SU1608285A1 - Water stream energy damper - Google Patents

Abstract

The invention relates to hydraulic structures, in particular to the design of the water flow energy extinguisher in the end devices of the tubular and tunnel culverts. The purpose of the invention is to improve the uniformity of the distribution of unit costs across the width of the quencher and reduce bottom velocities in the stream. The energy absorber consists of a rectangular chamber open at the top, in the middle of the end wall 1 of which a hole is made for the inlet pipe 2. Inside the chamber there is a reflecting screen in the form of an L-shaped fence beam 3 rigidly embedded in the side walls of the chamber 4. Horizontal upper shelf visor beam 3 installed end to meet the water flow. Two trapezoidal cuts were made on the sides of the lower part of the collecting beam 3 located at the level of the bottom of the inlet pipe 2, the top of the output threshold 5 and the bottom of the diversion channel 6. The bottom of the chamber 8, the lower part of the collecting beam 3 and the side walls 4 form an opening. The lower central part of the vertical element of the collecting beam 3 between the trapezoidal notches is made with a visor 9, having a plan view of a triangle truncated on each side, with the apex of this visor 9 located on the axis of symmetry of the energy absorber and directed towards the water flow. The output threshold 5 is made with a horizontal shelf in the upper part. Owing to the impact of the jets in the chamber between the haul 3 and the inlet pipe 2, as well as before the exit threshold 5, the flow energy is extinguished, uniform distribution of the flow rates over the damper width and reduction of these velocities at the exit is achieved. 2 h.p.f. 3 il.

Description

The invention relates to hydraulic structures, in particular to the construction of a water jet energy extinguisher in terminal devices of closed tubular tunnel water intake facilities. The purpose of the invention is to improve the uniformity of the distribution of specific flow rates and reduce the Nondone flow rates.

FIG. 1 shows a water flow absorber along a plane of symmetry, a longitudinal section; in fig. 2 is a section L —A in FIG. one; in fig. 3 extinguisher, axon. Metri.

The water flow energy damper consists of a rectangular chamber open at the top, B in the middle of the end wall of which a hole is made for the supply pipe 2. Inside the chamber there is a spark-reflector in the form of an L-shaped collecting beam 3 rigidly embedded in the side plates of chamber 4. The horizontal top of the visor beam 3 is installed with an end facing the water flow. Two trapezoidal cutouts 7 are made on the sides of the lower part of the collecting beam 3 located at the level of the bottom of the inlet pipe 2. The top of the output threshold 5 and the bottom of the outflow channel 6 form the opening 8 of the chamber 8, the lower part of the collecting beam 3 and the side walls 4. . The lower center of the collecting beam 3 between trapezoidal notches 7 is engraved with a visor 9, which has a view of a triangle truncated at the sides, and the tip of the visor 9 is located in the plane of symmetry of the extinguisher and is directed towards the flow. The size of the protrusion of the visor 9 from the inner plane of the visor beam 3 on the sides is equal to C), () 45--0.53, and in the center is 0.08 0.09 broach of the extinguisher. The output threshold of chamber 5 is made with a horizontal shelf Ki in the upper part with a length of 0.09–0.13 г damper. The height of the lateral cTetiOK Kame}); 4 after the visor beam 3 decreases. On the upper border of the end wall 1 and the side walls 4 up to the visor beam:, a P. visor has been made. -asters of water flow energy with a diverting channel 6 to the side walls 4 n about ..

This exit threshold is 5 ppimikayut otkpg: - ....

The damper works in the following way. The stream of water that enters the extinguisher of the supply pipe 2 hits the vertical element of the collecting tank. 1ki 3 and spreads along it radially about; - zeit | and jet. The horizontal top flange of the collecting beam 3, the visor 9 and the side walls of the chamber 4 discard the spreading flow back to the opening G1 of the second pipe 2. At the same time, between the end cage of the chamber 1. The rear beam 3, the side walls of the chamber 4 and the bottom of the chamber 8 g: change of direction and movement of water, splitting and collision of vodka jets

of

thirty

WITH

flow into the energy absorber. In this part of the chamber nab;: a complex vortex motion of water, accompanied by intensive aeration of the colliding, is possible. 3, resulting in an effective quenching of the energy of the water flow. A visor I 1, located on the upper edge of the face 1 and the side 4 walls, prevents the formation of sprays outside the energy absorber. After that, the flow of water J moves the airway formed by the lower part of the collecting beam 3, the bottom of the chamber 8 and the side walls 4.

The presence of a visor 9 in the lower part of the collecting beam 3 prevents the vertical movement of the part of the flow reflected from the collecting beam 3 to the bottom of the chamber 8. The shape and dimensions of the goat; the light 9 is chosen in such a way that a more uniform distribution of the hydraulic resistance to the flow moving through the the hole under the visor beam 3 and the bottom of chamber 8, throughout the P1irine energy absorber. Zgo creates favorable conditions for leveling specific costs under the visor 3 across the ishrin dusk Pass under the visor 3, water flows into the second part of the chamber formed by the bottom of chamber 8, side walls 4 and output iioporoM 5. Upper horizons and shelf 10 output threshold 5 turns part of the water flow back to the beam 3. As a result, a collision occurs with a rue. Fill: 1: the head; energy supply and further HJCiiHC evenness of the distribution of the specific costs of the pyrine extinguisher.

In addition;), the presence of ebrat1K) th flow stream before the exit rodoi o.v; 5 decrease the bottom velocities of 1g; -: m and constitute a supernatural character of the movement of water after an energy extinguisher, ulu. —A hydraulic conditions of the diverting channel. 6 Trapezoidal notches 7 on the sides: the infrared part took the third ball 3. 3. E. - 1I must be required to wash the sediment from sediment and 1. which can fill

 Exhaust suppressor of the first flow, STATUSED CZ of the right-of-way output: 1th overhead camera with an output threshold. which, for the entire camera 1girina, is located

An echo reflector, made in the form of an L shaped visor beam, horizontally 1 tal the upper shelf of which is installed, butt towards the water flow, and lio to the sides of the lower part of the visor beam, loose; -1 at the bottom mark of the inlet pipe

and the top of the output threshold, two trapezoidal cuts are made, (which is due to the fact that with the r; the spruce of different inconsistencies is equal to the specific consumption ri; ri ;; irine | -acc .: and lowering the subliminal, 1x velocity

in the stream, in the lower central part of the Gyub-different visor beam, there is a visor between the trapezoidal notches, and the chamber output threshold in the upper part is provided with a horizontal shelf.

2. The damper according to claim 1, characterized in that the visor of the visor beam is made in plan in the form of a triangle truncated at its sides, whose apex is located in the plane of symmetry extinguish n and directed towards the flow, while the size of the visor from the inner plane of the visor beam at the sides equal to 0,045 - O 053, and in the center of 0.08-0.09 width of the quencher. 3. The damper on the PP. 1 and 2, characterized in that the horizontal shelf in the upper part of the output threshold is made 0.09-0.13 in length of the quencher.

FIG. i

five./

 / 2

6

eight

9

Fig.Z

Claims (3)

1. A water flow energy absorber, consisting of a rectangular chamber open at the top with an exit threshold, inside of which, over the entire width of the chamber, there is a reflector screen made in a Z-shaped shaped beam, the horizontal upper shelf of which is installed with its end facing towards the water flow, and two trapezoidal cuts, o; liable to that. In order to increase the uniformity of the distribution of unit costs and the width of the damper and reduce bottom velocities in the stream, a visor is made in the lower central part of the L-shaped sampling beam between the trapezoidal cutouts, and the exit threshold of the chamber in the upper part is equipped with a horizontal shelf. 2. The damper according to π. 1, characterized in that the visor of the sampling beam is made in plan in the form of a triangle truncated on the sides, the vertex of which is located 6 in the plane of symmetry of the damper and is directed towards the flow, while the size of the protrusion of the visor from the inner plane of the sampling beam on the sides is 0.045-0.053, and in the center of 0.08-0.09 the width of the damper. 5 3. The damper according to paragraphs. 1 and 2, characterized in that the horizontal shelf in the upper part of the output threshold is made with a length of 0.09-0.13 width of the damper.