sectional extension.

(8) Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate embodiments of the invention, and such exemplifications are not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION OF THE INVENTION

(9) Referring to FIG. 1, there is shown a full jet nozzle executed according to the invention, which for example, can be mounted on an extinguishing arm, or at the end of a jet pipe, of an extinguishing vehicle or airfield extinguishing vehicle. The nozzle has an outlet opening 1 for the water jet. The outlet opening 1 is provided in the region of the axial end of the nozzle opposite to a second axial end via which water enters into the nozzle.

(10) As can be seen from FIGS. 1 and 2, the outlet opening 1 has an external circumference 2, which encloses the outlet area to form a flow cross-section 3 for the water. The flow cross-section 3 here has an at least substantially circular base area 3.1 and a radial cross-sectional extension 3.2. The total flow cross-section in the outlet opening 1 for the water includes the base area 3.1, and the radial cross-sectional extension 3.2, which could also be designated as keyhole-shaped.

(11) However, the invention is not restricted to a single radial cross-sectional extension 3.2. On the contrary, several radial cross-sectional extensions could be provided, wherein a second radial cross-sectional extension 3.2 and a third radial cross-sectional extension 3.2 are indicated schematically in FIG. 2 by dashed lines. The crucial thing however is that all the radial cross-sectional extensions 3.2, and optionally 3.2, 3.2, are only connected to the base area 3.1 in a predefined angular range 2.1 of the external circumference 2, wherein the angular range 2.1 is a maximum of 180.

(12) Preferably the angular range 2.1, as shown in FIG. 2, extends exclusively along an underside or lower half of the outlet opening 1.

(13) In the sectional view in FIG. 3, it is further shown that the full jet nozzle has a flow channel 5 extending in the axial direction 10, which opens in the outlet opening 1. A last axial section 5.1 of the flow channel 5 in the flow direction of the water through the full jet nozzle is reduced in diameter compared with a directly adjoining axial section 5.2 of the flow channel located upstream. An acceleration of the water before the exit from the outlet opening 1 and therefore a larger throwing range of the water jet is thereby achieved. The longitudinal axis 11 of the cross-sectional extension 3.2, here in the form of a recess 13, runs parallel to the axial direction 10.

(14) As can also be clearly seen from FIG. 3, the nozzle has a web 6 at the water-outlet-side end which protrudes somewhat in the axial direction with respect to an end face 7 in which the outlet opening 1 is provided and encloses the outlet opening 1.

(15) Whereas only one axial end section 8.1 of the nozzle body is shown in FIGS. 1-3, FIG. 4 furthermore shows an adjoining axial section 8.2 of the nozzle body, with respect to which the axial end section 8.1 can be twisted, in order to vary the position of the at least one radial cross-sectional extension 3.2, over the external circumference 2 of the outlet opening 1. The at least one radial cross-sectional extension 3.2 can be brought from its downwardly aligned position, into a laterally, or upwardly, aligned position in a stepped, or stepless, manner.

(16) Furthermore, it is shown as an example in FIG. 4 that a jet guiding profile 9 can be provided in the flow channel 5, in particular upstream axial section 5.2, having comparatively larger diameter, in order to reduce turbulences in the flow.

(17) The jet guiding profile 9 divides the flow channel 5 into individual circular sectors. In an exemplary embodiment, the jet guiding profile 9 further divides the flow channel 5 into a core bore, which is enclosed by circular sectors.

(18) In the exemplary embodiment of a full jet nozzle, according to the invention, shown in FIG. 5, it can again be clearly seen that the radial cross-sectional extension 3.2, which adjoins the annular base area 3.1, of the flow cross-section 3, in order to form the outlet opening 1 of the flow channel 5, is provided in the lower half 4 of the full jet nozzle. Here, also according to a particularly preferred embodiment, a single cross-sectional extension 3.2 is provided, which is connected centrally, at the bottom of the annular base area 3.1.

(19) The cross-sectional extension 3.2 is formed by a recess 13, whose longitudinal axis 11 runs parallel to the axial direction 10 of the flow channel 5. The recess 13 does not extend as far as the radially outer surface of the nozzle, or the nozzle body, here of the axial end section 8.1. However, the dashed line indicates that the cross-sectional extension 3.2 could also be guided as far as the radially outer surface of the nozzle, or the end section 8.1, then in the form of a slot 12. Advantageously the slot 12 tapers radially from inside to outside so that it approximately has the cross-section or a triangle, or at least approximately the cross-section of a trapezium.

(20) FIG. 6 shows how a cross-sectional extension 3.2 in the form of a recess 13 having a trapezoidal cross-section could appear. Here also the flow cross-section of the cross-sectional extension 3.2 tapers, in particular radially, from inside to outside.

(21) While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.

LIST OF REFERENCE NUMERALS

(22) 1 Outlet opening 2 Circumference 2.1 Angular range 3 Flow cross-section 3.1 Base area 3.2 Cross-sectional extension 4 Lower half 5 Flow channel 5.1 Last axial section 5.2 Upstream axial section 6 Web 7 End face 8.1 Axial end section 8.2 Axial section 9 Jet guiding profile 10 Axial direction 11 Longitudinal axis 12 Slot 13 Recess