SU540008A1 - Device for adjusting the level of water in the downstream - Google Patents

Description

The invention relates to agriculture, namely to devices having a use on the irrigation canals of rice systems for automatically controlling the water level in rice paddies.

There are known devices for adjusting the level of water in paddy checks, one of which, for example, contains a housing located on the supply line and a movable valve in the form of an inverted cup, moving inside the housing, which is provided with an overflow channel with a float valve at the outlet 1.

This device is not sufficiently reliable in operation due to the large number of kinematic connections of the float actuator and the possibility of jamming of a movable valve - a glass with floating objects.

Another known device for adjusting the water level contains a housing with a lid located on the inlet pipe and a spring-loaded membrane locking element placed in it, connected through an opening to the upper bump, and a telescopic pipe with a float valve on the end to the lower 2.

In this device for regulating the water level, reliable operation is not ensured with small differences, as part of the differential is not productively spent on

overcoming the force of the spring of the membrane locking element and thereby limits the use of the device. The aim of the invention is to increase

range of difference in water levels in pools.

This is achieved in that in the proposed

device housing is divided by horizontal

partition with two holes mi different

diameter in two chambers, and its lid is made in the form of a membrane with a valve that covers the opening of the partition of a larger diameter.

It is advisable at the same time that the hole, which communicates the hull to the headwater, is

equipped with a check valve.

The drawing shows the proposed device, a General view.

The device contains a vertical water outlet 1 with a shutter located in the housing 2 and made in the form of a membrane 3 with an opening 4, connecting the supramembrane cavity with a water outlet 1. The opening 4 has a non-return valve 5. The housing 2 is divided by a horizontal partition 6 with two openings of different diameter: one a hole 7 of a larger diameter and one hole 8 of a smaller diameter so that two chambers form the lower chamber 9 and the upper chamber 10.

The upper chamber 10 communicates with the lower

by the pool and the atmosphere with the help of the telescopic tube 11, the installation height of which corresponds to the setting level of the low pool 12.

The cover of the housing 2 is made of polypropylene in the form of a membrane 13, on which on the inner side there is a valve 14 serving to block the opening 7 of the partition 6.

The water from the outlet 1 is fed to the downstream 12 through the outlet 15.

The device works as follows.

In the absence of water in the downstream 12, the membrane 3 under the action of water pressure on it in the outlet 1 is pressed from the tip of the outlet 1, and water is fed through the opening 15 into the lower reach. At the same time, water from the outlet 1 through the opening 4 enters the lower chamber 9 and fills it. At the same time, the water displaces the air present in the chamber 9, which through the opening 8 of a smaller diameter moves into the upper chamber 10, and from there through the telescopic tube 11 is released into the atmosphere.

At this time, the hole 7 of larger diameter in the partition 6 is closed by a valve. 14 under the action of the own weight of the membrane 13.

When the lower chamber 9 is filled with water, the pressure in it increases, since the inflow of water from the outlet 1 greatly exceeds the possibility of its outflow through the opening 8, and the membrane 3 will cover the outlet of the outlet 1.

Water from the water outlet 1 in this position will continue to flow through the openings 4 and 8 into the upper chamber 10, after filling which the pressure in it will increase and the membrane 13 will rise, raise the valve 14 and release the opening 7. The pressure in the lower chamber 9 will decrease due to that the opening 7 of the partition 6 has a significantly larger diameter as compared with the opening 4 of the membrane 3. The membrane 3 will open the outlet of the outlet 1, and water through the opening 15 will be supplied to the lower pool 12.

When the water level in the downstream reaches the specified value, the external pressure on the membrane 13 under the action of the static: water column of the downstream 12 will begin to exceed the pressure in the upper chamber 10, the membrane 13 will lower and shut the hole 14 by valve 14.

At the same time, the pressure in the lower chamber 9 will begin to increase, and the membrane 3 will begin to cover the outlet of the outlet 1. Water inflow into the lower pool will decrease and stop completely when the water level of the lower pool 12 reaches a predetermined value. This will occur when the pressure in the upper chamber 10 reduced by the liquid column in the telescopic tube P. At the same time, the membrane 13 under the action of its weight and the weight of the liquid column above the membrane 13 will fall and block the opening 7. As the volume weight of the membrane elements 13 is greater than the volume weight of water , the installation height of the telescopic tube 11 will always be greater than the set predetermined water level, so that the flow of water from the downstream 12 into the hole 11 is excluded.

When lowering the water level in the downstream 12 and, accordingly, the height of the column above the membrane 13, the water pressure outside

Q on the membrane 13 will become less pressure from inside the chamber 10 on the membrane 13, and the latter will move up, opening up the opening 7. When this happens, the pressure in the lower chamber 9 will fall and the membrane 3 pod5 pressure on it in the water outlet 1 will be pressed from the outlet I and the water through the hole 15 will be fed to the downstream.

The operation of the device in the future will be

Q is similar to that described.

In the absence of water in the outlet 1, the membrane 3 will be pressed against the tip of the outlet 1 with the weight of the water in chamber 9, since there is a reverse on the opening 4

5 valve 5, which prevents the backflow of water from chamber 9.

The effectiveness of the invention lies in the fact that it eliminates the loss of water pressure, which is observed in known devices if the prevention of the backflow of water in the water outlet is provided by a spring-loaded membrane.

This allows the device to be used on rice irrigation systems; it is located 5 pukh in lowland floodplain places with differences of levels of 1-5 cm and higher.

The device provides pro-proportional level control.

Claims (2)

1. A device for adjusting the water level in the downstream, comprising a housing located on the supply pipe with a lid and a membrane locking element placed therein, communicated through an opening with an upper bump, and a telescopic pipe with a lower one, characterized in that the range of the difference in water levels in pools, the corius is divided by a horizontal partition with two openings of different diameters at the bottom of the chamber, and its lid is made in the form of a membrane with a valve that covers the opening of the partition of diameter. 2. A device according to claim 1, characterized in that the hole connecting the housing to the headwater is provided with a check valve. Sources of information taken into account in the examination: 1. The author's certificate number 244831, M. Kl.2E 02V 13/02, 1966. 2. The author's certificate number 334329, M. Kl.2 E 02B 13/00, 1970.