SU952357A1 - Atomizer - Google Patents

Description

(54) SPRAYER

one

The invention relates to a device for spraying liquids, melts and can be used for painting, inhalation, conditioning, spraying plants.

Known sprayer containing a container for the material, gas distribution grid and gas supply nozzle under it 1.

The disadvantages of this device are the low degree of dispersion of the material, the possibility of returning the formed particles to the material layer, as well as the impossibility of controlling the movement of these particles.

Closest to the proposed technical sushitelstvo and the achieved result is a sprayer containing a container for a material with a gas distribution grid and an electrode, a liquid supply nozzle and a fitting for supplying gas under the gas distribution grid 2.

The disadvantage of this device is that the shape of the plume of the resulting electrical aerosol and its speed depend on the distance to the nearest grounded object, its configuration and size, which

does not allow the coating to be applied, for example, in the form of a narrow strip or a circle of small diameter, or forces the use of templates, i.e. unnecessarily increase the cost of the applied material and clean the template.

In addition, when using such a spray gun, it is necessary to apply a high voltage either to a liquid or to a product. In the first case, the continuous supply of liquid (electrically conductive or weakly conductive) to the capacitor becomes impossible, as energy will leak and there is a danger of electrical shock to the staff. Applying voltage to a product is associated with the difficulty of isolating it from the conveyor and with the need to install sliding clocks, which, due to the sparking, will quickly go out of order.

The purpose of the invention is to provide the ability to control the electrospray torch.

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Claims (2)

To achieve this goal, a nebulizer containing a container for a material with a gas distribution grid and an electrode, a liquid supply nozzle and a gas supply nozzle for the gas distribution grid. it is equipped with a central tube fixed on the bottom inside the tank with a bellows and a gas supply nozzle at the lower end and installed with a gap inside the tube with the possibility of longitudinal movement with a nozzle at the upper end connected through a high-voltage source regulating device. In addition, the brush is made in the form of high-voltage resistance, covered with a layer of electrically insulating material, and the nozzle is mounted on the rod with the possibility of removal. The drawing shows a diagram of the device. The atomizer contains a container 1 for a material with a gas distribution grid 2 and an annular electrode 3. The container 1 contains supply pipes 4 and a liquid outlet 5 and a gas supply valve 6 for gas distribution under the gas distribution grid 2. The atomizer is equipped with a sylphon 8 fixed to the bottom inside the container 1 and 8 9 gas supply at its lower end and installed with a gap inside the tube 7 with the possibility of longitudinal movement of the rod 10 with the nozzle 11 at the upper end. The rod 10 is connected via a regulating device 12 to a high-voltage source 13. The rod is made in the form of a high-voltage resistance coated with a layer of electrical insulating material. The nozzle 11 is mounted on the brush with the possibility of removal, which allows you to install the nozzles of various configurations (tapered, elliptic, shchi-shaped, drop-shaped). A micrometric screw 14 is provided for adjusting the position of the stem 10. A bellows 8 is needed to eliminate gas leakage and to allow movement of the brush 10. The device operates as follows. Spray liquid is supplied to tank 1, gas flow is opened through valve 6, then flow is blown out. gas through pipe 9 and include high voltage. Depending on what kind of electro-aerosol plume is needed (converging or diverging), the potentials 10 and the annular electrode 3 are respectively supplied to the liquid either of the same or similar potentials. Adjusting the potential difference (either voltage regulators or stem positions) changes the diameter of the torch. The gas velocity at the outlet of the tube 7 is set so that the electric aerosol does not settle on the rod 10 and the nozzle 11. The latter is selected in such a configuration in order to give the torch the necessary shape. When a bubbling gas is introduced into the liquid, bubbling bubbles form, which, when destroyed on the surface of the liquid, form tiny droplets. Induced by an electric field on the surface of the liquid, the charge ensures the charge of the formed droplets, and the Coulomb interaction sets them in motion, creating a flow of charged aerosol. The flow rate and shape of the plume are determined by the intensity of the electric field, its configuration and the gas flow rate from the tube. An electrode 3 placed in a liquid can be grounded, and a high voltage is applied to the brush 10 (this will provide an opportunity to continuously supply liquid to the column and provide electrical safety). In this case, the drops formed during sparging will acquire an induced charge, and the gas flow from the tube will prevent the droplets from falling on the rod and transfer them to a grounded part, where they will be deposited due to electrical reflection forces. The proposed nebulizer makes it possible to obtain an effectively charged aerosol to easily control its speed, concentration, charge and shape of the plume. The use of such sprayers for applying protective and decorative coatings will significantly save the consumption of materials used. Claim 1. Sprayer containing a container for a material with a gas distribution grid and an electrode, a liquid supply nozzle and a gas supply nozzle for the gas distribution grid, characterized by bellows and gas supply pipe at its lower end and installed with a gap inside the tube with the possibility of longitudinal movement of the rod with a nozzle at the upper end of the connected h Through a regulating device with a high-voltage source. 2. Sprayer according to Claim 1, characterized in that the rod is made in the form of a high-voltage resistance, covered with a layer of electrically insulating material, and the nozzle is mounted on the rod with the possibility of removal. Sources of information taken into account during the examination 1. USSR author's certificate No. 483091, cl. A 01 G 31/02, 1973. 2. USSR author's certificate No. 651852, cl. B 05 B 5/8, 1977 (prototype).