SU383466A1 - AIR DISTRIBUTOR OF PNEUMATIC DRIVE OF SPRAY FREE SHIPPING MACHINES - Google Patents

Description

one

The invention relates to the field of enrichment of minerals and minerals, such as coal, and may be used to drive a pistonless jigging machine.

Known air distributor of pneumatic drive besiorshiyevy jigging machines, comprising a housing with an annular caialeus, vouskom and vynusnuyu valves.

The proposed air distributor

supplies three pneumatic cylinders arranged one above the other, with the porshei of the upper cylindrical joint with the inlet clan, the piston and the silo with the outlet, and the stem of the middle pneumatic cylinder is two-sided to act on the pistons of the upper and lower cylinders.

This embodiment of the air distributor ensures the prevention of emissions of compressed air into the atmosphere.

FIG. 1 shows the general structure of the drive of a machine with an air distributor; in fig. 2-scheme of the air distributor.

The pneumatic actuator contains a source of compressed air to which air ducts 2-5 are connected, connecting air distributor 6 with a source of compressed air 1. Air is supplied through these air ducts to ensure operation of air distributor 6. Air ducts 3 and 4 are equipped with spools 7 and S with electric or other type frustration. Air ducts 9 v (10 are connected through a 1 air distributor 6 working chamber 11 of the machine with a source of compressed air.

Air diffuser, consisting of a body 12 with an annular channel 13 and a courser 14 and an outlet 15 valves,

The three piston cylinders 16, 17 and 18 are placed one above the other by means of pneumatic cylinders. The piston 19 of the upper cylinder 16 is connected to the vnuskny valve 14, the norngen 20 of the lower cylinder is connected to the valve 15, and the rod 21 is middle

Pneumatic cylinder 17 is double-sided to act on the runners of the upper 16 and lower 18 cylinders. The intake valve 14, depending on its position, opens or closes the path of compressed air from its source 1 to the chamber 11. The valve 15 opens or closes the path to the air from the chamber 11 to the atmosphere.

Power pneumatic cylinder / 7 opens the inlet 14 and outlet 15 valves.

The valve 14 is connected to the piston 19, the displacement of which causes the same displacement of S1Iian 14. The chamber above the piston 19 is permanently connected by the channel 22 and the air duct 5 with a source of compressed air.

The chamber above the piston 19 by the channel 23 is permanently connected to the atmosphere. Thus, the piston 19, under the action of the pressure difference, permanently applies the valve 14 to the seat 24. A folding sheath 25 (such as fur or an accordion) is attached to the valve 14 and the housing 12 of the copadem. When the valve 14 is pressed to the seat 24, the shell 25 prevents the compressed air from coming from its source / into the working chamber 11. The design of the exhaust valve 15 is similar to that of valve 14. Compressed air enters the piston through channel 26. The chamber is above the piston of the atmosphere with channel 27. Piston it is constantly under pressure; it has an upper valve 15 up to its saddle and the shell prevents air from exiting the working chamber to the atmosphere.

The chamber above the piston 28 of the pneumatic power cylinder by the channel 29 and the air duct 4 is connected to a compressed air outlet. The chamber under the piston 28 by the channel 30 and the air duct 3 is also connected to a source of aerated air /. The piston 28 is mounted on the rod 21, the length of which is equal to the distance between the pistons pressing the valves 14 and 15 to the seats in the position when the valves are closed. In this position of the valves, the piston 28 occupies the middle position in the power pneumatic cylinder 17.

The stroke of each of the valves is limited on the one hand by the saddle, and on the other hand by the adjustable stop. With HOMOHUI unora 31, the stroke of the intake valve is set, and with the aid of unor 32 it is the exhaust valve.

The operation of the air distributor is performed by spools 7 and 8. The spool 7 through kiaal 29 in one position connects the chamber above the piston 28 of the power pneumatic cylinder with a source of compressed air, and in another position, blocking the flow of compressed air, connects this chamber with the atmosphere. The spool 8 in the same way through the drip 30 communicates the chamber under the piston with a source of compressed air or with the atmosphere.

In the position of the air distributor shown in FIG. 2, the pressures of iodine by the piston 28 and above it are equal — both of these chambers are connected to a source of compressed air. The chamber above the piston 19 is communicated through the channel 22 with a source of compressed air 1, and the chamber beneath it with the cup 23 is connected with the atmosphere. Under the action of the pressure difference, the piston J9 moves downward and presses the valve 14 to the seat 24, and no air enters the chamber 11. In the same way, the valve 15 is pressed to its seat, and it blocks the air outlet from the chamber 11 to the atmosphere. Pistons inlet 14 and exhaust valve 15, of a sense when closing valves rod 21, set the piston 28 in the middle position.

The command from the control device to the compressed air inlet to the chamber 11 enters the spool 7, which, by blocking the entry of compressed air into the chamber and the piston 28, connects this space with the atmosphere. Under the action of the pressure difference, the piston 28, overcoming the opposition

piston 19 (since the area of piston 28 is larger than the area of porsche 19} will push piston 19, and with it valve 14 to pore 31. At the same time, compressed air passed into the gap between valve 14 and saddle 24 and

further along the annular duct 13 of the air distributor and the air duct 10 enters chamber 11. Under the action of pressure of compressed air, water flows out of chamber II, weighing the bed above the sieve.

To stop the intake of air, a command is issued to spool 7, which connects the chamber above the piston 28 to the compressed air supply 1 and closes the connection of this chamber with the atmosphere. After this pressure iad

the piston 28 is aligned with the pressure under the piston 28 and the piston 19, closing the intake valve 14, at the same time returning the purr 28 to the middle position. Both when opening valve 14 and when it is closed, valve 15 remains closed.

After the intake valve is closed, a pause occurs during the cycle of water oscillation in the Maipgne, during which the bed settles on the sieve.

During the weighing of the bed by the sieve and its settling on it, an enrichment process takes place - bed separation by specific weights. In the upper layers of the bed, particles with a lower specific gravity are concentrated, and in the lower layers, with a larger specific gravity. During the rest of the cycle, the stratification does not occur and the faster this part of the cycle proceeds, the more efficiently, other things being equal, the machine will work.

After the bed has settled on the sieve, the air is discharged from the chamber 11 to the atmosphere.

This happens as follows. A comma from the control unit enters the gold chain 8, which, closing the pressurized air into the chamber under the piston 28, connects this chamber to the atmosphere. Under the action of the pressure difference piston 28, overcoming resistance

the piston of the exhaust valve 15 will lower this piston, and with it the valve 15 up to the stop 32. At the same time, the air, having passed into the gap between the valve 15 and its seat, will leave the chamber 11 into the atmosphere. The water will fill the working chamber, the water level above the sieve will drop and the bed will be sealed.

When the power cylinder porsche 28 is placed in the lower position, the control device will simultaneously give instructions to close the air outlet from chamber 11 and open the compressed air inlet to this chamber. The first command goes to spool 8, and the second goes to spool 7, which execute them simultaneously. The spool 8 lets in compressed air under the piston 28, and the spool 7 connects the chamber above the piston 28 to the atmosphere. The piston 28 moves upward under the pressure differential, and the piston 15 of the valve follows it, closing it. When piston 28 reaches its middle position, valve (5) closes. Passing to the middle position, the piston 28 begins to open the intake valve 14. Thus, when simultaneously giving commands to close one valve and open another valve, these commands are executed sequentially — first one valve is closed, and then another valve opens and ejects compressed air into the atmosphere does not occur.

If a command is given to the control of the machine to open both valves, then this command is not specified by the air distributor.

it is complete, since in this case the difference in air pressure on the piston 28 of the power cylinder does not vary.

Thus, for any sequence of commands there will be no emissions of compressed air into the atmosphere.

P d e m t m 3 o b r e te p n

Air distributor for pneumatic drive of pistonless jigging machines, comprising a housing with an annular channel, inlet 1 exhaust valves, characterized in that, in order to prevent compressed air emissions into the atmosphere, the air distributor is equipped with three pneumatic cylinders arranged one above another, with the upper cylinder connected to the inlet valve, the lower piston has an outlet, and the middle pneumatic cylinder stem is double-sided to act on the pistons of the upper and lower cylinders.

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