SU1564597A1 - Stop gate - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering, in particular to hydraulic gate valves operating as part of water intake structures located on sections of rivers of the mountain-piedmont zone. The purpose of the invention is to increase reliability by facilitating the discharge of floating objects during the flood period. The hydraulic gate contains a flat shield 1, to which a steering visor 3 is attached by means of a hinge 2. The shield 1 has a washing hole 16 with a washer 12, a counterweight 10 and a cantilever 8, the ends of which are attached by hinges 9 to the abutment elements 7. The visor 3 by means of rigid tg g 5 with hinges 4 and 6 is also connected with elements of 7 abutments. The hinges 2,4,6 and 9 in the vertical longitudinal plane are located at the vertices of the parallelogram. With a low water level in the channel 18, the shield 1 is closed. When the water level rises in channel 18, the washer 12 first opens, then sediment is discharged through hole 16 into channel 24. With a further increase in level in channel 18, shield 1 rotates at hinges 9, while visor 3 is brought out above water surface by shield 1. All floating objects are dropped through the open span between the pillars into the channel 24. 3 sludge.

Description

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washing device 12, the counterweight 10 and the console 8, the ends of which the hinges 9 are attached to the elements 7 abutments. The visor 3 by means of rigid tg g 5 with hinges 4 and 6 is also connected with elements of 7 abutments. The hinges 2, 4, 6 and 9 in the vertical longitudinal plane are located at the vertices of the parallelogram. With a low water level in the channel 18, the shield 1 is closed. When raising

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The level of water in channel 13 first opens the washer 12, then sediment is discharged through hole 16 into channel 24. With a further increase in level in channel 18, shield 1 rotates at hinges 9, while visor 3 is brought out above shield 1 by shield 1. All 10 floating objects are dropped through the open span between the pillars into the channel 24. Zil

The invention relates to hydraulic engineering and is intended to automate dam water intake structures located on sections of the rivers of the mountain-piedmont zone.

The purpose of the invention is to increase reliability by facilitating the discharge of floating objects during the flood period.

FIG. 1 shows a water intake structure with a hydraulic gate, top view; in fig. 2 shows section A-A in FIG. 1, with the shutter closed; in fig. 3 - the same, with the shutter open.

The hydraulic gate consists of a flat shield 1, to which, with the help of a hinge 2, a diverting visor 3 is attached by a lower part. In the upper part of the visor 3 there are hinges 4 connected by rigid rods 5 with hinges 6 located on a fixed element 7. Tsit 1 has consoles 3, the free ends of which are connected by hinges 9 to the elements 7. Shield 1 is balanced by a counterweight 10. Hinges 6 and 9 remain immobile when the shutter is operated, and hinges 4 and 2 move with the shield 1 in the longitudinal vertical plane. At the bottom of the shield 1 On the rotation axis 11, a washer 12 is suspended, made in the form of a hollow tank 13, equipped with an inlet 14 and an outlet 15 controlled valves located in the washing hole 16 made in the lower part of the shield 1. The hinges 2, 4, 6 and 9 are located in the vertical planes at vertices of a parallelogram. The elements 7 of the tin are attached to the mounts made in the composition of the water intake structure in the form of circulation thresholds 17, located at an acute angle to the axis of the channel 18. The water intake structure 5

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It also includes chambers 19, flow stabilizers 20, diverting channels 21, pipe 22, communicating chambers 19 and waste spillways 23 providing water discharge from chambers 19 to diverting channel 24. To prevent tilting shield 1, there are stops 25 on elements 7 .

Hydraulic valve works as follows.

As long as there is no water in the upstream (channel 13) or the level has not reached the calculated one, the hydraulic gate is in the closed position, blocking the opening of the central span,

The flow visor 3 is lowered to its most extreme position and is in flow. The washing device is adjusted to the level of the upper pool below the calculated one by 0.15–0.20 m, at which the required flow rates of water into the chambers 19 and their supply to the discharge channels 21 are ensured.

Adjusting the washer 12 to a predetermined level is performed by the inlet 14 and the outlet 15 valves.

With an increase in the flow of water in the channel 18, the level in the upstream reaches and the washer 12 enters into operation, opening an opening 16,

When the water levels in the upstream are higher than the calculated hydrostatic and hydrodynamic force (due to an increase in flow rates), the pressures increase and the shield 1 begins to open. But since the diverting visor 3 is pivotally connected to the shield 1, it begins to move in a vertical plane upwards. When the shield 1 is opened at an angle of 30-35 °, the diverting visor 3

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extracted from water and calculated level.

Opening the shield 1 at 30-35 ensures that water and floating objects are passed through. The washer 12 is also removed from the stream, as it is hinged on the gate and moves with it.

With a decrease in water consumption and levels in the upstream, the shield 1 begins to close and simultaneous lowering of the diverting peak 3 and its immersion into the stream occurs. The submerged diverting visor 3, cutting the flow vertically, directs the lower layers, saturated with sediments, to the hole 16 with their subsequent washing to the lower pool (bed 24) of the structure. The movement of the lower layers of the flow to the opening 16 is due to the pressure difference upstream and downstream of the diverting visor 3, which is expressed by the difference in levels Z (Fig. 2).

During the low water period, the flow control valve completely closes the opening of the river span and all the water flow is taken to the discharge channels 21. The washer 12 is also in the closed position. In view of the fact that the main part of the water flow enters through the stepped circulation thresholds 17, the movement of the lower layers of the flow occurs under the diverting visor 3 with the formation of a difference in Z levels, which contributes to the movement of the sediment of the sediment to the washing hole 16,

The low-water period is preceded by a flood period, when the headwater is washed from sediments, therefore sediment deposition and their movement to the washing hole 16 occurs in slow-motion mode.

The activity of the sediment movement increases with the passage of mid-year water flow along the river, accompanied by increased levels in the upstream. During this period, the washer 12 partially or completely opens the opening 16 and the sediments under the diverting hood 3 move to the washing opening 16 and are removed to the lower pool along with excess water. Water that has been decontaminated, overflowing through circulation thresholds 17, enters chambers 19. Water consumption stabilizers 20, installed 15

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The cells in the intake chambers 19 provide for the intake of the estimated water flow into the diversion channels 21.

Due to the symmetrical arrangement of the circulation thresholds 17, their equal altitude arrangement and the same capacity, equal flow rates of water flow into the chambers 19 of the receivers.

At different water supply to the diversion gannels 21, the redistribution of the incoming water into the chambers 19 of the intakes is provided by a pipe 22 arranged under the flybet of the structure. Excess water, in excess of being diverted to the outflow channels 21, is discharged through weirs 23 to the downstream of the structure and then drained along the channel 24.

The flood regime of the facility is characterized by the passage of increased water flow along the river, the transport of a significant amount of sediment and floating objects, and an increase in the water levels in the upstream.

When the water levels increase above the design shield 1, it opens under the action of hydrostatic and hydrodynamic pressures, providing simultaneous horizontal and vertical movement of the diverting visor 3. With the opening of shield 1 at an angle of 30-35 °, its density has little effect on the opening capacity of the central span and the main stream, together with floating objects and sediments, is removed to the downstream of the structures. In this case, the diverting visor 3 is raised to its extreme upper position and does not prevent the floating objects from dropping and dropping them into the lower reach.

Claims (1)

Claims of the invention Hydrotechnical closure comprising a flat shield with a washing hole in the lower part, a counterweight and consoles on the front face, connected by pivotally free ends with the struts of the structure, a washing device made in the form of a tank with inlet and outlet controlled valves suspended from the panel so that it can be rotated in the washing hole, and a diverting peak located in front of the panel , characterized in that, in order to increase the reliability of operation by ease of dumping of floating objects during the flood period, it is equipped with a rigid thrust, hingedly attached the ends to the visor and the abutment of the structure ,,, lie in a vertical longitudinal and the visor is hingedly attached to the pinch at the vertices of the parallelogram 27 V FIG. 6 5748 25 3 one that can be rotated in a vertical longitudinal plane, with the hinges of the shield, visor, and the tie bars at the vertices of the parallelogram.  T Aa ten eleven