The input end of the tubular siphon spillway
(57) Abstract:Use: in the construction, tubular siphon spillway hydraulic structures. The inventive head contains the front and rear walls 1 and 2, made in the form of semi-cylinders of the pipe segment, and the side walls 3 of the two triangular elements 4 of a cylindrical curvature with equal angles, vertices, which are located at the intersection of the edges of the walls 1 and 2. Side 5 elements 4 are located on the generatrix of the cylinder. When working siphon spillway water enters the hole formed by the walls 1, 2 and 4 elements, and then through the syphon pipe is discharged into the lower reach. 2 Il. The invention is intended for use in hydraulic construction, in particular in the construction of flood siphon spillway dams ponds and reservoirs.The known method the tip of siphon spillway, including the top front wall of the half pipe and connected to her side of the quarter pipe wall (ABT. St. N 1538563, CL E 02 B 7/18. The input end of the siphon spillway).The disadvantage of this input tip is that the lower part of the input is not protected from the suction air is Hells pounds of siphon spillway over five meters.Known input end of siphon spillway, joined from lengths of pipe, the mating politicy which are cut at equal angles ("Method of manufacturing the input headroom tubular siphon spillways").This design input tip has several disadvantages. Because the structural elements are made from whole pieces of pipe after fit is a lot of waste source material. The semi-cylinders, joined in the middle part of the tip, have a curvature towards the inside of the socket and thereby exclude the part of the square of the input, thereby reducing its capacity.The closest technical solution is the input end of the tubular siphon spillway, including front and back panels, made in the form of semi-cylinders of the pipe section located at an acute angle concave faces toward each other, and side walls, each of which is made from a flat sheet of a triangular shape and attached the sides to the edges of the front and rear walls with the location of the vertex of the angle at the point of intersection of these edges ("Method of making water headroom tubular siphon spillways").This construction direction and under the power of the vacuum generating oscillations, causing vibration of the entire structure. For this same reason, the input tip has a low strength in the horizontal transverse direction.The width of the input end length constant and equal to the diameter of the used tubes. As a result, the taper of the socket is vertical and surface flow, suitable to the structure and having a horizontal orientation is forced in the input tip is to roll in a vertical direction. This causes a strong turbulence of the flow along the side walls with the formation of eddies and the inflow of large amounts of air, reducing the expense of construction. In addition, the presence of the bell only in the vertical direction causes for the formation of a required area of the suction flow to significantly increase the length of the front wall of the tip, but when this is removed the area of the suction from the beginning of the pipeline, as a result growing the hydraulic losses due to the length of the tip, increasing its flow resistance and decreases the transmission power.The aim of the invention is to increase the strength and bandwidth of the input end of the siphon spillway.This objective is achieved in that the form equal angles, peaks which are located at the intersection of the edges of the front and rear walls, and side elements attached to the edges of the front and rear walls, are located on the generatrix of the cylinder.In contrast to the known technical solutions, in which the side walls are made from flat sheets of a triangular shape, in the proposed design input end of each side wall is made in the form of two elements of the cylindrical curvature of a triangular shape with equal angles, vertices, which are located at the intersection of the edges of the front and rear walls, and side elements attached to the edges of the front and rear walls, are located on the generatrix of the cylinder.These symptoms are new, as it does not coincide with the known shape and the achieved result.Run each side of the input end of the two elements of cylindrical curvature allows us to give the other side a positive curvature, thus increasing their stiffness and strength of the tip in the horizontal direction. The application of the side walls of the two elements of cylindrical curvature increases compared to the prototype area of the absorption by about 60% or decreases the length of vanaprasthi, and the width of the sucked flow increases to two times.The above properties show signs of the claimed technical solution, allow to conclude that compliance with a criterion of "significant differences".In Fig. 1 shows the structure of an input cap, side view; Fig. 2 - the same, top view.The input end of the tubular siphon spillway (Fig. 1) includes 1 front and 2 rear wall, made in the form of semi-cylinders of the pipe section located at an acute angle concave faces toward each other, and side walls 3, each of which docked two elements of the cylindrical curvature of the triangular form 4. The 5 elements 4 attached to the edges of the front 1 and rear 2 walls are located on the generatrix of the cylinder, and the mating sides 6 are located at equal angles "" to the same generatrix.The device operates as follows. When the water level rises in the reservoir, the stream flowing through the siphon spillway, makes the air out and creates a vacuum. The input tip distributes the vacuum area of the inlet, thereby creating a suction force of siphon spillway. Due to the convexity of the front is his force of atmospheric pressure without deflection and vibration design which greatly increases its strength. The increased strength also contributes to the fact that the sides 5 are adjacent to the edges of the front and rear walls at right angles, forming four corner profile with high resistance in the perception of stress.When the absorption of a suitable flow of water height position of the front 1 and rear 2 walls provides capture of flow depth, and the planned location of the side walls 3 provides capture of the stream width. The width of the captured stream is approximately two times greater than its depth.The claimed design input end of the tubular siphon spillway due to krivolineynoe all walls design and education longitudinal angular profiles at their dock has a higher stiffness and strength and thereby eliminates the possibility of vibration of structures due to the instability of the design of the entrance.Application in the design of the input side walls of the two elements of cylindrical curvature can significantly increase the area of the entrance and the width of the tip. This in turn reduces the overall length of the tip, to bring the area of suction to the conduit structure and thereby reduce the hydraulic is reset, twice its depth, allowing for normal hydraulic approach flow to the building it without the formation of turbulent jets and suction air, reducing the expense of the spillway.The above hydraulic properties of the claimed design input cap increase its throughput compared to the prototype.The proposed solution allows to exclude from the design water head flat sheet and make all abutting elements only from the pipe, which makes the manufacturing process, the input tip is more adaptable.The claimed design input tip can be used as a model satisfying all the requirements for the entrance of the siphon spillway.(56) USSR Author's certificate N 1431400, CL E 02 B 7/18, 1986.USSR author's certificate N 1448780, CL E 02 B 7/18, 1985. The INPUT END of the TUBULAR SIPHON SPILLWAY, including front and back panels, made in the form of semi-cylinders of the pipe section located at an acute angle concave faces toward each other, and side walls, each of which has a triangular shape and attached side is tives such as those that, to improve strength and throughput, each side wall is made in the form of two elements of the cylindrical curvature of a triangular shape with equal angles, vertices, which are located at the intersection of the edges of the front and rear walls, and side elements attached to the edges of the front and rear walls, are located on the generatrix of the cylinder.
FIELD: building, particularly to protect dams.
SUBSTANCE: method involves forming additional water spillaway channel including a number of self-flowing siphons passing over dam crest, wherein the siphons are assembled of prefabricated units which are delivered to dam when water in water pool reaches dangerous level; permanently installing short and long siphon necks are on the dam by positioning short neck of each siphon below water level in upper pool and by locating long neck thereof below water level in lower pool; assembling vacuum plant; connecting suction chamber of vacuum plant with uppermost siphon point by pipeline; evacuating the siphons and filling thereof with water.
EFFECT: provision of emergency water discharge over the dam and provision of water level reduction in water pool, prevention of scour creation and dam failure.
2 cl, 1 dwg
SUBSTANCE: invention refers to the hydraulic devices and can be used for dump of water from ponds, holding basins and water catchers. The device for dump and regulation of withdrawal depth from a holding basin includes tail vertical and horizontal channels, a slide and a stilling pool. For regulation of withdrawal depth, the tail vertical channel is closed by the external cylinder forming the additional tail external channel, placed according to the height of the top end over a height of water in a holding basin and through an aperture is communicating with atmosphere. The device has a screw drive for moving of the external cylinder on height with the flange fixed on bottom bead liquidating decompression funnel at an overflow of water in the tail external channel. The aperture for the communication with atmosphere is protected from pollution and freezing. Dependences on which constructive geometrical parameters of the device are calculated, the tail vertical and external channels, taking into account a migration of water in a holding basin, and an adjustable driving depth of the external cylinder in a holding basin are resulted. If the channels have out-of-round shapes, their sizes should correspond to the hydraulic radiuses equal to hydraulic radiuses of cylindricities of channels.
EFFECT: maintenance of dump of water from the middle layers of a holding basin, which are not polluted by floating substances.
SUBSTANCE: mobile hydropower structure with water-retaining filled shell attached to water flow bed with the help of bed anchors, installed along perimetre, includes generator, turbine, diffuser. At the same time water-retaining filled shell on top is enveloped with a siphon, which supplies water into lower reach to turbine with generator. Turbine is installed on mobile body, which represents a hollow reservoir with holes for installation of diffuser and removal of flow.
EFFECT: possibility to construct a temporary water utilisation system at waterways with considerable flow rate of bottom deposits for local power supply, irrigation, water supply, fish farming, and provision of confinement of forest fires spreading.
FIELD: power industry.
SUBSTANCE: invention relates to hydraulic engineering, specifically to creation of the water flow and its control using pipes to drive the hydraulic turbines, devices of water systems, and protection of fill dams against washaway. To create water flow the siphon is used, at its ends the gates are installed, and in its top point a hole is made closed by the tight plug. The siphon intake end is lowered in the source water reservoir, and drain end is inserted in beginning of the distribution pipe, its internal diameter is selected higher then outside diameter of the siphon pipe. For the water flow start gates are closed in series, the siphon is filled with water up to plug, hole is tightly closed by plug, and gates are opened. The created water flow is directed in the required or safe for people and environment direction via the distribution pipes, trays or other water ways. The dam protection against washaway (in case of the water overflow over the dam) is performed by means of the siphon gates opening and water overflow over the siphon installed on the dam crest. Method is ensured using the device containing siphon with controlled gates in input and output ends, and with hole in its top point closed by tight plug, distribution pipes, buffer or water discharge devices, trays and water ways. To ensure the required higher intensity of the water flow the single flows of several specified devices installed in common or different source water reservoirs or acting water flows are combined in common rather powerful flow.
EFFECT: possibility of increasing of energy power with significantly lower specific and absolute expenses, and fill dams protection against washaway upon threat of dam pond overfilling.
8 cl, 2 dwg
FIELD: machine engineering.
SUBSTANCE: device for discharge and regulation of water withdrawal depth from a sump includes a discharge vertical elongated bellows 8, a vertical branch pipe 4 in the form of a welded body and a horizontal channel 5, a valve 6 and a water well 7. The bellows 8 has an annular weir 9, connected in the upper part with a screw driver 10 of vertical movement, fixed in the desired position on the cover 11. The bellows 8 consists of rigid rings 12 and a pleated cover 13 of elastic material. The bellows 8 has a diameter larger than the diameter of the outlet horizontal channel 5. The device has an external fixed cylinder 14 with a flange 15. The fixed cylinder 14 comprises an external outlet channel 16, enclosed by a containment grate 17 (grid) fixed with rigid ties 18 to the welded body 4 and a horizontal retraction channel 5. Sediment retractor comprises a water outlet 21 equipped with a shutter 22 with a peak 23 which is connected by a hinge 24 to a change mechanism 25 of the valve 22 for moving the latter in height, in the lower part of the dam 1. The outlet end of the branch pipe 21 with the shutter 22 is located in an additional sediment closed water well 26 with a bottom opening 27 of the pipeline 28. The water well 7 is separated from an additional closed water well 26. If it is necessary to turn off the water, it will be sufficient to move the upper end of the bellows 8 with the weir 9 to the upper end position with the screw driver 10 and fix it. The formation and transportation of the sediment flow occurs actively around the water intake external outlet channel 16 and the fixed cylinder 14 with the flange 15 and the grid 17. As a result of this process, the discharge of the stream from the cleaner layers of reservoirs 19 is constantly stabilizing, which allows increasing the level of environmental safety of external reservoirs.
EFFECT: increased reliability, efficiency and uninterrupted operation of the device.
7 cl, 1 dwg