RU2003050C1 - Batcher - Google Patents

Abstract

Use: for dispensing gases or liquids. SUMMARY OF THE INVENTION: the device comprises a container, an inlet valve, an outlet valve and two additional valves. All these elements are separated by two sensitive chambers in the sensing elements. In addition, the device includes a control unit with direct and inverse outputs, input and output channels. Direct and inverse outputs of the unit are connected respectively to the first chambers of the input and output valves, and the second chambers of the input and output valves are connected to the first chamber of the tank and, respectively, to the input and the output channel, the first chamber of the first additional valve is connected to the second chamber of the inlet valve and the second chamber of the tank, the first chamber of the second additional valve is connected to the second chamber of the the valve and the second chamber of the tank The second chambers of the first and second additional tanks are connected to the direct and inverse outputs of the control unit, respectively. 3 zlfs, 2 il

Description

The invention relates to metering devices and can be used in the gas, chemical and petrochemical industries for dispensing gases or liquids.

Known dispenser containing a container with a gas m control chambers between which there is a membrane, a control unit with direct and inverse outputs connected respectively to the control inputs of the input and output valves, the input of the input valve is connected to the input channel, the output of the input valve and the outlet valve input is in communication with the gas chamber, the outlet valve outlet is connected to the outlet channel, and the direct output of the control unit is connected to the control chamber (ed. St. No. 972225, class GOi F 11/08, 1981).

The known dispenser has a large discreteness in the flow rate, determined by the volume of the gas chamber.

A device for pulsed dosing of gas is known, comprising a container separated by a sensing element at the bottom of the chamber, inlet and outlet valves, each of which is divided by a corresponding sensing element into two chambers, a control unit with direct and inverse outputs, an inlet and outlet drip, and a direct and inverse outputs of the control unit are connected respectively to the first chambers of the inlet and outlet valves, and the second chambers of the inlet and outlet valves are connected to the first chamber of the tank and, respectively, inlet and outlet channel (ed. ev, No. 1132150, class 6 01 F 11/08, 1984).

The known dispenser makes it possible to reduce the discreteness of the change in flow, however, there is a technical contradiction between the discreteness of the dose and productivity, which makes it insufficiently convenient to use.

An object of the invention is to improve the usability of a metering device.

The goal is achieved by the fact that two additional valves are introduced into it, each of which is divided into two chambers by a corresponding sensor, the first chamber of the first additional valve connected to the second chamber of the inlet valve and the second chamber of the tank, the first chamber of the second additional valve connected to the second chamber of the outlet valve and the second chamber of the tank, and the second chambers of the first and second additional tanks are connected to the direct and

inverted outputs of the control unit, respectively.

In addition, the capacity chambers can be equipped with inserted position sensors of the sensing element connected to the control unit. The output channel may be provided with a flow controller, as well as a fluid storage and discharge unit.

In FIG. 1 shows a diagram where the sensing element is made in the form of a membrane; in FIG. 2 - the same, in the form of a piston.

The device contains a tank 1, an inlet valve 2, an outlet valve 3. inlet

channel 4 connected to valve 2, output channel 5 connected to valve 3. Inlet valve 2, tank 1 and outlet valve 3 are separated by two sensing elements 6 into two chambers; 7, 8; 9, 10; 11, 12, respectively. Chambers 8, 10, 12 are connected between

by myself. Cameras 7, 11 are connected to the unit

control 13. The output channel 5 is provided

node accumulation and return of fluid 14,

which is made, for example, in the form of a bellows-spring actuator or cylinder with a piston and a flow stabilization system 15.

The inlet channel 4 is provided with a pressure adjuster 18, which is connected when dispensing gas directly to the channel 4 or, for example, through a container 17 when dispensing liquid. The metering device is equipped with additional valves 18, 19 with two chambers 20, 21 and 22, 23. Chambers

21 and 23 are connected to the second chamber 9 of the tank 1 and, respectively, to the input channel 4 and the output 5. The chamber 20 is connected to the chamber 11, and the chamber 22 to the chamber 7 of the valve 2. Device for dispensing (Fig. 2)

additionally equipped with position sensors of the sensing element 24, 25 (for example, buttons) installed in the tank with the possibility of interaction with the sensing element 6, made

in the form of a piston, the control unit 13 is equipped with a distributor 26, the control chambers of which are connected to the corresponding position sensor 24 and 25. The control unit can be equipped with a control system that turns on and off the power supply to the button of the position sensors 24 and 25. It can be done manually, for example , using the toggle switch or automatically, for example, using the MKP-1 programmable microcontroller (not shown). Compressed air pressure is supplied to manifold 26 in conduit 27, which, through channel 28, enters chambers 7 and 22 of valves 2 and 19 of chamber 11 and

20 valves 3, 18 through channels 29.30 are associated with the atmosphere.

The device operates as follows.

The dosed liquid, for example, from the tank 17 under a predetermined pressure by means of a pressure adjuster 16 enters the channel 4. If in the initial state the valves 3 and 18 are closed, since the compressed air pressure enters the chambers 11 and 20, then the valves 2 and 19 are open, since in chambers 7 and 22 of valves 2 and 19 there is an atmosphere. The liquid from the channel 4 enters the chamber 8 of the open valve 2 and into the chamber 10 of the tank 1. Since the valve 3 is closed, no liquid enters the outlet channel 5. The sensing element 6 (membrane) moves upward under the pressure of the dosing liquid and fills the volume 10 of the container 1 with liquid. In this case, the air from the chamber 9 of the tank 1 through the open valve 19 leaves in the outlet channel 5. After some time, when the chamber 10 is filled with liquid, the control unit 13 will connect the chambers 11, 20 of the valves 3, 18 to the atmosphere and they will open under the force of the dosed liquids. And the chambers 7, 22 of the valves 2, 18 are connected to the pressure of the compressed air and are closed. The liquid from the channel 4 through the open valve 18 will begin to flow into the chamber 9 of the tank 1 and fill it with liquid. In this case, the sensor element b starts to fall down and expel the liquid from the chamber 10 into the output channel 5. If it is necessary to dispense doses in a pulsed manner, then, for example, a distributor (not shown) is used to turn off the liquid storage and delivery unit 14 and the flow rate stabilization system 15. In this case, the liquid is displaced directly into the dosing container. If a single dose is to be dispensed, the control unit 13 no longer changes its control signals. In this case, the liquid is displaced from the chamber 10, and the chamber 9 is filled with liquid, and the metering device is ready to dispense a new dose. If it is necessary to dispense several doses, the control unit changes the pressure in the valve control chambers 2,3,18,19 as many times as it is necessary to dispense the doses. If it is necessary to change the capacity, then the pressure in the channel 4 is changed using the pressure adjuster. When the pressure changes, the filling time of the chambers 9, 10 of the container 1 and, therefore, the capacity are changed. If it is necessary to carry out continuous dosing of a given dose, then node 14 is connected to the output channel 5. In this case, the liquid fills the chamber of node 14, compressing the spring, and at the moment

switching valves draws fluid from unit 14, smoothing the pulses and performing a smooth dosing. Using the flow stabilization system 15

continuously dispense a liquid of a given flow rate, while the amount of liquid to be dosed is judged by the number of emptied volumes of the container 1.

The greatest effect of the metering device is achieved with gas metering. This is achieved by the fact that the pressure regulator 16 can change the pressure in the channel 4. The number of pressures is determined from the expression m 2 - 1 or, at least

least m 2

p (K-M)

 1. This means that with

using one tank 1 you can get the same number of different discrete doses,

where m is the number of different stabilizing pressures;

n is the number of pressure stabilizers (valves) in the pressure regulator; K is the number of amplifiers. The number of doses will be equal to the number of stabilized pressures, i.e. equal to m

The number of containers 1 connected in a similar way can be increased, if the volume of the tank is 1, Vi 1, then the volume of the second tank will be numerically equal to / 2 m, etc., in this case, the number of different doses is

35

2p (K + 1) 4. 1(

where I is the number of capacities connected in a similar way.

The dispensing device of FIG. 2 works as follows.

In the initial state, the compressed air from the channel 27 enters the channel 28 and the controlled chambers 7, 22 of the valves 2, 19, which are closed. The dosed liquid or gas

from the inlet channel 4 it enters the chamber 21 of the valve 18 (since it is atmospheric pressure in the chamber 20 and it is open) and then into the chamber 9 of the container 1, the sensing element 6 (piston) rises, expelling the air

from the chamber 10 through the open valve 3 to the output channel 5. After the sensor element b reaches its highest position, he presses the button of the sensor 24 and closes the electric circuit

normally open contact of the sensor 24. As a result, a control signal is received in the control chamber of the distributor 26 and it switches. In this case, the channel 27 will be connected to the channel 29 and the valves 3, 18 will be closed, and the channel 28 will be connected to the channel 30 (atmosphere) and the valves 2, 19 will open.

Now, the liquid from the channel 4 through the open valve 2 will enter the chamber 10 of the tank 1, and from the chamber 9 through the open valve 19 - into the output channel 5. The sensing element 6 will begin to fall down. As soon as the sensing element moves away from the sensor 24, its contacts are open and the control signal 26 does not receive a control signal, however, the distributor 26 does not switch (it can only switch when the contacts of the limit switch 25 are closed, the control signal enters another camera of the distributor 26).

In this way, the sensing element b slides down to deliver the first dose. As soon as the sensing element 6 reaches the lower position, it will press the button of the sensor 25, close its normally open contacts and form a control signal, which, entering the other control chamber of the distributor 20, will switch it to its original state. At the same time, compressed air through channels 27, 28 will close valves 2 and 19, and the atmosphere through channels 30, 29 will open valves 3.18. Now the liquid from the channel 4 will again begin to flow into the chamber 9 of the container 1, and from the chamber 10 through the valve 3 and the outlet channel 5. After that, the dosing cycles will be repeated while from any sensor, for example, 2-4, will not shut off the power supply (electric or pneumatic depending on the design of the sensor). If you disconnect the power supply from the sensor 24, for example, manually using the toggle switch or automatically using the MKP-1, then the sensor 6, having reached its highest position, will close the contacts of the sensor 24, but the control signal will not be transmitted to the distributor 26 ( since power is off) and distributor 26 will not switch. Since the distributor 26 will not switch, the valves will not switch and the dosing process will stop.

Thus, by setting the number of pulses and counting them on the sensors 24, 25, it is possible to form a given dose.

The proposed device can change the fluid flow rate per unit time by changing the pressure on channel 4. As the pressure increases, the switching frequency of the distributor increases and the number of doses increases per unit time, while decreasing the pressure in channel 4, the fluid flow rate decreases in a similar way.

Thus, the proposed metering device has a higher productivity due to the fact that both chambers of the container are operational and there is no idle filling of the chamber of the container 1 with a dosed liquid or gas.

Taking into account the factor that the device in one cycle of raising and lowering the sensing element 6 produces a dose equal to

two volumes of capacity 1, this will allow each subsequent volume of capacity 1, connected in a similar way, to perform one unit of the minimum dose more than the maximum dose received by the first

capacity or total dose of previous containers per cycle. Moreover, if the volume of the first container is equal to one, then when dosing the liquid for one cycle of raising and lowering the sensitive element 6, a dose is given equal to two units. Then the volume of the second capacity is taken one more, i.e. Vi 1. Va 1 -2 + 1 3. V3 2Vi + 2V2 + 1 1 -2 4-2 -3 + 1 9 etc. The dose of each volume can be composed of various

cycles 1, 5; 2, 3, etc., where one cycle is equal to two volumes of capacity, 1.5 cycles is equal to three volumes of capacity, etc.

If you dose each tank for 1.5 cycles, then the volumes will be equal to:

Vi 1;

V2 - 2Vi -i- 1 4; , V3 3Vt + 3V2 + 1 3 +12 +1 16;

J4 2Vi + 3V2 + ZUZ + 1 3 + 12 + 48 + 1 64, etc.

Dosing is carried out as follows.

If it is necessary to give a dose equal to one, then the sensitive element 6, for example, is lowered down. If it is needed

If two units are to be delivered, p, then the sensitive element is lowered by the control system and lifted up, etc. Similar manipulations can be carried out with each capacity or several in

various combinations.

The increase in productivity is also achieved by the fact that it is not necessary to coordinate the operation of the generator with the empty time of the tank, where the tank with the position sensors of the sensing element and the switchgear form a generator, where a metering medium is used as the drive energy. The proposed device has a wider

area of use, since it can dispense the dose both discretely and continuously with a given flow rate.

The proposed device has a wider range of dose control, where the number of different discrete doses for gas is determined, for example, from the expression m - 2n (K + 1) - 1 or 22nK1 - 1 it is not difficult to notice that for n K 1 3 it can be obtained the number of doses m 2s4 - 1.

The proposed device can use a single container to dispense various media, for example two different gases. To do this, the valve inputs are connected to

0

different gas media in two channels 4 Using pressure adjusters, it is possible to form different pressures in channels 4 mossily, which will allow for metering of various gas mixtures of the required concentration in one cycle.

All this makes the proposed metering device more reliable and convenient to use.

(56) Copyright certificate of the USSR No. 972225, cl. G 01 F 11/08, 1981.

USSR copyright certificate No. 1182150, class C 01 F 11/08.

Claims (2)

1. DOSING DEVICE, comprising a container divided by a sensor into two chambers, inlet and outlet valves, each of which is divided into two chambers by a corresponding sensor, a control unit with direct and inverse outputs, input and output channels, the direct and the inverted outputs of the control unit are connected respectively to the first chambers of the inlet and outlet valves, and the second chambers of the inlet and outlet valves are connected to the first chamber of the tank and, respectively, to the inlet and outlet channels characterized in that two additional valves are introduced into it, each of which is divided into two chambers by a corresponding sensitive element, wherein F-Z-fI- 77 the first chamber of the first additional valve is connected to the second chamber of the inlet valve and the second chamber of the tank, the first chamber of the second additional valve is connected to the second chamber of the outlet valve and the second chamber of the tank, and the second chambers of the first and second additional chamber. capacitances are connected to the direct and inverse outputs of the control unit, respectively, 2. A device according to q.1, characterized in that the capacity chambers are equipped with position sensors of the sensor connected to the control unit. 3, A device according to claim 1, characterized in that the output channel is provided with a flow regulator. 35 4. The device according to 6.1, characterized in that the outlet channel is provided with a liquid storage and discharge unit. FIG. 2