RU164350U1 - MEASURER FOR WEIGHT DOSING OF FLOUR - Google Patents

Abstract

1. A dispenser for weight dosing of flour, containing a flour feeder, a rack, a control unit connected to at least two load cells structurally made in the form of supports for a weight hopper having a window for dispensing doses of flour in the lower part, characterized in that the control unit made in the form of a controller that includes a processor and an analog-to-digital Converter connected to these load cells, which are placed on the rack symmetrically about the axis of the hopper, and the processor is configured OF DATA from the load cells with primed in its memory the control data corresponding to the set dose weighing, the window for dispensing doses of flour equipped pipe for discharging the flour, which is provided with a flap associated with the discharge mechanism muki.2. The dispenser according to claim 1, characterized in that it is equipped with three supporting load cells for the hopper, located on a rack symmetrically with respect to the axis of the hopper. 3. The dispenser according to claim 1, characterized in that the flap for unloading the flour is equipped with a manual or pneumatic actuator. 4. The dispenser according to claim 1, characterized in that the mechanism for unloading the flour is made in the form of an electric screw.

Description

The proposed utility model relates to food equipment, specifically to devices for the weight dosing of flour for the manufacture of bakery and confectionery products.

A known production line for the production of flour confectionery products according to the patent of the Russian Federation on PM 94114, including a flour dispenser for making dough. This patent does not disclose a flour dispenser device.

Known automatic liquid dispenser according to patent No. 2526232, comprising a housing with a lid, placed in a tank with a coolant, a drive equipped with an electronic control unit, including a programmable controller. This device is not suitable for dosing flour. Also known is a weighted batch dispenser according to the patent of the Russian Federation No. 2018789, containing a frame, a load hopper, which is supported by supporting parts on load cells connected to a calibration system, which includes model sensors, a loading screw mechanism, heat sensors with heaters. The disadvantage of this dispenser is its complexity and bulkiness, the high cost of dosing.

Closest to the proposed utility model is, in our opinion, the weight dispenser according to the patent of the Russian Federation for PM No. 38324 - prototype. The specified dispenser contains a screw feeder with an electric drive equipped with a frequency converter, a weight hopper, in the lower part of which there is a window for pouring bulk material into the bag. The hopper is supported by strain gauges (hereinafter referred to as strain gauges) connected to a control unit that is connected to a frequency converter.

The disadvantages of the prototype include a significant dosing error associated with the abundant formation of flour dust when a dose of flour is spilled directly into the hopper window. This leads to a discrepancy between the weight of the weighted dose and the mass of flour received in the dough mixer. In addition, the prototype does not take into account the possible uneven loading of the hopper with bulk material, which also leads to errors in weighing. This problem is partially solved in the invention No. 2018787 with the help of a sophisticated built-in system for calibrating load cells, which almost doubles the cost of the dispenser. Such a solution significantly increases production costs, which is unacceptable in the baking industry, since bread is a socially significant product.

The technical task is to increase the accuracy of weight dosing while reducing the cost of production of flour products.

The technical result is achieved in that a dispenser for weighing flour dosing, comprising a flour feeder, a rack, a control unit connected to at least two load cells structurally made in the form of supports for a weight hopper having a window for dispensing flour doses in the lower part, that the control unit is made in the form of a controller including a processor and an analog-to-digital converter connected to the indicated load cells, which are placed on the rack symmetrically with respect to the axis of the hopper, and sor is configured to compare data from the load cells with primed in its memory the control data corresponding to the set dose weighing, the window for dispensing doses of flour equipped pipe for discharging the flour, which is equipped with a shutter mechanism associated with the discharge of flour.

The dispenser is characterized in that it is equipped with three load cells located on the rack symmetrically with respect to the axis of the hopper. In the dispenser, the flap for unloading flour can be equipped with a manual or pneumatic drive. In the dispenser, the mechanism for unloading flour can be made in the form of an electric screw.

The utility model is illustrated by drawings. In FIG. 1 schematically shows the proposed dispenser for the weight dosing of flour (hereinafter referred to as the dispenser). In FIG. 2 shows a photo of a dispenser control unit made in the form of a universal controller.

As standard, the dispenser contains a flour feeder with a transport pipe 1 equipped with a shutter (not shown). The pipe 1 is in communication with the weight hopper 2. At the bottom of the hopper 2 has a window equipped with a shutter 3. Window 3 is communicated with a pipe 4 for unloading a dose of flour. The pipe 4 is equipped with a shutter 5, which is connected with the drive 6 of the screw mechanism for slow unloading of flour. At the request of the customer, the shutter 5 can be equipped with a manual quick unloading mechanism in the form of a lever, or with a pneumatic actuator. The hopper 2 is mounted on the power frame 7. The frame is equipped with protrusions 8 for installation on load cells 9, 10, which are placed on the brackets 11. The brackets are mounted on the rack 12 of the dispenser.

The dispenser contains a control unit made in the form of a universal weight controller 13. The controller includes a control panel 14, a display 15, independent inputs 16 (hereinafter referred to as input 16) of an analog-to-digital converter (hereinafter referred to as the ADC) connected to a central processor (not shown). The load cells are connected to the input 16 using signal lines 17, 18. A metering device with three load cells placed symmetrically on the stand 12 is possible. In this case, the frame 7 has three protrusions for supporting the load cells. At the request of the customer, the dispenser is equipped with a vibrator 19 to accelerate the unloading of a weighed dose of flour.

The dispenser is used in the following order. Since the accuracy of dosing depends on the type and grade of flour, the first two to three weighings are trial. During trial weighings, the difference in the readings of the load cells due to the uneven filling of the hopper is taken into account, a correction is made for the coast of the transport system and the mass of the falling column of flour. The indications on the controller's panel during trial weighings are checked by weighing doses of flour from the hopper on a model scale. The results of trial weighings are generalized in the form of an empirical formula, which is converted into a program and entered into the controller memory.

For dosed weighing, first, using the keyboard on the remote control 14, the weight of a dose of flour of this type is introduced into the processor mash. Then, on the remote control, press the “Download” key. In this case, the feeder is turned on, which transports the flour through the pipe 1 to the hopper 2. The weight of the hopper with flour increases, the brackets 11 are bent, the strain gauges 9, 10 are stretched, signals appear at lines 16, 18, which are fed to input 16. These signals are converted by the ADC into digital data and transfers to the processor. The processor constantly calculates the weight of flour in the hopper, substituting the current data in an empirical formula and taking into account the corrections obtained during trial weighings. When the estimated weight of flour in the hopper becomes equal to the weight stored in the processor’s memory, the controller turns off the feeder and closes the flap in pipe 1. After pressing the “Unload” key, the controller opens the flap 3. A weighted dose of flour is poured into the closed pipe 4. After that, the controller opens the flap 5 and includes an auger drive 6 in the pipe 4. When the auger rotates, the flour is unloaded from the hopper without loss of flour dust to a receiving container (not shown). A certain time is allotted for unloading. If the unloading is not fast enough, the controller turns on the vibrator 19. When the walls of the hopper vibrate, the flour unloads much faster.

When transferring production to another type of flour (which does not happen often), test dosage weighings of a new type of flour are first repeated. After that, new correction factors corresponding to the new type of flour are introduced into the dispenser memory. A new type of flour is dosed in the same manner as described above.

According to the described scheme, prototype dispensers were manufactured at the applicant’s enterprise. Tests showed a good result. The weighing accuracy of the dispenser as standard does not exceed 0.2%. The dispenser error in an arbitrary configuration does not exceed 0.5%, which is quite satisfactory.

The applicant’s enterprise has developed working documentation for dispensers with a hopper for weight doses from 10 to 100 kg (DMT dispenser - 100 / MRSH) and with a hopper for flour doses from 20 to 200 kg (DMT dispenser - 200 / MRSH).

The proposed dispenser, equipped with an original controller, has a number of advantages compared to analogues. It provides accurate weight dosing of all types of flour, having a simpler device, which means a lower cost of dosing flour for bread, which is of great social importance. The required accuracy is achieved by trial weighing using a programmable controller. The price of the controller in the proposed dispenser is lower than the price of the thermal electromechanical calibration system built into the analog dispenser, and the time for test weighing does not exceed the time required to calibrate the load cells in the analog dispenser.

The new, industrially applicable device described above is proposed for protection by a utility model patent.

Claims (4)

1. A dispenser for weight dosing of flour, containing a flour feeder, a rack, a control unit connected to at least two load cells structurally made in the form of supports for a weight hopper having a window for dispensing doses of flour in the lower part, characterized in that the control unit made in the form of a controller that includes a processor and an analog-to-digital Converter connected to these load cells, which are placed on the rack symmetrically about the axis of the hopper, and the processor is configured OF DATA from the load cells with primed in its memory the control data corresponding to the set dose weighing, the window for dispensing doses of flour equipped pipe for discharging the flour, which is provided with a flap associated with the discharge mechanism of flour. 2. The dispenser according to claim 1, characterized in that it is equipped with three supporting load cells for the hopper, located on a rack symmetrically with respect to the axis of the hopper. 3. The dispenser according to claim 1, characterized in that the flap for unloading the flour is equipped with a manual or pneumatic drive. 4. The dispenser according to claim 1, characterized in that the mechanism for unloading the flour is made in the form of an electric screw.

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