SU684323A1 - Automatic weight batchmater - Google Patents

Description

one

The invention relates to the manufacture of a weight dosing means and can be used for the dosing of liquid and bulk materials.

A device for metering materials is known, which contains a feeder, a weighing device, a compensation measuring circuit, dose setting blocks, two voltage comparison circuits, the inputs of which are connected to the output of the compensation measuring circuit and the exact and coarse dose setting block, and their outputs through the signal drivers are given with a logical switching circuit of high and low feed rates by the feedr ll. The high accuracy of the metering operation is ensured by the use of a compensation measuring cxeNtJ and blocks of accurate and coarse dose setting, which are made in the form of potentiometers.

The disadvantages of this device are the increased complexity of the circuit, the need to use two comparison circuits and two dose setting blocks to provide two stages of weight gain, accurate and coarse, which complicates the operation, since the weight is set twice: first on the block

rough, and then on the unit to set the exact dose.

The closest to the technical essence of the invention is an automatic weight portioning dispenser containing a metering device with a weight mechanism, the axis of the arrow of which is connected to the rotor of a selsyn-sensor connected in an indicator circuit with a selsynsim receiver with a dial indicator; coarse and precise metering feeders with their control unit; control panel and unloading mechanism 12.

five

The known device does not provide sufficiently high accuracy and a wide range of multi-component dosing.

The aim of the invention is to improve the operation accuracy and the expansion of the dosing range.

This goal is achieved by the fact that in the proposed metering device the driver is made in the form of two switching devices connected to the control panel and a resistor setting device, one of the switching devices being connected to the inputs of the resistance setting device along the power supply circuit,

Claims (2)

0 and the second is connected with a zero-organ and along a three-phase circuit with a geojunction sensor. The proposed dispenser is schematically depicted in the drawing. An automatic weight portioning dispenser consists of a metering device 1 with a weight mechanism 2, with axis 3 of the arrow 4, which is connected to the rotor of the resicine sensor 5, which is connected in an indicator circuit to the selsyn receiver 6, which has a dial indicator 7; feeders 8 and 9 of coarse and precise dosing with their control unit 10; remote control 11 and the mechanism 12 unloading. The device is also equipped with a sync pair of synchro pairs connected to the line 13,14 and 15 and to the control unit 10 of the control units 8 and 9 with a high-resistance null-organ 16 and a master device 17, made in the form of a unit for remote operational setting of doses associated with two control unit 11 switching devices 18 and 19 and a resistor setting device 20. The switching device 18 is connected to the input contacts of the resistor setting device 20 via the power supply circuit, and switching device 19 connected to the null-organ 16 is connected to the contacts of the resistor three-phase sensor circuit. Selsyn receiver 6 in this scheme performs control functions. An automatic multi-component metering device operates as follows. The required dose of material is set in the form of a certain resistance of the resistor setting device 20, connecting it to the supply mains provides the appropriate combination of voltages at the output of the remote operational setting unit. The minimum possible value of adjusting the resistance of the stalk adjuster 20 determines the minimum possible price for dividing the scale of the specified weights. Decreasing these values and, consequently, increasing the number of possible connection options for the resistances of the resistor setter 20, which has a well-defined number of resistors, is provided by using two adjustment positions: contacts on the power supply circuit and contacts on three-phase circuits. Resistance adjustment of the setting setpoint 20 is carried out control panel 11 through switching devices 18 and 19. Moving the input power contacts (contacts along the power circuit) switching device 18 provides It cuts the resistance adjustment corresponding to the graduation of the weight scale in large units, for example, in hundreds of kg. The movement of the output contacts (contacts over three-phase circuits) of the resistor ec sensor 20, carried out by the switching device 19, provides for adjustment of the resistance of the corresponding calibration of the weight of the pulses in small units, for example, tens or kg units. Before the start of dosing from the control panel 11, the required weight is set in the remote dose setting unit: first large units are put up, for example, hundreds of kg, then small ones, for example, tens and kg units, and a corresponding combination of voltages appears at its output. The rotor windings of the selenium-setting device 5 entering the null organ 16 are also fed into the null organ 16. The output signal of the null organ 16 is due to the fact that these two combinations of voltages coming into it give a new resultant. This signal enters control unit 10, which includes coarse and precise metering feeders 8 and 9. The weight of the incoming material into the metering device 1 is indicated by the arrow 4 of the weighing mechanism 2, and its axis 3 rotates the rosin of the selsyn-sensor 5. The control selsyn-receiver 6 connected with the indicator circuit with the selsyn-sensor 5 with the dial indicators 7 produces remote transmission of readings weight. The voltage of the rotor windings of the selsyn sensor 5, which change when the weight is set, causes the output signal of the null organ 16 to change. At a certain value, the control unit 10 shuts off the coarse metering feeder 8 and then takes the exact metering step from the feeder 9. At this moment, when establishes the equality of the directed counter-voltage at the output of the unit for remote operational setting of the dose and the voltage of the rotor windings of the selsyn-sensor 5, the output signal of the null body 16 will be equal to zero, and the unit 10 of the control It does not turn off the exact metering feeder 9. At this point, the actual weight of the material in the metering device 1 has a predetermined value and the unloading mechanism 12 is turned on from the control panel 11. Thus, the processing of a given weight ends with the compensation of the voltages at the output of the remote operative dose setting unit, which are determined by the resistance of the resistor setter 20, and the counter-voltages of the rotor windings of the selsyn sensor 5, the Invention Formula Automatic weighing batch dosing unit , a weight mechanism with a dial pointer, the axis of the arrow of which is associated with a rosin of a selsyn-sensor connected in an indicator circuit with a selsyn-receiver, and 8, their rotor circuits are null-organized, feeders, a control panel with a master device and an unloading mechanism, characterized in that, with a method of increasing the accuracy of operation and expansion of metering, the device is made in the form of two switching devices connected to the control panel and a resistor unit, with one of the switching devices connected to the inputs of the resistor setter in the supply circuit, and the second is connected to the nullange and in a three-phase circuit to the resistor setting unit. Sources of information taken into account in the examination 1.Certificate of certificate №402750, cl. G 01 G 19/34, 1973. 2. Author's certificate number 456211, cl. G 01 G 13/28, 1972 (prototype).