CN209619962U - A kind of anti-whirlpool device of rectification - Google Patents
A kind of anti-whirlpool device of rectification Download PDFInfo
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- CN209619962U CN209619962U CN201920060901.8U CN201920060901U CN209619962U CN 209619962 U CN209619962 U CN 209619962U CN 201920060901 U CN201920060901 U CN 201920060901U CN 209619962 U CN209619962 U CN 209619962U
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Abstract
The utility model discloses a kind of anti-whirlpool devices of rectification, rectify anti-whirlpool device and are arranged in inverted-siphon water inlet upstream stem, and exhaust is arranged in import forebay stem and rises bank, rectification curtain wall and the anti-whirlpool hole of water conservancy diversion.Exhaust rises bank and eliminates the bubble for entering forebay water flow；Water level fluctuation caused by curtain wall barrier down stream stilling pond energy dissipating is rectified to propagate to forebay；The outlet stream in the anti-whirlpool hole of water conservancy diversion enters forebay in the form of flooding, and in unhurried current fluidised form, makes to enter inverted-siphon water inlet into water stream steady and smooth, avoids that flow-shape conversion occurs in forebay and generates vortex phenomenon before water inlet.Utility model has the advantages that avoiding water flow energy dissipating in forebay causes gas-vapor mix flow problem, to adapt to being widely varied caused by the water level of the frontal pool changes because of service condition；The unfavorable flowing to form whirlpool is eliminated, harmful whirlpool will not be formed before keeping water inlet in the case where the water level of the frontal pool variation；To maintain the even running of inverted-siphon pipeline, enhance the security performance of inverted-siphon conduit running.
Description
Technical field
The utility model relates to inverted-siphon pipeline water delivery engineering technical field, in particular to a kind of anti-whirlpool device of rectification.
Background technique
When inverted-siphon pipeline is water delivery engineering crossing river channel and other obstructions frequently with a kind of overcurrent crossing,
Inverted-siphon pipeline is in flowing full state under normal operation, belongs to pressure flow in pipe.Between inverted-siphon conduit entrance and outlet
Water-head size depends on head loss (including the linear loss h between inverted-siphon pipeline inlet and outletfWith local losses hi).
Head loss and water diversion flow, duct length, section configuration size, axis arrangement and pipeline between siphon piping import and export
The factors such as surface roughness are related, if the section configuration and size of inverted-siphon pipeline remain unchanged, inverted-siphon pipeline
Frictional head loss can be calculated by formula (1):
Its local head loss is calculated by formula (2):
In formula (1) and formula (2): hfThe linear loss of-inverted-siphon pipeline, n-pipe surface roughness coefficien, L-pipeline are long
Degree, R-pipeline hydraulic radius, A-pipeline cross-section of river cross sectional area, Q-pipeline water delivery flow, hi- pipeline
Local losses,The local loosening of-pipeline.
Conduit axis arrangement and section configuration size have determined in the case where, the size of head loss still with
The difference of water diversion flow and pipe surface roughness and change.When the changes in flow rate range of water delivery engineering during operation is larger, or
Person's inverted-siphon pipeline is longer, and it is changed that pipe surface roughness coefficien is difficult to its surface roughness in accurately estimation or operational process
In the case of, such as the surface roughness coefficient n in Prestressed concrete cylinder pipe road may be between 0.011~0.0135, so
Siphon piping inlet and outlet between head loss can also differ larger so that inverted-siphon engineering during normal operation its into
Water-head between mouth and outlet is widely varied.However, the elevation of the canal for water conveyance of inverted-siphon conduit entrance upstream and downstream
It is often determined according to the special service condition of some of orographic condition and water delivery engineering, when designing under normal circumstances most according to conveying
Big water diversion flow QmaxCome determine inverted-siphon import upstream and outlet downstream canal for water conveyance elevation and section size.Inverted-siphon
The water level of import upstream flume and the difference of the water level in outlet downstream conveyance canal are relatively fixed, it is impossible to inverted-siphon pipeline
Head loss size and change, this water level that will result in inverted-siphon import forebay 7 is widely varied.7 water level of forebay is significantly
The problem of variation often causes in terms of following two: (1) water inlet depth of immersion deficiency form Air-core Vortex and roll up suck into
Enter inverted-siphon pipeline；(2) the water level of the frontal pool reduces, and causes flume water flow to enter forebay with torrent fluidised form, and generate in forebay
Hydraulic jump forms water-air two phase flow, carries under one's arms a large amount of bubbles and enter inverted-siphon pipeline.Air into inverted-siphon pipeline is easily assembled and to be formed
Air bag, it is unstable that air bag with the variation oscillation of pressure oscillation not only may cause pipeline water flow, and surge pressure increases, and may
Cause gas explosion phenomenon, induces safety accident.
For the inverted-siphon pipeline head due to caused by the change of water diversion flow and pipe surface roughness during solving operation
Loss variation, the problem of causing inverted-siphon pipeline air-inlet and fluctuation of service, such as Fig. 1 are greatly lowered so as to cause the water level of the frontal pool
Shown, existing technical solution is that one of regulating gate is arranged in inverted-siphon pipe outlet section.Inverted-siphon carrying capacity of pipe is pressed
Go out port strobe standard-sized sheet according to inverted-siphon, pipe surface roughness may maximum value nmaxIn the case of pass through diversion maximum stream flow QmaxIt is set
Meter.For other non-design operating conditions that water diversion flow and pipe surface roughness reduce, regulating gate can be taken locally to open
The method of operation opened makes the water level of the frontal pool in the safe operation water level section for being able to maintain that inverted-siphon pipeline, to guarantee inverted-siphon work
The normal operation of journey.
But this method has the following deficiencies:
1) aperture for needing to control out port strobe according to the surface roughness of inverted siphon and the size of water diversion flow, before adjusting
Pool water level, operational administrative process is more many and diverse during operation；
2) inverted-siphon water diversion engineering flow, which changes, needs to adjust outlet gatage, for being up to several kilometers of the rainbow that falls
Suction pipe road, gatage variation is too fast, and to may cause Pipeline Water Hammer pressure excessive；On the other hand, if gate in the process of running
Lockout failure and closing of falling suddenly, it is also possible to cause excessive surge pressure to make pipeline breaking, there are some potential safety problemss.
3) the water level of the frontal pool is raised using the measure that gate is locally run, increases inverted siphon road outlet stream flow velocity, out
Mouth needs to design energy-dissipating installation, and the flow stability in the flume of downstream is poor.
Harmful air-breathing whirlpool is generated before inverted-siphon water inlet in order to prevent, air is avoided to enter inverted-siphon pipeline and cause water
Flowing pressure fluctuation, existing another technical solution is that several whirlpool beams that disappear are arranged in the top for closing on water inlet, passes through the whirlpool that disappears
The interference of beam prevents to form circulation flowing before water inlet, to avoid there is air-breathing whirlpool, prevents vortices entrain air from entering to fall
Siphon piping.
The technical solution only can solve the problem of air-breathing whirlpool occurs before inverted siphon road water inlet.Water delivery flow is become
Change the operating condition for changing with pipe surface roughness and the water level of the frontal pool being caused to reduce, before the water flow of flume is entered with torrent fluidised form
Pond, and generating energy dissipation by hydraulic jump in forebay steeps water body incorporation large quantity of air, water-borne bubble enters asking for inverted-siphon pipeline
Topic, existing technical solution not can solve.Meanwhile water surface fluctuation caused by water flow energy dissipating also will affect down rainbow in forebay
The even running in suction pipe road.
Utility model content
The utility model in view of the drawbacks of the prior art, provides a kind of anti-whirlpool device of rectification, can effectively solve above-mentioned
Problem of the existing technology.
In order to realize that the above purpose of utility model, the technical solution that the utility model is taken are as follows:
A kind of anti-whirlpool device of rectification, comprising: down stream stilling pond 1, end sill 2, snorkel 3, rectification curtain wall 4, the anti-whirlpool hole of water conservancy diversion
5, exhaust rises bank 6, forebay 7, water inlet 8 and dividing pier 9；
Down stream stilling pond 1 sets end sill 2 close to flume, 1 end of down stream stilling pond to form energy dissipating water cushion, sets after end sill 2
Flow-passing surface after bank is communicated with the atmosphere in snorkel 3；
Down stream stilling pond 1 has multistage, and the step height of every level-one down stream stilling pond 1 is generally 3.0~6.0m, last
Arranging exhaust air rises bank 6 on 1 tail portion bottom plate of level-one down stream stilling pond；
Arrangement rectification curtain wall 4 and the anti-whirlpool hole 5 of water conservancy diversion at 6 3.0~5.0m of downstream of bank are risen in exhaust, the anti-whirlpool hole 5 of water conservancy diversion exports
It is directly accessed forebay 7, water inlet 8 is arranged in 7 end of forebay.
The anti-whirlpool hole 5 of water conservancy diversion is located between afterbody down stream stilling pond 1 and forebay 7, and overcurrent cross section is in rectangle, water conservancy diversion
Anti- 5 width of whirlpool hole and forebay 7 are of same size, and the exit aperture height in the anti-whirlpool hole 5 of water conservancy diversion is slow according to the water flow for entering forebay 7
It flows fluidised form to determine, to keep waterflow stabilization, outlet maximum flow of water Froude nmuber desirable 0.50~0.70.
Rectification curtain wall 4 is located at the anti-5 import top of whirlpool hole of water conservancy diversion, and rectification curtain wall 4 is arranged vertically, rectangular, rectifies curtain wall 4
Width and forebay 7 it is of same size, rectify and be higher than 7 peak level of forebay at the top of curtain wall 4, rectify be approximately higher than at the top of curtain wall 4 it is last
The peak level of level-one down stream stilling pond 1 during normal operation.It rectifies curtain wall 4 and separates 1 water surface of down stream stilling pond and 7 water of forebay
The connection in face prevents water level fluctuation caused by down stream energy dissipating from traveling in forebay 7, avoids influencing the water flow in forebay 7 and pipeline
Stablize.
Exhaust rises bank 6 and is located on the bottom plate of the afterbody down stream stilling pond 1 before the anti-whirlpool hole 5 of water conservancy diversion, and exhaust rises 6 bank location of bank
It is 3.0~5.0m to the anti-whirlpool hole import distance of water conservancy diversion, rises bank cope level and be higher than the import floor elevation in the anti-whirlpool hole 5 of water conservancy diversion about
0.5m.Exhaust rises 6 confinement of flow of bank flow direction top, is bent by streamline and the bubble for being involved in water body in down stream energy dissipation is accelerated to float
It moves and floats, water-borne bubble is avoided to enter forebay 7 through the anti-whirlpool hole 5 of water conservancy diversion.
Snorkel 3 generally uses circular pipe, and the outlet of snorkel 3 is arranged in the end sill 2 of down stream stilling pond 1 close to bank
The downstream face on top, outlet use the circular hole of aperture about 10cm, and snorkel 3 exports number according to the width of 1 end sill 2 of down stream stilling pond
It determines.
Preferably, the length L of down stream stilling pond 1 falls length l by overflow1Stop up high hydraulic jump length l with down stream2Composition, root
Maximum discharge per unit width according to step height and during normal operation determines.Overflow, which falls length, to be estimated by formula (3):
In formula (1): q-falls the discharge per unit width of Kan Chu；P-step height；h0- incoming flow the depth of water.For falling for high bank overflow
Falling distance can be estimated with formula (4):
Down stream stops up high hydraulic jump length:
l2=3.2h2 (5)
In formula (5): h2- down stream hydraulic jump the second sequent depth is calculated by hydraulic jump formula.
Preferably, the series of down stream stilling pond 1 depends on inverted-siphon engineering 8 forebay of water inlet, 7 water during normal operation
The variation range of position；Assuming that the water level maximum changing value of water inlet forebay is Δ Hmax, then the series N of down stream stilling pond presses formula (6)
It calculates:
N=Δ Hmax/ (3~6) (6)
Preferably, 1 end end sill of down stream stilling pond, 2 height is and afterbody between the 1/3~1/4 of step height
The height of down stream stilling pond 1 reduces 0.3~0.6m；Its length increases length 3m.
Preferably, the outlet top plate elevation in the anti-whirlpool hole 5 of water conservancy diversion is lower than 7 minimum operation water level of forebay, keep outlet minimum
Depth of immersion is not less than 0.5m, and in anti-5 import of whirlpool hole of water conservancy diversion, lower edge is all made of circular arc camber or oval calotte cavetto, with benefit into
Mouth smooth in water flow is stablized.
Preferably, the anti-whirlpool hole 5 of water conservancy diversion and forebay 7 are by the dividing pier 9 arranged along water (flow) direction according to the root of inverted-siphon pipeline
Number be uniformly divided into it is porous, so that each inverted-siphon pipeline can keep the water flow of forebay suitable under independent and united service condition
Freely.
Compared with prior art utility model has the advantages that
1) the utility model passes through extra between multistage down stream stilling pond consumption flume and forebay normal operation water level
Energy, so that energy needed for the flow energy of afterbody down stream stilling pond is operated normally with forebay matches, multistage down stream disappears
Power pond can automatically adjust the water level of afterbody down stream stilling pond according to the incoming flow situation of flume, avoid water flow in forebay and disappear
It can cause gas-vapor mix flow problem, to adapt to being widely varied caused by the water level of the frontal pool changes because of service condition.
2) it realizes and maintains unhurried current fluidised form under different service conditions in forebay always, will not be sent out because service condition changes
Change of flow state is given birth to, mainstream flow trace is relatively fixed in forebay, and the circumferential water flow before avoiding water inlet eliminates to form whirlpool
Unfavorable flowing, so as in the case where the water level of the frontal pool is widely varied keep water inlet before will not form harmful whirlpool.
3) water surface in energy dissipating area is isolated by rectification curtain wall with the forebay water surface and is separated, water flow energy dissipating region and forebay are mutual
It is independent, the influence that water surface fluctuation flows forebay water flow caused by water flow energy dissipating is eliminated, the forebay water surface is effectively reduced
Fluctuation；The scavenging action that bank is risen by exhaust avoids the bubble inflow forebay that water flow is involved in down stream energy dissipation, to maintain
The even running of inverted-siphon pipeline.
4) without changing gatage when inverted-siphon engineering water flow changes, caused by avoiding gatage from changing
Surge pressure can enhance the security performance of inverted-siphon conduit running.
5) being widely varied for the water level of the frontal pool can be adapted to automatically, simplify the operational management process of inverted-siphon engineering.
Detailed description of the invention
Fig. 1 is the vertical section schematic diagram of prior art inverted-siphon pipeline；
Fig. 2 is that the utility model rectifies anti-whirlpool device perspective view in fact；
Fig. 3 is the structural schematic diagram that the utility model embodiment 1 rectifies anti-whirlpool device；
Fig. 3 A is that the utility model embodiment 1 rectifies anti-whirlpool device vertical section schematic diagram；
Fig. 3 B is that the utility model embodiment 1 rectifies anti-whirlpool device plane structure chart.
A number represents meaning in figure are as follows: 1, down stream stilling pond；2, end sill；3, snorkel；4, curtain wall is rectified；5, water conservancy diversion
Anti- whirlpool hole；6, exhaust rises bank；7, forebay；8, water inlet；9, dividing pier.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, develop simultaneously implementation below in conjunction with attached drawing
Example, is described in further details the utility model.
Embodiment 1
As shown in Figure 2,3, the inverted-siphon duct length about 11000m in the present embodiment is arranged side by side two internal diameter 2.8m's
Prestressed concrete pipe, water diversion flow during normal operation are 16.0~39.0m3/ s, pipeline roughness coefficien value interval are
0.012~0.013, the head loss between inverted-siphon inlet and outlet between 16.6m between 28.8m, it is preceding under normal operation
The amplitude of variation of pool water level about 12.0m.
The structure of anti-whirlpool device is rectified as shown in Fig. 2, including falling with the three-level down stream stilling pond 1 against flume, three-level
The falling height of stream stilling pond 1 is respectively 4.5m, 4.5m and 4.1m, is wanted with meeting the amplitude of variation of 7 water level of forebay and 12.0m
It asks.Set tail sill 2 in the end of down stream stilling pond 1, choke water stilling pond with meet form down stream hydraulic jump needed for the water cushion depth of water.Often
In the case of the pond length and 2 height of tail sill of level-one down stream stilling pond 1 are according to engineering maximum water diversion flow during operation, down stream stilling pond
Rule of thumb formula is designed calculating for the interior stable requirement for flooding water flow of formation:
h1、h2Conjugate depth (m) before and after-hydraulic jump, hk- corresponding to the critical depth of water (m) of maximum water diversion flow；P-falls
Bank height (m).
The length of down stream stilling pond 1 is that overflow falls the sum of distance and hydraulic jump length, and overflow falls distance are as follows:
The long l of the jump of down stream hydraulic jump2Are as follows:
l2=3.2h2 (10)
The height a of tail sill are as follows:
A=σ h2-h3 (11)
In formula: a- tail sill height (m)；σ-hydraulic jump floods coefficient, generally takes 1.05~1.1；h3The bank top depth of water of-tail sill
(m).Down stream stilling pond width is 13.0m, and maximum water diversion flow is 39.0m3/ s is calculated three-level and is disappeared by formula (1)~formula (5)
The length in power pond is respectively 13.42m, 13.42m and 13.19m, and tail sill height is respectively 1.37m, 1.37m and 1.33m.
Exhaust on 1 heel slab of third level down stream stilling pond, which rises bank, can have both third level down stream stilling pond 1
Tail sill function, the cope level that exhaust rises bank 6 is higher than the anti-5 import floor elevation about 0.5m of whirlpool hole of water conservancy diversion or its height is desirable
1.5~2.0 times of corresponding tail sill height.It is risen in exhaust and rectification curtain wall 4 is set at 3~5m after bank 6, the wall top for rectifying curtain wall 4 is high
In highest operating water level (superelevation value 0.3m).The anti-whirlpool hole 5 of water conservancy diversion and forebay 7 are symmetrically divided into two by the dividing pier 9 arranged along center line
Hole, so that two inverted-siphon pipelines can keep the smooth in water flow of forebay under independent and united service condition.Water conservancy diversion is anti-
The width in whirlpool hole 5 is of same size with forebay 7, is 5.0m, and the height that the anti-whirlpool hole 5 of water conservancy diversion exports is according to maximum water diversion flow
39m3When/s, the control condition that the water flow Froude nmuber of outlet stream is 0.5 is designed, its exit aperture height of the calculation shows that is
1.8m, the anti-whirlpool hole 5 of water conservancy diversion export cope level and are lower than the lowest water level about 1.0m that forebay 7 operates normally, to guarantee to be prevented by water conservancy diversion
Whirlpool hole 5 flows into the water flow of forebay under normal operating conditions all in unhurried current fluidised form, combines reduction water level fluctuation, stablizes water
Stream.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this reality
With novel implementation method, it should be understood that the protection scope of the utility model is not limited to such special statement and implementation
Example.Those skilled in the art can make according to the technical disclosures disclosed by the utility model various does not depart from this reality
With novel substantive various other specific variations and combinations, these variations and combinations are still in the protection scope of the utility model
It is interior.
Claims (6)
1. a kind of anti-whirlpool device of rectification characterized by comprising down stream stilling pond (1), end sill (2), snorkel (3), rectification curtain
The anti-whirlpool hole (5) of wall (4), water conservancy diversion, exhaust rise bank (6), forebay (7) and water inlet (8)；
Down stream stilling pond (1) sets end sill (2) close to flume, down stream stilling pond (1) end to form energy dissipating water cushion, end sill (2)
After set snorkel (3) and occur negative pressure and stablizing down stream to avoid flow-passing surface after bank；
Down stream stilling pond (1) has multistage, and the step height of every level-one down stream stilling pond (1) is generally 3.0~6.0m, at last
Arranging exhaust air rises bank (6) on the bottom plate of grade down stream stilling pond (1) tail portion；
Arrangement rectification curtain wall (4) and the anti-whirlpool hole (5) of water conservancy diversion, the anti-whirlpool hole (5) of water conservancy diversion at bank (6) 3.0~5.0m of downstream are risen in exhaust
Outlet is directly accessed forebay (7), and water inlet (8) is arranged in forebay (7) end；
The anti-whirlpool hole (5) of water conservancy diversion is located between afterbody down stream stilling pond (1) and forebay (7), and overcurrent cross section is in rectangle, leads
It flows anti-whirlpool hole (5) width and forebay (7) is of same size, the exit aperture height of the anti-whirlpool hole (5) of water conservancy diversion is according to entrance forebay (7)
Water flow is that unhurried current fluidised form determines, to keep waterflow stabilization, outlet maximum flow of water Froude nmuber takes 0.50~0.70；
Rectification curtain wall (4) is located at anti-whirlpool hole (5) the import top of water conservancy diversion, and rectification curtain wall (4) is arranged vertically, rectangular, rectifies curtain
The width of wall (4) and forebay (7) are of same size, and forebay (7) peak level, rectification curtain wall (4) top are higher than at the top of rectification curtain wall (4)
Portion is approximately higher than the peak level of afterbody down stream stilling pond (1) during normal operation；It rectifies curtain wall (4) and separates down stream stilling pond
(1) connection of the water surface and forebay (7) water surface prevents water level fluctuation caused by down stream energy dissipating from traveling in forebay (7), avoids its water
Face influence of fluctuations forebay (7) waterflow stabilization；
Exhaust rises bank (6) and is located on the bottom plate of the afterbody down stream stilling pond (1) before the anti-whirlpool hole (5) of water conservancy diversion, and exhaust rises bank (6)
Bank location to the anti-whirlpool hole import distance of water conservancy diversion is 3.0~5.0m, rises the import bottom plate height that bank cope level is higher than the anti-whirlpool hole (5) of water conservancy diversion
Journey about 0.5m；Exhaust rises bank (6) confinement of flow flow direction top, is bent by streamline and accelerates to be involved in water body in down stream energy dissipation
Bubble drift is floated, and water-borne bubble is avoided to enter forebay (7) through the anti-whirlpool hole (5) of water conservancy diversion；
Snorkel (3) generally uses circular pipe, and the end sill (2) that the outlet of snorkel (3) is arranged in down stream stilling pond (1) is close
The downstream face of Kan Ding, outlet use the circular hole of aperture about 10cm, and snorkel (3) exports number according to down stream stilling pond (1) end sill
(2) width determines.
2. a kind of anti-whirlpool device of rectification according to claim 1, it is characterised in that: the length L of down stream stilling pond (1) is by water
Tongue falls length l1Stop up high hydraulic jump length l with down stream2Composition, maximum discharge per unit width according to step height and during normal operation
It determines；Overflow falls length and estimates by formula (1):
In formula (1): q-falls the discharge per unit width of Kan Chu；P-step height；h0- incoming flow the depth of water；For high bank overflow fall away from
It is estimated from formula (2):
Down stream stops up high hydraulic jump length:
l2=3.2h2 (3)
In formula (2) and formula (3): hk- fall the critical depth of water of bank water flow；h2- down stream hydraulic jump the second sequent depth, by hydraulic jump formula
It calculates.
3. a kind of anti-whirlpool device of rectification according to claim 1, it is characterised in that: the series of down stream stilling pond (1) depends on
In the variation range of the inverted-siphon import during normal operation of inverted-siphon engineering forebay (7) water level；Assuming that inverted-siphon import forebay (7)
Water level maximum changing value be Δ Hmax, then the series N of down stream stilling pond is calculated by formula (4):
N=Δ Hmax/ (3~6) (4).
4. a kind of anti-whirlpool device of rectification according to claim 1, it is characterised in that: down stream stilling pond (1) end end sill
(2) highly for step height 1/3~1/4 between, and afterbody down stream stilling pond (1) height reduce 0.3~0.6m.
5. a kind of anti-whirlpool device of rectification according to claim 1, it is characterised in that: the outlet top plate of the anti-whirlpool hole (5) of water conservancy diversion
Elevation is lower than forebay (7) minimum operation water level, keeps exporting minimum depth of immersion not less than 0.5m, anti-whirlpool hole (5) import of water conservancy diversion
On, lower edge is all made of circular arc camber or oval calotte cavetto, is stablized with sharp import smooth in water flow.
6. a kind of anti-whirlpool device of rectification according to claim 5, it is characterised in that: further include dividing pier (9), the anti-whirlpool hole of water conservancy diversion
(5) be uniformly divided by the dividing pier (9) arranged along water (flow) direction according to inverted-siphon pipeline radical it is porous, so as to every inverted-siphon pipeline
The smooth in water flow of forebay can be kept under independent and united service condition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555088A (en) * | 2019-01-14 | 2019-04-02 | 中国水利水电科学研究院 | A kind of anti-whirlpool device of rectification |
| CN118241619A (en) * | 2024-05-20 | 2024-06-25 | 中国水利水电第三工程局有限公司 | Stilling pool device |
-
2019
- 2019-01-14 CN CN201920060901.8U patent/CN209619962U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555088A (en) * | 2019-01-14 | 2019-04-02 | 中国水利水电科学研究院 | A kind of anti-whirlpool device of rectification |
| CN109555088B (en) * | 2019-01-14 | 2023-11-07 | 中国水利水电科学研究院 | Rectifying vortex-preventing device |
| CN118241619A (en) * | 2024-05-20 | 2024-06-25 | 中国水利水电第三工程局有限公司 | Stilling pool device |
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Granted publication date: 20191112 Effective date of abandoning: 20231107 |