SU732005A1 - Valve-type air distribution arrangement for piston-less jigging machine - Google Patents

Description

This invention relates to mineral processing and can be used to create an oscillatory process with a pistonless jigging machine. A valve-type air distribution device is known, comprising a housing, a drive shaft, valve stems, Cams 1. A disadvantage of the known device is the low productivity and considerable dimensions and weight of the device. The closest to the invention in terms of technical importance and the result achieved is an air distribution device that includes a housing, nozzles for supplying air, elastic valves mounted on the rods 2. The disadvantage of this device is its low efficiency and low velocity of the valve when opening openings in the housing . The purpose of the invention is to simplify the design and reduce the dimensions of the valve air distributor. The goal is achieved due to the fact that the housing is equipped with two chambers installed with gaps between them, in which windows are made and rods are provided, equipped with additional valves and cam mechanisms, additional valves can be located above the upper window of the chamber. FIG. 1 shows the proposed air distributor, general view; in fig. 2 - section A-A of FIG. 1. The inlet 2 and exhaust 3 chambers as well as the T-channel bypass 4 are formed in the housing 1 of the valve air distributor with the help of partitions 4. Compressed air from the receiver enters the inlet chamber 2 through the “a” window, and “ b it is removed to the atmosphere. The chambers have two holes each, which are closed by valves. In the upper plate of the housing 1, the rod 5 is moved in the guide with two elastic valves 6 fixed at some distance from one another, one of which, an additional one, is located above the upper window of the chamber. The rod 5, in turn, through the lid-load 7 is fastened to an additional valve (air tube 8), which is tightly fixed above the upper window of the chamber.

By means of the control system, the compressed air enters the pneumocylinder and is discharged into the atmosphere through the duct 9 present in the housing.

Valve diffuser works as follows.

When there is no overpressure in the air bellows, the valves with the brush are in the lower position and with the help of a cargo load 7 tightly close the flow areas in chambers 2 and 3 of housing 1. When compressed air is fed from the control system to the air hose 8 of camera 1, the valve 5 moves with valves 6 upwards and, consequently, opening flow areas. The compressed air from the receiver flows through the sections opened by the valves into the air jigging chamber — an upward flow of water occurs. At the same time, air flows through the upper opening of the chamber through the bypass T-shaped channel 4. Then, according to a predetermined program from the control system, the air from the cylinder 8 is released to the atmosphere and the valves close the flow sections under the action of a lid load 7 — air enters the air chamber is terminated. After that, compressed air is supplied to the air chamber of the chamber 3 and the stem with the valves, opening the flow sections, allows air to escape from the air chamber through the air duct - a descending flow of water occurs in the jigging compartment. Air is also escaping through the upper passage orifice through the bypass channel 4.

Venting the air from the pneumatic bulb through the control system to the atmosphere allows the valve with a valve to close the openings. The cycle is then repeated at a specific frequency per minute, which is set by the control system and may vary within wide limits.

The amount of air entering the air chamber can be adjusted by changing the stroke of the valve stem. The change in stroke is accomplished by a stop made in the form of a profiled cam 10 planted on the axle 11. The cam position is fixed by means of a clamp 12. Due to two valves fixed on the stem with a certain distance from each other and located above the chamber inlet openings, also, the bypass channel 4 provides for mutual balancing of forces on the brush resulting from pressure drops on the surface of the valves. Thus, there is no extra effort on the brush, regardless of the diameter of the valve,

and all the force developed by the airbag is only used to overcome the total weight of the rod 5 with two valves 6 and the load cover 7.

In addition, the presence of two valves on

the rod allows the creation of pneumatic drives with large flow areas, small in size and weight, with low air flow to move the stem up at its overpressure, similar to the pressure used to create water pulsations in the jigging compartment, i.e. no additional source of compressed air is required. of air.

Claims (2)

1. Valve-type air distributor for jawless jigging machines, comprising a housing, air connections, elastic valves mounted on the rods, characterized in that, in order to simplify the design and reduce the dimensions, the housing is equipped with two chambers installed with a gap between them, and in the chambers Windows are made and rods are placed, equipped with additional valves and cam mechanisms. 2. Air distributor according to claim 1, characterized in that the additional valves are located above the upper chamber window. Sources of information 40prints in the consideration 1. Diamonds V. Century. Pneumatic drive piston jigging machines. M., Gosgortehizdat, 1963, p. 99 2. In the same place 100. eight Bosdt / S OSD / ShG (camera and from heartless cameras1 1 jigging machine