SU1392379A1 - Batcher - Google Patents

Abstract

The invention relates to dispensing devices for two components. The purpose of the invention is to expand the range of proportion of the materials to be dosed and ensure reliability. When the device is turned on, the relay 23 is triggered and the contacts 29 will turn on the filling valve 19. The tank is filled to a certain level. In this case, the contacts 22 are first closed, then the contacts of the limit switch 21 are switched. The valve 20 is activated by performing the unloading operation. The level in the tank will drop. The contacts of the switch 21 will switch, the valve 20 will close, and the valve 19 will open, the electromagnet will operate and feed material into the container from the hopper. The valve 19 will be open until the level in the tank reaches a value at which the weight of the material in the container is balanced by the buoyancy force of the liquid that acts on the float. Adjusting the ratio of doses by weight is carried out by moving the support along the levers. f-ly, 3 ill. f208 50Ghh -f ate with

Description

- -13-5 -

J

11392379

refers to the device

You need to dose two components and can be used in the chemical, food industry, as well as in agriculture for preparing mixtures and solutions.

The aim of the invention is to expand the range of the ratio of dosing materials and increase reliability.

FIG. 1 schematically shows a dispenser; in fig. 2 and 3 - electrical control circuits.

The dispenser comprises a hopper 1 with a discharge unit connected with an electromagnet 2. A container 3 is installed under the bunker, equipped with a discharge unit 4 connected with an electromagnet 5, and

tray 6, in which the material from container 3 enters the receiver 7. Container 3 is installed in the guides 8 on the upper lever 9 of the control unit, made in the form of two 20

In the original position of the container 3 and the tank 17 is empty. The container 3 and the float 18 are in the lowest position. In this case, the normally open contact of the switch 21 is zagged, and the normally closed contact of the switch 21 is opened. With

parallel levers 9 and 10, fastened - 25 when the metering device is put into operation, the relay 23 is triggered and with the contacts 29 it turns on the filling valve 19. The tank is filled to HI level. At the same time, contacts 22 are first closed (the switching force of the limit switch 22 must significantly exceed the effort of the closing switch 21), then the contacts of the limit switch 21 are switched, However, the electromagnet 2 does not work, because the contacts 29 are closed than the closed contacts 31. And the valve 20 and the electromagnet 5 (via the contacts 32 - the relay 24 will not release within the time of discharge of the capacitor 27) work, having performed the unloading operation. The level in the tank decreases by 1-2 mm. The contacts of the switch 21 are switched, the valve 20 is closed, the valve 19 is opened, the electromagnet 2 is triggered (via the contacts 22 and 31 - the relay 26 does not release during the delay time of release) and delivers a dose of material from the bunker 1 to the container 3. The power supply of the electromagnet 2 opens, and the valve 19 will open until the level in the tank reaches H2, at which the weight of the material in the container 3 is balanced by the pushing force of the liquid that acts on the float 18. After that, the contacts of the switch 21 switch and the cycle repeats.

through the support 11, installed with the possibility of longitudinal movement in the carriage 12, placed on the lower lever 10, the end of which is pivotally connected to the protruding end of the lever 9. At the same time, the lever 9 is hinged 13, and the lever 10 is hinged 14 mounted on the lid 16 of the tank 17, in which is placed the float 18 associated with the lever 10. The tank 17 is equipped with valves of the set 19 and the drain 20.

The control unit is installed with the possibility of interaction with the end switches (not shown).

The control circuit of the dispenser includes the end switches on Switches 21 and 22, the normally open contact of the switch 21 is connected in series with the first 23 and second 24 relays, and its normally closed contact is with the third 25 and fourth 26 relays. At the same time, a capacitor 27 is connected parallel to the second relay 24, and a capacitor 28 is connected parallel to the fourth relay 26, the valves 19 and the drain 20 are connected to the network via normally open contacts 29 and 30 respectively of the first and second relays, the electromagnet 2 of the bunker unloading unit is connected to the network normally open contacts 29 and 31, respectively, of the first 23 and fourth 26 relays and normally closed contact of the limit switch 22, and the electric

magnet 5 unloading container 3 through the normally open contacts 32 and 30, respectively, the second 24 and third 25 relays.

In order to increase the reliability, a relay 33 is inserted in the circuit, which ensures the reduction of the load on the contacts of the end switch 21 and the thyristors 34.35,

36 and 37. The thyristor control circuit 34 and 35 includes the contacts 29 and 31 of the relay and the limit switch 22, and the thyristor control circuit 36,

37 pins 30 and 32 relays. The dispenser works as follows oaz. one

In the original position of the container 3 and the tank 17 is empty. The container 3 and the float 18 are in the lowest position. In this case, the normally open contact of the switch 21 is zagged, and the normally closed contact of the switch 21 is opened. With

the inclusion of the dispenser in the work srabaty

relay 23 and contacts 29 turns on the filling valve 19. The tank is filled to HI level. At the same time, contacts 22 are first closed (the switching force of the limit switch 22 must significantly exceed the effort of the closing switch 21), then the contacts of the limit switch 21 are switched, However, the electromagnet 2 does not work, because the contacts 29 are open before the contacts 31 are closed. the valve 20 and the electromagnet 5 (via the contacts 32 — the relay 24 will not release within the time of discharge of the capacitor 27) are triggered by performing the discharge operation. The level in the tank decreases by 1-2 mm. The contacts of the switch 21 are switched, the valve 20 is closed, the valve 19 opens, the electromagnet 2 triggers (contacts 22 and 31 do not release the relay 26 during the release delay time) and delivers a dose of material from the hopper 1 to container 3. The power supply of the electromagnet 2 is opened, and the valve 19 will be open until the level in the tank reaches the value of H2, at which the weight of the material in the container 3 is balanced by the pushing force of the liquid that acts on the float 18. After that, the contacts of the switch 21 are switched and the cycle repeats.

Adjusting the dose ratio by weight is carried out by moving the support along the levers. As is known, in a balanced system the sum of moments is zero. In the case under consideration, equilibrium takes place if Gl, -Fl2, m, gl, (H, j-H Jl

(I)

,;,

HO

raj (Se-Sn) (H, -H,.) f, (,} f (2) whence

.

DC-D P Substituting in (l) the value of m from (2),

Sn

get m, l-i-m - 1

and finally

mt Snla m,,

(3)

where G, m - weight, mass of material in

container;

, jl - leverage arm lengths; p is the density of the liquid; H, H2, fluid levels;

g is the acceleration of the force of gravity; BS area of the vessel; BP area of the float; fluid mass; F - buoyancy.

Claims (2)

1. A dispenser containing a hopper for bulk material, under which the mouth is g ) ten 15 levers fastened through a support installed with the possibility of its longitudinal movement on one of the levers, the end of which is hingedly connected with the opposite end of the other lever, the container being installed on the upper lever and the float connected to the lower lever, the limit switches are interoperable with control unit, the normally open contact of one limit switch is connected in series with the first and second relays, and its normal closed contact is connected with the third and fourth relays, parallel to the second Mu and fourth relays are connected by a capacitor, recruitment and drain valves are connected to the network through normally open contacts of the first and second relays, the hopper unloading unit solenoid is connected to the network through normally open contacts of the first and fourth relays and 25 normally closed contacts of the other limit switch, and the solenoid of the container unloading unit through normally open contacts of the second and third relays. 20 2. The dosing unit according to claim 1, of which is with the fact that, in order to increase reliability, four thyristors and the fifth relay are inserted into it, a container connected to the float is activated; the 35 of which is connected by a contact located in a fluid reservoir equipped with set and drain valves, a control circuit to which electromagnets of the hopper and container unloading units, set and drain valves and limit switches are connected, the switching force of one of which is smaller than the other, characterized in that, in order to expand the range of proportion of dosing materials, four relays and an adjustment unit are introduced into it, made in the form of two parallel 0 five You have one limit switch, the electromagnet of the bunker unloading unit is connected to the network through two thyristors, the control circuit of which includes normally open contacts of the first and fourth relays and. a normally closed contact of another limit switch, and an electromagnet of the container unloading unit is connected to the network via third and fourth thyristors, the control circuit of which includes the normally open contacts of the second and third relays.