Combined device for rapidly measuring moisture content of cohesive soil and sandy soil
By combining microwave oven and electronic weighing technology in the device, the measurement error caused by water evaporation after soil sampling is solved, providing a fast, accurate and safe method for determining soil moisture content, which is suitable for highway engineering surveys.
Patent Information
- Application Number
- CN202422804468.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-18
AI Technical Summary
In highway engineering surveys, incomplete sealing after sampling leads to moisture evaporation and loss, affecting the original state of the soil sample and resulting in poor measurement accuracy. Furthermore, existing equipment is bulky and inconvenient to carry.
A rapid testing device was designed, comprising a combined cabinet, an electronic balance, a sample tray, and a microwave oven. It utilizes the microwave oven for rapid drying or the alcohol combustion method to determine the moisture content of cohesive and sandy soils, combined with electronic weighing for precise measurement. Fireproof and heat-insulating materials are provided to ensure safety.
It enables rapid and accurate measurement of soil moisture content on construction sites, avoiding errors caused by moisture evaporation, meeting regulatory requirements, and the device is lightweight, portable, and highly safe.
Smart Images
Figure CN223513079U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of determination of cohesive soil, and specifically relates to a combined device for rapidly determining water content of cohesive soil and sandy soil. BACKGROUND
[0002] The device is mainly used for survey and design projects of highway engineering. Since highway engineering projects are linear engineering, and the road is generally long, less than dozens of kilometers, more than two or three hundred or even four or five hundred kilometers, and most of the highway construction projects are located in remote areas or mountainous areas, the distance from the laboratory site to the road is very far. In addition, the period of highway survey projects in the survey process is relatively long, less than ten or twenty days, and more than two or three months are common. Therefore, the soil samples taken during the highway engineering geological survey are generally accumulated to a certain amount before being arranged for sample delivery. From the cost point of view, it is reasonable. Therefore, the soil samples are generally kept on the construction site for more than a week, more than half a month or even more than twenty days, which leads to water evaporation loss of the taken soil samples due to incomplete sealing, especially soft soil samples. The soft soil is mostly in a flow plastic to soft plastic state, and the soil sample is irregular in shape, making it difficult to seal perfectly. Therefore, the test sample and the environment of the taken soil sample at the time of sampling have changed qualitatively, so that the experimental results cannot correctly reflect the original state of the soil, greatly affecting the survey accuracy. Therefore, it is very necessary and has very important significance to design a device that can timely determine the water content of the taken soil sample on the construction site.
[0003] Before determining the water content by using the device, we usually use a transportation tool to send the samples to the designated laboratory in batches for testing. The laboratory usually uses an oven to dry the test sample, and the drying time is relatively long. The drying time for cohesive soil is not less than 8 hours, the drying time for sandy soil is not less than 6 hours, and the drying time for organic soil is not less than 24 hours. The oven is heavy and inconvenient to move and carry. The device has the advantages of light weight, small volume, and convenient carrying. The device can be taken with the project department. When the device is used to determine the water content, the time is short, and the measurement accuracy is high. The device can meet the accuracy requirements specified in the specification. In addition, the device has good fire safety during testing because the device is surrounded by fireproof and heat-insulating cotton. SUMMARY
[0004] In view of the deficiencies of the prior art, the utility model provides a combined device for rapidly determining water content of cohesive soil and sandy soil, which solves the problem of water evaporation loss of the taken sample on the construction site and poor measurement accuracy.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: a combined device for quickly measuring water content of clayey soil and sandy soil, which comprises a combined cabinet, an electronic balance, a sample box tray, a microwave oven and a general control switch, top grooves, middle grooves and low grooves are formed in the combined cabinet, the electronic balance is arranged in the top groove, the sample box tray is arranged in the middle groove, the microwave oven is arranged in the low groove, the general control switch is arranged on one side of the combined cabinet, and the general control switch is connected with the electronic balance, the sample box tray and the microwave oven through power lines.
[0006] Further, the combined cabinet comprises an aluminum alloy outer frame, heat insulation cotton, a handle, a leveling bubble and leveling bolts, the aluminum alloy outer frame is arranged on one side of the combined cabinet, an aluminum alloy inner frame is arranged on the inner side of the top groove of the combined cabinet, the heat insulation cotton is arranged between the aluminum alloy outer frame and the aluminum alloy inner frame, the handle is arranged on the top of the combined cabinet, the leveling bubble is arranged on the middle part below the handle on the top of the combined cabinet, and the leveling bolts are arranged on the bottom of the aluminum alloy outer frame.
[0007] Further, the low groove comprises a sponge body, and the sponge body is arranged on the inner wall of the low groove.
[0008] Further, the general control switch comprises a general power control socket, a first general control power line, an electronic balance control switch and an electronic balance connecting power line, the general power control socket is arranged on the upper part of the outer side wall of the combined cabinet, the first general control power line is connected to the general power control socket, the electronic balance control switch is arranged on the upper part of the outer side wall of the combined cabinet and is parallel to the electronic balance in height, the electronic balance and the general power control socket are connected through the first general control power line, and the electronic balance control switch and the electronic balance are connected through the electronic balance connecting power line.
[0009] Further, the general control switch further comprises a second general control power line, an exhaust fan control switch and a microwave oven control switch, the microwave oven control switch is arranged on the lower part of the outer side wall of the combined cabinet, the general control switch and the microwave oven control switch are connected through the second general control power line, and the second general control power line is also connected with the exhaust fan control switch.
[0010] Further, an exhaust fan is arranged on the outer side wall of the combined cabinet and is below the electronic balance control switch, the exhaust fan is parallel to the exhaust fan control switch in height, and the exhaust fan and the exhaust fan control switch are connected through the power line of the exhaust fan control switch.
[0011] Further, the microwave oven control switch and the microwave oven are connected through a microwave oven control power line.
[0012] Further, three baffle plates are arranged on the combined cabinet and are close to the openings of the top grooves, the middle grooves and the low grooves, the three baffle plates and the combined cabinet are connected through hinges, and handles are arranged on the three baffle plates.
[0013] Compared with the prior art, the utility model has the advantages that (1), the utility model can timely determine the moisture content of the taken wet soil sample through the combined cabinet, avoids the error caused by the evaporation loss of the wet soil sample due to the long placement time, and thus avoids the misjudgment of the bearing capacity characteristic value of the soft soil foundation caused by the soil state of the site.
[0014] (2), the utility model has the characteristics of simple operation, high speed, high safety and high efficiency, and the measurement accuracy meets the specification requirements; the determination of the moisture content of one wet soil sample generally does not exceed 30 min, and at least 1 day and a half is required for the oven drying method; whether the alcohol combustion method or the microwave oven method is used, the safety factor of the device is very high, and there is no safety hidden danger in the field, and the safety is high. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 It is a combined cabinet side view of the utility model.
[0016] Fig. 2 It is a combined cabinet plan view of the utility model.
[0017] Marked in the figure: 1, combined cabinet; 101, aluminum alloy outer frame; 102, heat insulation cotton; 103, handle; 104, leveling bubble; 105, leveling bolt; 11, top groove; 1101, aluminum alloy inner frame; 1102, electronic balance; 12, middle groove; 1201, style box tray; 13, low groove; 1301, sponge body; 1302, microwave oven; 21, total power control socket; 22, first total control power line; 23, electronic balance control switch; 24, electronic balance connection power line; 25, second total control power line; 26, exhaust fan control switch; 27, exhaust fan; 28, microwave oven control switch; 29, microwave oven control power line. DETAILED DESCRIPTION
[0018] As shown in Figs. 1-2 The utility model provides a technical scheme: a combined device for rapidly determining the moisture content of cohesive soil and sandy soil, which comprises a combined cabinet 1, an electronic balance 1102, a style box tray 1201, a microwave oven 1302 and a total control switch, the combined cabinet 1 is provided with a top groove 11, a middle groove 12 and a low groove 13, the electronic balance 1102 is used to be placed in the top groove 11, the style box tray 1201 is used to be placed in the middle groove 12, the microwave oven 1302 is used to be placed in the low groove 13, one side of the combined cabinet 1 is provided with the total control switch, and the total control switch is connected with the electronic balance 1102, the style box tray 1201 and the microwave oven 1302 through power lines.
[0019] The combination cabinet body 1 includes an aluminum alloy outer frame 101, heat insulation cotton 102, a handle 103, a leveling bubble 104 and leveling bolts 105. The aluminum alloy outer frame 101 is arranged on one side of the combination cabinet body 1 and has a thickness of about 2 mm. An aluminum alloy inner frame 1101 is arranged on the inner side of the top groove 11 of the combination cabinet body 1 and has a thickness of about 2 mm. The heat insulation cotton 102 is arranged between the aluminum alloy outer frame 101 and the aluminum alloy inner frame 1101 and has a thickness of not less than 1 cm. The handle 103 is arranged on the top of the combination cabinet body 1. The leveling bubble 104 is arranged on the top of the combination cabinet body 1 and below the handle 103. The leveling bolts 105 are arranged on the bottom of the aluminum alloy outer frame 101.
[0020] The low groove 13 includes a sponge body 1301 arranged on the inner wall of the low groove 13.
[0021] The total control switch includes a total power control socket 21, a first total control power line 22, an electronic balance control switch 23 and an electronic balance connecting power line 24. The total power control socket 21 is arranged on the upper part of the outer side wall of the combination cabinet body 1. The first total control power line 22 is connected to the total power control socket 21. The electronic balance control switch 23 is arranged on the upper part of the outer side wall of the combination cabinet body 1 and is parallel to the electronic balance 1102 in height. The electronic balance 1102 and the total power control socket 21 are connected through the first total control power line 22. The electronic balance control switch 23 and the electronic balance 1102 are connected through the electronic balance connecting power line 24.
[0022] The total control switch further includes a second total control power line 25, an exhaust fan control switch 26 and a microwave oven control switch 28. The microwave oven control switch 28 is arranged on the lower part of the outer side wall of the combination cabinet body 1. The total control switch and the microwave oven control switch 28 are connected through the second total control power line 25. The second total control power line 25 is also connected with the exhaust fan control switch 26.
[0023] An exhaust fan 27 is arranged on the outer side wall of the combination cabinet body 1 and below the electronic balance control switch 23. The exhaust fan 27 is parallel to the exhaust fan control switch 26 in height. The exhaust fan 27 and the exhaust fan control switch 26 are connected through the power line of the exhaust fan control switch 26.
[0024] The microwave oven control switch 28 and the microwave oven 1302 are connected through a microwave oven control power line 29.
[0025] Three baffle plates 14 are arranged on the combination cabinet body 1 and close to the openings of the top groove 11, the middle groove 12 and the low groove 13. The three baffle plates 14 are connected with the combination cabinet body 1 through hinges and have handles.
[0026] The electronic balance 1102 has an accuracy of 0.01 g, and the appearance size of the electronic balance 1102 is less than 30 cm in length and width.
[0027] The sample box tray 1201 has a thickness of 1 cm and a length and a width of 25 cm.
[0028] The microwave oven 1302 has a capacity of not more than 20 L, and the size of the microwave oven 1302 is less than 30 cm in length and width.
[0029] The combined cabinet 1 has a length of 39 cm, a width of 39 cm, and a height of 103 cm.
[0030] The overall size of the combined cabinet 1 is 39 cm in length, 39 cm in width, and 103 cm in height.
[0031] The size of the top groove 11 of the combined cabinet 1 is 35 cm in length, 35 cm in width, and 35 cm in height, and the size of the baffle 14 of the top groove 11 is 39 cm in length and 37.9 cm in height.
[0032] The size of the middle groove 12 of the combined cabinet 1 is 35 cm in length, 35 cm in width, and 25 cm in height, and the size of the baffle 14 of the middle groove 12 is 39 cm in length and 26.8 cm in height.
[0033] The size of the low groove 13 of the combined cabinet 1 is 35 cm in length, 35 cm in width, and 35 cm in height, and the size of the baffle 14 of the low groove 13 is 39 cm in length and 37.9 cm in height.
[0034] The spacing between the baffles 14 of the top groove 11, the middle groove 12, and the low groove 13 is 2 mm.
[0035] The moisture content determination operation process is as follows: first, adjust the inclination of the combined cabinet 1 by adjusting the leveling bolts 105 to ensure that the leveling bubble 104 of the combined cabinet 1 is centered, so that the entire combined cabinet 1 is leveled, connect the total power supply control socket 21 of the combined cabinet 1 to the external power plug, power the combined cabinet 1, open the baffle 14 of the top groove 11, and then turn on the electronic balance 1102 through the electronic balance control switch 23, place the empty sample box on the tray of the electronic balance 1102, weigh the mass of the empty sample box with the electronic balance 1102 to an accuracy of 0.01 g, take a representative sample of not less than 10 g, and place the wet soil sample into the weighed sample box, weigh the mass of the sample box and the wet soil sample to an accuracy of 0.01 g.
[0036] When the wet soil sample is dried by the alcohol combustion method, the alcohol is injected into the sample box containing the wet soil sample through the dropper until a free liquid surface appears in the sample box. To ensure that the alcohol is fully mixed and uniform in the sample box, the bottom of the sample box is gently tapped on the cabinet of the combined cabinet 1, allowing the alcohol to mix fully and uniformly in the sample box. The baffle 14 of the middle groove 12 is opened, and the uniformly mixed sample box is placed on the sample box tray 1201. The exhaust fan 27 is turned on through the exhaust fan control switch 26, and the alcohol in the sample box is ignited and burned until the flame is extinguished. After the flame is extinguished and cooled for a few minutes, the alcohol is again dripped into the sample box using the dropper, and the combustion is repeated twice. After the third flame is extinguished and cooled, the sample box is removed and the lid is closed. At this time, the wet soil sample in the sample box is burned into dry soil. The closed sample box is placed on the electronic balance 1102 of the top groove 11, and the mass of the dry soil and the sample box is weighed to an accuracy of 0.01 g. Finally, the data is arranged according to the requirements of T 0103-2019 of the Highway Soil Test Procedure (JTG3430-2019) to obtain the moisture content of the wet soil sample. After the test is completed, all switches are turned off, and the total power control socket 21 of the combined cabinet 1 is disconnected from the external power supply plug.
[0037] When the wet soil sample is dried by the microwave oven 1302, the mass of the empty sample box is weighed to an accuracy of 0.01 g using the electronic balance 1102. The wet soil sample is placed in the weighed sample box, and the mass of the sample box and the wet soil sample is weighed to an accuracy of 0.01 g. The microwave oven 1302 is turned on through the microwave oven control switch 28, the baffle 14 of the low groove 13 is opened, and the sample box containing the wet soil sample is placed in the microwave oven 1302. The microwave oven 1302 is turned on, the high heat is selected, and the baking time is about 10-15 minutes. After cooling, the wet soil sample in the sample box is baked into dry soil. The sample box is removed and the lid is closed. The sample box is placed on the electronic balance 1102 again, and the mass of the dry soil and the sample box is weighed to an accuracy of 0.01 g. Finally, the data is arranged according to the requirements of T 0103-2019 of the Highway Soil Test Procedure (JTG3430-2019) to obtain the moisture content of the wet soil sample. After the test is completed, all switches are turned off, and the total power control socket 21 of the combined cabinet 1 is disconnected from the external power supply plug.
[0038] Although embodiments of the present application have been shown and described; it is to be understood that for the purpose of the present application, the embodiments can be changed in many ways by those skilled in the art without departing from the spirit and principles of the present application; the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A combined device for rapidly determining the moisture content of cohesive and sandy soils, comprising a combined cabinet (1), an electronic balance (1102), a sample tray (1201), a microwave oven (1302), and a main control switch, characterized in that: The combination cabinet (1) is provided with a top groove (11), a middle groove (12) and a low groove (13), an electronic scale (1102) is arranged in the top groove (11), a sample box tray (1201) is arranged in the middle groove (12), and a microwave oven (1302) is arranged in the low groove (13), and a general control switch is arranged on one side of the combination cabinet (1) and connected with the electronic scale (1102), the sample box tray (1201) and the microwave oven (1302) through power lines.
2. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 1, characterized in that: The combination cabinet (1) comprises an aluminum alloy outer frame (101), heat insulation cotton (102), a handle (103), a leveling bubble (104) and leveling bolts (105), the aluminum alloy outer frame (101) is arranged on one side of the combination cabinet (1), an aluminum alloy inner frame (1101) is arranged on the inner side of the top groove (11) of the combination cabinet (1), the heat insulation cotton (102) is arranged between the aluminum alloy outer frame (101) and the aluminum alloy inner frame (1101), the handle (103) is arranged on the top of the combination cabinet (1), the leveling bubble (104) is arranged on the top of the combination cabinet (1) and close to the middle part below the handle (103), and the leveling bolts (105) are arranged on the bottom of the aluminum alloy outer frame (101).
3. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 2, characterized in that: The low groove (13) comprises a sponge body (1301), and the sponge body (1301) is arranged on the inner wall of the low groove (13).
4. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 3, characterized in that: The general control switch comprises a general power control socket (21), a first general control power line (22), an electronic scale control switch (23) and an electronic scale connecting power line (24), the general power control socket (21) is arranged on the upper part of the outer side wall of the combination cabinet (1), the first general control power line (22) is connected with the general power control socket (21), the electronic scale control switch (23) is arranged on the upper part of the outer side wall of the combination cabinet (1) and is parallel to the electronic scale (1102) in height, the electronic scale (1102) and the general power control socket (21) are connected through the first general control power line (22), and the electronic scale control switch (23) and the electronic scale (1102) are connected through the electronic scale connecting power line (24).
5. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 4, characterized in that: The general control switch further comprises a second general control power line (25), an exhaust fan control switch (26) and a microwave oven control switch (28), the microwave oven control switch (28) is arranged on the lower part of the outer side wall of the combination cabinet (1), the general control switch and the microwave oven control switch (28) are connected through the second general control power line (25), and the second general control power line (25) is also connected with the exhaust fan control switch (26).
6. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 5, characterized in that: An exhaust fan (27) is arranged on the outer side wall of the combination cabinet (1) and close to the lower part of the electronic scale control switch (23), the exhaust fan (27) is parallel to the exhaust fan control switch (26) in height, and the exhaust fan (27) and the exhaust fan control switch (26) are connected through the power line of the exhaust fan control switch (26).
7. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 6, characterized in that: The microwave oven control switch (28) and the microwave oven (1302) are connected through a microwave oven control power line (29).
8. The combined device for quickly determining the water content of clayey soil and sandy soil according to claim 7, characterized in that: The combination cabinet body (1) is provided with three baffle plates (14) near the top groove (11), the middle groove (12) and the low groove (13) respectively, the baffle plates (14) are connected with the combination cabinet body (1) through hinges, and handles are arranged on the baffle plates (14).