RU1801547C - Apparatus automatic elutriating of clayey component - Google Patents

Abstract

Usage: foundry, construction and other industries where separation of the material into fractions by the sedimentation method is required. SUMMARY OF THE INVENTION: the device comprises a vessel, siphon tube, level switch, time switch and filling and drain valves connected to a siphon tube, level switch and time switch, meter-comparator of filling and drain time intervals and an alarm, the input of the meter-comparator being connected to the output is a level switch and a time relay, and the output is with fill and drain valves and an alarm. 1 ill.

Description

The invention relates to foundry and can be used to determine the clay component of foundry sands and mixtures.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a schematic diagram of a device.

The device comprises a vessel 1, a siphon tube 2, with a suction hole located at a predetermined height from the bottom of the vessel 1, a level 3 relay, with electrodes 4, 5 of the upper and lower levels of the time relay 6, a filling valve 7, a drain valve 8, a comparator meter 9 filling and draining time intervals, alarm 10, pressure filter 11, drain filter 12.

The siphon tube 2 is located in the vessel 1 and connected to the filling and discharge valves 7, 8 through the drain filter 12. The electrodes 4, 5 of the upper and lower levels are also placed in the vessel 1 and connected to the level 3 relay, which is connected to the time relay 6

and a comparator 9 time intervals for filling and draining. The time relay 6 is connected to the comparator 9 and valves 7 and 8. The comparator 9 is connected to the alarm 10 and valves 7 and 8. The filling valve 7 is connected to the water supply network through the pressure filter 11. The drain valve 8 is connected to the valve 7 filling and drain line,

The device operates as follows.

A vessel 1 with a pre-prepared breakaway sand sample or mixture is installed in the device. The level 3 relay, through the time relay 6, gives a signal to activate the filling valve 7. The same signal triggers the comparator 9, which starts measuring the time interval for filling the vessel 1. Water from the network through the pressure filter 11. Pressure valve 7, drain filter 12 and siphon tube 2 enters the vessel 1. mixing it with00

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held, washing particles of clay from sand and swirling particles of clay.

When the level of suspension in the vessel 1 reaches the upper level electrode 4, the level relay 3 is activated and generates a signal that will turn off the filling valve 7. At the same time, the measurement of the filling time by the comparator meter 9 stops. If the measured time is less than the specified maximum permissible value, then the input signals from the meter-comparator 9 do not receive the blocking signals of the valves 7 and 8 of the activation of the indicator 10, i.e. the device will continue to operate in automatic mode. If clogged pressure filter 11, jammed pressure valve 7 or pressure drop in the supply pipe, i.e. the filling time of the vessel 1 to the level of the upper electrode 4 will increase and exceed the specified maximum permissible value, then at the output of the meter-comparator 9 the blocking signals of valves 7 and 8 are on, valves 7 and 8 are turned off, and at the same time the signaling device 10 is turned on. Automatic operation of ycTpoucfea is interrupted, the attention of the laboratory assistant will be attracted to the failed device.

In the absence of failures, i.e. while continuing the automatic mode of operation of the device, the time relay switches on, the suspension settling process begins, in which large particles (sand) settle to the bottom of vessel 1, and small fractions (clay) do not have time to settle on the settling time. After practicing a predetermined settling time, the time relay 6 turns on the drain valve 8. The comparator 9 measures the drainage time in the same way as described above and responds to a possible failure due to clogging of the filter 12 or jamming of the valve 8. Due to the siphon effect, water is drained with particles of suspended clay from the vessel 1.

At the time when the water level in the vessel 1 drops below the electrode 5, the level relay 3 will operate and give a signal that will turn off the drain valve 8 and turn on the filling valve 7, i.e. the work cycle will be repeated until the clay is completely wound off, i.e. until the moment when the water in the vessel 1 becomes transparent. This ends the clay loosening cycle, which

the mixture or sand is completely removed from the test sample. The precipitate is dried and weighed.

Compared with the prototype, by introducing into the device of the meter-comparator filling and draining time intervals and a signaling device and their interaction with the level switch, time switch, and filling and draining valves, it is possible to detect device failures due to clogged filters, jamming of valves and pressure drop in the water supply network and eliminating the influence of these failures on the operability and reliability of the device and on the reliability of the determination results

clay content.

Associated effect is achieved by reducing operating costs, because filter cleaning in the inventive device is carried out by signal only in case of failures. . Servicing filters with a predetermined frequency in this case is excluded.

thirty

Claims (1)

The claims A device for automatically eluting clay component, comprising a vessel for foundry sand or mixture to be elutriated, a siphon tube with a suction hole located in the vessel at a predetermined height from its bottom, a level switch with an electrode system, a time relay, and filling and drain valves connected with siphon tube relay level and time relay, characterized in that, in order to increase the reliability of the device, it further comprises a meter-comparator of the filling and discharge time intervals and a signaling device, at the input of the meter-comparator is connected to the output of the level switch and the time relay, and the output of the meter-comparator is connected to the fill and drain valves and the alarm. ZaZame. extremely f $ omission. aene $ about times