SU709184A1

SU709184A1 - Electrostatic atomizer

Info

Publication number: SU709184A1
Application number: SU772530452A
Authority: SU
Inventors: Василий Яковлевич Поздняков
Original assignee: Pozdnyakov Vasilij Ya
Priority date: 1977-10-03
Filing date: 1977-10-03
Publication date: 1980-01-15

Description

Изобретение относится к пневматическим устройствам для получения электрически заряженных частиц в газовом потоке и может быть использовано для нейтрализации электроста- 5 тических зарядов, для осаждения распыляемой жидкости на различные поверхности и т.д.The invention relates to pneumatic devices for producing electrically charged particles in a gas stream and can be used to neutralize electrostatic charges, to deposit atomized liquid on various surfaces, etc.

Известен электростатический распы-, литель,содержащий снабженный штуцером 'θ для подачи газа корпус, по оси которого размещены жидкостные сопло и втулка, входной торец которой расположен в одной плоскости с выходным торцом жидкостного сопла [1]. 15Known electrostatic spray-, die, containing a body equipped with a fitting 'θ for supplying gas, along the axis of which are placed a liquid nozzle and a sleeve, the input end of which is located in the same plane with the output end of the liquid nozzle [1]. fifteen

Недостатком этого устройства является необходимость подачи высокого напряжения к втулке для обеспечения зарядки распыляемого материала, что препятствует также его использованию 20 во взрыво- и пожароопасных условиях.The disadvantage of this device is the need to supply high voltage to the sleeve to ensure charging of the sprayed material, which also prevents its use 20 in explosive and fire hazardous conditions.

Цель изобретения - упрощение конструкции и обеспечение искробезопас^ ности за счет исключения подачи напряжения к втулке. ^5The purpose of the invention is to simplify the design and ensure intrinsic safety by eliminating the supply of voltage to the sleeve. ^ 5

Для достижения этой цели отношение разности внутреннего диаметра втулки и наружного диаметра жидкостного сопла к внутреннему' диаметру последнего составляет 4-5,5, а отношение внутрен-30 них диаметров втулки и жидкостного ^!сопла составляет 8-14.To achieve this goal, the ratio of the difference between the inner diameter of the sleeve and the outer diameter of the liquid nozzle to the inner 'diameter of the latter is 4-5.5, and the ratio of the inner-30 of them is the diameter of the sleeve and the liquid ^! the nozzle is 8-14.

На фиг.1 представлено устройство в разрезе; на фиг.2 —зависимость заряда от соотношения размеров.Figure 1 shows the device in section; figure 2 - the dependence of the charge on the aspect ratio.

Распылитель содержит корпус 1 со штуцером 2 для подачи газа; По оси корпуса. 1 установлено жидкостное сопло 3 и втулка 4, входной торец ко торой расположен в одной плоскости с выходным торцом жидкостного сопла 3.The sprayer includes a housing 1 with a fitting 2 for supplying gas; Along the axis of the body. 1, a liquid nozzle 3 and a sleeve 4 are installed, the inlet end of which is located in the same plane as the outlet end of the liquid nozzle 3.

Жидкостное Сопло 3 крепится к кор пусу 1 при помощи гайки 5 через прокладку 6 и заземляется при помощи провода 7,The Liquid Nozzle 3 is attached to the housing 1 using a nut 5 through a gasket 6 and is grounded using a wire 7,

Отношение разности внутреннего диаметра сЦ втулки и наружного диаметра dg, жидкостного сопла к внутреннему диаметру d^ жидкостного соп ла составляет 4-5,5, а отношение’ внутренних диаметров втулки di и жидкостного сопла d составляет 8-14.The ratio of the difference between the inner diameter of the bushing hub and the outer diameter dg, the liquid nozzle to the inner diameter d ^ of the liquid nozzle is 4-5.5, and the ratio ’of the inner diameters of the bushing di and the liquid nozzle d is 8-14.

Распылитель работает следующим образом.The sprayer operates as follows.

Сжатый газ через штуцер 2 поступа ет в корпус 1, кольцевой струей обтекает срез жидкостного сопла 3 и осуществляет распиливание жидкости.Compressed gas through the nozzle 2 enters the housing 1, an annular stream flows around the slice of the liquid nozzle 3 and cuts the liquid.

При перемещении жидкости по соплуWhen moving fluid through a nozzle

»». I <"". I <

Происходит ее электризация, а при выходе жидкости из сопла происходит разделение электрических зарядов: на капельках жидкости образуется заряд одного знака, а на контактирующей с жидкостью внутренней поверхности сопла заряды противоположного знака. Поток заряженных капель жидкости направляется на обрабатываемую поверхность.The flow of charged liquid droplets is directed to the surface to be treated.

При распылении дистиллированной воды на распылителе с металлическим (стальным) жидкостным соплом и разменами соответственно в пределах df= 2-8 мм, dg = 1-6 мм, с/д з 0,31 мм при давлении газа (сжатого возду ха) около 3 ати заряженная до 3,6* 10~^г Кл металлическая пластина размером 200 х 200 мм, отстоящая от распылителя на расстоянии 200 мм, нейтрализуется в течение 5с.When distilled water is sprayed on a sprayer with a metal (steel) liquid nozzle and changes respectively within df = 2-8 mm, dg = 1-6 mm, s / d s 0.31 mm at a gas (compressed air) pressure of about 3 If a metal plate 200 x 200 mm in size, charged up to 3.6 * 10 ~ ^g C, is separated from the atomizer at a distance of 200 mm, it is neutralized for 5 s.

Из графика на фиг.2 видно, что наибольшая электризация жидкости происходит при следующих соотношениях размеров d< - dg _From the graph in figure 2 it is seen that the greatest electrification of the liquid occurs with the following size ratios d <- dg _

Описанное устройство просто и удобно в эксплуатации и удовлетворяет требованиям искробезопасности,The described device is simple and convenient to operate and meets the requirements of intrinsic safety,

Claims

The invention relates to pneumatic devices for producing electrically charged particles in a gas stream and can be used to neutralize electrostatic charges, to deposit a spray liquid on various surfaces, etc. An electrostatic atomizer is known that comprises a housing supplied with a gas nozzle and along its axis there are liquid nozzles and a sleeve, the inlet end of which is located in the same plane with the output end of the liquid nozzle 1. A disadvantage of this device is the necessity of supplying high voltage to the sleeve. charging of the sprayed material, which also prevents its use in explosive and fire hazardous conditions. The purpose of the invention is to simplify the design and provide intrinsic safety by eliminating the supply voltage to the sleeve. To achieve this goal, the ratio of the difference between the inner diameter of the sleeve and the outer diameter of the liquid nozzle to the internal diameter of the latter is 4-5.5, and the ratio of the inner diameters of the sleeve and the liquid nozzle is 8-14. Figure 1 shows the device in section; Fig. 2 shows the dependence of charge on the ratio of sizes. The atomizer comprises a housing 1 with a plug 2 for supplying rasai. A liquid nozzle 3 and a sleeve 4 are installed along the axis of the housing.1, the inlet end of which is located in the same plane with the output end of the liquid nozzle 3. The liquid nozzle 3 is attached to the housing 1 by means of a nut 5 through the gasket 6 and is grounded by the wire 7. The ratio of the difference between the inner diameter-di of the sleeve and the outer diameter d of the liquid nozzle to the internal diameter d of the liquid nozzle is 4-5.5, and the relative diameter of the internal diameter of the Cli nozzle Cli of the liquid nozzle d is 8 -14 . The spray works as follows. The compressed gas through shtutuser 2 enters the body 1, an annular jet flows around the section of the liquid nozzle 3 and sprays the liquid. As the fluid moves through the nozzle, it electrifies, and when the fluid leaves the nozzle, the charge is separated; on droplets of a liquid, a charge of one sign is formed, and on the contact of a liquid with the internal surface of the nozzle, a charge of opposite sign. Flow of charged liquid droplets is directed to the surface to be treated. When spraying distilled water on a sprayer with a metal (steel) liquid nozzle and dimensions, respectively, within the range of dfc: 2-8 mm, dg 1-6 mm, s / s 0.31 mm with pressure The gas (compressed air) of about 3 times the charged up to 3.610 K metal plate with a size of 200 X 200 mm, spaced from the sprayer at a distance of 200 mm, is neutralized for 5 s. It can be seen from the graph that the most electrifying of the liquid occurs at the following dimensions of dimensions d - da g g The described device is simple and convenient to operate and meets the requirements of intrinsic safety. An electrostatic atomizer comprising a housing provided with a gas inlet, along the axis of which a liquid nozzle and a sleeve are placed, the inlet end of which is flush with the output end of the liquid nozzle, which simplifies the design and provides intrinsic safety. by eliminating the voltage supply to the sleeve, the ratio of the difference between the internal diameter of the sleeve and the external diameter of the liquid nozzle to the internal diameter of the latter is 4-5.5, and the ratio nnih sleeve diameters and liquid nozzle is 8-14. Sources of information taken into account in the examination 1. USSR author's certificate No. 387744, cl. В 05 В 5/00, 1970 (prototype).