SU874532A1 - Apparatus for introducing loose material in transporting pipeline of suction-type pneumatic transport installation - Google Patents

Description

which can lead to clogging of the material and the termination of the input material.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the air inlet nozzle is provided with a reflective cantilever fixed in it, the free end of which is located under the first tray at a distance of 1-10 cm from its lower edge, and the discharge nozzle has an ellipse shape in cross section that is smaller than the axis which is equal to the diameter of the air inlet, while being tangential to the lower edges of the chutes, forms an elevation angle in the direction of transport equal to 3-15, and between the side walls of the mixing chamber and t Trap holes are formed by trap eagles.

In Fig.1 schematically shows a device, a General view in section / figure 2 is the same, top view; on fig.Z - section aa in figure 1.

The device contains a mixing chamber 1, the side walls 2 of which form the loading pipe. An air supply 4 and a discharge 5 nozzles are connected to the chamber with the help of flanges 3. The chamber contains a frame b, equipped with a device 7 for adjusting its angle of inclination.

A material board serves as a page for sleep. 8. Trays 9 are located on the frame b along it, ending at the bottom with an arcuate cantilevered edge 10. Air inlet 4 has a reflective visor 11 at its outlet, end 12 of which is located at a distance from the edge 10 of the first tray . Between the side walls 2 of the chamber and the ends of the trays 9 there are through slots 13 The nozzle 5 has an ellipse shape in cross section, the smaller axis of which is equal to the diameter of the nozzle 4. The trays are mounted on the frame in such a way that the tangent to their lower edges 10 forms an angle of lift d in the transport direction, equal to 3-15. A gap 14 of confused-diffusor form is formed between adjacent trays.

The device works as follows.

A grain pile from the skirting board 8, which oscillates, goes to the upper part of the trays 9.

The presence of p yes trays, installed- ;; along the mixing chamber, ensures uniform distribution of the input material over the entire cross section. The grain, together with a small sex in the amount of 4/5 of the total mass, slipping and rolling along the upper curvilinear part of the trays, falls into the confuser-diffuser gaps 14, where its layer is formed. The remaining 1/5 of the total amount of incoming grain heaps rolls into the mixing chamber through slots 13, designed to bypass the long fiber of that straw material. The formed layer then easily rolls in thin streams along the curvilinear surfaces of the lower parts of the trays and, detached from the edges 10, enters the high-speed air flow, which is provided by the visor 11. Having entered the mixing chamber, the air stream begins to expand due to the formation of a diffuser between the lower edges 10 of the trays and the bottom surface of the chamber and moves, gripping the material, to the nozzle 5, which has an ellipse shape at the entrance. From PA / tube 5, the aero mix enters the transport pipeline.

As a result of expansion, the jet is kept in the chamber without going upwards and can be adjusted (set) depending on N. As the length of the mixing chamber increases, the probability of air dislodging is greater. To do this, reduce the height H and angle d. increase. The magnitude of the elevation of the tangent is limited by the magnitude of the larger axis of the ellipse (inlet nozzle 5). This is due to the need to eliminate clogging material between the last tray and the wall of the chamber.

The reason for blocking is that with a large angle of ascent, the lower edge of the latter is pressed against the front wall of the chamber. The lifting angle is adjusted by lowering the first tray above the reflective visor and raising the latter to a certain height, taking into account its performance.

The height of the bottom edge of each tray above the bottom surface of the mixing chamber increases from the first to the last. The first tray near the reflective visor has the smallest height of the material falling, and the last one has the greatest. Hence, the distance of the trajectory of the particle is different - the first tray is smaller than the last.

The conditions for the set of the initial velocity of the transported material for the entire longitudinal section of the mixing chamber are the same and are due to the different air velocity. At the first tray, it is slightly higher than that of the last one when entering the discharge pipe. Therefore, the material is uniformly carried away from the mixing chamber to the discharge station 1 without increasing the concentration at the inlet of the latter. Therefore, it eliminates the knocking of material from the mixing chamber through the gaps between the trays. The proposed device can transport straw of any humidity. For this, it is necessary to leave only 3-4 trays on the frame in order to keep the air jet within the limit of expansion. The damageability of the material during transport is minimal and less than the mechanical transporting working bodies of the combine (augers, elevators) 10-15 times. The proposed device provides high reliability of the entire pneumatic system during transportation of grain heap of any moisture in the combine. At the same time, the process of mixing air with the transported material is improved, the dislodgement of the grain pile from the mixing chamber is eliminated, and the reliability of its entry into the pipeline is improved. The plant capacity is increased by 15-20% compared with the known. In addition, a pile of grain with contamination of 5–8% and with some content of long-fiber impurities of straw can be loaded into the pipeline. The invention of the device for inserting a bulk material (Terial into the transport pipeline of an injection pneumatic conveying installation, containing a mixing chamber with inlet, air inlet and discharge pipes and installed in it with the ability to adjust the angle of inclination of the frame on which the trays having the shape of sinusoidal arcs are mounted and arranged in series along the mixing chamber with the formation of a confused-diffuser gap between them adjacent, characterized in that, in order to increase reliably In operation, the air inlet nozzle is provided with a reflective visor cantilever-fixed in it, the free end of which is located under the first tray at a distance of 1-10 cm from its lower edge, and the discharge nozzle has an ellipse shape in cross section, the smaller axis of which equal to the diameter of the air inlet, tangentially drawn to the lower edges of the chutes, forms an elevation angle in the direction of transport equal to 3-15, and between the side walls of the mixing chamber and the ends of the chutes are formed through gaps. Sources of information taken into account in the examination 1. USSR author's certificate in application 2572436, cl. In 65 G53 / 40, 1978 (prototype).

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Claims (1)

Claim A device for introducing bulk material into a transport pipeline of a pressure pneumatic conveying device. tanovka containing a mixing chamber with loading, air supply and discharge pipes and installed in it with the possibility of adjusting the angle of inclination of the frame, on which are fixed trays having the shape of sinusoidal arcs and located in series along the mixing chamber with the formation of a confuser-diffuser gap between adjacent ones, characterized in that, in order to increase reliability in operation, the air supply pipe is equipped with a reflective cantilever mounted in it, the free end of which is laid under the first tray at a distance of 1-10 cm from its lower edge, and the discharge pipe has an elliptical cross-section, the smaller axis of which is equal to the diameter of the air supply pipe, while the tangent drawn to the lower edges of the trays forms the lifting angle in the direction transport equal to 3-15 °, and between the side walls of the mixing chamber and the torn trays through holes are formed.