SU114505A1 - Device for automatic control of washing of high-speed filters of water treatment plants - Google Patents

Description

Devices for automatically controlling the flushing of high-speed filters of water treatment plants operating under pressure in a water supply network using a distribution valve and a float relay that moves an I1 impulse to turn on a servomotor, are moved by a hydraulic servo motor. In such devices, in the course of their operation, there is a lag in the opening of BCii types, which leads to system triggering errors.

The described device does not have the indicated drawbacks, it eliminates errors in the operation of the system and provides a more complete washing of the filter by delaying the transfer spool to the position of the initial washing time for some time after the pulse.

For this purpose, the slider of the servo servomotor is connected to the rolling pin of the distribution valve through a link freely suspended on it, in the form of a frame, which allows the rod to move freely until it contacts the rolling pin in the forward and reverse directions.

The hydraulic cylinder of the raw water inlet valve has in the wall connected to the cylinders of the hydraulic actuators of the flush water inlet and drain valves, an overflow channel that opens at the end of the valve's closing stroke, and throttling devices are installed on the pipelines for the opening sequence of valves, for example, valves.

The drawing shows a diagram of an apparatus for automatically controlling the washing of high-speed filters of water treatment plants.

The filter cleaning system 1 is controlled by a distribution valve 5 moved by a piston servo motor 2, the rolling pin of which is connected to the engine shaft by means of a link 4 in the form of a frame, which is freely suspended on a rolling pin. This link allows the rod to move freely until it contacts the rolling pin in both forward and reverse directions.

No. 114505-2 -

The impulse for starting and ending washing is supplied from the float switch 5 of the head loss, which turns the servomotor 2 on and off with the help of the auxiliary spool 6 depending on the change in the loss of nano in the filter. The channels in the spool of the spool are connected to hydraulic cylinders 7, 8, 9 10 valves supplying wastewater, wash water and raw water, as well as filtrate, respectively.

In addition to the above mentioned hydrocyles, a buffer cylinder 11 is provided in the system for transferring water from the hydraulic cylinder 9 into the system. When closing the valve from the hydraulic cylinder 9, the water can be bypassed directly to pipeline 12 (in the drawing this pipeline is shown by a dotted line). If such a pipeline is used, there is no need for a buffer cylinder.

The distribution valve 3 is designed to communicate pressure line 13 with the cylinders 7, 8 and 9 of the hydraulic actuators of the valves.

To ensure that the hydraulic cylinders 7 and 5 are actuated by opening the drain valves and flushing water after running in the hydraulic cylinder to close the raw water inlet valve, an overflow channel M is provided in the wall of this hydraulic cylinder through which through the valve J5 the water enters the cylinders 7 and 8 of the hydraulic actuator zadvil ; The necessary sequence for opening the drain valves of the washing and raw water is achieved with the help of throttling devices installed on the pipelines, which can be used as standard valves 16, 17 and 18, open wired when setting up the device to the desired value.

The operation of the filter washing system proceeds as follows.

When the loss of the ionizer increases to a critical value, due to clogging of the filter, the float relay 5 pulls the auxiliary spool b into the lower half and the water from the pressure line enters the upper part of the hydraulic cylinder 9, the bite of which goes to the lower position due to water pressure, causing closing the valve.

By discontinuing in this connection the supply of raw water to the filter, the spool 6 transfers water to the hydraulic cylinder 10 and the filtrate valve closes. During the course of the hydraulic cylinder 9 downwardly, water from this cylinder is forced into the buffer cylinder 11, its free piston is lifted, which displaces the water above it through the pipeline into the drain through the discharge valve 19 of the spool 3. With the lower position of the hydraulic cylinder 9 water from the discharge valve the line rushes through channel 14 and non-return valve / 5 through line 20 to the hydraulic cylinders 7 and 5 of the drain and wash water valves. When setting up the system, the throttling valves 16 and 17 are set to varying degrees of opening, and the valve 17 is opened by a large amount. Due to this, the drain valve of the wash water opens first from the hydraulic cylinder 7, and after it the valve of the washing water from the hydraulic cylinder 8 opens.

After washing the filter, the pressure under its drainage is restored and the float of relay 5 rises, moving the valve 6. In this connection, the piston of the servomotor 2 begins to move upwards and, choosing the gap in the free link 4, moves the valve 3 to the upper limit position, under which the pressure of the water from the pressure line closes the valves: first, controlled by hydraulic cylinder 8, then hydraulic cylinder 7. After closing these valves, the raw water inlet valve, controlled by hydraulic cylinder 9, opens and the filter is filled with water of normal levels supported by a float regulator 21.

Subject invention

Claims (2)

1. A device for automatic control of the flushing of high-speed filters of water treatment plants, operating under the influence of a pressure pipe in a water supply network, consisting of a spool valve moved by a hydraulic servo motor, communicating a pressure line to the valves of the hydraulic actuators through which the flushing, waste and raw water is supplied, and connected by a pipeline with a sub-drain; the filter space of the float relay, giving impulse to turn on the distribution valve actuator, It is distinguished by the fact that, in order to eliminate the faults in the system response and to provide a more complete filter flushing by delaying the distribution spool to the end of flushing for some time after the impulse, the piston servomotor rod is connected to the rolling pin of the distribution spool through a link on the link a frame allowing the shaft to move freely until it contacts the rolling pin in both the forward and reverse directions. 2. The form of the device according to claim 1, characterized in that, in order to open the drain valves and the washing water after closing the raw water inlet valves, the hydraulic cylinder of this valve has in the wall communicated with the cylinders of the hydraulic valves of the washing water inlet and the drain, the bypass a channel that opens at the end of the stroke to close the valve, and throttling devices, for example, valves, are installed on the pipelines for the sequence of opening the valves.