A device for measuring the thermal conductivity of saline soil

Abstract

The utility model discloses a kind of saline soil thermal conductivity measuring devices, including machine body, the measuring mechanism is installed on the upper end of stand, middle part is equipped with mounting plate, the measuring cylinder is movably installed on mounting plate by discharging mechanism, the measuring mechanism includes hot plate and cold plate, the hot plate and cold plate are respectively arranged in the upper and lower ends of measuring cylinder, the application is by starting hydraulic cylinder to drive hot plate to move downwards to measuring cylinder, contact with saline soil, start hot plate, cold plate and temperature sensor, detect the axial temperature gradient distribution data in measuring cylinder, calculate the thermal conductivity of saline soil, by setting different hydraulic cylinder stroke, realize the different pressure of saline soil, to detect the thermal conductivity of saline soil under different pressure conditions, more practical, measurement data is more comprehensive, by setting discharging mechanism, it can be automatically taken out from hot plate and cold plate between measuring cylinder, it is convenient to collect saline soil in its interior, improve the convenience of operation.

Description

Technical Field

[0001] This utility model belongs to the field of thermal conductivity measurement technology, and in particular relates to a device for measuring the thermal conductivity of saline soil. Background Technology

[0002] Saline soil, as a special geological material, is widely distributed in Northwest my country and coastal areas. The crystallization-dissolution phase transition characteristics of its internal salts (such as sodium chloride and sodium sulfate) can significantly change the thermal conductivity of the soil. Accurately measuring the thermal conductivity of saline soil is of great significance for the stability assessment of frozen soil subgrades, the design of ground source heat pump systems, and the thermal calculation of building foundations in saline soil areas.

[0003] According to the authorization announcement number: CN206057227U, the title is: A thermal conductivity measuring device, comprising: a limiting device and a thermal conductivity measuring instrument, wherein the thermal conductivity measuring instrument includes a protective plate, a cold plate, and a hot plate; the limiting device is installed on the cold plate of the thermal conductivity measuring instrument and fixed by a fixing device. The measuring device provided by this utility model is highly practical and innovative. The limiting device provides accurate positioning, facilitates installation and disassembly, prevents excessive compression, protects the specimen, and facilitates subsequent thermal conductivity measurement and calculation.

[0004] The existing technology has the following drawbacks: on the one hand, it is impossible to accurately adjust the pressure on the sample and measure the thermal conductivity of the sample under different pressure conditions, and the measurement is not comprehensive enough; on the other hand, since the sample is located between the cold plate and the hot plate, it is inconvenient to place and take samples. Utility Model Content

[0005] The purpose of this invention is to provide a device for measuring the thermal conductivity of saline soil, in order to solve the technical problems mentioned in the background art, such as the inability to accurately adjust the pressure on the sample, the inability to measure the thermal conductivity of the sample under different pressure conditions, the incomplete measurement, and the inconvenience of placing and taking samples because the sample is located between the cold plate and the hot plate.

[0006] To achieve the above objectives, the specific technical solution of this utility model is as follows: A device for measuring the thermal conductivity of saline soil includes a body, an operating table on one side of the body, and columns fixedly installed on both sides inside the body. A measuring mechanism is installed at the upper end of the column, and an mounting plate is installed in the middle. A feeding mechanism is provided on the mounting plate, and a measuring cylinder is fixedly connected to the feeding mechanism. The measuring cylinder is movably mounted on the mounting plate through the feeding mechanism. The measuring mechanism includes a hot plate and a cold plate, which are respectively disposed at the upper and lower ends of the measuring cylinder.

[0007] A top plate is fixedly connected to the upper end of the column.

[0008] The measuring mechanism also includes a hydraulic cylinder, which is fixedly installed on the top plate, and the output end of the hydraulic cylinder is fixedly connected to a movable frame.

[0009] Guide rods are fixedly connected to both ends of the movable frame, and the guide rods are slidably sleeved inside the limiting cylinder.

[0010] The limiting cylinder is fixedly installed on the mounting plate, and a fixing frame is fixedly connected to the bottom of the limiting cylinder.

[0011] The hot plate and cold plate are concentric and are respectively fixedly installed in the middle of the movable frame and the fixed frame.

[0012] The feeding mechanism includes a mounting plate, which is fixedly mounted on the outer circumferential surface of the measuring cylinder. One end of the mounting plate is slidably sleeved on the slide rod, and the other end is fixedly connected to the output end of the electric push rod.

[0013] Both the slide bar and the electric push rod are fixedly mounted on the mounting plate.

[0014] A fixing plate is fixedly connected to one side of the mounting plate, and one end of the slide rod is fixedly installed on the fixing plate.

[0015] A connecting plate is connected to one side of the cold plate, and a funnel is sleeved inside the connecting plate. The bottom of the funnel is inserted into the collection bottle, and the bottom of the collection bottle is fixed in the fixing ring. The fixing ring is fixedly installed in the machine body.

[0016] The device for measuring the thermal conductivity of saline soil according to this invention has the following advantages:

[0017] 1. This device for measuring the thermal conductivity of saline soil uses a hydraulic cylinder to move a hot plate downwards into the measuring cylinder, where it contacts the saline soil. The hot plate, cold plate, and temperature sensor are activated to detect the axial temperature gradient distribution data within the measuring cylinder, and the thermal conductivity of the saline soil is calculated. By setting different hydraulic cylinder strokes, different pressures are applied to the saline soil, thus detecting the thermal conductivity of the saline soil under different pressure conditions. This device is more practical and provides more comprehensive measurement data.

[0018] 2. This device for measuring the thermal conductivity of saline soil, after measurement, moves the measuring cylinder outward by activating an electric push rod, so that the measuring cylinder is placed on the funnel with its bottom suspended. The saline soil is pressed down by gravity or external force, causing it to fall from the measuring cylinder into the funnel and finally into the collection bottle for collection. This design allows the measuring cylinder to be automatically removed from between the hot and cold plates, facilitating the collection of the saline soil inside and improving the ease of operation. Attached Figure Description

[0019] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of this utility model;

[0021] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention;

[0022] Figure 4 This is a front view structural diagram of the present invention;

[0023] Figure 5 For the present utility model Figure 4 Schematic diagram of the three-dimensional structure of the AA cross section;

[0024] Figure 6 This is a three-dimensional structural diagram of the feeding mechanism of this utility model in its first state;

[0025] Figure 7 This is a three-dimensional structural diagram of the feeding mechanism of this utility model in its second state;

[0026] Figure 8 This is a three-dimensional structural diagram of the collection bottle portion of this utility model.

[0027] The markings in the diagram are as follows: 1. Machine body; 11. Operating table; 12. Column; 13. Top plate; 2. Measuring mechanism; 21. Movable frame; 22. Fixed frame; 23. Hydraulic cylinder; 24. Hot plate; 25. Cold plate; 26. Limiting cylinder; 27. Guide rod; 3. Feeding mechanism; 31. Electric push rod; 32. Fixed plate; 33. Slide rod; 34. Mounting plate; 4. Mounting plate; 5. Funnel; 6. Collection bottle; 7. Measuring cylinder; 8. Connecting plate; 9. Fixing ring. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a device for measuring the thermal conductivity of saline soil.

[0029] As shown in Figure 1-2, the present invention discloses a device for measuring the thermal conductivity of saline soil, comprising a body 1, an operating platform 11 on one side of the body 1, and columns 12 fixedly installed on both sides inside the body 1. A measuring mechanism 2 is installed on the upper end of the column 12, and an mounting plate 4 is installed in the middle. A feeding mechanism 3 is provided on the mounting plate 4, and a measuring cylinder 7 is fixedly connected to the feeding mechanism 3. The measuring cylinder 7 is movably mounted on the mounting plate 4 through the feeding mechanism 3. The measuring mechanism 2 includes a hot plate 24 and a cold plate 25, which are respectively disposed at the upper and lower ends of the measuring cylinder 7.

[0030] The hot plate 24 has a built-in PTC heating element, and the cold plate 25 has a built-in semiconductor cooling chip to maintain a low temperature. The measuring cylinder 7 is moved to the position of the axis between the hot plate 24 and the cold plate 25 by the feeding mechanism 3. The operator sets the parameters through the operating table 11. The hot plate 24 generates a stable heat source according to the set temperature. The measuring cylinder 7 is axially installed to collect the axial temperature gradient distribution data in the measuring cylinder 7 in real time and calculate the thermal conductivity of the saline soil.

[0031] The top plate 13 is fixedly connected to the upper end of the column 12. The measuring mechanism 2 is located between the two columns 12 and its upper end is installed on the top plate 13. The two ends of the mounting plate 4 are fixedly connected to the two columns 12 respectively.

[0032] The measuring mechanism 2 also includes a hydraulic cylinder 23, which is fixedly installed on the top plate 13. The output end of the hydraulic cylinder 23 is fixedly connected to a movable frame 21. Both ends of the movable frame 21 are fixedly connected to guide rods 27. The guide rods 27 are slidably sleeved in the limiting cylinder 26. The limiting cylinder 26 is fixedly installed on the mounting plate 4. The bottom of the limiting cylinder 26 is fixedly connected to a fixed frame 22. The hot plate 24 and the cold plate 25 are concentric and are respectively fixedly installed in the middle of the movable frame 21 and the fixed frame 22.

[0033] Hydraulic cylinder 23 drives movable frame 21 and hot plate 24 to press down, guide rod 27 slides vertically along limiting cylinder 26, so that hot plate 24 moves into measuring cylinder 7 and contacts saline soil. After hot plate 24 and cold plate 25 are activated, measurement is performed. The thermal conductivity of saline soil under different pressures can also be measured by the pressing depth of hot plate 24, simulating the thermal conduction characteristics of saline soil under roadbed compaction engineering conditions.

[0034] The feeding mechanism 3 includes a mounting plate 34, which is fixedly mounted on the outer circumferential surface of the measuring cylinder 7. One end of the mounting plate 34 is slidably sleeved on the slide rod 33, and the other end is fixedly connected to the output end of the electric push rod 31. The slide rod 33 and the electric push rod 31 are both fixedly mounted on the mounting plate 4. A fixing plate 32 is fixedly connected to one side of the mounting plate 4, and one end of the slide rod 33 is fixedly mounted on the fixing plate 32.

[0035] After the measurement is completed, the hot plate 24 is moved upward, and then the electric push rod 31 is activated to push the measuring cylinder 7 outward, so that the bottom of the measuring cylinder 7 gradually moves from the cold plate 25 to the funnel 5, which facilitates the feeding of saline soil. The sliding rod 33 guides and limits the mounting plate 34 to ensure the stability of the movement of the measuring cylinder 7.

[0036] A connecting plate 8 is connected to one side of the cold plate 25. A funnel 5 is fitted inside the connecting plate 8. The bottom of the funnel 5 is inserted into the collection bottle 6. The bottom of the collection bottle 6 is fixed in the fixing ring 9. The fixing ring 9 is fixedly installed inside the machine body 1.

[0037] The bottom of the collection bottle 6 is inserted into the fixing ring 9 for fixation, and a funnel 5 is inserted into the top. The surface of the funnel 5 is flush with the connecting plate 8 and can be detachably fitted into the connecting plate 8. After the measurement is completed, the measuring cylinder 7 gradually moves along the surface of the connecting plate 8 onto the funnel 5, so that the bottom of the measuring cylinder 7 is suspended in the air. The saline soil is pressed down by gravity or external force, so that the saline soil falls from the measuring cylinder 7 into the funnel 5 and finally falls into the collection bottle 6 for collection. With this setting, the measuring cylinder 7 can be automatically removed between the hot plate 24 and the cold plate 25, which facilitates the collection of the saline soil inside and improves the convenience of operation.

[0038] Working principle of a device for measuring the thermal conductivity of saline soil:

[0039] The measuring cylinder 7 is placed on the cold plate 25. The saline soil is poured into the measuring cylinder 7. Then, the hydraulic cylinder 23 is activated to move the hot plate 24 downward into the measuring cylinder 7 to contact the saline soil. The hot plate 24, cold plate 25 and temperature sensor are activated to detect the axial temperature gradient distribution data inside the measuring cylinder 7 and calculate the thermal conductivity of the saline soil. By setting different strokes of the hydraulic cylinder 23, different pressures are applied to the saline soil, thereby detecting the thermal conductivity of the saline soil under different pressure conditions. This method is more practical and provides more comprehensive measurement data. After the measurement is completed, the electric push rod 31 is activated to move the measuring cylinder 7 outward, so that the measuring cylinder 7 moves onto the funnel 5. The bottom of the measuring cylinder 7 is suspended. The saline soil is pressed down by gravity or external force, so that the saline soil falls from the measuring cylinder 7 into the funnel 5 and finally falls into the collection bottle 6 for collection.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A device for measuring the thermal conductivity of saline soil, characterized in that: include The machine body (1) has an operating table (11) on one side. Columns (12) are fixedly installed on both sides inside the machine body (1). A measuring mechanism (2) is installed on the upper end of the column (12) and an installation plate (4) is installed in the middle. A feeding mechanism (3) is provided on the installation plate (4). A measuring cylinder (7) is fixedly connected to the feeding mechanism (3). The measuring cylinder (7) is movably installed on the installation plate (4) through the feeding mechanism (3). The measuring mechanism (2) includes a hot plate (24) and a cold plate (25). The hot plate (24) and the cold plate (25) are respectively located at the upper and lower ends of the measuring cylinder (7).

2. The device for measuring the thermal conductivity of saline soil according to claim 1, characterized in that: The top plate (13) is fixedly connected to the upper end of the column (12).

3. The device for measuring the thermal conductivity of saline soil according to claim 2, characterized in that: The measuring mechanism (2) also includes a hydraulic cylinder (23), which is fixedly installed on the top plate (13), and the output end of the hydraulic cylinder (23) is fixedly connected to a movable frame (21).

4. The device for measuring the thermal conductivity of saline soil according to claim 3, characterized in that: Both ends of the movable frame (21) are fixedly connected to guide rods (27), and the guide rods (27) are slidably sleeved in the limiting cylinder (26).

5. The device for measuring the thermal conductivity of saline soil according to claim 4, characterized in that: The limiting cylinder (26) is fixedly installed on the mounting plate (4), and a fixing bracket (22) is fixedly connected to the bottom of the limiting cylinder (26).

6. The device for measuring the thermal conductivity of saline soil according to claim 5, characterized in that: The hot plate (24) and cold plate (25) are concentric and are respectively fixedly installed in the middle of the movable frame (21) and the fixed frame (22).

7. The device for measuring the thermal conductivity of saline soil according to claim 1, characterized in that: The feeding mechanism (3) includes a mounting plate (34), which is fixedly mounted on the outer circumferential surface of the measuring cylinder (7). One end of the mounting plate (34) is slidably sleeved on the slide rod (33), and the other end is fixedly connected to the output end of the electric push rod (31).

8. The device for measuring the thermal conductivity of saline soil according to claim 7, characterized in that: Both the slide bar (33) and the electric push rod (31) are fixedly installed on the mounting plate (4).

9. The device for measuring the thermal conductivity of saline soil according to claim 8, characterized in that: A fixing plate (32) is fixedly connected to one side of the mounting plate (4), and one end of the slide rod (33) is fixedly installed on the fixing plate (32).

10. The device for measuring the thermal conductivity of saline soil according to claim 1, characterized in that: A connecting plate (8) is connected to one side of the cold plate (25). A funnel (5) is fitted inside the connecting plate (8). The bottom of the funnel (5) is inserted into the collection bottle (6). The bottom of the collection bottle (6) is fixed inside the fixing ring (9). The fixing ring (9) is fixedly installed inside the machine body (1).

Images