CN110878859A - Combined automatic ecological flow valve and control method thereof - Google Patents
Combined automatic ecological flow valve and control method thereof Download PDFInfo
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- CN110878859A CN110878859A CN201911106900.3A CN201911106900A CN110878859A CN 110878859 A CN110878859 A CN 110878859A CN 201911106900 A CN201911106900 A CN 201911106900A CN 110878859 A CN110878859 A CN 110878859A
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- 230000008859 change Effects 0.000 claims description 21
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- 239000010720 hydraulic oil Substances 0.000 claims description 7
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/029—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with two or more gates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
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- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a combined automatic ecological flow valve and a control method thereof, and the combined automatic ecological flow valve comprises a circular-torque-variable gradual-section gate valve shell, a set of valve opening control device controlled by a spring, an energy dissipation protective cover, a set of differential pressure type flow meter, a set of manual hydraulic control device and a set of valve opening scale. The invention can realize automatic adjustment, when the upstream water level rises, the spring in the valve is compressed by larger water pressure, the opening of the outflow orifice is reduced, the downstream flow is kept constant, when the upstream water level falls, the spring in the valve extends, the opening of the outflow orifice is increased, and the downward flow is kept constant. The whole valve body control mechanism is mechanically controlled, does not need electric power or manual intervention, and is trouble-saving and accurate.
Description
Technical Field
The invention belongs to the technical field of hydraulic and hydroelectric engineering and ecological environment, and particularly relates to flow control for lowering ecological water flow.
Background
Most reservoirs or hydropower stations need to release ecological flow so as to meet the ecological requirements of downstream river reach. The general engineering construction can determine an ecological flow according to the water resource conditions of upstream and downstream, and the ecological flow can be released by a reservoir or a hydropower station at any time in the operation process, so that the downstream river channel can be ensured not to be cut off. The established ecological flow lower setting body is an ecological water drain pipe, and a few hydropower stations or reservoirs with larger ecological flow are provided with ecological flow generator sets for draining water. The diameter of the ecological water drain pipe is mostly 150-800 mm, and for a pipeline gate valve, the diameter of the ecological water drain pipe belongs to a large caliber or a large caliber, a butterfly valve or a conical valve is generally arranged to control water flow, most of the ecological water drain pipe can only be closed or opened fully, the released flow is too large or too small, great difficulty is caused to the management and monitoring of the ecological flow, and the ecological flow is not released in most of time.
In the prior art, the invention patent with application number 201610494320.6 applied by the institute of survey and design of south-central surveying of China Electricity-building group Limited discloses a reservoir pre-dumping and ecological flow dumping structure, which comprises a diversion tunnel, a communicating pipe and a vertically arranged vertical shaft, wherein the reservoir is communicated with the diversion tunnel by the vertical shaft, the communicating pipe is attached to the inner wall of the vertical shaft and extends to an outlet of the diversion tunnel, the elevation of the inlet of the communicating pipe is lower than the normal water storage level of the reservoir and higher than the dead water level of the reservoir, a stilling pool is arranged at the outlet of the communicating pipe, a plugging body is arranged outside the communicating pipe in the diversion tunnel, a first valve for controlling the on-off of the communicating pipe is arranged at the tail end of the plugging body, and a. The scheme can timely and orderly arrange the flood to be discharged or the ecological flow in the reservoir to the downstream.
The invention patent with application number 201910198592.5 applied by the Guiyang survey design research institute of China Electricity-building group Limited discloses a method and a device for temporarily lowering ecological flow in the water storage period of a concrete dam, wherein the method controls the ecological flow discharged downwards by changing the arrangement position of a steel pipe of the dam body and arranging an eccentric half-ball valve at the bottom of a gallery of the dam body; arranging a Y-shaped double-cavity hydraulic control valve at the inlet of a steel pipe of the dam body, controlling the opening and closing of the valve and the opening degree of the valve through the medium pressure of the valve, and closing the inlet valve according to the preset pressure value of the Y-shaped double-cavity hydraulic control valve after the water storage height meets the condition; and a steel pipe between the eccentric half ball valve and the Y-shaped double-cavity hydraulic control valve is plugged through an exhaust pipe and a grouting pipe arranged at the inlet. The scheme can solve the problems of temporary lowering of ecological flow and later plugging during the water storage period of the lower gate of the concrete dam.
However, most of the flow control valves in the current market are small-caliber gate valves with diameters of tens of millimeters, which are not suitable for lowering the ecological flow of reservoirs or power stations, and the butterfly valves and the cone valves which are commonly used at present control the flow too coarsely, so that the purpose of controlling the flow cannot be achieved.
Disclosure of Invention
The invention aims to provide the automatic control gate valve and the control method thereof for ecological flow downward delivery, which have the advantages of convenient transportation and installation, reliable operation, good hydraulic condition, automatic balance by utilizing water pressure, no need of external energy, full-automatic flow adjustment, manual correction and intervention, high flow control accuracy and long service life, and can be widely applied to reservoir dams and hydropower stations.
Detailed technical description:
the utility model provides a modular automatic ecological flow valve, includes the gradual change section gate valve shell of a circle moment of change, one set by spring control's valve opening controlling means, an energy dissipation safety cover, one set of differential pressure type flowmeter, one set of manual hydraulic control device, one set of valve opening scale.
The shell of the gradual change section gate valve comprises a circular ring flange which is used for being connected with an upstream ecological drain pipe, and a plurality of bolt holes and a water stop rubber mat are arranged on the flange; the top surface, the left side surface and the right side surface of the shell of the downstream rectangular part of the gradual change section are respectively provided with a rectangular outflow orifice, and the water flow of the ecological water drain pipe flows to a downstream river channel from the three orifices; the shell of the gate valve of the gradual change section is fixed on the energy dissipation protective cover through a fixing bolt, so that the lateral deformation of the gradual change section is prevented from influencing the water stopping effect.
Furthermore, the valve opening control device comprises three orifice valve plates which are respectively fixed on the top surface, the left surface and the right surface of the bottom valve plate; the bottom valve plate is connected with a group of springs, the springs are fixed on the base, the base is fixed on the shell of the transition gate valve through base bolts, and the bottom valve plate moves upstream or downstream under the action of water pressure to drive the top, left and right orifice valve plates fixed on the bottom valve plate to move, so that the opening degree of the orifices is increased or decreased.
Furthermore, the aforementioned manual hydraulic means includes a hydraulic oil cylinder, a threaded hydraulic adjusting rod and a hydraulic adjusting handle, a hollow pipeline is arranged in the threaded hydraulic adjusting rod, and a threaded hydraulic switch is arranged at an outlet of the hollow pipeline.
Furthermore, the manual hydraulic device also comprises a connecting oil pipe, an oil pipe joint, a fixed oil pipe and a telescopic oil pipe; the hydraulic oil cylinder is fixed on the energy dissipation protective cover, the fixed oil pipe is fixed on the base, and the telescopic oil pipe is fixed on the bottom valve plate.
Further, aforementioned valve opening scale includes scale and scale support, and the scale forms a fixed bearing structure with the scale support jointly, and a foot of scale support is fixed on the drill way valve plate of top surface, and another sole end is equipped with a gyro wheel, adheres to on the gradual change section gate valve shell top surface, and the scale support follows the drill way valve plate and makes reciprocal linear motion, knows the aperture of the drill way of effluenting through the scale reading.
The control method of the combined automatic ecological flow valve comprises the following steps: when the upstream water level rises, the spring in the valve is compressed by larger water pressure, the opening degree of the outflow orifice is reduced, the downstream flow is kept constant, and when the upstream water level decreases, the spring in the valve extends, the opening degree of the outflow orifice is increased, and the downward flow is kept constant; when the hydraulic adjusting handle is manually rotated left and right, the threaded hydraulic adjusting rod rises or falls to cause pressure change of the hydraulic oil cylinder, oil pressure is transmitted to the fixed oil pipe and then to the telescopic oil pipe through the connecting oil pipe to act on the bottom valve plate, the bottom valve plate moves upstream or downstream due to the change of the oil pressure to adjust the opening of the outlet orifice, and manual flow adjustment is achieved.
Compared with the prior art, the invention has the following advantages:
1. at present, a butterfly valve, a cone valve and the like are generally adopted for lowering ecological flow of a reservoir or a hydropower station, the valves are manually or electrically operated, the flow is controlled roughly, and the flow is generally judged according to the perception of an operator. When the opening degree is fixed, the upstream water level rises, the downward flow is increased, and the automatic adjusting function is not available. The invention can realize automatic adjustment, when the upstream water level rises, the spring in the valve is compressed by larger water pressure, the opening of the outflow orifice is reduced, the downstream flow is kept constant, when the upstream water level falls, the spring in the valve extends, the opening of the outflow orifice is increased, and the downward flow is kept constant. The whole valve body control mechanism is mechanically controlled, does not need electric power or manual intervention, and is trouble-saving and accurate.
2. The existing flow constant valve and other devices are limited by a stress structure, and the manufactured products are small in diameter and basically below 50 mm. The invention is designed aiming at the ecological flow discharged by a reservoir or a power station, and can widely meet the use conditions of large caliber, large flow, low and medium water heads.
3. Compared with the existing valve, the invention is provided with the flowmeter and the opening scale, can read the lowering flow data on site and can also check the lowering flow data on site;
4. compared with the existing discharge facility, after the flow is accurately controlled, water resources are not wasted for a reservoir or a hydropower station, ecological flow is easily and actively released, the improvement of the consciousness is facilitated, the environmental protection is facilitated, and the supervision pressure is reduced.
5. Compared with the existing electronic automatic control flow valve, the invention adopts a full mechanical structure, is not afraid of external force and wind and rain, has wide application environment, is durable, saves energy and does not need electric power.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line a-a of FIG. 1;
FIG. 3 is a cross-sectional view taken along line c-c of FIG. 1;
FIG. 4 is a cross-sectional view taken along line b-b of FIG. 1;
fig. 5 is a layout diagram of embodiment 1.
The labels in the figures are: 1-circular ring flange, 2-flange bolt holes, 3-water stop rubber mat, 4-gradual change section gate valve shell, 5-fixing bolt, 6-energy dissipation protective cover, 7-orifice valve plate, 8-outflow orifice, 9-bottom valve plate, 10-spring, 11-bolt gasket, 12-base bolt, 13-base, 14-flat pressure hole, 15-hydraulic pipe bolt, 16-fixing oil pipe, 17-telescopic oil pipe, 18-connecting oil pipe, 19-fixing support structure, 20-oil pipe joint, 21-differential pressure type flowmeter, 22-hydraulic oil cylinder, 23-thread type hydraulic adjusting rod, 24-hydraulic adjusting handle, 25-hollow pipeline, 26-thread type hydraulic switch, 27-barrage dam, 28-ecological water drain pipe, 29-maintenance valve and 30-combined automatic ecological flow valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-4, the combined automatic flow control gate valve for ecological water flow descending in reservoirs and hydropower stations of the invention comprises a gradual-change gate valve shell 4 with a circular torque change, a set of valve opening control device controlled by a spring 10, an energy dissipation protective cover 6, a set of differential pressure type flow meter 21, a set of manual hydraulic control device and a set of valve opening scale. The method is mainly used for controlling the flow rate of reservoir or hydropower station ecological flow.
The gate valve shell 4 with the gradual change section of the circular torque moment plays a role of limiting water flow, the circular end on the upstream side is used for being connected with an upstream ecological water discharge pipe, the gradual change section on the middle part is used for reducing head loss, the rectangular shape on the downstream side is used for conveniently arranging an outflow hole 8, and the size of the plane rectangular hole is easier to determine according to the size of the holeThe flow rate of the port. The top surface, the left side surface and the right side surface are provided with water outlet holes, the area of a water outlet hole opening can be increased to the maximum extent, so that the stroke of the spring 10 is reduced, the bottom surface is used as a basic acting surface for installation, and the water outlet hole is not arranged, so that the three water outlet hole openings of the top surface, the left side surface and the right side surface are arranged. Formula for calculating flow through orifice
Where Q-flow through the orifice, m3S; mu is the flow coefficient of the gate valve, and is determined by tests after the gate valve is produced, and the mu is generally about 0.95; b, the width of the outflow orifice is the same as the width of the orifices on the top surface and the side surface, and is 0.75 time and m of the diameter of the ecological water discharge pipe; e is the opening of the orifice, m, e is determined by the position of the orifice valve plate 7, when the upstream is the reservoir dead water level and the downstream is the normal water level of the river, the upstream and downstream water heads are minimum at the moment, the verified ecological flow is required to be released, the orifice e is maximum, and the device is 0.35 time of the diameter of the ecological water discharge pipe 28. When the upstream reservoir water level rises to a normal water storage level, the difference between the upstream water head and the downstream water head of the gate valve is increased, the orifice valve plate 7 blocks part of orifices along with the downstream movement of the bottom valve plate 9, so that e is reduced, and the flow passing through the orifices is kept unchanged; g-acceleration of gravity, g being 9.81m/s2Z is the water head difference between the upstream surface and the downstream surface of the bottom valve plate 9, and the value of m is the difference between the water level of the upstream reservoir and the water level of the riverbed at the position of the gate valve, and then the water head loss of the ecological water drain pipe 28 is subtracted.
The bottom valve plate 9 is installed in the transition section gate valve shell 4, the bottom valve plate 9 plays the role of water stop and a piston, the periphery of the bottom valve plate is in close contact with the transition section gate valve shell 4, and the bottom valve plate can slide linearly upstream or downstream along the inner wall of the transition section gate valve shell 4 without water leakage. The left side of the bottom valve plate 9 is under the water pressure of an upstream reservoir, the right side of the bottom valve plate 9 is under the water pressure of a downstream riverway, and a group of springs 10 are fixed on the downstream side of the bottom valve plate 9. When the bottom valve plate 9 is acted by a large upstream water pressure, the upstream side and the downstream side are unbalanced in stress, the stress of the spring 10 is increased, the spring 10 is compressed, the bottom valve plate 9 moves to the downstream side along with the spring 10, and the orifice valve plate 7 fixed on the bottom valve plate 9 is driven to move to the downstream side, so that a blocking part is blockedThe orifice, making e smaller, restricts the flow not to increase. The deformation formula of the spring 10 is Δ e-gZS/k, where Δ e is the expansion and contraction deformation amount of the spring 10, m; g-9.81N/kg, Z-head difference between the upstream surface and the downstream surface of the bottom valve plate 9, m; s-area of upstream surface of base valve plate 9, m2(ii) a k is the stiffness coefficient of the spring 10, is related to the material of the spring 10, the diameter of a steel wire, the number of turns and the like, and is designed according to the area of the bottom valve plate 9.
The base 13 is provided with a water inlet hole, so that water can freely enter and exit, and the water pressure at the downstream side of the bottom valve plate 9 is consistent with the water pressure of a riverbed.
The energy dissipation protective cover 6 is made of steel and covers the gradual change section gate valve shell 4. Gradual change section gate valve shell 4 is a precision structure, will guarantee in the transportation, and the installation in-process warp, therefore has set up one set of energy dissipation safety cover 6 externally, and energy dissipation safety cover 6 blocks the discharge flow water tongue in water outlet port simultaneously, plays the energy dissipation effect. The bottom plate of the energy dissipation protective cover 6 is a plane, and the bolt holes are arranged to facilitate connection with the energy dissipation protective cover 6, and meanwhile, installation and stability of the gate valve are facilitated. The side surface and the top surface of the energy dissipation protective cover 6 are both of arc structures, so that the water tongue of the outflow orifice 8 can dissipate energy conveniently.
A scale bracket is fixed on the top surface orifice valve plate 7, the scale can move upstream or downstream through a small hole reserved on the energy dissipation protective cover 6, and the scale extends out of the energy dissipation protective cover 6, so that the scale bracket is convenient to read, and the opening degree of the outflow orifice 8 can be observed in the operation process.
A set of differential pressure type flowmeter 21 is arranged on the top surface of the gate valve, and the ecological flow rate of the lower part can be read at any time in the operation process.
This device has still additionally added one set of manual hydraulic control device, and when the gate valve was outside the operation flood peak scope, through hydraulic pressure pipeline and the flexible pipe of hydraulic pressure promotion valve bottom plate removal to adjust the orifice aperture that flows, flow is transferred in the manual regulation.
Example 1:
as shown in fig. 5, the river channel is blocked by the barrage 27, an ecological water discharge pipe 28 is arranged in the barrage, water is discharged to a downstream river channel, a set of maintenance valve 29 is required to be arranged on the ecological water discharge pipe 28, the maintenance valve 29 is generally a common butterfly valve, a set of combined automatic ecological flow valve 30 is arranged at the outlet of the ecological water discharge pipe 28, and the opening degree of the orifice of the gate valve is automatically adjusted, so that constant ecological flow is ensured to be continuously discharged, and ecological requirements of the downstream river channel are met.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a modular automatic ecological flow valve which characterized in that: the variable-section gate valve comprises a variable-pitch gate valve shell (4), a set of valve opening control device controlled by a spring (10), an energy dissipation protective cover (6), a set of differential pressure type flowmeter (21), a set of manual hydraulic control device and a set of valve opening scale.
2. The modular automated ecological flow valve of claim 1, in which: the gradual change section gate valve shell (4) comprises a circular ring-shaped flange plate (1) which is used for being connected with an upstream ecological drain pipe, and a plurality of bolt holes (2) and a water stop rubber mat (3) are arranged on the flange plate (1); the top surface, the left side surface and the right side surface of the shell of the downstream rectangular part of the gradual change section are respectively provided with a rectangular outflow orifice (8), and the water flow of the ecological water discharge pipe (28) flows to a downstream river channel from the three orifices; gradual change section gate valve shell (4) are fixed on energy dissipation safety cover (6) through fixing bolt (5), prevent that gradual change section side deformation from influencing the stagnant water effect.
3. The modular automated ecological flow valve of claim 1, in which: the valve opening control device comprises three orifice valve plates (7) which are respectively fixed on the top surface, the left surface and the right surface of the bottom valve plate (9); a group of springs (10) are connected to the bottom valve plate (9), the springs (10) are fixed to a base (13), the base (13) is fixed to the transition gate valve shell (4) through base bolts (12), and the bottom valve plate (9) moves upstream or downstream under the action of hydraulic pressure to drive the top, left and right orifice valve plates (7) fixed to the bottom valve plate to move, so that the opening degree of the orifices is increased or decreased.
4. The modular automated ecological flow valve of claim 1, in which: the manual hydraulic device comprises a hydraulic oil cylinder (22), a threaded hydraulic adjusting rod (23) and a hydraulic adjusting handle (24), a hollow pipeline (25) is arranged in the threaded hydraulic adjusting rod (23), and a threaded hydraulic switch (26) is arranged at the outlet of the hollow pipeline (25).
5. The modular automated ecological flow valve of claim 4, in which: the manual hydraulic device also comprises a connecting oil pipe (18), an oil pipe joint (20), a fixed oil pipe (16) and a telescopic oil pipe (17); the hydraulic oil cylinder (22) is fixed on the energy dissipation protective cover (6), the fixed oil pipe (16) is fixed on the base (13), and the telescopic oil pipe (17) is fixed on the bottom valve plate (9).
6. The modular automated ecological flow valve of claim 3, in which: the valve opening scale comprises a scale and a scale support, the scale and the scale support jointly form a fixed supporting structure (19), one foot of the scale support is fixed on an orifice valve plate (7) of the top surface, the other foot bottom end of the scale support is provided with a roller and is attached to the top surface of a transition gate valve shell (4), the scale support follows the orifice valve plate (9) to make reciprocating linear motion, and the opening of an outflow orifice (8) is known through scale reading.
7. A control method of the combined automatic ecological flow valve according to any one of claims 1 to 6, characterized in that: when the upstream water level rises, the spring (10) in the valve is compressed by larger water pressure, the opening degree of the outflow orifice (8) is reduced accordingly, the downstream flow is kept constant, and when the upstream water level falls, the spring (10) in the valve extends, the opening degree of the outflow orifice (8) is increased accordingly, and the downward flow is kept constant; when the hydraulic adjusting handle (24) is manually rotated left and right, the thread type hydraulic adjusting rod (23) rises or falls to cause pressure change of the hydraulic oil cylinder (22), oil pressure is transmitted to the fixed oil pipe (16) through the connecting oil pipe (18) and then transmitted to the telescopic oil pipe (17), pressure is acted on the bottom valve plate (9), the bottom valve plate (9) moves upstream or downstream due to the oil pressure change to adjust the opening degree of the outflow hole (8), and manual flow adjustment is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911106900.3A CN110878859B (en) | 2019-11-13 | 2019-11-13 | Combined automatic ecological flow valve and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911106900.3A CN110878859B (en) | 2019-11-13 | 2019-11-13 | Combined automatic ecological flow valve and control method thereof |
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| CN110878859A true CN110878859A (en) | 2020-03-13 |
| CN110878859B CN110878859B (en) | 2024-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923514A (en) * | 2022-04-21 | 2022-08-19 | 广西壮族自治区水利科学研究院 | Real-time monitoring equipment for ecological flow discharged from water conservancy and hydropower engineering |
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| CN114923514A (en) * | 2022-04-21 | 2022-08-19 | 广西壮族自治区水利科学研究院 | Real-time monitoring equipment for ecological flow discharged from water conservancy and hydropower engineering |
| CN114923514B (en) * | 2022-04-21 | 2024-01-26 | 广西壮族自治区水利科学研究院 | Water conservancy and hydropower engineering let-down ecological flow real-time monitoring equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110878859B (en) | 2024-07-19 |
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