SU953075A1 - Bed of increased roughness for rapid flow - Google Patents

Description

(54) QUICK RELEASES OF INCREASED ROUGHNESS

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FIELD OF THE INVENTION The invention relates to hydraulic engineering.

A fleet is known, consisting of a cascade of closed elastic shells, each underlying shell being a water well for an upstream and at the same time supporting structure 1.

The disadvantage of this structure is the impossibility of automatically adjusting the shape of the shells, the free surface, the rate and degree of the kinetic energy of water when the flow rate passed by the fast-flowing part of the structure varies.

A hydraulic structure is also known, including shells of elastic material located on the fast-running part, made with water outlets and water-permeable portions located on the downstream side 2.

The disadvantage of this construction is that it does not automatically regulate the kinetic energy of the flow.

The purpose of the invention is to provide an automatic control of the kinetic energy flux gain on the fast-flowing part.

This goal is achieved by the fact that the speed of the raised roughness is made of shells located at different heights, and each odd sheath is fixed at the bottom of the speed current.

FIG. The image is represented by the rapidity above the roughness.

The rapid includes a cascade of shells 1 provided with water outlets 2. From the downstream side of the sheath there is a permeable section 3, which can be made of synthetic materials, ropes or can be formed by holes made in shells. permeable material. Along the length of the fast-moving part of the shell, the MO2Q can be positioned at different heights relative to the bottom, an alternation of the shells attached and raised above the bottom can take place, and, in particular, the shells can be fixed to the bottom of the rapid current. The distance between the shells in a cascade can be variable and depends on the required degree of quenching of the water flow energy in the structure.

Shells raised above the bottom of the rapid current can be attached to rigid elements 4.

Highway works as follows.

The water flow passing through the fast-flowing part enters through the slots 2 into the shells 1, as a result of which the latter are filled with water. Depending on the flow rate of water that is passed through, the shape of the shells changes (as the water flow increases, the crest of the shell rises above the bottom, which increases the roughness of the fast-flowing part). Therefore, at maximum flow, the shells have a maximum rise above the bottom of the rapid current, which leads to automatic regulation of the kinetic energy of the water flow in the fast-moving part. In addition, an increase in the degree of quenching of the energy of the flow with increasing water flow is due to the fact that the section of shells facing the lower reach is made of permeable material and has an orifice of various sizes. An increase in the flow rate at the construction leads to an increase in pressure on the inner surface of the shells, contributes to a more complete opening of the holes in the water-permeable part, through which a part of the flow passes by the structure.

The installation of shells at different heights relative to the bottom of the rapid current, the alternation of shells attached and raised above the bottom bends the flow trajectory, in turn, enhances the quenching effect of the kinetic energy of water on the structure.

Thus, the use of a fast-current of increased roughness of the proposed design will allow for automatic control of the quenching of the kinetic energy of the flow in conditions of increased reliability of operation.

Claims (2)

Invention Formula The roughness of increased roughness, comprising a cascade of shells of elastic material located on the fast-flowing part, made with water outlet slits and water-permeable sections located on the downstream side, characterized in that, in order to automatically control the quenching of the kinetic energy of the flow on the fast-flowing part of the structure, the shell are located at a different height, and each odd shell is fixed. {1ene at the bottom of the rapid current. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 620527, cl. E 02 B 7/02, 1978. 2. USSR author's certificate , № 279444, cl. E. 02 B 5/02, 1971.