JPS5940883B2 - automatic fluid release device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically discharging a fluid such as hot metal in a fixed amount.

For example, when discharging hot metal from a pig iron mixer car, conventionally the operator manually operated the controller of the tilting motor of the pig iron mixer to maintain a constant flow rate while visually checking the amount released. When a fixed amount was reached, the discharge flow rate was reduced by tilting operation, and when the fixed amount was reached, the tilting rotation was resumed and the discharge of hot metal was stopped.

As described above, in the past, the process of discharging molten metal was very dangerous because it required manual confirmation and judgment, and the quantitative discharging operation required considerable skill. The reason why the discharge flow rate of the hot metal is set to a relatively large constant flow rate at the initial stage as described above is to allow the hot metal to be filled into the ladle, etc., at the speed that is allowed from a safety point of view.

The reason why the discharge flow rate is reduced in the latter stage is to minimize the error in determining the final discharge amount. The present invention automatically performs a fixed discharge operation by switching the discharge flow rate into two stages as described above, or a fixed discharge operation by switching the discharge flow rate into three stages as described later with reference to FIG. The purpose is to save labor and improve safety.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic fluid discharge device according to the present invention will be described below with reference to FIGS. 1 and 2. 1 is a pig iron mixing car, and hot metal is accommodated in the furnace body.

2 is a reversible motor for tilting and returning the furnace body.

3 is a hot metal ladle for receiving hot metal discharged from the furnace body of the pig iron mixing wheel 1.

Reference numeral 4 denotes a hot metal truck weighing machine, which is used to weigh the hot metal pot 3 placed on a platform.

5 is a remote metering section installed in the remote control panel.

Reference numeral 6 denotes a computing unit which inputs the measured value of the hot metal discharge amount outputted from the remote measuring section 5 and detects the weight change rate in the hot metal ladle 3, that is, the hot metal discharge flow rate.

7 is a comparator that compares the set value of the predetermined release amount setting device 8 and the measured value of the hot metal release amount of the remote metering unit 5, and when the hot metal release amount reaches a predetermined value before quantification, sends a pre-quantification signal; When a quantitative value is reached, a quantitative signal is sent.

Reference numeral 9 denotes a predetermined discharge flow rate command transmitter, which receives the pre-quantification signal outputted from the comparator 7 and transmits a discharge flow rate command value corresponding thereto.

Reference numeral 10 denotes a tilting speed command transmitter, which transmits a tilting speed command according to the difference between the discharge flow rate command value of the discharge flow rate command transmitter 9 and the discharge flow rate detection value of the calculator 6.

Reference numeral 11 is a motor controller, which controls motor 2 according to the tilting speed command.
The motor 2 is reversely rotated in response to a quantitative signal from the comparator 7, and the tilting of the furnace body of the pig iron mixer 1 is returned to the zero angle position.

Next, the operation will be explained.

Assume that the predetermined release amount is set to Ws, and the release amount before the predetermined amount is set to two levels, W1 and W2. While the weight in the hot metal ladle 3 is smaller than W1, the discharge flow rate command transmitter 9 transmits a command value for the discharge flow rate q1, and the motor 2 The tilting of the is controlled. When the discharge flow rate increases and reaches q1, the tilting speed command transmitter 1
A tilting stop command is issued from 0, the tilting of the furnace body of the pig iron mixer 1 is stopped, and discharge continues at the tilting angle at that time. If X discharge continues at this tilt angle, the level of hot metal in the pig iron mixer 1 decreases, and the discharge flow rate gradually decreases. When the discharge flow rate becomes q1 or less, a tilting command corresponding to the difference between the discharge flow rate value and the discharge flow rate command value q1 is sent to the tilting speed command transmitter 10.
The furnace body of the pig iron mixer car 1 further tilts as the discharge flow rate increases again, and the tilting stops when the flow rate exceeds q1. Thereafter, the above operation is repeated, and when the hot metal discharge amount reaches the first set value W1, the command from the discharge flow rate command transmitter 9 is the discharge flow rate q1.
The discharge flow rate is switched to a smaller value Q2, the tilting is returned to the return direction, and the discharge flow rate is gradually reduced. When the discharge flow rate falls below Q2, the discharge flow rate begins to increase again, and when the discharge flow rate exceeds Q2, the tilting stops. Thereafter, the same operation as the control in q1 is repeated.
Next, when the hot metal discharge amount reaches the second set value W2, the command value of the discharge flow rate is switched from Q2 to an even smaller value Q3. In this case as well, the same operation as in the case of the command values Ql and q2 is repeated. When the amount of hot metal released reaches a predetermined value Ws, a quantitative signal is input from the comparator 7 to the motor controller 11, and the motor 2 immediately returns the tilting of the pig iron mixer 1 to the zero angle position, and the hot metal is released. Stop. In addition, in the above embodiment, the reason why the flow rate Q2 is discharged from when the discharge amount exceeds W1 until it reaches W2 is because if the flow rate is suddenly switched from q1 to Q3, the transition period of switching and the operation of the metering section will be affected. This is because the amount released may exceed the set value until the amount stabilizes.

In the above embodiment, the discharge flow rate is controlled in three stages, but the control is not limited to three stages, and two-stage control may be performed in relation to the predetermined amount release time.

Furthermore, although the amount of hot metal discharged is measured by the hot metal truck weighing machine 4, it is also possible to measure the weight of the pig iron mixing car 1 with the weighing machine 12 and use the amount of decrease in that weight as the amount of hot metal discharged. can. As described above, according to the automatic fluid discharge device according to the present invention, it is possible to automatically discharge a fixed amount of hot metal from a pig iron mixing car, thereby making it possible to save labor and improve safety.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of one embodiment of the automatic fluid discharging device according to the present invention, and FIG. 2 is a characteristic diagram showing the operating state of the device shown in FIG. 1...Pig mix car, 2...Motor, 5...
...Remote measurement section, 6... ．．・Arithmetic unit, 7...
... Comparator, 9 ... Release flow rate command transmitter, 1
0...Tilt speed command transmitter, 11...
Motor controller.

Claims (1)

[Claims] 1. A container that contains a fluid and tilts to release the fluid;
a tilting drive unit that tilts the container; a measuring unit that measures the amount of fluid released; a comparator that compares the measured fluid release amount with a set value of the fluid release amount; a transmitter that transmits a fluid discharge flow rate command; a calculator that inputs the measured fluid discharge amount output from the measuring section and calculates the fluid discharge flow rate at that point; and a calculator that calculates the fluid discharge flow rate at that point in time; a mechanism that compares command values and operates the tilting drive section according to the comparison value to change the tilting angle of the container; and a mechanism that operates the tilting drive section when the comparison value of the comparator reaches a predetermined value. An automatic fluid discharge device comprising a mechanism that is operated to return the tilted container to its original position.