CN202416273U - Energy dissipation pore plate for flood discharge tunnel - Google Patents
Energy dissipation pore plate for flood discharge tunnel Download PDFInfo
- Publication number
- CN202416273U CN202416273U CN2012200106981U CN201220010698U CN202416273U CN 202416273 U CN202416273 U CN 202416273U CN 2012200106981 U CN2012200106981 U CN 2012200106981U CN 201220010698 U CN201220010698 U CN 201220010698U CN 202416273 U CN202416273 U CN 202416273U
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- annular
- ring
- peritreme
- edge
- pore plate
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Abstract
The utility model discloses an energy dissipation pore plate for a flood discharge tunnel. The energy dissipation pore plate comprises a pore plate ring with a concrete annular structure; the pore plate ring is composed of a base ring and an annular pore edge arranged in the middle of the inner ring surface of the base ring; the section shape of the annular pore edge consists of a right trapezoid and a right triangle; a transition arc structure is arranged at the vertex angle of the right triangle; the ratio of the width of the top edge of the right trapezoid to the inner diameter of the annular pore edge is 0.19-0.2; the top and bottom of the annular pore edge are located at the joint with the inner ring surface of the base ring, and a vent hole and a drain hole are axially formed respectively; a bushing block ring made from chromium white cast iron is buckled on the edge side of the annular pore edge; and the inner and outer ring surfaces of the bushing block ring are consistent with the transition arc in radian. The energy dissipation pore plate disclosed by the utility model has the advantages that: the flood discharge tunnel for temporary flood discharge in the construction period is reconstructed into a permanent flood discharge tunnel to achieve the aims of saving the investment and shortening the construction period. The water flow suddenly contracts and suddenly disperses when passing through the orifice of the pore plate ring to form a shear flow in strong turbulence to realize energy dissipation in the tunnel.
Description
Technical field
The utility model relates to hydraulic engineering has the pressure flood discharging tunnel, especially relates to the energy-dissipation orifice plate that is used for flood discharging tunnel.
Background technology
In the Large Hydro-Junction engineering that with the local material dam is dam type,, usually need arrange many flood-discharge tunnels according to the requirement of flood discharge scale.Utilize Diversion Tunnel (it is just discarded to build up the back at the dam body) reconstruction of interim flood discharge of construction period to be permanent flood discharging tunnel, not only can reduce investment outlay, the reduction of erection time, can also solve the difficult problem that to arrange many flood discharging tunnels because of the landform restriction.But; The service condition of Diversion Tunnel is flood discharge when hanging down reservoir level; And therefore permanent generally flood discharge when high reservoir level of flood discharging tunnel, becomes permanent flood discharging tunnel at first need solve the technical problem of the high speed silt carrying flow of generation under the high water head to the hydro-structure erosion attack by reconstruction of diversion tunnel.The concrete structure annular slab (abbreviation orifice) of internal diameter less than its footpath, hole is set in flood discharging tunnel; Sudden contraction and diffusion suddenly when utilizing current to pass through the aperture of orifice, the shear flow that forms strong turbulent fluctuation carry out that energy dissipating is one of approach that addresses the above problem in the hole.Bump, the downstream face that the orifice upstream face directly bears high-velocity flow then is in current and is prone to the cavitation and cavitation erosion zone, and orifice peritreme place very easily erosive wear destroy.How to address the above problem, be this area scientific research personnel's research topic.
Summary of the invention
The utility model purpose is to provide a kind of satisfy energy dissipating and the energy-dissipation orifice plate that is used for flood discharging tunnel that prevents that cavitation two aspects from requiring.
For realizing above-mentioned purpose, the utility model can be taked following technical proposals:
The described energy-dissipation orifice plate that is used for flood discharging tunnel of the utility model comprises the orifice of concrete annular structure; Said orifice is made up of basic ring and the annular peritreme that is arranged on said basic ring inner ring surface middle part; The cross sectional shape of said annular peritreme is made up of right-angled trapezium and right-angled triangle; The top margin of said right-angled trapezium is connected with a right-angle side of said right-angled triangle, and the hypotenuse of right-angled trapezium is connected with another right-angle side of right-angled triangle; The drift angle of right-angled triangle is the transition arcs line structure; The width of right-angled trapezium top margin is 0.19-0.2 with the ratio of the internal diameter of annular peritreme; Be positioned at and basic ring inner ring surface joining place at annular peritreme top and bottom, offer steam vent and drain hole vertically respectively; Rim fastening along annular peritreme has the bush ring of being processed by Cr series white cast iron, and the inside and outside anchor ring of said bush ring is consistent with said transition arcs bank degree.
Said bush ring is combined by the polylith lining; Inner surface at every lining all has many grooves; The two ends of every lining are connected with fixation steel plate through bolt respectively; The steel bar stress welding of fixedly reinforcing bar and the annular peritreme of described fixation steel plate through being welded on its back side is fixing; Between the rim upper surface of bush ring inner ring surface and annular peritreme, be filled with the epoxy mortar tack coat.
The interior top rake of said annular peritreme, that is: the end right-angle side of said right-angled triangle and the angle a between the hypotenuse are 28 °-31 °.
The utility model advantage is that the reconstruction of diversion tunnel with interim flood discharge of construction period is permanent flood discharging tunnel, with realize reducing investment outlay, the reduction of erection time purpose.Through the energy-dissipation orifice plate of the said structure of the utility model is installed in Diversion Tunnel, sudden contraction and diffusion suddenly when utilizing current to pass through the aperture of orifice, the shear flow that forms strong turbulent fluctuation carries out energy dissipating in the hole; Simultaneously, solved annular peritreme downstream cavitation and cavitation erosion problem; Rim fastening along annular peritreme has the bush ring of being processed by Cr series white cast iron; And bush ring is arranged to combined by the polylith lining, not only improve peritreme place erosion resistance mill greatly, decreased damage capability, simultaneously; When the bush ring local damage, can the monolithic lining be unloaded replacing through bolt.
Description of drawings
Fig. 1 is that the said orifice of the utility model is arranged in the structural representation in the flood discharging tunnel.
Fig. 2 is that the A-A of Fig. 1 is to structural representation.
Fig. 3 is the H portion enlarged diagram of Fig. 1.
Fig. 4 is the I portion enlarged diagram of Fig. 3.
Fig. 5 is the sectional schematic diagram of the said bush ring of the utility model.
Fig. 6 is that the B-B of Fig. 5 is to structural representation.
The specific embodiment
Shown in Fig. 1-6, the said energy-dissipation orifice plate that is used for flood discharging tunnel of the utility model comprises the orifice of concrete structure; Said orifice is made up of basic ring 1 and the annular peritreme 2 that is arranged on said basic ring 1 inner ring surface middle part; As shown in Figure 3, the cross sectional shape of said annular peritreme 2 is made up of right-angled trapezium and right-angled triangle; The top margin of said right-angled trapezium is connected with a right-angle side of said right-angled triangle, and the hypotenuse 3 of right-angled trapezium is connected with another right-angle side 4 of right-angled triangle.The interior top rake of said annular peritreme 2; That is: the end right-angle side of said right-angled triangle and the angle a between the hypotenuse elect 30 ° as, this be because, though the inner edge top rake can improve the energy dissipating coefficient; But when interior top rake reaches more than 30 °; Its energy dissipating effect no longer includes large development, considers structural strength safety, so be chosen as 30
0As shown in Figure 4; The drift angle of right-angled triangle is transition camber line 5 structures; Because the rim of annular peritreme 2 is to the sensitive part of erosion; In order to protect peritreme, safeguard that its original build profile is very important, because the shape of jet necked-down section and cavitation, energy dissipating characteristic all depend on the appearance profile of peritreme not by erosion; For this reason; Fastening along the rim of annular peritreme 2 (that is: said transition camber line 5 constituted cambered surface) has the bush ring 8 by Cr series white cast iron KmTBCr26 (GB8263-87) cast molding, and the inside and outside anchor ring of said bush ring 8 is consistent with the radian of said transition camber line 5; For the ease of the installation and the replacing of bush ring 8, bush ring 8 is arranged to combined by the polylith lining; Inner ring surface at every lining all has many grooves 9; The two ends of every lining are connected with fixation steel plate 10 through bolt respectively; Said fixation steel plate 10 is fixing with the steel bar stress welding of annular peritreme 2 through the fixedly reinforcing bar 11 that is welded on its back side; Between the rim upper surface of bush ring 8 inner ring surfaces and annular peritreme 2, be filled with epoxy mortar tack coat 12.Like Fig. 2, shown in 3, for taking into account energy dissipating and safety of structure two aspects, the width L of said right-angled trapezium top margin selects in the 0.19-0.2 scope with the ratio of the inside diameter D of annular peritreme 2.As shown in Figure 1, be positioned at and basic ring 1 inner ring surface joining place at annular peritreme 2 tops and bottom, offer steam vent 6 and drain hole 7 vertically respectively, when being used for the flood discharging tunnel water-filling in the hole in air from upstream row remove and flood discharging tunnel when overhauling with water emptying at the bottom of the hole.
Claims (3)
1. energy-dissipation orifice plate that is used for flood discharging tunnel comprises the orifice of concrete structure; It is characterized in that: said orifice is made up of basic ring (1) and the annular peritreme (2) that is arranged on said basic ring (1) inner ring surface middle part; The cross sectional shape of said annular peritreme (2) is made up of right-angled trapezium and right-angled triangle; The top margin of said right-angled trapezium is connected with a right-angle side of said right-angled triangle, and the hypotenuse of right-angled trapezium (3) is connected with another right-angle side (4) of right-angled triangle; The drift angle of right-angled triangle is transition camber line (a 5) structure; The width of right-angled trapezium top margin (L) is 0.19-0.2 with the ratio of the internal diameter (D) of annular peritreme; Be positioned at and basic ring (1) inner ring surface joining place at annular peritreme (2) top and bottom, offer steam vent (6) and drain hole (7) vertically respectively; Rim fastening along annular peritreme (2) has the bush ring of being processed by Cr series white cast iron (8), and the inside and outside anchor ring of said bush ring (8) is consistent with the radian of said transition camber line (5).
2. according to the said energy-dissipation orifice plate that is used for flood discharging tunnel of claim 1, it is characterized in that: said bush ring (8) is combined by the polylith lining; Inner surface at every lining all has many grooves (9); The two ends of every lining are connected with fixation steel plate (10) through bolt respectively; Described fixation steel plate (10) is fixing with the steel bar stress welding of annular peritreme (2) through the fixedly reinforcing bar (11) that is welded on its back side; Between the rim upper surface of bush ring (8) inner ring surface and annular peritreme (2), be filled with epoxy mortar tack coat (12).
3. according to claim 1 or the 2 said energy-dissipation orifice plates that are used for flood discharging tunnel, it is characterized in that: the interior top rake of said annular peritreme (2), that is: the end right-angle side of said right-angled triangle and the angle a between the hypotenuse are 28 °-31 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200106981U CN202416273U (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for flood discharge tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200106981U CN202416273U (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for flood discharge tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202416273U true CN202416273U (en) | 2012-09-05 |
Family
ID=46741052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200106981U Expired - Lifetime CN202416273U (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for flood discharge tunnel |
Country Status (1)
| Country | Link |
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| CN (1) | CN202416273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433863A (en) * | 2012-01-11 | 2012-05-02 | 黄河勘测规划设计有限公司 | Energy dissipation pore plate for spillway tunnel |
-
2012
- 2012-01-11 CN CN2012200106981U patent/CN202416273U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433863A (en) * | 2012-01-11 | 2012-05-02 | 黄河勘测规划设计有限公司 | Energy dissipation pore plate for spillway tunnel |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |
|
| CX01 | Expiry of patent term |