RU2001860C1 - Installation for pneumatic delivery of friable material from roll mill machine - Google Patents

Description

the bottom of the dump-dump 10, the second supply gas pipe 11, an adjustable one-way throttling device for delaying the moment of closing the shutter 12, a release valve in the form of a two-position switch for gas flow 13. the executive pneumatic cylinder for turning the shutter 14, rod 15. two-arm lever 16. counterweight 17, lower roller cavity machine 18, receiving funnel 19. curved guide tray 20, valve axis 21. hole in the receiving funnel 22, transport pipe 23, unloader 24. collector 25. dust separator 26, source times voltage 27, the damper fixing bolt 28 for measuring nipple transport gas parameters 29,

Designations of the directions of motion indicated by arrows: A — receipt of the initial bulk material into the receiving cavity of the roller mill, B — grinding raw material. B - rotation of the grinding rollers, G - compressed gas from its source to the pneumatic cylinder of the ramp, D - compressed gas to the pneumatic cylinder of rotation of the damper, E - extension of the rod that is triggered to open the damper, F - crushed material to the receiving funnel, 3 - transporting gas from the surrounding media, I - aerosol mixture through the transport pipeline, K - transporting gas through the collector before being discharged into the atmosphere. L - return of the rod to its original position, triggered by the closing of the valve.

The principle of operation of the device is as follows.

The source material, flowing in the direction of arrow A into the receiving cavity 4, causes the triggering of the uroan 5 signaling device, on command of which the rollers of the feeding mechanism 6 begin to rotate, supplying material in the direction of arrow B about the gap between the rotating towards each other, as shown by arrows U grinding mills 1.

At the same time, the solenoid valve 7 is opened, allowing compressed gas to pass from its source 8 through the first supply gas pipe 9 in the direction of arrow G to the pneumatic cylinder of the dump-dump mechanism 10, which thereby makes the axes of grinding orezo closer together, i.e. halt. Grinding rollers with egogl with their specially processed cylindrical surfaces grind the initial bulk material to a predetermined fractional composition, feeding it further in the direction of arrow G.

At the same time, compressed gas through the second gas supply pipe 11 was sprayed along arrow D through an adjustable one-way throttling device 12 and 5, the on-off gas flow switch 13 flows to the pneumatic cylinder 14 without delay, causing its rod 15 to extend in the direction of arrow E, Rod 15, by means of kinematically 0 the two-armed lever 16 with it, equipped with a counterweight 18, rotates the shutter 3, then holding it in the open position.

Crushed bulk material through

5, the lower cavity 18 enters a receiving funnel 19 made with a curved guide tray 20.

The receiving funnel 19 is equipped with a damper 3 mounted on the axis 21, placed

0 at the output end of the guide log 20 with the possibility of its extension with its surface in its open position.

Bulk material moving along the curvature along the curved guide tray 20 and the open shutter 3, is picked up by the flow of transporting gas penetrating through the holes 22 in the housing of the receiving funnel 19, as well as coming from the roller

0 of the machine along arrows 3, mixes up to the extent of the air mixture on contact with. the shutter 3, moves along the transport pipeline 23 in the direction of the arrow And to the unloader 24, where it is deposited for 5 s and from where it is discharged by the lock gate 25. sent further to the subsequent technological steps.

In this case, the transporting gas, removed from separate parallel unloaders 24, is collected about the collector 30. From where, through a system of dust separators 26, it is removed to the atmosphere using a discharge source 27

With the prevalence of the intensity of the null mechanism rather than using the input material on the roller mill and, as a result, emptying the receiving cavity 4, this signal gives an instruction to close the electromagnet

0 valve 7, stopping tef., The very feed with compressed gas pnevmitsiln dré mechanism of the dump-dump 10 and the actuating pneumatic cylinder 14, lowering their internal cavities, the pressure of the pressure response, is caused by the low-pressure apl. At the same time, however, some are pulled; ; m due to the adjustable ASHP-throttle throttle, losir.t; .megg. n the initial position is, for example, in the direction::, and the olives are L rod 15, turning and ... i l

the flap 3 in the closed position, thereby preventing an increase in the total volume of the gas transporting the installation.

As the initial bulk material accumulates in the receiving cavity to a certain limit, the level 5 sensor is activated again and the choking process with the instantaneous opening of the shutter 3 is repeated.

In order to clear and restore the operability of the transport pipeline in the event of its blockage, the service personnel of the enterprise, traditionally not stopping the drive motor of the roller mill, carry out the grinding mill. thereby transferring the shutter 3 to the closed position, which prevents the possibility of normal pneumatic cleaning of the receiving funnel 19 from the material settled in it.

A quick exit from a deadlock created in this way is achieved by switching the unlocking device 13, which is represented by a two-position gas flow switch, providing emergency supply of the pneumatic cylinder 14 with compressed gas directly from its source 8 (Fig. 3).

If the solenoid valve 7 is malfunctioning and the roller machine needs to be operated, in the order of a temporary measure in the manual dump-blade mode, the shutter 3 is held in the open position by the fixing screw 28, and in the closed position when the kinematic connection between the device elements is disconnected due to the repair of the roller machine carried out without stopping the mill (for example, when replacing the grinding rollers), the shutter 3 is held in the closed position, the counterweight 17 (figure 5).

The fitting for measuring the parameters of the distribution gas 29 is installed.

INSTALLATION FOR PNEUMATIC FEEDING OF BULK MATERIAL FROM THE MILLING ROLLER MACHINE, containing a receiving funnel made with a curved guide tray communicating with its inlet with the lower cavity of the roller machine, and the outlet with the initial section of the transport pipeline and the installed drain pipe, also installed a valve connected by a similar channel to the source of compressed gas, the outlet channel at the beginning of the transport pipeline facilitates the conduct of aerodynamics cal adjustment setting.

Currently, due to the lack of

simple and efficient devices that ensure the reliability of pneumatic transportation in mills, the speed of the transporting gas in the pipelines is 1.5 - 2.0 times higher than the design values of 20 - 22 mm / s, resulting in a high specific energy consumption of the process of sosta flour production, which is

95.3 kWh / t, with a third of the given value, i.e. about 32 kWh / t, consumed by pneumatic blower machines.

The implementation of the proposed device

It opens up the prospect of the possibility of reducing the transporting speed to design and lower values without compromising reliability of at least 1.25 times, which with a complex dependence of the energy intensity on the speed value closest to the quadratic one, the expected energy consumption will decrease by 1.252-1.565 times. those. reaches a value of 32; 1.565 20.5 kWh / h, creating savings of the order of 32 - 20.5 11.5 kWh / t,

that in terms of energy consumption indicators of flour production will be about 11.5: 96: 3 x 100 x 12.2%.

(56) Ptushkin A. et al. To reduce energy capacity // Flour-and-elevator and animal feed industry, 1984, No. 4.

Ptushkin A, T. Automatic air flow control in mill pneumatic conveying systems. M: TsINTI of the State Committee for Gas of the USSR, ser. Mechanization and automation of production .1966, pp. 25 - 34.

Dorfman M.H. Pneumatic transport of grain and products of its processing. M .; Khlebizdat, 1960, p. 43, Fig. 9.

scrap by means of the first inlet pipe - with a pneumatic cylinder of the mechanism of a dump-dump of grinding rolls,

characterized in that, in order to ensure automatic operation, increase operational reliability, ease of maintenance and repair, reduce aerodynamic drag

and to reduce energy consumption, it is equipped with an executive pneumatic cylinder for turning the two-position shutter, communicated by means of a second supply gas pipeline with a first, two-position flow switch

gas included in its output channel and one input to the second supply gas pipeline, and the second input channel in communication with the source of compressed gas, and adjustable one-way throttling device installed in the section of the second supply gas pipeline between its communication areas with the first supply gas pipeline and the input channel of the two-position switch, while the two-position shutter is connected to the rod of the actuating cylinder of its rotation by means of a double-arm lever and is located at the output the end of the curved guide tray with the possibility of its extension with its surface in its open position, the funnel in the lower part is made with a stop screw for fixing the shutter in its open position, the two-arm lever is made with a counterweight to hold the shutter in

its closed position, and the initial section of the transport pipeline is made with a fitting for measuring the parameters of the transporting gate.

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