US 2020/0009648 A1 · METHOD FOR CONVEYING CONTAINER, DEVICE FOR CONVEYING CONTAINER, AND METHOD FOR CONVEYING LADLE

Abstract

A method for calculating a conveyance velocity at which oscillation of a liquid surface is suppressed in conveying a container in which a liquid is accommodated, e.g., a ladle in which molten metal is accommodated. In a graph of conveyance velocity versus conveyance time, an upwardly convex parabola and a downwardly convex parabola having vertical symmetry are prepared in advance, the downwardly convex parabola and the upwardly convex parabola are smoothly connected to form an acceleration curve, the upwardly convex parabola and the downwardly convex parabola are smoothly connected to form a deceleration curve, and the conveyance velocity is obtained from the acceleration curve and the deceleration curve smoothly connected where the slope thereof is zero.

Claims8

Dependent claims

A method for conveying a container, comprising:

starting a conveyance by accelerating the container containing a liquid in a horizontal direction;
and
decelerating the container to complete the conveyance, wherein
a conveyance velocity v(t) of the container, which is a function of time t, is represented by:
Formula 1 when 0≤t≤(t0/4)
v(t)=a·t2 [Formula 1]
Formula 2 when (t0/4)≤t≤(3t0/4)
v

(
t
)
=
-
a
·
[
(
t
-
t
0
2
)
2
-
t
0
2
8
]
[
Formula


2
]
Formula 3 when (3t0/4)≤t≤(t0)
v(t)=a·(t−t0)2 [Formula 3]
wherein ‘t0’ represents a time for conveying the container and ‘a’ represents a constant.

37 more elements

A conveyor control unit for conveying a container, which starts conveying by accelerating a container containing a liquid in a horizontal direction and completes the conveyance after deceleration, the conveyor control unit comprising:

a storage unit;
and
a control unit, wherein
the storage unit stores a conveyance time t0 of the container, a constant a, a maximum value of a rate of change of acceleration of the container αmax at which liquid surface oscillations after conveying the container is suppressed within a tolerable range;
the storage unit also stores a conveyance velocity of the container v(t), which is a function of time t as:
Formula 1 when 0≤t≤(t0/4)
v(t)=a·t2 [Formula 1]
Formula 2 when (t0/4)≤t≤(3t0/4)
v

(
t
)
=
-
a
·
[
(
t
-
t
0
2
)
2
-
t
0
2
8
]
[
Formula


2
]
Formula 3 when (3t0/4)≤t≤(t0)
v(t)=a·(t−t0) [Formula 3]
;
and
the control unit calculates the constant a from the rate of change of acceleration αmax stored in the storage unit and determines the conveyance velocity v(t) of the container.

40 more elements

Dependencies are inferred from the claim text.

Method for conveying container, device for conveying container, and method for conveying ladle

Life of this patent

Method for conveying container, device for conveying container, and method for conveying ladle

Life of this patent

Abstract

Claims8