CN209992140U - Model sand selection device for density flow physical model test - Google Patents
Model sand selection device for density flow physical model test Download PDFInfo
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- CN209992140U CN209992140U CN201920939633.7U CN201920939633U CN209992140U CN 209992140 U CN209992140 U CN 209992140U CN 201920939633 U CN201920939633 U CN 201920939633U CN 209992140 U CN209992140 U CN 209992140U
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Abstract
The utility model provides a husky selecting arrangement of model for different heavy stream physical model test relates to different heavy stream physical model test technical field based on basic basin is experimental, has solved and has not been used for selecting the technical problem who has the husky device of model of specific characteristic among the prior art. A model sand selecting arrangement for abnormal heavy flow physical model test includes muddy water bin, muddy water conveyor, muddy water outflow controlling means, detection device and riverbed analogue means, muddy water bin pass through muddy water conveyor with muddy water outflow controlling means is linked together, muddy water outflow controlling means with riverbed analogue means is linked together the utility model discloses the model sand that the operator screened needs according to the model sand flow rate, thickness and the turbidity value characteristic of the abnormal heavy flow that different conditions formed under can make the operator be in order to carry out the low sand content abnormal heavy flow physical model test, filled the blank that is used for selecting the husky device of model that has specific characteristics.
Description
Technical Field
The utility model belongs to the technical field of the experimental technique of density flow physical model based on basic basin is experimental, and especially, relate to a husky selection device of model for density flow physical model is experimental.
Background
The density flow refers to a laminar flow generated by a difference in fluid density in a gravity field, and is also called as a density flow or a gravity flow. The temperature of each part of the water flow is different, and the water flow carries fine silt or contains salt and the like, so that the density difference of the fluid is generated to form the density difference flow. The density of the fluid can be divided into two types, a two-layer system and a multi-layer system. In nature, the expression form of the density flow is layered undercurrent in a reservoir, salt water at the sea entrance of a river invades fresh water, and frontal surface formed by cold and warm air flow in the atmosphere and the like. As for the water flow, the main factors causing the density difference are sand content, water temperature and solute content. The density flow formed by the silt carried by the water flow is called muddy water density flow. Turbid river water flowing into the reservoir forms tongue-shaped water flow to submerge into the reservoir bottom, and moves forwards along the reservoir bottom under clear water of the reservoir to form reservoir density flow; the two rivers are intersected, and when the sand content of the water flow is different, the layered movement phenomenon can be generated at the junction to form river channel density flow. The density flow caused by the difference in water flow temperature is called temperature difference density flow. The cold river water entering the lake (or reservoir) submerges into the bottom of the lake to form lower layer density flow to move forwards; after being heated by the condenser and discharged into a river, the cooling water of the thermal power plant flows along the way on the upper layer of the cooler river water to form an upper layer density flow. Because the density flow formed by the salinity contained in the water flow is called as the salt water density flow, the density flow of the muddy water moving at the bottom of the reservoir can be reasonably used for discharging the silt, so that the reservoir sedimentation is reduced, and the method is a main measure for reducing the silt of the reservoir; in the water supply engineering, the sedimentation tank is designed according to the characteristics of the density flow, so that the silt can fall off and the better water quality can be obtained; the thermal power plant can be built by utilizing the characteristic of temperature difference gravity flow, a deeper water taking hole is arranged to draw cold water, and a higher water discharging hole is arranged to discharge hot water, so that the life of people can be facilitated by researching and utilizing the characteristic of gravity flow. In the research of the density flow, people generally use model sand to test in a simulation test device, but no device for screening the model sand with specific characteristics exists in the prior art so as to conveniently use the screened model sand to perform the density flow physical model test containing the specific sand.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a husky selection device of model for different heavy flows physical model is experimental to solve and not be used for selecting the technical problem who has the husky device of model of specific characteristic among the prior art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a model sand selecting arrangement for abnormal heavy flow physical model test, including muddy water bin, muddy water conveyor, muddy water outflow controlling means, detection device and the riverbed analogue means that contain model sand, the muddy water bin passes through muddy water conveyor with muddy water outflow controlling means is linked together, muddy water outflow controlling means with riverbed analogue means is linked together, wherein be annotated with the clear water among the riverbed analogue means, different kind of model sand simulates table, well, bottom muddy water abnormal heavy flow respectively through adjusting the temperature difference between clear water and the muddy water, and people can be used through the change of control muddy water sand content and the change of muddy water flow when every kind of model sand forms table, well, bottom water abnormal heavy flow respectively detection device measures the velocity of flow of multiunit muddy water abnormal heavy flow at different times, And (4) recording the data of the thickness and the turbidity value, and selecting the required model sand by comparing the data.
Optionally, the muddy water outflow flow control device is a tank body, and the side wall of the tank body is provided with flow holes, and the widths of the flow holes on different horizontal planes are different.
Optionally, the flow orifice is circular.
Optionally, the riverbed simulation device comprises a water tank, a forebay and a bottom slope, the forebay and the bottom slope are arranged in the water tank, the forebay is connected with the bottom slope, the water tank support is made of a metal framework, and the side wall of the water tank support is made of a transparent material.
Optionally, the height of the forebay in the water tank is higher than that of the bottom slope, a connecting part of the forebay and the bottom slope is an inclined plane, and the height of the bottom slope is gradually reduced from the forebay to the tail end of the water tank.
Optionally, the muddy water conveying device is a water pump conveying device.
Optionally, a stirring device is arranged in the muddy water storage tank.
Optionally, the detection device comprises a camera, which is movably arranged near the water tank.
Optionally, the detection device includes an electromagnetic current meter, and the electromagnetic current meter is disposed at the beginning end of the bottom slope.
Optionally, the detection device further comprises an OBS3+ turbidity meter to measure the turbidity of the heavy stream.
The utility model provides a model sand selecting arrangement for density flow physical model test, including muddy water storage tank, muddy water conveyor, muddy water outflow controlling means, detection device and riverbed analogue means that contain model sand, muddy water storage tank passes through muddy water conveyor with muddy water outflow controlling means communicates, muddy water outflow controlling means with riverbed analogue means communicates, wherein it has clear water to annotate among the riverbed analogue means, the utility model discloses can simulate the formation and the evolution process of density flow in the riverway in riverbed analogue means to enable the operator to select the required model sand according to the velocity of flow, thickness and the value turbidity characteristic of density flow that different model sands formed under different conditions in order to carry out the density flow physical model test of low sand content, the utility model has simple structure and convenient use, fills the gap of the device for selecting the model sand with specific characteristics.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of a model sand selecting device for a physical model test of a density flow according to the present invention;
fig. 2 is a right side view of a muddy water outflow rate control apparatus of the model sand selecting apparatus for the density flow physical model test.
FIG. 1 shows a muddy water storage tank; 2. a muddy water conveying device; 3. a muddy water outflow flow control device; 4. a riverbed simulation device; 5. a flow orifice; 6. a water tank; 7. a forebay; 8. and (6) bottom slope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model provides a model sand selecting arrangement for abnormal heavy flow physical model test, as shown in fig. 1, including muddy water bin 1, muddy water conveyor 2, muddy water outflow controlling means 3, detection device and riverbed analogue means 4 that contain model sand, muddy water bin 1 passes through muddy water conveyor 2 with muddy water outflow controlling means 3 is linked together, muddy water outflow controlling means 3 with riverbed analogue means 4 is linked together, wherein pour into the clear water in riverbed analogue means 4, different kind of model sand is respectively through adjusting the temperature difference between clear water and the muddy water simulation table, well, bottom muddy water abnormal heavy flow, and people can be used through the change of control muddy water sand content and the change of muddy water flow when every kind of model sand is respectively forming table, well, bottom muddy water abnormal heavy flow the velocity of flow at different times of multiunit muddy water abnormal heavy flow is measured to detection device, And (4) recording the data of the thickness and the turbidity value, and selecting the required model sand by comparing the data.
The utility model discloses can simulate the formation and the evolution process of the density flow in the river course in riverbed analogue means 4 to enable the operator to select the model sand that needs according to the velocity of flow, thickness and the turbidity value characteristic of the density flow that different model sands formed under different conditions in order to carry out the physical model test of the density flow of low sand content, the utility model discloses simple structure, convenient to use has filled the blank that is used for selecting the husky device of model that has specific characteristics;
furthermore, a muddy water storage tank 1 is arranged in front of the muddy water outflow flow control device 3, the muddy water storage tank 1 is communicated with the muddy water outflow flow control device 3 through the muddy water conveying device 2, and the muddy water is conveyed to the muddy water outflow flow control device 3, so that the fluctuation of the muddy water in the muddy water outflow flow control device 3 can be reduced as much as possible, the muddy water stably flows out of the muddy water outflow flow control device 3, and the stability of the test is ensured.
In an alternative embodiment, as shown in fig. 2, the muddy water outflow flow rate control means 3 is a tank body having a flow hole 5 opened in a side wall thereof, and the flow hole 5 has different widths in different horizontal planes.
Muddy water outflow flow control device 3 is the box for temporarily save muddy water, the box lateral wall is opened there is flow hole 5, and muddy water can be followed flow hole 5 internal flow to the simulation of riverbed analogue means 4 deadweight stream, flow hole 5 width on different horizontal planes is different, can follow the flow that muddy water flows from flow hole 5 in the water level height control muddy water in the box to make the user can control experimental variable, and this simple structure is practical.
In an alternative embodiment, the flow orifice 5 is circular.
The flow hole 5 of the utility model is circular, which makes the difference of the outflow of muddy water larger and the outflow is easy to calculate; the diameter of the flow orifice 5 is preferably 2.5 cm.
As an optional implementation manner, the riverbed simulation apparatus 4 includes a water tank 6, a front pool 7 and a bottom slope 8, the front pool 7 and the bottom slope 8 are disposed in the water tank 6, the front pool 7 is connected with the bottom slope 8, a bracket of the water tank 6 is made of a metal framework, and a side wall of the water tank is made of a transparent material.
The riverbed simulation device 4 of the utility model comprises a water tank 6, a forebay 7 and a bottom slope 8, wherein the forebay 7 and the bottom slope 8 are arranged in the water tank 6, the forebay 7 is connected with the bottom slope 8, the water tank 6 simulates a river channel, the bottom slope 8 simulates the bottom and the lower reaches of a river, the forebay 7 is used for eliminating the potential energy of muddy water falling from a muddy water outflow flow control device 3, and the muddy water flows to the bottom slope 8 from the forebay 7 to form a density flow; the bracket of the water tank 6 adopts a metal framework, so that the strength of the water tank 6 is fully ensured, and the side wall is made of transparent materials, so that the observation in the test is facilitated; further, the water tank 6 has a total length of 30m, a width of 0.1m and a height of 0.8 m.
In an alternative embodiment, the height of the front pool 7 in the water tank 6 is higher than the height of the bottom slope 8, the connection part of the front pool 7 and the bottom slope 8 is an inclined plane, and the height of the bottom slope 8 is gradually reduced from the front pool 7 to the tail end of the water tank 6.
In the water tank 6, the height of the front pool 7 is higher than that of the bottom slope 8, so that mixed water can flow from the front pool 7 to the bottom slope 8 conveniently; the connecting part of the front pool 7 and the bottom slope 8 is an inclined plane, so that muddy water can be uniformly transferred to the bottom slope 8, the muddy water is stable, and the reliability of the experiment can be guaranteed; the height of the bottom slope 8 is gradually reduced from the front pool 7 to the tail end of the water tank 6, and the bottom slope is used for simulating the upstream and the downstream of a river channel, so that the test is closer to the real condition, and the reliability of the test result is ensured.
In an alternative embodiment, the muddy water conveying device 2 is a water pump conveying device.
Muddy water conveyor 2 is water pump conveyor, and the commonality is strong, and convenient to use.
As an alternative embodiment, a stirring device is provided in the muddy water storage tank 1.
Be provided with agitating unit among the muddy water bin 1, prevent the sediment of muddy water to the assurance test goes on smoothly.
As an alternative embodiment, the detection means comprise a camera, which is movably arranged in the vicinity of the water bath 6.
Detection device includes the camera, the camera is portable to be set up near basin 6, tracks down the heavy head of flowing with the camera and removes the shooting to record the heavy time of flowing each sectional arrival.
In an alternative embodiment, the detection device includes an electromagnetic current meter, and the electromagnetic current meter is disposed at the starting end of the bottom slope 8.
Electromagnetic current meter set up in 8 initiating terminals on the bottom slope are used for measuring the velocity of flow.
As an optional embodiment, the detection device further comprises an OBS3+ turbidity meter to measure the turbidity of the heavy stream.
Detection device still includes OBS3+ turbidity appearance, adopts OBS3+ turbidity appearance record density of flow along journey head turbidity value and each section perpendicular line turbidity value, and 3-5 points are surveyed to every section muddy water layer, obtains the sand content by appointed tester turbidity and the relation of sand content of demarcating in earlier stage again after the experiment.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A model sand selecting arrangement for different heavy current physical model test which characterized in that: the muddy water flow simulation device comprises a muddy water storage tank (1) containing model sand, a muddy water conveying device (2), a muddy water outflow flow control device (3), a detection device and a riverbed simulation device (4), wherein the muddy water storage tank (1) is communicated with the muddy water outflow flow control device (3) through the muddy water conveying device (2), the muddy water outflow flow control device (3) is communicated with the riverbed simulation device (4), clear water is injected into the riverbed simulation device (4), different types of model sand simulate the flow of muddy water at a meter, a middle layer and a bottom layer respectively by adjusting the temperature difference between the clear water and the muddy water, and people can measure the flow speed of a plurality of groups of muddy water flow at different times by using the detection device through controlling the change of the sand content of the muddy water and the change of the flow of the muddy water when the various types of model sand form the flow of the meter, the middle layer and the bottom layer muddy water at different times, And (4) recording the data of the thickness and the turbidity value, and selecting the required model sand by comparing the data.
2. The model sand selection device for a physical model test of a different gravity flow according to claim 1, wherein: the muddy water outflow flow control device (3) is a box body, the side wall of the box body is provided with flow holes (5), and the widths of the flow holes (5) on different horizontal planes are different.
3. The model sand selecting apparatus for a physical model test of a different gravity flow according to claim 2, wherein: the flow holes (5) are circular.
4. The model sand selection device for a physical model test of a different gravity flow according to claim 1, wherein: the riverbed simulation device (4) comprises a water tank (6), a forebay (7) and a bottom slope (8), wherein the forebay (7) and the bottom slope (8) are arranged in the water tank (6), the forebay (7) and the bottom slope (8) are connected, a bracket of the water tank (6) is made of a metal framework, and the side wall of the water tank is made of a transparent material.
5. The model sand selection device for a physical model test of a different gravity flow according to claim 4, wherein: the height of the forebay (7) in the water tank (6) is higher than that of the bottom slope (8), the connecting part of the forebay (7) and the bottom slope (8) is an inclined plane, and the height of the bottom slope (8) is gradually reduced from the forebay (7) to the tail end of the water tank (6).
6. The model sand selection device for a physical model test of a different gravity flow according to claim 1, wherein: the muddy water conveying device (2) is a water pump conveying device.
7. The model sand selection device for a physical model test of a different gravity flow according to claim 1, wherein: a stirring device is arranged in the muddy water storage tank (1).
8. The model sand selection device for a physical model test of a different gravity flow according to claim 4, wherein: the detection device comprises a camera which is movably arranged near the water tank (6).
9. The model sand selection device for a physical model test of a different gravity flow according to claim 8, wherein: the detection device comprises an electromagnetic current meter, and the electromagnetic current meter is arranged at the starting end of the bottom slope (8).
10. The model sand selection device for a physical model test of a different gravity flow according to claim 9, wherein: the detection device also comprises an OBS3+ turbidity meter for measuring the turbidity of the heavy stream.
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| CN201920939633.7U CN209992140U (en) | 2019-06-21 | 2019-06-21 | Model sand selection device for density flow physical model test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110174238A (en) * | 2019-06-21 | 2019-08-27 | 黄河水利委员会黄河水利科学研究院 | A kind of model sasnd selection device and model sasnd selection method for density current physical experiments |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110174238A (en) * | 2019-06-21 | 2019-08-27 | 黄河水利委员会黄河水利科学研究院 | A kind of model sasnd selection device and model sasnd selection method for density current physical experiments |
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