CN106969992B - Test instrument for simulating solid medium degradation damage under flowing water effect - Google Patents

Abstract

The invention discloses a test instrument for simulating the deterioration and destruction of a solid medium under the action of running water, the purpose of which is to reflect the damage process and law of the soil body under the action of flowing water erosion, improve test efficiency, reduce test cost, and enhance test controllability. The technical solution adopted is: a sample chamber with an opening at the top, the sample chamber includes a circulation passage, the circulation passage is a circular passage, the circulation passage is filled with fluid, and a sample holder for placing the sample is arranged in the circulation passage. The circulation path is also provided with a propeller for controlling the fluid flow rate, the propeller is driven by a motor, the sample holder is provided with a tension sensor for detecting the quality change of the sample, the tension sensor is connected to the computer, and the circulation path is provided with A flow rate sensor, the flow rate sensor is connected to the computer.

Description

A test instrument for simulating the deterioration and destruction of solid medium under the action of flowing water

technical field

The invention relates to the fields of environmental engineering and soil mechanics, in particular to a test instrument for simulating the deterioration and destruction of solid media under the action of running water.

Background technique

In actual engineering, the soil is scoured by groundwater or natural precipitation runoff. In addition, there is a problem of soil erosion and loss in the middle bank slope of the river. After the soil is saturated with water, the strength of the soil itself will be greatly reduced and broken. On the other hand, the microstructure of the soil is destroyed, the particles disintegrate and fall off, and the macroscopic manifestations are a large amount of water and soil loss or the reduction of cultivated land, which poses a serious threat to engineering safety and agricultural production. The current tests for testing the water stability of soil are generally relatively rough, and they are all carried out in still water. There is no relatively simple technology and equipment for soil degradation and damage detection under dynamic water conditions. Therefore, it is necessary to invent a test device with a small footprint and strong test controllability, which can effectively reflect the process and law of deformation of soil or other solid-phase media under the condition of dynamic water erosion. On the one hand, it saves manpower, material and financial resources.

Contents of the invention

In order to solve the problems in the prior art, the present invention proposes a simple structure, flexible operation, which can effectively and real-time reflect the damage process and law of the soil under the action of dynamic water erosion, which can improve the test efficiency and reduce the test cost. It is a test instrument for simulating the deterioration and destruction of solid medium under the action of flowing water to enhance the controllability of the test.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a sample chamber with an opening at the top, the sample chamber includes a circulation path, the circulation path is filled with fluid, and a sample holder for placing the sample is arranged in the circulation path A propeller for controlling the fluid flow rate is also arranged in the circulation passage, and the propeller is driven by a motor. The sample holder is provided with a tension sensor for detecting the change of the sample quality, and the tension sensor is connected to the computer.

The circulation passage is an annular passage.

The center of the annular passage is a cavity, and the motor is arranged in the cavity.

A base is arranged in the cavity, and a fixing bracket is arranged on the base, and the fixing bracket extends out of the sample chamber and is fixedly connected with the sample fixing frame.

The base is a solid counterweight with a circular or rectangular cross section.

A flow rate sensor is arranged on the circulation path, and the flow rate sensor is connected to a computer.

The flow rate sensor is arranged on the circulation path close to the sample holder.

The motor is a speed-regulating motor, and the control end of the motor is connected to a computer.

The sample chamber is cylindrical and made of transparent tempered glass or plexiglass.

The sample fixing frame includes a fixing rod and a fixing plate arranged at the bottom of the fixing rod.

Compared with the prior art, the present invention sets a circulation path in the sample chamber, fills the circulation path with fluid, uses the propeller to stir the fluid to make the fluid flow at different flow rates, and performs dynamic water erosion on the sample fixed on the sample holder. And use the tension sensor to detect the quality change of the sample, and achieve the purpose of controlling the flow rate by controlling the motor speed, thereby simulating the test of the deterioration and destruction of the solid medium under the action of flowing water. The corrosion monitoring test can effectively improve the test efficiency, enhance the controllability of the test, and achieve the purpose of saving resources. In addition, the principle of the invention is simple and easy to understand, the operation is convenient and safe, and has good use and popularization value.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of sample room;

Among them, 1-motor, 2-sample chamber, 3-fixed bracket, 4-tension sensor, 5-data connection line, 6-computer, 7-sample fixing frame, 8-circulation channel, 9-base, 10- Cavity, 11-propeller, 12-flow rate sensor.

Detailed ways

The present invention will be further explained below in conjunction with specific embodiments and accompanying drawings.

Referring to Fig. 1, the present invention includes a sample chamber 2 with an opening at the top. The sample chamber 2 is cylindrical and made of transparent tempered glass or plexiglass. Referring to Fig. 2, the sample chamber 2 includes a circulation path 8, and the circulation path 8 is An annular passage, the center of the annular passage is a cavity 10, the circulation passage 8 is filled with fluid, the circulation passage 8 is provided with a sample holder 7 for placing the sample, the sample holder 7 includes a fixed rod and is arranged on a fixed Fixed plate at the bottom of the rod. The circulation path 8 is also provided with a propeller 11 for controlling the fluid velocity, the propeller 11 is driven by the motor 1, the motor 1 is arranged in the cavity 10, the cavity 10 is provided with a base 9, the base is provided with a fixed bracket 3, and the fixed bracket 3 extends out of the sample chamber 2 and is fixedly connected with the sample holder 7, and the base 9 is a solid counterweight with a circular or rectangular cross-section. The sample fixing frame 7 is provided with a tension sensor 4 for detecting the quality change of the sample, and the tension sensor 4 is connected to the computer 6 through a data connection line 5 . The circulation channel 8 is provided with a flow rate sensor 12 , which is connected to the computer 6 through the data connection line 5 , and the flow rate sensor 12 is provided on the circulation channel 8 close to the sample holder 7 . The motor 1 is a speed-regulating motor, and the control terminal of the motor 1 is connected to a computer 6 through a data connection line 5 .

The present invention includes a fixed bracket 3 , a tension sensor 4 , a sample fixing frame 7 , a base 9 , a sample chamber 2 , a propeller 11 , a motor 1 , a flow rate sensor 12 , a circulation path 8 , and a computer 6 . The sample chamber 2 is cylindrical and made of transparent tempered glass or plexiglass, so as to ensure that the change of the sample can be observed during the test; the fixed bracket 3 is made of steel material, which has good stability. In the case of external force and temperature change, no deformation occurs, and a solid steel base 9 is set at the bottom to maintain overall stability; the base 9 is set at the bottom of the fixed bracket 3, which can be made into a circular or rectangular shape, and the whole should not be too large so as to facilitate Placed, and the material is solid steel, does not move during the test process, ensuring the overall stability during the test; the tension sensor 4 is arranged between the fixed bracket 3 and the sample holder 7, and is used to monitor the solid sample Real-time change data under dynamic water erosion; the sample holder 7 is located on the side of the fixed holder 3, and is equipped with a tension sensor 4, and the sample holder 7 extends into the test area of the circulation channel 8, and various shapes can be placed and fixed The original or remodeled soil sample; the circulation passage 8 is a circular loop formed end to end, with an open structure, and the center of the circulation passage 8 is hollow, which is used to place the fixed support 3 and its base 9; the propeller 11 is arranged in the circulation passage 8 side, after the motor 1 is energized, it can rotate, and is used to stimulate the fluid flow in the circulation passage 8, and can adjust the flow rate of the simulated flowing water in the circulation passage 8; the motor 1 is connected to the propeller 11 to provide power for the propeller, and the motor 1 is a speed-regulating motor , the control end is connected with the computer, and can be controlled by the computer, and its speed can be changed in real time so as to change the water flow velocity in the circulation path 8, so as to simulate different runoff conditions; the flow velocity sensor 12 is placed near the front of the sample holder 7, and connected The computer 6 is connected to measure the actual flow velocity and transmit the data to the computer 6; the test area is the area where the circulation path 8 is eroded, and the sample fixing frame 7 fixes the sample in this area, thereby performing dynamic water erosion; the computer uses To collect the data collected by the tension sensor 4 and the flow rate sensor 12, and adjust the motor 1 to control the speed of the propeller 11.

The invention fills the circulation channel with fluid, uses the propeller to stir the fluid to make the fluid flow at different flow rates, performs dynamic water erosion on the sample fixed on the sample holder, and uses the tension sensor to detect the change of the sample quality, and controls the motor speed The purpose of controlling the flow rate is achieved, thereby simulating the test of the deterioration and destruction of the solid medium under the action of flowing water.

The invention simulates the test of the deterioration and destruction of solid medium under the action of flowing water, and can be used conveniently and flexibly in the process of monitoring test of dynamic water erosion of soil and other solid medium materials, can effectively improve the test efficiency, and enhance the controllability of the test and achieve the purpose of saving resources. In addition, the principle of the invention is simple and easy to understand, the operation is convenient and safe, and has good use and popularization value.

Claims (8)

1. The utility model provides a test instrument that simulation flowing water effect is down solid medium degradation destruction, its characterized in that, including open-top's sample room (2), sample room (2) are including circulation route (8), and circulation route (8) are the annular passage, and circulation route (8) are filled with the fluid, are provided with sample mount (7) that are used for placing the sample in circulation route (8), still are provided with screw (11) that are used for controlling the fluid flow rate in circulation route (8), and screw (11) are through motor (1) drive, be provided with on sample mount (7) and be used for detecting tensile force sensor (4) of sample quality change, tensile force sensor (4) are connected to computer (6), be provided with flow rate sensor (12) on circulation route (8), flow rate sensor (12) are connected to computer (6).

2. A test instrument for simulating the degradation and destruction of solid media under the action of running water as claimed in claim 1, wherein the center of the annular passage is a cavity (10), and the motor (1) is arranged in the cavity (10).

3. A test instrument for simulating the deterioration and destruction of solid media under the action of flowing water as claimed in claim 2, wherein a base (9) is arranged in the cavity (10), and a fixing support (3) is arranged on the base, and the fixing support (3) extends out of the sample chamber (2) and is fixedly connected with the sample fixing frame (7).

4. A test instrument for simulating the deterioration and destruction of solid media under the action of flowing water as claimed in claim 3, wherein the base (9) is a solid counterweight with a circular or rectangular cross section.

5. A test instrument for simulating the deterioration and destruction of solid media under running water according to claim 1, wherein the flow rate sensor (12) is disposed on the circulation path (8) adjacent to the sample holder (7).

6. A test instrument for simulating the degradation and damage of solid media under the action of running water as claimed in claim 1, wherein the motor (1) is a speed-adjustable motor, and the control end of the motor (1) is connected to the computer (6).

7. The test instrument for simulating the degradation and destruction of solid media under the action of running water as claimed in claim 1, wherein the sample chamber (2) is cylindrical and made of transparent tempered glass or organic glass.

8. A test instrument for simulating the deterioration and destruction of solid media under running water as claimed in claim 1, wherein the sample holder (7) comprises a fixing rod and a fixing plate disposed at the bottom of the fixing rod.

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