SU576565A1 - Pneumatic apparatus for remote control - Google Patents

Description

one

The invention relates to locking control devices for various units, for example for remote control of main ship propulsion systems.

In a number of cases, shipboard control devices are subject to increased reliability requirements in the sense of ensuring operability in the event of a breakdown or partial damage to pneumatic lines. Control devices are known that contain valves controlled by pressure sensors. However, most of the known devices are characterized by the fact that when the link is damaged, the level of the control signal decreases. As a result, the set operation mode of the units changes, which is unacceptable in many cases.

It is also known a device for remote control, comprising a command signal generating unit, the output of which through a normally open valve is connected to the output channel of the device and an input of the memory unit whose output through a normally closed valve is connected to the output channel of the device, and a minimum signal level sensor whose input connected to the output of the command signal generation unit, and the output connected to the control inputs of the valves. This known device does not ensure that the command signal is memorized at the time the link is damaged, that its reliability. The purpose of the invention is to increase reliability in case of control line failures by maintaining the value of the control signal preceding the failure. In the described device, this is achieved in that it contains an indicator of a negative derivative,

the pulsator and the OR element whose output is connected to the control input of the memory unit, the inputs to the output of the minimum signal level sensor and the output of the pulsator connected by its input to the negative derivative indicator whose input is connected to the output of the command signal generation unit.

The drawing shows a diagram of the described device.

The command signal generating unit 1 is connected by a communication line 2 through a normally open valve 3 to the output channel 4 of the device n to the input of the memory unit 5. The output of block 5 through a normally closed valve 6

connected to the output channel 4 of the device. The output of sensor 7 of the minimum signal level, the input of which is connected via line 2 to the output of unit 1, is connected to the control inputs of valves 3 and 6 and through the element PIJIl-I

8 - to block 5. Block 1 is connected via line 2

3

also with a negative derivative indicator 9, successively connected to the pulser 10 and the element OR 8.

In normal operation, the command signal from the command signal generation unit 1 enters via line 2 through valve 3 to output channel 4. Unit 5, the output of which is blocked by the normally closed valve 6, tracks the command signal. Any reduction of the command signal in line 2 at the output of the indicator 9 of the negative derivative produces an impulse, which through the pulser 10 and the element OR 8 enters block 5, as a result of which the block switches to the memory mode (the block from the output channel 4 is still remains disabled).

If the decrease in the signal in line 2 was not caused by its damage, then block 5 returns to its original position — into tracking mode — after a time determined by the setting of the pulser 10. If, after decreasing the command signal, the signal 2 of the indicator 9 of the negative derivative receives malfunction, valve 3 closes and disconnects line 2 from output channel 4. At the same time, a line failure signal from indicator 9 opens valve 6, connecting the output of block 5 to channel 4, and flows through the OR 8 element to block 5, blocking it in memorizing.

Thus, if the line is damaged, which is detected by the minimum signal level sensor 7, when the signal in the communication line drops below a specified minimum level, the output command signal in channel 4 is restored to the value that occurred at the time the signal began to decrease, 9 negative derivative.

The technical and economic effect is achieved as a result of an increase in the reliability of operation of ship power plants equipped with the described automated remote control device.

Claims (1)

Invention Formula An inevmatic remote control device containing a command signal generating unit, the output of which through a normally open valve is connected to the output channel of the device and the input of the memory unit whose output through a normally closed valve is connected to the output channel of the device, and a sensor of the minimum signal level whose input is connected to the output of the command signal generation unit, and the output is connected to the control inputs of the valves, characterized in that, in order to increase reliability in case of line failures, ION by storing values of a control signal prior to failure, it comprises a negative indicator derivative impulsator and an OR gate, the output of which is connected to the control input of the memory unit, the inputs to the output of the minimum signal level sensor and the output of the pulsator connected by its input to the negative derivative indicator, the input which is associated with the output of the command signal generation unit.