SU870580A1 - Device for regulating water level of irrigation system tubular water outlets - Google Patents

Description

(54) DEVICE FOR REGULATING WATER LEVEL

TUBULAR WATER EXTRACTIONS OF IRRIGATION SYSTEMS

one

The invention relates to the field of agriculture, namely to devices that are used on irrigation canals of rice systems of gravity distribution, in their automation.

A device for regulating the water level of tubular outlets of irrigation systems is known, comprising a water line, a shutter located on a cylindrical water outlet and made in the form of a movable tip with a float chamber fixed on it, a branch pipe for communication with the atmosphere, the inlet and outlet ports of different sections of which are the last it is connected by a pipeline with a float valve, laid in the regulated pool Til.

The disadvantage of this device is in-. Its reliability is low, control accuracy is low in the range of small hydraulic differences.

The purpose of the invention is to increase the reliability and extend the range of water level control.

This is achieved by the fact that in a device for adjusting the water level of a tubular outflow of irrigation systems, including a water conduit, a shutter, located on a cylindrical outlet, and filled in the form of a movable head with a fixed head

To it, a float chamber having a nozzle for communication with the atmosphere, inlet and outlet openings of different sections, of which the latter is connected by pipeline to the float

ts by a valve located in the regulated side, a fixed diaphragm with an elastic toroidal seal along the contour is fixed on the water outlet, and the movable head is fitted with

20 a support pad located above the diaphragm that is directly connected to the float chamber,. with this, there are stops on the movable tip, limiting its crown movement.

The drawing shows a diagram of the device for adjusting the level of iodine.

The device consists of a shutter having a float chamber 1 provided with openings 2 and 3 for inlet and outlet of water, a nozzle 4 connecting the chamber with the atmosphere. A pipe 5 with a float valve 6 is located at the opening 3 and is located in the regulated pool 7. The valve also includes a movable head 8 inside which there is a non-moving diaphragm 9 with an elastic spiral seal 10 along the contour. The movable head 8 is provided with a support 11 located above the fixed diaphragm 9 and is kinematically associated with the latter by means of upper and lower stops 12 and 13, which are adapted to restrict its vertical movement. The shutter is mounted on a cylindrical vodovtusk 14. The device operates as follows.

When the water level in the regulated pool 7 rises, the float valve 6 closes the outlet of the pipe 5 and the water fills the chamber 1 through the inlet from the gap 2 to the chamber 1. The chamber loses buoyancy and goes down. The annular support platform 11, which is rigidly connected with the help of a tg, does not prevent the movable head 8 from freely moving downwards before lowering it onto the outlet 14 and blocking the opening of the conduit. In this case, water can enter the opening of the water outlet 4 only through a large annular gap between the fixed diaphragm 9, the seal 10 and the movable tip 8,

Upon further lowering of the float chamber 1, the annular support platform 11 deforms the seal shell 10, which comes into contact with the lowered movable head 8.

In this way, the opening of the outlet of the outlet 14 is completely closed.

When the water level drops in the regulated pool 7, the float valve 6 opens the outlet 3 and the water from the chamber flows into the regulation No. 1 bay, since the cross section of the hole 3 is much larger than the section of the hole 2, the chamber gains buoyancy and floats. The annular support platform 11 first releases the seal shell 10 and the water has the opportunity to enter the outlet 14 through the annular gap formed. Upon further ascent of the camera 1, the annular support platform 11 enters in contact with the stop 12 of the movable head 8, raising it. The limitation of the position of the movable head upwards is carried out by the abutment 13 resting against the diaphragm 9. The heads 13 have the possibility of shifting along the movable head.

When the water level in the regulated pool 7 rises, the cycle of operation repeats.

Such an adjustment of the regulating device ensures its operation with small (10-30 cm) hydraulic drops, it provides a standardized flow depending on the requirements of irrigation equipment and the technology of cultivation of agricultural crops due to the possibility of setting the required lifting height of the movable tip with high precision control from fluctuations in the upstream.

Claims (1)

1. USSR author's certificate No. 441387, cl. Е 02 В 13/02, 25.02.72 (prototype).