Method and device for achieving analog-matching runoff with stable flow and sand content

A technology of stable flow and realization method, which is applied in the field of realization of the planned runoff with stable flow and sediment concentration, and can solve the problems of popularization and application of soil erosion tests, uneven mixing of water and sand in the proposed runoff, unstable runoff sediment concentration, etc. problem, to achieve the effect of eliminating sand deposits, overcoming sediment deposits, and ensuring scientificity and accuracy

Inactive Publication Date: 2017-05-24
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing test device technology, the water-sand mixing and distribution device has defects such as sedimentation at the bottom, uneven water-sand mixing in the planned runoff, and unstable runoff sediment concentration. , if the publication number is CN 203630133 U and other patent documents, it is proposed to weld the water tank and the steady flow pool at the top of the scour tank
However, this type of technology can only be used for clean water scouring tests, and there are no reports of water-sand mixing devices for soil erosion tests. Due to various constraints such as cost, structure, land occupation and differences in national conditions, it is still difficult to popularize and apply it in domestic soil erosion tests

Method used

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  • Method and device for achieving analog-matching runoff with stable flow and sand content
  • Method and device for achieving analog-matching runoff with stable flow and sand content
  • Method and device for achieving analog-matching runoff with stable flow and sand content

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Embodiment 1

[0039] This embodiment provides a water and sand uniform mixing flow distribution device suitable for soil erosion tests, such as figure 1 As shown, it includes a tank body 1, a stirring shaft 2, a head control valve 3 and an outflow gate valve 4; the top 11 of the tank body 1 is provided with an opening; the stirring shaft 2 is arranged at the central position of the tank body 1, and it is from The top 11 of the tank body 1 penetrates to the bottom 12 of the tank body 1 and is fixedly connected with the top 11 and the bottom 12 of the tank body 1 respectively. The impeller 5 is arranged on the stirring shaft 2; the water head control valve 3 and the outflow gate valve 4 They are respectively arranged at the upper middle position and the bottom end position of the outer wall of the tank body 1; the bottom baffle plate 6 is arranged on the bottom inner wall of the tank body 1.

[0040] The tank body 1 in this embodiment is a cylindrical tank body. The use of a cylindrical tank...

Embodiment 2

[0051] Embodiment 2 Test method of the present invention

[0052] The device is designed with reference to the design idea of ​​Embodiment 1 of the present invention. For the convenience of description, this embodiment is described with the following dimensional data.

[0053] 1) getting the device tank body diameter T of the present invention's design is 1.2m, and height h is 1.1m, and material is stainless steel;

[0054] 2) impeller diameter D=0.5T=0.55m, impeller installation height C=0.22m, operating liquid level H=0.6T=0.66m;

[0055] 3) A 50mm water head control ball valve is installed at the operating liquid level, and a 75mm die-casting copper alloy gate valve is connected at the bottom;

[0056] 4) Four stainless steel bottom baffles are welded to the bottom of the device symmetrically in a cross shape, and the specifications are all 0.10m×0.06m;

[0057] 5) According to the parameters of the stirred sediment particles, take the blade inclination angle as 25°, and...

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Abstract

The invention discloses a method and a device for achieving analog-matching runoff with stable flow and sand content. The method comprises the following steps: mixing water and sand in a cylindrical tank, stirring the obtained mixture so as to form runoff which is conveyed up and down around an axial direction and the circumference, and discharging the runoff as analog-matching runoff for soil erosion indoor analog and outdoor testing, wherein the sand content of the runoff is 1-5%, and the flow of the runoff is 2.5-100kg / minute. Based on the method disclosed by the invention, as the water and the sand of a certain ratio are mixed and conveyed up and down around the axial direction and the circumference, the phenomenon that sand is accumulated at the bottom of the device can be effectively eliminated, sand granules can be uniformly distributed in fluid, and thus a water-sand uniform mixed suspension system can be formed. The invention further provides a device for achieving the method. The device is simple and compact in structure and simple to operate, and as a water head control valve and a gate valve are adopted to discharge the runoff, continuous flow supply with stable runoff flow and sand content can be ensured, and errors of erosion test data can be reduced.

Description

technical field [0001] The invention relates to the technical field of soil erosion and water and soil conservation, and more specifically, to a method and device for realizing a planned runoff with stable flow and sand concentration. Background technique [0002] my country is facing a serious problem of soil erosion. In the study of water and soil loss law and soil erosion, runoff erosion test is a common and important research method, which is used to study soil anti-scourability coefficient, soil separation rate under runoff erosion, etc., and to explore soil resistance to runoff hydraulic damage and transport. Sediment capacity. Generally, whether it is an indoor simulated slope scour test, an undisturbed soil scour tank test, or a field scour method, etc., the flow supply device needs to provide continuous and stable runoff with a specific flow rate and sediment concentration. The most ideal flow distribution method for this type of device is to mix a certain proport...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 梁志权卓慕宁李定强谢真越张思毅
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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