SU540961A1 - Automatic shutter to control water level - Google Patents

Description

one

The invention relates to automatic water level and differential level controllers and can be used in hydraulic structures, for example, on reclamation canals.

Automatic shutters are known that contain a yoke mounted on the bases with the possibility of rotation about a horizontal axis, on one arm of which a shield is fixed, on the other - a float.

A disadvantage of the known devices is the large required weight of the load and the inaccuracy of the adjustment to maintain different levels of water in the upstream.

In order to reduce the weight of the shutter and ensure that the adjustment parameters in the proposed device are changed, the float is flooded below the headwater level and is installed with the possibility of vertical and horizontal movement.

To increase the control accuracy on one shoulder with the float, a water-filled float is placed between the levels of the upper and lower pools, and its cavity is connected to the upper pool level with a rigid tube, the intake end of which is located at the upper pool level, the float cavity with the lower pool is connected with a flexible tube whose flow area is less than that of a rigid tube. In addition, the cavity of the float is connected to the atmosphere.

FIG. 1 and 2 shows the scheme of the described device.

The automatic shutter turns on the rocker 1, mounted on a stand x 2, can be rotated about the horizontal axis 3. On one arm of the rocker arm 1 is fixed a shield 4, and on the other - submerged under

the level of the upstream float 5. To change the parameters of the water level control, the float 5 has the ability to move vertically and horizontally using the movement mechanism 6.

To increase the accuracy of adjusting a given water level in the upper reach on one shoulder with float 5, it is installed between the levels of the upper and lower tails of the water-filled float 7. The cavity of the water-filled float 7 is connected to the upper tail level by a rigid tube 8, the intake end 9 of which is placed at the level of the required horizon upstream, and downstream - flexible tube 10, and tube I - with the atmosphere. The flexible tube 10 has a lower throughput than the rigid tube 8. The automatic shutter operates as follows. The water level in the upstream, which must be automatically maintained by the shutter.

set by moving the main 5 and water-filled 7 floats fixed on one frame 12 by their horizontal movement by means of mechanism 6 until the inlet cross section of the rigid tube 8 coincides with the set upper reach, and the level difference is shifted by floats horizontally, thus achieving an equilibrium state no system with floats submerged under the headwater.

When raising a given water level in the upstream or increasing the differential, the shield 4 opens under the action of the hydrostatic pressure of the water, and the float 5 rotates, reducing the holding moment due to a change in shoulder. After reaching a predetermined level or differential, the shield closes and the entire system comes to equilibrium. The water-filled float 7 in the emptied state increases the moment by keeping the shield 4 from turning to open.

When the upper water level exceeds the preset water level, the water-filled float 7 is filled with water through a rigid tube 8 and reduces the amount of torque holding onto the opening for acting on the shield 4.

After the shield 4 is closed, the water from the float 7 is discharged through the flexible tube 10 to the lower pool. Water-filled bobber 7 has a tube 11,

derived into the atmosphere above the possible level of the upstream.

Claims (2)

1. An automatic shutter for adjusting the water level mainly in hydraulic structures of land-reclamation systems, containing a rocker arm, installed on the base can be rotated relative to the horizontal axis, on one shoulder of which a shield is fixed, and on the other - a float, characterized in that, in order to reduce the weight of the shutter and ensure the change of control parameters, the float is flooded under the level of the upstream and installed with the possibility of vertical and horizontal movement. 2. The automatic shutter according to claim 1, characterized in that, in order to increase the regulation accuracy, a water-filled float is placed on one shoulder with the float, placed between the levels of the upper and lower pools, and its cavity is communicated with the level of the upper pool is a rigid tube, the intake end of which is placed at the level of the upper pool, with the lower pool - a flexible tube, the flow area of which is less than the flow area of the rigid tube, and with the atmosphere. j Vus.2