SU49323A1 - Dosing device for dosing of liquids - Google Patents

Description

Piston gauges for metering liquids are known in which the pistons are fitted with valves.

In the proposed measuring device, a siphon tube is attached to the piston, the suction head, whose knee is located above the piston and is filled with liquid as the piston is lowered. Such a device is intended to receive a drain of a certain portion of the liquid only if it has previously filled the sub-piston space completely.

In the schematic drawing of FIG. 1 shows a longitudinal section of the measuring device with a piston crown, and FIG. 2 is the same with a raised piston.

The measuring device consists of a hollow cylinder, the upper base of which is spherical and is integral with the walls, and the lower thickened bottom, e 5 is connected to the walls of the cylinder by a thread. In the upper part, the cylinder is provided with holes 70. In the cylinder there is a piston 5, in the center of which the long end of the siphon tube passing through the piston is fixed. The bottom bottom 5 of the cylinder is equipped with a suction tube 5, a suction head, a steam valve b and a drain tube P, which includes a long, siphon end, and a piston 5 equipped with a discharge valve. 7. A rod 77 is attached to the upper part of the siphon, passing through the upper base 2 of the cylinder and ending, with the handle 12.

At the position of the piston 5 at the bottom of the cylinder 7 (Fig. 1), the measuring device is connected, with the help of the tube 8, to the measured liquid. By raising the handle J2, the piston 5 is raised (FIG. 2), and the liquid to be measured, under the action of atmospheric pressure, raised to the valve 6, fills the space 75 under the piston 5. After that, the piston 5 is again lowered by the handle 72 to the lower position ( Fig. 1). During this movement, the fluid under the piston closes valve b under the action of the pressure of the piston, opens valve 7 and enters the sub-piston space 7, and fills the short end of the siphon. As soon as the liquid level in the piston space 14 reaches the position about, the liquid from the measuring device through the siphon and the pipe 9 will drain into the receiving dish.

If, when raising the piston 3 to the piston space 73, a volume of liquid less than the set volume is taken, then after the piston is lowered, the liquid from the measuring device through the siphon will not pour out, since it will not reach the level a6.

The subject matter of the invention.

A measuring device for dispensing a liquid in the form of a hand pump, the piston of which is equipped with a valve, characterized in that to drain a certain portion of the liquid only after filling it with

A siphon tube 4 is attached to the piston space to the piston 5, having a suction elbow located above the piston and intended to be filled during the passage of fluid through the piston valve 7 when the piston is lowered to its original position.