SU570883A1 - Multichannel device for hopper charging control - Google Patents

Description

one

The invention relates to computing, in particular, to devices for controlling the loading of bunkers, and can be used in automatic control systems for loading bulk materials of a large number of bunkers (tanks).

A multichannel device 1 for controlling the loading of bins is known, comprising an information availability trigger, an AND element and an encoder.

However, this facility does not allow one to determine which of the peseipcyapOBs needs to be serviced in the first place, since the device has one input from each bunker (sensor).

It is also known that the multichannel device 2 for controlling the loading of bins contains the switch, the OR element, the presence sensor of the material to be loaded, and in each channel the ZAIRET element, the upper sensor and the low level sensor, and the switch outputs connected to the interrogation inputs of channels, the output of the sensor of the presence of material to be loaded - with the signal inputs of the channels, the outputs of the channels are the command outputs of the device.

The drawback of the device is the non-silence of timely servicing of several bunkers due to the absence of signals about the intermediate state of the bunkers, that

reduces the functionality of the device.

The purpose of the invention is to expand the functionality of the device.

This is achieved by the fact that the requested outputs

channels through the OR element are connected to prohibiting inputs of channels whose outputs are connected to the switch inputs, each channel contains a trigger, the first, second, third elements OR NOT, the element NOT,

the middle level sensor, the output of which and the output of the upper level sensor are connected to the zero and single inputs of the trigger, respectively. The output of the low level sensor is associated with the channel's request output and with the first input of the BAN element, the second input of which is connected to the interlocking input of the channel. The first, second inputs and the output of the first element OR are NOT connected respectively to the zero output of the trigger, the output

the BAN and the first input of the second OR-NOT element, the second input and output of which are associated respectively with the signal input of the channel and with the first input of the third element OR NOT. Channel quiz input

through the element is NOT connected to the second input of the third OR-NOT element, the output of which is the channel output, and the zero output of the channel trigger is with its zero input.

The block diagram of the device shown in the drawing.

The multichannel device for controlling the loading of bunkers contains the first channel 1, 1st channel 2, pth channel 3, in the channel element 4 BAN, sensor 5 of the lower level, element OR-NOT 6, trigger 7, sensor 8 intermediate level, sensor 9 upper level, elements OR-NOT 10, AND, element NOT 12, as well as switch 13, element OR 14, sensor 15 for the presence of material to be loaded, interrogation inputs 16, signal inputs 17 channels, interrogation outputs 18, command outputs 19 channels.

The device works as follows.

If to any input element OR NOT

10 a logical signal “1 is input, and a pulse from the switch 13 came to the input of the element NOT 12, at both inputs of the element OR NOT

11 signals "O and at the output of the element OR-NOT 11" signal appears, "1, which starts servicing this bunker and stops the switch 13. From the element OR 14," 1 at the input of the element OR-NOT 10 is applied when the material loaded into bunkers, or at the end of a shift operator, to evenly unload the remnants of material into all bunkers.

The signals of the sensors 5, 8, 9, and the state of the trigger 7 are generated as follows:

if the bunker is unloaded to the priority level (lower level), then the output of the sensor 5 is the signal "1, the output of the sensor 8 is" 1, and the output of the sensor 9 is "O, while the trigger 7 is reset and at its output

when the material in the bunker is between the lower and middle level, then at the output of sensor 5 - "O, sensor 8 -" 1, sensor 9 - "O, while trigger 7 is cleared and at its output a signal

in the case of filling the bunker above the average level, but below the top, at the output of sensor 5 - "O, sensor 8 -" O, sensor 9 - "O, while if the bunker was unloaded below the average level at that moment, then at the output of trigger 7 - "Oh, if not -

if the bunker is filled to the upper level, then at the output of sensor 9 - sensors 5, 8 - “O, while at the output of trigger 7 -“ 1.

The opening for servicing the i-ro bunker is formed if the output of element 4 is BAN and the output of trigger 7 signals “O.

Consider the cases in which this combination of signals is formed.

The t-th bunker generates a priority signal, sensors 5 and 8 have signals at the output: “1, trigger 7 is reset to“ O. At the output of element 4, the BANCH also “O, since its prohibitory input from sensor 5 receives“ 1. Thus, the switch 13, having passed the signals from all other bunkers, will stop at the i-th address, which has a signal of curling priority. If there are several bins with a lower level m, they are also served in the switching sequence of the switch 13 with a time limit using a time relay (not shown).

The i-fi bunker was unloaded to an average level, did not load to the top level and whether there was a single bunker with a higher priority signal. At the same time, trigger 7 is reset in “O and at the output of element 4 BANCH also“ O due to

that both of his inputs receive signals "O. Such bunkers are serviced in the sequence of operation of the commentator 13. If during the service of such a bunker the highest priority signal is received, then the circuit

the start (not shown) will turn on the switch 13, which will find this bunker according to the described principle. A ban on the maintenance of the 1st bunker is formed if the output of element 4 is BAN or trigger 7 - the signal "1.

Consider when this signal is generated.

The t-th bunker is unloaded below the average level, but the high-priority signal has another bunker. In this case, the signal "1 is formed by the BANNER element 4, as the signals" 1 are received at its two inputs. The switch 13 skips this bunker.

i-th tank is loaded to the top level. The signal "1" is emitted by the trigger 7, which maintains this state until then. until the bunker is unloaded below the level.

A new set of features of the invention

in comparison with the known device (new elements and relations between them), ensuring the realization of the purpose of the invention, has a positive effect, in particular, when it is used in the device

loading bunkers of the fuel supply system of a thermal power plant.

With a relatively long stay of the bunker in the state corresponding to the signal of the highest priority, it is so empty that fine grinding mills that are located under the bunker and grind the fuel coming from the bunker to the boiler start to idle, resulting in unproductive energy ( The average power of one fine-grinding mill on a 300 mW power unit is 1500 kW). In addition, the complete emptying of the bunker to cause a load shedding of the boiler unit that it serves, and, consequently, undersupply of electricity. In order to avoid this, service personnel are forced to overestimate the position of the lower level sensors in the bunker. However, these measures lead to a decrease in

capacity bins and therefore little effective