SU1283284A1 - Attenuator of rolling waves - Google Patents

Abstract

The invention relates to hydraulic engineering, namely, devices for damping rolling waves in fast-flow channels. The purpose of the invention is to increase reliability when changing parameters of rolling waves. In the channel-rapid 2 placed tubular camera 1 with check valve 3, knife-cutter 6 and valve 9. Knife-cutter 6 is pivotally connected to the floats-counterweights 13, to which is connected via cables 11 and blocks 12 valve 9. Floats-counterweights 13 installed in wells 14, connected to the channel-bypass 2. When approaching a rolling wave through the channel-bystroka 2 floats-balances 13 hold the knife cutter 6 in a certain position. The wave is cut off and quenched in chamber 1 by a check valve 3 and valve 9, as well as by discharging water through a perforated bottom 4. 1 hp f-ly, 3 ill. (L

Description

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The invention relates to hydrotechnical structures and can be used in the super-drilling mode, currents for damping rolling waves in fast-flow channels.

The purpose of the invention is to increase the reliability of operation when changing parameters of rolling waves.

FIG. 1 shows a damper, longitudinal section; in fig. 2 is a view tO A in FIG. one; FIG. 3 is a section BB in FIG. 2

Tubular chamber 1 is located in the upper part of the fast-flow channel 2. In chamber 1, a check valve 3 is attached in front of the hinge-5. At the front edge of the perforated bottom 4 of chamber 1, on the axis 5 there is a cutter 6. horizontal axis 7 with an air outlet 8 is formed a valve 9. Knife-cutter 6 through the console 10 is hinged, and the shut-off valve 9 through cables 11 on the blocks 12 is rigidly connected to counterbalance floats 13, placed symmetrically in the side wells 14, communicating with the top and bottom m byutrotoka underwater pipelines 15 and 16.30

20

25

When running onto the knife-cutter 6, the wave is cut off, the backflow valve 3 is opened by the wave and passes the wave into chamber 1, the air from the chamber is forced out through the opening 8, and the water is discharged back to the through-flow through the outlet 4 between the bottom 4 of chamber 1 and the shut-off valve 9 and through the perforated openings of the bottom 4 of the chamber 1. Making the bottom 4 of the chamber 1 perforated allows expanding the drain area, reducing the compactness of the jet and ensuring the emptying of chamber 1 until the next wave approaches. After the wave passes into chamber 1, the check valve 3 closes. The volume of chamber 1 is equal to the maximum volume of water in the crest of rolling waves, and the total size of the outlet and perforations in the bottom 4 of chamber 1 is selected from the condition of equality of the outflow time to the average period of rolling waves at a given flow rate. Considering that with a decrease in flow rate in wave speeds, the depths in the crests of the rolling waves decrease, and the average periods of the waves change slightly, it is necessary to reduce the outflow from chamber 1, which is done by closing the check valve 9 by lowering the counterbalance floats 13.

The device works as follows.

The knife-cutter 6 at the approach of a rolling wave is held at some 35 -

side wells 14

a short distance from the surface of the sole of the wave with counterweights by floats 13 due to the water level in the side wells 14, equal to the average filling in the sole and not in the crest of rolling waves with 40 waves, since the length of the sole (tail) of the wave considerably exceeds the length of the ridge. I

 The shut-off valve 9 adjusts the required opening of the outlet opening from chamber 1 by tensioning the cables 11 attached to the floats-counterweights 13. To prevent the opening of the shut-off valve 9 by an amount exceeding the calculated one and to prevent water from coming from the bottom layer of the flow, the sizes of the counterweights-floats 13 are set as follows.

45

50

The ripple depth in the channel-fast-2 does not affect the

due to

malge compared with the size of wells 14 diameters pitakitsih pipelines 15.

When the flow regime changes from super-tube (wave) to turbulent (stationary), which is often observed when the maximum flow rate is passed, the side wells 14 are set to a level equal to the stationary level of the free surface of water in the canape-bystroke 2, the cutoff water cut-off 6 to camera 1 is terminated.

Claims (2)

1. A damper of rolling waves, including a tubular chamber placed in the upper part so that the impulse of the weight of the counterweight weights of the fast current channel, floats 13 is greater than the number of non-return valves installed in the movement of the fluid mass in the crest of the wave entering the cutter 6 the rear of the camera, the shutter with a drive located in the back When running onto the knife-cutter 6, the wave is cut off, the backflow valve 3 is opened by the wave and passes the wave into chamber 1, the air from the chamber is forced out through the opening 8, and the water is discharged back to the through-flow through the outlet 4 between the bottom 4 of chamber 1 and the shut-off valve 9 and through the perforated openings of the bottom 4 of the chamber 1. Making the bottom 4 of the chamber 1 perforated allows expanding the drain area, reducing the compactness of the jet and ensuring the emptying of chamber 1 until the next wave approaches. After the wave passes into chamber 1, the check valve 3 closes. The volume of chamber 1 is equal to the maximum volume of water in the crest of rolling waves, and the total size of the outlet and perforations in the bottom 4 of chamber 1 is selected from the condition of equality of the outflow time to the average period of rolling waves at a given flow rate. Considering that with a decrease in flow rate in wave speeds, the depths in the crests of the rolling waves decrease, and the average periods of the waves change slightly, it is necessary to reduce the outflow from chamber 1, which is done by closing the check valve 9 by lowering the counterbalance floats 13. 35 - side wells 14 40 45 50 The ripple depth in the channel-fast-2 does not affect the due to malge compared with the size of wells 14 diameters pitakitsih pipelines 15. When the flow regime changes from super-tube (wave) to turbulent (stationary), which is often observed when the maximum flow rate is passed, the side wells 14 are set to a level equal to the stationary level of the free surface of water in the canape-bystroke 2, the cutoff water cut-off 6 to camera 1 is terminated. Invention Formula 1. A damper of rolling waves, including a tubular chamber placed in the upper part of the fast-passage channel, a check valve installed in the rear of the camera, the shutter with a drive located in the back and into camera 1. cameras, and a knife-cutter with a drive. 3128 mounted on an axis on the front edge of the chamber bottom, characterized in that, in order to increase reliability when changing parameters of rolling waves, it is equipped with a well connected by pipeline with a channel-bystrotok, and the drive of the knife-cutter is designed as a float-counterweight hinged to the knife-cutter and set- In this case, the valve is made in the form of a valve suspended on the horizontal axis, and the drive of the valve is made in the form of a cable-block system, the cable of which is attached to the counterbalance float. 2. Damper pop. 1, characterized in that the bottom of the chamber is perforated. view A