A drying device for portable detection of foundation soil compactness
Patent Information
- Application Number
- CN202522433190.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-17
AI Technical Summary
[0013]与现有技术相比，本实用新型的有益效果是：该地基土压实度便携式检测的烘干装置不仅实现了现场烘干减少误差的功能，而且实现了实时测量样本重量的功能，还实现了加速水分蒸发的功能；
Smart Images
Figure CN224838216U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foundation testing technology, specifically a drying device for portable testing of foundation soil compaction. Background Technology
[0002] Compaction degree is a key indicator for evaluating the construction quality of foundations, roadbeds, and embankment projects. It reflects the degree to which the soil is compacted and is usually expressed as a percentage of the dry density measured on-site to the maximum dry density obtained from the indoor standard compaction test.
[0003] Taking the most common ring cutter method as an example, an undisturbed soil sample is obtained by cutting through the soil layer with a ring cutter. The wet density of the soil is calculated by measuring the mass of the soil sample, and then combined with the measured moisture content to obtain the dry density of the soil. Measuring the moisture content requires an oven. A certain amount of sample soil is placed in an aluminum box and dried in an oven at a high temperature between 105-110℃ for 6-8 hours. The dry density is then calculated by weighing. Currently, the ovens used for testing are relatively large and can only be used in a laboratory. However, the sampling location is outdoors and relatively random. The journey from the sampling site to the laboratory requires a certain amount of time and distance, which can easily cause moisture loss from the sample and affect the accuracy of the final test. Rapid on-site testing generally uses the alcohol combustion method, but the alcohol combustion method can easily destroy the organic matter in the soil sample, resulting in a large error in the actual test results.
[0004] Now, a novel portable drying device for testing the compaction degree of foundation soil is proposed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a portable drying device for testing the compaction degree of foundation soil, so as to solve the problem mentioned in the background art that the existing drying equipment is not convenient to carry to the site.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable drying device for detecting the compaction degree of foundation soil, comprising a main shell, a PLC controller fixedly connected to the right side inside the main shell, a first shell fixedly connected to the left side of the PLC controller, a second shell fixedly connected to the left side inside the main shell, a handle fixedly connected to the top of the main shell, and a portable drying component disposed inside the second shell.
[0007] The drying assembly includes a heat insulation liner. The heat insulation liner is fixedly connected inside the second housing. An infrared temperature sensor is fixedly installed at the middle position of the top of the heat insulation liner. A ventilation slot is opened on the right side of the heat insulation liner. Multiple sets of heating wires are fixedly installed between the upper and lower ends inside the ventilation slot. A heat-resistant fan is fixedly installed on the right side of the heat insulation liner. A sealing door is hinged to the front end of the second housing. A third housing is fixedly connected to the bottom end of the second housing. A first air guide pipe is provided on the left side of the top of the third housing. A second air guide pipe is provided on the right side of the top of the third housing. Multiple sets of internally threaded sockets are fixedly connected to the left side of the third housing. Externally threaded tubular shells are inserted into the internally threaded sockets from left to right. A water-absorbing resin rod is horizontally placed inside the externally threaded tubular shell. An internally threaded cap is threadedly connected to the left side of the externally threaded tubular shell.
[0008] As a further technical solution of this utility model, the main shell is 70cm long, 30cm wide, and 60cm high. There is a distance between the right side of the heat insulation liner and the right side of the second shell interior. The ventilation groove passes through the right side of the heat insulation liner.
[0009] As a further technical solution of this utility model, the interior of the heat insulation liner and the third shell are connected through the first air guide pipe, and the interior of the second shell and the third shell are connected through the second air guide pipe.
[0010] As a further technical solution of this utility model, the external thread of the external threaded tubular shell and the internal thread of the internal threaded socket are matched, and multiple sets of holes are opened on the surface of the external threaded tubular shell. The PLC controller, infrared temperature sensor, heating wire, and heat-resistant fan are electrically connected.
[0011] As a further technical solution of this utility model, a base support is fixedly connected to the middle position of the bottom of the inner side of the heat insulation lining, a support plate is provided at the top of the outer side of the base support, and a weighing sensor is fixedly installed at the four corners of the top of the base support. The shape and size of the inner side of the bottom of the support plate are adapted to the shape and size of the outer side of the top of the base support. The base support and the support plate are not in contact. The PLC controller and the weighing sensor are electrically connected.
[0012] As a further technical solution of this utility model, a miniature vacuum pump is fixedly installed at the bottom of the first housing, a pressure stabilizing tank is fixedly connected to the right side of the first housing, an electromagnetic valve is fixedly connected to the left side of the first housing, a connecting pipe is fixedly connected between the electromagnetic valve and the pressure stabilizing tank, an outlet pipe is fixedly connected between the heat insulation liner and the electromagnetic valve, the interiors of the heat insulation liner and the outlet pipe are connected, the top of the miniature vacuum pump is connected to the bottom of the pressure stabilizing tank, and the PLC controller, the electromagnetic valve, and the miniature vacuum pump are electrically connected.
[0013] Compared with the prior art, the beneficial effects of this utility model are: the drying device for portable testing of foundation soil compaction not only realizes the function of on-site drying to reduce errors, but also realizes the function of real-time measurement of sample weight, and also realizes the function of accelerating moisture evaporation; (1) By setting up a second shell, heat insulation liner, infrared temperature sensor, ventilation slot, heating wire, heat-resistant fan, sealing door, third shell, first air guide pipe, second air guide pipe, internal threaded socket, external threaded tubular shell, water-absorbing resin rod and internal threaded cap, the handle is convenient for carrying and transferring during use. The treated sample soil is placed in the aluminum box, the sealing door is opened, the aluminum box is placed on the tray, and then the sealing door is closed to reduce the air pressure in the second shell to 0.7~0.9 standard atmospheres. Then the heating wire is energized and heated. Driven by the heat-resistant fan, the airflow passes through the heating wire and fills the entire heat insulation liner at a uniform speed. It enters the third shell along the first air guide pipe and then flows back to the second shell and heat insulation liner along the second air guide pipe, forming an airflow circulation. The low-power heat-resistant fan has a speed of 0.3 revolutions per minute. The airflow generated is weak, and when the airflow is slowly circulated, it is insufficient to blow up the sample soil below. During the circulation process, the water-absorbing resin rod inside the external threaded tubular shell continuously captures water molecules in the air. The external threaded tubular shell can be unscrewed from the internal threaded socket. Loosening and removing the internal threaded cap allows the water-absorbing resin rod to be replaced. An infrared temperature sensor measures the material temperature in real time to prevent overheating from damaging the components. The overall length of the equipment is 70cm, width is 30cm, and height is 60cm, which is the size of a hand-held suitcase. Its small size allows it to be carried to the construction site for direct drying and testing via the handle 26. This avoids the errors of the alcohol combustion method and reduces the evaporation of moisture from the sample during transportation to the laboratory, ensuring the accuracy of the test and realizing the function of on-site drying to reduce errors. (2) By setting up a base, a tray and a weighing sensor, when the sample is placed horizontally on the tray, the weighing sensor on the base monitors the actual weight of the sample above in real time and displays it on the display screen of the PLC controller, which is convenient to view and realizes the function of real-time measurement of sample weight. (3) By setting up an air outlet pipe, a solenoid valve, a connecting pipe, a pressure stabilizing tank and a micro vacuum pump, when in use, before heating, the micro vacuum pump will discharge a small amount of air from the inside of the second housing, so that the internal atmospheric pressure is lower than the external standard atmospheric pressure, thereby reducing the boiling point of water and accelerating drying. The pipeline structure consisting of the air outlet pipe, the solenoid valve, the connecting pipe and the pressure stabilizing tank can stabilize the air pressure on the one hand, and prevent backflow of airflow on the other hand, thus realizing the function of accelerating water evaporation. Attached Figure Description
[0014] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 This is a top-view enlarged structural diagram of the externally threaded tubular shell of this utility model; Figure 4 This is a top view of a partially enlarged cross-sectional structure of the pallet of this utility model.
[0015] In the diagram: 1. Main housing; 2. PLC controller; 3. First housing; 4. Second housing; 5. Thermal insulation lining; 6. Infrared temperature sensor; 7. Ventilation slot; 8. Heating wire; 9. Heat-resistant fan; 10. Sealing door; 11. Third housing; 12. First air duct; 13. Second air duct; 14. Internal threaded socket; 15. External threaded tubular shell; 16. Water-absorbing resin rod; 17. Internal threaded cap; 18. Base support; 19. Support plate; 20. Weighing sensor; 21. Air outlet pipe; 22. Solenoid valve; 23. Connecting pipe; 24. Pressure stabilizing tank; 25. Miniature vacuum pump; 26. Handle. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Example: Please refer to Figure 1-4 A portable drying device for detecting the compaction degree of foundation soil includes a main shell 1, a PLC controller 2 fixedly connected to the right side inside the main shell 1, a first shell 3 fixedly connected to the left side of the PLC controller 2, a second shell 4 fixedly connected to the left side inside the main shell 1, a handle 26 fixedly connected to the top of the main shell 1, and a portable drying component disposed inside the second shell 4. Please see Figure 1-4A drying device for a portable test of foundation soil compaction also includes a drying component. The drying component includes a heat insulation liner 5. The heat insulation liner 5 is fixedly connected inside the second housing 4. An infrared temperature sensor 6 is fixedly installed at the middle position of the top of the heat insulation liner 5. A ventilation slot 7 is opened on the right side of the heat insulation liner 5. Multiple sets of heating wires 8 are fixedly installed between the upper and lower ends inside the ventilation slot 7. A heat-resistant fan 9 is fixedly installed on the right side of the heat insulation liner 5. A sealing door 10 is hinged to the front end of the second housing 4. A third housing 11 is fixedly connected to the bottom end of the second housing 4. A first air guide pipe 12 is provided on the left side of the top of the third housing 11. A second air guide pipe 13 is provided on the right side of the top of the third housing 11. Multiple sets of internal threaded sockets 14 are fixedly connected to the left side of the third housing 11. An external threaded tubular shell 15 is inserted into the internal threaded socket 14 from left to right. A water-absorbing resin rod 16 is horizontally placed inside the external threaded tubular shell 15. An internal threaded cap 17 is threadedly connected to the left side of the external threaded tubular shell 15. The main shell 1 is 70cm long, 30cm wide, and 60cm high. There is a distance between the right side of the heat insulation liner 5 and the right side of the interior of the second shell 4. The ventilation slot 7 runs through the right side of the heat insulation liner 5. The interior of the heat insulation liner 5 and the third shell 11 are connected by the first air guide pipe 12. The interior of the second shell 4 and the third shell 11 are connected by the second air guide pipe 13. The external thread of the external threaded tubular shell 15 matches the internal thread of the internal threaded socket 14. The surface of the external threaded tubular shell 15 has multiple sets of holes. The PLC controller 2, infrared temperature sensor 6, heating wire 8, and heat-resistant fan 9 are electrically connected, which makes it easy to carry while ensuring drying performance. Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the heating wire 8 heats up when energized. Driven by the heat-resistant fan 9, the airflow passes through the heating wire 8 and quickly fills the entire interior of the heat insulation liner 5. It then enters the third housing 11 along the first air duct 12 and flows back to the second housing 4 and the heat insulation liner 5 along the second air duct 13, forming an airflow circulation. The low-power heat-resistant fan 9 rotates at 0.3 rpm, and the airflow generated is weak. It is insufficient to blow up the sample soil below when the airflow is slowly circulating. During the circulation, the water-absorbing resin rod 16 inside the external threaded tubular shell 15 continuously captures water molecules in the air. The external threaded tubular shell 15 can be unscrewed from the internal threaded socket 14. The water-absorbing resin rod 16 can be replaced by loosening and removing the internal threaded cap 17. The infrared temperature sensor 6 measures the material temperature in real time to prevent overheating from damaging the composition. The equipment is small in size and easy to carry to the construction site.
[0018] A base support 18 is fixedly connected to the middle position of the bottom of the inner side of the heat insulation liner 5. A support plate 19 is provided at the top of the outer side of the base support 18. Weighing sensors 20 are fixedly installed at the four corners of the top of the base support 18. The shape and size of the inner side of the bottom of the support plate 19 are adapted to the shape and size of the outer side of the top of the base support 18. The base support 18 and the support plate 19 do not contact each other. The PLC controller 2 and the weighing sensors 20 are electrically connected to facilitate weighing. Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the sample is placed horizontally on the tray 19, and the weighing sensor 20 on the bottom tray 18 monitors the actual weight of the sample in real time and displays it on the display screen of the PLC controller 2 for easy viewing.
[0019] A miniature vacuum pump 25 is fixedly installed at the bottom inside the first housing 3. A pressure stabilizing tank 24 is fixedly connected to the right side inside the first housing 3. A solenoid valve 22 is fixedly connected to the left side inside the first housing 3. A connecting pipe 23 is fixedly connected between the solenoid valve 22 and the pressure stabilizing tank 24. An air outlet pipe 21 is fixedly connected between the heat insulation liner 5 and the solenoid valve 22. The heat insulation liner 5 and the air outlet pipe 21 are internally connected. The top of the miniature vacuum pump 25 is connected to the bottom of the pressure stabilizing tank 24. The PLC controller 2, the solenoid valve 22, and the miniature vacuum pump 25 are electrically connected to accelerate drying. Specifically, such as Figure 1 and Figure 2 As shown, the miniature vacuum pump 25 expels a small amount of air from inside the second housing 4, making its internal atmospheric pressure lower than the external standard atmospheric pressure, thereby lowering the boiling point of water and accelerating drying.
[0020] Working Principle: In use, the handle 26 facilitates carrying and transferring the processed sample soil. The prepared sample soil is placed in the aluminum box, the sealing door 10 is opened, and the aluminum box is placed on the tray 19. The weighing sensor 20 on the bottom tray 18 monitors the actual weight of the sample in real time and displays it on the screen of the PLC controller 2 for easy viewing. Then, the sealing door 10 is closed. Before heating, the micro vacuum pump 25 discharges a small amount of air from the second housing 4, lowering the internal atmospheric pressure below the external standard atmospheric pressure, thereby reducing the boiling point of water and accelerating drying. The pipeline structure consisting of the air outlet pipe 21, solenoid valve 22, connecting pipe 23, and pressure stabilizing tank 24 stabilizes the air pressure and prevents backflow. After reducing the air pressure inside the second housing 4 to 0.7~0.9 standard atmospheres, the heating wire 8 is then energized. Heating occurs when the heat-resistant fan 9 drives the airflow through the heating wire 8 to quickly fill the entire interior of the insulation liner 5. The airflow then enters the third housing 11 along the first air duct 12 and flows back to the second housing 4 and the insulation liner 5 along the second air duct 13, forming an airflow circulation. The low-power heat-resistant fan 9 rotates at 0.3 rpm, producing a weak airflow that is insufficient to blow up the sample soil below when the airflow is slowly circulating. During the circulation, the water-absorbing resin rod 16 inside the external threaded tubular shell 15 continuously captures water molecules in the air. The external threaded tubular shell 15 can be unscrewed from the internal threaded socket 14. The water-absorbing resin rod 16 can be replaced by loosening and removing the internal threaded cap 17. The infrared temperature sensor 6 measures the material temperature in real time to prevent overheating from damaging the composition. The equipment is small in size and easy to carry to the construction site.
[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A portable drying device for testing the compaction degree of foundation soil, comprising a main shell (1), characterized in that: A PLC controller (2) is fixedly connected to the right side inside the main housing (1), a first housing (3) is fixedly connected to the left side of the PLC controller (2), a second housing (4) is fixedly connected to the left side inside the main housing (1), a handle (26) is fixedly connected to the top of the main housing (1), and a portable drying component is provided inside the second housing (4). The drying assembly includes a heat insulation liner (5). The heat insulation liner (5) is fixedly connected inside the second housing (4). An infrared temperature sensor (6) is fixedly installed at the middle position of the top of the heat insulation liner (5). A ventilation slot (7) is opened on the right side of the heat insulation liner (5). Multiple sets of heating wires (8) are fixedly installed between the upper and lower ends inside the ventilation slot (7). A heat-resistant fan (9) is fixedly installed on the right side of the heat insulation liner (5). A sealing door (10) is hinged to the front end of the second housing (4). The bottom end of the second housing (4) is fixed. A third housing (11) is connected. A first air duct (12) is provided on the left side of the top of the third housing (11). A second air duct (13) is provided on the right side of the top of the third housing (11). Multiple sets of internal threaded sockets (14) are fixedly connected to the left side of the third housing (11). An external threaded tubular shell (15) is inserted into the internal threaded socket (14) from left to right. A water-absorbing resin rod (16) is placed horizontally inside the external threaded tubular shell (15). An internal threaded cap (17) is threadedly connected to the left side of the external threaded tubular shell (15).
2. The drying device for portable testing of foundation soil compaction degree according to claim 1, characterized in that: The main shell (1) is 70cm long, 30cm wide and 60cm high. There is a distance between the right side of the heat insulation liner (5) and the right side inside the second shell (4). The ventilation groove (7) runs through the right side of the heat insulation liner (5).
3. The drying device for portable testing of foundation soil compaction degree according to claim 1, characterized in that: The interior of the heat insulation liner (5) and the third shell (11) are connected by the first air duct (12), and the interior of the second shell (4) and the third shell (11) are connected by the second air duct (13).
4. The drying device for portable testing of foundation soil compaction degree according to claim 1, characterized in that: The threads on the outside of the external threaded tubular shell (15) and the threads inside the internal threaded socket (14) are matched. The surface of the external threaded tubular shell (15) has multiple sets of holes. The PLC controller (2), infrared temperature sensor (6), heating wire (8), and heat-resistant fan (9) are electrically connected.
5. The drying device for portable testing of foundation soil compaction degree according to claim 1, characterized in that: A base support (18) is fixedly connected to the middle position of the bottom of the heat insulation liner (5). A support plate (19) is provided at the top of the outside of the base support (18). Weighing sensors (20) are fixedly installed at the four corners of the top of the base support (18). The shape and size of the bottom of the support plate (19) are adapted to the shape and size of the top of the base support (18). The base support (18) and the support plate (19) do not contact each other. The PLC controller (2) and the weighing sensors (20) are electrically connected.
6. The drying device for portable testing of foundation soil compaction degree according to claim 1, characterized in that: A miniature vacuum pump (25) is fixedly installed at the bottom inside the first housing (3). A pressure stabilizing tank (24) is fixedly connected to the right side inside the first housing (3). A solenoid valve (22) is fixedly connected to the left side inside the first housing (3). A connecting pipe (23) is fixedly connected between the solenoid valve (22) and the pressure stabilizing tank (24). An exhaust pipe (21) is fixedly connected between the heat insulation liner (5) and the solenoid valve (22). The interiors of the heat insulation liner (5) and the exhaust pipe (21) are connected. The top of the miniature vacuum pump (25) is connected to the bottom of the pressure stabilizing tank (24). The PLC controller (2), the solenoid valve (22), and the miniature vacuum pump (25) are electrically connected.