CN102433863A - Energy dissipation pore plate for spillway tunnel - Google Patents
Energy dissipation pore plate for spillway tunnel Download PDFInfo
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- CN102433863A CN102433863A CN2012100072778A CN201210007277A CN102433863A CN 102433863 A CN102433863 A CN 102433863A CN 2012100072778 A CN2012100072778 A CN 2012100072778A CN 201210007277 A CN201210007277 A CN 201210007277A CN 102433863 A CN102433863 A CN 102433863A
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- ring
- peritreme
- annular
- edge
- pore
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Abstract
The invention discloses an energy dissipation pore plate for a spillway tunnel, comprising a pore plate ring with a concrete ring-shaped structure; the pore plate ring consists of a base ring and a ring-shaped pore edge arranged in the middle of the inner ring surface of the base ring; the shape of cross section of the ring-shaped pore edge consists of a right trapezoid and a right angled triangle; the top angle of the right angled triangle is a transition arc structure; the ratio of the width of the top edge of the right trapezoid to the inner diameter of the ring-shaped pore edge is 0.19-0.2; and an air discharge hole and a water discharge hole are respectively arranged on the joint of the top of the ring-shaped pore edge and the inner ring surface of the base ring and the joint of the bottom of the ring-shaped pore edge and the inner ring surface of the base ring, in the axial direction; and a lining ring made from the chromium white cast iron is fastened along the edge of the ring-shaped pore edge, and the inner ring surface and the outer ring surface of the lining ring are accordant with the radian of the transition arc. The energy dissipation pore plate has the advantages that the aims of saving investment and shortening work time can be realized by the means that a diversion tunnel which is used for temporarily discharging the flood in the construction time is rebuilt to be a permanent spillway tunnel. The energy in the spillway tunnel can be dissipated by the strong turbulent shear flow which is formed by the sudden contracting and dispersing when water flow passes through the pore of the pore plate ring.
Description
Technical field
The present invention 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 object of the invention 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 present invention can take following technical proposals:
The energy-dissipation orifice plate that is used for flood discharging tunnel of the present invention 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 and said transition arcs bank degree are consistent.
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 invention has the advantages 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 structure according to the invention 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 orifice according to the invention 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 bush ring according to the invention.
Fig. 6 is that the B-B of Fig. 5 is to structural representation.
The specific embodiment
Shown in Fig. 1-6, the energy-dissipation orifice plate that is used for flood discharging tunnel according to the invention 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 and the radian of said transition camber line 5 are consistent; 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 radian of the inside and outside anchor ring of said bush ring (8) and said transition camber line (5) is consistent.
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 |
|---|---|---|---|
| CN2012100072778A CN102433863A (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for spillway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100072778A CN102433863A (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for spillway tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102433863A true CN102433863A (en) | 2012-05-02 |
Family
ID=45982193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100072778A Pending CN102433863A (en) | 2012-01-11 | 2012-01-11 | Energy dissipation pore plate for spillway tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102433863A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616689A (en) * | 2019-09-02 | 2019-12-27 | 四川大学 | Anti-corrosion inner flow orifice plate energy dissipater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082647A (en) * | 1993-07-08 | 1994-02-23 | 水利水电科学研究院水力学研究所 | Eddy-eliminating orifice dissipater |
| JP2001032356A (en) * | 1999-07-26 | 2001-02-06 | Gesuido Shingijutsu Suishin Kiko | Attenuation device of pipe culvert joint |
| CN101748712A (en) * | 2009-12-11 | 2010-06-23 | 四川大学 | Method for rebuilding diversion tunnel into spillway tunnel by utilizing combined pore plate energy dissipation technology |
| CN202416273U (en) * | 2012-01-11 | 2012-09-05 | 黄河勘测规划设计有限公司 | Energy dissipation pore plate for flood discharge tunnel |
-
2012
- 2012-01-11 CN CN2012100072778A patent/CN102433863A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082647A (en) * | 1993-07-08 | 1994-02-23 | 水利水电科学研究院水力学研究所 | Eddy-eliminating orifice dissipater |
| JP2001032356A (en) * | 1999-07-26 | 2001-02-06 | Gesuido Shingijutsu Suishin Kiko | Attenuation device of pipe culvert joint |
| CN101748712A (en) * | 2009-12-11 | 2010-06-23 | 四川大学 | Method for rebuilding diversion tunnel into spillway tunnel by utilizing combined pore plate energy dissipation technology |
| CN202416273U (en) * | 2012-01-11 | 2012-09-05 | 黄河勘测规划设计有限公司 | Energy dissipation pore plate for flood discharge tunnel |
Non-Patent Citations (3)
| Title |
|---|
| 向桐等: "小浪底水利枢纽工程孔板泄洪洞设计", 《人民黄河》 * |
| 肖强等: "小浪底孔板泄洪洞的施工", 《水力发电》 * |
| 邵光军: "小浪底工程孔板洞孔板环的施工方法", 《四川水力发电》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616689A (en) * | 2019-09-02 | 2019-12-27 | 四川大学 | Anti-corrosion inner flow orifice plate energy dissipater |
| CN110616689B (en) * | 2019-09-02 | 2021-04-27 | 四川大学 | Anti-corrosion inner flow orifice plate energy dissipater |
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Application publication date: 20120502 |