SU1028769A1 - Water outlet of canal with turbulent flow - Google Patents

Abstract

WATER SC FROM CHANNEL C; CURRENT LOWING including a well made at the bottom of the canal, connected to a discharge conduit, ac-g; mounted on the horizontal axis in the upper part of the wall of the well located in the direction of the flow, and the horizontal visor is fixed on the opposite wall, which means that with the goal; bandwidth increase, the ratio of the width tdata to, the width of the visor is l; 2i

Description

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The invention relates to hydraulic structures and is intended to be used when drawing water from canals with a CURRENT flow regime.

 water outlet from the channel with a rapid flow, containing the bottom water intake gallery, trash the lattice and the shutter, located vertically at the beginning of the drainage Clj.

However, the water supply to the outlets in quantities lower than the calculated (maximum) flow rates is carried out with the holes covered by the gates.

When the water intake is turned off (the valves are completely lowered), sediment that has fallen through the grate into the gallery floods it. This worsens the operation of the structure.

Also known is the water supply from the canal with rapid flow, including a well made at the bottom of the channel,. a shield connected to the diverting duct mounted in the horizontal axis and the upper part of the wall of the well facing the flow direction / and the horizontal visor fixed on the opposite wall C2l.

The disadvantage of this device is low bandwidth.

. The purpose of the invention is to increase throughput. : The goal is achieved by the fact that the ratio of itta width to visor width is 1: 2.

FIG. 1 - water outlet in the plan is depicted; in fig. 2 shows section A-A in FIG. 1, in FIG. 3 - the same, with a well with a beveled incoming edge.

The device consists of a channel 1, the bottom of which is made well 2

having a shield 3 with a horizontal axis 4 of rotation, a visor 5 and a grill 6. The shield 3 is provided with a drive 7.

The well 2 may have a bevel 8, the angle of which 9 is determined from the condition for the exclusion of a vacuum beyond the bevel. According to research data, the angle ff at which a vacuum occurs can be determined by the formula H-ak-ctoK / -

f

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where F - is the kinetic parameter of the 6th stream;

V - water flow rate, - free acceleration

fall; K - coefficient equal to

0.70-0.80; B is the depth of flow. The given dependence indicates a decrease in the angle V .1 by an increase in the kineticity parameter (or velocity) of the flow from 32® with G 1 to 20 at F, 10.

The well ni and the conduit 9 is connected to the well 2. The ratio of the width of the shield 3 to the width of the visor 5 is 1: 2.

The device works as follows.

The water passes through the grate 6 to the well 2 and further to the outlet branch 9.

The flow rate is adjusted by opening the shield 3 by means of the drive 7. The ratio of the width of the shield 3 to the width of the visor, equal to 1: 2, allows an increase in the capacity of the device, since it is this ratio that observes a small flow in the discharge conduit 9.

Claims (1)

DISCHARGE FROM CHANNEL C; DRILLING, including a well made in the bottom of the channel, connected to the outlet conduit, a shield mounted on a horizontal axis in the upper part of the well wall facing the direction of flow, and a horizontal visor mounted on the opposite wall, from the bottom and with the fact that, in order to increase throughput, the ratio of the width of the shield to the width of the visor is 1:21