CN204728395U - A kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence - Google Patents

A kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence Download PDF

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Publication number
CN204728395U
CN204728395U CN201520411029.9U CN201520411029U CN204728395U CN 204728395 U CN204728395 U CN 204728395U CN 201520411029 U CN201520411029 U CN 201520411029U CN 204728395 U CN204728395 U CN 204728395U
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China
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dustpan
shaped
turning
inlet flow
flow channel
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CN201520411029.9U
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陆林广
徐磊
陆伟刚
练远洋
施克鑫
王海
李亚楠
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Yangzhou University
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Yangzhou University
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Abstract

A dustpan-shaped water inlet flow channel for hydraulic performance excellence, belongs to hydraulic engineering pumping plant technical field.Described dustpan-shaped water inlet flow channel is provided with straight entry section, the dustpan-shaped section of turning to and oviduct rectification section 3 sections along water (flow) direction, and each section has different geometric properties and effect; Partition for realigning water flow is set at the middle part of straight entry section, anti-whirlpool dividing plate is set at the middle part of the dustpan-shaped section of turning to; The relative value that it is a reference value that the geometric parameter of each section of described dustpan-shaped water inlet flow channel adopts with water pump vane diameter <i>D</iGreatT.Gr eaT.GT represents, described each section of geometric parameter provides span, and the dustpan-shaped line of the described dustpan-shaped section of turning to provides various point locations and coordinate relative value.The dustpan-shaped water inlet flow channel hydraulic performance that the utility model provides is excellent, application process is easy, be highly suitable for middle-size and small-size vertical pumping plant, can be the import of water pump vane room and the Inlet flow pattern meeting the Hydraulic Design requirement is provided, substantially increase the reliability and stability of pumping station operation.

Description

A kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence
Technical field
The utility model belongs to hydraulic engineering pumping plant technical field, be specifically related to a kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence, be mainly used in instructing the dustpan-shaped water inlet flow channel of engineers and technicians' design and devdlop, for guarantee the safe, stable of small and medium-sized pumping station and Effec-tive Function significant.
Background technology
The water inlet flow channel of hydraulic performance excellence is the necessary condition ensureing low-lift-head pumping station water pump safety, stable and Effec-tive Function.Because the three-dimensional body of the vertical pumping plant water inlet flow channel of low lift is complicated, small and medium-sized pumping station is often by the restriction of construction team's technical level, make the construction quality of water inlet flow channel cast in situs be difficult to reach designing requirement, cause most of middle-size and small-size vertical pump station to have to for a long time adopt the open type intake pool that body is simple and Inlet flow pattern is poor.The difficulty of water inlet flow channel construction aspect badly influences the stable of small and medium-sized pumping station water pump assembly and Effec-tive Function, constrains the raising of various lots of middle-size and small-size low-lift-head pumping station its construction level.
Utility model content
The purpose of this utility model is to provide a kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence.Dustpan-shaped water inlet flow channel and vertical-type axial-flow pump, guide vane mixed flow pump and submersible pump support the use, its effect guides the current of Forebay of Pumping Station to turn in order and uniform shrinkage, and the water pump vane room import for vertical installation provides the Inlet flow pattern meeting the Hydraulic Design and require.Feature of the present utility model is: described dustpan-shaped water inlet flow channel is provided with straight entry section, the dustpan-shaped section of turning to and oviduct rectification section 3 sections; Partition for realigning water flow is set at the middle part of straight entry section, anti-whirlpool dividing plate is set at the middle part of the dustpan-shaped section of turning to; The relative value that it is a reference value that the geometric parameter of each section of described dustpan-shaped water inlet flow channel adopts with water pump vane diameter D represents, and provides the span of each geometric parameter.Dustpan-shaped water inlet flow channel not only hydraulic performance is excellent, and can realize factorial praluction and building-site assembling easily, is ensureing, under the prerequisite that water inlet flow channel hydraulic performance meets the demands, to greatly reduce the requirement to small and medium-sized pumping station site operation technical level.
First object of the present utility model is achieved through the following technical solutions, a kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence, it is provided with straight entry section, the dustpan-shaped section of turning to and oviduct rectification section 3 sections along water (flow) direction, and each section has different geometric properties and effect; Each geometric parameter relative value of described dustpan-shaped water inlet flow channel represents (with water pump vane diameter D for a reference value, the unit of D is m, lower same), and dustpan-shaped water inlet flow channel import is 3.0D, tunnel inlets width B to the horizontal range L of Pump Axle center line 1for 2.57D, water pump vane center line are to the distance H of runner base plate wfor 1.61D;
Described straight entry section is positioned at the front end of described dustpan-shaped water inlet flow channel, arranges Partition for realigning water flow in the middle part of straight entry section, and the effect of straight entry section guides current to enter runner from Forebay of Pumping Station; The feature of straight entry section is runner upper sideline is circular arc, and lower sideline and plane sideline are straight line, and section configuration is rectangle; The length L of straight entry section jkfor the width B of 1.99D, admission section 1and height H 1be respectively 2.57D and 1.45D, upper sideline arc radius R=3.2D; Partition for realigning water flow shape set in the middle part of straight entry section is consistent with the shape of the longitudinal symmetrical plane of straight entry section, the thickness B of Partition for realigning water flow gbfor (0.05D+0.075) m, Partition for realigning water flow front shape is semicircle, semicircle radius R gtfor 0.5B gb;
After the described dustpan-shaped section of turning to is positioned at straight entry section, arrange anti-whirlpool dividing plate in the middle part of the dustpan-shaped section of turning to, the effect of the dustpan-shaped section of turning to guides current to do 90 ° in an orderly manner to turn to, and whirlpool, the contingent attached end is eliminated in the effect of described anti-whirlpool dividing plate; The feature of the dustpan-shaped section of turning to is that the upper sideline in facade direction is straight line, lower sideline is dustpan-shaped line, and the sideline of in-plane is straight line and semicircular connecting line; The length L of the dustpan-shaped section of turning to bjfor the width B of 1.98D, admission section 2and height H 2be respectively 2.57D and 0.77D, the straight length L in described in-plane sideline bzfor 0.69D, semicircular radius R bjfor 1.28D, the center of circle are positioned at apart from the longitudinal centre line of the dustpan-shaped section of turning to admission section 0.69D; There is provided the data of described dustpan-shaped line in table 1, the data in this table comprise the relative value of each point numbering and coordinate; In the middle part of the dustpan-shaped section of turning to the shape of whirlpool dividing plate of setting up defences consistent with the shape of the longitudinal symmetrical plane of the dustpan-shaped section of turning to, anti-whirlpool block board thickness B gbfor (0.05D+0.075) m; The shaped upper part of described anti-whirlpool dividing plate is semicircle, semicircle radius R gtfor 0.5B gb;
The relative value of the dustpan-shaped line each point numbering of the dustpan-shaped section of turning to of table 1 and coordinate
Described oviduct rectification section is positioned at the top of the dustpan-shaped section of turning to, and the effect of oviduct rectification section does last adjustment, to enter blade wheel chamber with ensureing uniform fluid flow to the current flowing out the dustpan-shaped section of turning to; The height H of oviduct rectification section lbfor 0.68D, admission section diameter D b1with Outlet Section diameter D b2be respectively 1.41D and 0.95D, the line style of oviduct bus is 1/4 ellipse, oval major axis radius R tcwith minor axis radius R tdbe respectively 0.68D and 0.23D.
Compared with prior art, the utility model has following beneficial effect:
The first, the dustpan-shaped water inlet flow channel that the utility model provides is provided with straight entry section, the dustpan-shaped section of turning to and oviduct rectification section 3 sections along water (flow) direction, in the middle part of straight entry section, arrange Partition for realigning water flow, arranges anti-whirlpool dividing plate in the middle part of the dustpan-shaped section of turning to; Described straight entry section is for guiding Forebay of Pumping Station incoming flow; The described dustpan-shaped section of turning to turns to for making current do 90 °; Described anti-whirlpool dividing plate is used for eliminating whirlpool, the contingent attached end in flow direction-changing process; Described oviduct rectification section is used for the current that adjustment further flows into from the dustpan-shaped section of turning to, and makes it flow to the import of water pump vane room even, straightly; The dustpan-shaped water inlet flow channel hydraulic performance that application the utility model obtains is excellent, and its main hydraulic performance index is: velocity flow profile uniformity V u> 96.5%, water inflow pump average angle head loss Δ h < 0.15m during design discharge;
Second, the dustpan-shaped water inlet flow channel strong adaptability that the utility model provides, the all sizes of runner all represent by relative value (with water pump vane diameter D for a reference value), for general middle-size and small-size vertical pumping plant, these relative values are multiplied by the water pump vane diameter D intending application pumping plant of the present utility model and can obtain required channel size, studying without the need to carrying out the complicated Optimum Hydraulic Design based on CFD, being convenient to engineers and technicians and adopting;
3rd, the anti-whirlpool dividing plate of the Partition for realigning water flow of the straight entry section of the dustpan-shaped water inlet flow channel that the utility model provides, the dustpan-shaped section of turning to, oviduct rectification section and straight entry section, the dustpan-shaped section of turning to is independently reinforced concrete prefabricated parts, each parts are at produce in factory, site assembly is carried out after being transported to pumping plant building site, application process is easy, under the prerequisite ensureing small and medium-sized pumping station water inlet flow channel construction quality, greatly reduce the requirement to construction technology.
Accompanying drawing explanation
Fig. 1 is the longitudinal single line drawing of dustpan-shaped water inlet flow channel of the present utility model;
Fig. 2 is dustpan-shaped water inlet flow channel planar single-line figure of the present utility model;
Fig. 3 is the drawing of site of dustpan-shaped line each point of the present utility model;
In figure: 1 straight entry section, the 2 dustpan-shaped sections of turning to, 3 oviduct rectification sections, 4 Partition for realigning water flow, 5 anti-whirlpool dividing plates, 6 upper sidelines, 7 lower sidelines, 8 plane sidelines, 9 oviduct buses.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment
Certain medium-sized vertical type low-lift-head pumping station, this station adopts dustpan-shaped water inlet flow channel, water pump vane diameter D=1.2m.
1. the dustpan-shaped water inlet flow channel of hydraulic performance excellence that provides of the utility model, as depicted in figs. 1 and 2;
(1) described dustpan-shaped water inlet flow channel is provided with straight entry section 1, the dustpan-shaped section of turning to 2 and oviduct rectification section 3 along water (flow) direction, the middle part of straight entry section 1 arranges Partition for realigning water flow 4, the middle part of the dustpan-shaped section of turning to 2 arranges anti-whirlpool dividing plate 5, and each section has different geometric properties and effect;
(2) described straight entry section 1 is positioned at the front end of described dustpan-shaped water inlet flow channel, and the middle part of straight entry section 1 arranges Partition for realigning water flow 4, and the effect of straight entry section 1 guides current to enter runner from Forebay of Pumping Station; The feature of straight entry section 1 is runner upper sideline 6 is circular arc, and lower sideline 7 and plane sideline 8 are straight line, and section configuration is rectangle;
(3) after the described dustpan-shaped section of turning to 2 is positioned at straight entry section 1, the middle part of the dustpan-shaped section of turning to 2 arranges anti-whirlpool dividing plate 5, the effect of the dustpan-shaped section of turning to 2 guides current to do 90 ° in an orderly manner to turn to, and whirlpool, the contingent attached end is eliminated in the effect of described anti-whirlpool dividing plate 5; The feature of the dustpan-shaped section of turning to 2 is that the upper sideline 6 in facade direction is straight line, lower sideline 7 is dustpan-shaped line, and the sideline 8 of in-plane is straight line and semicircular connecting line;
(4) described oviduct rectification section 3 is positioned at the top of the dustpan-shaped section of turning to 2, and the effect of oviduct rectification section 3 does last adjustment, to enter blade wheel chamber with ensureing uniform fluid flow to the current flowing out the dustpan-shaped section of turning to 2.
2. each geometric parameter relative value of the dustpan-shaped water inlet flow channel provided by the utility model is multiplied by 1.2m, obtains the actual geometry of the dustpan-shaped water inlet flow channel of described pumping plant;
(1) the dustpan-shaped water inlet flow channel import of described pumping plant is 3.60m, tunnel inlets width B to the horizontal range L of Pump Axle center line 1for 3.08m, water pump vane center line are to the distance H of runner base plate wfor 1.93m;
(2) the length L of straight entry section 1 jkfor the width B of 2.39m, admission section 1and height H 1be respectively 3.08m and 1.74m, the arc radius R of upper sideline 6 is 3.84m; The shape of Partition for realigning water flow 4 set in the middle part of straight entry section 1 is consistent with the shape of longitudinal symmetrical plane of straight entry section 1, the thickness B of Partition for realigning water flow 4 gbfor 0.135m, the front shape of Partition for realigning water flow 4 is semicircle, semicircle radius R gtfor 0.0675m;
(3) the length L of the dustpan-shaped section of turning to 2 bjfor the width B of 2.38m, admission section 2and height H 2be respectively 3.08m and 0.92m, the straight length L in described in-plane sideline 8 bzfor 0.828m, semicircular radius R bjfor 1.54m, the center of circle are positioned at apart from the longitudinal centre line of the dustpan-shaped section of turning to 2 admission section 0.828m; As shown in Figure 3, each point numbering and coordinate value list in table 3, and Biao Zhong unit is m for described dustpan-shaped line each point numbering and position; In the middle part of the dustpan-shaped section of turning to 2 the shape of whirlpool dividing plate 5 of setting up defences consistent with the shape of longitudinal symmetrical plane of the dustpan-shaped section of turning to 2, the thickness B of anti-whirlpool dividing plate 5 gbfor 0.135m; The shaped upper part of described anti-whirlpool dividing plate 5 is semicircle, semicircle radius R gtfor 0.0675m;
The dustpan-shaped line each point numbering of the dustpan-shaped section of turning to of table 3 the present embodiment and coordinate value
(4) height H of oviduct rectification section 3 lbfor 0.82m, admission section diameter D b1with Outlet Section diameter D b2be respectively 1.69m and 1.14m, the line style of oviduct bus 9 is 1/4 ellipse, oval major axis radius R tcwith minor axis radius R tdbe respectively 0.82m and 0.28m.

Claims (2)

1. a dustpan-shaped water inlet flow channel, it is characterized in that, described dustpan-shaped water inlet flow channel is provided with straight entry section, the dustpan-shaped section of turning to and oviduct rectification section successively along water (flow) direction, in the middle part of straight entry section, Partition for realigning water flow is set, arrange anti-whirlpool dividing plate in the middle part of the dustpan-shaped section of turning to, each section has different geometric properties and effect;
Each geometric parameter relative value of described dustpan-shaped water inlet flow channel represents, with water pump vane diameter D for a reference value, the unit of D is m; Dustpan-shaped water inlet flow channel import is 3.0D, tunnel inlets width B to the horizontal range L of Pump Axle center line 1for 2.57D, water pump vane center line are to the distance H of runner base plate wfor 1.61D;
Described straight entry section is positioned at the front end of described dustpan-shaped water inlet flow channel, and the effect of straight entry section guides current to enter runner from Forebay of Pumping Station; The feature of straight entry section is runner upper sideline is circular arc, and lower sideline and plane sideline are straight line, and section configuration is rectangle; The length L of straight entry section jkfor the width B of 1.99D, admission section 1and height H 1be respectively 2.57D and 1.45D, upper sideline arc radius R=3.2D; Partition for realigning water flow shape set in the middle part of straight entry section is consistent with the shape of the longitudinal symmetrical plane of straight entry section, the thickness B of Partition for realigning water flow gbfor (0.05D+0.075) m, Partition for realigning water flow front shape is semicircle, semicircle radius R gtfor 0.5B gb;
After the described dustpan-shaped section of turning to is positioned at straight entry section, the effect of the dustpan-shaped section of turning to guides current to do 90 ° in an orderly manner to turn to, and whirlpool, the contingent attached end is eliminated in the effect of described anti-whirlpool dividing plate; The feature of the dustpan-shaped section of turning to is that the upper sideline in facade direction is straight line, lower sideline is dustpan-shaped line, and the sideline of in-plane is straight line and semicircular connecting line; The length L of the dustpan-shaped section of turning to bjfor the width B of 1.98D, admission section 2and height H 2be respectively 2.57D and 0.77D, the straight length L in described in-plane sideline bzfor 0.69D, semicircular radius R bjfor 1.28D, the center of circle are positioned at apart from the longitudinal centre line of the dustpan-shaped section of turning to admission section 0.69D; The relative value of described dustpan-shaped line each point numbering and coordinate is provided; In the middle part of the described dustpan-shaped section of turning to the shape of whirlpool dividing plate of setting up defences consistent with the shape of the longitudinal symmetrical plane of the dustpan-shaped section of turning to, anti-whirlpool block board thickness B gbfor (0.05D+0.075) m; The shaped upper part of described anti-whirlpool dividing plate is semicircle, semicircle radius R gtfor 0.5B gb;
Described oviduct rectification section is positioned at the top of the dustpan-shaped section of turning to, and the effect of oviduct rectification section does last adjustment, to enter blade wheel chamber with ensureing uniform fluid flow to the current flowing out the dustpan-shaped section of turning to; The height H of oviduct rectification section lbfor 0.68D, admission section diameter D b1with Outlet Section diameter D b2be respectively 1.41D and 0.95D, the line style of oviduct bus is 1/4 ellipse, oval major axis radius R tcwith minor axis radius R tdbe respectively 0.68D and 0.23D.
2. the dustpan-shaped water inlet flow channel of one according to claim 1, is characterized in that, numbering and the coordinate relative value of described dustpan-shaped line each point list in table 1;
The relative value of the dustpan-shaped line each point numbering of the dustpan-shaped section of turning to of table 1 and coordinate
CN201520411029.9U 2015-06-15 2015-06-15 A kind of dustpan-shaped water inlet flow channel of hydraulic performance excellence Withdrawn - After Issue CN204728395U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104895145A (en) * 2015-06-15 2015-09-09 扬州大学 Dustpan-shaped inflow channel with excellent hydraulic performance and application method of dustpan-shaped inflow channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104895145A (en) * 2015-06-15 2015-09-09 扬州大学 Dustpan-shaped inflow channel with excellent hydraulic performance and application method of dustpan-shaped inflow channel

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Granted publication date: 20151028

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C25 Abandonment of patent right or utility model to avoid double patenting