SU1251953A1 - Valve pulser for air and pulsating jigger - Google Patents

Description

The invention relates to the enrichment of minerals, mainly for the creation of an oscillatory process in air-pulsating jigging machines for the enrichment of small classes of coal and ores.

The purpose of the invention is to increase the efficiency of the enrichment of small coals and ores by reducing the response time of the valves,

The drawing shows a diagram of the valve pulsator section.

The valve pulsator consists of a housing 1, divided by a partition into inlet 2 and outlet 3 chambers, inside of which elastic pneumatic air bellows 4 are fixed by upper split planes.

Valves 5 are fastened directly to the lower detachable planes of the pneumatic obflats 4. Inside the pneumobalons are located in the loose loose state of the insert 6, made of a lightweight material, such as plastic. The shape of the inserts 6 repeats the shape of the internal cavities of the air bellows 4.

For free communication of the upper and lower parts of the inner cavity of the pneumatic air tube 4, separated by an insert 6, holes 7 are made along the axis of the inserts 6.

Valve pulsator works as follows.

In the absence of overpressure of the air from the control system in the air bladder 4 located in the inlet chamber 2, the valve 5 is in a raised state. At this point in time, the air bladder 4 in the discharge chamber 3 is under pressure and the valve 5 blocks the passage opening in the exhaust chamber 3 .

Compressed air from the receiver of the jigging machine through the valve 5 open through the valve in the inlet chamber 2 enters the air chamber of the jigging machine, displaces water from it — water rises and the bed of the jigging machine is loosened.

Then, from the control system, the compressed air is supplied to the pneumatic tube 4, located in the inlet chamber 2, which, swelling together with valve 5, moves and closes

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the inlet of the inlet chamber 2. The compressed air enters first into the upper part of the internal cavity of the pneumatic air tube 4, and then through the hole 7 in the insert 6 and into the lower part of the cavity. Since the insert 6 is not fixed in the cavity of the pneumatic air tube 4, but lies in it freely, the compressed air enters the lower part of the cavity also through the resulting leaky fit.

The response time of the valve 5 to the closure is the time of filling the internal volume of the compressed air cylinder 4 with air, and the presence of the insert 6 reduces the amount of compressed air needed by the volume of the insert and reduces the valve opening time 5. In addition, directly without rods or other transmitting devices fastening the valve 5 to the lower separable plane of the air bellows 4 reduces the inertial mass of the moving parts, which also reduces the time it takes to work.

The valve 5 is lowered and closes the passage opening in the inlet chamber 2, the compressed air from the receiver ceases to flow into the jigging machine.

The control system then connects the internal cavity of the pneumatic cylinder 4 located in the exhaust chamber 3 with the atmosphere and compressed air is removed from it, the pneumatic balloon 4 is compressed due to its own elasticity, the valve 5 rises and opens the orifice in the exhaust chamber 3. The response time of the valve 5 on the opening is proportional to the number of compressed air in the air bladder 4 and the inertial mass of the moving parts. Therefore, the presence of the insert 6 and the brushless mounting of the valve 5 to the air bladder 4 also shortens the response time. Facilitates the release of compressed air from the air bellows 4 to the free, non-fixed position of the insert 6, since in addition to the air outlet through the opening 7, the air can flow through the leaks of the insert 6 against the surface of the air bellows.

When the passage opening in the outflow chamber 3 is open, the air from the air chamber of the jigging machine of vy312519534

goes into the atmosphere - there is a descend with a frequency set by means of the sys- tems. Then the cycle repeats, control topics.

Claims (1)

VALVE PULSATOR OF THE AIR-PULSATION Jigging Machine, comprising a housing with an inlet and outlet chambers and elastic pneumatic cylinders with valves fixed to them, characterized in that, in order to increase the efficiency of enrichment of small classes of coal and ores by reducing the valve response time, inside the pneumatic cylinders concentrically with he placed curly inserts, each of which is made with a Central hole. Che System air 6 1 controls S-U 1251953 A1