SU1695349A1 - Device for indicating state of actuating mechanism - Google Patents

Abstract

The invention relates to a technique for automating technological processes, is intended to be used as a means of displaying information on final positions and movements of locking-regulating and similar actuators on mimic diagrams and can be used in local, centralized and automated control systems in chemical and other industries. Industry The purpose of the invention is to increase the informativeness of the device. To do this, a device containing five OR elements, three indicators , Three AND gates, two flip-flop, a NOR element, two positions of the sensor, the tire Open, Close, and Stop introduced delay element and a switch. The device provides an alarm signaling the actuator on the tires Close and Open, the actuator moves in the direction of opening and closing with indication of being in an intermediate position, jamming of the moving system of the actuator in an intermediate position when moving in the direction of closing and opening and finding the actuator in the end positions. 2 Il.

Description

The invention relates to the automation of technological processes, is intended for use as a means of displaying information about the end positions and movement of valves and similar actuators on mnemonic diagrams and can be used in local, centralized and automated control systems in chemical, petrochemical, gas and other industries.

The purpose of the invention is to increase the information content of the device.

FIG. 1 shows a diagram of the device; in fig. 2 - circuit switch.

The device contains the element OR 1, the switch 2, the element 3 delay, the element OR 4, the indicator 5 position Closed, the indicator 6 position Open, the indicator 7 The middle position, the element 8, the element OR 9, the elements 10 and 11, the generator 12 pulses element OR NOT 13, triggers 14 and 15, elements OR 16 and 17, position sensor 18 Closed, position 19 sensor Open, tire 20 Open tire 21 Stop and tire 22 Close

Switch 2 can be performed on the element NOT 23, the elements AND 24 and 25 and the element OR 26.

The device works as follows.

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The initial state of the elements depends on the initial position of the actuator and on previously issued commands.

For the initial state, we assume that the actuator is completely closed. In this case, the high signal from the position sensor 18 through the OR element 1 causes the indicator of the 5 position to glow evenly. The indicators 6 and 7 are not illuminated, because from the position sensor 19 and from the outputs of the element 11 and trigger 14 and the element OR NOT 13, they receive low-level signals through the element OR 4 and the switch 2.

When the Open signal is sent through bus 20 (high level signal), trigger 14 is triggered and a high level signal is generated at its output, which enters the inputs of the OR element 9 and the And 11 element. At the same time, the pulse signal from the generator 12 output passes through the And 11 element to the input the element OR 4, the output of which also has a pulse signal, which ensures the flashing of the indicator 6. The output of the element OR 9 is a high level signal arriving at the input of the element And 10.

When the moving system of the actuator starts moving, the sensor 18 triggers and a low level signal appears at its output. In this case, the indicator 5 turns off, at the inputs of the OR-NOT 13 element, low-level signals appear, and at its output - a high-level signal, which passes through the switch 2, providing an even illumination of the indicator 7, and arrives at the input of the element And 10, Na In this case, the output of element 10 generates a high level signal, which enters the input of delay element 3, which is adjusted for a certain time interval, the value of which is determined based on the time required for the actuator to move from one extreme position to another.

When the actuator is fully opened, the position sensor 19 is triggered, at its output a high level signal arrives through the OR element 16 at the input of the trigger 14, switching it to the initial state. In this case, the delay element 3 is reset. The high level signal from sensor 19 passes through the OR 4 element, ensuring that indicator 5 is evenly lit, indicator 7 is turned off.

In the case of jamming of the moving system of the actuator in an intermediate position after a specified time

At the output of the delay element 3, a high level signal appears, which arrives at the control input of the switching device 2. This switches it, a pulse signal from the output of the generator 12 passes to the output, and the indicator 7 lights up with a flashing light. Indicator 6 also continues to blink.

When the stop signal is on the bus 21

when the actuator is in an intermediate position, trigger 14 returns to its initial state. In this case, an element of 3 delays comes to its initial state,

the output of the OR 4 element appears a low level signal, the indicator b turns off, and the indicator 7 continues to shine with a steady light.

The actuator is reversed to provide a high level signal on bus 22 Open. In this case, the trigger 15 is activated and the indicator 5 is flashing with a blinking light. At the beginning of the moving movement of the actuator system, the sensor 19 is triggered and a high level signal appears at its output. At the same time, the indicator 6 is turned off, and the indicator 7 lights up in a steady light. When the actuator is completely closed, the sensor 18 and the trigger 15 are triggered, the indicator 5 lights up in a steady light, and the indicator 1 turns off.

When jamming the moving system of the actuator when applying

The stop signal on bus 21 the device works in the same way as in the case of jamming during the straight course.

Claims (1)

Invention Formula The device for signaling the states of the actuator, comprising a first position sensor, the output of which is connected to the first inputs of the OR-NOT element and the first OR element and with the first input of the second element OR, the output of which is connected to the first indicator, the second position sensor, the output of which is connected to the second input of the element OR NOT, with the first input of the third the OR element and the first input of the fourth OR element, the output of which is connected to the second indicator, the output of the first OR element is connected to the first input of the first trigger, the output of which connected to the first input of the first element AND, the output of which is connected to the second input of the second element OR, the output of the third element OR connected to the first input of the second trigger, the output of which is connected to the first input of the second element And, the output of which is connected to the second input of the fourth element OR, the output of the element OR is NOT connected to the first input of the third element AND, a pulse generator, the output of which is connected to the second inputs of the first and second elements AND, bus Open, Close and Stop, fifth element OR and the third indicator is related to the fact that, in order to increase the informativeness of the device, a switch and a delay element are entered into it, the Open bus is connected to the second input of the second trigger, the output of which is connected to the first input of the fifth 0 the OR element, the output of which is connected to the second input of the third element I. The output of which is connected via the delay element to the first input of the switch, the output of which is connected to the third indicator, the Close bus is connected to the second input of the first trigger, the output of which is connected to the second input of the fifth element OR , the output of the element OR is NOT connected to the second input of the switch, the output of the pulse generator is connected to the third input of the switch, the bus Stop is connected to the second inputs of the first and third elements OR. L FIG. 2