SU433079A1 - FEEDER PNEUMATIC INSTALLATION - Google Patents

Description

There are known feeders of a pneumotransport installation for supplying bulk materials to the pressure pipeline, containing a cylindrical housing with a single central loading 1st and two lateral discharge openings and placed in a cylinder, a movable rod with three pistons, the spaces between which form the through cavities for material. However, in the well-known feeders, compressed air can flow out of the discharge pipe into the loading opening through the empty passageways, as a result of which these feeders are supplied with bypass channels with non-return valves for venting air to the atmosphere.

The aim of the invention is to prevent the release of compressed air from the pressure pipe.

This is achieved by the fact that the middle piston is mounted on the rod freely with: the possibility of moving in the axial direction against the stop into one of the outermost pistons.

FIG. 1-4 schematically shows opi-i

discharge feeder in four working positions.

The feeder contains a cylindrical body 1 with one loading opening 2 and two discharge openings 3 and 4, with opening 2 being connected to the loading funnel 5, and opening 3 and 4 with channels -6 and

7- with a pipe 8 of the discharge pipe.

The 8 cylinder is equipped with a rod 9 movable from the drive mechanism with three pistons 1О, 11 and 12, with the extreme pistons Yu

and 12 are rigidly mounted on the rod 9, and the middle piston 11 is mounted freely about the possibility of axial movement. In the covers 13 and 14 of the cylinder, there are holes 15 and 16 for communicating the extreme cavities of the cylinder with the atmosphere.

In the position shown in FIG. 1, the piston 11 is located close to the piston 10, and a cavity 17 is formed between the pistons 11 and 12, into which a material flows from the funnel 5 through the opening 2. When the rod 9 is moved to the right, the cavity 17 is located above the opening 4, and the material is poured out through the channel 7 and the pipe 8 into i

/ 3

pressure pipe (see Fig. 2). At the same time, the cavity 17 is filled with compressed Air. When the rod 9 is subsequently moved to the left (see Fig. 3), the piston 11 remains stationary due to the friction against the cylinder wall until the piston 12 comes close to it. disappears, compressed air is forced out of it back into the pressure pipe, and a cavity 18 is formed between the pistons 1o and 11, which

: The material is displaced through the opening 2. With the further movement of the rod 9 to the left, the curvature 18 is located above the opening 3 (see Fig. 4), and the cycle is repeated.

The subject matter of the invention Feeder of a pneumatic transport installation for supplying bulk materials to a pressure pipeline, comprising a cylindrical body with one central loading and two side discharge openings and a movable rod placed in a cylinder with three pistons, spacing

: between which they form feedthrough cavities for the material, which are made up: with the aim of preventing i from the release of compressed air from the discharge pipe, the middle piston is mounted on the rod freely and can be moved axially up to the stop in one of the extreme pistons.