CN102590048B - Device for uniformly stirring soil particle suspension for particle analysis experiment by densimeter method - Google Patents

Abstract

The invention discloses a device for uniformly stirring soil particle suspension by density meter method in particle analysis experiment, which comprises a casing, an air pump, a stirring rod, a temperature display, a temperature sensor and a timer, wherein the air pump is arranged in the casing, and the temperature display and a timer are arranged on the casing, the stirring rod is connected with the air pump, and the temperature sensor is connected with the temperature display circuit. The invention solves the deficiency of the manual stirring of the stirrer in previous tests. The rise of the electronically controlled air bubbles drives the movement of the suspension so that the soil particles in the suspension can be more fully and evenly distributed. The control of the amount of air bubbles can effectively prevent the overflow of the suspension during stirring, and the electronic measurement of time can reduce the error in manual measurement. The addition of the temperature sensor can make the measurement of the suspension temperature more accurate and convenient. Compared with the previous studies, the operation of the device is simpler and more convenient, the experimental efficiency is improved, and it is more practical.

Description

Apparatus for mixing uniform soil particle suspension by densitometer method in particle analysis experiment

technical field

The invention relates to a device for uniformly stirring soil particle suspension by a densitometer method in a particle analysis experiment.

Background technique

The particle analysis experiment is an experimental method for determining the percentage of the total mass of various particle groups in the soil. It can be divided into sieve analysis method and sedimentation analysis method. The sedimentation analysis method is further divided into density meter method and pipette method. For soil particles with a particle size of less than 0.075 mm, sedimentation analysis is required for determination.

With the continuous development of underground space engineering, the research on rock and soil has become more and more common. In the aspect of soil research, soil particle composition, particle size gradation and other indicators have become the direction that people pay close attention to. Therefore, the particle analysis experiment It is also gradually expanding in various places.

The particle composition of soil reflects certain properties of soil to a certain extent, so soils are often classified according to particle composition in engineering. Coarse-grained soil is mainly classified according to particle composition, while fine-grained soil is due to mineral composition, particle shape and Factors such as colloid content cannot be classified by particle composition alone, but by means of plasticity diagram or plasticity index.

When soil particles sink by their own weight in a liquid, larger particles sink faster and smaller particles sink more slowly. The density meter method is a kind of sedimentation analysis method, which is only suitable for samples with a particle size of less than 0.075mm. The density meter method is to put a certain amount of soil sample (particle size less than 0.075mm) in a measuring cylinder, then add pure water, and stir to make the particles of the size shown in the picture evenly distributed in the water to make a certain amount of uniform concentration of soil suspension. solution (1000mL). Static suspension, let the soil particles settle, during the sinking process of the soil particles, use a density meter to measure the different suspension densities corresponding to different times in the suspension, according to the density meter readings and the sinking time of the soil particles, you can Calculate the percentage of particles with a particle size smaller than a certain particle size in the soil sample.

At present, the process of particle analysis experiments is basically mature, but in the production of uniform soil suspension, the stirring tools used in the stirring process of the suspension are inconvenient, and the collision between the metal stirring head and the measuring cylinder can easily cause damage to the device , the up and down stirring of the agitator is difficult to ensure the uniformity of the soil suspension. Once the stirring head is raised too high, it will cause inaccurate test data when it is higher than the liquid level, and it is difficult to meet the needs of efficient completion of the entire particle analysis experiment.

Contents of the invention

Aiming at the above-mentioned prior art, the present invention provides a device for stirring uniform soil particle suspension by densitometer method in particle analysis experiment, which is simple in operation, efficient and convenient.

The present invention is achieved through the following technical solutions:

A device for uniformly stirring soil particle suspension by the density meter method in particle analysis experiments, including a casing, an air pump, a stirring rod, a temperature display, a temperature sensor and a timer, wherein the air pump is arranged in the casing, and the temperature display and the timer are both It is arranged on the shell, the stirring rod is connected with the air pump, and the temperature sensor is connected with the temperature display circuit.

The device for uniformly stirring the soil particle suspension by the density meter method in the particle analysis experiment also includes a power cord, which is respectively connected with an air pump, a temperature display, a temperature sensor and a timer, and a master control switch is arranged on the power cord.

The air pump is provided with an air pump switch and a flow regulating button, and the air pump switch and the flow regulating button are located on the casing.

The temperature display is provided with a control switch and a temperature recording switch, and the control switch and the temperature recording switch are located on the shell.

The structure of the stirring rod is: comprising a glass tube, a conduit and a rubber sleeve, wherein one end of the glass tube is covered with a rubber sleeve, the other end is connected with a conduit, and the conduit communicates with an air pump. When working, use a glass rod to stir the suspension, and use the air pump to make the air flow along the tube and overflow from the rubber sleeve to promote the stirring of the suspension and make the stirring more efficient and uniform.

The temperature sensor is an electronic temperature sensor.

The timer is an electronic timer.

When using, the operation steps are as follows:

A. Pour the treated soil suspension in the particle analysis experiment into the measuring cylinder, arrange the device of the present invention, switch on the power supply, extend the stirring rod with the rubber sleeve into the bottom of the suspension, turn on the air pump, and after adjustment To achieve the best ventilation, stir the suspension properly with a stirring rod for about 1min until the suspension particles are evenly distributed, slowly take out the stirring rod, and turn off the air pump after it is completely taken out.

B. After the stirring is completed, put the density meter into the suspension, start the timer immediately, and record the readings of the density meter at 0.5, 1, 2, 5, 15, 30, 60, 120 and 1440 minutes.

C. After each reading, take out the density meter and put it into a measuring cylinder filled with pure water, and put the temperature sensor into the suspension, read the temperature display on the electronic screen through the temperature display and make a record, and then complete the subsequent correlation experiment.

In the present invention, the temperature display is connected to the temperature sensor through a wire. In the test, the temperature sensor is put into the suspension so that the temperature of the suspension can be accurately measured, and it is clearly displayed on the screen of the temperature display, which avoids the distortion of the meniscus when reading with the naked eye. Influence and error; the timer of the present invention is used for time statistics when the suspension density change is measured in the test.

The invention solves the deficiency of the manual stirring of the stirrer in previous tests. The rise of the electronically controlled air bubbles drives the movement of the suspension so that the soil particles in the suspension can be more fully and evenly distributed. The control of the amount of air bubbles can effectively prevent the suspension from overflowing during stirring, and the electronic measurement of time can reduce the error in manual measurement. The addition of the temperature sensor can make the measurement of the suspension temperature more accurate and convenient. Compared with the previous studies, the operation of the device is simpler and more convenient, the experimental efficiency is improved, and it is more practical. Compared with existing measurement methods, the present invention has the following advantages:

1. Reduce the errors caused by traditional thermometers used to measure the temperature of the suspension in the past, such as errors such as the thermometer touching the side wall of the measuring cylinder, and the line of sight is not horizontal when reading.

2. The operation of time measurement is optimized, electronic timing is convenient and accurate, and the influence of human operation on time measurement is reduced.

3. It solves the inconvenience of the stirring tools used in the previous particle analysis experiment during the stirring process of the suspension, such as the collision between the metal stirring head and the measuring cylinder, which can easily cause damage to the device, and the up and down stirring of the stirrer is difficult to ensure the suspension of the soil. The uniformity of the liquid, once the stirring head is raised too high, it will cause inaccurate test data when it is higher than the liquid level.

4. In the present invention, temperature measurement, time measurement and suspension stirring are carried out in the same device, which is efficient and convenient, especially in a large number of measurement tests, which can reflect the practical value of the device.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Among them, 1. Master control switch; 2. Power cord; 3. Air pump switch; 4. Flow adjustment button; 5. Temperature display; 6. Timer; 7. Control switch; 8. Temperature recording switch; 9. Temperature sensor; 10. Stirring rod.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

A kind of device that is used for particle analysis experiment densitometer method to stir uniform soil particle suspension, comprises housing, air pump, stirring rod 10, temperature indicator 5, temperature sensor 9 and timer 6, as shown in Figure 1, wherein, air pump design In the casing, the temperature display 5 and the timer 6 are both arranged on the casing, the stirring rod 10 is connected with the air pump, and the temperature sensor 9 is connected with the temperature display 5 circuit. Also includes a power cord 2, the power cord 2 is respectively connected with the air pump, the temperature display 5, the temperature sensor 9 and the timer 6, and the power cord 2 is provided with a master control switch 1.

The air pump is provided with an air pump switch 3 and a flow adjustment button 4, and the air pump switch 3 and the flow adjustment button 4 are located on the casing.

The temperature display 5 is provided with a control switch 7 and a temperature recording switch 8, and the control switch 7 and the temperature recording switch 8 are located on the casing.

The structure of the stirring rod 10 is: comprising a glass tube, a conduit and a rubber sleeve, wherein one end of the glass tube is covered with a rubber sleeve, the other end is connected with a conduit, and the conduit communicates with an air pump. When working, use a glass rod to stir the suspension, and use the air pump to make the air flow along the tube and overflow from the rubber sleeve to promote the stirring of the suspension and make the stirring more efficient and uniform.

The temperature sensor 9 is an electronic temperature sensor.

The timer 6 is an electronic timer.

When using, the operation steps are as follows:

A. Pour the treated soil suspension in the particle analysis experiment into the measuring cylinder, arrange the device of the present invention, switch on the power supply, extend the stirring rod 10 with the rubber sleeve into the bottom of the suspension, open the air pump, and adjust Afterwards, the optimal ventilation rate is reached, and the suspension is properly stirred with the stirring rod 10 for about 1 min until the particles of the suspension are evenly distributed, then the stirring rod 10 is slowly taken out, and the air pump is turned off after being completely taken out.

B. After the stirring is completed, put the density meter into the suspension, start the timer 6 immediately, and record the readings of the density meter at 0.5, 1, 2, 5, 15, 30, 60, 120 and 1440 minutes.

C. After each reading, take out the density meter and put it into a measuring cylinder filled with pure water, put the temperature sensor 9 into the suspension, press the temperature recording switch 8, read the temperature display on the electronic screen through the temperature display 5 and Make a good record, and then complete the related experiments later.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (1)

1. one kind for the stir device of grogs suspension of grain size analysis experiment densimeter method, it is characterized in that: comprise shell, air pump, stirring rod, temperature indicator, temperature sensor and timer, wherein, air pump is established in the enclosure, temperature indicator and timer all are located on shell, stirring rod is connected with air pump, and temperature sensor is connected with the temperature indicator circuit;

Also comprise power lead, power lead is connected with air pump, temperature indicator, temperature sensor and timer respectively, and power lead is provided with total control switch;

Described air pump is provided with air pump switch and adjust flux button, and air pump switch and adjust flux button are positioned on shell;

Described temperature indicator is provided with gauge tap and thermograph switch, and gauge tap and thermograph switch are positioned on shell;

The structure of described stirring rod is: comprise glass tube, conduit and rubber sleeve, wherein, and an end cover rubber sleeve of glass tube, the other end is connected with conduit, and conduit is communicated with air pump.

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