A device for measuring the moisture content of backfill material

Abstract

This utility model discloses a backfill material moisture content measuring device, relating to the field of soil moisture content detection technology. It includes a weighing scale, a material holding assembly, and a drying assembly. The material holding assembly includes a material holding cylinder and multiple sets of material separators. The material separators are arranged radially at intervals along the material holding cylinder to divide the interior of the cylinder into multiple material holding cavities. The drying assembly includes a heating element and an exhaust pipe. The exhaust pipe is equipped with an exhaust component, which communicates with the material holding cavities. The exhaust component rotates under external force to expel air from the interior of the material holding assembly. By setting up a material holding cylinder to hold the soil to be tested, and dividing the interior of the material holding cylinder into multiple material holding cavities under the action of the material separators, the soil is separated, reducing the thickness of the accumulated soil. This facilitates rapid heat transfer to the interior of the soil, accelerates soil heating, accelerates the evaporation of moisture from the soil, and, under the action of the exhaust component, discharges the evaporated moisture from the material holding cylinder, preventing moisture retention in the cylinder and improving the drying rate of the soil.

Description

Technical Field

[0001] This utility model relates to the field of soil moisture content detection technology, specifically to a backfill material moisture content measuring device. Background Technology

[0002] The moisture content of soil refers to the ratio of the mass of water in the soil to the mass of soil particles. Specifically, it's the ratio of the mass of water lost when a soil sample is dried to constant weight at 105–110°C to the mass of the dry soil, expressed as a percentage. Moisture content has a significant impact on the engineering properties of cohesive soils, such as soil state, shear strength, and consolidation deformation. Determining the moisture content of soil to understand its water content is also an essential basic indicator for calculating the void ratio, liquid index, saturation, and other physical and mechanical properties. Currently, commonly used methods in engineering include the drying method and the alcohol combustion method. The drying method is mostly used in laboratory settings, while the alcohol combustion method is used for rapid on-site testing of soil sample moisture content. However, the alcohol combustion method has a relatively large margin of error; for more accurate moisture content determination, the drying method is generally preferred.

[0003] Utility model patent CN206177744U discloses a portable aggregate moisture content analyzer, including a weighing device, a ceramic sample pan, and a heating device. The bottom of the weighing device is fixedly connected to a lower base plate, which is located within a lower base plate frame. The lower end face of the lower base plate is lower than the lower end face of the lower base plate frame. An upper protective frame is provided at the top of the heating device. The inner diameter of the upper protective frame is larger than the inner diameter of the lower base plate frame. First side plates are foldably connected to the left and right sides of the lower base plate frame, and second side plates are foldably connected to the front and rear sides of the upper protective frame. The length of the second side plates is greater than the length of the first side plates. Magnets are respectively provided on the upper end face, both end faces of the first side plates, and the upper end face of the second side plates. The top of the frame is foldably connected to an upper protective plate, which is L-shaped. The vertical end of the upper protective plate has a downward-facing folded edge, and a fixing rod is provided at the folded edge end. The fixing rod consists of two round rods that are rotatably connected. The two round rods together form a "⊥" shape. The front end of the upper protective plate frame has a longitudinally arranged connecting hole. The left and right ends of the outer shell of the heating device are respectively provided with grooves, and the lower end of the grooves is spring-loaded with a handle nose. In this patent, the soil is heated by the heating device to evaporate the moisture in the soil. However, during the heating process, the soil is piled up together, and the piled soil layer is relatively thick. This results in a long heating time inside the soil and a slow moisture evaporation rate, which is not conducive to quickly drying the soil and measuring its moisture content. Utility Model Content

[0004] The main purpose of this invention is to provide a backfill material moisture content measuring device to solve the problems of long heating time and slow moisture evaporation rate of existing soil moisture content measuring devices during the drying process.

[0005] To achieve the above objectives, this utility model provides a device for determining the moisture content of backfill material, including a weighing scale, and further comprising:

[0006] The material holding assembly includes a material holding cylinder placed on a weighing scale and multiple sets of material separating components disposed inside the material holding cylinder; the material separating components are arranged at radial intervals along the material holding cylinder to divide the interior of the material holding cylinder into multiple sets of material holding cavities;

[0007] The drying assembly includes a heating element disposed inside a material separator and an exhaust pipe disposed inside a material container; the exhaust pipe is provided with an exhaust component and is connected to the material container cavity; the exhaust component rotates under the action of an external force to expel air from inside the material container.

[0008] As a further improvement of this utility model, the material separator includes a material separator plate; the material separator plate has a material passage in the middle, and the outer diameter of the material separator plate increases from the material passage to the edge.

[0009] As a further improvement of this utility model, the partition plate is hollow to form a heating chamber, and the inner wall of the partition plate is provided with an air guide hole that communicates with the heating chamber.

[0010] As a further improvement of this utility model, the outer wall of the material container is provided with a discharge port that communicates with the material container cavity; the discharge port is provided with a discharge valve.

[0011] As a further improvement of this utility model, the heating element includes a heating wire disposed in the heating chamber; a temperature controller is externally connected to the heating wire; the exhaust pipe is located near the material passage of the material separator plate, and an exhaust hole is provided on the exhaust pipe.

[0012] As a further improvement of this utility model, the exhaust component includes an exhaust fan; the exhaust fan is located at the top of the material container and is connected to the exhaust pipe.

[0013] The beneficial effects of this utility model are reflected in:

[0014] By setting up a material container to hold the soil to be tested, and with the help of a material separator, the inside of the material container is divided into multiple material chambers, thereby separating the soil, reducing the thickness of the soil after accumulation, facilitating the rapid transfer of heat to the soil, accelerating the heating of the soil, accelerating the evaporation of moisture inside the soil, and with the help of an exhaust device, the evaporated moisture is discharged from the material container, preventing moisture from remaining in the material container and improving the drying rate of the soil. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a backfill moisture content measuring device according to the present invention;

[0016] Figure 2This is a schematic diagram of the internal structure of a backfill moisture content measuring device according to the present invention;

[0017] Figure 3 This is a schematic diagram of the material separator structure of a backfill moisture content measuring device according to the present invention;

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Weighing scale; 2. Material container; 3. Material separator; 301. Material separator plate; 302. Material passage; 4. Material container cavity; 5. Heating element; 501. Heating wire; 502. Temperature controller; 503. Temperature sensor; 6. Exhaust pipe; 7. Exhaust device; 8. Heating cavity; 9. Air vent; 10. Discharge port; 11. Discharge valve; 12. Slot; 13. Exhaust hole; 14. Cover; 15. Inlet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] In one embodiment, see Figure 1 , 2 The present invention relates to a backfill material moisture content measuring device, comprising a weighing scale 1, a material holding assembly, and a material drying assembly.

[0022] The material holding assembly includes a material holding cylinder 2 placed on a weighing scale and multiple sets of material separating members 3 disposed inside the material holding cylinder 2. The material separating members 3 are arranged radially at intervals along the material holding cylinder 2 to divide the interior of the material holding cylinder 2 into multiple sets of material holding cavities 4. The material drying assembly includes a heating element 5 disposed inside the material separating members 3 and an exhaust pipe 6 disposed inside the material holding cylinder 2. The exhaust pipe 6 is provided with an exhaust member 7. The exhaust pipe 6 is connected to the material holding cavity 4. The exhaust member 7 rotates under the action of external force to expel the air inside the material holding member.

[0023] When determining the moisture content of soil using the drying method, the soil is piled up, resulting in a large thickness. This makes it difficult for external heat sources to quickly penetrate the soil, leading to a long heating time and slow moisture evaporation. The aforementioned material separator 3 divides the container cylinder 2 into multiple containers 4, storing the soil in the containers 4. This reduces the thickness of the soil. A heating element 5 is installed inside the material separator 3 to provide a heat source for heating the soil. This results in rapid heating of the soil within a unit of time and rapid moisture evaporation. Simultaneously, as the exhaust element 7 expels air from the container, a negative pressure is generated inside the container, carrying away the evaporated moisture from the container cylinder 2. This prevents moisture from lingering in the container cylinder 2, thereby accelerating the drying rate of the soil.

[0024] Further, see Figure 2 , 3 The material separator 3 includes a material separator plate 301, and a material passage 302 is provided in the middle of the material separator plate 301. The outer diameter of the material separator plate 301 increases from the material passage 302 to the edge.

[0025] Preferably, the material separator 301 is a conical structure with a larger opening at the top and a smaller opening at the bottom, with the larger opening of the material separator 301 facing the bottom of the material container 2.

[0026] Preferably, the material container 2 is provided with a cover 14 connected to the material separator 301, and the cover 14 is provided with a feed inlet 15.

[0027] In the above setup, the soil is poured into the holding cylinder 2 through the material passage 302. The soil enters the holding chamber 4 along the material passage 302. Under the action of the partition plate 301, the soil is divided into multiple parts, which reduces the thickness of the soil and facilitates heat transfer. The conical structure of the partition plate 301 facilitates the upward movement of the water evaporated after heating. The material passage 302 at the bottom of the partition plate is closed so that the soil will not fall into the bottom of the holding cylinder 2.

[0028] Further, see Figure 3 The partition plate 301 has a hollow interior forming a heating chamber 8, and the inner wall of the partition plate 301 is provided with an air guide hole 9 that communicates with the heating chamber 8.

[0029] Preferably, connecting posts are provided between the partition plates 301 to connect multiple sets of partition plates 301 to each other.

[0030] Preferably, the outer edge of the partition plate 301 is fitted with the material container 2 with a clearance.

[0031] Further, see Figure 1 The outer wall of the material container 2 is provided with a discharge port 10 that communicates with the material container 4, and the discharge port 10 is provided with a discharge valve 11.

[0032] Preferably, the discharge port 10 is located at the bottom of the material container 2. The outer edge of the discharge port 10 is provided with a "U"-shaped groove 12. The discharge valve 11 is a rectangular plate. The discharge valve 11 is inserted into the groove 12 to close the discharge port 10, so that the bottom of the material container 2 is closed for holding soil.

[0033] In the above setup, after the soil is dried and its weight is obtained, the material separator 301 is pulled out of the material container 2 as a whole, which will take out some of the soil. The remaining soil can be discharged from the discharge port 10 by opening the discharge valve 11, or the material container 2 can be turned over and poured out directly, so that the moisture content of the soil can be measured later.

[0034] In one embodiment, see Figure 1 , 2 The heating element 5 includes a heating wire 501 disposed in the heating chamber 8. A temperature controller 502 is connected to the outside of the heating wire 501. The exhaust pipe 6 is located near the material passage 302 of the material separator 301. The exhaust pipe 6 is provided with an exhaust hole 13.

[0035] Preferably, the heating wire 501 is installed in a disc shape inside the heating chamber 8. The temperature controller 502 adopts an existing structure to control the heating temperature of the heating wire 501. A temperature sensor 503 is installed inside the heating chamber 8 to monitor the temperature inside the heating chamber 8 and ensure that the temperature inside the heating chamber 8 is controlled between 105 and 110°C, thereby ensuring the drying temperature. The combination of the temperature controller 502, the temperature sensor 503, and the heating wire 501 is a common structure in the prior art. This application does not propose any improvement to its structure, connection method, or working principle; the existing structure can be used.

[0036] Further, see Figure 1 The exhaust component 7 includes an exhaust fan, which is located at the top of the material container 2 and is connected to the exhaust pipe 6.

[0037] Preferably, the top of the exhaust pipe 6 extends beyond the baffle plate 301, and the exhaust fan is located at the top of the exhaust pipe 6.

[0038] In the above configuration, when the exhaust fan is working, the water vapor in the exhaust pipe 6 is extracted to prevent the water vapor from lingering in the material holding chamber 4 and to accelerate the dissipation of water vapor to the outside, thereby accelerating the drying of the soil.

[0039] In this embodiment, the material container 2 is placed on the weighing scale 1 for tare. Soil is added to the material container 4 through the uppermost material passage 302. The soil enters the multi-layered material container 4 through the material passage 302. After one layer of material container 4 is filled with soil, the soil accumulates into the empty material container 4. During the filling process, the material container 2 can be shaken to allow soil to enter the material container 4, reducing the gaps within the material container 4. After the soil is filled, the material container 2 is placed on the weighing scale 1 for weighing. After tare, the net weight A of the soil is obtained. The heating wire 50 is then connected. 1. When the exhaust fan is powered on, the heating wire 501 generates heat, which is transferred to the material holding chamber 4 and then to the soil. The heat evaporates the moisture in the soil and it enters the heating chamber 8. Under the suction of the exhaust fan, the moisture is discharged from the material holding cylinder 2 through the exhaust hole 13 and the exhaust pipe 6, thereby accelerating the heating of the soil and accelerating the discharge of moisture from the material holding cylinder 2, thus improving the drying rate of the soil. After the weight on the weighing scale 1 is constant, the net weight B of the dried soil is obtained. The moisture weight C is calculated based on the difference between A and B. The ratio of the moisture weight C to the net weight B of the soil is the moisture content.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A backfill material water content measuring device comprising a weighing scale (1), characterized in that, Also includes: The material holding assembly includes a material holding cylinder (2) placed on a weighing scale and multiple sets of material separating members (3) disposed inside the material holding cylinder (2); the material separating members (3) are arranged at radial intervals along the material holding cylinder (2) to divide the interior of the material holding cylinder (2) into multiple sets of material holding cavities (4); The drying assembly includes a heating element (5) disposed inside the material separator (3) and an exhaust pipe (6) disposed inside the material container (2); the exhaust pipe (6) is provided with an exhaust component (7), and the exhaust pipe (6) is connected to the material container (4); the exhaust component (7) rotates under the action of external force to discharge the air inside the material container.

2. An apparatus for determining the water content of a backfill material as defined in claim 1, wherein: The material separator (3) includes a material separator plate (301); the material separator plate (301) has a material passage channel (302) in the middle, and the outer diameter of the material separator plate (301) increases from the material passage channel (302) to the edge.

3. The device for determining the moisture content of backfill material according to claim 2, characterized in that: The partition plate (301) has a hollow interior forming a heating chamber (8), and the inner wall of the partition plate (301) is provided with an air guide hole (9) that communicates with the heating chamber (8).

4. The device for determining the moisture content of backfill material according to claim 3, characterized in that: The outer wall of the material container (2) is provided with a discharge port (10) that communicates with the material container (4); the discharge port (10) is provided with a discharge valve (11).

5. An apparatus for determining the water content of a backfill material as defined in claim 4, wherein: The heating element (5) includes a heating wire (501) disposed in the heating chamber (8); a temperature controller (502) is connected to the outside of the heating wire (501); the exhaust pipe (6) is located near the material passage (302) of the partition plate (301), and an exhaust hole (13) is provided on the exhaust pipe (6).

6. An apparatus for determining the water content of a backfill material as defined in claim 5, wherein: The exhaust component (7) includes an exhaust fan; the exhaust fan is located at the top of the material container (2) and is connected to the exhaust pipe (6).

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