SU1566153A2 - Arrangement for pulsed air supply - Google Patents

Abstract

This invention relates to a valve industry. The purpose of the invention is to increase the efficiency of the force effect of the jet on the material being processed by equalizing the differential pressure over the length of its propagation. Due to the displacement of the sections of the nozzles 3 relative to each other by the magnitude of the half-wave of propagating inhomogeneities, the addition of the latter occurs in antiphase with the formation of a single continuous front of pressure equal to half the sum of the absolute values of pressure in each jet. The total pressure is less than the maximum pressure in each jet, however, there are no discharge-compression zones, i.e. the resulting jet becomes more uniform. 2 Il.

Description

FIG. 2

The invention relates to reinforcement and is an improvement of the device according to ed. St. No. 1252592.

The purpose of the invention is to increase the efficiency of the force effect of the jet on the material being processed by equalizing the differential pressure over the length of its propagation.

FIG. 1 shows the device, a general view in section; in fig. 2 is a cross section of L —A in FIG. one; in fig. 3distribution

pressure wavelength.

The pulsed air supply unit consists of a housing 1 with an inlet pipe 2 and two outlet openings (nozzles) 3 located symmetrically with respect to the axis of rotation of the seat 4, which ends the inlet pipe 2. The exhaust nozzles 3 are interconnected by an annular groove 5, and the central the hole in the saddle 4 is blocked by the washer 6 with the spherical surface in contact with the flat membrane 7. The washer 6 is moved in the annular groove of the housing 1, and the membrane 7 is fixed in the housing 1 by means of the cover 8.

The lid 8 is provided with a supramembrane wrap 9, bypass channels 10 and a central bore 11 communicating with the inlet 12 of the spool device and the overlapped spool 13 which is freely moving in the cylindrical groove of the spool box 14 connected to the lid 8 through the gasket 15. Zolotnikova The box 14 is provided with a central bore 16, in which the rod 17 of the control electrode is moved (not shown).

The overmembrane cavity U communicates with the atmosphere by means of exhaust ports 18 made in the spool box 14. Chersm inlet 12 of the spool device, as well as through the inlet pipe 2, enters the working medium (air) under the initial pressure. Sections of nozzles 3 are most appropriate to shift relative to each other by an amount equal to 0.5 liters, where l is the wavelength of propagation of inhomogeneities, determined from the ratio

.0.89c1 (P, / P, 1.9) g, where (1 nozzle diameter;

Pi pressure at the nozzle exit;

P-2 pressure of the medium into which it flows

SRSD

The structure works as follows.

When the electromagnet is turned on, the stem 17 goes down and moves the spool 13 until it closes the central opening 1 1 of the cover 8. At the same time, the supply of air under the initial pressure from the cartridge 12 to the supermembrane cavity 9 stops and the central opening 16 in the spool box 14 opens. Between the supermembrane

the cavity 9 and the atmosphere create a pressure drop, and the air from the supramembrane cavity 9 through the bypass channels 10, the central hole 16 and the exhaust holes 18 goes into the atmosphere (the air path is shown with dotted arrows).

Rapid air release from the supramembrane cavity 9 is promoted by a pressure differential between it and the inlet 2, which causes movement upwards from the seat 4 of the washer 6 and the membrane 7. Due to the gap between the seat 4 and the washer 6, the air from the inlet 2 enters the exhaust nozzle 3.

When the electromagnet is turned off, the air entering the inlet of the spool device pushes the spool 13 together with the stem 17 upward to close the spool 13 of the central hole 16 and the air from the nozzle 12 enters through the overflow channels 10 into the supermembrane cavity 9 and causes the membrane 7 to descend stop washer 6 in the saddle 4. As a result, the device is closed. The effective force leading to the closing of the inlet pipe 2 is due to the difference in the areas of the membrane 7 and the central hole of the seat 4, which are under the same pressure. The movement of air in this case is shown by solid arrows.

As a result of the location of the exhaust nozzles 3 at a certain distance from each other, the air jets emanating from them merge into one jet to form an air channel. Due to the displacement of cuts of nozzles 3 relative to each other by the half-wave of propagating irregularities (Fig. 3, curves D and 2 /), the latter are added in antiphase with the formation of a single continuous front of pressure equal to half the absolute values of pressure in each jet (Fig. 3, curve 3). Despite the fact that the total pressure in the resulting jet is less than the maximum pressure in each jet, the absence of intermittent dilution zones in the jet allows for the elimination of possible gaps of the useful product when using the device for mineral processing.

Claims (1)

Invention Formula Pulse air supply device for auth. St. No. 1252592, characterized in that, in order to increase the efficiency of the jet force acting on the material being processed, nozzle sections are shifted relative to each other in parallel planes. atn 1