SU393610A1 - - Google Patents

Description

DEVICE FOR WEIGHING THE MOUNTAIN MASS IN BODY

CAR TRUCKS

one

The invention relates to the mining industry and can be applied for the continuous weighing of the transported rock mass with the integrated accounting of the mixed volumes in open pit mining.

Devices for weighing rock mass in the body of a dump truck are known, including weight sensors and a tachogenerator.

However, such devices are not accurate enough and do not automatically weigh the rock mass directly during the loading process.

The proposed device is characterized in that, in order to improve the weighing accuracy, a multistable memory transformer is installed in the letters, to the erase winding of which a tachogenerator is connected through an amplifier, a circuit connected in series to a trigger amplifier, a waiting multivibrator and a key whose output is connected to the recording winding of a multi-stable receiver. and a transformer connected to the input winding of a multistable memory transformer. Moreover, the storage capacitor is connected to one of the key inputs, and the input windings of the transformer are connected to the weight sensors.

The block diagram of the device shown in the drawing.

For the purpose of operative weighing of materials, in the body of the vehicles, when they are loaded, weight sensors / –4 are installed between the spring and non-stem parts of the vehicle.

In this case, as the elastic element used springs or pneumatic cylinders of the car.

To avoid significant weighing errors arising from the non-horizontal installation of the car during loading, body pollution (sticking and freezing of the mountain mass in the autumn-winter period),

changing the initial position of the pistons of the pneumatic hydraulic cylinders, the principle of pre-storing the error signal level and its subsequent exclusion from the total measurement result was used.

This process, the preparation of the device for weighing and weighing occurs automatically. The output of the device receives an electrical signal proportional to the value of the net weight loaded in

body material.

Weight sensors are installed parallel to each spring or pneumohydraulic cylinder. Their output signals are summed up to the transformer 5. When the dump truck moves, the alternating voltage of the tachogenerator 6, amplified by the amplifier 7, applied to the multi-stable memory transformer 8, completely demagnetizes the erase winding. After setting 5, the car switches over the Schmitt trigger 9 (due to a decrease in voltage at the output of the tachogenerator) and issues a trigger pulse to the standby multivibrator 10. The last one starts and turns on the key 11. At this, the storage capacitor 12, the unbalanced voltage of the unbalance sensor / -4 ( errors due to the factors listed above), is discharged through the recording winding of the transformer 8. When this is done, the magnetization of the transformer 8 is magnetized (eclipsed). From the transformer 5, the voltage across the output of the transformer 8 is practically reduced to a bullet value. From this level, the output voltage of the device rises, which is proportional to the net weight of the material loaded into the body of the dump truck. Subject of the invention A device for weighing the rock mass in a dump truck body, containing weight sensors and a tachogenerator, characterized in that, in order to improve the weighing accuracy, a multistable memory transformer is installed in it, to the erase winding of which a tachogenerator is connected to the erase winding, a series connected to the amplifier the trigger, the waiting multivibrator and the key, the output of which is connected to the recording winding of the multi-stable locking transformer, and the transformer from the drive A capacitor connected to the input winding of a multi-stable memory transformer, the storage capacitor connected to one of the key inputs and the input windings of the transformer connected to the weight sensors.