SU1673222A1 - Device for sorting piece articles - Google Patents

Abstract

The invention relates to the field of weighing equipment, in particular to devices for sorting goods by weight, and allows for improved sorting accuracy and broaden technological capabilities. The device contains a load-receiving platform made in the form of a movable section of the pneumatic conveyor and located above the supply and measuring openings of the carrier platform, and the unit for measuring the weight and controlling the mechanisms for feeding and rejecting goods includes a pressure sensor, a differentiator, a selection circuit for the envelope, a comparator, a comparison unit and a setting unit The sensor element is connected with the measuring hole, the sensor output is connected to the input of the differentiator and one measuring input of the comparison unit, the other one The input of which is connected to the output of the task block, the output of the differentiator is connected to the control input of the comparator unit through a series-connected selection circuit of the envelope and a comparator, in addition, the output of the comparison unit is connected to the control input of the reject actuator, and the control input of the actuator cargo is associated with the output of the comparator, and the working body of the rejection actuator is located above the load receiving platform and has a U-shaped profile. 1 il.

Description

The invention relates to weighing technology, in particular to devices for sorting loads by weight

The purpose of the invention is to improve the accuracy of measurement and expand technological capabilities.

1 is a diagram of the device for sorting piece goods.

The device contains a pneumatic conveyor equipped with a movable section 1 located above the supporting platform 2, in which the feeding hole 3 and measuring hole 4, pressure sensor 5, differentiator 6, envelope extraction circuit 7, comparator 8, block 9 comparison, task block 10, executive rejection mechanism 11, cargo supply actuator 12 and its working body 13. The diagram also indicates pneumoconveyor 14 for underweight products and pneumoconveyor 15 for products with overweight. The load is indicated by the position 16. The movement of products occurs in the direction perpendicular to the plane of the drawing.

In the static state, the area 1 of the pneumatic conveyor lies on the air gap above the carrier platform 2. The signal from the sensor 5 is fed to the differentiator 6 and the block 9 of the comparison. Since the signal from the sensor is constant, the output is differential (V |

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There is no signal and the comparison block 9 is open. There is no comparison signal at the output of block 9.

The device works as follows.

The load enters the area of the pneumatic conveyor 1 and, due to the dynamic effect, brings it out of equilibrium. The oscillations of the pneumatic conveyor 1 are sensed by an air gap created between the pneumatic conveyor and platform 2, the pressure in which is measured by sensor 5. The signal from sensor 5 is fed to the input of differentiator 6, which differentiates the signal. Dallr circuit 7 selects a decay damping signal. In case the signal from circuit 7 is greater than the trigger threshold of the comparator 8. the latter closes the comparison block 9 and the comparison is not made. As soon as the signal from circuit 7 becomes less than the threshold of operation of the comparator 8, the latter opens the comparison unit 9 and sends a signal to the load actuator 12. Unit 9 compares the signals from sensor 5 and unit 10 to set the nominal weight. In case of overweight or underweight, block 9 generates a pulse to the control input of the rejection actuator 11 - positive if overweight, and negative if underweight. The actuator 11 for this impulse transfers the load to the appropriate pneumatic conveyor 14 (if underweight) or 15 (if overweight).

If the weight of the load is normal, then block 9 does not generate a pulse and load 16 passes further along this pneumatic lift belt.

The signal from the comparator 8 actuator 12 supply of goods delivers the following cargo for rejection. In the time interval between the rejection and the filing of the next load, the block 9 does not make a comparison, since the section 1 of the pneumatic conveyor makes damped

Claims (1)

the oscillation and comparison unit 9 is closed. The threshold of operation of the comparator 8 is selected depending on the required accuracy and speed of measurements of the weight of the load. Invention Formula A device for sorting piece goods, containing a pneumatic conveyor equipped with a moving part, a sensor of the parameter of the product under test, an output connected to the first input of the unit generating a control signal, a task block, an output connected to a second input of a control signal generating unit, an output connected to the input of the sorting actuator, and an actuating mechanism for supplying products, characterized in that, in order to improve the accuracy of measurement and expansion of technological capabilities, a differentiator, a decoupling envelope selection circuit and a comparator are introduced into it, the movable section pneumoconveyor is located above the carrier platform, in which the power and measuring holes are made, as The sensor of the parameter of the product being monitored uses a pressure sensor pneumatically connected to the measuring opening of the carrier platform and electrically additionally connected via serially connected differentiator, a decay signal envelope allocation circuit and a comparator with the third input of the control signal generating unit and the input of the actuator of the product feed.