RU2083462C1 - Method of distribution of material between service containers - Google Patents

Abstract

FIELD: materials handling; cyclic alternate charging of containers from common channel. SUBSTANCE: mass and consumption of material in each container are measured, capacity of common charging channel is determined additionally and summary consumption of material and summary mass of material in containers are found. According to proposed method, charging of material into each container is carried out during time calculated by following formula

where Q_in - capacity of common charging channel; T-duration of material distribution cycle; Q-consumption of material from its container; M-mass of material in jth container at beginning of cycle;

-summary consumption of material from containers;

Description

 The invention relates to the field of control and can be used for the rational distribution of material / or products / between consumer containers.

где t_с.б.-время пребывания шихты в смесительном барабане;
Q_j расход шихты из j того бункера;
K_j коэффициент заполнения j -того бункера;
N количество бункеров.Known / Aut. St. USSR N539967, class С 22 В 1/00, 1976 / method of distribution of a charge between containers, which consists in measuring the charge of them, material levels and generating signals corresponding to the degree of filling of containers and loading of material into each container over time

where t _sb -the residence time of the mixture in the mixing drum;
Q _j charge consumption from j of that hopper;
K _j the fill factor of the j-th hopper;
N number of bins.

 The closest analogue of the invention is a method of distributing material between consumable containers, which consists in the fact that the latter are cyclically periodically loaded from the common loading path according to the results of measuring the mass of material in each container and the material flow from it / cm. Prince RI Sigua "Automated control of the processes of concentration and algomeration of iron ores and concentrates", M. "Nedra", 1989. p.66 /.

According to the known method, the loading of material into each expendable container is carried out for a time that is a value directly proportional to the capacity of the container Q _j and inversely proportional to the mass of the material in it M _j .

где K- коэффициент пропорциональности /К= 0,1-0,2/.

where K is the coefficient of proportionality / K = 0.1-0.2 /.

 The disadvantage of this method is that it does not take into account the performance of the common loading path, as well as the productivity and mass of the charge in the remaining bins. Therefore, the distribution of the charge between the bins is not rational.

 A common disadvantage of the known methods is that they do not provide equal for all bunkers stock of the charge at the time of its development.

 The aim of the invention is to ensure equal in time development of stocks of material in all containers.

где Q_вх- производительность общего загрузочного тракта;
T длительность цикла распределения материала;
Q_j -расход материала из j -той емкости;
Mj_o -масса материала в j-той емкости в начале цикла;

-суммарный расход материала из емкостей;

-суммарная масса материала в емкостях в начале цикла;
N -количество накопительных емкостей.This goal is achieved by the fact that they additionally measure the performance of the common loading path and before the start of each loading cycle, determine the total material consumption from them and the total mass of material in the tanks, and the material is loaded into each tank over time

where Q _I - the performance of the total boot path;
T is the duration of the material distribution cycle;
Q _{j is the} consumption of material from the j-th tank;
Mj _{o is the} mass of material in the j-th tank at the beginning of the cycle;

-total consumption of material from containers;

-total mass of material in containers at the beginning of the cycle;
N is the number of storage tanks.

 In the group of consumable containers, the material continuously enters through the common loading path and is periodically distributed between them using the loading device. From each container, the material is continuously dispensed to the respective consumer.

где M_j т масса материала в емкости в конце цикла распределения;
Q_j -расход материала из емкости.The stock of material in the supply tank is traditionally estimated by its mass, i.e., absolute units. However, in some cases, a more informative indicator of the stock of material is the time of material production, during which the material is delivered from the tanks at a constant flow rate and without the influx of material into the tank. The production time of material from the j-th tank is

where M _j t the mass of material in the tank at the end of the distribution cycle;
Q _{j is the} consumption of material from the tank.

 The use of production time when estimating material stocks is appropriate for a group of tanks with different material costs. To ensure the same production time in this case, the mass of material in the tank with a large flow rate should be correspondingly large.

 In the described method, the criterion for the optimal distribution between consumable containers is the equality of the time of production of the material for all containers. The condition for N capacities is expressed as.

масса материалов во всех емкостях в конце цикла;

общий расход материала из всех емкостей.t _1B = t _2B = t _3B = t _jb = t _NB (2)
t _j = t _B , (3)
where t _B = M _t / Q _out - the time of development of the material from all containers;

weight of materials in all containers at the end of the cycle;

total material consumption from all containers.

Для обоснования оптимальных значений времен загрузки материала в каждую из емкостей рассмотрим уравнение материального баланса. Масса материала в j
той емкости в конце цикла распределения M_j т. зависит от массы материала в начале цикла M_j о, производительности загрузочного тракта Q_BX, времени загрузки материала в данную емкость Q_j и расхода материала из емкости Q_j:
M_jт=M_j o + t_j• Q_вх-TQ_j (5)
Из уравнения /5/ следует, что:

как следует из уравнения /1/ и /3/, масса материала j той емкости в конце цикла должна быть равна

Общая масса материала в емкостях в конце цикла M_t зависит от общей массы материала в начале цикла M_o, а также от рассогласования между производительностью загрузочного тракта Q_вх и общим расходом материала из всех Q_вых:
M_т=M_о+T/Q_вх-Q_вых
где

сумма масс материала M_j o в емкостях в начале цикла.The specified condition is achieved by selecting the optimal loading times of the material in each of the containers. Loading times are determined before the start of each material distribution cycle. The sum of the loading times t _{j of} all containers is equal to the cycle time of the material distribution:

To justify the optimal values of the loading times of the material in each of the containers, we consider the equation of material balance. Mass of material in j
of the capacity at the end of the distribution cycle M _j t. depends on the mass of material at the beginning of the cycle M _j о, the productivity of the loading path Q _BX , the time of loading of the material into this tank Q _j and the material flow from the tank Q _j :
M _j t = M _j o + t _j • Q _in -TQ _j (5)
From the equation / 5 / it follows that:

as follows from the equation / 1 / and / 3 /, the mass of material j of that capacity at the end of the cycle should be equal

The total mass of material in containers at the end of the cycle M _t depends on the total mass of material at the beginning of the cycle M _o , as well as on the mismatch between the productivity of the loading path Q _in and the total material consumption from all Q _out :
M _t = M _o + T / Q _in -Q _out
Where

the sum of the masses of material M _j o in containers at the beginning of the cycle.

а оптимальное время загрузки материала в j -тую емкость /6/ выражается в виде:

При распределении материала по предложенному способу в конце цикла обеспечивается наличие таких масс материала, что времена его выработки оказываются одинаковыми для всех емкостей.Given equation / 8 / equation / 7 / is converted to

and the optimal loading time of the material in the j-th capacity / 6 / is expressed as:

When distributing the material according to the proposed method at the end of the cycle, the presence of such masses of material is ensured that the times of its development turn out to be the same for all containers.

 The drawing shows a system explaining the proposed method.

 To implement this method, a system containing a group of consumable containers 1, a loading device 2, equipped with a meter 3 of its position, a meter 4 of the mass of material in the containers, a control device 5, meters 6 and 7 of the material consumption on the common loading path and material from the containers and can be used computing device 8.

 The operation of the system is as follows.

 Material loading in the tank 1 is carried out by the loading device 2, cyclically moving above the tanks. From containers, the material is continuously issued to the respective consumers. The control of the masses of material in the containers and the flow rates of the material from the containers is performed by meters 4 and 7. The consumption of material on the common loading path is controlled by the meter 6. The position of the loading device is controlled by the meter 3. The signals of all meters are fed to the computing device 8, the output of which is through the control device 5 is associated with a drive for moving the boot device 2.

 In the computing device 8, before the start of each cycle, signals are generated corresponding to the total value of the masses of material in the containers and the total consumption of material from the containers. Based on these signals, as well as data on the number of loaded containers N and the distribution cycle time T in the computing device, the necessary loading times of the material in each of the containers are determined.

 At the beginning of the cycle from the computing device 8 to the input of the control device 5 receives a control signal that determines the direction of movement of the boot device. The boot device 2 moves to the next in the order of loading the storage capacity. According to the signal of the position meter 3, indicating that the loading device is above the indicated capacity, the control signal is removed, the loading device stops and loads the material into the container. After the optimal loading time has elapsed, a signal is received from the computing device, through which the loading device is moved to the next capacity. After loading all containers, the material distribution cycle is repeated.

 Using the proposed method provides an optimal distribution of material between storage tanks, which eliminates interruptions in the supply of consumer material.

 Creation of material stocks in storage tanks that are identical in time of their production allows temporary shutdowns of the loading path / for example, for prophylaxis or repair / without disrupting the supply of consumer material.

Claims (1)

The method of distribution of material between consumable containers, which consists in the fact that the latter are cyclically periodically loaded from the common loading path according to the results of measuring the mass of material in each container and the material flow from it, characterized in that they additionally measure the performance of the common loading path and before the start of each loading cycle containers determine the total consumption of material from them and the total mass of material in containers, and the loading of material into each container is performed over time

where Q _{in x} is the overall boot path performance;
T is the duration of the material distribution cycle;
Q consumption of material from the j-th tank;
M is the mass of material in the j-th tank at the beginning of the cycle;

total consumption of material from containers;

total mass of material in containers at the beginning of the cycle;
N number of consumable containers.