SU853618A2

SU853618A2 - Two-positional regulator

Info

Publication number: SU853618A2
Application number: SU792858529A
Authority: SU
Inventors: Леонид Петрович Дмитренко
Original assignee: За витель
Priority date: 1979-12-25
Filing date: 1979-12-25
Publication date: 1981-08-07

Description

(54) ДВУХПОЗИЦИОННЫЙ РЕГУЛЯТОР(54) TWO-POSITIONAL REGULATOR

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Предлагаемое устройство относитс к области автоматики и предназначено дл двухпозиционного регулировани температуры, уровн жидких и сыпучих сред, давлени и других параметров, обеспечивающих переключение контактов датчиков.The proposed device relates to the field of automation and is intended for on-off control of temperature, level of liquid and granular media, pressure and other parameters that ensure the switching of the contacts of the sensors.

По основному аВт. св. 610077 известен двухпозиционный регул тор, содержащий подключенные к источнику питани последовательно соединенные реле и тринистор, к управл ющему электроду которого через резистор подключен один конец вторичной обмотки трансформатора, первична обмотка которого подключена к источнику питани , а другой конец вторичной обмотки трансформатора подключен к катоду тринистора, и контактные датчики. Управл ющий электрод тринистора соединен с катодом тринистора через первый контактный датчик, параллельно которому включены последовательно соединенные размыкающий контакт реле и второй контактный датчик. Однако функциональные возможности регул тора ограниченыИЦелью изобретени вл етс расщирение функциональных возможностей регул тора.On the main AVT. St. 610077 a two-way controller is known, which contains connected in series power relays and a trinistor to the control electrode of which through a resistor is connected one end of the secondary winding of the transformer, the primary winding of which is connected to the power source, and the other end of the secondary winding of the transformer is connected to the cathode of the tristor, and contact sensors. The control electrode of the trinistor is connected to the cathode of the trinistor through the first contact sensor, in parallel with which the disconnecting contact of the relay and the second contact sensor are connected in series. However, the functionality of the controller is limited. The purpose of the invention is to extend the functionality of the controller.

Дл достижени этой цели он содержит первую кнопку управлени и последовательно соединенные выпр митель, тиристор и вторую кнопку управлени , через которые вторична обмотка трансформатора св зана с резистором, а перва кнопка управлени включена между анодом и управл ющим электродом тиристора.To achieve this goal, it contains a first control button and a series-connected rectifier, a thyristor and a second control button, through which the transformer secondary winding is connected to a resistor, and the first control button is connected between the anode and the control electrode of the thyristor.

Схема двухпозиционного регул тора приведена на чертеже.Diagram of the on-off controller is shown in the drawing.

Он содержит реле 1, например магнитный пускатель, подключенный к источнику It contains a relay 1, for example a magnetic starter connected to a source

10 питани (клеммы 2,- 3) через тринистор (симистор ) 4 с контактными датчиками 5 и 6 в цепи управлени , трансформатор 7, резистор 8, размыкающие контакты 9 реле 1, тиристор 10, первую и вторую кнопки уп15 равлени И, 12 и выпр митель, образованный диодом 13 и конденсатором фильтра 14.10 power supply (terminals 2, - 3) through a trinistor (triac) 4 with contact sensors 5 and 6 in the control circuit, transformer 7, resistor 8, disconnecting contacts 9, relay 1, thyristor 10, first and second control buttons of control I, 12 and Rectifier formed by diode 13 and filter capacitor 14.

В качестве датчиков могут быть использованы датчики уровн , положени и температуры , магнитоуправл емые (герконы) и ртутные контакты, биметаллические реле Level sensors, position and temperature sensors, magnetically controlled (reed switches) and mercury contacts, bimetallic relays can be used as sensors.

70 и др.70 and others

Claims

The operation of the regulator is considered in the case of the use in it of level sensors of bulk materials 5 and 6, which represent themselves. 38 for example, reed switches, which are affected by permanent magnets mounted on pivotally rotated plates with controlled material. However, the operating principle of the regulator does not change even if mercury thermo-contact temperature sensors, pressure sensors, etc. are used in it. The material level at which the contacts of sensor 5 are closed is chosen lower than the material level at which sensor 6 is triggered to the required ambiguity zone, so that executive relay 1 is turned on at one material limit level and turned off at a higher environmental level. When the supply voltage is applied, the rectifier is charged to the amplitude value of the voltage on the secondary winding of the step-down transformer 7 of the filter capacitor 14. When the button 11 is pressed through the sensors 5 or 6, the contacts of the relay (actuator) 1 or the triac of the triac 4, the resistor 8 is the contacts of the button 12, the control electrode-cathode transition of the thyristor 10 under the action of the voltage on the capacitor of the filter 14 current flows, causing the thyristor 10 to be unlocked and holding it in the on state and upon opening Buttons I. When the material level, for example, in the hopper is below sensor 5, it opens, and the gap of the control electrode-cathode of the triac 4 is disconnected. The triac under the action of the current flowing through the open thyristor 10, the resistor 8 and its control circuit, under the action of the voltage on the capacitor of the filter 14, opens and switches on the relay 1. The relay 1 controls the conveyor supplying the product with its power contacts (not shown). in capacity. The contacts 9 of the relay 1 are closed, therefore, when the material level increases and the contacts of the sensor 5 close, the triac 4 remains open. When the level of material in the vessel reaches the upper limit value and the sensor 6 closes, the gap of the control electrode-cathode of the triac 4 is clamped down and the triac is prohibited by disconnecting the relay. The relay closes its contacts 9 so that the triac 4 will be closed until the contacts of the sensor 5 are open. Regardless of the position of the contacts of the sensors 5 and 6, the thyristor 10 is held in the open position by the action of direct current flowing through its anode circuit. When the supply voltage disappears at terminals 2, 3 or when button 12 is pressed, thyristor 10 is closed, and unlocking of triac 4 and 8, the activation of relay 1 in this case does not occur regardless of the position of the sensor contacts. In the future, the controller works in the same way. Thus, the introduction of a rectifier and a thyristor connected in series to a two-position controller, their connection between a triac control electrode and a transformer through a resistor, and a control thyristor connecting the control electrode to a resistor control button provides remote control of the two-position regulator and its zero protection. Instead of a step-down transformer, a ballast capacitor and a zener diode connected in series to the power supply terminals can be used in the regulator circuit, in parallel to which a rectifier consisting of a diode 13 and a capacitor 14 is connected instead of the secondary winding of the transformer. ), which limits the number of actuations of the actuator to acceptable values and thus significantly increases the reliability l his work. The controller is provided with remote control of its operation and zero protection. The regulator circuit is characterized by simplicity, high sensitivity and output power, which will provide it with practical application in combination with contact sensors for liquids and bulk materials, pressure, temperature, etc. in the regulators of the corresponding parameters in various branches of the national economy. Claims of the invention Two-positional regulator St. No. 610077, characterized in that, in order to extend the functionality, it comprises a first control button and a series-connected rectifier, a thyristor and a second control button, through which the transformer secondary winding is connected to a resistor, and the first control button is connected between the anode and control thyristor electrode. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 610077, cl. G 05 D 23/19, 1977 (prototype).

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