CN106351170B - It is a kind of to determine head diversion water distributing device - Google Patents

It is a kind of to determine head diversion water distributing device Download PDF

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Publication number
CN106351170B
CN106351170B CN201610667822.4A CN201610667822A CN106351170B CN 106351170 B CN106351170 B CN 106351170B CN 201610667822 A CN201610667822 A CN 201610667822A CN 106351170 B CN106351170 B CN 106351170B
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water
flow
chamber
pipe
spoiler
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CN106351170A (en
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郭长强
崔远来
罗玉峰
刘方平
谢亨旺
王少华
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Wuhan University WHU
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Wuhan University WHU
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B1/00Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
    • E02B1/02Hydraulic models

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

Determine head diversion water distributing device the invention discloses a kind of, there is the casing of opening including a upper surface, it is provided with casing and is classified as overflow chamber and goes out the cutoff board in flow chamber two parts space, it is provided with overflow chamber and is classified as turbulence chamber and the spoiler in stationary stream room two parts space, the casing of turbulence chamber is provided with the water inlet pipe being connected with water supply line, spoiler is provided with densely covered flowing hole, and stationary stream room and the cutoff board gone out between flow chamber are provided with overflow launder;The casing of stationary stream room is provided with the isocon of multiple different heights, and highest isocon is highly less than overflow groove height, and the casing for going out flow chamber is provided with the outlet pipe for discharging water, and cut-off equipment is equipped with outlet pipe and isocon.The present invention can be adjusted according to test flow design requirement to excessive come water-carrying capacity, unnecessary water is reclaimed by outlet pipe, avoids abandoning water, its simple structure, applicating maintenance is convenient, can be widely applied to need in waterpower water flow test and the hydraulic engineering of constant flow control.

Description

Constant head shunting water distribution device
Technical Field
The invention belongs to the technical equipment field of water conservancy facilities, and relates to technical equipment for automatically and accurately distributing water according to the requirement of water outlet flow, in particular to a constant head distributing water distribution device.
Background
When a water flow hydraulics test is carried out in the field, test scenes under different working condition levels are often met by setting different water inflow levels. Different from the good conditions that scientific research equipment in a laboratory is complete and advanced and water supply equipment can be adjusted in multiple stages according to the test flow requirement, the field water flow hydraulics test can only supply water with a constant flow and a constant head through a single-stage water pump. In order to meet the requirements of different test water inflow rates, a plurality of small-flow water pumps are often configured to meet the requirements of different water inflow rates. However, when the variation range of the flow required by the test is large, the number of the required small-flow water pumps is large, and certain expenditure pressure and complexity and inconvenience in operation management are caused to scientific research and test personnel. Meanwhile, under the condition of modern industrial production line, the type of the water pump, namely the interval change of flow and lift, is basically fixed, and the flow requirement required by a tester can not be solved by the combination of water pumps with different flows. Even if the multistage adjustable water pump is adopted, the flow regulation variation range is limited, and the flow regulation interval is fixed and cannot be randomly adjusted according to the test requirement.
Therefore, the invention tries to meet the requirement of the maximum flow by configuring a submersible pump combination which meets the requirement of the maximum flow according to the maximum flow required by the submersible pump combination or a few submersible pumps with slightly small flow according to the economical and practical characteristics by floating according to the change of the test flow, and then accurately and automatically distributes the larger water inflow according to the requirement of the required flow through the automatic flow distribution and water distribution design of the device, so the device has the advantages of simple management, low operation cost and strong popularization applicability.
The invention belongs to a constant head nozzle outflow device. Reynolds tests on laminar and turbulent flow, and darcy's law test set-up, were earlier with respect to constant head headers. In addition, in most of hydraulic experiments, a constant water head outflow device is arranged to meet the requirement of stable flow in the experiment process. In addition, according to the preset flow grade, each water outlet of the device is accurately positioned so as to meet the requirements of different test flows.
Disclosure of Invention
The invention aims to: the device is used for carrying out multi-stage flow distribution water distribution on overlarge inflow water according to the outflow water flow requirement in scientific experiments or engineering applications. The method is realized by the following technical scheme:
the utility model provides a constant head reposition of redundant personnel water distribution device which characterized in that: the overflow chamber is internally provided with a spoiler which divides the box into two spaces of an overflow chamber and an outflow chamber, the overflow chamber is internally provided with a spoiler which divides the box into two spaces of a turbulence chamber and a static flow chamber, the spoiler and the spoiler are both arranged in the vertical direction, the box body of the turbulence chamber is provided with a water inlet pipe connected with a water supply pipeline, the spoiler is provided with densely distributed overflowing holes, and the upper end of the spoiler between the static flow chamber and the outflow chamber is cut into a groove to form an overflow groove; the box body of the static flow chamber is provided with a plurality of shunt tubes with different heights, the highest shunt tube is lower than the overflow groove, the box body of the outflow chamber is provided with an outlet pipe for discharging water, and the outlet pipe and the shunt tubes are both provided with cut-off devices.
As an improvement, the flow blocking plates are provided with two flow passing holes which are arranged in a staggered mode so as to increase the effect of reducing the speed and dissipating energy.
As an improvement, the aperture of the overflowing hole on the flow blocking plate is smaller than the inner diameter of the water inlet pipe, so that the water flow at the outlet of the water inlet pipe is reduced to directly enter the static flow chamber, and the effect of reducing the speed and dissipating the energy of the flow blocking plate is improved.
As an improvement, the aperture of the overflowing hole on the flow blocking plate is 1/2-1/4 of the inner diameter of the water inlet pipe, so that the flow blocking plate has better energy dissipation effect by reducing the speed.
As an improvement, 2-8 shunt tubes are arranged, and 2-4 water outlet tubes are arranged; the intercepting device is a rubber soft plug arranged on a water outlet pipe or a shunt pipe on the inner side of the box body, and the quantity selection of the water outlet pipe and the shunt pipe is realized in a very simple mode, so that the discharge flow size selection of the outflow chamber and the constant head flow distribution of the static flow chamber are realized.
As the improvement, be equipped with the reducing connector on the inlet tube, the outlet pipe is equipped with the external pipe, the external pipe is used for leading-in appointed place with the unnecessary rivers of play flow chamber, avoids abandoning water, practices thrift the protection water resource.
As an improvement, the length-diameter ratio of the shunt tubes is 3-4, and the water yield of a single shunt tube is increased due to the hydraulic phenomenon that water flows out through the short tubes and the full tubes on the outlet section.
As an improvement, the height of the overflow groove is lower than that of the box body and the spoiler, so that the turbulence chamber and the static flow chamber are distinct in functional partition, and the interference of unstable water in the turbulence chamber on the static flow chamber is reduced.
As the improvement, the box, separate and flow the board, the spoiler, the shunt tubes and the outlet pipe all adopt the thermoplastic plastics to make, the aforesaid parts that all plastics were made adopt the hot melt adhesive rifle to assemble, can greatly increase the anticorrosive ability of the device, and the cost is cheap simultaneously, and the equipment is convenient and fast, and the device is light portable, is fit for field work, has fine practicality.
As an improvement, the box body, the flow isolating plate, the flow blocking plate, the flow dividing pipe and the water outlet pipe are all made of stainless steel or aluminum alloy materials, all the parts are assembled by welding rod welding guns, good corrosion resistance is provided, and meanwhile, the anti-falling and anti-pressure characteristics are achieved, and the anti-falling and anti-pressure box is well suitable for field operation.
The invention has the advantages that the function of small-flow multi-stage regulation can be met by selecting proper overflow height and the size of the pipe diameter of the water outlet pipe nozzle according to the requirement of field test flow gradation, and the fine division of corresponding test flow is realized. Simultaneously, through the rational connection of the outlet pipe pipeline of the outflow chamber, water abandoning can be completely avoided, and water resources are saved and protected. The structure is simple, light and compact, and convenient to maintain.
Drawings
Fig. 1 is a southeast axial view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a right side view of the present invention.
Fig. 5 is a front view of the inner cutoff of the present invention.
FIG. 6 is a front view of the spoiler.
In the figure, 1-a water inlet pipe, 2-a spoiler, 3-an overflowing hole, 4-a shunt pipe, 5-a flow isolating plate, 6-an overflow trough, 7-a water outlet pipe, 8-a rubber soft plug, 9-a turbulent flow chamber, 10-a static flow chamber and 11-an outflow chamber.
Detailed Description
The device of the present invention will be further described with reference to the following detailed description and accompanying drawings.
Referring to fig. 1-5, a constant head water distribution device comprises a box body with an opening at the upper end, a flow partition plate 5 is arranged in the box body and divides the box body into two spaces of an overflow chamber and an outflow chamber 11, a spoiler 2 is arranged in the overflow chamber and divides the box body into two spaces of a turbulence chamber 9 and a static flow chamber 10, the flow partition plate 5 and the spoiler 2 are both arranged in the vertical direction, a water inlet pipe 1 connected with a water supply pipeline is arranged on the box body of the turbulence chamber 9, densely distributed overflow holes 3 are arranged on the spoiler 2 to increase inflow resistance so as to reduce the flow rate of water entering the box body and impact force caused by the flow rate, and a groove is cut at the upper end of the flow partition plate 5 between the static flow chamber 10 and the outflow chamber 11 to form an overflow groove 6; the box body of the static flow chamber 10 is provided with a plurality of shunt tubes 4 with different heights, the highest shunt tube 4 is lower than the overflow groove 6, the box body of the outflow chamber 11 is provided with a water outlet pipe 7 for discharging water, and the water outlet pipe 7 and the shunt tubes 4 are both provided with rubber soft plugs 8. The two flow blocking plates 2 are arranged, and the overflowing holes 3 on the two flow blocking plates 2 are arranged in a staggered mode to increase the effect of reducing the speed and dissipating energy. The aperture of the overflowing hole 3 on the flow blocking plate 2 is smaller than the inner diameter of the water inlet pipe 1, and the aperture of the overflowing hole 3 is preferably 1/2-1/4 of the inner diameter of the water inlet pipe 1.
The height of the overflow groove 6 is determined by controlling the constant head outflow height according to the maximum flow requirement.
The height of the water outlet pipe 7 is different according to different flow requirements.
The number of the shunt tubes 4 is 2-8, the number of the outlet pipes 7 is 2-4, the number of the shunt tubes 4 is 4, and the shunt tubes 4 close to the upper end can be distributed in a staggered manner without being in a vertical line.
The water inlet pipe 1 is provided with a reducer union, the water outlet pipe 7 is provided with an external pipe, and the external pipe is used for guiding redundant water flow of the outflow chamber 11 into a designated place, so that water is prevented from being abandoned, and water resources are saved and protected.
The length-diameter ratio of the shunt pipe 4 is 3-4.
The height of the overflow groove 6 is lower than that of the box body and the spoiler 2.
The flow of all the shunt pipes 4 is predetermined according to the test flow grading requirement, and the excessive incoming flow can be accurately and automatically shunted and distributed by determining the height of the overflow groove 6 without any other manual intervention or power driving.
The box body, the flow isolating plate 5, the flow baffle plate 2, the flow dividing pipe 4 and the water outlet pipe 7 are all made of stainless steel, aluminum alloy materials or thermoplastic plastics, and parts made of all the plastics are assembled by a welding rod welding gun or a hot melt adhesive gun.
The inner diameters of all the shunt tubes 4 are graded according to the flow rate designed by the test, the size of the device is mainly characterized by high size and portability, and meanwhile, certain spacing of the shunt tubes 4 is reserved, and the device is obtained by reversely pushing by using a nozzle outflow formula.
The determination of the notch height of the overflow channel 6 is determined by the internal diameter of the shunt 4 and the maximum or greater outflow (if combined outflow occurs), the notch position occurring within the static flow chamber 10, the notch height being lower than the height of the entire device.
The turbulence chamber 9 is separated from the static chamber 10 by the spoiler 2, and water flow is dissipated by the turbulence chamber 9 and then smoothly enters the static chamber 10 to ensure the overflow height of the static chamber 10 to be stable, so that fluctuation of the overflow height of the static chamber 10 due to large water impact force is avoided.
The water outlet pipes 7 with proper apertures and numbers are arranged in the outflow chamber 11 according to the maximum overflow amount, so that the sufficient outflow capacity is ensured to ensure that the water flow in the static flow chamber 10 can freely overflow the overflow groove 6.
The water outlet pipe 7 and the water inlet pipe 1 are connected with an external water pipe through quick connectors, and the installation and the disassembly are convenient.
When the inflow rate of the external water source is large, a plurality of groups of tests and multiple shunting can be simultaneously carried out by combining the outflow rate.
The setting is at the shunt tubes 4 of the constant flow of co-altitude, opens shunt tubes 4 of co-altitude not according to experimental flow requirement and makes rivers get into the test district with the form that the nozzle is flowed, and outlet pipe 7 is connected external pipeline and will be unnecessary to flow into other test districts or directly return the water source, using water wisely.
In order to consider the economy and the convenient application, all the pipe orifices are controlled to be opened and closed by rubber soft plugs 8 with corresponding pore sizes.
The box body can be made of full PVC plates and assembled by a corresponding welding rod welding gun and a hot melt adhesive gun; it can also be made of stainless steel or aluminum alloy. In a word, the characteristics of field test are combined when selecting the manufacturing material, and the portability, the sealing property and the corrosion resistance of the material are emphatically considered.
The technical principle of the box body is nozzle outflow in hydraulics. The nozzle outflow is the hydraulic phenomenon that a short pipe with the length of 3-4 times of the aperture is connected to the opening of the wall of the container, and water passes through the short pipe and flows out of the pipe at the outlet section. The nozzle outlet flow velocity calculation formula is as follows (1):
the nozzle flow calculation formula is as follows (2):
wherein,is the flow rate coefficient; mu.snIs the flow coefficient; epsilon is the shrinkage coefficient; g is the acceleration of gravity, 9.8m/s2(ii) a A is the cross-sectional area of the orifice of the nozzle, m2;H0Is the effective head, m. Coefficient of flow velocity in nozzle outflowBecause the outlet is not contracted,
the cylindrical outer nozzle is vacuumed at the reduced section with a vacuum of 0.75H0. This corresponds to an increase of 75% in the applied head of the nozzle, which is why the cylindrical outer nozzle outflow is larger than the orifice outflow for the same diameter and the same applied head. In addition, the condition of nozzle outflow is limited, and the normal working condition is that the action water head H is limited by considering the limit of water body vacuum gasification0Should be less than or equal to 9m, and the outer nozzle length is generally 3-4 times the inner pore diameter in consideration of nozzle vacuum occurrence condition and on-way head loss.
The box body is of a square cavity structure, the front side surface of the outer part of the box body is provided with the shunt tubes 4 which have different heights and adopt the nozzle outflow principle, the lower part of one side surface of the left side surface and the right side surface (taking the outflow direction facing the shunt tubes 4 as the positive direction) is provided with the water inlet pipe 1 as an example, the lower part of the left side surface is provided with the water outlet pipe 7, and the rear side surface of the box body can be provided with the water outlet pipe 7 according to the actual. The interior of the box body of the invention is divided into an overflow chamber and an outflow chamber 11 by a flow partition plate 5, a flow baffle plate 2 is arranged at the water inlet position in the overflow chamber, and the overflow chamber can be further divided into a turbulent flow chamber 9 and a static flow chamber 10 according to the arrangement of the flow baffle plate 2.
The water inlet pipe 1 is a hard short pipe connected with an external water inlet hose, the material of the water inlet pipe must be hard to facilitate the fastening connection of the external hose and the water inlet pipe, and the water inlet pipe must be compatible with the material characteristics of the whole box body structure to facilitate welding or gluing so as to ensure the integrity and the sealing property. The outer diameter of the water inlet pipe 1 is equal to the inner diameter of the external water receiving pipe so as to be connected, and the reducing joint can be arranged on the water inlet pipe 1 so as to be connected with the external water receiving pipes with different inner diameter sizes.
The flow blocking plates 2 are made of hard materials with the surfaces being uniform and the small calibers being densely distributed with the flow passing holes 3, are resistant to water flow impact, are compatible with materials on all sides of an overflow chamber, are firm in contact connection, can be generally provided with two layers of flow blocking plates 2, and are beneficial to reducing the flow speed and reducing the water flow impact due to the staggered arrangement of the flow passing holes 3 on the two plates.
The flow isolating plate 5 is a controllable structure of the whole box body, and the height of the overflow groove 6 determines the outflow capacity and the adjusting range of the box body. The height of the overflow groove 6 on the flow isolating plate 5 is calculated by utilizing the nozzle outflow formula according to the maximum outflow rate required by an actual test, the proper size of the whole box body and the inner diameter size of the shunt pipe 4. The notch position is limited within the range of the static flow chamber 10, no notch is made within the range of the turbulent flow chamber 9, and the height of the flow baffle 5 at the turbulent flow chamber 9 is the same as that of the main body cavity structure at the periphery of the box body.
The water outlet pipe 7 with enough outflow capacity is installed on the lower portion of the outflow chamber 11 according to the maximum overflow amount of the overflow chamber, the water outlet pipe 7 is externally connected with an outflow hose, redundant outflow is guided into a test water source or the next test place, water abandonment is reduced or even stopped, water is saved, and water resources are protected.
The choice of the internal diameter of the shunt tubes 4 determines the height dimension of the whole tank, given the maximum outflow and the gradation required by the test. The installation height of the shunt tubes 4 is calculated by the formula according to the inner diameter and the flow rate of the shunt tubes, and the shunt tubes 4 with the installation height close to each other are arranged in a staggered mode. When the outflow of the single shunt pipe 4 can not meet the flow requirement, the combined outflow through the shunt pipes 4 meets the requirement.
All the shunt tubes 4 and the water outlet pipes 7 in the static flow chamber 10 and the outflow chamber 11 are sealed by rubber soft plugs 8 with corresponding sizes, and the rubber soft plugs 8 of the corresponding water outlet pipes 7 are opened according to different test flow requirements.
The working process of the invention is as follows:
1. the rubber cork 8 of the corresponding flow shunt 4 is opened according to the test requirements.
2. An external water supply pipe is connected with the water inlet pipe 1 of the box body turbulent chamber 9 and is fixed through a hoop and other facilities. And an external water source switch is started, external water enters the turbulent flow chamber 9 through the water inlet pipe 1, is subjected to energy dissipation through the spoiler 2 and then enters the static flow chamber 10.
3. The water depth in the static flow chamber 10 is continuously increased, the opened shunt tubes 4 start to discharge water, and the discharge quantity of the shunt tubes 4 is continuously increased along with the continuous increase of the water head. When the water depth in the static flow chamber 10 rises to a preset overflow height, the excessive water flow automatically overflows the overflow groove 6 and enters the outflow chamber 11.
4. According to the overflow volume in the overflow chamber, the water outlet pipe 7 of the overflow chamber 11 is correspondingly opened to ensure that the excess water in the overflow chamber can freely overflow the overflow groove 6 and ensure the water level in the static flow chamber 10 to be constant.
5. The water outlet pipe 7 is connected with an external water guide pipe, and the redundant outflow is guided into a preset place.
6. After a group of tests are finished, the device is moved to the next test point or the opening number of the shunt pipe 4 is changed, and the next test can be carried out by repeating the steps 1 to 5.
7. After the test is finished, an external water source is closed, and after residual water in the box body of the device is drained, the connection between the water inlet pipe 1 and the water outlet pipe 7 and an external water pipe is disconnected so as to facilitate maintenance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a constant head reposition of redundant personnel water distribution device which characterized in that: the overflow chamber is internally provided with a spoiler which divides the box into two spaces of an overflow chamber and an outflow chamber, the overflow chamber is internally provided with a spoiler which divides the box into two spaces of a turbulence chamber and a static flow chamber, the spoiler and the spoiler are both arranged in the vertical direction, the box body of the turbulence chamber is provided with a water inlet pipe connected with a water supply pipeline, the spoiler is provided with densely distributed overflowing holes, and the upper end of the spoiler between the static flow chamber and the outflow chamber is cut into a groove to form an overflow groove; the box body of the static flow chamber is provided with a plurality of shunt tubes with different heights, the highest shunt tube is lower than the overflow groove, the box body of the outflow chamber is provided with a water outlet pipe for discharging water, and the water outlet pipe and the shunt tubes are both provided with cut-off devices.
2. A constant head water distribution apparatus according to claim 1, characterized in that: the two flow blocking plates are arranged, and the overflowing holes in the two flow blocking plates are arranged in a staggered mode to increase the speed reduction and energy dissipation effects.
3. A constant head water distribution apparatus according to claim 2, characterized in that: the aperture of the overflowing hole on the flow blocking plate is smaller than the inner diameter of the water inlet pipe.
4. A constant head water distribution apparatus according to claim 3, characterized in that: the aperture of the overflowing hole on the flow blocking plate is 1/2-1/4 of the inner diameter of the water inlet pipe.
5. A constant head water distribution apparatus according to claim 2, characterized in that: 2-8 flow dividing pipes are arranged, and 2-4 water outlet pipes are arranged; the cut-off device is a rubber soft plug arranged on the water outlet pipe or the shunt pipe on the inner side of the box body.
6. A constant head water distribution apparatus according to claim 2, characterized in that: the water outlet pipe is provided with an external pipe, the external pipe is used for guiding redundant water flow of the outflow chamber into a designated place, water abandonment is avoided, and water resources are saved and protected.
7. A constant head water distribution apparatus according to claim 2, characterized in that: the length-diameter ratio of the shunt pipe is 3-4.
8. A constant head water distribution apparatus according to claim 2, characterized in that: the height of the overflow groove is lower than that of the box body and the spoiler.
9. A constant head tap water distribution apparatus according to any one of claims 1 to 8, further comprising: the box body, the flow isolating plate, the flow baffle plate, the flow dividing pipe and the water outlet pipe are all made of thermoplastic plastics, and all the parts made of the plastics are assembled by a hot melt adhesive gun.
10. A constant head tap water distribution apparatus according to any one of claims 1 to 8, further comprising: the box body, the flow isolating plate, the flow baffle plate, the flow dividing pipe and the water outlet pipe are all made of stainless steel or aluminum alloy materials, and all the parts are assembled by a welding rod welding gun.
CN201610667822.4A 2016-08-15 2016-08-15 It is a kind of to determine head diversion water distributing device Active CN106351170B (en)

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Application Number Priority Date Filing Date Title
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CN106351170B true CN106351170B (en) 2018-03-27

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CN107338769B (en) * 2017-07-05 2019-02-19 中铁十局集团第五工程有限公司 Construction method and split-flow baffles bin device based on split-flow baffles storehouse

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US3769803A (en) * 1972-02-23 1973-11-06 Phillips Petroleum Co Submerged storage vessel
CN201489709U (en) * 2009-07-15 2010-05-26 西北农林科技大学 Orifice pipe mouth effluent teaching experimental apparatus with changeable water head
CN104748801B (en) * 2015-03-31 2017-10-13 浙江大学 A kind of water tank goes out the flow measurement device of stream

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