JP2559050B2 - How to operate a conveyor that goes through a relay tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a relay tank, which is temporarily charged from a raw material yard such as an iron mill through a conveyor transportation line into a relay tank and then discharged from there to a downstream conveyor transportation line. It is related to the transit system.

[Conventional technology]

FIG. 2 shows a conventional transport system via a relay tank. Reference numeral 1 is a relay tank, 2 is a quantitative cutting device, 3 is a tank level meter, and 4 to 7 are belt conveyors.

In the conventional transportation system shown in FIG. 2, the relay tank 1
The relay tank 1 is charged by operating a conveyor transport line on the upstream side, and is charged until the level meter 3 in the relay tank 1 operates, that is, until it is in a full state.

When the inside of the relay tank is full, the conveyor transportation line upstream of the relay tank is stopped, the operator judges that there is no more raw material in the relay tank 1, and the next operation is performed.

Then, the conveyor transportation line downstream from the relay tank 1 always continues to operate regardless of the presence or absence of the raw material in the relay tank, and the operator judges it according to the state of the next step and stops it.

[Problems to be solved by the invention]

According to the conventional operation method, the conveyor transportation line downstream from the relay tank 1 is always operating regardless of the presence or absence of raw materials in the relay tank, so that the idle time of each conveyor 6 and 7 is long and the power consumption is low. There is a problem that is not effectively used.

In addition, the conveyor transportation line downstream of the relay tank performs constant quantity cutting by the constant quantity cutting device 2, but since it always operates regardless of the presence or absence of raw materials in the relay tank, However, there is a problem that quantitative cutout becomes impossible depending on the storage amount.

In other words, there is a problem that the cutout amount is different when the storage amount is near full and when it is near empty.

Also, if the operator tries to operate or stop the conveyor transportation line downstream from the relay tank, the operation will be complicated because the operation is stopped while checking the storage amount in the relay tank. There is a problem.

Therefore, the present invention, when the storage amount in the relay tank reaches the upper limit level set in the setting unit, operates the transportation line of the conveyor downstream from the relay tank, and when the storage amount reaches the lower limit level, The present invention aims to provide a transportation system for stopping a conveyor transportation line via a relay tank.

[Means for solving problems]

The present invention was made in order to solve the above-mentioned problems, and is equipped with an input amount measuring unit for measuring the tank input amount of a raw material on a conveyor upstream from a relay tank, and a relay tank downstream from the relay tank on the conveyor. Equipped with a cutting amount measuring unit for measuring the amount of raw material cut out from the operation unit for adding or subtracting the difference between the input amount and the cutting amount, and operating the conveyor transportation line downstream from the relay tank.
The configuration is provided with a storage amount setting unit in the relay bunker for setting the storage amount in the relay tank to be stopped.

[Work]

The storage amount in the relay tank set by the setting unit is compared with the storage amount in the relay tank calculated in the calculation unit, and the calculated storage amount in the relay tank is set to the upper limit level of the set storage amount. If it exceeds, the conveyor downstream from the relay tank is operated, and
When the storage amount in the relay tank falls below the lower limit level of the set storage amount, the conveyor downstream from the relay distance is stopped.

Then, when setting the lower limit level of the storage amount in the relay tank, if the next relay tank is of the same type as the name of this time, the lower limit level is set so that a certain amount remains This enables the fixed amount of the attached cutting device to be cut out.

In addition, if the next time the tank is introduced is different from the brand introduced this time, the lower limit level of the storage amount is set to 0 to prevent the brands from being mixed.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which 1 is a relay tank,
2 is a cutting device, 3 is a tank level meter, 4 to 6 are conveyors,
Reference numeral 8 is a charging amount measuring unit provided on the conveyor 5, and 9 is the conveyor 6.
Is a cutting amount measuring unit, 10 is a calculating unit, and 11 is a setting unit.

Now, with no raw material in the relay tank 1, a conveyor upstream of the relay tank 1 is operated by an operation command by an operator.
When 4,5 are operated and the raw material is charged into the relay tank 1, the amount of the raw material charged into the relay tank 1 is measured by the charging amount measuring unit 8 provided in the conveyor 5.

At this time, the conveyors 6 and 7 and the cutting device 2 downstream of the relay tank 1 are stopped, and the cutting amount measuring unit provided on the conveyor 6 indicates the cutting amount 0.

Therefore, the input raw materials are added in the calculation unit 10 and the storage amount in the tank gradually increases.

When the in-tank storage amount reaches the in-tank storage amount set by the setting unit, the conveyors 6 and 7 and the cutting device 2 downstream of the relay tank start operating from the upstream side.

Then, the cut amount measured by the cut amount measuring unit 9,
The difference between the input amounts measured by the input amount measuring unit 8 is added or subtracted as the storage amount in the tank.

Then, when the cutout amount> the input amount, the storage amount in the tank gradually decreases, and finally reaches the set lower limit level, and the conveyor downstream from the relay tank stops operating. At this time, the raw materials are stopped sequentially from the upstream side so that no material remains on the conveyor.

When the input amount> the cutout amount, the storage amount in the tank gradually increases, and then the level meter 3 in the tank operates, and this signal causes the conveyors 4 and 5 upstream of the relay tank 1 to interlock. To do.

After this, since only cutting is performed, the storage amount in the tank gradually decreases, and when the set lower limit level is reached, the conveyors 6, 7 downstream of the relay tank 1 are processed by the method described above.
Also, the cutting device 2 is stopped and the operator is informed by a message or the like that the tank storage amount has reached the lower limit level.

If necessary, the operator again operates the conveyors 4 and 5 upstream of the relay tank to load the raw materials.

In addition, when the next time the tank is introduced is different from the brand introduced this time, the lower limit level is set to 0 to prevent the brands from being mixed.

In this case, the operator operates the cutting device 2 and the conveyors 6 and 7 downstream of the relay tank to detect the lower limit level, and the cutting amount measuring unit detects the cutting amount of 0, so that the inside of the relay tank Judging the storage amount 0, it is possible to input different brands next time.

When the in-tank level meter 3 operates, or when the cutting amount measuring unit detects the cutting amount 0 continuously for several seconds, the storage amount calculated by the calculating unit is attached to the relay tank capacity and the level meter, respectively. Preset to a value determined by the position or 0.

〔The invention's effect〕

As described above, according to the present invention, since the operation of each conveyor downstream from the relay tank is stopped by the storage amount in the relay tank, the idle operation of the conveyor in the state where there is no raw material in the relay tank is eliminated, and the conveyor is also Since the raw materials are sequentially operated and stopped from the upstream side in accordance with the movement of the above raw materials, efficient conveyor operation can be achieved, and there is a great effect that the amount of electric power consumed to operate the conveyor is reduced.

[Brief description of drawings]

 FIG. 1 is a schematic diagram showing an implementation state of a method of the present invention. FIG. 2 is a schematic diagram showing an implementation state of a conventional method. 1 ... Relay tank 2 ... Cutting device 3 ... Tank level meter 4-6 ... Conveyor 8 ... Input amount measuring unit 9 ... Cutting amount measuring unit 10 ... Calculation unit 11 ... Setting unit

Front page continuation (72) Daisuke Axida, 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (without street number) Inside the Mizushima Steel Works, Kawasaki Steel Co., Ltd. No address) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Shigenori Onishi 1-chome, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works (56) Reference JP-A-58-100014 (JP, A) Actually developed 59-33829 (JP, U)

Claims (1)

(57) [Claims] 1. A transportation system via a relay tank equipped with a quantitative cutout device for feeding a raw material from a raw material yard into a relay tank via a conveyor transportation line and discharging the raw material from the lower portion of the relay tank to the next conveyor transportation line, An input amount measuring unit for measuring the input amount of the load in the relay bunker, an amount measuring unit for measuring the amount of raw material cut out, and an arithmetic unit for adding or subtracting the difference between the input amount and the output amount, A relay tank storage amount setting unit for setting a storage amount in the relay tank for operating a conveyor transportation line downstream from the relay tank, and when the storage amount in the relay tank falls below a set lower limit level, the relay tank The first feature is to sequentially stop the conveyor transportation line on the downstream side from the conveyor on the upstream side. When setting the lower limit level, if the next relay tank input is the same as the current issue, the relay tank Gura that remains in a small amount By setting the lower limit level to, it is possible to quantitatively cut out the lower part of the relay tank, and if the next relay tank input is different from the brand entered this time, the lower limit level is set to 0 to prevent mixture of brands. A third feature is that when the storage amount in the relay tank calculated by the calculation unit exceeds the set upper limit level, the conveyor transportation line downstream from the relay tank is sequentially operated from the upstream conveyor. How to operate a conveyor that goes through a relay tank.