SU1091258A1 - Device for making high-frequency thermal treatment of murcury-getter proportioners of luminiscent lamps - Google Patents

Abstract

1. DEVICE FOR HIGH-FREQUENCY HEAT TREATMENT OF GETTERO-MELTING DOSERS OF LUMINESCENT LAMPS, containing a high-frequency generator with a power source and a matching transformer, a single turn inductor with flat parallel branches and a conveyor for movement, which is going to be going to be going to be going to be a no-frc, tugging, but is going to be going to be going to be going to, but is going to be going to be going to be going to, but is going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be) but is going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going to be going through any kind of power. in the heating zone of the ionization of gaseous impurities when exposed to the electric component of the electromagnetic field, the opposite parts of the inductor branches are placed electrostatic shields formed, for example, in single-katu, nis interconnected by a conductive bridge. .

Description

2, The device according to p. I, of t and h of the anti-junction sections is connected with the fact that the screens are made with an electrically conductive jumper,

we are sectioned, and a pair of clothes

1091258

 This invention relates to high HF heat and can be used in the manufacture of fluorescent lamps. A device for high-frequency treatment of getter-mercury dispensers (SRD) of luminescent lamps, containing a plurality of pass-through inductor L 1, is known. The disadvantages of this device containing an inductor, made in the form of a multi-turn coil, are low operational reliability of the inductor due to the large length and small diameter. The TENSING wire, which creates unsatisfactory cooling conditions, and also because of the possibility of - coil breakdown; the ratio of the efficiency of the luminophor of luminescent llamas caused by the ionization of the gas in the inductor electric field; labor input of the inductor. Closest to the proposed technical entity is a device comprising a high-frequency generator with a power source, a matching transformer, a single inductor with flat parallel branches, and a conveyor for re-lamping. The end of the inductor, remote from the power inputs, is grounded. GH is heated to a temperature of 900 ° C in 30 seconds. This heating mode is provided with an inductor current at frequency S: 400 kHz 2. A disadvantage of the known devices is that when a high-frequency electric field passes through the inductor, ionization of the gas through the filling lamp, destruction of gaseous impurities and their adsorption is carried out. This causes a deterioration in the quality of the phosphor and a decrease in the luminous flux of the lamps. Ionization of gas by 3 lamps starts when the ta voltage of the inductor is about 40 V. To achieve the required heating mode and the required performance of the device, it is necessary to apply a voltage of about 500 V. To the bus of the device in the mode that eliminates ionization, the performance of the heat treatment process becomes unacceptably low. In order to reduce the intensity of the electric field in a known device, the ground end of the inductor is used. However, this makes it possible to reduce only the level of the external electric field intensity in the area close to the grounding point, while the electric field intensity in the inductance working zone remains a value that depends only on its energy parameter and configuration of the inductive wire. The purpose of the invention is to improve the quality of the phosphor coating of luminescent lamps in the heating zone of the ionization gas of gaseous impurities when exposed to the electric component of the electromagnetic field. a power supply and a matching transformer, a single-turn inductor with flat parallel branches and a conveyor for moving the lamps to The opposite parts of the inductor branches are electrostatic screens made, for example, in the form of single-layer, connected by an electrically conductive jumper. The screens can be made partitioned, and the caled pair of opposite sections is connected by an electrically conducting switch. 3 The shielding of the working zone of the inductor from the electric field is provided by the interaction of electrically interconnected screens with the branches of the inductor on which they are located and from which they are separated by a layer of electrical insulation. The electric field surrounding the branches of the inductor induces electric charges of opposite sign on the inner surfaces of the screens. Charges of a different sign are concentrated on the external surfaces of the opposite screens, as a result of which a flow occurs from one screen to another along an electrically conductive bridge. The frequency of the current passing through the jumper is equal to the frequency of the power source. The jumper current passes through the screens, the electrically insulating layers in the bias current, along the branches of the inductor and shuts through the secondary winding of the high-frequency transformer. Due to the fact that the electrical resistivity of the jumper is insignificant, in comparison with the capacitance of the circuit between the screens (inductor work area), and the capacitance of the circuit between the inductor and the screens located on them is much less than the capacitance branches, the electric field of the inductor is concentrated mainly in the separating screens and the inductor. Thus, the RF electric field was redistributed from the working zone of the inductor to the area remote from the place of passage of the fluorescent lamps. To avoid the formation of closed current loops and, accordingly, heating of the screens in the electromagnetic field of the inductor, the screens are made in the form of single-layer coils, and to reduce the inductive and active resistance of the screens, the coils are shorted on the outer sides of the inductor branches. In order to increase the effectiveness of shielding, screens can be made partitioned. FIG. 1 schematically shows the proposed device, a general view; in fig. 2 a device with partitioned screens; FIG. 3 section aa in FIG. . The device consists of a high-frequency generator 1 with a power source and a matching transformer 584 rom 2, a single-turn inductor 3, made in the form of two flat parallel water-cooled branches 4 and 5, a conveyor, 6, moving lamps 7, inside which are arranged GRD 8, made in the form of closed loops from strips of stainless steel coated with an activating compound. On the branches x 4 and 5 of the inductor 3 electrostatic screens 9 and 10 are placed, divided into sections 11,12 and 13,14. The opposite sections 11,13, and 12,14 are electrically connected by electrically conductive bridges 15 and 16. Screens 9 and 10 are insulated from the inductor 3 with a thin layer (0.2-0.25 mm) of the insulation coating 17. Sections 11-14 are made in as single-layer coils of copper wire with a wire diameter of not more than 2-3 RF penetration depths. The step of winding sections 11-14 and their lengths are determined experimentally, since their theoretical calculation is rather complicated and inaccurate. When determining the parameters of sections 11-14, the condition is assumed that the residual intensity of electric EO in the working zone of the inductor 3 causes gas to become gas in the lamps 7. When the voltage on inductor 3 is about 500 V, two pairs of sections li, 13 and 12 , 14 with a winding pitch of 2-3 mm provide a sufficient minimum of tension in-l E, j. The speed of transportation of the fluorescent lamps 7 through the inductor 3 is chosen according to the required device performance, the fljiriiiy of the inductor 3 and the voltage on it is determined from the maximum mode, for heating the GRD, for example, to 30 seconds. The device works in a way; -; A high-frequency voltage is applied to the inductor 3. Trucksports 6 uninterruptedly moves the lamps 7 through the inductor 3 in a vertical position. The GDHs are heated in the RF field H of the inductor 3) which lines in the working area are kappava along the axes of the 7. The electric field of the inductor 3 and in the screens 9 and 10 electrically charged, the movement of which causes the currents C and 2 to pass through the Hbie conductor jumper 15 and 16, sections P., 13 and 12,14, insulation coating 17

branches A and 5 of inductor 3 with a short circuit on the secondary winding of transformer 2. In the passage of currents C and 1 of section P-14 and the sections of branches 4 and 5 on which they are located, play the role of capacitor plates between which the main electric field is concentrated, caused by the potential difference between the opposite parts of the branches 4 and 5 of the inductor 3. The magnitude of the residual voltage of the electric field EQ is insufficient to ionize the gas in the fluorescent lamps 7 passing through the inductor 3.

An example. A VCG410 / 0, 44 generator was taken as the power source. Working frequency 440 kHz, inductor length 850 mm. The inductor is made of 50-10 mm shaped copper tube. The voltage on the tires of the inductor is 2; 480 V. A layer of an organosilicate composition with a thickness of 0.2-0.25 mm is applied to the conductor of the inductor. On the branches of the inductor placed two pairs of opposite coils made of copper wire with a diameter

0.15 mm. The coils of the coils are shorted from the outer sides of the branches of the inductor. The opposite coils are connected by conductive bridges and are covered with a layer of an organosilicate composition on top.

Tests of the device showed the absence of gas ionization in the lamps and the characteristic ultraviolet glow for it over the entire length of the inductor when the GDH is heated up to

time 25-30 s, which provides the required performance of the device - 1200-1500 lamps per hour.

The use of the device will allow you to maintain the overall quality of the phosphor at a performance of 8-10 times, exceeding the performance of the known device.

A- (beat)

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Claims (2)

1. DEVICE FOR HIGH-FREQUENCY THERMAL TREATMENT OF HETERO-HERAIDE METERS OF LUMINESCENT LAMPS, comprising a high-frequency generator with a power source and a matching transformer, a single-turn inductor with flat parallel branches and a conveyor for moving the lamps, which improves the quality of the surface for due to the reduction in the zone of heating of ionization of gaseous impurities when exposed to the electric component of the electromagnetic field, on opposite sections of the branches of the inductor placed e Electrostatic screens made, for example, in the form of single-layer coils, interconnected by an electrically conductive jumper. Oh yee Joint venture IQ0 2. The device according to π. 1, with respect to the opposite sections Moreover, the screens are made with a conductive jumper, we are partitioned, and each pair