CN209810199U

CN209810199U - Simple constant temperature and humidity box for soil shrinkage experiment

Info

Publication number: CN209810199U
Application number: CN201920372647.5U
Authority: CN
Inventors: 江明; 王世梅
Original assignee: China Three Gorges University CTGU
Current assignee: China Three Gorges University CTGU
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2019-12-20
Anticipated expiration: 2029-03-22

Abstract

A simple constant temperature and humidity box for soil shrinkage experiments comprises a box body, wherein a box door is arranged on the box body; the left and right sides is equipped with the piece that generates heat in the box, and the upper and lower end is equipped with first fan, second fan respectively in the box, and saturated saline solution holds the container in the bottom place in the box, and first interlayer frame, second interlayer frame are installed from up down in proper order on the box that saturated saline solution held the container top, and wherein place the balance that is equipped with the sample on the first interlayer frame, the camera that corresponds with sample quantity, position is installed to second interlayer frame below correspondence. The utility model provides a pair of simple and easy constant temperature and humidity case that can supply soil body shrink experiments to use can improve test efficiency.

Description

Simple constant temperature and humidity box for soil shrinkage experiment

Technical Field

The utility model relates to a constant temperature and humidity case, especially a constant temperature and humidity case that can supply soil body shrink experiment usefulness.

Background

When soil body shrinkage experiments are carried out, the stability of the experiment environment needs to be ensured, and therefore the temperature and the humidity of the experiment environment need to be controlled. The constant temperature and humidity box commonly used in the laboratory at present has high cost, small volume and more complex temperature and humidity control system, and can not operate the sample and have no image recording function in the experimental process.

Disclosure of Invention

The utility model aims to solve the technical problem that a constant temperature and humidity case that can supply soil body shrink experiments usefulness is provided, can carry out simple and easy accuse temperature accuse humidity, carries out the state record to soil sample simultaneously.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a simple constant temperature and humidity box for soil shrinkage experiments comprises a box body, wherein a box door is arranged on the box body; the left and right sides is equipped with the piece that generates heat in the box, and the upper and lower end is equipped with first fan, second fan respectively in the box, and saturated saline solution holds the container in the bottom place in the box, and first interlayer frame, second interlayer frame are installed from up down in proper order on the box that saturated saline solution held the container top, and wherein place the balance that is equipped with the sample on the first interlayer frame, the camera that corresponds with sample quantity, position is installed to second interlayer frame below correspondence.

A temperature and humidity sensor is arranged in the box body and connected with the data acquisition module.

The second interlayer frame is in a grid shape.

The box door is provided with a round hole which is in sealing connection with the transparent long rubber glove.

The outer upper end circumference of box all is equipped with the couple, and the heat preservation is cotton through the couple setting at the left surface of box, right flank, trailing flank and top face.

The utility model relates to a can supply constant temperature and humidity case that soil body shrink experiments were used, generate heat piece, saturated salt solution through the setting and hold the container, utilize the fan to carry out the air current circulation, adjust inside temperature, humidity to through the monitoring of warm and humid acidimeter, control inside temperature, humidity and maintain in the certain limit. In addition, the change of the soil sample area, the quality and the like can be obtained by real-time shooting through the camera and post-processing.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a left side view of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is a top view of the first shelf of the present invention.

Fig. 6 is a top view of the second shelf of the present invention.

Fig. 7 is the installation schematic diagram of the middle camera of the present invention.

Fig. 8 is a schematic view of the arrangement of the middle heat-insulating cotton of the present invention.

Fig. 9 is a block diagram illustrating the medium temperature and humidity control principle of the present invention.

Fig. 10 is a diagram of the position relationship between the middle camera and the sample according to the present invention.

In the figure: the box 1, first fan 2, the piece 3 that generates heat, saturated salt solution hold container 4, round hole 5, first interlayer frame 6, second interlayer frame 7, LED lamp strip 8, couple 9, second fan 10, chamber door 11, camera 12, gyro wheel 13, hygrothermograph 14, heat preservation cotton 15, soil sample 16.

Detailed Description

As shown in fig. 1-10, a constant temperature and humidity box for soil shrinkage experiments comprises a box body 1, wherein a transparent box door 11 is arranged on the box body 1. In order to realize constant temperature and constant humidity, the left and the right of the box body 1 are provided with heating sheets 4, and the heating sheets 4 are connected with an external power supply and control the heating time through a controller. The side wall of the box body 1 is provided with a first fan 2 at the lower end of the heating sheet 4, a second fan 10 is fixed at the top end of the box body 1, and the power of the first fan 2 is less than that of the second fan 10. In addition, a saturated saline solution containing container 4 is arranged at the bottom of the box body 1, the saturated saline solution containing container 4 is mainly used for providing enough moisture, and the humidity in the box is controlled by utilizing a steam balance method. Can enough play through the effect of first fan 2, second fan 10 and evenly be full of whole box 1 with the heat of piece that generates heat, simultaneously, also can make the air humidity around, reach suitable humiture. In addition, when the temperature and the humidity are high, certain air cooling and air drying can be carried out, and rapid cooling and dehumidification can be carried out. The temperature and humidity control is monitored by a temperature and humidity sensor 14 (a temperature and humidity sensor of SCTHWA43SDS type). The temperature and humidity sensor 14 is connected with a data acquisition module (adopting an ARM32 singlechip processor).

In addition, a first interlayer frame 6 and a second interlayer frame 7 are sequentially arranged on the box body 1 above the saturated saline solution containing container 4 from bottom to top. Wherein, the first interlayer frame 6 and the second interlayer frame 7 are net frames. Wherein, a plurality of electronic balances 18 can be simultaneously placed on the first interlayer frame 6, and then the sample 16 is correspondingly placed on the electronic balances, and the electronic balances are used for recording the mass change of the sample. The lower end of the second interlayer frame 7 is provided with a plurality of cameras 12 (the model of the camera is CGE-VRT-A3), and the number and the positions of the cameras 12 correspond to the samples. The camera 12 is connected with a computer through a data line and is used for recording the surface area and the surface crack change condition of the cutting ring soil sample.

The operation method comprises the following steps:

step 1: before the test is started, the diameter D1 of the test soil sample is measured, and the initial cross-sectional area S of the test soil sample can be determined₁And placing the test soil sample into a constant temperature and humidity box. The camera 12 determines the focal length f and the object distance u according to the diameter D1 of the test soil sample, so that the test soil sample can completely and clearly appear in the shooting center.

Step 2: the test and the photographing were started, and a photographing interval of 5 seconds was set.

And step 3: and after the test is finished, taking out the soil sample, importing the obtained picture into image processing software, processing the image by the image processing software, analyzing the image to obtain a deformed boundary of the test soil sample, and obtaining pixels corresponding to the cross section diameter of the test soil sample. In the shot photo: the cross section diameter of the original soil sample is D2'; the cross section diameter of the deformed test soil sample is D3, and the D2 calculation formula in the picture is as follows:where the diameter pixel is a and the number of dots per inch of image DPI is b.

Similarly, the size of D3 after deformation in the photograph can also be obtained.

And 4, step 4: and (3) calculating to obtain the actual diameter D of the deformed soil sample, wherein according to the theorem of similarity ratio, the calculation formula is as follows:

the camera 12 employs: the cossim model: XFACAM 1080PHD manufacturing enterprise: beijing century Kexin scientific instruments Co.

In addition, the bottom of the box body 1 is provided with a roller 13 with a brake, the roller 13 is convenient for the box body to move, and after the box body is positioned, a brake pad is put down to ensure the stability of the box body.

In addition, a round hole 5 is arranged on the box door 11, and the round hole 5 is connected with the transparent long rubber glove in a sealing way. The accessible rubber gloves operate the sample in the experimentation, avoid making the incasement environment change because of opening the chamber door.

In addition, an LED lamp strip 8 is also arranged on the upper portion of the interlayer frame 7 in the circumferential direction, and the LED lamp strip can be used for manufacturing a shadowless environment. The camera is convenient to capture the real high-definition state of the sample.

In addition, a sealing ring is arranged between the box door 11 and a door seam, so that heat dissipation is reduced, and the stability of the environment in the box is improved.

In addition, the outer upper end of the box body 1 is circumferentially provided with hooks 9, and the heat preservation cotton 15 is arranged on the left side surface, the right side surface, the rear side surface and the top end surface of the box body 1 through the hooks 9. This reduces the influence of the temperature inside the tank from the temperature outside the tank.

The working principle and the process are as follows:

firstly, the diameter of a test soil sample is measured, the cross-sectional area of the test soil sample can be calculated, then an electronic balance is placed on a first interlayer frame 6, the test soil sample is placed on the electronic balance, and a camera is placed right above the center of the test soil sample and fixed on a second interlayer frame 7. And opening the camera and adjusting the camera to the proper position. Pouring the prepared saturated salt solution into the saturated salt solution container 4, closing the box door 11, and applying heat preservation cotton on the periphery of the box body and the top cover of the box. After all the parts are adjusted in place, the related power supplies are started, the first fan 2, the second fan 10 and the heating sheets start to work, and the air circulation in the constant temperature and humidity box is realized. The temperature and humidity regulation in the constant temperature and humidity box is realized by acquiring data through a temperature and humidity sensor and issuing a temperature regulation instruction through a data acquisition module for regulation and control.

In the experimental process, if the experiment needs, the heat insulation cotton on the side of the box door can be opened, and the sample is operated through the rubber gloves connected in the two holes of the box door.

The box door 11 is transparent, so that the quality change of the test soil sample can be recorded in real time; and the surface area change or surface crack change of the test soil sample can be recorded by recording the later period through the camera and processing the later period.

Claims

1. The utility model provides a simple and easy constant temperature and humidity case that can supply soil body shrink experiment to use which characterized in that: comprises a box body (1), wherein a box door (11) is arranged on the box body (1); the utility model discloses a box, including box (1), saturated saline solution, first interlayer frame (6), second interlayer frame (7) are installed from up installing in proper order down on box (1) that the saturated saline solution held container (4), wherein place the balance that is equipped with the sample on first interlayer frame (6), second interlayer frame (7) below correspondence is installed with sample quantity, camera (12) that the position corresponds to second interlayer frame (7) below about both sides are equipped with heating element (3) in box (1), upper and lower end is equipped with first fan (2) respectively in box (1), second fan (10), saturated saline solution holds container (4) top.

2. The simple constant temperature and humidity box for soil shrinkage experiments according to claim 1, which is characterized in that: a temperature and humidity sensor (14) is arranged in the box body (1), and the temperature and humidity sensor (14) is connected with the data acquisition module.

3. The simple constant temperature and humidity box for soil shrinkage experiments according to claim 1, which is characterized in that: the second interlayer frame (7) is in a grid shape.

4. The simple constant temperature and humidity box for soil shrinkage experiments according to claim 1, which is characterized in that: the round hole (5) is arranged on the box door (11), and the round hole (5) is connected with the transparent long rubber glove in a sealing mode.

5. The simple constant temperature and humidity box for soil shrinkage experiments according to claim 1, which is characterized in that: the box body (1) is provided with hooks (9) along the circumferential direction at the outer upper end, and the heat insulation cotton (15) is arranged on the left side surface, the right side surface, the rear side surface and the top end surface of the box body (1) through the hooks (9).