SU859679A1 - Pneumatic apparatus for controlling pumping station - Google Patents

Description

one

The invention relates to pumping station control systems. (

A pneumatic device for controlling a pumping station is known, comprising two supply lines from a power source, one of which is connected through a control element.

and accelerator with

board

an input of the relay provided with on and off cameras and a camera with a normally open nozzle, and the relay output is connected to the memory element connected to the second supply line, and actuators whose inputs are connected to the output of memory element 1.

A disadvantage of the known device lies in the impossibility of controlling the pump station in the event of a failure of the supply lines, which reduces its reliability.

The purpose of the invention is to increase reliability.

The goal is achieved by the fact that the device contains an additional relay with the logical function NOT, the input of which is connected to the second supply line, and the output to the switching-on chamber of the main relay, which turns off the camera

with an accelerator, and a chamber with a normally open nozzle communicated with a power source.

The drawing shows a block diagram of a pneumatic device for controlling a pumping station.

The device contains two supply lines 1 and 2 from the power source 3. The feed line 1 is connected via the Stop control element 4 and the accelerator 5 with the input 6 of the relay 7 equipped with an 8 switching on and off 9 cameras and a camera 10 with a normally open nozzle (not shown).

The output 11 of the relay 7 is connected to the memory element 12 associated with the second line 2. Inputs 15 and 16

20 executive units 13 and 14 communicate with the output 17 of the memory element 12. The device contains an additional relay 18 with the logical function NOT, the input 19 of which is communicated with the second

25 with a supply line 2, and output 20 with a switching chamber 8 of the main relay 7., switching off camera 9 of which is connected to the accelerator 5, and camera 10 with a normally open nozzle

30 communicated with power source 3.

The device also contains elements 21 of the Stop control and 22 Start. Executive units 13 and 14 are connected to a pumping station 23. Memory element 12 is assembled on relays 24 and 25.

Pneumatic device operates as follows.

When the power source 3 is turned on, the compressed air enters through the open control element 4 Sto to the accelerator 5, at the output of which a signal appears that enters the shutdown chamber 9 of relay 7. In addition, compressed air through the chamber 10 with a normally open nozzle and control element 21 The stop enters memory element 12 and prepares it for inclusion. In the event of a fault in the supply line 1, the compressed air also enters the input 19 of an additional relay 18 (blocking signal), and the signal disappears from the output 20 of this relay. The absence of the output signal from the additional relay 18 in the switching-on chamber 8 of the relay 7 supports the supply nozzle (not shown) constantly open regardless of the commands from the accelerator, i.e. the latter is blocked (disconnected) from the control system.

At the output 11 of the relay 7, there is always a signal coming in through the control element 21 Stop to prepare the memory element 12 to be turned on.

The control of the pump station 23 is carried out by the control elements 21 Stop and 22 Start. When the control element 22 is acted upon, the memory element 12 is started, the actuators 13 and 14 are turned on, and the pump station 23 starts operation. When acting on the control element 21, the memory stop element 12 is turned off and the pump station 23 is stopped.

Thus, in the event of a fault in the control line 1, it is possible to troubleshoot this fault during the operation of the pump station. After elimination of the malfunction, from the input 19 of the additional relay 18 the blocking signal is removed by closing the supply line 2, as a result of which the relay 7 again receives commands via supply line 1.

Therefore, the presence of an additional relay 18 with a logic function does NOT improve the reliability of control of the pump station in the event of a failure of one of the power lines.

Claims (1)

1. Matsenko, GN, Grushko, EB, Temper, P.L. Equipment pneumatic automation pumping station SNU-5P. Express information. Issue 62. Ser. Coal engineering. New mining equipment and apparatus. Testing and operating experience. M., ZNIEIugol, 1979, p. 7-10.