SU839932A1 - Chamber feeder of pneumatic unit for transfer of loose materials - Google Patents

Description

(54) CHAMBER FEEDER PNEUMATIC TRANSPORT

INSTALLATIONS FOR BULK OVERLOAD

MATERIALS

nozzles conical nest. In addition, the valve stem is provided with a stroke length limiter on the locking plate, made in the form of adjustable

stop.

FIG. 1 shows a chamber feeder, general view; FIG. 2 - shut-off valve, general view; in fig. 3 — node 1 in FIG. 2

The chamber feeder of the pneumatic conveying installation for transshipping bulk materials, mainly apatite concentrate, contains a tank 1 with a material pipeline 2 located inside, equipped with an inlet cone nozzle 3. A gas distribution grid 4 and a disc valve 5 with a pneumatic cylinder 6 are installed at the bottom of the tank. rod 9, On the inlet cone nozzle of the pipeline there is a conical socket 10 with which the elastic sealing element interacts And rectangular we, located in the annular groove 12 of the locking plate. The edges 13 of the groove are rounded, and the sealing surface of the walls of the conical nests is bevelled relative to the surface of the sealing element at an angle of approximately is and thus forms the seat of the valve closure plate. In addition, the shut-off valve is equipped with an aerating element 14, made in the form of a perforated tube, and a valve stop is installed on the valve stem, which is an adjustable stop 15, Capacity 1 is equipped with a neck 16 for supplying the transporting material, and a pipe 17 for supplying compressed air. . To supply air to the aeration. element 14, the latter is equipped with a nozzle 18,

The device works as follows.

Bulk material is loaded into the container through the neck 16, and then the neck 16 is sealed, after which the shut-off valve 5 closes the cone nozzle 3 at the entrance of the material conduit 2. To do this, compressed air is fed into the lower cavity of the pneumatic cylinder b. In this case, the container is locked.

The valve 5, reinforced by means of a hinge 8 on the rod 9, moves upwards. When the plate 7 is moved upwards, the sealing surface of the conical nest 10 located inside the nozzle 3 interacts with the surface of the sealing element 11 located in the groove 12 of the plate 7,

As a result of this interaction, the sealing element 11 contacts the sealing surface of the socket 10 and cleans it from sticking

bulk material. This ensures a tight fit to each other of both parts of the seal and, as a result, reliable sealing of the material line 2.

In order to protect the elastic sealing element 11 from a possible notch when deforming qi xi in the process of sealing, the edges 13 of the groove 12 are rounded, g

Upon further movement of the plate 7 upwards, the lower surface of the pneumatic cylinder b interacts with the stop of the plate 7, made in the form of an adjustable stop 15, and limiting its stroke so as to create a minimum specific pressure on the sealing element 11 with sufficient sealing of the material line 2.

As the sealing element 11 depreciates and the pipeline 2 is depressurized, the stop 15 adjusts the stroke of the plate 7. To do this, the adjusting nuts of the stop 15 are displaced along the rod 9 of the shut-off valve 5, thus increasing the stroke of the plate 7, which creates greater pressure on the sealing element 11 to the sealing surface the conical socket 10. As a result, the wear of the sealing element is compensated for and the tightness of the pipeline 2 is restored.

After sealing of the material line 2 thus performed, compressed air is supplied through the pipe 17 under the gas distribution grid 4, and the pressure inside the vessel 1 rises to the level required for transporting the material through the material line 2.

To unload the bulk material from the tank 1, the shut-off valve 5 opens the entrance of the material pipeline 2. To do this, the compressed air is pushed into the upper cavity of the pneumatic cylinder b and simultaneously pumped into the upper cavity of the pneumatic cylinder 6 and at the same time the pTG trap 18 serves compressed air to the aerating element 14, as a result of aeration granular material directly under the plate 7, as well as under the action of the force developed by the pneumatic cylinder 6, the locking plate 7 freely moves downwards and opens the entrance to the material pipeline 2. The fresh air supplied through the nozzle 17 passes through the gas distribution grid 4 and aerates the bulk material on it, forcing it into the inside of the material.

Claims (3)

Claims 1. Chamber feeder of pneumatic conveyor for reloading bulk materials, primarily a prefabricated concentrate, containing a container with a material pipeline located inside, equipped with an inlet cone nozzle, mounted under the latter on a rod, that rail-type shut-off valve and gaoras; limit the grid, characterized in that, in order to increase the reliability and efficiency of its operation, the valve has an annular groove made in the conical surface of the locking plate and is provided with a rectangular sealing element installed in the latter; n the conic nest mounted inside a nozzle. 2. A feeder according to claim 1, characterized in that the valve stem is provided with a length limiter hbda. Locking plate, made in the form of an adjustable stop. Sources of information taken into account in the examination 1. USSR author's certificate 438593, cl. B 65 G 53 / 18,1973. 2. Lifting and transport vehicles. Scientific works VNIIPTma. Under re. IN AND. Melik-Gaidakova. Sat 1, issue. 3., M., 1974. with. 24-30. 17 / Fi.2 and