A sand filling detection device facilitating sand quantity recovery and accurate positioning

Abstract

The utility model discloses a kind of sand filling detection devices of convenient sanding recovery and accurate positioning, it is related to civil engineering detection technical field.The device includes sand hopper, sand filling cylinder, recycling bin and base plate.The sand hopper is connected with sand filling cylinder by silica gel sealing, its inner wall is equipped with volume scale line;The recycling bin bottom is equipped with stainless steel filter screen, and upper end is equipped with horn mouth;The base plate is equipped with center hole, and its outside is equipped with rotatable telescopic scale.The utility model prevents sanding leakage by sealing structure, realizes volume direct reading by integrated scale, realizes sanding on-site rapid recovery reuse by filter screen, and the rapid centering of test pit and size measurement are realized by base plate and scale component.The device effectively solves the problems of poor precision, low efficiency, large sanding loss and other problems existing in traditional sand filling method, significantly improves the accuracy and operation efficiency of compaction degree detection.

Description

Technical Field

[0001] This utility model relates to the field of earthwork engineering technology, and in particular to a sand filling detection device that facilitates sand measurement and recovery and precise positioning. Background Technology

[0002] The sand cone method, a core method for testing the compaction degree of geotechnical structures such as subgrades, base courses, and subbase courses, works by measuring the volume of the test pit and then calculating the dry density and compaction degree of the filling material. Due to its reliable results and wide applicability, this method is widely used in quality control for construction projects such as highways, railways, and water conservancy. Traditional sand cone testing devices typically consist of basic components such as a sand hopper, a sand filling cylinder, and a base plate, relying on manual labor for a series of operations including sand filling, weighing, and recovery. However, with the increasing demands for quality control and testing efficiency in engineering construction, traditional devices have gradually revealed numerous technical bottlenecks over long-term use, making it difficult to meet the modern engineering testing requirements for high precision, high efficiency, and environmental protection and energy conservation.

[0003] In existing technologies, sand filling testing devices typically employ simple mechanical structures with a lack of effective functional integration and optimization among components. Specifically, the sand hopper and filling cylinder are often connected by threads or snap-fit ​​connections, resulting in limited sealing performance. During the filling process, vibration or misalignment can easily cause sand leakage from the interface gaps, leading to material waste and introducing positive errors due to the actual amount of sand being filled being less than the theoretical value, severely affecting the accuracy of compaction calculations. Secondly, after testing, the sand and soil particles in the test pit are severely mixed, making recycling and reuse extremely difficult. Furthermore, the positioning and alignment of the test pit rely entirely on the operator's experience and visual inspection, making it easy for the center of the filling cylinder to deviate from the center of the test pit, resulting in "eccentric sand filling," which causes incomplete filling at the edges of the test pit and distorts the volume measurement results. Utility Model Content

[0004] The purpose of this invention is to provide a sand filling detection device that facilitates sand recovery and precise positioning, thereby overcoming the shortcomings of existing technologies.

[0005] To achieve the above objectives, a sand filling detection device is provided that facilitates sand collection and precise positioning, comprising: a sand hopper, a sand filling cylinder, a recovery chamber, and a base plate; the sand hopper and the sand filling cylinder are connected by a silicone seal, and the inner wall of the sand hopper is provided with volume scale lines; a filter screen is provided at the bottom of the recovery chamber; the base plate is provided with holes for alignment with the test pit, and a rotatable telescopic scale is provided on the outer side of the base plate;

[0006] The silicone sealing connection between the sand hopper and the sand filling cylinder is configured to prevent sand leakage and improve detection accuracy; the volume scale line is used to directly read the amount of sand poured into the test pit, replacing the traditional weighing step; the filter screen is configured to filter soil particles in the sand on site, enabling rapid sand recovery and reuse; the holes in the base plate and the rotatable telescopic scale work together to achieve precise positioning and centering of the test pit, avoiding measurement deviations caused by eccentric sand filling.

[0007] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, the minimum division value of the volume scale line is 10mL, and the volume scale line is marked on the inner wall of the sand hopper, which makes it easy to directly read the volume value during the sand filling process without the need to use a platform scale for weight conversion, thus simplifying the operation process.

[0008] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, the filter screen is a stainless steel filter screen with a screen aperture of 0.22mm. The filter screen is fixed at the bottom of the recovery bin and is adapted to 0.3-0.6mm standard sand. It is used for rapid on-site filtration of soil particles mixed in the sand. The filtered sand can be directly poured back into the sand hopper for reuse, reducing the sand recovery time from 15-20 minutes to less than 2 minutes.

[0009] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, the range of the rotatable telescopic scale is 0-30cm, and the minimum division value is 1mm; the rotatable telescopic scale is set on the outside of the base plate.

[0010] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, the holes in the substrate are used to ensure that the center of the sand filling cylinder is aligned with the center of the test pit; the substrate quickly aligns with the center of the test pit through a three-point positioning method, ensuring that the sand filling cylinder and the test pit are aligned, preventing insufficient filling of edge sand particles, and improving the accuracy of volume measurement.

[0011] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, a sand leakage switch is provided on the sand filling cylinder to control the flow of sand. The sand leakage switch can be closed after the sand surface stabilizes to precisely control the sand filling process, reduce operational errors, and achieve direct reading of the test pit volume in conjunction with the volume scale line.

[0012] According to the aforementioned sand filling detection device for easy sand recovery and precise positioning, a handle is installed on the outer wall of the sand filling cylinder to improve on-site portability; a tightening screw is provided on the front side wall of the base plate for fixing a rotatable telescopic scale.

[0013] According to the aforementioned sand-filling detection device for easy sand recovery and precise positioning, the upper end of the recovery chamber is equipped with a flared opening to facilitate the collection of sand; the flared opening is designed to expand the receiving area, making it convenient to shovel the sand left in the test pit into the recovery chamber, and quickly filter it through a filter screen to achieve a sand recovery rate of over 95%.

[0014] This utility model has the following beneficial effects:

[0015] 1. Compared with existing technologies, this utility model effectively solves the problems of sand leakage and cumbersome operation by using silicone sealing connection and integrated volume scale lines. The silicone sealing ring between the sand hopper and the sand filling cylinder completely eliminates leakage paths, ensuring the accuracy of sand volume. At the same time, the precise volume scale on the inner wall of the sand hopper enables direct reading of the sand filling volume, eliminating the traditional weighing conversion steps. This not only controls the compaction degree calculation error to within 1%, but also greatly simplifies the operation process and improves detection efficiency and reliability.

[0016] 2. This utility model overcomes the technical difficulties of long recovery time and high losses in sand collection through an integrated filtration and recovery design. A stainless steel filter screen with a specific aperture is fixed at the bottom of the recovery chamber, forming an efficient recovery path with the sand hopper and funnel-shaped opening, enabling rapid on-site filtration and direct reuse of mixed sand. This design reduces the single recovery time from 15-20 minutes to less than 2 minutes and increases the recovery rate to over 95%, significantly saving time and material costs.

[0017] 3. This utility model achieves rapid and accurate positioning and measurement of test pits through an innovative base plate and integrated scale structure. The base plate with a central hole ensures precise alignment between the sand-filling cylinder and the test pit, avoiding errors caused by eccentric sand filling; the rotatable and telescopic scale integrated into the base plate can directly measure the dimensions of the test pit. This component integrates positioning, alignment, and measurement functions, fundamentally ensuring the geometric accuracy of volume measurement, reducing the use of additional tools, and improving the standardization of operations. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the structure of a sand filling detection device that facilitates sand recovery and precise positioning according to the present invention.

[0020] Figure 2 This is a schematic diagram of the substrate structure in a sand filling detection device for easy sand recovery and precise positioning according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the sand filling cylinder in the sand filling detection device of this utility model, which facilitates sand recovery and precise positioning.

[0022] Figure 4 This is a schematic diagram of the recovery chamber in a sand filling detection device that facilitates sand recovery and precise positioning according to this utility model.

[0023] Legend:

[0024] 1. Sand hopper; 2. Sand filling cylinder; 3. Handle; 4. Tightening screw; 5. Rotatable telescopic scale; 6. Base plate; 7. Sand leakage switch; 8. Scale lines (10ml per division); 9. Recycling bin; 901. Trumpet mouth; 902. Filter screen. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] Reference Figure 1-4 This utility model discloses a sand filling detection device that facilitates sand recovery and precise positioning. It includes main components such as a sand hopper 1, a sand filling cylinder 2, a recovery chamber 9, and a base plate 6. The sand hopper 1 and the sand filling cylinder 2 are sealed together by a silicone sealing ring, effectively preventing sand leakage from the interface during the filling process. The inner wall of the sand hopper 1 is provided with volume graduation lines 8, with a minimum graduation of 10 mL, facilitating direct reading of the sand volume during filling, replacing the traditional weighing step and improving detection efficiency.

[0027] A sand-filling cylinder 2 is equipped with a sand leakage switch 7 at its upper part to control the sand flow; a handle 3 is installed on the outside of the cylinder for easy operation and handling. A circular hole is located in the center of the base plate 6 for alignment with the test pit, ensuring that the sand-filling cylinder 2 is centered with the test pit. A rotatable telescopic scale 5 is installed on the outside of the base plate 6, with a measuring range of 0-30cm and a minimum division of 1mm, which can be used to measure the diameter and depth of the test pit. The scale is fixed to the base plate 6 by a tightening screw 4, allowing for convenient adjustment and reliable positioning.

[0028] The upper part of the recovery bin 9 has a funnel-shaped structure 901, which facilitates the reception of mixed sand recovered from the test pit; the bottom is fixed with a stainless steel filter screen 902 with a screen aperture of 0.22mm, suitable for filtering standard sand of 0.3-0.6mm. The recovery bin 9 can be placed above the sand hopper 1 to realize on-site filtration and direct reuse of the sand.

[0029] Working principle:

[0030] 1. Test pit positioning and device calibration: After digging the test pit, place the base plate 6 horizontally on the ground. Accurately measure the diameter and depth of the test pit using the rotatable telescopic scale 5 on the outside of the base plate 6 to ensure the pit dimensions meet specifications, such as a diameter of 150mm and a depth of 150mm. Then, move the base plate 6 so that its central hole completely coincides with the test pit. This design achieves a three-point positioning effect, ensuring that the central axis of the sand-filling cylinder 2 is strictly aligned with the central axis of the test pit, fundamentally avoiding the problem of insufficient filling at the edge of the test pit due to eccentric sand filling, and laying the foundation for accurate volume measurement.

[0031] 2. Sand Filling and Control: Fill the sand hopper 1 with standard measured sand (e.g., 5000 mL). Since the sand hopper 1 and the sand filling cylinder 2 are sealed with silicone, leakage of the measured sand from the connection point is effectively prevented during filling and settling. Open the sand leakage switch 7 on the sand filling cylinder 2, and the measured sand flows into the test pit under gravity. Once the sand surface is completely stable and no longer sinking, the operator closes the sand leakage switch 7, thus precisely controlling the end point of the sand filling process.

[0032] 3. Volume Reading and Sand Recovery: After sand filling, there is no need to transfer or weigh the sand. Operators can directly read the volume of sand consumed through the volume scale line 8 marked on the inner wall of the sand hopper 1. The smallest division of this scale line is 10mL, and the reading is intuitive. This volume is the volume of the test pit. This step eliminates the tedious weighing and conversion in the traditional method, simplifies the operation, and avoids additional errors caused by weighing equipment. After reading the volume, remove the combination of base plate 6 and sand filling cylinder 2. Place the recovery chamber 9 above the sand hopper 1. Use a shovel to shovel the sand mixed with soil particles remaining in the test pit into the recovery chamber through the funnel opening 901 at the top of the recovery chamber 9. When the mixed sand passes through the stainless steel filter screen 902 with a pore size of 0.22mm fixed at the bottom of the recovery chamber, the fine soil particles are screened out, and the clean standard sand falls into the sand hopper 1 below, realizing on-site instant filtration and recovery. This process reduces the sand recovery time from the traditional 15-20 minutes to less than 2 minutes, and increases the recovery rate to over 95%.

[0033] 4. Compaction degree calculation: Combining the weight of the soil sample and the moisture content of the soil sample excavated from the test pit, the compaction degree is calculated by substituting into the formula. This is consistent with the traditional method. However, because there is no leakage of sand and the volume measurement is accurate, the calculation error can be reduced to less than 1%.

[0034] Unless otherwise specified, the constituent units of this utility model are obtained from conventional commercial channels or manufactured by conventional methods. Their specific structure, working principle, and possible control methods and spatial arrangement methods can adopt conventional choices in the field and should not be regarded as the innovation of this utility model. This is understandable to those skilled in the art, and this utility model patent will not be further elaborated in detail.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A sand-filling detection device that facilitates sand recovery and precise positioning, characterized in that, include: The sand hopper (1), sand filling cylinder (2), recovery bin (9), and base plate (6) are provided. The sand hopper (1) and sand filling cylinder (2) are connected by silicone sealant. The inner wall of the sand hopper (1) is provided with volume scale lines (8). The bottom of the recovery bin (9) is provided with a filter screen (902). The base plate (6) is provided with holes for alignment with the test pit. The outer side of the base plate (6) is provided with a rotatable telescopic scale (5).

2. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, The minimum division value of the volume scale line (8) is 10 mL, and the volume scale line (8) is marked on the inner wall of the sand hopper (1).

3. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, The filter screen (902) is a stainless steel filter screen with a screen hole diameter of 0.22mm. The filter screen (902) is fixed at the bottom of the recycling bin (9) and is suitable for 0.3-0.6mm standard sand.

4. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, The rotatable telescopic scale (5) has a measuring range of 0-30cm and a minimum graduation of 1mm; the rotatable telescopic scale (5) is located on the outside of the base plate (6).

5. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, The holes in the substrate (6) are used to ensure that the center of the sand filling cylinder (2) is aligned with the center of the test pit; the substrate (6) is quickly aligned with the center of the test pit by a three-point positioning method.

6. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, A sand leakage switch (7) is installed on the sand filling cylinder (2).

7. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, A handle (3) is installed on the outer side wall of the sand filling cylinder (2); a tightening screw (4) for fixing a rotatable telescopic ruler (5) is provided on the front side wall of the base plate (6).

8. The sand filling detection device for easy sand recovery and precise positioning according to claim 1, characterized in that, The upper end of the recycling bin (9) is equipped with a flared opening (901).

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