JPS58188234A - Fixed quantity feed controller - Google Patents

Abstract

PURPOSE:To realize a high accurate fixed quantity feed in a storage mining machine, by detecting a load current of a motor driving a bucket wheel and converting its detected value to a corrective amount level of speed instruction to correct a fixed amount feed instruction. CONSTITUTION:A primary load current of a motor 103 for driving a bucket wheel is picked up by an inverter 101 and auxiliary inverter 102, rectified by a rectifier 104, adjusted by a resistor 105 and detected. This detected value is regulated with a gain by an operation amplifier 107 to become a speed instruction corrective amont alpha. This amount alpha is fed back to a turning speed control circuit. Even if an error is provided in a signal generated from a turning speed instruction function generator 109, a corrective circuit as shown by a 2-dot chain line in the drawing is added to correct the signal to a certain level. That is, in case of large amount of gathered ores, a turning speed of a boom turning motor 116 is decreased by speed control units 110-115, 117. Reversely in case of small amount of gathered ores, the turning speed is increased to control gathering always to a specified amount.

Description

[Detailed description of the invention] Using a packet wheel provided at the tip of the boom,
The present invention relates to a control device for an ore storage and mining machine that mines objects to be discharged such as raw materials in a yard and regularly discharges them to an on-machine conveyor.

Conventionally, fixed-stitch payout control has been implemented for ore storage and mining machines, but as shown in Figures 1 and 2, if the same angle of the boom changes, the rotation speed will be adjusted according to the rotation angle. It is a control that changes the In other words, if the turning speed when the turning angle is 06 is vo1, then the turning speed vv is given by the COSψ function of -vos e cψ, and as the turning angle increases, the turning speed increases, and vice versa. When the turning angle becomes smaller, the turning speed is reduced to make the area of the ore to be collected into a "storehouse."

Since the turning speed V in this conventional method is given by □, it is determined by the amount of If'i to be cut in the forward direction and backward direction. The drawback of this conventional method is that if the initially set travel depth is not appropriate, the payout will be 9 units of time! ! (11 for TON/HRI!
, the result is that the number of subjects taken is too high, or that there are not enough samples. Therefore, in order to obtain the prescribed value of TON/)IFL, it is necessary to sample a certain degree of cutting, and if it is not suitable, it is necessary to change the setting of the travel depth again. This results in very poor efficiency.

An object of the present invention is to provide a stationary dispensing control device that can realize quantitative dispensing with higher precision.

In order to achieve the above object, the present invention detects the load DC of the motor that drives the packet wheel, converts this detected value into a level-converted speed command correction value, and uses the converted speed command correction amount to command a stationary payout command. The system is configured to correct the following. This allows for accurate stationary dispensing even if there is a setting error in the travel depth of cut. 1ltl$lI can be done.

The principle of this invention is based on the fact that the current (-current) flowing through the packet wheel drive motor (a through induction motor is used) is approximately proportional to the amount of cut into the raw material, which is the object to be dispensed. Take advantage of. In other words, the load 1tf flowing to the drive motor of the packet wheel is
If i increases, it is determined that the amount of the packet wheel cutting into the raw material is large (in other words, too much raw material has been extracted), and the swing motor (A normal DC motor is used) is changed to lower the swing speed of the boom. control.On the contrary, load lt
If the flow becomes small, it is determined that the amount of raw material to be collected is small, and the rotating motor is controlled to increase the rotating speed.

Hereinafter, the present invention will be explained in detail with reference to specific examples. This IA implementation is shown in FIG.

Further, the packet wheel portion is shown in FIG.

Furthermore, Figure @4 shows the relationship between the slip of the induction motor and the load DC 6.

First, in Figure 3, 1 is the packet wheel.
It is rotated in the direction 4 to discharge the object 3 to be discharged (raw material, etc.). An on-machine conveyor is used to transport the objects discharged by the two-packet wheel 1. 5
indicates the same direction as the boom. In this figure, the description of the motor for driving the packet wheel 1 and the motor for rotating the zoom (not shown) is omitted.

Next, in FIG. 5, there is shown a motor for driving the 103 packet wheels 1, and here an induction motor (IM) is used.

116 is a motor for rotating the boom, and here a direct current motor (DCM) is used.

101 is a current transformer, and 102 is an auxiliary current transformer. 1
06 is a rectifier, which is a 6J resistor for 105 adjustment. By 101, 102, 104 and 105,
It constitutes a current detector that detects the load current (C-order current) of 1M103. 106 is a resistor (variable resistor), and lO7 is an operational amplifier. These 106 and 107 constitute a level converter. The output of this converter becomes the speed command correction amount. 10B is a turning angle detector, 10
9 is a speed command function generator that outputs the turning speed I& command. The output of the function generator 109 is combined with the speed command correction amount by an adder, and becomes a speed command for the motor 116. 1
10 is automatic speed decreaser 11iI regulator (A8FLl, 111 automatic current regulator (ACRI, 112Vi self-effect pulse phase shifter 5
(APPS1, 114 is a current transformer, 113 is a diode for 41, 115 is a silice power supply, and 117 is a speed detector (PG).

110 to 115 and 117 are speed control # parts of the DCM 116. The configuration of this part of the A-degree system is well known as a Leonard thyristor.

In the actual example shown in Figure @5, the primary load 11L flow of the motor 103 for driving the packet wheel is taken out by 101° 102, rectified by the @flow device 104, adjusted by 105, and the load 'It flow is detected. . The gain of this detected value is adjusted by the intensifier II device 107, and becomes the speed command correction amount α.

This correction amount α is fed back to the turning speed control circuit. By adding the repair circuit shown by the two dots @ line in this figure,
Even if there is an error in setting the travel depth for the first time in the valley, that is, Baizono speed command 114Ia will be generated! Even if there is an error in the signal generated from 109, the signal is corrected and the V in FIG.
- As shown in the graph, the COSψ will be controlled as the turning speed lfv + α. In other words, when there is a large amount of ore to be extracted, the rotation speed is controlled to be lowered and the specified number of spears are collected; conversely, when there are less ore to be extracted, the rotation speed is increased and the control is performed so that the specified number of spears are always collected per unit time. Sha's payout t(T
ON/HFt) control can be realized.

According to the present invention, the following effects can be obtained compared to conventional control methods.

Even if there is an error in setting the speed cutting depth, the system can be used without having to redo the turn or change the traveling cutting depth setting.
Since the turning speed is automatically controlled, fixed amount payout is performed with high precision. Therefore, there is no wasted time, and the work can be efficiently and quickly dispensed. This also reduces waiting time for ships, etc., and reduces costs.

[Brief explanation of drawings]

Figure 1 is a diagram showing the relationship between the running direction and the turning angle;
The figure shows the relationship between the swing angle and the swing speed during mining fixing and unloading operation, Figure 3 shows the relationship between the packet wheel and the ore cut, and Figure 4 shows the slip of the induction motor and the primary load current. FIG. 5 is a circuit diagram showing the principle of the quantitative dispensing control device of the present invention. 1...Packet wheel, 2...4. h Boom conveyor, 3... Iron ore, 4... Packet wheel rotation direction, 5... Evening direction, 6... - Vacant load current, 10
1... Current transformer, 102... Auxiliary current transformer, 103...
・Indakunyong motor, 104... Rectifier, 105
．． 106... Resistor, 107... Operational amplifier, 10
8...K angle detector, 109...Vehicle degree command function generator, 110...ASI (. 111...Person CR, 112...APPS, 11
3...Diode, 114...Current transformer, 115...
・Thyristor electric, phi $2 eyes 3 eyes 4 days/, 2 σ/ 5=θ --- Susoso 7' 5

Claims (1)

[Claims] 1. A control device for a facility that collects objects to be discharged piled up in a yard using a packet wheel installed at the tip and discharges them to an on-board conveyor, which corresponds to the applicable Jl! The device t includes a speed command function generator that manually adjusts the rotation angle of the boom and outputs a speed command for the motor that drives the boom, and a device t that detects the negative current of the motor that drives the packet wheel. a detector, a level converter that adjusts the power of the lit current ratio detector to fJ# and outputs a speed command correction amount, and combines the output of the speed command function generator and the output of the level converter. A 7fil payout control device comprising: an adder; and a speed control section that controls the speed of a motor that drives the boom by using the output of the adder as a speed command for the motor that drives the boom.