SU988719A1 - Apparatus for controlling speed of container trains in pipeline of pneumatic transport installation - Google Patents

Description

 (54; DEVICE FOR REGULATING THE SPEED OF MOTION OF CONTAINER COMPOSITIONS IN THE PNEUMATIC INSTALLATION PIPELINE

one

The invention relates to pipeline container pneumatic transport, in particular, to devices for controlling the speed of movement of container compositions in a pipeline of a pneumatic transport installation .5

A device for controlling the speed of movement of containers in a pipeline of a pneumatic conveying installation is known, which contains containers passing sensors along the pipeline and interacting with containers passing through it and connected to an input of a control signal generator, the output of which is connected to an actuator. In this device, the driver control op-. is determines the speed of the containers and the deviation from the given speed gives a signal to the actuator, which regulates the operation of the damper actuator on the air release line (1.

This device provides for the regulation of the movement of containers with the dispersion of parameters, however, when air leaks through the discharge line, the speeds of the trains passing through

the air discharge point, and the speeds of the compositions that have not reached this point increase. This reduces the distance between the compositions located on opposite sides of the air discharge point.

The aim of the invention is to maintain the average speed of all the compositions of the containers in the pipeline, and to provide the necessary time interval for their exit from it.

This goal is achieved by the fact that the control signal generator contains a container composition counting unit, a unit for selecting the number of operating units of the blower station and a unit for selecting rotational speed of turbines for the units of the blower station, and the output of the container composition counting unit is connected to the inputs of the unit for selecting the number of operating units for the blower station and unit selection of the rotational speed of turbines of the units of the blower station, and the input of the container counting unit of the containers is connected to the sensors of the passage of the compositions of containers, located at distances from the beginning and end of the pipeline in the direction opposite to the direction of movement of the container compositions, equal to the average distances traveled by the container compositions during the time resulting from the control action of the blower station and the propagation time of the disturbance in the gas flow from the sensors prior to the start of the pipeline, while the output of the unit for selecting the number of operating units of the blower station is connected to the actuator and to the input of the unit for selecting the rotational speed of the tour yn blowing station units, whose output is connected to the actuating mechanism associated with each blowing station unit. The drawing shows a schematic diagram of the proposed device. In the pipeline 1 of the pneumotransport installation, the compositions of containers 2 moving along it are located. The pipeline is equipped with a blower 3 and a lock 4 stations and has an air discharge line 5 at the end of the air into the atmosphere. The blower (antsi 3 consists of 6 units of the same type Ktschtuk connected in parallel. The device for controlling the speed of container trains through the pipeline contains a unit 7 for counting the number of containers, 8 for selecting the number of operating units 6 for the rotation speed of turbine units 6 of the blower station and sensors 10 and 11 of the passage of the composition of containers located respectively at distances Xi and Xj from the end and beginning of the pipeline X, is the distance from sensor 10 to lin and discharge 5 of air into the atmosphere; Xg is the distance from sensor 11 to the line of discharge 12 of air into the atmosphere of the previous pipe line 13. Distances Xi and X2 are determined from the ratios X, (Tr +) Vi 2 (P +) V., (1) where t is the response time of the blower station R. to control actions (switching on and off units or changing the rotational speed of turbines of a unit of a blast station); L is the length of the pipeline; a is the average sound speed in gas; CJ is the average length pipeline gas flow rate; V,, Vjj - the average velocity of the compositions of containers in areas Xj and Xs, respectively From relations (1), we obtain the equalities V (1 1 l 1- / -. У -fpV .7 a-1-cJ OR, taking into account that a W, a. V, and, we get Gr +) V, X TpV2 Sensors 10 and 11 are connected to the inputs of blocks 8 and 9, the outputs of which are connected to the input of the actuator 14. Each unit 6 of the blower station is connected to the actuator 14. The speed of rotation of the turbines of the units 6 is assumed to be the same for all operating units. The output of block 8 is also connected to the input of block 9. The device operates as follows. When container trains 2 pass through sensors 10 or 11, signals from the latter arrive at the input of block 7, the number of container trains signaling a change in the number of vehicles moving in pipeline 1, trains and the need to change the operating mode of the blower station 3. It is assumed that in the pipeline in steady state there are N compositions, and a change in their number occurs both upwards and downwards. The signal from the output of block 7 is fed to the input of block 8 to select the number of operating units and to the first input of block 9 to select the speed of rotation of turbines of aggregates. According to the number of trains moving in the pipeline 1, for example, MD-f 1, in block 8, in accordance with the known functions 1 (1), the number of working aggregates K (1Чд-И) is selected. From the output of block 8, the signal goes to the second input of block 9 and to the first input of the actuator 14. In accordance with the values of Id + 1 and K (Nd –fl), in block 9, the rotational speed of the turbines running a, gregates oX K (Id -1- l), 1, where (K, N) is a known function of the number of aggregates K and the number of compositions N. C. The output of block 9 the signal arrives at the second input of the actuator 14. According to the values of K (Nd + 1) and ( N + 1), Id-L 1, the actuator sets the appropriate number of operating units 6 at the blower station 3 and the shaft is rotated and their turbines. After the time tp, i.e., by the time the next train enters the pipeline, the blower station moves to a new operating area. : If block 7 fixes 1 container trains moving in the pneumatic tubing, then according to this number, blocks 8 and 9 and actuator 14 bring the number of working units at the blower station 3 to K (MD-1) and set the rotation speed of the turbines of these units equal to with K / Nd- 1. After time, the blower station switches to a new mode of operation, and after another

Claims (1)

Claim A device for controlling the speed of movement of container compositions in the pipeline of a pneumatic conveying installation, comprising sensors for passing the composition of containers located along the pipeline, connected to the input of a control signal generator, the output of which is connected to an actuator, characterized in that, in order to maintain the average speed of all container compositions located in the pipeline, and providing the necessary time interval for their exit from it, control signal generator comprises a container composition counting unit, a number of operating units of the blower station operating unit and a turbine unit speed selection unit of the blower station units, and the output of the container composition counting unit is connected to the passage sensors of container compositions located at distances from the beginning and end of the pipeline in the direction opposite to the direction of movement container compositions, 15 equal to the average distances traveled by the container compositions during the time, consisting of the reaction time of the blower station on the control action and the propagation time of the disturbance in the gas flow from the sensors to the start of the pipeline, while the output of the unit for selecting the number of operating units of the blower station is connected to the actuator and to the input of the unit for selecting the speed of rotation of the turbines of the units of the blower station, the 25 output of which is connected to the actuator with each unit of the blower station.