Expandable desilting basin

FIELD: hydraulic structures, particularly cleaning device to take water for economic needs, namely sediment base gates, sand sluices and structures for arresting waterborne material.

SUBSTANCE: desilting basin comprises inlet check sluice, working chamber, outlet check sluice with flushing gallery and pressure spill-way. Working chamber width gradually increases in flow direction. Pressure spill-way may be extended and is installed at outlet check sluice inlet upstream of working gate. Impact baffle is installed downstream of working gate in groove provided for emergency gate installation. Extendable pressure spill-way may be vertically arranged or inclined and used as inclined canal.

EFFECT: increased efficiency of taken water cleaning, possibility to take water from upper cleaner stream layers inside basin.

3 cl, 5 dwg

 

The invention relates to hydraulic construction and can be used as a sump for water clarification in the household needs.

The famous river front intake with periodic washing [1], containing a sump with periodic flushing. The disadvantage of this technical solution are

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

lack of efficiency lightening flow;

- the proposed solution is not efficient, and economical.

The closest technical solution is the tank containing the input gateway controller, a working chamber output gateway controller with a wash chamber [2].

The disadvantage of this technical solution are

lack of efficiency lightening flow;

- relative economiccost technical solutions.

The purpose of the invention is improving the efficiency of the clarification of the flow and efficiency of the design of the sump.

This objective is achieved in that the flow of water enters the avankamera evenly and gradually expands and flows into the input gateway controller (figure 1). On the entrance gateway-controller is equipped with a groove for emergency repair of the shutter, and has a working shutter (figure 2). During operation of the sump working shutter in the fully opened. Then the water enters the working chamber, the geometrical dimensions of which are designed for speed, favorable for the deposition of particles calculated fraction. The width of the working chamber in the direction of flow is gradually increased, which leads to a marked reduction in the flow speed of the flow. Reducing the velocity of flow has a positive effect on the deposition of sediment contained in the water. Calculation of the dimensions of the working chamber on the inlet and outlet are on the flow coming into the discharge channel of QKahn. The cost of one camera depends on the adopted number of cameras

where n is the number of the working chambers of the tank. When adopted, the average longitudinal velocity of 0.1-0.2 m/s during deposition of sediment in the living section of all cameras will be

Thus, the calculated flow rate at the inlet may be 0.2 m/s, and the output is 0.1 m/s

For the rectangular cross section of width at a given depth Hcfwill be

The length of the working chamber 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.

As the flow stream of particles under the action of its own weight settled in the measures is the first volume of the working chamber. For washing the settled sediment, after filling the dead volume on the output gateway-controller is equipped with a rinsing gallery.

On the output gateway-controller is equipped with a working shutter, which during operation is fully open. Before working the bolt has a groove into which is inserted a sliding retaining Weir (figure 3). Working the bolt has a groove for emergency repair of the shutter, in which are inserted Sandra and going water wall. The height of the water wall is determined from the damping energy of the falling water flow-type thrust of the hydraulic jump. As a result of backwater created water retaining wall, there is a pair type thrust of the hydraulic jump and the effective damping of the energy falling from the overflow of water flow.

Installation of sliding retaining Weir allows you to collect water from the upper, more clarified layers, thereby improving the efficiency of the clarification thread. The receipt quantity of sediment in the downstream network, you can adjust the height of the sliding retaining Weir (figure 5).

If siltation of channels sediment by flushing prosvetlenny flow to clear the channels from load.

To reduce the pressure of the falling stream of water sliding retaining Weir can be installed with an inclination to be fast the shock (figure 4). The height of the sliding retaining Weir is determined depending on the required degree of water clarification. For weekend gateway-controller is equipped with grassroots interfacing section. The clarified water flows into the discharge channel.

Sliding the retaining Weir consists of a bottom gate and top gate, which have holes. For a full lifting of the sliding retaining Weir are inserted into the holes of the bolts for connection of the bottom gate and top gate (figure 5).

1 shows a longitudinal section of the expanding tank with sloped vertical sliding retaining Weir; figure 2 - plan of expanding settler; figure 3 - output gateway-controller with vertical sliding retaining Weir; figure 4 is a vertical sliding retaining Weir in the working position; figure 5 is a vertical sliding retaining Weir in the United and elevated position.

The sludge consists of avancuara 1, which adjoins the entrance gateway controller 2. In the input gateway-controller 2 includes a groove 3 for emergency bolt and work the shutter 4. The water clarification occurs in the expanding working chamber 5, which is adjacent to the output gateway controller 6 with a wash gallery 7. On the output gateway-controller 6 has a work stopper 8 and the groove 9 for emergency shutter, in which stable the tsya water wall 10. Input input gateway controller 6 has a groove 11, which is inserted into a sliding retaining Weir 12. Settling of sediment occurs in the dead volume 13 of the working chamber 5. Output gateway controller 6 is adjacent to the grassroots interfacing section 14. Sliding the retaining Weir 12 is comprised of a lower shutter 15 and the upper shutter 16, which have holes 17. The holes 17 are inserted bolts 18 for connection of the lower shutter 16 and the upper gate 17.

Expanding the sump works as follows.

The water flow enters the avankamera 1 evenly and gradually expands and flows into the input gateway-controller 2 (figure 1). In the input gateway-controller 2 has a groove 3 for emergency repair of the shutter, and has a working shutter 4 (figure 2). During operation of the clarifier work 4 shutter is fully open. Then the water enters the expanding working chamber 5, the geometrical dimensions of which are designed for speed, favorable for the deposition of particles of sediment estimated fractions. As the flow of water to the sliding retaining the Weir 12 water flow rate decreases and the sediment under its own weight deposited in the dead volume 13 of the expanding working chamber 5. For washing the settled sediment, after filling the dead volume 13, the output gateway-controller 6 includes a rinsing gallery 7. Shiri is and sliding retaining Weir 12 is determined from the crossing of a design flow. The calculated flow rate is the flow rate of the main channel.

On the output gateway-controller 6 has a working shutter 8, which during operation is fully open. Before working shutter 8 has a groove 11, which is inserted into a sliding retaining Weir 12 (figure 3). Working the bolt has a groove 9 for emergency repair of the shutter, in which are inserted Sandra and going water wall 10. As a result of backwater created water retaining wall 10, there is a pair type thrust of the hydraulic jump and the effective damping of the energy falling from the overflow of water flow.

Installation of sliding retaining Weir 12 allows you to collect water from the upper, more clarified layers, thereby improving the efficiency of the clarification thread. The receipt quantity of sediment in the downstream network, you can adjust the height of the sliding retaining Weir 12 (figure 4).

If siltation of channels sediment by flushing prosvetlenny flow to clear the channels from load.

To reduce the pressure of the falling stream of water sliding retaining Weir 12 can be installed with an inclination to be flow (1, 2). The height of the sliding retaining Weir 12 is determined depending on the required degree of water clarification. For weekend gateway-controller 6 has a grassroots has matched the store section 14.

Sliding the retaining Weir 12 is comprised of a lower shutter 15 and the upper shutter 16, which have holes 17. For a full lifting of the sliding retaining Weir 12 into the holes 17 are inserted bolts 18 for connection of the lower shutter 16 and the upper shutter 17 (figure 5).

The proposed solution will improve the stability and quality of the cleaning water supplied to the consumer, and is more cost effective than conventional clarifiers.

The device sliding retaining Weir allows you to collect water from the upper layers of the water flow, which is more clarified and thus, in the case of siltation of channels sediment by washing with a stream of clear channels from load.

The cost of construction or reconstruction of such an option intakes minor and quickly recovered.

Sources of information

1. The patent of Russian Federation №2272100, MKI EV 8/02, EV 9/04. Front river water with periodic flushing / Lamerton SG; Appl. 04.08.2004; publ. 20.03.2006, bull. No. 8 (Analog).

2. Speaker of the USSR №332163, IPC EV 8/02. A sump for sediment deposition/ Dulnev V.B. have been, (USSR); Appl. 25.11.69; publ. 18.05.1972, bull. No. 10 (Prototype).

1. Expanding the sump containing the input gateway controller, a working chamber output gateway controller with a wash gallery and retaining Weir, distinguish the different topics that the width of the working chamber gradually increases in the direction of flow, retaining Weir made sliding and installed at the input of the output gateway controller before working shutter, and work the seal in the groove provided for emergency shutter, installed water wall.

2. The settling tank according to claim 1, characterized in that the sliding retaining Weir is installed vertically.

3. The settling tank according to claim 1, characterized in that the sliding retaining Weir mounted and is flow.



 

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