CN114875840B - Sediment discharge device for reservoir sediment - Google Patents
Sediment discharge device for reservoir sediment Download PDFInfo
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- CN114875840B CN114875840B CN202210623851.6A CN202210623851A CN114875840B CN 114875840 B CN114875840 B CN 114875840B CN 202210623851 A CN202210623851 A CN 202210623851A CN 114875840 B CN114875840 B CN 114875840B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention provides a sediment discharge device for reservoir sediment, and relates to the technical field of hydraulic and hydroelectric engineering. The sediment discharge device for reservoir sediment comprises: at least three truss units arranged in the reservoir; the water flow flowing out of the water outlet of any truss unit enters the water inlet of the next truss unit; the water inlet of any truss unit enters from the water flow flowing out from the water outlet of the last truss unit; the water flow circulating among the three truss units forms spiral flow so as to discharge silt in the water flow; so as to realize the purpose of comprehensively and efficiently discharging the sand.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a sediment discharge device for reservoir sediment.
Background
China is the country with the largest number of reservoirs in the world, and the storage capacity loss caused by sediment deposition influences various functions, safety guarantee and comprehensive benefits of the reservoirs. Reservoir siltation directly threatens the safety and service life of reservoirs and dams, as well as downstream areas. In reservoir areas, effective reservoir capacity is reduced by sedimentation, and the regulation performance of a reservoir and the normal operation of hydraulic facilities are influenced, so that the deep research on problems related to the reservoir sedimentation is an important subject in front of water conservancy workers. However, the inland rivers in northwest of China have large sand content, strong seasonality and fragile most ecological environments, so that silt is easy to deposit in the reservoir, and the problems are more urgent.
The inland river in northwest China originates from a high mountain, flows through the mountain front flood alluvial plain, belongs to a seasonal river, has high sediment content and large particle size in the flood season, and is often deposited in a reservoir area. The traditional sand discharge mode is that a dam flood discharge sand discharge hole is used for straight-flow sand discharge in a flood season, the sand discharge range is mostly limited near the sand discharge hole, the sand discharge range is limited, and sand discharge cannot be carried out on sediment in a reservoir region outside a hydraulic influence region of the sand discharge hole, so that the effective reservoir capacity of a reservoir is reduced, and the service life of the reservoir is influenced.
Disclosure of Invention
The invention aims to provide a sand discharge device for reservoir sediment to realize the purpose of comprehensive and efficient sand discharge.
In order to achieve the purpose, the invention provides the following scheme:
a sand discharge apparatus for reservoir deposited sand, the sand discharge apparatus comprising: at least three truss units arranged in the reservoir;
the water flow flowing out of the water outlet of any one truss unit enters the water inlet of the next truss unit; the water inlet of any one truss unit enters from the water flow flowing out of the water outlet of the last truss unit; and the water flow circulating among the three truss units forms a spiral flow so as to discharge silt in the water flow.
Optionally, the sediment discharge apparatus for reservoir sediment deposition further comprises: a first flow guide part and a second flow guide part;
the first flow guide part is arranged on the inner wall of one side of the water inlet of the reservoir and is used for driving water entering from the water inlet of the reservoir to flow towards the water inlet direction of the target truss unit; the target truss unit is a truss unit which is arranged on the other side of the water inlet of the reservoir and is closest to the water inlet of the reservoir;
the second diversion part is arranged in the reservoir and used for guiding water flow entering from the water inlet of the reservoir to enter the water inlet of the target truss unit.
Optionally, the truss assembly specifically includes: the device comprises a truss, a hydraulic turbine set, an inlet guide vane and an outlet guide vane;
the truss is vertically arranged in the water reservoir; at least one hydraulic turbine set is sleeved on the truss; the inlet guide vane is arranged at the water inlet of the truss, and the outlet guide vane is arranged at the water outlet of the truss; the inlet guide vane is used for guiding the water flow flowing out from the water outlet of the last truss unit to enter the hydraulic turbine unit of the current truss unit; the outlet guide vane is used for guiding the water flow flowing out of the hydraulic turbine unit of the current truss unit to the water inlet of the next truss unit.
Optionally, the hydraulic turbine specifically includes: a seat ring, a water pump and a guide vane assembly;
the seat ring is sleeved on the truss; the water pump is arranged inside the seat ring, and the guide vane assembly is arranged on the seat ring and is rotationally connected with the seat ring; the water pump is connected with the guide vane assembly; the water pump is used for pumping water flow to the guide vane assembly so as to enable the guide vane assembly to rotate, and therefore the flow speed of the water flow is increased.
Optionally, the height of the water inlet of the truss assembly is lower than the height of the water inlet of the reservoir; the height of the water outlet of the truss unit is higher than that of the sand discharge hole of the reservoir.
Optionally, the first flow guide part is of an arc-shaped structure, and the opening direction of the arc-shaped structure is consistent with the water inlet direction of the target truss unit.
Optionally, the sediment outflow apparatus for reservoir sediment further includes: a sand discharging pool; the sand discharging pool is arranged at a sand discharging hole of the reservoir.
Optionally, the rotation speed and rotation angle of the guide vane assembly are determined according to the capacity of the reservoir and the size of the sand discharge hole of the reservoir.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the at least three truss units are arranged in the reservoir, so that the water flow flowing out of the water outlet of any one truss unit enters the water inlet of the next truss unit, the water flow flowing out of the water outlet of the last truss unit enters the water inlet of any one truss unit, spiral flow is formed in the reservoir, sediment in the water flow can be driven to move, the sediment is discharged from the reservoir, and the purpose of comprehensively and efficiently discharging the sediment is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a sediment discharge apparatus for reservoir sediment according to an embodiment of the present invention;
fig. 2 is a structural view of a truss assembly of the sediment discharge apparatus for reservoir sediment according to the embodiment of the present invention;
fig. 3 is a block diagram of a hydraulic turbine of a sediment discharge apparatus for reservoir sediment according to an embodiment of the present invention;
fig. 4 is a diagram illustrating an operation of the sand discharging apparatus for reservoir sediment deposition according to the embodiment of the present invention.
Description of the symbols:
the system comprises an upstream river channel-1, a water inlet-2 of a reservoir, a truss unit-3, a water outlet-4 of the reservoir, a downstream river channel-5, a first flow guide part-6, a second flow guide part-7, a sand discharge hole-8, a sand discharge pool-9, a truss-10, a water turbine unit-11, an inlet guide vane-12, an outlet guide vane-13, a seat ring-14, a water pump-15 and a guide vane assembly-16.
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.
The invention aims to provide a sand discharging device for reservoir sediment, which is characterized in that at least three truss units are arranged in a reservoir, so that water flow flowing out of a water outlet of any truss unit enters a water inlet of the next truss unit, and water flow flowing out of a water outlet of the last truss unit enters the water inlet of any truss unit, thereby forming spiral flow in the reservoir, driving the sediment in the water flow to move, discharging the sediment out of the reservoir and achieving the purpose of comprehensively and efficiently discharging the sediment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the sediment discharge apparatus for reservoir-deposited sediment of the present embodiment includes: at least three truss units 3 arranged in the reservoir; arranging a plurality of truss units 3 in a target storage area, taking 4 as an example, enabling water flow flowing out of a water outlet of any truss unit 3 to enter a water inlet of the next truss unit 3; the water inlet of any truss unit 3 enters from the water flow flowing out from the water outlet of the last truss unit 3; the water flow circulating among the three truss units 3 forms a spiral flow, so that silt in the water flow is discharged. The leading principle is through the water inlet 2 that utilizes the reservoir and the velocity of flow flood peak of arranging husky hole 8, lets it form certain velocity of flow, the controllable whirl of certain radius size in the reservoir district, decomposes the whirl velocity of flow into two directions of axial and tangential, controls the suspension and the migration of silt respectively to carry heavy load intensity height, particle diameter are big, originally the unable silt of carrying the migration of direct current. After entering from the water inlet 2 of reservoir, the water increases the velocity of flow through truss unit 3, increases its degree of disorder, rotates gradually from the reservoir district and forms the whirl, drives the silt flow direction sediment in the reservoir district to arrange husky hole 8 to reach the effect of arranging the sand.
In one embodiment, as shown in fig. 1, the sand discharging device further comprises: a first flow guide part 6 and a second flow guide part 7; the first flow guide part 6 is arranged on the inner wall of one side of the water inlet 2 of the reservoir, and the first flow guide part 6 is used for driving water entering from the water inlet 2 of the reservoir to flow towards the water inlet direction of the target truss set 3; the target truss unit is a truss unit 3 which is arranged on the other side of the water inlet of the reservoir and is closest to the water inlet of the reservoir; and the second diversion part 7 is arranged in the reservoir, and the second diversion part 7 is used for guiding the water flow entering from the water inlet 2 of the reservoir to enter the water inlet of the target truss unit. The first flow guide part 6 and the second flow guide part 7 can be side walls or flow guide walls, and can also be of artificially-added structures. Such as a diversion wall or a side wall, which can be used near the water inlet 2 or the sand discharge hole 8 of the reservoir, so as to form rotational flow or spiral flow better. The first diversion part 6 (such as a side wall) and the second diversion part 7 (such as a diversion wall) are arranged in the reservoir area so as to achieve a better sand discharge effect.
Specifically, the first flow guiding part 6 may have an arc-shaped structure, and an opening direction of the arc-shaped structure is consistent with a water inlet direction of the target truss set, so as to facilitate flow guiding. For example, several guide walls can be arranged near the water inlet 2 and the sand discharge hole 8 of the reservoir, part of the side walls or the guide walls are in an arc-shaped structure, and the side walls near the water inlet 2 and the sand discharge hole 8 of the reservoir are arc-shaped side walls or can be controlled manually.
In an embodiment, as shown in fig. 2, the truss assembly 3 specifically includes: the device comprises a truss 10, a hydraulic turbine set 11, an inlet guide vane 12 and an outlet guide vane 13; the truss 10 is vertically arranged in the water reservoir; at least one hydraulic turbine set 11 is sleeved on the truss 10; the inlet guide vane 12 is arranged at the water inlet of the truss 10, and the outlet guide vane 13 is arranged at the water outlet of the truss 10; the inlet guide vane 12 is used for guiding the water flow flowing out from the water outlet of the last truss unit 3 to enter the hydraulic turbine unit 11 of the current truss unit 3; the outlet guide vanes 13 serve to guide the water flow from the turbine unit 11 of the current truss unit 3 to the water inlet of the next truss unit 3.
Specifically, as shown in fig. 2 and 3, the hydraulic turbine group 11 specifically includes: a seat ring 14, a water pump 15 and a vane assembly 16; the seat ring 14 is sleeved on the truss 10; the water pump 15 is arranged inside the seat ring 14, and the guide vane assembly 16 is arranged on the seat ring 14 and is rotationally connected with the seat ring 14; the water pump 15 is connected with the guide vane assembly 16; the water pump 15 is used to pump a water flow to the guide vane assembly 16 to rotate the guide vane assembly 16, thereby increasing the flow rate of the water flow. In addition, the water inlet 2 or the sand discharge hole 8 of the reservoir can be additionally provided with a water pump 15 or a water turbine to obtain higher flow velocity so as to reach the expected flow state. The power of the hydraulic turbine set 11 additionally arranged on the truss 10 is different, and the spiral flow velocity and the radius of a basin can be gradually increased step by step.
Specifically, the rotation speed and the rotation angle of the guide vane assembly 16 are determined according to the capacity of the reservoir and the size of the sand discharge hole 9 of the reservoir.
In one embodiment, the height of the water inlet of the truss assembly 3 is lower than the height of the water inlet 2 of the reservoir; the height of the water outlet of the truss unit 3 is higher than that of the sand discharge hole 8 of the reservoir. For example, the method can be realized by arranging slopes at different areas at the bottom of the reservoir area.
In one embodiment, the sand discharging device further comprises a sand discharging pool 9; the sand discharging pool 9 is arranged at the sand discharging hole 8 of the reservoir. The water inlet 2 and the sediment outlet 8 of reservoir are far away from each other, and have gate control in the sediment outlet 8, the different regions in reservoir district bottom slightly have the slope to fall (or artificial increase), there is available water conservancy diversion wall or side wall near inside water inlet of reservoir district or sediment outlet 8 to in better formation whirl, the water inlet 2 of reservoir or the gate accessible of reservoir set up the velocity of flow that hydraulic turbine unit 11 increases rivers, in order to reach more ideal flow state, install hydraulic turbine unit 11 or water pump 15 additional on the truss 10 so that better do promotion and flow state control to rivers.
The flow velocity of the water flow spiral flow can be decomposed into axial and tangential flow velocities, namely the synthesis of axial straight flow and forced vortex. The principle of spiral flow conveying is that longitudinal flow velocity is used for conveying and the vortex flow is used for suspension, so that a heavy-load and slow-moving conveying mode is possible. The invention relates to a water flow guiding device, which belongs to hydraulic sand removal and desilting and is obtained by combining different flow speed functions. By arranging a plurality of trusses 10 in a target reservoir area, taking three as an example for a while, as shown in fig. 4, a water turbine unit 11 consisting of a seat ring 14, a water pump 15 and a guide vane assembly 16 on each truss 10 is utilized to form a swirling flow, namely a spiral flow, in a target water area, the direction of each water turbine unit 11 can be finely adjusted, the determined capacity of a target reservoir can be obtained through experiments, and meanwhile, the device needs to measure the effective sand discharge range and the effective sand discharge rate of a sand discharge hole 8 in the reservoir area, so that the operation rate and the operation angle of the unit are determined, the flow rate and the radius of the spiral flow are further controlled, and the formed swirling flow achieves the optimal sand discharge rate and the lowest energy consumption by utilizing the tangential speed of the water inlet direction and the water outlet direction. The device is easy to install and disassemble, and has better applicability to built and seriously silted reservoir areas. The working principle of the single truss 10 and the hydraulic turbine set 11 thereof is as follows: the water pump 15 is installed inside the hydraulic turbine 11 to meet the requirement of working load, and the water inlet and outlet of the truss 10 are provided with guide vanes, i.e. an inlet guide vane 12 and an outlet guide vane 13, so as to control the direction of the water inlet and outlet more accurately.
The sand discharge device of the embodiment has the following advantages:
the silt dredging device mainly utilizes natural hydrodynamic force of a water inlet 2 and a sand discharge hole 8 of a reservoir, and is provided with a certain diversion and flow guide facility, and the silt dredging purpose of a reservoir area is realized by a first flow guide part 6, a second flow guide part 7 (such as a diversion canal, a side wall or a diversion wall) and a water flow guide device (a water turbine set 11 and a water pump 15). When the reservoir is desilted, a gate of a sand discharge hole 8 of the reservoir is opened, the angle of the water flow guide device and the operation time of the device are automatically adjusted and set according to the sediment particle size and the sediment content of the sediment contained in the reservoir area, the sediment in the reservoir area is stirred by the formed spiral flow to flow into the range of a sand discharge funnel of the sand discharge hole 8 and is discharged to a sand discharge pool 9 through the sand discharge hole 8, and the water flows to a downstream river channel 5. The device is arranged aiming at the solid particle size and grading of the sediment of the reservoir so as to give full play to the effect of the sediment outlet 8 and reduce or eliminate the damage of sediment accumulation in the reservoir area to the reservoir. The sand discharge device can reduce manpower, discharge sand efficiently, and meanwhile, the water flow guide equipment is convenient to mount and dismount and relatively low in cost, so that guarantee is provided for long-term operation of a reservoir.
A more specific implementation process of the sand discharging device of the embodiment is as follows:
one side of the water inlet 2 of the reservoir is provided with a first flow guiding part 6 (such as a side wall) and a second flow guiding part 7 (such as a flow guiding wall) behind the first flow guiding part for roughly controlling the direction of the water body, then the water flow is guided carefully through the truss unit 3, and then the redundant water flow is guided to the water inlet 2 of the reservoir through the truss unit 3. The truss unit 3 is provided with a slope in the same direction as the incoming water, so that rotational flow is easier to form in the reservoir area. The hydraulic slope from high to low is formed from the truss unit 3 to the sand discharge hole 8, so that sediment is easy to accumulate near the sand discharge hole 8, and the sand discharge hole 8 is easy to discharge the sediment with the effect. The power of the hydraulic turbine set 11 on the truss 10 is different, the effect of controlling the rotational flow velocity and the rotational flow radius is achieved by controlling the power of the hydraulic turbine set on each truss 10, and meanwhile, the energy consumption of the hydraulic turbine set is lower.
The method comprises the steps of closing a gate of a water outlet 4 of a reservoir, suspending water drainage to a downstream river channel 5, enabling a water body to come from an upstream river channel 1, increasing the flow velocity through a water inlet 2 of the reservoir, being more beneficial to the water body to flow and drive sediment with larger particle size under high flow velocity, enabling the water body to contact with a second flow guide part 7 after passing through the water inlet 2 of the reservoir, enabling the water body to continue to flow after passing through a flow guide wall, further guiding the entering fluid, namely water flow, through a truss unit 3, enabling the water body, namely water flow, to form primary rotation, enabling the water body to accelerate by utilizing the truss unit 3 close to the side of the second flow guide part 7, enabling the water body to contact with a first flow guide part 6 (such as a side wall) to form a cycle, accelerating the effect of swirling flow stirring the sediment to generate, arranging a water pump 15 or a water turbine at a sand discharge hole 8, starting the water pump 15 (or the water turbine) in the sand discharge hole 8, increasing swirling flow hydrodynamic force around the sand discharge hole 8, enabling the sediment to be led to a sand discharge pool 9, conducting next treatment, and further achieving the effect of driving the cleaning of the whole reservoir area to achieve the aim of efficient sand discharge.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A sediment ejection apparatus for reservoir deposited sediment, the sediment ejection apparatus comprising: at least three truss units arranged in the reservoir;
the water flow flowing out of the water outlet of any one truss unit enters the water inlet of the next truss unit; the water inlet of any one truss unit enters from the water flow flowing out of the water outlet of the last truss unit; at least three water flows circulating among the truss units form spiral flows, and silt in a reservoir area is stirred and flows to the range of the sand discharge hole sand discharge funnel by utilizing the formed spiral flows so that the silt in the water flows is discharged.
2. The apparatus of claim 1, further comprising: a first flow guide part and a second flow guide part;
the first diversion part is arranged on the inner wall of one side of the water inlet of the reservoir and is used for driving water entering from the water inlet of the reservoir to flow towards the water inlet direction of the target truss unit; the target truss set is a truss set which is arranged on the other side of the water inlet of the reservoir and is closest to the water inlet of the reservoir;
the second diversion part is arranged in the reservoir and used for guiding water flow entering from the water inlet of the reservoir to enter the water inlet of the target truss unit.
3. The sediment outflow apparatus of a reservoir silted sediment according to claim 1, wherein the truss mechanism specifically includes: the device comprises a truss, a hydraulic turbine set, an inlet guide vane and an outlet guide vane;
the truss is vertically arranged in the water reservoir; at least one hydraulic turbine set is sleeved on the truss; the inlet guide vane is arranged at the water inlet of the truss, and the outlet guide vane is arranged at the water outlet of the truss; the inlet guide vane is used for guiding the water flow flowing out from the water outlet of the last truss unit to enter the hydraulic turbine unit of the current truss unit; the outlet guide vane is used for guiding the water flow flowing out of the hydraulic turbine unit of the current truss unit to the water inlet of the next truss unit.
4. The sediment outflow apparatus of a reservoir deposited sediment according to claim 3, wherein the hydraulic turbine set specifically comprises: a seat ring, water pump and vane assembly;
the seat ring is sleeved on the truss; the water pump is arranged inside the seat ring, and the guide vane assembly is arranged on the seat ring and is rotationally connected with the seat ring; the water pump is connected with the guide vane assembly; the water pump is used for pumping water flow to the guide vane assembly so as to enable the guide vane assembly to rotate, and therefore the flow speed of the water flow is increased.
5. The apparatus of claim 1, wherein the height of the water inlet of said truss assembly is lower than the height of the water inlet of said reservoir; the height of the water outlet of the truss unit is higher than that of the sand discharge hole of the reservoir.
6. The apparatus of claim 2, wherein the first guiding portion has an arc shape, and an opening direction of the arc shape is identical to a water inlet direction of the target truss assembly.
7. The apparatus of claim 5, further comprising: a sand discharge pool; the sand discharging pool is arranged at a sand discharging hole of the reservoir.
8. The apparatus of claim 4, wherein the speed and angle of rotation of said vane assembly is determined based on the capacity of said reservoir and the size of said discharge opening of said reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210623851.6A CN114875840B (en) | 2022-06-02 | 2022-06-02 | Sediment discharge device for reservoir sediment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210623851.6A CN114875840B (en) | 2022-06-02 | 2022-06-02 | Sediment discharge device for reservoir sediment |
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| CN114875840A CN114875840A (en) | 2022-08-09 |
| CN114875840B true CN114875840B (en) | 2022-12-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319705A (en) * | 2001-04-03 | 2001-10-31 | 太原理工大学 | Spiral flow desilting equipment |
| KR20090113729A (en) * | 2008-04-28 | 2009-11-02 | 포항공과대학교 산학협력단 | Biofilm reactor having a helix structure and apparatus for water treatment using the same |
| CN108532563A (en) * | 2018-04-16 | 2018-09-14 | 浙江水利水电学院 | The remote sand flushing system of reservoir |
-
2022
- 2022-06-02 CN CN202210623851.6A patent/CN114875840B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319705A (en) * | 2001-04-03 | 2001-10-31 | 太原理工大学 | Spiral flow desilting equipment |
| KR20090113729A (en) * | 2008-04-28 | 2009-11-02 | 포항공과대학교 산학협력단 | Biofilm reactor having a helix structure and apparatus for water treatment using the same |
| CN108532563A (en) * | 2018-04-16 | 2018-09-14 | 浙江水利水电学院 | The remote sand flushing system of reservoir |
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| CN114875840A (en) | 2022-08-09 |
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