RU1776206C - Liquid solution sprayer - Google Patents

Abstract

Usage: in the pulp and paper industry for spraying liquid solutions of chemicals and adhesives onto a paperboard web. SUMMARY OF THE INVENTION: the inlet of the housing is offset with respect to the axis of the housing by an amount selected equal to 1/10 of the diameter of the receiving chamber. The length of the central channel of the swirl insert is chosen smaller than its diameter, which is chosen smaller than the diameter of the nozzle landing outlet. The screw channels are polished. Screw channels are made with a rectangular cross section. 2 z.p., f-ly, 1 ill. Yo

Description

The invention relates to a technique for spraying liquid solutions and can be used in various industries, for example in pulp and paper, for spraying liquid solutions of chemicals and adhesives onto a paperboard web.

A nozzle is known which includes a housing with an outlet nozzle and an annular chamber and a swirl insert with screw passage channels and a central passage channel, the end of which from the passage side of the sprayed liquid is cut off at an angle to the axis.

The disadvantage of this nozzle is the insufficient reliability due to the asymmetric distribution of the fluid flow and, as a result, the rapid clogging of channels located in the areas of reduced fluid flow rates, reduced productivity and violation of the spray pattern.

The closest to the invention in technical essence and the achieved result is a nozzle for spraying liquid solutions, comprising a housing with a receiving chamber and an inlet, nozzle nozzles with an outlet and a swirl insert with a central and screw channels.

The disadvantage of this nozzle is the unreliability of operation due to clogging of the screw and the central channel of the swirl-liner by the sprayed particles, since the ratio of the length of the channels and their cross-sectional area

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2 th about

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not quite right. (It is known that the closer to unity this ratio is, the less is the likelihood of clogging the channel). Moreover, the design of the swirl-liner does not allow processing of the channels with sufficient surface cleanliness, and the central channel, made at an angle, also contributes to clogging. The annular channel for collecting large particles is small, quickly fills and forms an end rough surface, which contributes to clogging of the helical channels of the swirl insert. Therefore, the presence of this channel makes no sense.

The purpose of the invention is to increase the reliability of the nozzle by preventing clogging of the passage channels of the swirl insert and creating a preliminary swirl of the fluid flow in the receiving chamber.

The goal is achieved in that the inlet of the casing is offset with respect to the axis of the casing by an amount selected equal to 1/10 of the diameter of the receiving chamber, the length of the central channel of the swirl insert is smaller than its diameter, and the latter is chosen smaller than the diameter of the nozzle nozzle outlet.

The drawing shows a General view of the nozzle.

The liquid spray nozzle comprises a housing 1 with a receiving chamber 2 and an inlet 3, a nozzle nozzle 4 with an outlet 5 and a swirl insert 6 with a central and screw channels 7 and 8 and a threaded hole 9.

The inlet 3 of the casing 1 is located offset from the axis of the casing 1 by a value chosen equal to 1/10 of the diameter of the receiving chamber 2, the length of the central channel of the swirl-liner is chosen smaller than its diameter, and the latter is chosen smaller than the diameter of the outlet 5 of the nozzle nozzle 4.

The screw channels 8 can be made polished and with a rectangular cross section, and the end surface 10 of the swirl insert 6 is made grinding.

The nozzle works as follows. Liquid under pressure enters the receiving chamber 2 of the housing 1, the opening of which is offset 1/10 in the axis of the diameter of the receiving chamber 2, due to which there is a preliminary swirl of the fluid flow, which, in combination with the smooth, polished surface 10 of the swirl-liner 6, prevents clogging of the central channel 7. For the same purpose, the length of the central channel 4 of the contributions of the sha-swirler 6 is made smaller than its diameter, and the diameter of the outlet 5 of the nozzle nozzle 4 exceeds the diameter of the central channel 7 of the swirl-liner 6. Liquid pass through grinding

screw channels 8 of the insert-swirl 6, receives an intense swirl and leaves the hole 5 of the nozzle nozzle 4 in the form of a fine torch.

The density of the middle part of the torch is provided by the central channel 7 of the swirl insert 6. The dispersion of the liquid spray is controlled by the pressure in front of the nozzle. Performance - selection of nozzle nozzle bores. The threaded hole 9 is technological and is designed to remove the swirl insert 6 from the nozzle body.

The manufacturability of the main parts of the nozzle allows to obtain

sufficiently high cleanliness of the working surfaces, which reduces the likelihood of clogging of the nozzle.

The application of the invention improves the reliability of the nozzle, reduces the cost of its manufacture and maintenance.

Claims (3)

1. Nozzle for spraying liquid solutions, comprising a housing with a receiving a chamber and an inlet, a nozzle landing with an outlet and a swirl insert with a central and screw channels, characterized in that, in order to increase the reliability in operation by preventing clogging of the passage channels of the swirl-liner and creating a preliminary swirl of the fluid flow in the receiving chamber, the inlet of the housing is displaced relative to the axis of the housing by an amount selected equal to 1/10 of the diameter of the receiving chamber, the length of the central channel of the swirl-liner is chosen smaller than its diameter, and last selected smaller the diameter of the outlet nozzle nozzle. 2. The nozzle according to claim 1, characterized in that the screw terminals are polished. 3. The nozzle according to claim 1, wherein the screw channels are made with a rectangular cross section. / // / 9867 fO