CN203307784U

CN203307784U - Pressurized-water erosion reduction structure of release structure

Info

Publication number: CN203307784U
Application number: CN2013203699413U
Authority: CN
Inventors: 戴晓兵
Original assignee: Hydrochina Zhongnan Engineering Corp
Current assignee: PowerChina Zhongnan Engineering Corp Ltd; Hydrochina Zhongnan Engineering Corp
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2013-11-27
Anticipated expiration: 2023-06-26

Abstract

The utility model provides a pressurized-water erosion reduction structure of a release structure. The pressurized-water erosion reduction structure comprises a communicating pipe which is buried inside the release structure, wherein the inlet end of the communicating pipe is externally connected with pressurized-water equipment; the outlet end of the communicating pipe is communicated with an overflow wall surface of the release structure; the outlet end of the communicating pipe is provided with a flat orifice. By adopting the pressurized-water erosion reduction structure, a low-velocity water body can be injected into the bottom of a high-velocity area of the overflow wall surface, so that a low-velocity area is formed between the overflow wall surface and high-velocity flow; the high-velocity flow can not directly act on the overflow wall surface; meanwhile, the high-velocity flow and the low-velocity water body generate shearing, mixing and entrainment effects; a large amount of flow kinetic energy is dissipated; the bottom velocity of the high-velocity flow is reduced; the flow cavitation is restrained; a cavitation erosion damage and an erosion attack are reduced.

Description

A kind of setting-out corrosion inhibitor structure of outlet structure escape works

Technical field

The utility model relates to a kind of setting-out corrosion inhibitor structure of outlet structure escape works, specifically a kind of to the low flow rate water body of outlet structure escape works high-velocity flow bottom pressure injection, reduces the bottom velocity of high-velocity flow, suppresses flow cavitation, the structure of deduction and exemption cavitation erosion and erosion attack.

Background technology

Under the effect of high-velocity flow, cavitation erosion and erosion attack easily occur in the concrete surface of outlet structure escape works, even outlet structure escape works are brought to fatal harm, and cavitation corrosion and erosion attack happen occasionally on outlet structure escape works.

At present, air entraining facilities usually is set on the high-velocity flow outlet structure escape works, utilizes the effect of dragging of current on air entraining facilities that Air Entrainment is entered to water body.The current aeration can block the growth of hole bubble and the process that crumbles and fall effectively, and the current aeration can be reduced or remitted cavitation erosion, but can not reduce or remit erosion attack.Therefore need a kind of bottom velocity that can reduce high-velocity flow of design, suppress flow cavitation, the structure of deduction and exemption cavitation erosion and erosion attack.

The utility model content

Problem and shortage for the existence of air mixing corrosion reducing facility, the utility model provide a kind of active, to the setting-out corrosion inhibitor structure of the low flow rate water body of high-velocity flow bottom pressure injection, reduce the bottom velocity of high-velocity flow, suppress flow cavitation, deduction and exemption cavitation erosion and erosion attack.

In order to achieve the above object, the technical scheme that provides of the utility model is:

The setting-out corrosion inhibitor structure of described outlet structure escape works comprises the communicating pipe that is embedded in outlet structure escape works inside; The external water compressing equipment of described communicating pipe entrance point; Described communicating pipe, the port of export was communicated with the overcurrent wall of outlet structure escape works; The port of export of communicating pipe is the tabular aperture, is preferably flaring tabular aperture.

Wherein, described communicating pipe is steel pipe or concrete reinforced pipe, or other pipelines.Described water compressing equipment is water pump or head-tank, but or the device of other pressure injection current.Described outlet structure escape works are provided with sluice gate, the opening/closing system interlock of described water compressing equipment and sluice gate.

The utility model is described in further detail below in conjunction with accompanying drawing and principle:

Referring to Fig. 1 and Fig. 2, when sluice gate 9 is opened, the current overcurrent wall 7 of flowing through, form high-velocity flow district 5, water compressing equipment 4 by communicating pipe 1 to the high-velocity flow district 5 bottom pressure injection low speed water, make between 5 bottoms, high-velocity flow district and overcurrent wall 7 to form low speed water district 6, thereby high-velocity flow can not be acted directly on overcurrent wall 7; High-velocity flow and low flow rate water body produce and shear, entrainment and the blending effect simultaneously, a large amount of water flow dynamic energy dissipates, reduce the bottom velocity of high-velocity flow, thereby improve flow-shape and the pressure distribution of overcurrent wall, improve the cavitation number of current, suppress flow cavitation, reach the cavitation erosion of deduction and exemption current and the purpose of erosion attack; Wherein, the speed of the low speed water of pressure injection is much smaller than the speed of high-velocity flow district current.

The accompanying drawing explanation

Fig. 1 is the structural representation of communicating pipe in the utility model structure;

Fig. 2 is the sectional view of the utility model structure.

In figure: 1, communicating pipe; 2, the port of export; 3, entrance point; 4, water compressing equipment; 5, High Velocity Area; 6, low flow velocity district; 7, overcurrent wall; 8, outlet structure escape works; 9, sluice gate.

The specific embodiment

Embodiment 1

Referring to Fig. 1 to Fig. 2, the setting-out corrosion inhibitor structure of described outlet structure escape works comprises the communicating pipe 1 that is embedded in outlet structure escape works 8 inside; The external water compressing equipment 4 of described communicating pipe 1 entrance point 3; Described communicating pipe 1, the port of export 2 was communicated with the overcurrent wall 7 of outlet structure escape works 8, and the port of export 2 of communicating pipe 1 is flaring tabular aperture, and described communicating pipe 1 is steel pipe; Described water compressing equipment 4 is water pump.Described outlet structure escape works 8 are provided with sluice gate 9, and described water compressing equipment 4 links with the opening/closing system of sluice gate 9.

The sluicing width of described outlet structure escape works 8 is 5m, and described communicating pipe 1 is steel pipe, and diameter is consistent with the import and export diameter of outer water pump 4, is 650mm; Water pump 4 adopts mixed flow pump, water supply flow 1.0 m ³/ s, lift 5.5m; The described steel pipe port of export 2 shape of cross sections are flat rectangle aperture, clear span 5m, clear height 0.2m, aperture outlet flow rate of water flow 1.0m/s; Communicating pipe, the port of export was not more than 30m/s with the flow rate of water flow that the overcurrent wall is communicated with position.

Claims

1. the setting-out corrosion inhibitor structure of outlet structure escape works, is characterized in that, it comprises the communicating pipe (1) that is embedded in outlet structure escape works (8) inside; The external water compressing equipment of entrance point (3) (4) of described communicating pipe (1); The port of export (2) of described communicating pipe (1) is communicated with the overcurrent wall (7) of outlet structure escape works (8), and the port of export (2) of communicating pipe (1) is the tabular aperture.

2. setting-out corrosion inhibitor structure as claimed in claim 1, is characterized in that, the port of export (2) of communicating pipe (1) is flaring tabular aperture.

3. setting-out corrosion inhibitor structure as claimed in claim 1, is characterized in that, described communicating pipe (1) is steel pipe or concrete reinforced pipe.

4. setting-out corrosion inhibitor structure as claimed in claim 1, is characterized in that, described water compressing equipment (4) is water pump or head-tank.

5. setting-out corrosion inhibitor structure as claimed in claim 1, is characterized in that, described outlet structure escape works (8) are provided with sluice gate (9).

6. setting-out corrosion inhibitor structure as claimed in claim 5, is characterized in that, described water compressing equipment (4) links with the opening/closing system of sluice gate (9).