SU1222748A1 - Apparatus for varying the structure of stream at expansion portion - Google Patents

Description

The invention relates to hydraulic engineering and can be used in areas of expansion of annealing chamber in the operated pumping stations of irrigation systems, as well as in pumping stations of household and drinking purposes and thermal power plants.

The aim of the invention is to improve the uniformity of flow distribution and ease of operation.

FIG. 1 shows an avant-chamber of a pumping station with a device for changing the flow structure located in the expansion section of the anankamer; in fig. 2 shows a device for changing the flow pattern, a transverse section.

The device for changing the flow structure includes a transverse wall 1 arcuate in plan, located on the expansion section 2 of the anankamers 3 of the pump station 4 and directed to the side

the surface layers of the flow with a depth of loading equal to 0.1-0.3 of the maximum filling height of the anankamer 3 at the location of the wall 1.

The transverse wall 1 is made in terms of an arc-shaped arc with an angle equal to the angle of expansion of the advance chamber 3. To simplify the technology in the manufacture of wall 1, its shape can be changed to polygonal, i.e., broken in plan.

The device works as follows.

The flow of water entering the expansion section 2 of the avant-chamber 3 of the pumping station 4 encounters an obstacle in its path — a transverse arcuate wall 1 in plan and flows around it; equal to the angle of expansion of the area 2 of the advance chamber 3, the streamline current of the water flow spread. The transverse wall 1 is attached - 20 lag behind wall 1 parallel to the side

to pontoons 5 and fixed relative to the side walls of section 2 by means of extensions 6 on anchor fasteners. Experimental studies of the pockets of section 2, which ensures the uniform distribution of the flow across the width of the avankeamer 3.

A device for changing the structure of

It was noted that it is most efficient to perform 25 currents, due to its buoyancy, an automatic transverse wall 1 of a length equal to 0.3-0.4 of the width of the avant-chamber 3 at the end of extension 2, and set at a distance from the beginning of extension 2, equal to 0.37 0.45 extension length 2, in

It provides the necessary flow spreading regardless of the fluctuations of the water level in the avancamer 3 and does not require stopping the units of the pump station 4 when installing the device in existing facilities.

Editor O. Yurkovetskaya Order 1676/28

Compiled by P. Gordienko Tehred I. VeresKorrektor I. Erdeyi

Circulation 641Subscribe

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Filia.p PPP "Patent, Uzhgorod, st. Project, 4

surface layers of the flow with an immersion depth equal to 0.1-0.3 of the maximum filling height of the anankamer 3 at the location of the wall 1.

The transverse wall 1 is made in terms of an arc-shaped arc with an angle equal to the angle of expansion of the advance chamber 3. To simplify the technology in the manufacture of wall 1, its shape can be changed to polygonal, i.e., broken in plan.

The device works as follows.

The flow of water entering the expansion section 2 of the avant-chamber 3 of the pumping station 4 encounters an obstacle in its path — a transverse wall 1 arched in plan and flowing around it, while the streamlines are normally located to the vertical convex surface of wall 1. Since the angle of expansion of section 2, anankamers 3, the streamlines of the water flow are located behind wall 1 parallel to the side

lag behind wall 1 parallel to side

to the walls of section 2, which ensures uniform distribution of the flow across the width of the advance chamber 3.

The device for changing the flow structure due to its buoyancy of the automatic flow due to its buoyancy automatically ensures the necessary flow spreading regardless of the fluctuation of the water level in the avant-chamber 3 and does not require stopping the units of the pumping station 4 when installing the device in existing facilities.

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Figg

Claims (1)

DEVICE FOR CHANGE- “NII FLOW STRUCTURE AT THE PLOT EXPANSIONS mainly of the anvil chambers of the pumping station, including a transverse wall arched in plan view, convex towards the expansion direction, characterized in that, in order to increase the uniformity of flow distribution and ease of use, the device is equipped with pontoons, and the transverse wall is attached to the pontoons, made length equal to 0.3-0.4 width of the fore chamber at the end of the expansion section, and installed at a distance from the beginning of the expansion section equal to 0.37—0.45 length of the expanded section in the surface layers of the flow with an immersion depth equal to 0.1-0.3 of the maximum height of the filling of the fore chamber in the wall alignment q. - FIG. ι ju yu QO