RU2413581C1 - Fluid sprayer - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to spraying of fluids. Sprayer union has tapered channel to force fluid into cylindrical bore. Said bore is arranged axially symmetric with sprayer casing and smoothly changes into shaped bore aligned with it. Said shaped bore represents a Laval bore. Casing cylindrical bore accommodates cylindrical insert, a swirler, arranged axially symmetric with the casing that has outer peripheral screw-like rifled bores. Central axial rifled bore is made along the axis of said swirler, central bore rifling being made in opposite direction of rifling of aforesaid screw-like rifled bores. Said swirler is fitted the casing via elastic gaskets and pressed by union with the help of casing-union threaded joint.

EFFECT: higher quality of fluid spraying, sprayer efficiency and reduced hydraulic losses.

3 cl, 1 dwg

Description

The invention relates to techniques for spraying liquids.

The closest technical solution to the claimed object is the nozzle on.with. USSR No. 1808392, V05V 1/34, 1993, which contains a housing with a fluid supply channel, a swirl chamber and an output nozzle, an insert in the form of a truncated cone installed in the housing, with a smaller base facing the nozzle, and a multi-screw screw is made on the outer surface of the insert cutting.

A disadvantage of the known nozzle for spraying liquid is that at a high speed of rotation of the liquid, an air vortex arises in the nozzle of the nozzle, which worsens the fluid entry into the nozzle and reduces the productivity and quality of the liquid sprayed by the nozzle.

EFFECT: improved quality of liquid atomization, nozzle productivity, reduced hydraulic losses.

This is achieved by the fact that in the nozzle for spraying a fluid containing a housing, a fitting and a swirl insert coaxially located with them, an expanding channel is made in the fitting for supplying fluid to a cylindrical hole, which is made axisymmetrically to the body and smoothly passes into a figured hole coaxial with it, made in the form of a Laval nozzle, and in the cylindrical hole of the housing, axisymmetrically mounted to it, is a cylindrical swirl insert having external peripheral helical threaded channels, with Application-swirler provided with a central axial bore with a screw thread on the inner surface of the back channels cutting direction, wherein the insert-swirler installed in the housing and through a resilient gasket is urged by a threaded connection fitting body-fitting.

The drawing shows a longitudinal section of a nozzle.

The nozzle for spraying liquid consists of a housing 1 and, coaxially located with it in the upper part, a fitting 2, in which an expanding channel 3 is made for supplying liquid into a cylindrical hole 4, made axisymmetrically to the housing 1. The cylindrical hole 4 smoothly passes into, coaxial with it , a shaped hole 5 made in the form of a Laval nozzle. A cylindrical swirler insert 6 having external peripheral helical threaded channels 7 is mounted in the housing opening 4, axisymmetrically to it. A central axial hole 8 is made along the axis of the swirl insert 6 with a screw thread on the inner surface, the reverse direction of the channel cutting 7. External screw-shaped threaded channels 7 and screw cutting on the inner surface of the axial hole 8 can be performed with a variable pitch. The swirl insert 6 is installed in the housing 1 through the elastic gaskets 9 and 10 and is pressed by the fitting 2 by means of a threaded housing-fitting connection.

The nozzle for spraying liquid works as follows.

The fluid enters the housing 1 through the fluid supply channel 3 in the nozzle 2, and then into the central cylindrical hole 4. The fluid begins to swirl in the peripheral channels of the swirl insert 6, and at the same time in the internal channels of the central axial hole 8 with the opposite direction. Such a fluid flow at the outlet of the figured hole 5 in the form of a Laval nozzle is well disclosed due to centrifugal forces arising from the rotation of the liquid, and is finely dispersed inside the conical torch due to turbulent flow along the axis of the nozzle 5.

Claims (3)

1. A nozzle for spraying liquid, comprising a housing, a nozzle and an insert swirl coaxially located with them, characterized in that the nozzle has an expanding channel for supplying fluid to a cylindrical hole, which is made axisymmetrically to the body and smoothly passes into a figured hole coaxial with it, made in the form of a Laval nozzle, and in the cylindrical hole of the housing, axisymmetrically mounted to it, is a cylindrical swirl insert having external peripheral helical threaded channels, and along the axis of the insert The i-swirler has a central axial hole with a screw thread on the inner surface, the reverse direction of the cutting channels, while the swirl insert is installed in the housing through elastic gaskets and is pressed by the fitting by means of a threaded housing-fitting connection. 2. The nozzle according to claim 1, characterized in that the external screw-shaped threaded channels and screw threads on the inner surface of the axial bore of the swirl insert are made with a variable pitch. 3. The nozzle according to claim 1, characterized in that the swirl insert is made of wear-resistant material.

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