SU1335817A1 - Water meter for open river course - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering and is intended for the operational control and accounting of the flow rates of water in open channels. The purpose of the invention is to simplify the determination of water flow. The water meter consists of a spillway 1 installed in the channel 4 with holes 8. In the upstream 2 a rail 10 is placed to determine the water head. The flow of water passing through the channel 4 is divided into two parts. One part passes over tip 7, and the other goes through holes 8. The interaction of these parts on spillway 6 ensures the constant flow coefficient of water through weir 1, which makes it easier to determine the flow rate of water passing along the channel 4. 1 c. lts, 3 ill. S (L with so O1 oo

Description

FIELD OF THE INVENTION The invention relates to hydraulic engineering and is intended for use on KoiiTpo. iH and water accounting for open channels.

The purpose of the invention is to simplify the consumption of water.

Fig, 1 shows an open channel with a water meter, a longitudinal vertical section; on fi1. 2 - view A on fi 1; on phi1 3 type B on phi1. one.

The water meter contains water flow; in 1, it is located between the upper reach 2 and the lower reach 3 in the channel 4. The water flow 1 has a pressure vertical rpaisb 5, orientation) () - bath towards the upper reach 2, inclined water () The left side b, located at an angle of 15-20 ° to horizontal, and horizontal tip 7. In the body of the weir, horizons are filled: 1 longitudinal holes 8, one below the other R two horizontal rows, the distance between the edges of adjacent holes 8 and between the edges of the openings 8 and the ribs 9 of the nap (the five-sided face 5 is 2, i3-2.7 diameter holes 8. In the upstream 2, a vertical gauge rail 10 is installed at a distance of NII N from the nano face 5. Where But the full water pressure is. Rake 10 may have two scales, one of which indicates water nano, and the flow is on the second. Water s Q. Instead of a slat 10, a water level recorder can be installed.

Water meter works as follows;

Pressure face 5 creates a partial flow of water in the upstream 2, which then splits into two parts during its movement, one part (transit) flows over the head 7 and moves over the overflow face 6 into the downstream 3 and the other over through weep holes 8 also falls on the spillway 6. Joint

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ten

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thirty

35

the action of the two previously divided parts of the water flow creates a ..- 1 dynamic equilibrium, which, with the specified geometry of the water meter, leads to a constant flow coefficient.

If the value of the flow coefficient m is 1 constant and:) avna tX 0.44 X eonst, the acceleration of gravity g is 9.81 m / s - const is also a constant value, taking into account that for each particular case the width of the VODSLIVN01-0 hole is also constant, the formula of water flow Q mb 2gH takes the form Q, where, 44 / 19,62; b weir width 1.

So, for example, for a drain hole with a single ir 10 L 10 m flow rate, flow through channel 4, is determined by the formula

Claims (2)

1. Water meter for an open channel, including a spillway with an inclined and vertical face and a horizontal ridge, located between the head and 1 LIFE of the channel, characterized in that, in order to determine the flow rate of the water, the water supply system c. The iHB is oriented with a vertical edge toward the upper reach, and in its body there are Hiji horizontal longitudinal holes spaced from one node to the other in two horizontal rows, with the distance between the edges of adjacent holes and also between edges from the nose and edges of the nano g a) make up 2.3--2.7 diameters of the hole and. 2. Water meter but n. 1, characterized in that the spillway is 1, the face is located at an angle of 15--20 ° to the horizon. FIG. g View b Phi2.: 5 (, e) press down, 1b .- H. Sergeev Editor N. Tyi ItsHGehrel I. VeresKorrektor. Reshetnik Order 37.98 35T: -; rage 693Subscription VNIIPI rocv. iai CTiiCHiioi i) i.v: iiTci a I C.C .l no le. 1a ..; invented by l. and:) tkratin l. i (l3.T, AlocKiia. J.). 5. Raushsk nab. D. 4, 5 (1ДСТ1и 1111 ;; - po.- | games; and | 11Г11 sk -:} g. Iii ;; iri e. I. zhgo |) od. y, - |. Design. -one