SU1359225A1 - Arrangement for automatic control of parameters of installation for vertical pneumatic transport of loose material through pipe - Google Patents

Abstract

This invention relates to the field of pipeline pneumatic conveying. The purpose of the invention is to increase the regulation accuracy. A device for automatically controlling the installation parameters of the vertical pipeline pneumatic conveying of the bulk material contains a pulsation sensor 15 installed on the vertical pipeline, which has outlets with selectors 19 and 20, the outlets of which and the outlet of the pressure setting unit 21 are connected to the inputs of the adder 16, the outlet of which is connected to the regulator 13, connected to the actuator 17 on the main air flow bypass line I8. The controller 13 generates a modified signal that causes a change in the position of the actuator I7, leading to a change in the flow of additional air. 1 il. a (L

Description

1359225

The invention relates to piping,

water transport, in particular to ust-fjoftcTBy for automatic control of the mode of pneumatic transport of raw material in a vertical pipeline.

The purpose of the invention is to increase the accuracy of the adjustment.

The drawing shows the principle of the device.

Bulk material is supplied from reactor 1 to dozer 2, which through pipe 3 enters the hopper 4. The flow rate of the main flow of the transporting agent is controlled by the pressure regulator 5 using the flow sensor 6 and the actuator 7 installed on the main air flow 8. The load capacity is controlled by a pressure regulator 9 using a load capacity sensor (pressure) 10 and an actuator 11 mounted on an additional air stream 12.

The pressure pulsation at the control point of the pipeline is controlled by the pulsation regulator 13 connected by its first input to the output of the pressure pulsation converter (averager) 14, which is connected to the output of the pressure pulsation sensor 15. The second input of the regulator 13 is connected with the output of the adder 16, and the output is connected with the executive mechanism 17 installed on the bypass line 18 of the main air flow.

The adder 16 is connected by a first input to the output of the selector 19, connected by its input to the second output of the pressure pulsation sensor 5 and intended for selecting the first maximum peak of the output signal of the pressure pulsation sensor 15, the second input to the output of the selector 20 connected with its input the third output of the pressure pulsation sensor 15 and intended for the selection of the first minimum peak of the output signal of the sensor 15 of the pulse 50 of the adder 16. The last pressure output, and the third input with the manual output adatchika 21. The adder 16 is designed for the algebraic summation of the input signals,

those.

R, l

 p., + p.

Ij

where P,

- output pa 16;

if

signal

+ P,

emits to the reference chamber of the regulator 13 and disrupts the equilibrium in it, since there is a mismatch in the output signal of the converter 14, which corresponds to the averaged value of the pressure pulsation and its predetermined value. To restore balance

the totalizer 13 modulates the modified signal, which causes a change

i

0

2 /

OUTPUT signal selector 1 9;

output signal of the selector 20;

the output signal of the manual setting device 21. The selector 19 operates as follows.

13 if P is the occurrence of the first maximum peak in the output signal of the sensor 15 ().

f -, in the absence of a maximum peak in the output signal Sia ((

- task for

le sensor 15; selector 19.

The selector 20 works as follows,

20 at the occurrence of the first minimum peak in the output signal of the sensor 15 (P, ..).

 R

iO zof,

minimal peak

about

is in the absence of mi- in the output signal of the sensor 15; P j is the task for selector 20.

The device works as follows.

When changing, for example, a decrease in the speed of movement of the bulk material, caused by a change in one of the parameters (decrease in the temperature of the material or transporting agent, or increase in the density of the material, etc.), the pressure pulsation measured by the sensor 15 changes (increases) and in the output A sensor signal entering selectors 19 and 20 will receive a ppt value (maximum peak).

The modified output signal of the selector 19, equal to the maximum peak of the output signal of the sensor 19 in the specific example, goes to the adder 16, where the signal corresponding to the critical material velocity for average operating conditions of the pneumatic lift signal is received from the manual setting device 21 and a change (increase) in the output signal position actuator 17, resulting in a change (increase) in the flow of additional air.

The position of the actuator 17 is changed until the pressure pulsation, measured by the sensor 15, reaches a predetermined value and equilibrium is reached in the regulator 13.

When the material speed increases, the sequence of actions of the device elements: is saved only instead of the selector 19 the selector 20 operates.

Claims (1)

Invention Formula Device for automatic control of operating parameters for installation of vertical pipeline pneumatic transport of bulk material, comprising interconnected flow sensor and pressure regulator I.Casard Editor. Order 6108/22 Compiled by G. Kiseleva Tehred L. Serdyukova Proofreader I. Musk Circulation 776 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, 4. air flow and load cell and pressure regulator; additional air flow; actuators of main and additional air flow connected to the corresponding pressure regulator; pressure pulsation sensor at the control point of the vertical pipe connected to the pressure regulator and pressure regulator On the bypass line of the main air flow, characterized in that, with the aim of increasing the regulation accuracy, it is equipped with two selectors, an adder and The pressure sensor, while the output of the pressure pulsation sensor is connected to the inputs of the selectors, the outputs of which are connected to the first and second inputs of the adder, the third input of which is connected to the output of the setpoint generator, and the output to the second input of the pressure regulating pulsator.