SU1013914A1 - Electromagnetic relay mechanical adjustment parameter checking device - Google Patents

Description

The invention relates to a measurement technique and can be used to control the adjustment parameters of electromagnetic relays, namely, inter-contact gap, contact drawdown, and the power reserve of the core. A device for monitoring the adjustment parameters of sealed electromagnetic relays is known, comprising a driver for the time intervals of the movement of the core and associated contacts, the current and voltage measuring instrument, the calculator of a predetermined algorithm and the indicating device. During the movement of the relay core, time intervals, currents and voltages are measured, then entered into the calculator of a predetermined algorithm, which produces a core of calculation of the measured control parameter after the movement ends. The disadvantage of this device is the increased monitoring time, which is always the switching time of the relay on the value of the calculation of the adjustment parameter of the time; the transfer to the indicating device constituting the S-YuTbm. In addition, the device does not allow direct tolerances second adjusting control parameters closest to the invention is a device for controlling the parameters of mechanical adjustment of the electromagnetic relay soderzhgitsee pulse generating unit, an adder and computing unit. During the movement of the relay core, the formation unit captures the moments of moving and stopping the core, and the adder captures the instant of complete closing of all the relay contacts. The selected points in time are entered into the counting device, which after the end of the core movement (the stop determines the time interval of the core movement and the time interval of contacts in the closed state, the ratio of these intervals. Based on the obtained ratio of time intervals, the counting unit in additional time it calculates the stroke of the corr of relay C21. The lack of this device is due to the lower monitoring performance, since the monitoring time is always longer than the switching time of the relay The calculation time of the adjustment parameter in the counting unit and the transfer of the result to the indicator device. Moreover, the device does not allow the production of direct control. The aim of the invention is to increase the control performance, as well as This goal is achieved by the fact that the device containing the power supply unit of the relay coil, the time difference unit of the movement of the core and the time separation unit contact shaft, a pulse generator, two log; -s elements AND pulse number divider with dividing ratio and pulse number divider with variable division ratio, dividing ratio switch of the second divider, two shift registers and two discrete scale indicators, the generator output the pulses are connected to the first inputs of logic gates And, to the second input of the first logic gates And connected to the output of the block allocation of the time interval for the movement of the contact, to the second input to Logic element AND is connected to output 6 ioc of the time interval of the movement of the core, the input of the pulse divider with a constant division factor is connected to the output of the first logic element AND, and its output to the shift input of the first shift register, the input of the pulse number divider with a variable division factor is connected to the output of the second logical element And, and its output to the shift input of the second shift register, the signal input of the first bit of each of the shift registers fed the potential of logical units The outputs of the logical unit of each of the bits of the first shift register are connected to the corresponding element of the first discrete digital indicator, and the outputs of the logical unit of each of the bits of the second shift register are connected to the corresponding element of the second discrete digital indicator, the scales of both indicators are located one under the other element by element . Introducing the first and second shift registers in combination with the first and second discrete scale indicators into the device allows to combine the time measurement and indication process with the relay switching process and thus solve the task of minimizing the monitoring time as a whole. The introduction of the AND generator and the pulse number divider are also intended to solve the problem of increasing the control productivity, since they are necessary for connecting the shift registers with time allocation circuits: intervals.

Construction of the device as a two-channel device with a combination of w element by element indicators; the norm of the parameter and its true value allows the peuAiTb task, tolerance control, and also eliminates the values of the monitored parameter, once the tolerance control task is equally successfully solved for any measurement.

Introduction to a switch device allows one to achieve the objectives of the invention with different values of monitored relay adjustment parameters (for example, for different types of electromagnetic relays.

The drawing shows a block diagram of the proposed device.

The device contains a controlled relay 1, a block 2 for allocating a time interval for the movement of a contact, a block 3 for allocating a time interval for moving the core, the first 4 second 5 logical elements AND, a pulse generator 6, a divider 7 of the number of pulses with a constant division factor, a divider 8 pulses with a variable coefficient pulse divisions, the first 9 and second 10. shift registers, the first 11 and second 12 scale discrete indicators, the division factor switch 13, 14 non-luminous and the luminous 15 elements of the scale discrete indicators s, the relay power supply unit 16.

The operation of the device is considered on the example of monitoring the intercontact gap of the relay with closing contacts. The regulator exposes with switch 13 the division factor necessary for a given type of relay, based on the technical documentation of the standards of an intercontact Eaeor. Start button (not shown) starts the operation of the power supply unit of the winding of the relay 16.

When the voltage is reached, relay 1 begins to move, which is fixed by the allocation units of the time intervals of the contact 2 and the core 3 as the beginning of the pulses from their outputs. The coincidence of the output pulse of the block 2 or 3 with the pulses of the generator 6 on the elements AND 4 or 5 allows to convert the J interval into a sequence of pulses. Element I 4 is closed at the first input at the time of closing the open contact, and Element 5 is in the process of stopping the box. Thus, the conversion of the time intervals into a sequence of pulses is completely completed at the moment of the cor (the first contact of the pole) being stopped.

The division of the pulses of the divider 8 allows you to set the rate of contact gap in the number of pulses at the output of the divider 8, the number of bits of the second register with a single state, the number of luminous elements of the second discrete scale indicator.

The division of the pulses by a divider 7 allows you to set the true value

0 of the contact gap in the number of impulses from the output of the divider 7,. the acid bits of the first shift register with a single state, the number of luminous elements of the first

5 rock discrete indicator.

The coincidence of the readings of the scales of the first and second indicators indicates a correct adjustment. If there is a discrepancy between the readings, it has the ability to determine the magnitude and sign of the adjustment error and make an adjustment by bending one of the contact holders by an amount proportional to the error, with repeated control.

five

The above set of functional devices and the connections between them allow for monitoring and industation of the result until the moment of stopping the core, excluding all operations,

0 after this point, and also carry out a direct tolerance control with measurement of the magnitude and sign of the adjustment error by comparing the true value (on the scale

5 of the first indicator; with the norm of the monitored parameter (on the scale of the second indicator, which additionally improves the control performance when adjusting the relay, providing for a series of repeated cycles of control - regulation.

The accuracy of the control and the display / result of the control is regulated by the frequency of the generator b and the number of bits of the scoring registers, the number of

5 cops indicators. With increasing frequency, the accuracy increases, the length of the indicator scale and the number of its elements increases.

The accuracy of setting the value of the ratio of time intervals is determined by the choice of the divisor division factor. In this case, the division ratio of the second divider is always set to be greater than

5 dividing the (constant) first divider, since the movement of the contact is part of the movement of the core (on a time scale). When monitoring contact gap

0 in the relay with disconnecting contacts, block -2 allocates a time interval from the moment of opening of the contacts to the stopping of the core. When controlling the drawdown and the power reserve, the core block 2 selects the time interval of the motor 5 and the core when the contacts C are closed for closing or opening. The rest of the device is similar to that described. The use of the proposed device allows to achieve the highest possible control performance when adjusting the relay. The monitoring time is limited only by the required time from the application of voltage to the winding to the end of the transfer of the core (.e9 stop). The process of measurement and display is completely combined with the specified period of time and does not require additional. The HHTejpBan time is shortened to the maximum by the regulator of control results, due to the indication of the magnitude of adjustment error in the form of a deviation from the norm of the regulated parameter. All this, in turn, improves the performance of the most time-consuming to manufacture a relay operation of its adjustment by 15-20%. The proposed device, as a control-type device, also reduces the qualification requirements of the traffic controller from the requirements of 5–6 bits to 3–4 bits. The device can also be used on the output control operations in the production of the relay and the input control at the consumer during maintenance work. The practical implementation of the device for adjusting the RPS-32 product and its production testing showed that the measurement time is no more than 0.04 s and is equal to the time that the voltage is applied to the winding before the core stops. When the generator frequency b is 4-103 Hz, the division factor of divider 7 is 8, divider 8 is from 12 to 24, the number of elements of indicators 11 and 1 is 27, the measurement of the contact gap is within (0.6 - 0.8 ) the stroke of the core with 5%, the deflection error of not more than the contact spring and the power reserve of the core within (0.2 - 0.4) of the stroke of the core with an error of no more than 10%. i The device of a desktop type is realizfvan on microcircuits of a series K 133 in a normalized case, of the Nadl type, with overall dimensions of 485x400x x 200 mm. Power supply from 220 V, 50 Hz. In addition to the deflection meter of the contact spring and the contact gap, the instrument contains a relay trigger voltage meter and may be the only measure at the workplace of the controller.

Claims (1)

(.57) DEVICE FOR MONITORING THE ELECTROMAGNETIC RELAY MECHANICAL ADJUSTMENT PARAMETERS, comprising a power supply unit, relay windings, a time allocation unit, an arm movement interval, and a contact allocation time separation unit, which are designed to ensure that the implementation of tolerance control and improve control performance, a pulse generator, two logical elements And, a divider of the number of pulses with a constant division coefficient and a divider of the number of pulses with a variable coefficient are introduced into it by a division factor, a division ratio switch. a pulse number divider with a variable division ratio, two shift registers and two discrete discrete indicators, the output of the pulse generator being connected to the first inputs of the logical elements AND, the output of the time interval allocation block connected to the second input of the first element AND contact, to the second input of the second logic element And the output of the block allocating the time interval of the movement of the armature, the input of the divider of the number of pulses with a constant coefficient division is connected to the output of the first logical element And, and its output is connected to the shift input of the first shift register, the input of the divider of the number of pulses with a variable division coefficient is connected to the output of the second logic element And, and its output to shifts © - g to the input of the second shift register, the signal input of the first digit kax ^ from the shift registers is connected to the source of the potential of the logical unit, the outputs of the logical unit of each of the bits of the first shift register are connected to the corresponding element of the first scales discrete indicator, and the outputs of the logical unit of each of the digits of the second shift register are connected to the corresponding element of the second scaled discrete indicator, the scales of both indicators are located one below the other elementwise.