SU748579A1 - Device for detecting and eliminating short-circuiting in ready-made incandescent lamps - Google Patents

Description

This invention relates to the electrical industry and in particular to the manufacture of incandescent lamps. -5

One of the common types of waste incandescent bulbs is the short circuit of the interelectrode gap. Production technology provides for 100% screening of short-circuited incandescent lamps and allows their subsequent correction while maintaining the electrical and light parameters.

Devices for the electrical and erosion treatment of metals are known, in which the energy of discharge of an electric pulse is used to remove a methycle.

Of the known devices, the most 20 closest to the technical essence of the proposed is a device for eliminating short circuits in finished miniature incandescent lamps 2. This device contains 25 adjustable sources of electrical energy connected to the contacts for connecting the lamp. - #

The disadvantages of the known device are low throughput OQ

the ability and low output of the corrected lamps due to the separation of the process of eliminating short circuits in the detection and correction operations, as well as the lack of a connection between the state of the interelectrode gap and the electrical energy dose delivered to it.

The purpose of the invention is to increase the capacity of the device and the output of the corrected lamps.

The goal is achieved by the fact that the device containing an adjustable source of electrical energy connected to the contacts for connecting the lamp is equipped with a circuit to connect the current of the lamp, which is connected in parallel to the indicated contacts and contains a power source and an electronic current relay connected in series with it and the setting device. contacts, and an adjustable source of electrical energy is connected to the contacts for connecting the lamp through the closing contact of the relay.

FIG. 1 shows a block diagram of a device for detecting and eliminating short circuits in finished incandescent lamps, and FIG. 2 is a graph explaining his work, where 1e is the current in the lamp circuit, t is the switching time of the control circuit; . maximum permissible current value in the lamp circuit; t. - switching circuit switching time; VHCH correction target voltage

The device for detecting and eliminating short circuits in finished incandescent lamps contains contacts 1 for connecting the lamp and two circuits connected in parallel to them, one of which - the LAMPA current control circuit - consists of a series-connected power supply 2, an electronic current relay 3 and its open contact 4 and the other - the lamp rectifying circuit - from the regulated source 5 of electrical energy and the closing contact 6 is the electron of the current relay 3 with the setting device 7.

The device works as follows.

The contacts 1 from the power source 2 supply the nominal voltage of the monitored lamp, and the setpoint of the setting device 7 sets the tripping current of the electronic current relay 3 corresponding to the maximum permissible current of the lamp. The parameters (voltage, capacitance) of the adjustable source of electrical energy are set in accordance with the type of lamp being tested. When a healthy lamp is connected to the contacts 1, the current flowing in its circuit will be less than the setpoint of the setpoint generator 7, and the electronic current relay 3 will not respond to the lamp will light up. When a short-circuited lamp arrives at the contact table, the electronic current relay 3 and its disconnects contact 4 will disconnect the test lamp from the current control circuit of the lamp, and the closing contact discharges the energy stored by the adjustable source to the side and center contact of the simultaneous bridging of the lateral and central contacts nick 5. During the pulse energy density at the contact portion of the closure volume increases to a value at which processes occur elektrerozionnye its vaporization and removal. Pulsed impulses of electrical energy remove the contact volume of the closure to a depth of A 5 where, the maximum voltage of the pulse, E is the electrical strength of the medium formed by the gap. By breaking contact 4 with its power supply circuit, the electronic switch is turned off. So, up to those

Then, while in the lamp circuit it exceeds the maximum allowable value, the opening 4 contact provides positive feedback and the electronic current relay operates in the auto-oscillator mode, sending a short-circuited zone of the lamp. A sequence of electrical energy pulses and monitoring the effect of each pulse on it.

For reliable operation of the device, it is necessary that the switching time of the correction circuit ty, -f, and the circuit controlling the current t of the lamp does not overlap. The electrical energy entering the lamp is dosed to the accuracy of

5 of a single pulse, which, with an appropriate degree of discretization, fully guarantees both the elimination of short circuits in the finished incandescent lamp and its protection

0 overload and significantly increases the output of the corrected lamps. The use of the control circuit of the lamp current and its switching elements made it possible to combine control operations,

5 detecting and correcting the short-circuit of the lamp, as well as automating the dosing of the energy necessary to eliminate the short-circuit of the lamp, which significantly jj reduces the technological time for these operations and significantly increases the throughput of the proposed device.

Claims (2)

Invention Formula A device for detecting and eliminating short circuits in finished incandescent lamps, containing an adjustable source of electrical energy, connected. to the contacts for connecting the lamp, characterized there that, in order to increase the device's throughput and the remediation output of the lamps, it is equipped with a circuit for controlling the current of the lamp connected in parallel with the indicated contacts and consisting of a lamp power supply connected in series, an electronic current relay with a dial and opening contacts of the relay, and an adjustable, source of electrical energy is connected to the contacts for connecting the lamp through the closing contact of the specified relay. Sources of information taken into account during the examination 1. Electrophysical and electrochemical methods of processing materials. Kiev, 1975, p. 110. 2. USSR author's certificate number 326667, cl. H 01 K 3/30, 1970 (prototype).