CN107724342A - A kind of bifurcation pivot - Google Patents
A kind of bifurcation pivot Download PDFInfo
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- CN107724342A CN107724342A CN201711042934.1A CN201711042934A CN107724342A CN 107724342 A CN107724342 A CN 107724342A CN 201711042934 A CN201711042934 A CN 201711042934A CN 107724342 A CN107724342 A CN 107724342A
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- forebays
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/16—Fixed weirs; Superstructures or flash-boards therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- General Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
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- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of bifurcation pivot, including non-pressure tunnel, diffuser and Fen Shui forebays section, wherein：One end of the non-pressure tunnel is delivered to diffuser, the tunnel outlet of diffuser one end connection non-pressure tunnel, one end connection Fen Shui forebays section after reservoir water intaking；Fen Shui forebays section includes diversion dam, for dividing water；Fen Shui forebays section also includes side weir, bleeder, forebay and Fen Shui forebays；Diversion dam is U-shaped diversion dam, including the left side straight flange and right side straight flange that circular arc base is connected respectively with both side ends therewith, and the outer convex direction on the circular arc base is towards diffuser；The downstream of the forebay first row that be arranged in parallel disappears whirlpool pier and second row disappears whirlpool pier, sets three and four respectively.The automatic balance type bifurcation pivot of the present invention, can distribute the water needed for different target unit automatically, and ensure that water flow stationary enters pipeline, while can eliminate vortex and filter water source.
Description
The application be Application No. " 201610240239.5 ", the applying date be on April 18th, 2016, it is entitled " from
The divisional application of the application for a patent for invention of dynamic balance type bifurcation pivot ".
Technical field
The present invention relates to a kind of automatic balance type bifurcation pivot, belong to water conservancy projects.
Background technology
At present the country divide water building broad form in river course using check gate gates of segmental shape carry out flow control with
Carrying out being controlled current using equipment such as flowmeter and flow regulating valves in water distribution plant, operating process is complicated, time and effort consuming, if
Standby investment is big, and maintenance and replacement cycle are short, influence water supply fraction.Pressure conduit is connected for non-pressure tunnel, main use is repaiied
Forebay is built, when being supplied water to multiple target units, often due to a target unit flow changes, while is also influenceed in addition
The water supply of several targets, the operation that influences each other between each water-diversion structure is complicated, the adjustment time length of systems stabilisation normal water supply.
The situation that water diversion project supplies water to 3 or more than 3 targets at present is more and more, therefore using simple, reliable and economical
The Main way for dividing water type formula, becoming research.The water level balance Control Scheme being related to, water quality are supplied water to multiple targets certainly
The researchs such as whirlpool that disappear of dynamic filtering and forebay also more attract attention.
The content of the invention
The purpose of the present invention is：A kind of automatic balance type bifurcation pivot is provided, the mesh to be supplied water to three targets can be realized
's.
To realize the purpose of the present invention, it is achieved using following technical scheme：
A kind of bifurcation pivot, including non-pressure tunnel, diffuser and Fen Shui forebays section, wherein：
One end of the non-pressure tunnel is delivered to diffuser after reservoir water intaking, diffuser one end connection non-pressure tunnel
Tunnel exports, one end connection Fen Shui forebays section；Fen Shui forebays section includes diversion dam, for dividing water；Fen Shui forebays section is also wrapped
Include side weir, bleeder, forebay and Fen Shui forebays；Diversion dam is U-shaped diversion dam, including circular arc base and both side ends therewith
The left side straight flange and right side straight flange being respectively connected with, the outer convex direction on the circular arc base is towards diffuser；
The downstream of the forebay first row that be arranged in parallel disappears whirlpool pier and second row disappears whirlpool pier, sets three and four respectively；
The first row whirlpool pier that disappears is located at second row and disappeared the upstream of whirlpool pier；
Three first rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and this disappear whirlpool pier in face of the face of current be cylinder
Face, be plane back to the face of current, the left and right straight flange on two whirlpool Dun YuUXing weirs that disappear that first row disappears at left and right sides of the pier of whirlpool respectively between
Set every preset distance；
Four second rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and middle two second rows disappear whirlpool pier in face of water
The face of stream is plane, and back to the face face of cylinder of current, two second rows of left and right sides whirlpool pier that disappears is close to the left and right on U-shaped weir respectively
Side straight flange is set.
Described bifurcation pivot, preferably：
The disappear set location of whirlpool pier of three first rows is respectively toward to three delivery ports that four second rows disappear between the pier of whirlpool.
Described bifurcation pivot, preferably：
The disappear second row of whirlpool pier and its both sides of each first row disappears and is connected with filter screen between the pier of whirlpool.
Described bifurcation pivot, preferably：The filter screen is rotary sieve.
Described bifurcation pivot, preferably：The bifurcation pivot also includes water level self-balancing device, and the device is included in point
The level sensor that is set in the section of water forebay, the energy dissipating power station set in Fen Shui forebays section downstream, it is provided with the energy dissipating power station
The hydraulic turbine, controller；Wherein
Level sensor is used for the water level for detecting Fen Shui forebays section, and the water level signal is reached to the control in energy dissipating power station in real time
Device processed, controller are used for the aperture of the water level signal control guide vanes of water turbine according to the Fen Shui forebays section received.
Described bifurcation pivot, preferably：
Controller judges that the water level of Fen Shui forebays section is higher than the first predetermined threshold, then controls the hydraulic turbine according to the height of water level
Stator increases aperture；When controller judges that the water level of Fen Shui forebays section is less than the second predetermined threshold, then according to the height of water level, control
Guide vanes of water turbine processed reduces aperture；When controller judge Fen Shui forebays section water level the first predetermined threshold and the second predetermined threshold it
Between, then controller maintains guide vanes of water turbine aperture constant.
A kind of automatic balance type bifurcation pivot, including non-pressure tunnel, diffuser and Fen Shui forebays section, wherein：
One end of the non-pressure tunnel is delivered to diffuser after reservoir water intaking, diffuser one end connection non-pressure tunnel
Tunnel exports, one end connection Fen Shui forebays section；
Fen Shui forebays section includes diversion dam, for dividing water.
Described automatic balance type bifurcation pivot, preferably：
Fen Shui forebays section also includes side weir, bleeder, forebay and Fen Shui forebays；
Diversion dam is U-shaped diversion dam, including the left side straight flange that is connected respectively with both side ends therewith of circular arc base and right side
Straight flange, the outer convex direction on the circular arc base is towards diffuser.
Described automatic balance type bifurcation pivot, preferably：
Region on the left of U-shaped weir between straight flange and left bank forms bleeder；
Region between U-shaped weir circular arc base and left side straight flange and right side straight flange forms forebay；
Region on the right side of U-shaped weir between straight flange and side weir parallel-segment forms Fen Shui forebays.
Described automatic balance type bifurcation pivot, preferably：
Side weir includes two parts, and a part is tilting section, and its one end is connected with tunnel outlet right side, and right along water (flow) direction
Side is obliquely installed, and forms the right side hypotenuse of diffuser, and another part is parallel-segment, is set with straight flange parallel interval on the right side of U-shaped weir,
And be connected with side weir tilting section, the other end is connected with side weir parallel-segment；
Region on the right side of side weir parallel-segment and U-shaped weir between straight flange forms Fen Shui forebays, the region between side weir and right bank
Form the drain tank of automatic balance type bifurcation pivot.
Described automatic balance type bifurcation pivot, preferably：The automatic balance type bifurcation pivot also includes the dark culvert that sluices, institute
Drain tank is stated with the dark culvert that sluices to be connected.
Described automatic balance type bifurcation pivot, preferably：
Left bank includes two parts, and a part is tilting section, exports to water (flow) direction left side and sets from tunnel, forms and expands
The left side hypotenuse of section is dissipated, another part of left bank is horizontal segment, is connected with tilting section, left bank horizontal segment and straight flange on the left of U-shaped weir
Parallel interval is set, and the region on the left of left bank horizontal segment and U-shaped weir between straight flange forms bleeder, the tilting section and side weir of left bank
Tilting section between region form diffuser；
Right bank includes two parts, and a part is tilting section, since exporting tunnel with side weir tilting section spaced a predetermined distance
It is obliquely installed afterwards along on the right side of water (flow) direction, right bank another part is horizontal segment, is connected with tilting section, and the horizontal segment is right with U-shaped weir
Side straight flange be arranged in parallel, and region therebetween forms Fen Shui forebays.
Described automatic balance type bifurcation pivot, preferably：
The downstream of the forebay first row that be arranged in parallel disappears whirlpool pier and second row disappears whirlpool pier, sets three and four respectively；
The first row whirlpool pier that disappears is located at second row and disappeared the upstream of whirlpool pier；
Three first rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and this disappear whirlpool pier in face of the face of current be cylinder
Face, be plane back to the face of current, the left and right straight flange on two whirlpool Dun YuUXing weirs that disappear that first row disappears at left and right sides of the pier of whirlpool respectively between
Set every preset distance；
Four second rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and middle two second rows disappear whirlpool pier in face of water
The face of stream is plane, and back to the face face of cylinder of current, two second rows of left and right sides whirlpool pier that disappears is close to the left and right on U-shaped weir respectively
Side straight flange is set.
Described automatic balance type bifurcation pivot, preferably：
The disappear set location of whirlpool pier of three first rows is respectively toward to three delivery ports that four second rows disappear between the pier of whirlpool.
Described automatic balance type bifurcation pivot, preferably：
The disappear second row of whirlpool pier and its both sides of each first row disappears and is connected with filter screen between the pier of whirlpool.
Described automatic balance type bifurcation pivot, preferably：
The filter screen is rotary sieve.
Described automatic balance type bifurcation pivot, preferably：
The bifurcation pivot also includes water level self-balancing device, and the device is included in the water level set in the section of Fen Shui forebays and passed
Sensor, it is provided with the hydraulic turbine, controller in the energy dissipating power station of Fen Shui forebays section downstream setting, the energy dissipating power station；Wherein
Level sensor is used for the water level for detecting Fen Shui forebays section, and the water level signal is reached to the control in energy dissipating power station in real time
Device processed, controller are used for the aperture of the water level signal control guide vanes of water turbine according to the Fen Shui forebays section received.
Described automatic balance type bifurcation pivot, preferably：
Controller judges that the water level of Fen Shui forebays section is higher than the first predetermined threshold, then controls the hydraulic turbine according to the height of water level
Stator increases aperture；When controller judges that the water level of Fen Shui forebays section is less than the second predetermined threshold, then according to the height of water level, control
Guide vanes of water turbine processed reduces aperture；When controller judge Fen Shui forebays section water level the first predetermined threshold and the second predetermined threshold it
Between, then controller maintains guide vanes of water turbine aperture constant.
Compared with prior art, automatic balance type bifurcation pivot of the invention, can autobalance water level, optimize a point water
The form of diversion dam in forebay, the water needed for different target unit can be distributed automatically, and ensure to enable current steadily to enter
Enter pipeline, plus the whirlpool pier that disappears in forebay, solve forebay eddy current problem；By adding filter screen, filtering is realized
Impurity, the purpose to purify water；Under the conditions of different operating conditions, water surface curve is steady in automatic balance type bifurcation pivot, ripple
High level mean square deviation is small, and overall flow velocity is smaller, and flow-shape is good；Diffuser produces without obvious disorderly fluidised form；U-shaped diversion dam makes
Obtain current and almost symmetrically flow into Fen Shui forebays, improve into pond flow-shape.
Brief description of the drawings
Fig. 1 is the overall structure diagram of automatic balance type bifurcation pivot of the present invention；
Fig. 2 is water level self-balancing device schematic diagram of the present invention.
Embodiment
Automatic balance type bifurcation pivot as shown in Figure 1, including non-pressure tunnel 1, diffuser 2, Fen Shui forebays section 3, described point
Water forebay section includes U-shaped diversion dam 31.Arrow in accompanying drawing schematically shows the direction of current.
After reservoir water intaking, the tunnel body delivery of non-pressure tunnel 1 to the automatic balance type of process divides for one end of non-pressure tunnel 1
The tunnel outlet of water hinge diffuser 2, wherein diffuser 2 one termination non-pressure tunnel, a termination Fen Shui forebays section 3.Diffuser 2 by
Tunnel outlet gradually fades to Fen Shui forebays section 3 broadeningly.
Fen Shui forebays section 3 includes diversion dam 31, side weir 4, bleeder 8, forebay 32, Fen Shui forebays 9.Diversion dam 31
Position is located at the outermost water outlet side of diffuser 2, due to needing to divide water respectively to bleeder 8, forebay 32 and Fen Shui forebays 9,
Therefore diversion dam 31 is designed as U-shaped diversion dam, and the U-shaped diversion dam is generally u-shaped, is included in diffuser 2 and exports outermost setting
Circular arc base and the left side straight flange horizontally outward extended along water (flow) direction being respectively connected with the circular arc base both sides and right side
Straight flange, the outer convex direction on the circular arc base is towards diffuser 2.
The U-shaped circular arc base of diversion dam 31 arranges that the interval region between left side straight flange and left bank 6 is formed towards diffuser 2
Bleeder 8, the outflow side of bleeder 8 set the first pipeline 35, and the current flowed out by bleeder 8 flow into first pipeline 35, to the
One target area (such as the first tributary) water delivery；The part current that diffuser 2 flows out flow to Fen Shui forebays 9 along straight flange on the right side of U-shaped weir,
The outflow side of Fen Shui forebays 9 sets the 5th pipeline 39, and the current flowed out by Fen Shui forebays 9 flow into the 5th pipeline 39, to the 3rd mesh
Mark region (such as the 3rd tributary) water delivery；Region between U-shaped diversion dam circular arc base and left side straight flange and right side straight flange form into
Water forebay 32, the current that forebay 32 flows out flow into multiple pipelines, to the second target area (such as the second tributary) water delivery.By
This, is divided into three parts from the current of diffuser outflow by U-shaped weir：Bleeder 8, forebay 32, Fen Shui forebays 9.
Side weir 4 is used for overflow, including two parts, and a part is tilting section, forms the right side hypotenuse of diffuser 2, its one end
It is connected with the outlet of tunnel 1 right side, i.e., exports along water (flow) direction from tunnel and be obliquely installed to the right, another part is parallel-segment, with U
Straight flange is parallel on the right side of type weir and setting spaced apart, tilting section one end are connected with the outlet of non-pressure tunnel 1 right side, the other end and
Parallel-segment connects, the region formation Fen Shui forebays 9 on the right side of the parallel-segment of side weir 4 and U-shaped weir between straight flange, the entirety of side weir 4 (including incline
Oblique section and parallel-segment) region right bank 7 between sets drain tank 5, and drain tank 5 is connected with the secretly culvert that sluices.
Left bank 6 includes two parts, and a part is tilting section, and one end is connected with the outlet of tunnel 1 left side, i.e., exports edge from tunnel
Water (flow) direction is obliquely installed to the left, forms the left side hypotenuse of diffuser 2, and one section is horizontal segment, is connected with the tilting section other end,
And setting parallel with the U-shaped left side straight flange of weir 31 and spaced apart, between the horizontal segment of left bank 6 and the left side straight flange of U-shaped weir 31
Region forms bleeder 8.Region between the tilting section of left bank 6 and the tilting section of side weir 4 forms diffuser 2.
Right bank 7 includes two parts, and a part is tilting section, since tunnel export start and the pre- spacing in tilting section interval of side weir 4
It is obliquely installed to the right along water (flow) direction from rear, it is substantially parallel with the tilting section of side weir 4, and the another part of right bank 7 is horizontal segment, with
Right bank horizontal segment connects, and is set with the parallel-segment parallel interval preset distance of side weir 4.
The downstream of forebay 32 first row that be arranged in parallel disappears whirlpool pier 33 and second row disappears whirlpool pier 34, sets three and four respectively
It is individual.First row disappears between whirlpool pier 33 spaced a predetermined distance, and the upstream for the whirlpool pier 34 that disappears positioned at second row, and second row disappears whirlpool pier 34
Between spaced a predetermined distance.Three first rows whirlpool pier 33 that disappears is vertical cylinder, and spacing is equal, and the whirlpool pier 33 that disappears is in face of water
The face of stream is the face of cylinder, is plane back to the face of current, namely cross sectional shape is semicircle, and is located at two at left and right sides of current
The left and right straight flange on individual disappear whirlpool pier 33 and U-shaped weir 31 is respectively separated preset distance setting.Four second rows whirlpool pier 34 that disappears also is upright
Shape cylinder, spacing is equal, and two middle second rows disappear whirlpool pier 34 in face of the face of current be plane, back to the face of current to justify
Cylinder, namely cross sectional shape is semicircle, and the whirlpool pier 34 that disappears of two second rows at left and right sides of the current is close to U-shaped weir respectively
31 left and right sides straight flange is set, namely is separately fixed on U-shaped weir left and right sides straight flange and is set, therefore is flowed through first row and disappeared whirlpool pier
33 and the disappear current of whirlpool pier 34 of second row formed and four enter three forms gone out, namely first row disappears between whirlpool pier 33, the straight flange of U-shaped weir two
Form four water inlets, and second row disappears three delivery ports are formed between whirlpool pier 34, three delivery port water outlet sides set the respectively
Two pipelines 36, the 3rd pipeline 37, the 4th pipeline 38, for being supplied water to the second target area (such as the second tributary).Three first rows
The set location of whirlpool pier 33 of disappearing is respectively toward to three delivery ports that four second rows disappear between whirlpool pier 34, and each first row disappears
Whirlpool pier 33 and the second row of its both sides, which disappear, is all connected with filter screen 10, preferably rotary sieve between whirlpool pier 34, is used for
Impurity in drainage stream, such as branch, dead fish, to purify water.Disappeared the setting of whirlpool pier by as above two rows, can eliminate a point water
The water vortex of the especially forebay 32 of forebay section 3.
First the-the five pipeline of pipeline (35-39) is respectively provided with gate 40 in flow inlet side, is sealed for whole closings, part
Close, fully open each pipeline, to control the water for entering each pipeline.
The weir body of diversion dam 31, the weir body of side weir 4, the whirlpool pier 33 that disappears, 34 pier bodies are concrete casting shaping；Left bank 6, right bank 7
Concrete revetment is set.
As shown in Fig. 2 automatic balance type automatic balance type bifurcation pivot of the present invention also includes water level self-balancing device, should
Device is included in the energy dissipating power station (not shown in figure 1) of the 3rd tributary downstream setting, and the hydraulic turbine, control are provided with the energy dissipating power station
Device processed；Level sensor, the water level of detection Fen Shui forebays section 3 are provided with Fen Shui forebays section 3, and water level signal is reached in real time
The controller in energy dissipating power station, controller control guide vanes of water turbine aperture, with balance automatic balance type bifurcation pivot divide water before
The water level in pond.For example, after second pipe 36, the 3rd pipeline 37, the 4th pipeline 38 are closed by gate 40, Fen Shui forebays section 3
Water level rises, and unnecessary water flows to downstream by drain tank by side weir 4, the setting of the side weir 4, also plays autobalance
The effect of the water level of Fen Shui forebays section 3.Level sensor sends the water level signal of Fen Shui forebays section 3 to controller, and controller is sentenced
The disconnected water level of Fen Shui forebays section 3 height, if above the first predetermined threshold (water level high threshold), then controls water wheels according to height of water level
Machine stator increases aperture, and the current in the 3rd tributary are flowed through with increase, reduces the water level of Fen Shui forebays, when point that controller receives
The water level of water forebay section 3 is less than the second predetermined threshold (water level Low threshold), then is reduced according to height of water level, control guide vanes of water turbine
Aperture, to increase the water level of Fen Shui forebays, until the water level of water level Fen Shui forebays section 3 is in the first predetermined threshold and the second predetermined threshold
Between value, then controller maintains guide vanes of water turbine aperture constant, to keep the water level in Fen Shui forebays section 3.
The automatic balance type bifurcation pivot of the present invention, current can steadily enter pipeline, and forebay can eliminate vortex,
And good purification；Under the conditions of different operating conditions, automatic balance type bifurcation pivot of the invention, interior water surface curve is put down for it
Surely, wave height value mean square deviation is small, and overall flow velocity is smaller, and flow-shape is good；Diffuser produces without obvious disorderly fluidised form；U-shaped point
Mill weir causes current almost symmetrically to flow into Fen Shui forebays, improves into pond flow-shape；The water of forebay can be detected in real time
Position, and the water level of Fen Shui forebays section is adjusted in real time, realize the autobalance of water level.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention
Think and scope is defined.On the premise of design concept of the present invention is not departed from, technology of the ordinary people in the field to the present invention
The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, the claimed technology contents of the present invention,
All record in detail in the claims.
Claims (6)
1. a kind of bifurcation pivot, including non-pressure tunnel, diffuser and Fen Shui forebays section, it is characterised in that：
One end of the non-pressure tunnel is delivered to diffuser after reservoir water intaking, and diffuser one end connects the tunnel of non-pressure tunnel
Outlet, one end connection Fen Shui forebays section；Fen Shui forebays section includes diversion dam, for dividing water；Fen Shui forebays section also includes side
Weir, bleeder, forebay and Fen Shui forebays；Diversion dam is U-shaped diversion dam, including circular arc base and both side ends are distinguished therewith
Connected left side straight flange and right side straight flange, the outer convex direction on the circular arc base is towards diffuser；
The downstream of the forebay first row that be arranged in parallel disappears whirlpool pier and second row disappears whirlpool pier, sets three and four respectively；It is described
The first row whirlpool pier that disappears is located at second row and disappeared the upstream of whirlpool pier；
Three first rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and this disappear whirlpool pier in face of the face of current be the face of cylinder, the back of the body
Face to current is plane, first row disappear two whirlpool Dun YuUXing weirs that disappear at left and right sides of the pier of whirlpool left and right straight flange be respectively separated it is pre-
Set a distance is set；
Four second rows whirlpool pier that disappears is vertical cylinder, and spacing is equal, and middle two second rows disappear whirlpool pier in face of current
Face is plane, back to the face face of cylinder of current, two second rows of the left and right sides disappear whirlpool pier be close to respectively U-shaped weir left and right sides it is straight
Side is set.
2. bifurcation pivot according to claim 1, it is characterised in that：
The disappear set location of whirlpool pier of three first rows is respectively toward to three delivery ports that four second rows disappear between the pier of whirlpool.
3. bifurcation pivot according to claim 1, it is characterised in that：：Each first row disappears the of whirlpool pier and its both sides
Two rows, which disappear, is all connected with filter screen between the pier of whirlpool.
4. bifurcation pivot according to claim 1, it is characterised in that：The filter screen is rotary sieve.
5. bifurcation pivot according to claim 1, it is characterised in that：The bifurcation pivot also includes water level autobalance and filled
Put, the device is included in the level sensor set in the section of Fen Shui forebays, the energy dissipating power station set in Fen Shui forebays section downstream, should
The hydraulic turbine, controller are provided with energy dissipating power station；Wherein
Level sensor is used for the water level for detecting Fen Shui forebays section, and the water level signal is reached to the control in energy dissipating power station in real time
Device, controller are used for the aperture of the water level signal control guide vanes of water turbine according to the Fen Shui forebays section received.
6. bifurcation pivot according to claim 1, it is characterised in that：Controller judges the water level of Fen Shui forebays section higher than the
One predetermined threshold, then guide vanes of water turbine is controlled to increase aperture according to the height of water level；When controller judges the water of Fen Shui forebays section
Position is less than the second predetermined threshold, then reduces aperture according to the height of water level, control guide vanes of water turbine；Before controller judges to divide water
Pond section water level is between the first predetermined threshold and the second predetermined threshold, then controller maintains guide vanes of water turbine aperture constant.
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| CN201711042934.1A CN107724342B (en) | 2016-04-18 | 2016-04-18 | A kind of bifurcation pivot |
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| CN201610240239.5A CN105735207B (en) | 2016-04-18 | 2016-04-18 | Automatic balance type bifurcation pivot |
| CN201711042934.1A CN107724342B (en) | 2016-04-18 | 2016-04-18 | A kind of bifurcation pivot |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107724342B (en) | 2019-08-13 |
| CN105735207B (en) | 2017-11-28 |
| CN105735207A (en) | 2016-07-06 |
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