Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020107081 - SELF-POWERED DATA LOGGER FOR WATER SUPPLY AND SEWERAGE SYSTEMS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

SELF-POWERED DATA LOGGER FOR WATER SUPPLY AND

SEWERAGE SYSTEMS

FIELD OF THE INVENTION

The present invention relates to an energy-independent logger, which willĀ· be use in the field of water supply and sewerage systems and facilities, and in particular for monitoring mains and sewerage networks.

BACKGROUND TO THE INVENTION

The water supply of settlements, industrial and agricultural sites is realized by existing water supply system. It is a set of engineering facilities that produce, purify, transport and delivers to the consumers the necessary water quantities. Water abstraction sources are springs, underground waters, rivers, dams, lakes and seawater after desalination. The natural water extracted from these sources contains some impurities, which are removed before it reaches the end user.

The modem water supply system needs more effective monitoring and management with the increase in production costs for the supply of drinking, industrial and irrigation water to the end-user and its growing importance as an asset. Leakages in the water supply system are among the main causes of huge water losses across the mains water supply. In addition to losing large amounts of water, the presence of leaks in the system can also lead to contamination of water in mains water supply, to cause damage to buildings and facilities, and so on. Continuous mains network monitoring is required to both detect leaks in a timely manner and reduce water losses and to regulate pressure and prevent accidents in worn-out water supply and sewerage networks.

Acoustic or correlation units most commonly used in the practice of detecting leakage and failures in mains network. The well-known data collection units as data loggers need batteries and have the complex implementation.

U.S. Patent No. WO/1996/022508, published on 25.07.1996, relates to a wheel mounted data logger. The document discloses an acoustic sensor that is excited by the noise produced by the running engine of a vehicle or machine and a travelled distance internal sensor. Both sensors are connected to a microcontroller and are all housed together with a power battery in a single smal l box as to create a unit capable of recording in its internal memory the status of the engine, the distance travelled and the top speed developed for each one of the programmed periods of time.

U.S. Patent No. 20170350100, published on 07.12.2017, relates to an intelligent standpipe for drawing water from a mains water supply. The standpipe includes an inlet having a first coupling configured to enable the standpipe to be connected to a hydrant outlet of the mains water supply and an outlet having a second coupling configured to enable a water delivery hose to be connected to the standpipe. A flow meter measures a volume of water flowing from the inlet to the outlet and a data logger is connected to the flow meter and records the volume of water measured. The GPS module determines the location of the standpipe when the flow meter detects the water flow and a wireless communication module transmits the recorded volume of water and corresponding GPS location to a central monitoring facility.

There is no known energy-independent logger with autonomous power supply and real time monitoring of key indicators of the mains water supply.

SUMMARY OF THE INVENTION

An object of the invention is to provide an energy-independent logger with an autonomous power supply and for real-time monitoring of physical, chemical and other indicators of the mains water supply.

The problem is solved by providing the energy-independent logger comprising a reversible axial turbine coupled directly to the shaft of alternating current generator all mounted together in a tubular metal housing. The alternating current generator is attached by ribs to the inside of the tubular metal housing with an opening being provided in one of the ribs and respectively in the metal housing, through which the cables of the alternating current generator pass through to a regulator. The regulator is connected to a rechargeable battery to power a telemeter with a built-in 3G modem. The regulator, the battery, and telemeter are housed in a second housing attached to the tubular metal housing.

According to the invention, the regulator includes a rectifier unit of three-phase alternating voltage of the alternating current generator and an electronic charge regulator of the battery.

An advantage of the provided energy-independent logger is that the specially designed built-in low pressure drop reversible turbine will produce electrical energy in amount needed to supply a combination of water, pressure, and level measuring instruments and thanks to the low head losses will not hinder the normal operation of the water supply system. In addition, the logger allows remote measurement, control and balancing of the water cycle.

Brief description of the drawings

The present invention is shown in the enclosed Figure 1, which is a schematic diagram of an energy-independent logger.

Description of preferred embodiments

The provided energy-independent logger, shown in Figure 1 , includes a reversible axial turbine 1 coupled directly to shaft 2 of an alternating current generator 3 all mounted together in a tubular metal housing 6. The tubular metal housing 6 is made of welded flanges, cones and tubular elements with a mechanically machined slot for mounting the generator 3. The reversible axial turbine 1 has a low efficiency and processes a small part of the water flow energy, and the turbine 1 being able to work with a water flow in both directions of the tubular housing 6. Actuating elements of the axial turbine 1 are propellers fixed to a hub. The outer diameter of the propeller is 0.5-2 mm smaller than the diameter of the tubular metal housing 6 in which the turbine 1 is mounted. The hub of reversible axial turbine 1 is coupled directly to the shaft 2 of the generator 3 and it is the operating device providing a rotary motion to generate an electric current by the generator 3. The shaft 2 is made of metal and imparts the rotary motion from the turbine 1 to the rotor of the generator 3. The alternating current generator 3 has permanent magnets, an encapsulated rotor and a wound stator. The rotor of the generator 3 is mounted on rolling bearings working in an aqueous medium. The aim of the design is to

ensure the tightness of the windings of the generator 3 without the need to install seals. The alternating current generator 3 is attached by ribs to the inside of the tubular metal casing 6 with an opening being provided in one of the ribs and the metal housing 6 respectively, through which the cables of the alternating current generator 3 pass through to the regulator 4. The cables from the terminals of the generator 3 are hermetically sealed.

The regulator 4 is connected to a rechargeable battery 5 for powering a telemeter 8 with a built-in 3G modem. The regulator 4, the battery 5 and the telemeter 8 are housed in a second housing 7 attached to the tubular metal housing 6. The regulator 4 includes a rectifier unit of three-phase alternating voltage of the generator 3 and an electronic charge regulator of the battery 5 for supplying an additional consumer. The electronic charge regulator provides visual information by LEDs on the status of the alternating current generator 3. The rechargeable battery 5 accumulates and releases the generated energy by the generator 3 to provide a continuous and stable supply to the connected consumers, including during periods in which there is no water flow in the pipeline or in metal tube casing 6, respectively. The second housing 7 is attached to the tubular housing 6 and thus constitute together a complete unit. The telemeter 8 with a built-in 3G modem is equipped with digital and analog inputs and is designed to record data for different indicators at the point of installation of the energy-independent logger.

For example, the measured indicators are:

water quantity via a connection to a measuring device - water meter, flow meter with pulse output;

pressure - via a connection to a transmitter with 4-20mA output; water quality - through various transmitters with 4-20mA output.

Operating principle of the provided energy-independent logger.

The reversible axial turbine 1 and its accessories for propulsion and conversion of the kinetic energy of the water into electrical, by virtue of the most simplified and reliable design, provide a continuous and independent power supply of the telemeter 8 and other meters on the mains water supply, which are power consumers up to 25 W. The operating principle is similar to the principle of Kaplan or Bulb turbines in hydropower plants but differs from them in that the leading indicator here is the generation of a minimum pressure drop. The efficiency ratio of the turbine 1 is deliberately low, allowing it fully operate when changing the water direction as well as in a wide range of water quantities.

The reversible axial turbine 1 is coupled to the shaft 2 of the alternating current generator 3. The generator 3 includes a rotor with permanent magnets and a wound stator in a water impermeable tubular metal housing 6. The generator 3 charges the battery 5 through the regulator 4.

The main consumer of energy produced by the reversible axial turbine 1 is the telemeter 8 with a built-in 3G modem. The telemeter 8 collects data from various measuring devices powered by the battery 5 through the regulator 4 by the reversible axial turbine 1. Thanks to the built-in 3G modem with the corresponding SIM card and the continuous power supply, the telemeter 8 will send real-time data to a web based application for visualizing and managing measurement data.