CN205100186U - Structure graduallys change in tunnel circle side - Google Patents
Structure graduallys change in tunnel circle side Download PDFInfo
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- CN205100186U CN205100186U CN201520893678.7U CN201520893678U CN205100186U CN 205100186 U CN205100186 U CN 205100186U CN 201520893678 U CN201520893678 U CN 201520893678U CN 205100186 U CN205100186 U CN 205100186U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a structure graduallys change in tunnel circle side, the structure that should gradually change include the barrel section and with the gradual change contraction section of barrel section intercommunication, the cross section of barrel section is circular, and the end of gradual change contraction section be the floodgate door hole mouth of rectangle cross section, from the link continuous gradation of the barrel section and the contraction section that graduallys change and contract floodgate door hole mouth. This gradual change structure makes transition and contraction section gradually change consecutively and contract, and the messenger is more smooth -going in the same direction as water flow direction, reduces the emergence of erosion phenomenon, reduces head loss.
Description
Technical field
The utility model relates to a kind of tunnel circle side grading structure, belongs to hydraulic tunnel field.
Background technology
In hydraulic tunnel, barrel section adopts circular cross section usually, import and export gate and then adopt square cross-section, and the connection between circle and square cross-section need adopt grading structure usually.Particularly for the outlet of pressurized tunnel, for ensureing there is larger malleation in hole, the cross-sectional area going out port strobe need be punctured into 80% ~ 90% of barrel cross-sectional area, shrinks the form of top, mode many employings hole pressure slope.
The grading structure of pressurized tunnel generally includes the barrel section, transition section and the contraction section that connect successively, the cross section of barrel section is circular, the end of contraction section is the gate aperture of placing gate, and gate aperture is generally set as rectangle, therefore needs circular gradual change to be shrunk to rectangle.Common processing mode is: the barrel circular cross section being first R by footpath, hole at transition section crossfades into the square that length and width are R, and then adopt top, hole pressure slope mode to shrink in foursquare section at contraction section, be contracted to the rectangle that gate aperture becomes former cross-sectional area 80% ~ 90%.
The unfavorable effect of this processing mode is: footpath, hole is that the barrel section of R first diffuses into square, then is shrunk to rectangle, causes flow-shape disorderly, and adds the length of transition section, add engineering quantity.
Utility model content
The technical problem that the utility model solves is, reduces the length of hydraulic tunnel transition section, makes flow-shape smooth and easy.
The technical solution of the utility model is, a kind of tunnel circle side grading structure is provided, the gradual change contraction section comprising barrel section and be communicated with barrel section, the cross section of described barrel section is circular, the end of gradual change contraction section is the gate aperture of rectangular cross section, is retracted to gate aperture from the link continuous gradation of barrel section and gradual change contraction section.
Further, gradual change contraction section adopts the mode continuous gradation of top, hole pressure slope and shrinks.
Further, the slope such as to be punctured into described in than shrinking.
Further, the slope ratio that described gradual change contraction section shrinks is 1:4 ~ 1:7.
Further, gradual change contraction section is the rectangle with fillet near the cross section of the part of barrel section, and gradual change contraction section is rectangle near the cross section of the part in gate aperture.
Further, the cross section of gradual change contraction section is the rectangle with fillet.
The beneficial effects of the utility model are, improve original tunnel grading structure, original transition section and contraction section are merged, continuously gradual change shrinking, and make Parallel to the flow direction more smooth-going, reduce the generation of erosion phenomenon, reduce head loss.
Accompanying drawing explanation
Fig. 1 represents the front view of the tunnel circle side grading structure that the utility model provides.
Fig. 2 represents the front view of tunnel circle side of the prior art grading structure.
Fig. 3 represents the cross sectional representation of A-A in Fig. 1.
Fig. 4 represents a kind of situation of the cross sectional representation of B-B in Fig. 1.
Fig. 5 represents the another kind of situation of the cross sectional representation of B-B in Fig. 1.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1
The utility model provides a kind of tunnel circle side grading structure, its structure is as Fig. 1 and Fig. 3, 4, shown in 5, comprise barrel section 1 and the gradual change contraction section 2 of connection, the cross section of described barrel section 1 is circular (Fig. 3), the end of gradual change contraction section 2 is gate aperture, the cross section in gate aperture is rectangle, adopt the mode of top, hole pressure slope from the link continuous gradation of barrel section 1 and gradual change contraction section 2 and be retracted to gate aperture, Zha Men Bowl 3 is beyond gate aperture, gradual change contraction section 2 is the rectangle (Fig. 5) with fillet near the cross section of barrel section 1 part, gradual change contraction section 2 is rectangle (Fig. 4) near the cross section of the part in gate aperture.
This kind of grading structure is owing to being retracted to gate aperture from the link continuous gradation of barrel section 1 and gradual change contraction section 2, and the fluidised form of Gu Shui is than smoothly; Cross section due to gradual change contraction section 2 is rectangle, therefore lays template, easy construction than being easier to.
Embodiment 2
The present embodiment provides a kind of tunnel circle side grading structure, and its structure is with embodiment 1, and its difference is only, the cross section of gradual change contraction section 2 is the rectangle with fillet, and its structure is as shown in Fig. 1 and Fig. 3,5.The gradual change of this kind of structure is more level and smooth, and the fluidised form of water is more smooth and easy, but template is inconvenient to arrange, makes construction slightly inconvenient.
Comparative example 1
This comparative example provides a kind of existing tunnel circle side grading structure, the front view of its structure is as Fig. 2, comprise the barrel section 1 connected successively, transition section 4 and contraction section 5, the cross section of described barrel section 1 is circular, the end of contraction section 5 is gate aperture, the cross section in gate aperture is rectangle, adopt the mode of top, hole pressure slope from link (i.e. the initiating terminal of the contraction section 5) continuous gradation of transition section 4 and contraction section 5 and be retracted to gate aperture (end of contraction section 5), Zha Men Bowl 3 is beyond gate aperture, the cross section of transition section 4 is the rectangle with fillet, the cross section of contraction section 5 is rectangle.Under this kind of grading structure, the fluidised form of water is more disorderly, and head loss is larger.
Claims (6)
1. a tunnel circle side grading structure, it is characterized in that, the gradual change contraction section (2) comprising barrel section (1) and be communicated with barrel section (1), the cross section of described barrel section (1) is circular, the end of gradual change contraction section (2) is the gate aperture of rectangular cross section, is retracted to gate aperture from the link continuous gradation of barrel section (1) and gradual change contraction section (2).
2. grading structure as claimed in claim 1, is characterized in that, gradual change contraction section (2) adopts the mode continuous gradation of top, hole pressure slope and shrinks.
3. grading structure as claimed in claim 2, is characterized in that, described in be punctured into and wait slope than contraction.
4. the grading structure as described in any one of claim 1-3, is characterized in that, the slope that described gradual change contraction section (2) is shunk is than being 1:4 ~ 1:7.
5. the grading structure as described in any one of claim 1-3, it is characterized in that, the cross section of the part of the close barrel section (1) of gradual change contraction section (2) is the rectangle with fillet, and gradual change contraction section (2) is rectangle near the cross section of the part in gate aperture.
6. the grading structure as described in any one of claim 1-3, is characterized in that, the cross section of gradual change contraction section (2) is the rectangle with fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520893678.7U CN205100186U (en) | 2015-11-11 | 2015-11-11 | Structure graduallys change in tunnel circle side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520893678.7U CN205100186U (en) | 2015-11-11 | 2015-11-11 | Structure graduallys change in tunnel circle side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205100186U true CN205100186U (en) | 2016-03-23 |
Family
ID=55515976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520893678.7U Active CN205100186U (en) | 2015-11-11 | 2015-11-11 | Structure graduallys change in tunnel circle side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205100186U (en) |
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2015
- 2015-11-11 CN CN201520893678.7U patent/CN205100186U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |