The spillway hydraulic structures

 

(57) Abstract:

The invention relates to hydraulic engineering and is designed to discharge water from the low pressure reservoir of small capacity. The spillway includes placed upstream of the waterworks vertical tubular wall, the bottom of which is connected to discharge pipe from the bottom of the pool, and located above the removable tip cap, which is made in the form of a disk with a folded down edges and provided with which the cone is placed on a Central rod attached to the disk. Which the cone is made in the form of a vertical cross at the Central terminal plates, fastened the lower disk, located perpendicular to the Central rod, provides a uniform distribution of flow across the section of a vertical tubular tip and prevents breakthrough of air in the head due to the artificially formed roll. If you raise the level of the upstream disk with turned down edges breakthrough eliminates air in the head, where a vacuum is created, which provides spillway in sustainable pressure mode. 1 C. p. F.-ly, 2 Il.

The invention relates to hydraulic engineering and can be used for the th located upstream of the structures of the vertical chamber, outlet pipe, the vertical part of which is installed inside the chamber, a flexible tube located coaxially within the vertical portion of the outlet pipe, bellows, float tank with calibrated tubes and caps [1]. However, he has a complex structure.

Closest to the proposed invention is the spillway containing placed upstream of a vertical tubular wall, the bottom of which is connected to the discharge pipe with the lower water, sealed the movable hood to the racks float and the duct, mounted on the tip [2].

The disadvantage of this spillway is a significant dynamic load during failure of the vacuum, causing vibration of structures, and a significant power vacuum pressure, to overcome which you want the float chamber of a large volume, which significantly increases the intensity.

The problem to which the invention is directed, is to create a spillway construction, simple in design and operating without dangerous dynamic loads.

The technical result from the use of the invention is expressed in Troubleshooting the result is achieved by in the spillway structure, comprising placed upstream of a vertical tubular wall, the bottom of which is connected to discharge pipe from the bottom of the pool, and located above the removable tip cap, the latter is in the form of a disk with a folded down edges and provided with which the cone is placed on a Central rod attached to the disc, and stratopause taper is provided in the form of a vertical cross at the Central terminal plates, fastened at the bottom of the lower disk, located perpendicular to the Central rod.

In Fig. 1 shows the spillway; Fig. 2 - section a-a in Fig. 1.

The spillway hydraulic structures includes button below dam 1 metal conduit pipe 2, a vertical tubular tip 3 which is located 4 hours with solid mounted at a height a=(0,2 - 0,3)d disk 5 of diameter D=(1,8 - 1,5)d with turned down edges 6 and the Central rod 7, which is fixed, which cone 8 with the additional resistance in the form of lower disk 9. Besides, the water levels upstream of 10.

The spillway operates as follows.

When lifting ur the aqueous tubular tip 3, and which cone 8 with the additional resistance in the form of lower disk 9 provides a uniform flow distribution over the cross section and excludes centered breakthrough of air in a vertical tube head 3 due to the artificially formed roll. In this case, the spillway operates as a Weir with a thin wall and labouriously flow without dangerous dynamic loads and vibrations.

With the further increase of the upstream level 10 flow smoothly changed to the maximum, and the disc 5 with turned down edges 6 breakthrough eliminates air in a vertical tube head 3, where a vacuum is created and provides a work surface in a stable pressure mode.

In the fall of the water level upstream of the 10 air flows under the bent down edge 6 and the vacuum breaks, but dangerous dynamic loads are absent, because concentrated breakthrough of air in a vertical tubular tip 3 excluded due to which cone 8 with the additional resistance in the form of lower disk 9, the discharge flow that smoothly changes from maximum to minimum.

Flow of water continues until the upstream level 10 will not let the underwater device, which allows to achieve stable discharge mode without dangerous dynamic effects with a smooth change of the flow rate from minimum to maximum.

1. The spillway hydraulic structures, including placed upstream of a vertical tubular wall, the bottom of which is connected to discharge pipe from the bottom of the pool, and located above the head of a removable cap, wherein the removable cap is made in the form of a disk with a folded down edges and provided with which the cone is placed on a Central rod attached to the disk.

2. The spillway under item 1, characterized in that cone, which is made in the form of a vertical cross at the Central terminal plates, fastened the lower disk, located perpendicular to the Central rod.

 

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