SU413384A1 - - Google Patents

Description

I

The invention relates to the field of weighing technology.

Discrete metering weighers are known, which contain a weight measuring mechanism with a weight sensor, a load receptor with an outlet gate connected to a null organ connected to the weight sensor and the dose setting device.

These dispensers do not provide the required accuracy when dispensing bulk materials.

In order to improve the metering accuracy, the proposed metering unit is equipped with an additional capacity, an accuracy control unit that controls the discharge valve of this container, and a dumping unit connected to the outlet gate of the load receptor.

The drawing shows a block diagram of the described dispenser.

The dispenser contains a load receptor 1 with an inlet shutter 2 and an exhaust shutter 3, a weighing mechanism 4 with a weight sensor 5, a null organ 6 controlling the actuators 7 and 8, an additional tank 9 not connected to the weighing mechanism 4, the control unit 10 precision and block 11 control dumping.

The accuracy control unit controls the actuator 12 of the outlet gate 13 of the additional tank. The dumping control unit controls the actuator 14 associated with the outlet valve 3. The accuracy control unit is designed as a comparison circuit that issues a signal to the actuator 12 to open the outlet valve 13 depending on the amount of mass actually dispensed.

The dumping control unit is designed as a coincidence circuit that generates a signal when dumping a pre-defined amount of material into an additional capacity, which is set to be equal to or slightly larger than the material packaged in the load receptor 1. A weight sensor and a dose setting device 15 are connected to the zero-organ 6.

The dispenser works as follows.

At the command of the zero-organ, the inlet gate 2 opens, and the material enters the load receptor.

When the signals from the weight sensor and the dose setter are equal, the zero-body commands the actuator 7 to close the inlet gate 2. Thereafter, the dump control unit sends a signal to the actuator 14 to open the discharge gate 3 to deliver a specified amount of material to the additional tank. Then, the discharge valve 3 by the dump control module is switched to unload the material from the load receptor to the tank 16. The block

The accuracy control determines the actual amount of material delivered to container 16.

If only the material weighed out when filling the cargo-accepting device was unloaded from the cargo handling device, the accuracy control unit commands the actuator 12 to open the discharge gate 13 to unload the previously filled part of the material from the additional tank to the container 16.

In the case when, in addition to the weighed material, also the previously packaged material or part of it was delivered from the load receptor during unloading, the accuracy control unit signals an overweight. The additional tank is connected to the weight sensor and the material is poured from it into the tank 16 to set a predetermined dose.

Thus, the increase in accuracy in dosing with the described dosing device is achieved due to the exclusion of overweight when unloading the packaged material from the load receptor.

Subject invention

A discrete weight dosing device for bulk materials, containing a weighing mechanism with a weight sensor, a load receptor with an outlet bolt connected to a null organ connected to the weight sensor and a dose setting device, is distinguished, and with the aim of improving accuracy, it is equipped with an additional capacity, an accuracy control unit, a control unit, and an outlet gate for this tank and an outlet block connected to the outlet gate of the load receptor.