RU2242726C2 - Level meter - Google Patents

Abstract

FIELD: measuring engineering.

SUBSTANCE: level meter has electrical drive connected with the casing pipe of a well, signal light, electrical contact, and power source. The electrical drive is mounted in the transparent flexible measuring tube which is secured to the panel. The upper end of the measuring tube is connected with the U-shaped pressure gauge. One bend of the gauge is mounted at the top part of the panel. The other bend is submerged into the water of the casing pipe of a well.

EFFECT: simplified design.

2 dwg

Description

Purpose and scope of the level gauge

The level gauge is designed to measure the water level in the wells, which is necessary in hydrogeology to determine the groundwater reserves and find the optimal mode of operation of the wells.

Analogue level gauge

The prototype of the patented level gauge is an electric level gauge, it contains the following main details: a measured electric wire, an electric circuit circuit breaker (measuring electric device, electric bell, electric lamp), a power source. At the end of the measured electric wire lowered into the well, a metal contact is fixed, and there are digitized marks on the wire to determine the depth of immersion in the well. The second end of the wire is connected to the casing of the well. [1]

The principle of operation of the known electric level gauge is that the electric wire with the contact is lowered into the well to the surface of the water. At the moment of contact of the wire contact with the surface of the water, an electrical circuit is closed, an alarm circuit is activated, for example, an electric lamp lights up. The lowering of the wire is stopped and the depth of the wire is counted according to the digital marks applied to it. Disadvantages of an Electric Level Gauge

An electric level gauge suffers from significant shortcomings in that, firstly, it does not have a pointer to determine the value of the water level at any given time, and secondly, during measurements it is necessary to lower it into the well and then raise the electric wire. These operations lead to weaving and tangling of the electric wire with the pump pipes and the safety cable, as a result of which measurements are extremely difficult or impossible.

The essence of the patented level gauge

The patented level gauge is free from these drawbacks.

It contains (drawing) a panel 1, a liquid U-shaped pressure gauge 2 with a scale 3, an electric wire with pin 4, a power supply 5, a signal lamp 6, an electric switch 7, an electrical outlet 8.

The electric wire 4 is located in a transparent and flexible measuring polyethylene tube 9, which is fixed on the panel 1 and the upper end of which passes into a liquid U-shaped pressure gauge 2 with a scale having 2 elbows, one of which is attached to the upper part of the panel 1, and the other is lowered into the water well casing. The inner diameter of the polyethylene tube 9 is much larger than the diameter of the electric wire 4. The space between them is filled with air, and in the area immersed in water, with water. On a plastic tube 9 indelible paint applied scale, which determines the depth of its immersion in the well.

The electric wire 4 with the end exiting the short elbow of the U-shaped pressure gauge 2 is connected to the casing of the well, and its second end ends with an electrical contact. The electrical and circuit diagram of the level gauge is shown in Fig. 2.

The action of the device is as follows.

When the water level in the well changes, the air pressure in the tube 9 changes to the liquid in the U-shaped pressure gauge 2. When the water level rises, the air pressure increases and the liquid in the short knee of the manometer 2 rises, the opposite happens when the water level in the well decreases. The position of the meniscus of fluid in the short knee is fixed on the scale 3 of the device. Like a thermometer, the level gauge works continuously, provides a visual display of the water level in the well.

The entire electrical circuit of the device, including an electric wire with pin 4, a power supply 5, a signal lamp 6, an electric switch 7 and an electrical outlet 8, is necessary for calibrating the device and periodically checking the accuracy of its readings.

Sources of information

1. Handbook of a hydrogeologist, vol. II, ed. "Subsoil", Leningrad, 1967

Claims (1)

A level gauge containing an electric wire connected to the casing of the well, a signal lamp, an electrical contact and a power source, characterized in that the electric wire is placed in a transparent elastic measuring tube, which is fixed to the panel and the upper end of which passes into a liquid U-shaped pressure gauge with a scale having two elbows, one of which is attached to the upper part of the panel, and the other is lowered into the water of the well casing.

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