SU438793A1 - Vibrating feeder - Google Patents

Description

one

The invention relates to the mining industry.

Vibrating feeders are known, including a working platform and a pneumatic-neural pulsator, which has an elastic force element forming the chamber and a spool pair with channels for supplying and exhausting compressed air.

The proposed feeder differs from that known in that the power element is designed as a diaphragm and connected to it along the periphery of a rigid case in which a spool pair is mounted, which contacts its spool with the diaphragm in the place of its largest deflection. This simplifies the design of the feeder.

The diaphragm can be provided with a rigid plate attached to its upper part, located relative to the working platform with a gap not exceeding the amplitude of the working platform oscillation in the place of their contact.

The spool pair in the lower part can be made with a cavity permanently connected with the chamber of the power element.

FIG. 1 shows the proposed feeder; in fig. 2 is a section along A-A in FIG. one.

Vibrating feeder consists of a working platform 1, installed in the excavation on supports 2. One end of the working platform

installed under duchka 3 (the flow of rock mass), the other is “hell with vehicles 4. Pneumatic pulsator 5 is installed directly under the cantilever overhang of the working platform, which stands

towards vehicle loading or

under the central part of the working platform

the middle between supports 2.

The pulsator (Fig. 2) consists of a body b

with a plate 7, on the periphery of which there is an elastic force element, made in the form of a diaphragm 8. In the housing 6, in the center of the largest deflection of the diaphragm, in particular in the central part, there is a spool pair including a stationary cylinder 9 and a movable valve 10. In the body the spool pair is made of the supply channels 11, periodically communicating with the distribution groove 12, constantly communicated

channels 13 with a working chamber 14 diaphragms, and exhaust channels 15, made in one or more Russ, which periodically communicate with grooves 16. The front part of the spool on the upper side is in contact with the diaphragm in the place of its greatest stroke. For more precise operation of the spool, its mounting to the diaphragm is also permitted. In order to use the transverse area of the spool in the lower part of the spool pair, a cavity 17 is made, which is permanently connected to the working chamber 14 by channels 13.

For the shock loading nature of the working platform, a rigid plate 18 is attached to the outer surface of the diaphragm, which is located under the working platform with a gap S that does not exceed the amplitude of the oscillation of the platform 1 in the static position of the pulsator.

Vibrating feeder works in the following way.

When 1 is turned on, compressed air passes through channels 11, groove 12 and channels 13 — into working chamber 14 and cavity 17. Under the action of compressed air, diaphragm S moves upwards, affecting working platform 1 and raising it upwards. At this time, the spool, lifting up, with its cut-off edge of the grooves 12 closes the channels 11 and, in turn, connects the grooves 16 to the exhaust channels 15. Compressed air enters the chamber 14 and the cavity 17 stops, after which the exhaust from these chambers begins through channels 13, grooves 16 and channels 15. By this time, pad 1 will oscillate upwards and begin to descend downwards. Under the influence of the forces of the platform 1 and the elastic properties of the diaphragm, the spool together with the diaphragm moves down to its original position. When moving down, the spool closes the exhaust ports 15 and opens the intake ports 11, the compressed air enters the chamber 14 and the cavity 17, and the cycle repeats. Thus, the oscillation process of the site 1 is started and maintained, and the effect on its pulsator 5 is automatically synchronized and in phase with the oscillations of the site.

When a plate 18 is installed on the diaphragm 8 and the gap S is created between the platform and the platform 1 in their static position, the working process proceeds in a similar way, with the only difference that in the path of the diaphragm 8 with the plate 18, potential energy accumulates in the Selection gap 5 and on platform 1 strikes are delivered. The impact force is controlled by the size of the gap S. If the gap 5 is equal to half of the working amplitude I fluctuations of site 1, then after the starting period the impact mode of the pulsator practically stops, since there will be no gap S between the power element of the pulsator and the working platform due to the following mode the work of the power element relative to the working platform.

Item of Contents

Claims (3)

1. A vibrating feeder including a working platform and a pneumatic pulsator, which has an elastic force element forming a chamber and a spool pair with channels for supplying and exhausting compressed air, characterized in that simplifying the design, the power element is designed as a diaphragm and the software connected to it on the periphery of a rigid case in which a spool pair is mounted, which contacts its stem with the diaphragm in the place of its greatest progiba. 2. A feeder according to claim 1, characterized in that the diaphragm is provided with a plate attached to its upper part located relative to the working platform with a gap not exceeding the amplitude of the working platform oscillation in the place of their contact. 3. Feeder pop. 1, that is, with the fact that the spool pair in the lower part is filled with a cavity that is constantly in communication with the chamber of the force element.