RU95064U1 - AUTOMATED SYSTEM FOR DETERMINING AND ELIMINATING GAPES OF WATER PIPES OF PUMPING STATIONS - Google Patents

Abstract

 An automated system for identifying and eliminating breaks in the water lines of pumping stations, containing control points, instrumentation, including flow and pressure sensors installed on each section of the pipeline with shut-off valves for water pipes equipped with electric drives, and an external process data source unit, characterized in that the flow sensors and pressures are set only at the beginning of water conduits, while they are functionally connected through a programmable logic controller with points of local and central dispatch control equipped with workstations, as well as special visual and acoustic signaling devices.

Description

The utility model relates to a water supply system and is intended for automatic detection of integrity violations (gaps) in the water supply of pumping stations during their operation and prompt decision-making on localization and elimination of an emergency.

An analysis of the information shows that currently there are no effective devices for determining gaps in the pipelines of existing pumping stations.

A known system for monitoring the performance of the pipeline (patent RU No. 2351915) to obtain information necessary for managing the risks of rupture of the pipeline. This system implements static and dynamic monitoring of a certain number of special zones of the pipeline to obtain information on the circular expansion of the pipeline material. This system reduces the risk of pipeline rupture. However, it does not allow for the rapid identification and elimination of pipeline rupture in a critical situation.

A known method for detecting leaks before a gap in the pipeline (patent RU No. 2372596), which allows to predict the rupture of the pipeline taking into account the physical wear of its material. However, this technical solution is also not applicable in real critical situations.

As a prototype of the proposed utility model, a device for detecting leaks in main pipelines (patent RU No. 2302584) was selected, using control and measuring equipment for routine monitoring of pipeline tightness and determining leak points in them. This device contains a valve control unit, a pressure sensor, an amplifier-converter, a power source, a computing unit and a transmitter, as well as a point for monitoring the working environment parameters of the monitored pipeline section. However, this device is characterized by the high complexity of the implementation of the instrumentation system and requires the installation of equipment at both ends of the monitored section of the pipeline. In addition, it does not allow automated closure of a faulty water conduit in such a way as to ensure the exclusion of water hammer.

The proposed automated system for determining the gap of the conduit (ACS) in the water supply system (figure 1) includes the following elements:

pumping station of the second rise (NS) - 1;

collector - 2;

water conduit No. 1-3;

water conduit No. 2-4;

water conduit No. 3-5:

programmable logic controller (PLC) - 6;

automated workstation (AWS) at the local dispatch center (TIR) of the National Assembly - 7;

Workstation of the dispatcher in the Central Dispatch Department (CDU) - 8;

flow sensor (FE) on the water pipe No. 1-9;

pressure sensor (PE) on the water pipe No. 1-10;

shut-off valve of water conduit No. 1-11;

electric drive (GC) of the shut-off valve of the water conduit No. 1-12;

flow sensor (FE) on the water pipe No. 2-13;

pressure sensor (PE) on the water conduit No. 2-14;

shut-off valve of water conduit No. 2-15;

electric drive (GC) of the shut-off valve of the water conduit No. 2-16;

flow sensor (FE) on the water pipe No. 3-17;

pressure sensor (PE) on the water pipe No. 3-18;

shut-off (GC) gate valve No. 3-19;

electric shut-off valve for water conduit No. 3-20;

block of external sources of technological data - 21;

regulating water supply unit (RVU) - 22;

pumping station of the third rise - 23;

block distribution network of water supply (RSPV) - 24.

The work of ASOR is as follows.

The functioning of the system is based on the control of flow and pressure on water conduits (3, 4 and 5). A water pipe rupture is diagnosed when changes in flow rate and pressure are detected by the set values and for the set time. The values of permissible fluctuations in the values of flow and pressure on the water conduits, as well as the permissible speed of these changes, are determined at the stage of preparation for operation and adjustment of the system. At the same time, the influence of throttling by shut-off and control valves from the side of the NS (1) on the detection of a water supply gap is excluded.

To control and generate an alarm signal about a break in the water conduit, measuring instruments are used: flow control (sensors 9, 13 and 17) and pressure (sensors 10, 14 and 18). In this case, flow and pressure sensors are installed in the chambers only at the beginning of the water conduits. The data of the measuring devices are processed in the PLC (6).

To take measures to eliminate the malfunction, information about a possible breakdown of the water conduit is automatically transmitted from the PLC (6) to the workstation of the shift engineer in the TIR NS (7) and to the central control center (8) via the communication channel using the automated dispatch control and water supply control system (ASKVU). The attention of the dispatcher is drawn visually and acoustically using special signaling devices (not shown conditionally in Fig. 1). Due to the fact that a significant number of consumers can be fed from the water main and the mode of its operation directly affects the technological process of the objects connected to the water main, the decision on the composition of the subsequent actions to localize the gap is made by the operator based on the external technological data of the block (21) about related objects ( 22, 23 or 24), also entering ASDKUV.

If the conduit feeds directly to the RSPV (24), then the dispatcher automatically, remotely or manually closes the faulty conduit (5) by closing the corresponding shut-off valve (19) using the electric actuator (20) or locally.

If the pump station of the third lift (23) is connected in series with the water conduit, then in order to avoid water hammer and disrupt normal operation of the pump units (ON), together with the closing of the faulty water conduit (4), the pressure valve of the third lift is closed at the pump station of the third lift, stop the closing the valve at the entrance of ON.

If RVU (22) is connected in series to the water conduit, then in order to avoid water hammer, disruption of the normal operating conditions of the ON and overflows of drinking water tanks (RPV, not shown conditionally in Fig. 1), together with the closing of the faulty conduit (3), the pressure head is closed on the RVU ON valves, ON stop, closing the valves on the inlet of the ON, as well as closing the RPV inlet valves.

The proposed automated system allows you to make decisions on the composition of further actions to localize the malfunction depending on the type of technological object connected to the water main, as well as to exclude the possibility of hydraulic shocks, violation of normal operating conditions of pumping units and overfilling of drinking water tanks.

Claims (1)

An automated system for identifying and eliminating breaks in the water lines of pumping stations, containing control points, instrumentation, including flow and pressure sensors installed on each section of the pipeline with shut-off valves for water pipes equipped with electric drives, and an external process data source unit, characterized in that the flow sensors and pressures are set only at the beginning of water conduits, while they are functionally connected through a programmable logic controller with local and central control centers equipped with workstations, as well as special visual and acoustic signaling devices.