SU1643936A1 - Device for determination of volumes of doses of pulse automatic batch measuring machine - Google Patents

Description

one

(21) 4636094/10

(22) 03.05.39

(46) 04.23.91. Bul Number 15

(72) Yu.P.Koldunenko, A.A.Nelyubin

and M.V.Sokolov

(53) 66.023 (033.3)

(56) USSR Author's Certificate No. 781596, cl. G 01 G 17/06, 1973.

Sokolov M.Z. and others. Automatic dosing of liquid media. -L .: Himi, s. 353.

(54) DEVICE FOR DETERMINING THE VOLUME OF DOSES OF PULSE AUTOMATIC DOSERS

(57) The invention relates to the technique of volumetric dosing of liquids and improves the accuracy of the determination

nor the magnitude of the dose given by the executive device of the pulse dispenser. The control trigger 5, to the input of which impulses from the generator 3 arrive, opens the valves 11.13 and 12.14 in pairs. Using the switch 2, the fluid flow directs to the measuring tank 32 or to the tank 33 to the circulation of the flow. The pulses from the generator 3 are also fed to the dose counter 17 through element 16. The switch 19 sets the number of doses that need to be sent to the measuring capacitance 32. Nodes 21 and 22 of unit 1 control the switch 2 by commanding electromagnets 29 and 30. Il.

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The invention relates to a technique for volumetric dosing of liquids.

The purpose of the invention is to improve accuracy.

The drawing is a schematic diagram of a device for determining the volume of doses of pulsed automatic dispensers.

The device comprises a control unit 1, a fluid flow switch 2, a 3 pulse generator, an actuating device 4 (test dispenser), a control trigger 5.

The actuator 4 consists of three discs 6–3, between which membranes 9 and 10 are clamped, and the locking valves 11–14. The disc 7 has a measuring capacity, the cavities of discs 6 and 3 are connected to the pressure pipe 15 through valves 1 1 and 14 and through valves 12 and 13 with switch 2.

The control unit 1 consists of an element AND 16, a dose counter 17, a decoder 13, i switch 19, trigger 20 and two output nodes 21 and 22.

Nodes 21 and 22 are identical and each of them consists of an element AND-NO 23, the first 24 and second 25 elements, a capacitor 26, a pulse transformer 27, a triac 28.

Switch 2 has a drive in the form of electromagnets 29 and RFP.

In unit I of the control there is a starting button 31. The device also contains a measuring capacitance 32 and a capacity 33.

The device works as follows.

Short pulses of a given frequency, coming from the generator of 3 pulses to the counting input of trigger 5, cause it to transfer from one steady state to another with the arrival of the next pulse. These pulses attack the corresponding group of shut-off valves 11-13. Dosing fluid, which is under pressure in the pressure channel 15, for example, with valves 12 and 14 closed and valves I and 13 open, through valve 11 fills the working cavity in disk 6 and presses membrane 9 to spherical surface measuring container in disk 7 This leads to the extrusion of separation fluid into the right spherical segment and the displacement of the membrane 10 in

extreme right position and the extrusion of a single dose through an open klpan 13 to switch 2 flow. When the next pulse arrives from generator 3, trigger 5 is switched and valves 11 and 13 are closed, and valves 12 and 14 are opened and similarly a single dose of fluid is squeezed out of the working cavity of disk 6. Thus, each pulse from generator 3 causes a single dose to be output to the switch 2 threads.

5 When button 31 is pressed, all binary outputs of counter 17 are set to O, and decimal outputs of decoder 1, which, through switch 19, arrive at 0, the second input of element I 16. At the same time, the first pulse from generator 3, after passing through element 16, turns on direct output of the trigger 20 and enters the counting input of the counter 17. 5 In this case, at the output of the element

AND-NO 23 appears O, which is converted by element 24 to 1, and element 25 to O and enters the input of element 23, the output of which 0 appears 1. In this case, capacitor 26 provides a delay of signals at the output of element 24 that provides at the output of the element 25 the generation of pulses whose frequency r is determined by the capacitance of the capacitor

26. The frequency of these pulses by several orders of magnitude exceeds the maximum frequency of operation of generator 3. Pulses from element 25 are sent to pulse 40 transformer 27 and turn on thyristor 28, which causes electromagnet 29 to turn on and transfer the flow switch from Circulation to position Measurement 45 Subsequent pulses from the generator 3, having passed through the element 16 to the counting input of the counter 17, cause the appearance of O at the outputs of the decoder 18. When an O rQ appears at the output of the decoder 13, it enters the input of the element 16, closing the pulses from the generator 3 to the counter 17 and the inverse second input of the trigger 20, switching it, i.e. O appears at the direct output, and inverse 1 appears at the output. This causes the pulse generation to stop at the output of the node 21, the triac 23 closes and the electromagnet 29

turns off, the output of element 25 of node 22 begins to generate pulses, including a thyristor 28 and an electromagnet 30, which switches the flow switch from the Measurement position to the Circulation position. The required number of doses entering the metering capacity is determined by the position of the switch 19.

Claims (1)

Apparatus of the Invention A device for determining the volume of doses of pulsed automatic dispensers, comprising measuring capacity, pressure and discharge pipes connected to the respective valves of the dispenser connected to the outputs of the control trigger, the input of which is connected to the pulse generator, and the control unit with a dose counter differing from that, in order to increase accuracy, it is equipped with a flow switch with two electromagnets, installed between the drain pipe and the supply and measuring tanks, and in the control unit laziness introduced decoder, the switch trigger, the AND and two vyhod0 five 0 five node, each of which is molded as an element of NAND, two elements NOT, a capacitor, a pulse transformer and a triac, the outputs of the dose counter are connected to the inputs of the decoder, the outputs of which through the switch are connected to the inverse input of the trigger and the first input of the element I, the second the input of which is connected to the pulse generator, and the output to the input of the dose counter and the forward trigger input, the direct output of which is connected to the first input of the AND-N element of the first output node, and the inverse output to the first input of the AND-N element in The first node of the output node, at each output node, is NOT bridged by the capacitor, its input is connected to the output of the NAND element, and the output is connected to the second input of the NAND element and the input of the pulse transformer, the output of which is connected to the control and power inputs of the triac, and the outputs of the triacs of the first and second output nodes are connected respectively to the first to the second electromagnets of the Flow switch.