RU2010753C1 - Weight doser - Google Patents

Abstract

FIELD: chemical industry. SUBSTANCE: weight doser has housing, hopper with drop bottom and coarse-adjustment material dispenser and fine-adjustment material dispenser, both disposed below bottom. Each dispenser is formed as dosing rotor. Rotors are mounted on common shaft and form sluice device. Fine- adjustment dispenser rotor is rigidly secured on shaft and coarse- adjustment dispenser rotor is connected with shaft through electromagnetic coupling, which is connected with weight sensors. EFFECT: simplified construction and enhanced reliability in operation. 3 dwg

Description

 The invention relates to the chemical, food and other industries where automation of multiple and accurate weight dosing of bulk materials is required.

 Known weight dispensers containing a feeder-distributor with stepped vibratory trays and feed trays for coarse and fine feed, weights and dose sensors [1].

 The device has a complex design. Also known is a weighing batcher, consisting of a hopper-folding bottom, loading containers with estrus, an adjustable volumetric metering nozzle mounted at the end of estrus, and a fine feeder with a screw and an exhaust nozzle located inside the hopper [2].

 This device also has a complex design, as the control pipe is equipped with a drive and a vertical movement mechanism, consisting of two pairs of levers, the ends of which are connected to the pipe, hopper and the drive shaft.

 A known design of an automatic weighing batcher [3], selected as a prototype and containing a device for preliminary and final weighing. Each device consists of a bowl (hopper) with a folding bottom of the conveyor feeding the material, coarse material feeders and a fine metering feeder and a material weight control sensor. Coarse and accurate weighing is controlled using sensors, the signal from which serves as a control command to open the hopper flaps.

 The advantage of this design is the ability to accurately and efficiently dispense.

 The disadvantage of the design is its excessive complexity, and therefore low reliability and substantial dimensions.

 The aim of the invention is to increase the reliability of the device and simplify its design.

 The goal is achieved in that in a weight doser containing a hopper with a hinged bottom mounted on a rack and spring-loaded relative to the housing, coarse and dosing point feeders and mass sensors, these feeders are each made in the form of a metering rotor mounted on one shaft, moreover, an exact metering rotor rigidly fixed to the shaft, and the coarse dosage rotor is connected to the shaft through an electromagnetic clutch connected to the coarse and accurate mass sensor.

 In FIG. 1 shows a general view of a weight dispenser; in FIG. 2 and 3 are transverse sections of the gateway feeder.

 The weighing batcher consists of a hopper (bowl) 1, mounted on racks 2, which through springs 3 are mounted on the batcher body. The bottom of the hopper 1 is made in the form of two flaps 4, the disclosure of which is carried out from the electromagnet 5 by the signals of the sensor 6, which has contacts that detect the presence of a coarse and accurate mass of material in the hopper 1. Above the hopper there are coarse material and fine batch feeders made in the form of rotors - a rotor 7 of a rough feed of material and a rotor 8 of an exact feed of material, which is connected through a solenoid 9 to the shaft 10. The rotor 7 of the rough feed of material 8 is rigidly connected to the shaft 10. Above the rotors 7 and 8 there is a hopper 11 with a loose material ialom. The closure of the wings 4 of the bowl 1 is carried out using a spring 12.

 The dispenser works as follows.

 Bulk material located in the hopper 11 is fed through the feeders to the hopper 1. In this case, the hopper 1 is lowered on the springs 3. With a rough supply of material, the electromagnetic clutch 9 is turned on and the rotors 7 and 8 are rotated through the shaft 10, providing accelerated filling of the dispenser hopper 1. When the mass of the material reaches a value slightly less than normal, the contact of the coarse mass of the sensor 6 is activated, giving the command to disconnect the electromagnetic clutch 9.

 In this case, the rotation of the rotor 7 is stopped, but the rotation of the rotor 8, which ensures the exact dosage of the material in the hopper 1, continues. When the desired mass of material is reached, the contact of the exact mass of the sensor 6 is activated, disabling the rotation of the shaft 10 and turning on the electromagnet 5, folding the shutters 4 of the hopper 1. When empty, the hopper 1 rises on the springs 3, to which the sensor 6 reacts, giving the command to the electromagnet 5 to close the flaps 4, to turn on the electromagnetic clutch 9 and to rotate the shaft 10.

 The use of dispensers with two rotors as feeders will greatly simplify the design of the dispenser and increase its reliability. In addition, the metal consumption of the structure is significantly reduced and the need for production space is reduced. (56) 1. USSR author's certificate N 412489, cl. B 65 B 1/32, 1972.

 2. USSR author's certificate N 1641708, cl. B 65 B 1/32, 1989.

 3. Lunin O. G. and other Technological equipment of the enterprises of the confectionery industry. M.: Forestry and food industry, 1984, p. 377.

Claims (1)

 WEIGHT DOSER comprising a housing, a hopper with a folding bottom mounted on racks and spring-loaded relative to the housing of the dispenser, a coarse material feeder and a fine metering feeder and mass sensors located above the hopper, characterized in that, in order to increase the reliability of the dispenser and simplify its design, each feeder is made in the form of a metering rotor, the rotors are mounted on a common shaft and form a gateway device, while the rotor of the fine metering feeder is fixed to the shaft, and the feeder rotor is roughly The first material feed is connected to the shaft by means of an electromagnetic clutch connected to mass sensors.

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