CN107063855B - Erosion rate scouring test device for soil sample - Google Patents
Erosion rate scouring test device for soil sample Download PDFInfo
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- CN107063855B CN107063855B CN201710346844.5A CN201710346844A CN107063855B CN 107063855 B CN107063855 B CN 107063855B CN 201710346844 A CN201710346844 A CN 201710346844A CN 107063855 B CN107063855 B CN 107063855B
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- 239000002689 soil Substances 0.000 title claims abstract description 100
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 230000003628 erosive effect Effects 0.000 title claims abstract description 28
- 238000009991 scouring Methods 0.000 title abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000001914 filtration Methods 0.000 claims description 12
- 238000005286 illumination Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000004162 soil erosion Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a soil sample erosion rate scouring test device which comprises a control unit, a frame, a barrel body fixed on the frame, a water flow driving unit arranged on the frame, a soil sample bearing unit fixedly arranged relative to the barrel body, a circulating filter unit connected with the barrel body in a loop way, and an image acquisition unit connected with the control unit and arranged corresponding to the soil sample bearing unit. The erosion rate scouring test device for the soil sample can be used for erosion rate scouring test of the soil sample, is applicable to the soil sample with wider range of particle sizes of component particles, has wide application range, can avoid randomness of visual observation results, only needs one water injection in the whole test, has small water consumption for the test, and can reduce the cost of the test.
Description
Technical Field
The invention relates to the technical field of dam break research of earth and rockfill dams, in particular to a soil sample erosion rate scouring test device for soil sample erosion measurement soil sample scouring test of earth and rockfill dams.
Background
According to data statistics, flood topping is one of main reasons for dam break of earth-rock dams, and accounts for about 49% of the total dam break, and hydraulic flushing is the cause and dominant factor of earth-rock dam topping, so that the erosion rate of the dam building material is an important parameter in the earth-rock dam break research.
Currently, a common method for measuring erosion of earth and rockfill dam soil samples is launder test, which measures soil samples as channel base materials, and measures erosion rate by simulating water flow erosion, wherein a comparative representative is a Erosion Function Apparatus (EFA) device of j.l.briaud, which has a perfect set of calculation theory, is also adopted by a plurality of scientific research institutions, and which is also a scouring test device recommended in U.S. hydraulic engineering No. 18 notice. The basic working principle of the EFA device is that a sample is obtained through a standard Shellby tube and placed in a water tank device, water flow is set to be a constant value, the sample is lifted by 1mm, the time required for scouring the sample by 1mm is tested, so that the erosion rate is obtained, the water flow velocity is sequentially changed, the relationship between the erosion performance and the shear stress under different flow rates is obtained, and the shear stress can be obtained by water flow conversion by applying Darcy's law.
Although the erosion rate of the soil sample can be obtained by using the EFA equipment, the EFA equipment still has the following defects due to the structure and the working principle, and firstly, the equipment is high in price; secondly, due to the size of the sample loading device Shellby tube, only the samples consisting of particles with the diameter smaller than 10mm can be tested; thirdly, judging whether the lifted sample is washed away or not by naked eyes in the test process, wherein the surface of the sample is uneven in the washing process due to the non-uniformity of soil and stones, so that the observation result is not accurate enough; fourth, the EFA device ejects the sample through the piston, and when the sample ejected by the piston is insufficient to supply the flushing, i.e., the flushing speed is greater than the speed at which the sample is ejected, the measured flushing value has an upper limit value equal to the maximum lifting speed of the piston, so that the device cannot test the sample with poor impact resistance, such as non-cohesive soil.
Disclosure of Invention
In view of the above, the present invention aims to provide a soil erosion rate washout test device that can be used for a washout test of a soil sample.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The soil erosion rate washout test device comprises a control unit and further comprises:
A frame;
The barrel body is fixed on the frame;
The water flow driving unit is arranged on the frame and is provided with a rotating shaft which is rotatably arranged on the frame, one end of the rotating shaft extends into the barrel body, and a rotating driving part which is arranged on the frame and is in transmission connection with the rotating shaft, and one end of the rotating shaft, which is positioned in the barrel body, is connected with an impeller;
The soil sample bearing unit is fixedly arranged relative to the barrel body and is provided with a soil sample chamber with an opening at the top in the barrel body and an ejection mechanism arranged at the bottom of the soil sample chamber for ejecting a soil sample loaded in the soil sample chamber;
The circulating filter unit is connected with the barrel body in a loop, and is provided with a pipeline connected with the barrel body, and a pumping part and a filtering part which are connected in series on the pipeline;
And the image acquisition unit is connected with the control unit and is arranged corresponding to the soil sample bearing unit so as to acquire images of soil samples loaded in the soil sample chamber.
Further, the soil sample bearing unit is located the bottom of staving, the staving can dismantle with the bottom and set up, still include:
and the lifting unit is arranged on the frame and can be connected with the barrel wall of the barrel body so as to lift the barrel wall in a detached state.
Further, the impeller may have a position adjustment along the axis of the shaft.
Further, at least one transparent observation window is arranged on the barrel wall of the barrel body, the soil sample bearing unit is close to the barrel wall and is arranged at one observation window, and the image acquisition unit is positioned outside the observation window corresponding to the soil sample bearing unit.
Further, an annular illumination part which emits illumination light in a radial shape is arranged at the bottom of the barrel body and near the center of the barrel body.
Furthermore, the image acquisition unit adopts a Logitech C920 high-definition camera.
Further, the ejection mechanism comprises a sliding block which is arranged at the bottom of the soil sample chamber and can slide along the depth direction of the soil sample chamber, a linear driving part which is in transmission connection with the sliding block, and a detection part which detects the sliding displacement of the sliding block.
Further, the linear driving part is a motor, and the detecting part adopts a grating counter.
Further, a water storage tank is connected in series on the pipeline, the pumping part is positioned in the water storage tank, and the filtering part comprises a sedimentation barrel connected between the barrel body and the water storage tank.
Furthermore, a leveling bubble is arranged on the frame, and a supporting foot leg with adjustable height is arranged at the bottom of the frame.
Compared with the prior art, the invention has the following advantages:
According to the erosion rate scouring test device for the soil sample, scouring water flow can be simulated in the barrel body through the water flow driving unit, the soil sample can be loaded through the soil sample bearing unit and is ejected by the ejection mechanism to scour, the image acquisition unit is used for acquiring images of the soil sample at the soil sample bearing unit, the erosion rate of the soil sample can be judged by recording the scouring process of the soil sample, and the image acquisition effect of the image acquisition unit can be ensured through the arrangement of the circulating filtering unit, so that the erosion rate scouring test for the soil sample can be realized. Meanwhile, the erosion rate scouring test device for the soil sample simulates scouring water flow in the barrel, adopts the image acquisition unit to record the scouring process, and is provided with the circulating filtering unit for filtering, so that the erosion rate scouring test device can be suitable for forming soil samples with wider particle size ranges, has wide application range, can avoid randomness of visual observation results, and has the advantages that the whole test only needs one-time water injection, and the test water consumption is small, thereby reducing the test cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a soil erosion rate washout test device according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a diagram showing a structure of a soil erosion rate washout test device according to an embodiment of the present invention in a detached state of a tub body;
fig. 4 is a schematic structural diagram of a lifting unit according to an embodiment of the invention;
FIG. 5 is a schematic view of a soil sample carrying unit according to an embodiment of the present invention;
reference numerals illustrate:
the device comprises a 1-frame, a 2-barrel body, a 3-rotating shaft, a 4-motor, a 5-observation window, a 6-lighting lamp ring, a 7-soil sample bearing unit, an 8-water storage tank, a 9-precipitation barrel, a 10-controller, an 11-impeller, a 12-fixing seat, a 13-rotating seat, a 14-hydraulic cylinder, a 15-guide rod, a 16-guide block, a 17-cantilever beam, a 18-shell, a 19-slide block, a 20-motor, a 21-speed reducer, a 22-grating counter and a 23-soil sample box.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment relates to a soil sample erosion rate scouring test device, which structurally comprises a control unit, a frame, a barrel body fixed on the frame, a water flow driving unit arranged on the frame for driving water bodies in the barrel body to flow, a soil sample bearing unit fixedly arranged for the barrel body for loading soil samples, a circulating filter unit for circulating and filtering the water bodies in the barrel body, and an image acquisition unit connected with the control unit for recording the scouring process of the soil samples at the soil sample bearing unit. As shown in fig. 1 to 3, the frame 1 is used as a supporting body of the whole device, and can be made of a prismatic steel plate with the thickness of 2cm, in order to ensure the level of the whole device, the four corners of the bottom of the frame 1 are provided with supporting feet with adjustable height, and meanwhile, the frame 1 is also provided with a level bubble so as to determine the level state of the device through the cooperation of the supporting feet and the supporting feet.
The barrel 2 is fixed on the top of the frame 1, in this embodiment, the barrel 2 is preferably a barrel, but may be of other shapes such as square or regular hexagon in cross section. Because the barrel body 2 is used as a water container and the water in the barrel body needs to flow, the barrel body 2 needs to have higher structural strength, and a stiffening hoop is also added in the middle part of the barrel body 2. The water flow driving unit in this embodiment specifically includes a rotating shaft 3 rotatably disposed on the frame 1, and a rotation driving portion fixed on the frame 1 and used for driving the rotating shaft 3 to rotate, where the rotation driving portion is a motor 4 installed on one side of the frame 1, the motor 4 can be connected with the bottom end of the rotating shaft 3 in a belt transmission manner, the top end of the rotating shaft 3 penetrates through the bottom of the barrel 2 and extends into the barrel 2, and an impeller 11 is installed at one end of the rotating shaft 3 extending into the barrel 2.
In this embodiment, the rotating shaft 3 needs to pass through the barrel body 2 from the bottom, so as to ensure the tightness of the barrel body 2, a sealing structure is also arranged between the rotating shaft 3 and the barrel body 2, and the sealing structure can adopt packing sealing or labyrinth sealing, etc. In order to simulate different water depths in the test, the impeller 11 may also be designed with a position adjustment along the axial direction of the shaft 3, which may be achieved in particular by using a set screw between the impeller 11 and the shaft 3 to slide the impeller 11 along the shaft 3 when the set screw is unscrewed. In addition, in this embodiment, the rotary shaft 3 is inserted into the tub 2 from the bottom, but the rotary shaft 3 may be inserted into the tub 2 from the top, which is inconvenient for adjusting the impeller 11 and operating at the soil sample carrying unit.
In this embodiment, the soil sample carrying unit 7 is disposed at the bottom of the barrel body 2, and based on the arrangement form of the rotating shaft 3 in fig. 1, the barrel body 2 in this embodiment is also designed into a structure with a detachable barrel wall and a detachable bottom, and a lifting unit capable of lifting and lowering the barrel wall in a detached state is also installed on the frame 1. Specifically, in order to ensure the tightness of the entire structure of the tub 2, a sealing member such as a rubber gasket should be provided between the tub wall and the bottom of the tub 2, and the tub wall and the bottom should be fastened by a bolt pair, so that the tub wall and the bottom can be reliably connected together. In order to facilitate the lifting operation of the barrel wall, the lifting unit can be in a hydraulic driving mode and adopts a cantilever structure.
Specifically, an exemplary structure of the hydraulic lifting unit is shown in fig. 4, which includes a fixed base 12 for fixed connection with the frame 1, a rotating base 13 provided on the fixed base 12, guide rods 15 fixed on top of the rotating base 13 and arranged side by side, guide shoes 16 slidably provided on the guide rods 15, and a hydraulic cylinder 14 mounted on the rotating base 13 for driving the guide shoes 16 to slide up and down along the guide rods 15. A cantilever beam 17 which is arranged vertically relative to the sliding direction of the guide block 16 is fixed on the guide block 16, a boom is arranged at the free end of the cantilever beam 17, and a clamping piece for clamping the barrel wall of the barrel body 2 is arranged on the boom. In this embodiment, by setting the rotary seat 13, the barrel wall can be translated to one side of the frame 1 after being lifted, so as to avoid inconvenience caused by the suspension of the barrel wall above the frame 1. Of course, instead of using the rotary base 13, the guide rod 15 may be directly fixed to the fixed base 12, and instead of being hydraulically lifted, it may be in the form of a screw, a linear motor, or the like.
In this embodiment, in order to facilitate recording of the image acquisition unit and observe the barrel body 2 on site, a transparent observation window 5 is also provided on the barrel wall of the barrel body 2, and the observation window 5 may be made of organic glass and is fixedly connected between the barrel body 2 and the barrel body 2 by glass cement and a bolt pair. In a specific arrangement, the observation windows 5 may be three of the annular barrels 2 uniformly arranged along the circumferential direction, and the three observation windows are also arranged near the bottom of the barrel wall corresponding to the positions of the soil sample bearing units 7, at this time, as shown in fig. 2, the soil sample bearing units 7 are also arranged near the barrel wall and at one of the observation windows 5, while the image acquisition units in the embodiment are arranged at the outer sides of the observation windows 5, so as to acquire images of the soil samples at the soil sample bearing units 7 through the observation windows 5.
In this embodiment, the image acquisition unit is specifically a camera fixed at the position of the external observation window 5 of the barrel body, and for facilitating image acquisition in the barrel body 2, an annular illumination portion is further provided at the center of the bottom of the barrel body 2, the illumination portion is specifically an illumination lamp ring 6 arranged around the rotating shaft 3, the illumination lamp ring 6 is designed into a waterproof structure, and emits illumination light in a radial manner, so that the brightness in the barrel body 2 can be ensured. However, due to the arrangement of the illuminating lamp ring 6, shaking stripes can be generated in the image when the common camera shoots, for this purpose, the camera used by the image acquisition unit in this embodiment selects the Logitech C920 high-definition camera, and the image shot by the Logitech C920 high-definition camera is transmitted to the control unit, and the image recorded by the camera is acquired in the control unit through Minivcap image acquisition software. In this embodiment, the control unit is specifically a controller 10 installed on one side of the rack 1, and it is specifically a PC.
In this embodiment, besides the camera is disposed in the barrel body 2, the camera can be disposed in the barrel body 2 through waterproof protection, and the camera can be disposed opposite to the soil sample bearing unit 5. An exemplary structure of the soil sample carrying unit 7 in this embodiment is shown in fig. 5, in which a soil sample chamber for loading soil samples, which is formed on the soil sample carrying unit 7 and has a top opening in the tub 2, is specifically made of a housing 18 fixedly connected to the bottom of the tub 2, and an ejector mechanism for ejecting the loaded soil samples from the tub 2 is provided at the bottom of the soil sample chamber. The ejection mechanism specifically comprises a sliding block 19 arranged at the bottom of the soil sample chamber, wherein the sliding block 19 can slide up and down along the depth direction of the soil sample chamber, a sealing structure such as a sealing ring is arranged between the sliding block 19 and a shell 18, and a linear driving part for driving the sliding block 19 to slide is also connected at the bottom of the sliding block 19 in a transmission manner.
In this embodiment, the linear driving portion is specifically a motor 20, an output end of the motor 20 is connected to a speed reducer 21, and an output end of the speed reducer 21 is connected to the slider 19 through a screw structure, so as to drive the slider 19. The motor 20 and the decelerator 21 can be fixed on the frame 1, and in order to realize accurate control of the sliding speed of the slide block 2, that is, the ejection speed of the loaded soil sample, the grating counter 22 is also used to detect the sliding displacement of the slide 19 in the embodiment, the structure and installation of the grating counter 22 can be referred to as the existing structure, and both the grating counter and the motor 20 are connected to the controller 10.
In this embodiment, the motor 20 is used to drive the soil sample to be ejected, so that the requirement of different ejection speeds of the soil sample can be met by utilizing the characteristic of wide adjustable range of the motor rotation speed, and the defect of the upper limit value of the speed existing in the existing piston ejection mode can be overcome. In order to facilitate loading of the soil sample, in this embodiment, a soil sample box 23 may be further installed in the soil sample chamber, and the soil sample box 23 is adapted to the soil sample chamber. In this embodiment, the circulating filter unit specifically includes a pipeline connected to the barrel 2 in a loop, and a pumping unit and a filtering unit disposed on the pipeline, where the pumping unit is used to circulate water flow, and the filtering unit filters and desandizes the circulating water flow.
In a specific structure, in this embodiment, a water storage tank 8 is disposed below the barrel body 2 on the frame 1, the water storage tank 8 is also connected in series to a pipeline, the pumping part is also a submersible pump disposed in the water storage tank 8, and the filtering part is a precipitation barrel 9 connected between the water storage tank 8 and the barrel body 2. In the operation of the device, water flow in the barrel body 2 firstly enters the sedimentation barrel 9 for sedimentation, then can enter the water storage tank 8 after being filtered, and returns to the barrel body 2 in the water storage tank 8 through the submersible pump. In order to avoid the influence of the water flow returned by the submersible pump on the water flow velocity in the barrel body 2, the water flow at the outlet of the submersible pump can enter the barrel body 2 in a top spraying mode.
In this embodiment, besides adopting the structural forms of the sedimentation tank 9, the water storage tank 8 and the submersible pump, the water flow circulation filtration can be achieved by directly connecting the centrifugal pump and the filter in series on the pipeline. When the soil sample erosion rate scouring test device of the embodiment is used for testing, firstly, a soil sample is placed in a soil sample box 23, after the barrel wall of a barrel body 2 is lifted, the soil sample box 23 is placed in a soil sample chamber of a soil sample bearing unit 7, after the barrel wall of the barrel body 2 is reset and water is injected, water is driven to flow through an impeller 11, so that water flows scour the soil sample at the bottom of the barrel body 2, ejection of the soil sample box 23 is controlled by a motor 20, and then the scouring height of the soil sample in unit time is measured through image acquisition, so that the scouring rate is obtained. Or in addition to measuring the scouring height of the soil sample per unit time, the present embodiment may also calculate the scouring rate by tiling the soil sample in a concave soil sample chamber and by measuring the mass change of the soil sample before and after.
In a specific test, the rotation speed of the impeller 11 is sequentially increased by the controller based on the starting flow speed, namely the flow speed of water when the sample starts to be flushed, so that the erosion rate of the soil sample under different rotation speeds of the impeller 11 is measured, and one rotation speed of the impeller corresponds to one experiment. The scouring rate under different flow rates is obtained, and the shearing stress of the water flow under the corresponding flow rates is combined, so that the scouring effect and the physical process of the scouring can be reflected more accurately and comprehensively.
The method comprises the steps of obtaining the shear stress of water flow, calibrating the flow speed of the water flow at different impeller rotating speeds through a flow velocity meter, and calculating the shear stress according to the measured flow speed by adopting a uniform flow basic mechanical equation recommended by the No. 18 announcement of the American hydraulic engineering. The uniform flow basic mechanical equation is:
In the equation, ρ -the density of water, v-the flow rate, λ -the along-path resistance coefficient, which can be determined from the Reynolds number Re and the relative roughness ε/d in the Modisco plot; wherein epsilon is the absolute roughness of the bottom surface of the instrument, which refers to the average height of the protrusion of the rough part, the absolute roughness in the literature generally takes the average particle size of a sample which is 0.5 to 0.7 times, and the absolute roughness is 0.6 of the average particle size of the sample under the assumption that half of particles protrude outwards in the test; d is the diameter of the round tube, and the non-circular section takes 4 times of the hydraulic radius R, namely the equivalent diameter.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The utility model provides a soil sample erosion rate washout test device, includes the control unit, its characterized in that still includes:
A frame;
The barrel body is fixed on the frame;
The device comprises a frame, a water flow driving unit, a soil sample bearing unit, a soil sample ejection mechanism and a water flow control unit, wherein the water flow driving unit is arranged on the frame and provided with a rotating shaft which is rotatably arranged on the frame and one end of which extends into the barrel body, and a rotating driving part which is arranged on the frame and is in transmission connection with the rotating shaft;
The circulating filter unit is connected with the barrel body in a loop, and is provided with a pipeline connected with the barrel body, and a pumping part and a filtering part which are connected in series on the pipeline;
the image acquisition unit is connected with the control unit and is arranged corresponding to the soil sample bearing unit so as to acquire images of soil samples loaded at the soil sample chamber;
The soil sample bears the unit and is located the bottom of staving, the staving of staving can dismantle the setting with the bottom, still includes:
The lifting unit is arranged on the frame and can be connected with the barrel wall of the barrel body so as to lift the barrel wall in a detached state;
The impeller may have a position adjustment along the axis of the shaft;
An annular illumination part which emits illumination light in a radial shape is arranged at the bottom of the barrel body and near the center of the barrel body;
The ejection mechanism comprises a sliding block which is arranged at the bottom of the soil sample chamber and can slide along the depth direction of the soil sample chamber, a linear driving part which is in transmission connection with the sliding block, and a detection part which detects the sliding displacement of the sliding block;
the linear driving part is a motor, and the detecting part adopts a grating counter.
2. The soil sample erosion rate washout test device according to claim 1, wherein:
at least one transparent observation window is arranged on the barrel wall of the barrel body, the soil sample bearing unit is close to the barrel wall and is arranged at one observation window, and the image acquisition unit is positioned outside the observation window corresponding to the soil sample bearing unit.
3. The soil sample erosion rate washout test device according to claim 1, wherein:
the image acquisition unit adopts a Logitech C920 high-definition camera.
4. The soil sample erosion rate washout test device according to claim 1, wherein:
The pipeline is connected with a water storage tank in series, the pumping part is positioned in the water storage tank, and the filtering part comprises a sedimentation barrel connected between the barrel body and the water storage tank.
5. The soil sample erosion rate washout test device according to any one of claims 1 to 4, wherein:
the stand is provided with a level bubble, and the bottom of the stand is provided with a supporting foot with adjustable height.
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| CN201710346844.5A CN107063855B (en) | 2017-05-16 | 2017-05-16 | Erosion rate scouring test device for soil sample |
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| CN201710346844.5A CN107063855B (en) | 2017-05-16 | 2017-05-16 | Erosion rate scouring test device for soil sample |
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| CN107063855B true CN107063855B (en) | 2024-05-28 |
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| CN108507893B (en) * | 2018-03-28 | 2021-04-27 | 长江大学 | Erosion device and sample erosion wear rate measuring apparatus |
| CN109612860B (en) * | 2018-10-19 | 2019-09-27 | 西安理工大学 | A kind of cylinder type washout test equipment |
| CN110631944B (en) * | 2019-09-27 | 2022-08-05 | 国家电网有限公司 | Underwater material scouring three-dimensional effect experimental device and method |
| CN110646309B (en) * | 2019-09-27 | 2022-07-15 | 国家电网有限公司 | Underwater material scouring plane effect experiment device and method |
| CN110836846B (en) * | 2019-11-28 | 2022-03-01 | 重庆交通大学 | Spray test method and system for indoor simulation of ocean splash zone environment |
| CN114136824B (en) * | 2021-10-28 | 2022-07-05 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil erosion test device and method |
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