CN106948418B - Vortex eliminating device and method for square upright post on rear wall of closed water inlet pool - Google Patents
Vortex eliminating device and method for square upright post on rear wall of closed water inlet pool Download PDFInfo
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- CN106948418B CN106948418B CN201710312784.5A CN201710312784A CN106948418B CN 106948418 B CN106948418 B CN 106948418B CN 201710312784 A CN201710312784 A CN 201710312784A CN 106948418 B CN106948418 B CN 106948418B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
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Abstract
The invention relates to a vortex-eliminating device for a square upright post on the rear wall of a closed water inlet pool and a method thereof, wherein the vortex-eliminating device comprises the closed water inlet pool and a water suction pipe, wherein one end of the water suction pipe is provided with a horn pipe, and the horn pipe is provided with a horn mouth; the two sides of the rear part of the horn pipe are symmetrically provided with a second square upright post and a third square upright post, the length between the center of the second square upright post and the rear wall of the closed water inlet pool is 0.553 times of the diameter of the horn mouth, the distance between the center of the second square upright post and the side wall of the closed water inlet pool at one side close to the second square upright post is 0.334 time of the diameter of the horn mouth, and the distance between the center of the third square upright post and the side wall of the closed water inlet pool at one side close to the third square upright post is 0.334 time of the diameter of the horn mouth; a first square upright post is arranged right behind the horn tube. According to the invention, the upright posts are used for filling the water body at the position where the vortex occurs, scattering the water body, recombining the water body, reducing the vortex quantity speed of the water flow, and achieving the effect of preventing and treating the wall-attached vortex of the closed water inlet pool.
Description
Technical Field
The invention relates to a closed water inlet pool rear wall square upright post vortex eliminating device and a method thereof, belonging to the technical field of pump station engineering design.
Background
The open type water inlet pool is a structure for a water supply pump to suck water through a water suction pipe, has a free water surface, and is usually used for small and medium-sized pump stations. The closed intake pool is characterized in that a concrete cover plate is arranged at the position of a water pump beam of the open intake pool to seal the open intake pool. The improvement method has the advantages that the water inlet pool has no free water surface, and surface vortex cannot be caused by free water surface fluctuation and flow disorder in the pool. Although the closed water inlet tank avoids the harm of surface vortex which can occur, the prevention and treatment effect on another harmful vortex, namely the wall attachment vortex, which occurs in the water inlet tank is not obvious. After the coanda vortex is generated in the closed water inlet tank, the water flow pulsation in the water inlet tank is intensified, various harmful low-frequency hydraulic vibration can be possibly caused, the resonance of a pump room and facilities nearby the pump room is easily caused, and the operation safety of the whole pump station is endangered.
The commonly used method for preventing and controlling the wall-attached vortex in the open type water inlet pond comprises the measures of arranging a rear partition plate, a rear wall partition plate and the like. However, the conventional vortex-eliminating measures for the open-type water inlet tank are not suitable because the flow velocity in the closed-type water inlet tank is high.
Disclosure of Invention
The invention aims to provide a vortex eliminating device and a vortex eliminating method for a square upright post on the rear wall of a closed water inlet pool, which can effectively eliminate the wall-attached vortex of the rear wall of the closed water inlet pool.
The invention aims to realize the vortex-eliminating device with the square upright post on the rear wall of the closed water inlet pool, which comprises the closed water inlet pool and a water suction pipe arranged in the closed water inlet pool, wherein the closed water inlet pool comprises a closed water inlet pool side wall, a closed water inlet pool rear wall, a closed water inlet pool top plate and a closed water inlet pool bottom plate, one end of the water suction pipe arranged in the closed water inlet pool is provided with a horn pipe, and the horn pipe is provided with a horn mouth; the method is characterized in that: the two sides of the rear part of the horn pipe are symmetrically provided with a second square upright post and a third square upright post, the length between the center of the second square upright post and the center of the third square upright post and the rear wall of the closed water inlet pool is 0.553 times of the diameter of the horn mouth, the distance between the center of the second square upright post and the side wall of the closed water inlet pool at the side close to the second square upright post is 0.334 time of the diameter of the horn mouth, and the distance between the center of the third square upright post and the side wall of the closed water inlet pool at the side close to the third square upright post is 0.334 time of the diameter of the horn mouth;
the right back of horn pipe is equipped with first square stand, and the centre-to-centre spacing closed intake pond back wall of first square stand length is 0.25 times of horn mouth diameter.
The length of the first square upright post is 0.2 times of the diameter of the bell mouth, and the height of the first square upright post is 2.5 times of the diameter of the bell mouth.
The side lengths of the second square upright post and the third square upright post are both 0.267 times of the diameter of the bell mouth, and the heights of the second square upright post and the third square upright post are both 1.667 times of the diameter of the bell mouth.
A vortex eliminating method for a square upright post on the rear wall of a closed water inlet pool is characterized by comprising the following steps: the closed water inlet pool comprises a closed water inlet pool side wall, a closed water inlet pool rear wall, a closed water inlet pool top plate and a closed water inlet pool bottom plate, wherein a horn tube is arranged at one end of the water suction tube arranged in the closed water inlet pool, and a horn mouth is arranged on the horn tube; the two sides of the rear part of the horn pipe are symmetrically provided with a second square upright post and a third square upright post, the lengths of the centers of the second square upright post and the third square upright post, which are far away from the rear wall of the closed water inlet pool, are 0.553 times of the diameter of the horn mouth, the distance of the center of the second square upright post, which is far away from the side wall of the closed water inlet pool at one side close to the second square upright post, is 0.334 time of the diameter of the horn mouth, and the distance of the center of the third square upright post, which is far away from the side wall of the closed water inlet pool at one side close to the third square upright post, is 0.334 time of the diameter of the horn mouth; a first square upright post is arranged right behind the horn tube, and the distance between the center of the first square upright post and the rear wall of the closed water inlet pool is 0.25 times of the diameter of the horn mouth;
when water flows into the closed water inlet pool, the spaces, which are close to the side wall of the closed water inlet pool and are easy to generate vortexes, of the two sides of the closed water inlet pool are filled by the second square upright posts and the third square upright posts through the second square upright posts and the third square upright posts which are symmetrically arranged on the two sides of the rear part of the horn tube, and after the water flows pass through the second square upright posts and the third square upright posts, the water flows and is separated at the upright post edges of the second square upright posts and the third square upright posts, so that the original flowing state of the water flow is changed, and the energy exchange strength of the water flow around each layer of the second square upright posts and the third square upright posts is enhanced; the first square upright post arranged right behind the horn pipe separates and seals the water flow behind the horn pipe, so that the water flow flows into the horn pipe and the water suction pipe from two sides through the horn mouths respectively, the mutual interference of the water flow behind the horn pipe and the generation of vortex are avoided, and the vortex elimination purpose is realized.
The length of the first square upright post is 0.2 times of the diameter of the bell mouth, and the height of the first square upright post is 2.5 times of the diameter of the bell mouth.
The side lengths of the second square upright post and the third square upright post are both 0.267 times of the diameter of the bell mouth, and the heights of the second square upright post and the third square upright post are both 1.667 times of the diameter of the bell mouth.
The closed water inlet tank is reasonable in structure and advanced and scientific in method, two square columns (a second square column and a third square column) are symmetrically arranged behind the horn pipe of the closed water inlet tank, the center distance between the second square column and the third square column is 0.553D (D is the diameter of a horn mouth), and the center distance between the second square column and the third square column is 0.334D from the side wall of the closed water inlet tank. The side lengths of the second square upright post and the third square upright post are both 0.267D, and the heights of the second square upright post and the third square upright post are both 1.667D. A square upright post (a first square upright post) is arranged right behind the horn tube, the length of the first square upright post is 0.2D, the height of the first square upright post is 2.5D, and the center distance of the first square upright post is 0.25D from the rear wall of the closed water inlet pool.
Through setting up two square stand (the square stand of second, the third side shape stand) at closed intake pool bilateral symmetry, the space that closed intake pool both sides easily produced the swirl is filled by the stand, rivers are behind the stand, the separation that flows takes place in the edge department of stand (the square stand of second, the third side shape stand), the water is broken up, the original mobile state of rivers has been changed, each layer rivers energy exchange has aggravated the square stand of second, the energy exchange intensity of each layer rivers around the third side shape stand. Set up a square stand (first square stand) directly behind the horn pipe, separate and seal horn pipe rear rivers for rivers flow into the horn pipe from both sides respectively, avoid rear rivers mutual interference, produce the swirl, realize the vortex elimination purpose.
In conclusion, the invention aims to provide a vortex eliminating method for a square upright post on the rear wall of a closed water inlet pool aiming at an area where vortex is easily generated on the rear wall in the closed water inlet pool. The arranged square upright posts adopt corresponding height and side length according to the geometric dimension of the closed water inlet pool, and wall-attached vortex of the rear wall of the closed water inlet pool can be effectively eliminated.
The invention utilizes the fluid mechanics principle, the space geometry and the pump station intake pool design theory, innovates the prevention and control of the enclosed intake pool wall-attached vortex, fills the water body at the position where the vortex appears with the upright column, breaks up the water body, recombines the water body, reduces the vortex volume speed of the water flow, thereby achieving the effect of preventing and controlling the enclosed intake pool wall-attached vortex.
The invention is reasonable, simple and scientific in structure, is an innovation of vortex prevention measures of the closed type water inlet pool based on a fluid mechanics principle, space geometry and a pump station water inlet pool design theory, and the square upright posts enable the water body of the region of the closed type water inlet pool, which is easy to generate vortices, to be scattered through reasonable parameter design and arrangement mode, and perform energy exchange again, so that a smoother flow state is obtained, and further the vortices are inhibited from being generated.
At present, with the implementation of reconstruction of large and medium irrigation areas and the implementation of updating and reconstruction of pump stations in China, the wide and large-scale constructed pump stations face the situations of difficult maintenance and serious problems of safe operation, and the form of a water inlet pool can be reconstructed into a closed water inlet pool; with the development of the open type water inlet tank to the closed type water inlet tank, the stable operation range of the closed type water inlet tank is expanded, and the vortex prevention and elimination capability of the closed type water inlet tank is improved, so that the closed type water inlet tank is very necessary, and the open type water inlet tank can generate great economic value and social benefit.
Drawings
FIG. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic view of the structure of the present invention in the front view direction.
In the figure: the water intake system comprises a horn tube 1, a closed water intake pool side wall 2, a closed water intake pool rear wall 3, a square upright column 4, a square upright column 5, a square upright column 6, a closed water intake pool top plate 7, a closed water intake pool bottom plate 8 and a water suction tube 9.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
a closed water inlet pool back wall square upright post vortex-eliminating device comprises a closed water inlet pool and a water suction pipe 9 arranged in the closed water inlet pool, wherein the closed water inlet pool comprises a closed water inlet pool side wall 2, a closed water inlet pool back wall 3, a closed water inlet pool top plate 7 and a closed water inlet pool bottom plate 8, one end of the water suction pipe 9 arranged in the closed water inlet pool is provided with a horn-shaped pipe 1, the horn-shaped pipe 1 is provided with a horn mouth, and water flow enters the horn-shaped pipe 1 through the horn mouth; the second square upright post 4 and the third square upright post 6 are symmetrically arranged on two sides of the rear part of the flared tube 1, the length between the center distance of the second square upright post 4 and the rear wall 3 of the closed type water inlet pool of the third square upright post 6 is 0.553 times of the diameter of the flared opening, the distance between the center distance of the second square upright post 4 and the side wall 2 of the closed type water inlet pool close to one side of the second square upright post 4 is 0.334 time of the diameter of the flared opening, the distance between the center distance of the third square upright post 6 and the side wall 2 of the closed type water inlet pool close to one side of the third square upright post 6 is 0.334 time of the diameter of the flared opening, the side length of the second square upright post 4 and the side length of the third square upright post 6 are 0.267 times of the diameter of the flared opening, and the height is 1.667 times of the diameter of the flared opening.
Set up first square column 5 directly behind horn pipe 1, the length of the closed intake pond back wall of the centre-to-centre spacing of first square column 5 is 0.25 times of horn mouth diameter, and the length of first square column 5 is 0.2 times of horn mouth diameter, highly is 2.5 times of horn mouth diameter.
When water flows into the closed water inlet pool, through the second square upright post 4 and the third square upright post 6 which are symmetrically arranged at the two sides of the rear part of the horn tube 1, the space which is close to the side wall 2 of the closed water inlet pool and is easy to generate vortex at the two sides of the closed water inlet pool is filled by the second square upright post 4 and the third square upright post 6, and after the water flows pass through the second square upright post 4 and the third square upright post 6, the flow separation is generated at the upright post edges of the second square upright post 4 and the third square upright post 6, the original flow state of the water flow is changed, and the energy exchange intensity of each layer of water flow around the second square upright post 4 and the third square upright post 6 is intensified; the first square upright post 5 arranged right behind the horn tube 1 separates and seals the water flow behind the horn tube 1, so that the water flow flows into the horn tube 1 and the water suction pipe 9 from two sides through horn mouths, the mutual interference of the water flow behind the horn tube 1 and the vortex generation are avoided, and the vortex elimination purpose is realized.
We can set D as the bell mouth diameter, in this embodiment, two square columns (second square column 4, third square column 6) are symmetrically installed at the rear of the closed type intake pool bell pipe 1, the center distance between the second square column 4 and the third square column 6 is 0.553D from the closed type intake pool rear wall, the center distance between the second square column 4 and the third square column 6 is 0.334D close to the closed type intake pool side wall on the side of the second square column 4, and the center distance between the third square column 6 and the closed type intake pool side wall on the side of the third square column 6 is 0.334D. The side lengths of the two square columns (the second square column 4 and the third square column 6) are both 0.267D, and the height is both 1.667D. A square upright post (a first square upright post 5) is arranged right behind the horn tube 1, the length of the first square upright post 5 is 0.2D, the height of the first square upright post 5 is 2.5D, and the center distance between the first square upright post 5 and the rear wall of the closed water inlet pool is 0.25D.
Claims (2)
1. A vortex-eliminating device for a square upright post on the rear wall of a closed water inlet pool comprises the closed water inlet pool and a water suction pipe (9) arranged in the closed water inlet pool, wherein the closed water inlet pool comprises a closed water inlet pool side wall (2), a closed water inlet pool rear wall (3), a closed water inlet pool top plate (7) and a closed water inlet pool bottom plate (8), a horn tube (1) is arranged at one end of the water suction pipe (9) arranged in the closed water inlet pool, and a horn mouth is arranged on the horn tube (1); the method is characterized in that: the two sides of the rear part of the horn tube (1) are symmetrically provided with a second square upright post (4) and a third square upright post (6), the lengths of the centers of the second square upright post (4) and the third square upright post (6) to the closed water inlet tank rear wall (3) are 0.553 times of the diameter of the horn mouth, the distance between the center of the second square upright post (4) and the center of the third square upright post (6) to the closed water inlet tank side wall (2) close to one side of the second square upright post (4) is 0.334 time of the diameter of the horn mouth, and the distance between the center of the third square upright post (6) and the closed water inlet tank side wall (2) close to one side of the third square upright post (6) is 0.334 time of the diameter of the horn mouth;
a first square upright post (5) is arranged right behind the horn tube (1), and the distance between the center of the first square upright post (5) and the rear wall of the closed water inlet pool is 0.25 times of the diameter of the horn mouth;
the length of the first square upright post (5) is 0.2 times of the diameter of the bell mouth (1), and the height of the first square upright post is 2.5 times of the diameter of the bell mouth; the side lengths of the second square upright post (4) and the third square upright post (6) are 0.267 times of the diameter of the bell mouth, and the heights of the second square upright post and the third square upright post are 1.667 times of the diameter of the bell mouth.
2. A vortex eliminating method for a square upright post on the rear wall of a closed water inlet pool is characterized by comprising the following steps: the closed water inlet pool comprises a closed water inlet pool side wall (2), a closed water inlet pool rear wall (3), a closed water inlet pool top plate (7) and a closed water inlet pool bottom plate (8), wherein a horn pipe (1) is arranged at one end of the water suction pipe (9) arranged in the closed water inlet pool, and a horn mouth is formed in the horn pipe (1); the two sides of the rear part of the horn tube (1) are symmetrically provided with a second square upright post (4) and a third square upright post (6), the lengths of the center distances between the second square upright post (4) and the third square upright post (6) and the closed water inlet pool rear wall (3) are 0.553 times of the diameter of the horn mouth, the distance between the center distance between the second square upright post (4) and the closed water inlet pool side wall (2) close to one side of the second square upright post (4) is 0.334 time of the diameter of the horn mouth, and the distance between the center distance between the third square upright post (6) and the closed water inlet pool side wall (2) close to one side of the third square upright post (6) is 0.334 time of the diameter of the horn mouth; a first square upright post (5) is arranged right behind the horn tube (1), and the distance between the center of the first square upright post (5) and the rear wall of the closed water inlet pool is 0.25 times of the diameter of the horn mouth;
when water flows into the closed water inlet pool, through the second square upright post (4) and the third square upright post (6) which are symmetrically arranged at the two sides of the rear part of the horn tube (1), the space at the two sides of the closed water inlet pool, which is close to the side wall (2) of the closed water inlet pool and is easy to generate vortex, is filled by the second square upright post (4) and the third square upright post (6), after the water flows pass through the second square upright post (4) and the third square upright post (6), the flow separation occurs at the upright edge parts of the second square upright post (4) and the third square upright post (6), the original flow state of the water flow is changed, and the energy exchange strength of the water flow at each layer around the second square upright post (4) and the third square upright post (6) is intensified; the first square upright post (5) is arranged right behind the horn tube (1) and used for separating water flow behind the horn tube (1), so that the water flow flows into the horn tube (1) and the water suction tube (9) from two sides through horn mouths, mutual interference and vortex generation of the water flow behind are avoided, and the vortex elimination purpose is realized;
the length of the first square upright post (5) is 0.2 times of the diameter of the bell mouth (1), and the height of the first square upright post is 2.5 times of the diameter of the bell mouth; the side lengths of the second square upright post (4) and the third square upright post (6) are 0.267 times of the diameter of the bell mouth, and the height of the second square upright post and the third square upright post is 1.667 times of the diameter of the bell mouth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312784.5A CN106948418B (en) | 2017-05-05 | 2017-05-05 | Vortex eliminating device and method for square upright post on rear wall of closed water inlet pool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710312784.5A CN106948418B (en) | 2017-05-05 | 2017-05-05 | Vortex eliminating device and method for square upright post on rear wall of closed water inlet pool |
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| CN106948418A CN106948418A (en) | 2017-07-14 |
| CN106948418B true CN106948418B (en) | 2022-05-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009047082A (en) * | 2007-08-21 | 2009-03-05 | Ebara Corp | Intake tank and pump gate |
| CN203067358U (en) * | 2013-01-24 | 2013-07-17 | 扬州大学 | Novel open-type water pump water inlet pool |
| CN204570820U (en) * | 2015-04-01 | 2015-08-19 | 扬州大学 | Open type intake pool rear wall partition wall disappears whirlpool device |
| CN204570818U (en) * | 2015-03-10 | 2015-08-19 | 扬州大学 | A kind of closed intake pool Prevention and dissipation cone |
| CN105508308A (en) * | 2016-01-28 | 2016-04-20 | 扬州大学 | Novel pumping station water pump beam anti-vortex device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5620208B2 (en) * | 2009-09-28 | 2014-11-05 | 株式会社荏原製作所 | Double suction vertical pump with vortex prevention device |
-
2017
- 2017-05-05 CN CN201710312784.5A patent/CN106948418B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009047082A (en) * | 2007-08-21 | 2009-03-05 | Ebara Corp | Intake tank and pump gate |
| CN203067358U (en) * | 2013-01-24 | 2013-07-17 | 扬州大学 | Novel open-type water pump water inlet pool |
| CN204570818U (en) * | 2015-03-10 | 2015-08-19 | 扬州大学 | A kind of closed intake pool Prevention and dissipation cone |
| CN204570820U (en) * | 2015-04-01 | 2015-08-19 | 扬州大学 | Open type intake pool rear wall partition wall disappears whirlpool device |
| CN105508308A (en) * | 2016-01-28 | 2016-04-20 | 扬州大学 | Novel pumping station water pump beam anti-vortex device and method |
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| CN106948418A (en) | 2017-07-14 |
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