SU480913A1 - Liquid dispenser - Google Patents

Description

one

The invention relates to dispensing devices and is intended for use, for example, in analytical instruments, autotitrators, etc.

Pneumatic-free pneumatic liquid dispensers, in which a plenum channel connected to a control pneumatic source, is connected, the closed chamber is connected by a filling channel in the form of an overflow hydraulic shutter, to a vessel of a metered liquid, and an outlet channel, filled with an internal siphon, is connected to a liquid apparatus, and an output channel, which is filled in the internal siphon, is connected to a liquid device. for example, with an analog cell device.

The known dispensers do not provide the necessary accuracy of dispensing due to the considerable immersion and the end of the dose dispensing process.

Generally dispenser has a higher accuracy | Thanks to the fact that the chamber is equipped with an overflow channel with a hydraulic shutter at the outlet, its upper edge is located below the upper edge of the overflow hydraulic shutter and the upper edge of the outlet channel connected to the chamber as communicating vessels, and the pneumatic canal is connected to the pneumatic channel; logical element of the command device.

The drawing shows the dispenser described.

consisting of a closed chamber 1 with an overflow channel 2; output channel 3 connected to chamber I as communicating vessels; overflow valve 4 with

side filling chamber 1 and an additional hydraulic valve 5 from the side of its overflow. The chamber 1 is connected by the upper part by the pneumatic channel 6 to the source 7 of the control pneumatic influence, as

which may be pneumatic logical logic element. The upper edge of the overflow hydraulic shutter 4 and the upper edge of the output channel 3 are located along the top of the upper edge of the overflow channel 2. And the last

made vertically in order to ensure the adjustment of the dose delivered by the dispenser. The magnitude of the dose; is shown but ngkale 8. The dispenser works as follows.

In the chamber 1 through the hydraulic shutter 4 serves a portion of the liquid, for example, an analytical sample of a controlled process medium, according to the value of the known amount of the dose that should be given

dispenser in the receiver, for example in the analytical cell of the titrator. The liquid Iorci, after passing through the path 4-2-5, will fill the chamber 1 to the upper edge of the overflow channel 2. This will result in the output channel 3

appropriate level. In the required command from the source control

pneumatic pressure is supplied to the pneumatic pressure through channel 6 to chamber 1, and the liquid begins to flow out of it through the output channel 3 until it is fully extruded. With this method of issuing a dose, the pneumatic pressure helps to squeeze out all the liquid from chamber 1 and the output channel 3 completely without a residue, which significantly improves the accuracy of the dose.

Subject invention

A fluid dispenser containing a closed chamber connected by a pneumatic channel to a source of control pneumatic impact, a filling channel in the form of an overflow hydraulic valve and an outlet channel, in order to improve metering accuracy, the chamber is equipped with an overflow channel with a hydraulic gate at the outlet, and the upper edge is placed below the upper edge of the overflow hydraulic shutter and the upper edge of the outlet channel connected to the chamber as communicating vessels, and to the pneumatic channel connected, mainly, pneumatic logic element of the command device.