Front-entrance water intake

FIELD: hydraulic structures, particularly intake structures to take water for economic needs.

SUBSTANCE: front-entrance river water intake comprises spillway dam and water intake with two or more parallel setting chambers and transversal water-accumulation gutter having bottom located over water surface during setting chamber flushing. Width of side setting chamber in plane view in stream direction gradually increases in accordance with the equation y=(2h/S2ch)(x2/2), where h is assumed expansion in the end of side setting chamber, Sch -s length of side setting chamber. Side walls of transversal water-accumulation gutter may rotate about fixed axis by means of driving mechanism.

EFFECT: possibility to increase water cleaning efficiency due to transversal water-accumulation gutter wall rotation and possibility of water taking from upper, clean, layers inside setting chambers.

8 dwg

 

The invention relates to hydraulic construction and can be used as a diversion structure for collecting water for household needs.

A device for cleaning of channels from sediments [1], comprising a retaining shield and accessories under the shield in the form of propellers with brushes. This device can be used as a means for cleaning the sumps from the sediment using the energy of water flow. The disadvantage of this technical solution are:

- the complexity of the structures due to the large number of different elements;

the relative duration of the leaching process;

- the proposed solution is not efficient, and economical.

The closest technical solution is river Front intake with periodic flushing [2], which contains the spillway of the dam and water intake with two or more parallel cameras-precipitation, cross drainage tray. The disadvantage of this technical solution are:

- the relative complexity of leaching after silting chambers;

- insufficient water purification;

- relative economiccost technical solutions for water intake.

The purpose of the invention. Improving the reliability and reducing the labor required for the performance of the leaching chamber of the sump.

This objective is achieved in that the flow of water upstream of the dams, which is routed to the overflow of the dam, backing, increases the elevation of the water in the river to the desired level. Before the spillway dam is held depressed, which lengthens the path of the filter and thereby reduces the filtration pressure on water well and seepage gradients. As a result of backwater created spillway dam, water flows into the camera-settlers. Calculation of cell sizes of tanks are on the flow coming into the discharge channel of QKon. Consumption of a single chamber tank depends on the adopted number of cameraswhere n is the number of working chambers of the tank. When adopted, the average longitudinal velocity of 0.2-0.4 m/s, during the deposition of sediment, the living section of all cameras-settlers will be.

For the rectangular cross section of width at a given average depth Hcf. Camera-the tank has an upper gateway controller and lower the gateway controller. Top gateway controller has the groove for emergency repair of the bolt and work the shutter, which during operation is fully open. Groove for emergency repair of the shutter is provided in front of the working gates and n is th during construction or renovation inserted sandoria boards. Grassroots gateway controller also has a flushing valve and the groove for emergency repair of the shutter, which is arranged for proryvnym gate. During operation, the washing shutter is closed and the camera-clarifier works on sedimentation. The length of the side cameras tank is determined by the formula:where k is a numerical coefficient, taken within 1,3-1,5; ω - hydraulic estimated size fractions of sediment subject to deposition.

When specified flushing speed of 3.5-4 m/s water depth in the chamber will be determined by the formula:. For depth h, the calculated value of the hydraulic radius R, the coefficient C and the Chezy formula to find the slope of the bottom of the camera-settler.

Fence clarified water is carried out by the overflow of water through the walls of the drainage tray and entering it into the intake gateway controller, which includes a valve for controlling the flow of water flowing into the discharge channel. The device of catchment tray allows you to collect water from the upper layers of the water flow, which is more clarified, and thus reduce, if necessary, the length of the working chamber of the sump. The side walls transverse drainage tray, through which flowing water, revolve around the fixed axis of rotation, this regulation is : consumption water consumption for the consumer.

Mark the bottom of the water tray is located above the surface of the water when washing. Thus, the drainage tray does not interfere to effect flushing of deposited sediment. After silting of the dead volume one of the chambers of the tanks is necessary to carry out washing. This raises the height of the working speed and the flow of water flows and washes set aside on the bottom sediment. The bottom of the camera-sump designed for bias based transportation volume of deposited sediment. While washing, rinsing the shutter is fully open. Flush time in minutes is determined from the dependencewhere ρTrthat ρoaccordingly transporting ability and the turbidity of the stream; γn- specific weight of sediment; Vmeasuresdead volume of the chamber tank. Normally, the washing time is 10-20 minutes. While washing one of the cells of the sump water flow in the drainage tray through other camera-settlers.

At the bottom of the camera and settling tanks are provided, which walls that prevent disruption of the flow during the flushing of deposited sediment and accelerate the process of flushing of deposited sediment. The height of the walls, which is made greater than the depth of the flow of water when washing.

After cleaning, working the ameres tank work the shutter is fully open and lowered a little flushing valve and water flow, deriving from under him, and, passing through the transit area, washes away all set aside sediment and directs them into the lower reach, the river bed. During leaching, the shutter is closed, and the supply of water to the consumer stops. After leaching the gates are in the initial position and the supply of water to consumers via a tailrace channel again resumed.

For full effective flushing of all of the sediment that enters a transit station, the slope of the bottom is greater than or equal to the slope of the bottom chamber of the sump.

To achieve the greatest effect, the width of the side camera-sump increases gradually from the beginning to the drainage tray on the amount received expansion chamber tank and, therefore, the condition. Dividing this equation and prointegrirowany, get. Substituting initial and final conditions, get the value of the coefficient. Then

,

where h is the accepted extension at the end of the working chamber tank, SCam- the length of the side of the camera-settler.

Figure 1 shows the front river catchment plan; figure 2 - section a-a in figure 1; figure 3 - section b-b In figure 1 during operation; figure 4 - section C-C in figure 1; figure 5 - section b-b In figure 1 during the washing chamber tank; the and 6 is section b-b In figure 1 during the washing hop; 7 - section D-D figure 5; Fig shows a cross-section of catchment tray with a rotating side walls.

Front river water with periodic flushing consists of spillway of dam 1, which adjoins the upper side depressed 2, and on the lower side of the water well 3. Front river water has foundations 4 that mate, which dams 5 with the upper reach of river, 6, and grassroots interfacing dams 7 with the lower water 8. Side is provided by the lateral camera-settling tank 9 having a top gateway controller 10 and the lower gateway controller 11. In the upper gateway-controller 11 has a working shutter 12 and the groove for emergency shutter 13. In the lower gateway-controller 11 includes washing the shutter 14 and the groove for emergency shutter 15. For lower-gateway-controller 11 provides a transit station 16 with a bias. The bottom 17 of the side camera-settler 9 is designed with a bias for transportation of suspended sediment during washing. The clarified water flows into the drainage tray 18 which is adjacent the intake gateway controller 19, which includes a shutter 20 to regulate the flow of water flowing into the discharge channel 21. To improve the washing process of sediment in a side chamber, a settling tank 9 on the bottom 17, which has a wall 22. In oborny tray 18 has side walls 23, which rotate around the axis 24 by means of the drive mechanism 25.

Front river intake works as follows. The flow of water upstream of the 6 dams, which 5 is routed to the overflow dam 1, which, shoring, increases the level up to the required level. Before spillway dam 1 is arranged downcast 2, which lengthens the path of the filter and thereby reduces the filtration pressure on water well 3 and seepage gradients. Front river water has foundations 4 that mate, which dams 5 with the upper reach of river, 6, and grassroots interfacing dams 7 with the lower water 8. As a result of backwater caused by the device of the spillway dam 1 water flows into the camera-tanks 9 (Fig). Side Luggage-tank 9 has an upper gateway controller 10 and the lower gateway controller 11. Top gateway controller 10 is operable shutter 12, which during operation is fully open, and the groove for emergency repair of the shutter 13. Groove for emergency repair of the shutter 13 is provided before working shutters 12. Grassroots gateway controller 11 also has a washing shutter 14 and the groove for emergency repair of the shutter 15, which is arranged for proryvnym shutter 14. During operation (figure 3) wash the shutter 14 is closed and the side camera sump 9 is on sedimentation. Fence ovet the military water is the water overflow through the upper edge of the drainage tray 18 and then enters the intake gateway controller 19, which includes the shutter 20 to regulate the flow of water flowing into the discharge channel 21. Mark the bottom of the water tray 18 is located above the surface of the water during the flushing of sedimentation tank (figure 5). The side walls 23 of the transverse drainage tray rotate around a fixed axis of rotation 24 by means of the drive mechanism 25, it regulates the flow of water to be abstracted for the consumer (Fig). After sedimentation of dead volume in one of the cells-tanks 9, you must make it a wash (5, 7). This raises the height of the work the shutter 12 and the stream of water flows and washes set aside on the bottom sediment. The bottom 17 of the side camera-settler 9 is designed for bias based transportation volume of deposited sediment. While washing, rinsing the shutter 14 in the wash chamber sump 9 is fully open (Fig.6). After cleaning the working chamber tank 9 operating the shutter 12 is fully opened, lower a little wash the shutter 14 and the flow of water flowing from under him, flows through the transit area 16, washes away all set aside sediment and directs them into the lower reach 8, in the riverbed. During leaching, the shutter 20 is closed and the supply of water to the consumer stops. After leaching the water supply to consumers through the discharge channel 21 again resumed. For achievement of the greatest effect of the width of the side camera-settler 9 is increased gradually from the beginning to the drainage tray 18 and therefore, the condition. Dividing this equation and prointegrirowany, get. Substituting initial and final conditions, get the value of the coefficient. Then

,

where h is the accepted extension at the end of the side camera-settler 9, SCam- the length of the side of the camera-settler 9.

To improve the washing process on the bottom side chamber of the sump 17 is provided, which wall 22.

The proposed solution will improve the stability and quality of the cleaning water supplied to the consumer, and is more economical compared to option in the construction of individual septic tanks.

The device of catchment tray allows you to collect water from the upper layers of the water flow, which is more clarified, and thus reduce, if necessary, the length of the working chamber of the sump.

Construction costs of this alternative water intake 1.5 times less than water intakes individual sumps.

Sources of information

1. A.S. 1781383 the USSR, MKI EV 15/00. A device for cleaning the channels with concrete lining from sediment / Lamerton SG, Chulkov K.S., M. Stepanov, V.V. Dokuchaev (USSR); Statements. 18.04.91; publ. 15.12.92, bull. No. 46.

2. RF patent №2272100 MKI is W 8/02, 9/04; Front river water with periodic flushing / Lamerton SG; Statements. 04.08.2004; publ. 20.03.2006, bull. No. 8 (prototype).

Front river water containing a water dam and water intake with two or more parallel cameras-sumps and transverse drainage tray, the bottom of which is located above the surface of the water when washing cameras-settlers, characterized in that the width of the side camera tank in terms of the direction of flow of the stream increases gradually in accordance with the equation

where h is the accepted extension at the end of the side camera-settler;

SCam- the length of the side of the camera-tank

the side wall transverse drainage tray mounted for rotation around a fixed axis by the drive mechanism.



 

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