SU1470343A2 - Spraying head - Google Patents

Abstract

The invention relates to a device for spraying a liquid and is intended to produce fine aerosols. The goal is to improve the quality of atomization by providing the possibility of obtaining a monodisperse uniform flow. For this, the spray head is provided with a gas inlet pipe and annular partitions installed between the conical rings at the inlet portions of the grooves to form collectors communicated with the gas inlet pipe. The odd grooves from the periphery to the center of the head communicate with the gas inlet nozzle, and the even grooves - with the liquid inlet nozzle. The cross section of the odd grooves is made decreasing downstream, and the even grooves are enlarged. The two-phase flow, moving along the grooves, twists and forms in the mixing zone a system of spiral oppositely twisted vortex cords, which increase the uniformity of the droplet medium. 1 hp f-ly, 4 ill.

Description

one

The invention relates to a device for spraying a liquid, intended to produce fine aerosols, and is an improvement of the device according to the authors. St. No. 1209305.

The purpose of the invention is to improve the quality of atomization due to the possibility of obtaining a monodisperse uniform flow.

FIG. 1 shows a spray and a head, a longitudinal section; in fig. 2 is a cross section A-A in FIG. one; in fig. 3 is a scan of section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 3

The spray head includes a housing 1 with a liquid supply nozzle 2, hermetically placed in the housing 1 and tightly adjacent to each other, conical rings 3, on the external surfaces of which grooves 4 are made, forming spray channels with the internal surfaces of adjacent rings.

The grooves 4 are inclined with respect to the forming outer surfaces, and on the inner surfaces of the rings 3

grooves 5 are made, which are oppositely inclined to the main ones and form additional spray channels with the outer surfaces of adjacent rings.

The spraying head is also provided with a gas supply nozzle 6 and annular partitions 7 installed between the conical rings 3 at the inlet portions of the grooves 4 and 5 to form manifolds 8 communicated with the gas supply nozzle 6. When this odd grooves 4 and 5 from the periphery to the center of the head communicated with the pipe 6 for supplying gas, and even - with the pipe 2 for supplying liquid.

Conical rings 3 are fixed in case 1 with screw 9.

In the housing 1 there are annular grooves 10 extending into the central cavity 11.

The annular partitions 7 are pairwise connected by radial pipes 12 and are made with outlet groms 13 located at the entrance sections of the grooves 4 and 5.

The cross-section of the therapeutic grooves 4 and 5 is made decreasing along the

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current, and even grooves 4 and 5 increase.

The spray head works as follows.

When liquid is supplied through the nozzle 2 and the gas through the nozzle 6, the latter is distributed along the annular grooves 10, the collectors 9 and enters the grooves 4 and 5 odd, counting from the periphery, the rings 3, and the liquid through the tubes 12 and the spaces between the collectors 8 11 - in the grooves 4 and 5 even, counting from the periphery, the rings 3 and the housing 1, alternating with the grooves 4 and 5 connected to the socket 6. The fluid flowing through the grooves 5 of the housing 1 (Fig. 4) is introduced into the gas flow flowing at an angle to the liquid along the grooves 4 of the first to the periphery of the ring 3 through the places with touching the adjacent grooves 4 and 5, is intensively divided into droplets and forms a two-phase flow, which, moving along the grooves 4 and 5, mutually twists in them and forms in the mixing zone a system of spiral oppositely twisted vortex cords, which increase the uniformity of the droplet medium.

When gas is supplied with supercritical pressure drop and the grooves 4 and 5 are connected to the manifold 6, expanding along the flow, they establish a supercritical flow, which intensively splits liquid jets in the crossed channels into drops. Since the sound velocity in the resulting two-phase flow is significantly lower than in a homogeneous medium, the expanding grooves 4 and 5 also serve to accelerate the two-phase flow in them.

The implementation of the grooves 4 and 5, which are connected to the liquid supply pipe 2, with a cross-section decreasing along the flow, ensures an even distribution of fluid along each of the channels connected to the pipe 6.

Claims (2)

1. Spraying head according to ed. St. No. 1209305, characterized in that, with the aim 5 increased atomization through. providing the possibility of obtaining a monodisperse uniform flow, it is equipped with a gas supply pipe and ring partitions installed between the conical rings at the inlet portions of the grooves to form collectors communicated with the gas supply pipe, while the odd grooves from the periphery to the center of the head communicate with the gas supply pipe, and even - with a pipe supplied with liquid and liquid. 2. The head of claim 1, wherein the cross section of the odd grooves is made decreasing in the direction of flow, and the even grooves are increasing. 7Z FIG. 70 1Q. 10s. eleven eight shig.g