SU866030A1 - Disphragm dam - Google Patents

Description

(54) MEMBRANE DENSITY

one

The invention relates to hydraulic construction and can be used on waterways with uneven runoff as a water supporting structure, carried out our regulation of the level of the upstream.

The known membrane dam, including a flexible pressure vessel, contains flexible connections with floats to regulate the upstream 1.

The disadvantage of this dam is the difficulty of adjusting the upstream.

A membrane dam is known, including successively installed shells with decreasing height, on the crests of which the floats 2 are mixed.

The disadvantage of this dam is the high cost of adjusting the upstream.

The purpose of the invention is to simplify the process of adjusting the headwater level.

The goal is achieved by the fact that the crests of the shells are connected by vertical communicating flexible connections equipped with travel stops, the lower shells having an additional float placed on the crest above the main float and connected to the latter by means of a flexible connection.

FIG. 1 shows schematically the proposed dam, general view; in fig. 2 - cross section at the admission of the settlement expense; in fig. 3 - the same, when skipping increased consumption.

The membrane dam consists of an elastic shell 1, fixed with a lower edge to the base 2 and provided in the upper

tQ parts of the float 3, ensuring the rise of the crest of the shell. The float 3 is connected by means of cables 4, passing to the downstream in channels 5 along guide elements 6, with float 7 having the same dimensions as the float 3 and installed

Claims (2)

15 on the ridge of the shell 8 attached by the lower edge to the base 2. An additional float 10 is attached to the float 7 by means of a flexible link 9, and the length of the flexible link 9 is determined by the size of the overflow layer when the calculated flow rate passes. In order to ensure that the ridges of shells 1 and 8 are raised, the cables 4 are provided with stops 11 installed at a distance HI from the ridge of shell 8 {H | - the calculated height of the under ni shell 8). If float 3 and 7 are of the same size, -y-1.25, where H is the calculated height of shell 1. There is a gap 12 between floats 7 and 10. The dam works as follows. After installing the dam shells in the channel and fixing them to the base, as water enters the upstream ridge of the shell 1 under the action of the ejector,. ., the thrust force F generated by the float 3 begins to rise. In this case, the cables 4 are moved in the channels 5, slipping along the guide elements 6, in the direction of raising the ridge of the shell 1 until the stops 11 rest against the base 2. As a result, the position of the ridge of the shell 1 and the float 3 is fixed at the height H from the bottom of the stream, which is the calculated value of the level of the upstream. Further entry of water into the upper reach causes overflow of the stream to the lower reach and raising the ridge of the shell 8 together with the floats 7 and 10 to the calculated height H (determined by the length of the cables 4 from the stops 11 to the ridge of the shell 8. Thereafter the stream overflows the crests of shells 1 and 8 enter the downstream. In the case of passage of the design flow rate, the float 10 is on the surface of the flow, while there is no voltage in flexible connections x 9. This position of the structure creates an equal tension for the cables 4 as towards the upper , t in the case of an increase in the flow rate, the overflow layer rises over the ridges of shells 1 and 8. In this case, the float 10 is immersed in the flow, resulting in loads in flexible connections x 9 resulting from the action of the force Fj, which is by the buoyant force acting on the float 10. Under the action of this upward force, the ridge of the shell 8 also moves upwards, while the cables 4, moving along the guiding elements 6 in the channels 5 in the direction of movement of the ridge of the shell 8, lower the ridge of the shell 1. To result This increases the capacity of the facilities and there is a decrease in the level of the upper reach to the calculated value. As the flow rate decreases and its calculated value stabilizes, the overflow layer through the crests of shells 1 and 8 decreases. As a result, the float 10 is again on the surface of the stream, and the force Fj is zero, whereby the crest of shell 1 again rises by the calculated value H, and the cables 4 move in the direction of its movement until the stops 11 are pressed into the base 2 and the dam does not take a design position. The application of the proposed membrane dam on waterways with uneven drainage will simplify otsess headwater level control, eliminate floodwater yield calculated on security understand and erosion of the coast, would reduce operating costs. Claims of the invention: Membrane carp, comprising successively installed shells with decreasing flow height, on the crests of which floats are placed, characterized in that, in order to simplify the process of adjusting the level of the upper reach, the crests of the shells are connected by vertical interconnecting flexible connections equipped with limiters strokes, the lower shells having an additional float placed on the ridge above the main float and associated with the latter by means of a flexible link. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 618480, cl. E 02 B 7/02, 1977. 2. USSR author's certificate No. 675124, cl. E 02 B 15/00, 1978.