SU1313948A1 - Arrangement for passing ice through hydraulic structure - Google Patents

Description

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The invention relates to hydrotechic IMC structures, namely, structures for the destruction and passage of ice through low-pressure waterworks during the operational period.

The purpose of the invention is to increase the reliability of work by increasing the efficiency of the destruction of ice.

FIG. 1 shows the construction of the length of the ice pass, top view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B of FIG. 2

CoO (the fishing consists of channel 1 with weir 2 and threshold 3.

Spillway 2 has barrels 4, splitting it into individual spans 5. Threshold 3 consists of weirs B and 7 alternating between each other across the width of channel 1. Weirs 6 have a front vertical edge and a back inclined edge, and weir 7 has front sloping face and rear vertical face.

Vertical faces of weirs 6 CMenies are relative to the vertical faces of weir 7 along the axis of channel 1.

The construction works in the following way.

When water flows between the weir 2 and the threshold 3, a free surface of a complex configuration is formed, which is formed under the influence of m auxiliary threshold 3, while the weir 7. having a downward slope to the flow, contributes to a sharp drop in the water surface due to an increase in speed

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and the formation of a vacuum beyond the vertical edge, i.e. in this case, weir 7 works like a vacuum weir, whose discharge coefficient is higher than that of others. Under the influence of weirs, at first, there is no sharp decline, as the flow hits the vertical faces of weirs, its energy is somewhat damped, and then it hits the inclined faces, i.e. the weir b works like a vacuum-free weeler Bbi, in which the flow coefficient is smaller than that of the vacuum ones. Thus, in the BB section, two alloy curves are formed, between which the ice strips occur. As the flow moves downstream, the picture changes. Increasing the flow rate on the sloping faces of the weirs b results in a decrease in depth along them. Below the spillway 7, H15,; | and: o11, egos. With a lot of weir, energy ranjeHHe occurs, and since it is 1 with a full-weirout, the helix -jHCpriiK is accompanied by pressure recovery, which leads to an increase in level. Thus, the B section of the B – C section, as well as the section B – B, forms two decay curves, but differs from the spas; ia sections of the BB section. In that case, when the other {(C :, ia 1: 1zhny s.loss v; 1dda turned out to be high and the fracture of the y-bar in section B-B is not npoH3onj / io, oh and the decomposition is in sections-1; and B-B, о ehozhden1G1-: which are in the stretched state are the top layers of ice. KOTOpjjie, as a rule, in the spring pepno.i had a significant, lesser strength than the one –1th, due to the action solar radiation and heat radiation) in () health radiation positive TeM iefiaTvp air.

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Claims (1)

STRUCTURE FOR ICE-PASSING THROUGH HYDRAULIC STRUCTURE, containing an open channel with a spillway and a threshold located in front of the spillway, characterized in that, in order to increase the reliability by increasing the efficiency of ice destruction, the threshold is made in the form of two groups of spillways alternating between each other along the width of the channel moreover, the weirs of one group have an inclined front face and a vertical back face, the weirs of the other group have a vertical front side and an inclined back side, and the vertical faces of the weirs of one g uppy offset relative to the vertical edges of another group of weirs along the channel axis. (L DOF Ф0 with © QO of FIG. 1