RU2591967C1 - Water flow energy dampener - Google Patents

Abstract

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic engineering, namely to devices for water flow energy damping. Water flow energy dampener comprises water deflector well 3 arranged between input 1 and discharge channels 2, a flow divider 4 arranged at the end of the feed channel 1 to divide it into two equal open channel 5, 6 coupled with diffusers 7, 8, outlet section mate tangentially with chambers 9, 10 spiral shape in plan. Chambers 9, 10 have inner surface shaped to truncated cone and are arranged vertically in well 3 where chambers connect with diffusers 7, 8. Chambers 9, 10 are separated by vertical wall 11 along the length of the well 3. Lower end face wall 11 is equipped with horizontal flanges 12, 13, installed on the side of small bases of truncated cones and overlapping the middle part of the area of the well 3. Vertical wall 11 is fixed to the cover of the well and to side walls of both Chambers 9, 10 with its both sides. Height of Chambers 9, 10 is not less than half the height of the well 3. Flow leaving chambers 9, 10 through the smaller base, interacts with horizontal flanges 12, 13, first, expands, and then connects in well 3 with general flow and is dampened in it.

EFFECT: higher efficiency and reliability of damping of kinetic energy of the separated flow of the compound in well, excluding local eroded in discharge channel, which provides achieving the goal.

1 cl, 2 dwg

Description

The invention relates to hydraulic engineering, and in particular to devices for damping the energy of a water stream.

Known damper energy flow, mainly mudflow, including located on the same axis inlet and outlet channels and placed between them streamlined from the sides of the barrier, installed at the bottom and dividing the inlet channel into two channels of equal width, bounded on the outside by the lateral sides of the inlet channel and directed beyond the obstruction towards each other, the obstruction is made in the plan in the form of a trapezoid with a frontal face installed with a reverse slope towards the flow and mating with the bottom of the watercourse, The discharge channel is made with a width smaller than the width of the supply channel (copyright certificate SU No. 1550033, E02B 8/06, dated 03.15.1990).

Its disadvantage is the low reliability of the quenching of kinetic energy, due to the directness of the flows moving towards each other.

A known energy damper of a water stream with a curvilinear vertically curved water wall installed at the level of the inlet channel having an end part in the form of a console and an opening located at the bottom of the well covered by a concave throttling plate (copyright certificate SU No. 1562396, E02B 8/06, dated 07.05 .1990).

The disadvantage is the unidirectional swirling of the flows, leading to the summation of the kinetic energy of the resulting vortices, which reduces the efficiency and reliability of quenching the water flow.

A water flow energy damper is known, consisting of a series of piers, each of which has an upper, rear and two side faces, which in plan are a triangle, the top of which is directed towards the stream, the upper side is protruding above the side faces having a concave curved surface and tilted towards the flow, and the side faces are interfaced with one streamlined surface (copyright certificate SU No. 947265, E02B 8/06, dated July 30, 1982).

However, this design provides only partial damping of the flow energy due to existing piers, their front faces smoothly flowing around and the mass of water acquires rotational motion around the flow axis, and then these piers expand downstream, creating a general confusion of the flow, and do not provide damping of turbulent jets, which cause erosion behind the structure, which requires additional operating costs.

Known flow energy damper, including a cylindrical water well, a flow divider in two branches tangentially connected to the well, damper plates are mounted on racks with the possibility of vertical movement and are made with walls located around their perimeter (copyright certificate SU No. 1059054, E02B 8 / 06/12/1983).

The disadvantage is the complication of the design of the plates associated with unloading containers filled with water. At the same time, impact on the fastening elements of the outlet channel is not excluded, which means that this does not contribute to sufficient smoothing of the water surface. The efficiency of quenching the flow energy is low. Moreover, the complexity of the design of the slabs is difficult due to reinforced concrete work, it is possible to jam the slabs when surfacing and moving along the racks, since the force of the resultant hydrostatic pressure in the well at different points is not the same across the entire pressure plane of the slabs.

The technical problem to which the invention is directed is to increase the efficiency and reliability of the process of quenching the kinetic energy of a shared stream due to the subsequent connection of its parts twisted in mutually identical directions.

The technical result is achieved by the fact that the energy damper of the water flow, including a water well located between the inlet and outlet channels, the flow divider, is equipped with flow dampers made in the form of chambers, the inner surfaces of which have the shape of a truncated cone, mounted vertically in the well cantilever at the junction points chambers with diffusers, the inlet sections of the diffusers are connected to the supply channel, and the chambers are separated by a vertical wall along the length of the well, the bottom end of the vertical hydrochloric wall has a horizontal shelf defined by the small bases of the truncated cones and middle portion overlying the well area, wherein the height of the chambers is at least half the height of the well.

In FIG. 1 shows a schematic diagram of a water flow energy absorber, plan; in FIG. 2 is a section AA in FIG. one.

The energy absorber of the water stream comprises a supply channel 1 and a discharge channel 2, dividing a water well between them 3. A supply channel 1 is provided with a stream divider 4, dividing the supply channel 1 into two open channels 5 and 6 of equal width with diffusers 7 and 8, the inlet section of which connected to channels 5 and 6, and the output section mates tangentially with dampers in the form of chambers 9 and 10 spiral in outline, and the placement height in it is not less than half the height of the water well 3.

Chambers 9 and 10 have an inner surface in the shape of a truncated cone, installed by a large base in the upper part of the well at the junction with diffusers 7 and 8 of the inlet channels 5 and 6, and the small base of the truncated cones is located towards the bottom of the well 3. The height of the chambers 9 and 10 is at least half the height of the water well 3. Chambers 9 and 10 are separated by a vertical wall 11, to the lower end of which a horizontal shelf 12 and 13 is attached for each chamber with the possibility of placing them above the bottom of the well 3 in one horizontal plane with chambers 9 and 10. The vertical wall 11 separates the quench chambers 9 and 10 with a zone of independent rounding of their inner surface from the condition of ensuring a smooth transition from the large base to the smaller base of the truncated cones to the orientation toward the bottom of the well (the cameras are made cantilever in well), and the horizontal shelves 12 and 13 of the wall 11 are installed parallel to the bottom of the water well 3 with the possibility of partially overlapping towards the small base of the truncated cone, and the bottom of the well 3 is located neither the bottom of the discharge channel 2 (not shown).

The energy absorber of the water stream operates as follows.

The water flow moving along the supply channel 1 is divided by a divider 4 into two equal flows, which are sent to the open channels 5 and 6 (sleeves), then sent to the diffusers 7 and 8. The water flow passing through the diffusers 7 and 8 is tangential and smooth it enters chambers 9 and 10, whose inner surfaces are in the form of a truncated cone with large and small bases, and moves along them, describing a spiral curve. The height of each chamber 9 and 10 is selected from the condition that within its limits the flow makes no more than two revolutions. Upon exit, the flow from small bases, spreading towards the bottom of the well 3, enters the horizontal shelves 12 and 13, fixed to the lower end of the vertical wall 11, and through the slot enters directly into the water well 3. This causes an increase in the fragmentation of the stream jets into the well, where they, hitting the surface of the water (water cushion) in it, mix with each other. This movement contributes to the intensive quenching of the waste stream. The annular sections of the two flows in chambers 9 and 10 below the small base of the truncated cones expand and contract again, then mix in the well 3 into one common stream for movement towards the outlet channel 2. The resulting mechanism of incident masses of water from above into the well 2 distributes energy the entire area of the well, since chambers 9 and 10 are mounted cantilever above the bottom of the well 3 for at least half its height.

In the proposed device for damping the flow energy, the effects of damping by the counter jets of falling and spreading in the well 3 are used.

The proximity of the shapes of each of the chambers 9 and 10, separated by a vertical wall 11 with horizontal shelves 12 and 13, increases the influence of quenching of the jets coming from chambers 9 and 10, then meeting the water cushion in the well 3, the flow is completely quenched, which then discharged into the outlet channel 2.

The use of the proposed technical solution can significantly expand the scope of water flow energy absorbers, and also increases the efficiency of quenching the kinetic energy of the shared stream, this is achieved as a result of movement in chambers, the inner surfaces of which are in the form of a truncated cone with a vertical wall 11 separating them with horizontal shelves 12 and 13, fixed from the bottom of its end, based on the relationship and interdependence of the elements of the energy absorber, as well as the fact that the height of the chambers is ie not less than half the height of the well. Thus, all together and determines the achievement of the goal with a significant reduction in operating costs for such objects of hydraulic engineering construction, including spiral extinguishing chambers.

Claims (1)

A water flow energy damper, including a water well located between the inlet and outlet channels, a flow divider, characterized in that it is provided with flow damper made in the form of chambers, the inner surfaces of which are in the form of a truncated cone, mounted vertically in the well cantilever at the junction of the chambers with diffusers, the inlet sections of the diffusers are connected to the inlet channel, and the chambers are separated by a vertical wall along the length of the well, the lower end of the vertical wall has g rizontalnye shelves mounted by small bases of the truncated cones and middle portion overlying the well area, wherein the height of the chambers is at least half the height of the well.

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