SU913339A1 - Device for batch-metering agressive liquids - Google Patents

Description

The invention relates to the dosing of materials, in particular to devices for dispensing corrosive liquids.

Known dispensers containing a consumable tank and a pneumatic command ⁵ device, however, it does not provide dispensing of liquids for several consumers [13.

A device for dispensing corrosive liquids is known, containing a supply tank, pneumatic controls, air-lift, pneumatic time and siphon, made in the form of two pipes, external and internal, ₅ shaped truncated cone of variable cross section and carrying in the lower part of the unit coupled through pneumatic command "device with pneumatic relay time associated with the air valve _train Noe siphon [2].

The disadvantage of this device is that it contains a tapered inner tube, leading to

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unstable dynamics of sounding, a pneumatic valve for interrupting a siphon, in which sticking is not excluded, all this reduces the reliability, dynamic and technical characteristics of the device.

The purpose of the invention is to improve the dynamic characteristics of the device.

The goal is achieved by the fact that in the device for dispensing aggressive liquids containing a supply tank, a pneumatic time valve and a siphon-airlift, the inner tube of which is connected with the pneumatic amplifier output, the output of the setter, a “Start” button, connected to the element reverse delay and starting input pnevmorele time, pneumatic valve! the flushing of the siphon-air lift, the OR elements and throttles are installed, and the outer siphon-tube, the airlift, is twice as long and one-quarter smaller in cross-sectional area, than the internal submersible

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a pipe, the inner pipe is connected with its mouth of the spout directly after bending to the outside, and the pneumatic valve of the siphon-air-lift is inserted into the indicated mouth of the spout, and the inlet 5 of the pneumatic amplifier is connected to the output of the OR element, the first input of which is connected to the output of the reverse delay element, the outlet of the pneumorele time is connected to another input of the OR element and 10 through the first choke with the pneumatic valve of the siphon-airlift washing and through the series-connected chokes with the disconnecting input of the pneumorela time 15

The drawing shows a schematic diagram of the device.

The device contains a supply tank 1 constant level, the outer 20 pipe siphon-airlift 2,. the inner pipe of the siphon-airlift 3, fitted with a pneumatic nozzle 4 and having a mouth of an outflow of 5 with a fitted normally closed shut-off pneumatic valve 6 flushing 25 of the siphon-airlift, element OR 7, pneumatic amplifier 8, throttles 9 and 10, reverse delay element 11, pneumorel 12, setting device 13 , pneumogun Start ¹¹ 14. The time relay includes an element of comparison 15, a relay with self-switching 16, a pneumorele 17, a choke 18, a shift element 19, a pneumatic valve 20 and a capacitance 21.

The device works as follows ₃₅ times.

Setter 13 is set while the pneumatic relay 12, proportional to the dose required, and the button 14 is depressed, and turns than ₄₀ roystvo Device for the work. After that, the pneumatic button is released. Then everything happens automatically. The air pulse from the pneumatic button 14 switches on the time relay 12 and simultaneously through the element _{<5 the} reverse delay 11 and one of the pneumatic element inputs OR 7 is fed to the input of the powerful pneumatic amplifier 8 for the delay time that is set so that it is enough to call the siphon. _ The button output is connected via elements 19 and 11 to the input of the element OR 7, the other input of which is connected to the output of time relay 12 (with the output of the comparison element 15) and the starting input pneu-. Morel time 12 (relay nozzle ⁵⁵ self mopodhvatom 16). The camera backwater elements of the time relay 12 is powered through the channel backwater from the setting device 13.

Relay cut-off input (relay control camera 16) is connected to its output via chokes 9 and 10, and through choke 9 to valve input 6, the other input of the element OR is connected to the output of pneumorele 12, and the output of the element OR through the pneumatic amplifier 8 with a nozzle pipes 4. The pneumatic impulse quickly weakens as it is discharged through the nozzle 4 through the liquid and into the atmosphere from the powerful pneumatic booster enters the pneumatic nozzle 4 of the inner immersion pipe 3, where it causes fluid to move through the mouth of the outflow of spout 5 by 1/4 less than that The internal pipe 3, the liquid quickly accumulates in the mouth of the outflow 5. After the pneumatic signal in the nozzle 4 is weakened, the liquid in the external pipe of the siphon 2 continues to move downwards in a continuous flow, which creates a vacuum in the internal pipe 3, which causes the siphon. The magnitude of the vacuum depends on H _a and; the more H ^, the greater the flow rate of the fluid q /, since π »_ίί ·-ΰ * o '.

the smaller the

a smaller vacuum is required to trigger the siphon, since

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After a predetermined time has elapsed, the pneumoregle time 12 is triggered and. produces a powerful pneumo signal. sufficient to stop the siphon by blowing fluid from both pipes through the other input of the element OR 7 and pneumatic amplifier 8 to the nozzle 4 of the airlift inner pipe 3. This same signal from the pneumorel 12, but with some delay sufficient to interrupt the siphon, comes to the normally closed shut-off pneumatic valve 6 and opens it, letting in fluid to flush the outer pipe 2 and then the entire transport system. With the same delay on the choke 10, sufficient for flushing, the same signal arrives at the shut-off input of the pneumorel and turns off the entire system, bringing it back to its original state.

Such a design of the siphon-airlift and the scheme of its inclusion can significantly improve the dynamic characteristics of the device.

Claims (1)

Claim A device for dispensing corrosive liquids containing consumption5 913339 * The tank, the pneumatic time and siphonerlift tank, whose inner tube is connected to the pneumatic booster outlet, is connected to the back-up channel of the pneumoreme device, the pilot output, the Start pneumatic window, connected to the reverse delay element and the starting valve of the pneumatic time switch, a siphonerlift valve, which differs from In order to improve the dynamic characteristics of the device, the OR element and throttles are installed in it, and the outer pipe of the airlift-siphon is made twice as long and one quarter smaller in cross-sectional area, 15 than An immersion submersible pipe, the inner pipe being articulated with its mouth of the spout immediately after bending out, and the pneumatic valve of the washing 20 is embedded in the mouth of the spout being inserted a siphon-airlift, and the input of the pneumatic amplifier is connected to the output of the OR element, the first input of which is connected to the output of the reverse delay element, the output of the pneumorele time is connected to another input of the OR element and through the first choke to the pneumatic valve of the siphon-airlift and through series-connected chokes with the disconnecting input pneumoreleum time.