CN2061090U

CN2061090U - High voltage electrostatic spraying equipment synergist

Info

Publication number: CN2061090U
Application number: CN 89211994
Authority: CN
Inventors: 曹国斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-29
Filing date: 1989-12-29
Publication date: 1990-08-29

Abstract

The utility model discloses a high voltage electrostatic spraying equipment synergistic device which relates to an electrostatic spraying apparatus and is a spraying device which enables the spray be electrified. The utility model is mainly composed of an air ionization chamber and an air free ion filtering chamber, the ionization chamber is a small electrode chamber composed by thick and thin wire electrodes, and the filtering chamber is a multilayer structure made by cellular material. The synergistic device has the technical purpose that the coating powder particles are charged, and the utility model has the advantages of large amount of charged current, uniform, and high polarity purity of the charged current. The deposition rate of the coating can be improved, shielding effects can be eliminated, the favorable effect of the coating of a complicated work piece can be realized, and favorable performance of the safe operation can be realized.

Description

High voltage electrostatic spraying equipment synergist

High pressure electrostatic painting equipment synergistic device relates to Elecstrostatic spraying apparatus and can make the charged injection apparatus of spraying.

Present domestic use powder spray coating device comparatively widely has high pressure electrostatic painting equipment and friction spray gun.The subject matter that the former exists is the deposition not high (＜75%) of coating, the coating atomizing is bad, pit, pin hole and cratering often appear in coating, screen effect makes the inner surface of tubular, tubular workpiece or complex part surface be difficult to spray coating, nearly 100,000 volts of high pressure on the spray gun, easy and workpiece is struck sparks, and causes the dust explosion burning, the poor stability of operation; Though the friction spray gun has overcome the shielding phenomenon that the high-pressure electrostatic spray gun exists, deposition is still not high, and a kind of friction spray gun can only use a kind of coating simultaneously, and the performance of spray gun changes with environment, and coating quality is stablized inadequately.

The design is intended to collect the length of two kinds of equipment, overcomes its shortcoming, improves the deposition of spraying equipment, eliminates sheltering a little of coating, overcomes the shielding phenomenon.

The technical scheme that realizes the design's task is: high pressure electrostatic painting equipment synergistic device is made up of air ionization chamber (2) and air free ion filtering chamber (3) two parts, an electrode cell (10) that is made of fine wire electrode (7) and crin electrode (13) is arranged in the air ionization chamber (2), one is provided with into, give vent to anger and chew (8) (12), and be positioned at the outer insulator shell (11) of electrode cell and with slightly, the A group output of the high-tension current that fine wire electrode joins (1), air free ion filtering chamber (3) is a kind of sandwich construction, the innermost layer is one to have the electrode bar (16) that is fixed on the arc-spark stand (22) and advance, give vent to anger and chew the tubular insulating barrier of (15) (21), there is the layer with holes (17) of row's aperture (20) its outside in nearly electrode bar end for one deck, what be close to layer with holes outside is microporous layers (18), outermost is an electrode layer (19) with holes, and electrode layer (19) joins with the B group output of electrode bar (16) and high voltage source (1).

Below in conjunction with accompanying drawing in detail the utility model is described in detail.

Figure one is the general structure block diagram of synergistic device;

Figure two is the structure chart of air ionization chamber;

Figure three is air free ion filtering cell structure figure;

Figure four is high-voltage power circuit figure.

Chew from the air inlet of air ionization chamber after (8) enter electrode cell (10) when air, volume of air increases suddenly, causes the air velocity that enters the electrode cell to descend suddenly, has prolonged the action time of electrode chamber internal electric field to gas molecule; The fine wire electrode of electrode chamber central authorities (7) is random, disorderly shape, force the gas that enters the electrode cell to be turbulent condition, the radius of curvature little (about 0.03-0.3mm) of while fine wire electrode, thereby between the thickness electrode, form high electric-field intensity, make the abundant ionization of the gas that flows to electrode chamber, but filtering air Central Plains charges of different polarity ion also improves airion concentration and purity, that air nozzle (12) flows out from going out, through the gas of air ionization chamber, its same polarity airion concentration＞10⁷Individual/cm³ When the coating powder in Ionized gas and the blender (4) mixes, make charges particles and charged many, polarity purity height. Enter together air free ion filtering chamber except the coating powder with electric charge, also have air free ion and air neutral molecule. The air free ion is identical with the electric charge of powder belt, but both quality differ several orders of magnitude because charged mass ratio differs greatly, therefore in same electric field deflection speed differ just big, free ion is subjected to electric field influence to be partial to different in nature electrode. The filtering chamber is a kind of sandwich construction of multilayer tool micropore, in the free ion migration process, by layer with holes (17) Aperture (20), behind the micropore of microporous layers (18), namely contact with electrode layer with holes (19) and lose electric charge and become neutral molecule, release in the air by the aperture on the electrode layer again. The charged quality of coating dust is big, deflection speed is little on the one hand, the paint particles particle diameter is much larger than the aperture of filtering chamber sandwich construction with holes on the other hand, therefore be blocked in layer wall and can not pass through poromerics, therefore under the promotion of carrier gas, move on the y direction of carrier gas along the filtering chamber, enter spray gun, the powder-gas mixture of processing through air free ion filtering chamber enters spray gun from going out air nozzle (21).

Coating powder mixes with ionized gas, makes powder particle charged many, and charged polarity purity height atomizes, and is not agglomerating, can eliminate the pit of coating; Enter spray gun after the paint particles charging, spray gun needn't be with ten thousand volts of high voltage operation, can effectively eliminate Screen theory; Paint particles is charged evenly, the amount foot, cause deposition velocity fast, and deposition height, thereby the coating yield is few, is beneficial to improve working environment also can be eliminated the danger of the dust explosion that high voltage arc causes. The gas of air free ion that has been filtering that enters spray gun, thereby can eliminate back corona phenomenon, make coating pin hole, cratering not occur, improved coating quality; The minimizing of carrier gas improves powder concn, and speed reduces, and is beneficial on the workpiece powder and increase and encircles effect.

According to coating property, improve high voltage source output power supply polarity, can change easily the thickness polarity of electrode of electrode cell, thereby change the polarity of air ion, cause the charging polarity of coating powder to change; Change simultaneously the supply voltage of high power supply, easily the charge volume of adjusting coating particulate.

Utilize this synergistic device, former high-pressure electrostatic podwer gun needn't supply high voltage, and to Workpiece painting, last powder is good, the powder utilization height, and defectives such as baking back coating free of pinholes, quality is better than the coating of high pressure electrostatic painting equipment spraying.

Embodiment:

A kind of synergistic device as shown in drawings, its two primary structure chamber and filtering chamber, be installed in the front and back of powder gas blender (4) in the high pressure electrostatic painting equipment respectively, the fine wire electrode of electrode cell is φ 0.1mm in the chamber, the crin electrode is φ 3mm, add the voltage of 9KV～10KV, same polarity gas ion concentration＞10 at two electrodes ⁷Individual/cm ³In the filtering chamber, between the electrode layer of the electrode bar of φ 3mm and 1mm aperture, add high pressure, produce the electric-field intensity of 5KV/cm, the air free ion is anisotropy electrode (19) deflection in electric field, in migration process by the aperture (20) on the layer with holes in 1-6mm aperture, enter the microporous layers that the aperture is 0.1～10 μ m, with become neutral molecule after electrode layer (19) contacts, let out the air from the aperture of electrode layer again, and the charged coating powder of particle diameter about 70 μ m stopped by poromerics and advances with air-flow, enters spray gun together.

Claims

1, a kind of high pressure electrostatic painting equipment synergistic device that improves spray efficiency, it is characterized in that forming by air free ion filtering chamber (3) two parts of free ion in the air ionization chamber (2) of ionized gas molecule and the filtering air, an electrode cell (10) that is made of fine wire electrode (7) and crin electrode (13) is arranged in the air ionization chamber (2), one be provided with turnover gas chew (8) (12) and be positioned at the outer insulator shell (11) of electrode cell (10) and with slightly, the A group output of the high-tension current that fine wire electrode joins (1), air free ion filtering chamber (3) is a kind of sandwich construction, the innermost layer is one to have the electrode bar (16) that is fixed on the arc-spark stand (22) and advance, give vent to anger and chew the tubular insulating barrier of (15) (21), its outside is one deck has row's aperture (20) in nearly electrode bar end a layer with holes (17), what be close to layer with holes (17) outside is microporous layers (18), outermost is an electrode layer (19) with holes, and electrode layer (19) and electrode bar (16) join with the B group output of high voltage source (1).