CN110792131A - Inner sleeve pipe protection cage type water taking head - Google Patents
Inner sleeve pipe protection cage type water taking head Download PDFInfo
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- CN110792131A CN110792131A CN201911002321.4A CN201911002321A CN110792131A CN 110792131 A CN110792131 A CN 110792131A CN 201911002321 A CN201911002321 A CN 201911002321A CN 110792131 A CN110792131 A CN 110792131A
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- steel pipe
- pipe
- water
- inner sleeve
- sleeve pipe
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/04—Methods or installations for obtaining or collecting drinking water or tap water from surface water
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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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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Water Supply & Treatment (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to an inner sleeve pipe protection cage type water taking head, wherein a three-way shell comprises an outer steel pipe and a water taking main pipe which is arranged in the middle of the outer steel pipe and vertically intersected with the outer steel pipe, an inner sleeve pipe with two ends protruding out of the outer steel pipe is sleeved in the outer steel pipe, a flow passage separation steel plate is welded between the outer steel pipe and the inner sleeve pipe, a flow passage rotating along the pipe wall of the inner sleeve pipe is formed between the outer steel pipe and the inner sleeve pipe, water inlets are formed in two ends of the outer steel pipe, and a protection cage type dirt. When the water inlet device is used, the distribution range of the flow field near the water inlet is wider and more uniform, raw water can uniformly enter along the periphery of the protection cage, the total water inlet area can be increased, the requirement of smaller flow velocity of the grid passing can be met, the number of the water inlets can be reduced, and the size of the water inlets is reduced.
Description
Technical Field
The invention relates to the technical field of water taking parts, in particular to an inner sleeve tube-protection cage type water taking head, and particularly relates to an inner sleeve tube-protection cage type three-way water taking head capable of uniformly taking water.
Background
At present, for river water taking, a riverbed type water taking head is common, and the form of a water taking opening mainly comprises a box type water taking opening, a horn mouth type water taking opening and the like. The water intake often faces the threat of floaters or suspended matters such as waterweeds, branches, plastic bags, fabrics and the like in the operation process, once the water intake at the water intake is large and the flow velocity of the grid passing at the dirt blocking grid is high, the impurities can be sucked, so that the water intake is blocked, and the water intake capability is reduced after the water intake runs for a long time, which is an inevitable result.
After statistics on the built engineering, it is found that for the intake in the form of a bell mouth, in order to reduce the flow rate of the flow passing through the grid, the following method is often adopted in the design process:
(1) in order to reduce the flow velocity of the water passing through the gate at the water inlet, the water taking depth is limited, and the water taking depth is often realized by arranging a plurality of bell mouths. For example, in a water plant in Sichuan and a water intake project of 50 ten thousand tons/day, the number of the bell mouths 12 of DN2000 x 1200 is set, and the maximum flow velocity of the water passing grid is designed to be about 0.3 m/s.
When the method is adopted, the water intake is more, the project investment is relatively higher, the construction difficulty is higher, and the later operation and maintenance workload is relatively larger. Moreover, the influence on flood discharge, shipping and the like of the river channel is increased.
(2) When the water depth condition is better, the size of the bell mouth is increased, and sometimes a protective cage type grating is arranged in front of the bell mouth. For example, in a certain water plant in Zhejiang, the 100-ten-thousand-ton/day water taking head is provided with 6 downward bell mouths, and the specification of a single bell mouth is DN3600 x 2000. A cage-protecting type grid is also arranged in front of the bell mouth, and the length of the cage-protecting type grid is 500 mm. Calculating, if only arranging a trash rack at the bell mouth, and designing the maximum flow velocity of the trash rack to be 0.31 m/s; after the cage type grating is adopted, if all the cage surfaces are taken as water passing surfaces, the flow velocity of the passing grating is reduced to 0.15 m/s.
When adopting bellmouth water intaking head, the bellmouth orientation generally upwards or downwards, when increasing the bellmouth bore, often requires the depth of water to arrange of water intaking head.
Establish before the horn mouth and protect cage formula trash rack, often protect the length of cage less, in case protect when cage length is great, intake will concentrate on the region nearer apart from the water inlet, make this regional actual fence velocity of flow increase that crosses on the contrary to it adsorbs the floater to change easily.
Disclosure of Invention
The invention aims to provide an inner sleeve pipe protection cage type water taking head, which is provided with an outer steel pipe and an inner sleeve, wherein a flow channel is arranged between the outer steel pipe and the inner sleeve, so that the distribution range of a flow field near a water inlet is wider and more uniform, and the purposes of increasing the total water inlet area, reducing the number of the water inlets and reducing the requirements of the water taking port on water depth and shipping are achieved.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an interior sleeve pipe protects cage water intaking head, includes the tee bend casing, its characterized in that: the tee bend casing includes outside steel pipe and sets up outside steel pipe middle part and be responsible for with the perpendicular crossing water intaking of outside steel pipe, and outside steel pipe endotheca is equipped with the interior sleeve pipe of the outside steel pipe of a both ends protrusion, and the welding has the runner to separate the steel sheet between outside steel pipe and the interior sleeve pipe for form the rotatory runner of interior sleeve pipe wall along between outside steel pipe and the interior sleeve pipe, the both ends of outside steel pipe are the water inlet, and water inlet department is equipped with protects the cage and blocks dirty grid.
Preferably, k flow channels are formed between the outer steel pipe and the inner sleeve, the value of k is 6-12, each flow channel separates the starting end to the terminal end of the steel plate and rotates for an angle theta along the circumferential direction of the inner sleeve, and the value range of theta is preferably 90-180 degrees.
Furthermore, the cage-protecting type trash rack is formed by connecting a group of grid bars with first and second I-shaped steels arranged at two ends of the grid bars, the first and second I-shaped steels are bent into a circular ring with the same diameter as the external steel pipe, and two ends of the first and second I-shaped steels are respectively connected with the grid bars and the external steel pipe.
Compared with the prior art, the technical scheme of the invention comprises the improvement of a plurality of details besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. according to the improved scheme, the outer steel pipe is internally sleeved with the inner sleeve pipe with two ends protruding out of the outer steel pipe, the runner separation steel plate is welded between the outer steel pipe and the inner sleeve pipe, so that a runner rotating along the pipe wall of the inner sleeve pipe is formed between the outer steel pipe and the inner sleeve pipe, the distribution range of a flow field near a water inlet is wider and more uniform, raw water can uniformly enter along the periphery of the protection cage, the total water inlet area can be increased, the requirement of smaller cross-grid flow speed can be met, the number of the water inlets can be reduced, and the size of the water inlet can be reduced;
2. according to the technical scheme, the water inlets are formed in the two ends of the external steel pipe, and the cage type trash rack is arranged at the water inlets, so that the water inlet area can be effectively increased;
3. the invention adopts a horizontal water inlet mode, and reduces the requirement of a water intake on water depth. The three-way water inlet is adopted, the caliber of the water inlet pipeline is consistent with that of the water conduit, water is fed in the horizontal direction, and an upward or downward horn mouth is not required to be arranged;
4. the invention has simple structure, low manufacturing cost and convenient popularization and utilization.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Figure 2 is a schematic view of the partial assembly of the outer steel tube and the inner casing according to the invention.
Fig. 3 is a schematic view of a part in the direction of N in fig. 1.
Fig. 4 is a schematic view of a part M in fig. 1.
Reference numerals:
the water taking device comprises a water taking main pipe 1, a three-way shell 2, a first I-shaped steel 3, a grid 4, a second I-shaped steel 5, an external steel pipe 6, an internal sleeve 7 and a runner separation steel plate 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an inner sleeve protection cage type water taking head, which particularly refers to a figure 1 and comprises a three-way shell, and is characterized in that: the tee bend casing includes outside steel pipe and sets up outside steel pipe middle part and be responsible for with the perpendicular crossing water intaking of outside steel pipe, and outside steel pipe endotheca is equipped with the interior sleeve pipe of the outside steel pipe of a both ends protrusion, and the welding has the runner to separate the steel sheet between outside steel pipe and the interior sleeve pipe for form the rotatory runner of interior sleeve pipe wall along between outside steel pipe and the interior sleeve pipe, the both ends of outside steel pipe are the water inlet, and water inlet department is equipped with protects the cage and blocks dirty grid.
Specifically, when the invention is implemented, a clapboard is arranged between the inner pipeline and the outer pipeline to form a flow channel which rotates along the pipe wall and has the length equivalent to that of the inner pipeline, and a protective cage type trash rack with larger length is arranged at the water inlet. Interior sleeve pipe and follow the rotatory runner of interior sleeve pipe wall and make near the flow field distribution range of water inlet wider also more even, the raw water can be followed and protected the peripheral even intaking of cage, reaches both to increase total intake area, satisfies less crossing grid velocity of flow requirement, can reduce the water inlet number again, reduces the water inlet size, reduces the intake to the requirement of depth of water, shipping, can also reduce the engineering volume of wading, reduces engineering investment etc..
In one embodiment, the present invention employs a three-way water intake head. The diameter of the tee joint is the same as the caliber of the water conduit (both are D), and the tee joint type water taking head part and the water conduit can be connected by a flange or can be welded. The inner sleeve is arranged in the water inlet, k flow channels are formed between the external steel pipe and the inner sleeve, the numerical value of k is 6-12, the starting end to the terminal end of each flow channel for separating the steel plate rotate for an angle theta along the circumferential direction of the inner sleeve, the value range of theta is 90-180 degrees, and the optimal value is 100 plus 120 degrees.
Preferably, a cage-protecting type trash rack is arranged outside the water inlet of the external steel pipe, the cage-protecting type trash rack is formed by connecting a group of grid bars with first and second I-shaped steels arranged at two ends of the grid bars, the first and second I-shaped steels are bent into a circular ring with the same diameter as the external steel pipe, and the first I-shaped steel is connected with the grid bars and the external steel pipe. The distance between the grid bars is 80-100 mm. The caliber of the water inlet is the same as that of the main water taking pipe, the caliber of the external steel pipe is D, the caliber of the inner sleeve is D, wherein D2=2*d2。
In a specific embodiment, in order to reduce the number of water inlets, minimize the size of the water inlets, and reduce the requirement for the water depth at the water inlet, the following measures are considered: the size of the water intake is reduced as much as possible, and the requirement of the water intake on the water depth is reduced by adopting a horizontal water inlet mode. A three-way water inlet is adopted, the caliber of a water inlet pipeline is consistent with that of a water diversion pipeline, water enters in the horizontal direction, and an upward or downward horn mouth is not needed. A protective cage type grating with a longer size is arranged at the water inlet. Raw water enters from the periphery of the cage-type protective grating, so that the water inlet area can be effectively increased. An inner sleeve pipe protruding towards the protective cage is arranged in the pipeline at the water inlet, and a multi-point water inlet mode is adopted, so that the distribution range of a flow field near the water inlet is wider and more uniform, raw water uniformly enters along the periphery of the protective cage, and the phenomenon of nonuniform distribution of the flow velocity of the cross grid is avoided.
Specifically, the requirements for the components are as follows:
(1) the caliber of the external steel pipe is D, and the length of the I-shaped steel (generally I10a type) is h.
(2) The diameter of the inner sleeve is d, the length of the inner sleeve is L, and the inner sleeve is longer than the external steel pipe section by X. When the caliber of the inner sleeve is calculated, D is satisfied as much as possible2=2*d2。
(3) And a flow passage separating steel plate welded between the inner sleeve and the outer steel pipe welds the inner sleeve and the outer steel pipe into a whole. The rotation angle of the partition plate from the starting end to the terminal end along the circumference of the inner sleeve is theta, and K flow passages are formed between the inner pipe and the outer pipe (K is determined according to the firmness of the combination of the inner pipe and the outer pipe and can be 6-12%.
(4) The length of the inner sleeve is basically the same as the length of the flow passage between the inner and outer pipelines, and is about (h)2+(4.36*10-3*θ* (D+d))2）0.5。
(5) The length of the protective cage is (X + H), when the water intake of a single water inlet is q, the flow velocity of the passing grid is v (25% of blockage between grids), and the grid spacing is β:
the relationship between the lengths H and X approximately satisfies the equation X = η (H + 0.25D)
The relationship between the flow rates q and X approximately satisfies the equation 4.72X (1+ η) X (H + 0.25X D) β X D v = q (β +10)
Wherein η = (D ^2-D ^ 2)/D ^2
Taking a single water taking head (two water inlets) with the water inflow of 22 ten thousand tons/day (10% of balance is taken in 20 ten thousand tons/day), the flow velocity of the grid passing is 0.3m/s (25% of blockage between grids), the space between the grids is 80mm, and for example, the differences between the adoption of the horn mouth type water taking head and the adoption of the invention are as follows:
1) when a single flare is used, the flare diameter is DN4000 x 1600.
2) When a double-bell mouth is adopted, the diameter of the bell mouth is DN2800 x 1600.
3) When three horns are used, the horn diameter is DN2400 x 1600 m.
4) When the invention is adopted, the diameter of the outer sleeve is DN1600, the caliber of the inner sleeve is DN1200, and when: the length H of the overlapped part of the inner sleeve and the outer sleeve is =0.8m, the flow channel spiral angle is 90 degrees, the length X + H of the protective cage is =0.88m, wherein X =0.56m, and the actual flow velocity of the passing grid is 0.29 m/s; the length H of the overlapped part of the inner sleeve and the outer sleeve is =0.1m, the flow channel helix angle is 120 degrees, the length X + H of the protective cage is =1.59m, wherein X =0.87m, and the actual flow velocity of the passing grid is 0.19 m/s.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific details set forth herein. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. The utility model provides an interior sleeve pipe protects cage water intaking head, includes the tee bend casing, its characterized in that: the tee bend casing includes outside steel pipe and sets up outside steel pipe middle part and be responsible for with the perpendicular crossing water intaking of outside steel pipe, and outside steel pipe endotheca is equipped with the interior sleeve pipe of the outside steel pipe of a both ends protrusion, and the welding has the runner to separate the steel sheet between outside steel pipe and the interior sleeve pipe for form the rotatory runner of interior sleeve pipe wall along between outside steel pipe and the interior sleeve pipe, the both ends of outside steel pipe are the water inlet, and water inlet department is equipped with protects the cage and blocks dirty grid.
2. An inner casing protection cage type water intake head as claimed in claim 1, wherein: k flow channels are formed between the outer steel pipe and the inner sleeve, the value of k is 6-12, each flow channel separates the starting end to the terminal end of the steel plate and rotates for an angle theta along the circumferential direction of the inner sleeve, and the value range of theta is 90-180 degrees.
3. An inner casing protection cage type water intake head as claimed in claim 1, wherein: the protective cage type trash rack is formed by connecting a group of grid bars with first and second I-shaped steels arranged at two ends of the grid bars, the first and second I-shaped steels are bent into a circular ring with the same diameter as an external steel pipe, and two ends of the first and second I-shaped steels are respectively connected with the grid bars and the external steel pipe.
4. An inner casing protection cage type water intake head as claimed in claim 1, wherein: the caliber of the external steel pipe is D, the caliber of the inner sleeve is D, wherein D2=2*d2。
5. An inner casing protection cage type water intake head according to claim 3, wherein: the distance between the grid bars is 80-100 mm.
6. An inner casing protection cage type water intake head as claimed in claim 1, wherein: the caliber of the water inlet is the same as that of the main water taking pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002321.4A CN110792131B (en) | 2019-10-21 | 2019-10-21 | Inner sleeve pipe protection cage type water taking head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002321.4A CN110792131B (en) | 2019-10-21 | 2019-10-21 | Inner sleeve pipe protection cage type water taking head |
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| Publication Number | Publication Date |
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| CN110792131A true CN110792131A (en) | 2020-02-14 |
| CN110792131B CN110792131B (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911002321.4A Active CN110792131B (en) | 2019-10-21 | 2019-10-21 | Inner sleeve pipe protection cage type water taking head |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2166030C1 (en) * | 1999-09-22 | 2001-04-27 | Курский государственный технический университет | Water intaking apparatus |
| CN2544126Y (en) * | 2002-04-17 | 2003-04-09 | 李保忠 | Mud and sand proof water inlet waterhead |
| RU30366U1 (en) * | 2002-11-04 | 2003-06-27 | Омский государственный аграрный университет | Water intake |
| CN201170178Y (en) * | 2008-03-13 | 2008-12-24 | 贵阳铝镁设计研究院 | Tube-type water-fetching head |
| US20150021249A1 (en) * | 2010-11-22 | 2015-01-22 | Bilfinger Water Technologies, Inc. | Screen intake device for shallow water |
| CN206800511U (en) * | 2017-03-16 | 2017-12-26 | 中国市政工程中南设计研究总院有限公司 | Two-way water inlet, ramp type water-fetching head |
-
2019
- 2019-10-21 CN CN201911002321.4A patent/CN110792131B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2166030C1 (en) * | 1999-09-22 | 2001-04-27 | Курский государственный технический университет | Water intaking apparatus |
| CN2544126Y (en) * | 2002-04-17 | 2003-04-09 | 李保忠 | Mud and sand proof water inlet waterhead |
| RU30366U1 (en) * | 2002-11-04 | 2003-06-27 | Омский государственный аграрный университет | Water intake |
| CN201170178Y (en) * | 2008-03-13 | 2008-12-24 | 贵阳铝镁设计研究院 | Tube-type water-fetching head |
| US20150021249A1 (en) * | 2010-11-22 | 2015-01-22 | Bilfinger Water Technologies, Inc. | Screen intake device for shallow water |
| CN206800511U (en) * | 2017-03-16 | 2017-12-26 | 中国市政工程中南设计研究总院有限公司 | Two-way water inlet, ramp type water-fetching head |
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| CN110792131B (en) | 2023-02-10 |
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