SU820745A1 - Device for determining watering rates for agricultural crops - Google Patents

Description

one

The invention relates to amelioration, namely, devices for determining the irrigation rates of agricultural crops with subsurface moisture.

A device for determining irrigation-rates, agricultural crops is known, including a Mariotte vessel connected by a supply pipe equipped with a funnel, with a drain section limited by plug 1.

Its disadvantage is the complexity of operation.

The purpose of the invention is to simplify operation.

This goal is achieved by the fact that the end section of the supply pipe is perforated and placed inside the drain section bounded by the plugs, the latter being made in the form of annular elastic shutters, worn on the supply pipe and connected to the source of compressed air.

FIG. 1 given device assembly, general view; in fig. 2 and 3 show the water supply pipe, cross sections.

The device is mounted on the drain 1, bred into the channel 2 and includes a graduated vessel Mariotta 3, a feed pipe 4, a receiving funnel 5, a perforated pipe section 6, a drain section 7, marked with plugs made in the form of hollow elastic shutters 8 and 4 attached to the feed pipe 9, a tube 10 connecting the cavities of the obturators with an external source of compressed air (not shown, for example, a bicycle pump), a polyethylene tube 11 for measuring the pressure at the end of the drain section 7, pressure gauge 12.

The device works as follows.

In assembled form (Fig. 1), the supply pipe 4 is introduced into the drain 1, air is supplied through the tube 10 into the obturators 8 and 9 (for example, with a bicycle pump) until the drains 7 are tightly closed; from the vessel Mariotte 3, through the funnel 5, water is supplied to the pipe 4, which flows from the latter through the perforated section 6 into the soil. The pressure at the end of section 7 is measured by the pressure gauge 12 with the help of pipe 11. It is maintained by the vessel Mariotte 3, according to the calibration of which

Claims (1)

Claim A device for determining irrigation norms of crops, including a Marriott vessel connected by a supply pipe equipped with a funnel, with a drain section limited by plugs, characterized in that, in order to simplify operation, the end section of the feed pipe is perforated and placed inside the drain section, limited by plugs moreover, the latter are made in the form of annular elastic obturators, worn on the supply pipe and connected to a source of compressed air.