Soil pollution sampling device

Abstract

The utility model belongs to the technical field of soil sampling, and particularly relates to a soil pollution sampling device which comprises an outer collecting cylinder, the bottom end of the outer collecting cylinder is fixedly connected with an inward shrinkage connecting ring, the bottom end of the inward shrinkage connecting ring is fixedly connected with an extrusion cutting edge ring, and the inner diameter of the extrusion cutting edge ring is smaller than that of the outer collecting cylinder. A surface layer cutting cylinder is detachably connected in the outer collecting cylinder, the diameter of the surface layer cutting cylinder is smaller than the inner diameter of the extrusion cutting blade ring, a cutting blade ring is fixedly connected to the bottom end of the surface layer cutting cylinder, the cutting blade ring corresponds to the position of the inner shrinkage connecting ring, and a pedal is fixedly connected to the side wall of the outer collecting cylinder. By means of variable-diameter connection of the inner shrinkage connecting ring, soil is extruded and cut through the extrusion cutting blade ring, so that space allowance is reserved between a mud column entering the outer collecting cylinder and the inner wall of the outer collecting cylinder, and the outer collecting cylinder is further matched with the surface layer cutting cylinder to conveniently cut the surface layer of the mud column.

Description

Technical Field

[0001] This utility model belongs to the field of soil sampling technology, specifically relating to a soil pollution sampling device. Background Technology

[0002] When testing for soil pollution, soil sampling devices are first used to collect samples. When testing for heavy metal pollution in soil, since the metal sampling tools are in direct contact with the soil sample, friction between the metal tools and the soil sample during sampling can introduce additional metal components from the metal tools into the soil sample, affecting the heavy metal test results. Therefore, non-metallic tools such as wooden or plastic tools are needed to complete the final sampling. However, due to limitations in the strength and sharpness of wooden or plastic tools, the current practice is to cut the soil with metal tools to complete the initial sampling, and then use wooden or plastic tools to remove the surface layer of the initially sampled soil. This is not only cumbersome, but also carries the risk of missing parts of the contact area between the metal tools and the soil due to staff error. Utility Model Content

[0003] This invention provides a soil pollution sampling device that can collect soil in one operation and remove the part of the mud column that is in contact with metal, thereby improving the accuracy of soil sampling.

[0004] This utility model provides the following technical solution: a soil pollution sampling device, including an outer sampling tube, an inner retractable connecting ring fixedly connected to the bottom end of the outer sampling tube, a compression cutting blade ring fixedly connected to the bottom end of the inner retractable connecting ring, the inner diameter of the compression cutting blade ring being smaller than the inner diameter of the outer sampling tube, a surface cutting tube detachably connected inside the outer sampling tube, the diameter of the surface cutting tube being smaller than the inner diameter of the compression cutting blade ring, a cutting blade ring fixedly connected to the bottom end of the surface cutting tube, the cutting blade ring being positioned corresponding to the inner retractable connecting ring, and a foot pedal fixedly connected to the side wall of the outer sampling tube.

[0005] The thickness of the bottom end of the inward connecting ring is greater than the thickness of the top end of the inward connecting ring, the outer wall of the extrusion cutting blade ring is outwardly sloping, and the length of the extrusion cutting blade ring is not less than two centimeters.

[0006] The outer collection cylinder is fixedly connected to an extension connecting ring at its top end, and the inner wall of the extension connecting ring is fixedly connected to a threaded inner ring.

[0007] The inner wall of the outer collection cylinder is fixedly connected with several evenly distributed reinforcing ribs.

[0008] The top end of the surface removal cylinder is fixedly connected to a threaded connecting sleeve, which is threadedly connected to the inner thread ring.

[0009] The threaded connecting sleeve has a limiting ring fixedly connected to its outer wall, and the diameter of the limiting ring is larger than the inner diameter of the extension connecting ring.

[0010] The pedal has a grip bar fixedly connected to its top.

[0011] The beneficial effects of this utility model are: by using the variable diameter connection of the inner connecting ring, combined with the squeezing and cutting of the soil by the extrusion cutting blade ring, a space margin is left between the mud column entering the outer collection cylinder and the inner wall of the outer collection cylinder. Furthermore, in conjunction with the surface removal cylinder, the surface of the mud column can be easily cut. The device can complete the collection of soil in one operation and remove the part of the mud column surface that is in contact with the metal, thereby improving the accuracy of soil sampling.

[0012] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the outer collection tube and the inner retractable connecting ring in this utility model;

[0015] Figure 3 This is a schematic diagram of the surface removal cylinder in this utility model;

[0016] Figure 4 This is a cross-sectional view of the outer collecting cylinder and the inner retractable connecting ring in this utility model.

[0017] In the diagram: 1. Outer collection cylinder; 11. Extension connecting ring; 12. Threaded inner ring; 13. Reinforcing rib; 2. Inner retraction connecting ring; 21. Extrusion cutting blade ring; 3. Surface removal cylinder; 31. Removal blade ring; 32. Threaded connecting sleeve; 33. Limiting ring; 4. Foot pedal; 41. Holding rod. Detailed Implementation

[0018] Please see Figures 1-4 The present invention provides the following technical solution: a soil pollution sampling device, including an outer sampling cylinder 1, an inner retractable connecting ring 2 fixedly connected to the bottom end of the outer sampling cylinder 1, a compression cutting blade ring 21 fixedly connected to the bottom end of the inner retractable connecting ring 2, the inner diameter of the compression cutting blade ring 21 being smaller than the inner diameter of the outer sampling cylinder 1, a surface cutting cylinder 3 detachably connected inside the outer sampling cylinder 1, the diameter of the surface cutting cylinder 3 being smaller than the inner diameter of the compression cutting blade ring 21, a cutting blade ring 31 fixedly connected to the bottom end of the surface cutting cylinder 3, the cutting blade ring 31 being positioned corresponding to the inner retractable connecting ring 2, and a foot pedal 4 fixedly connected to the side wall of the outer sampling cylinder 1.

[0019] In this implementation plan: When sampling soil contaminated with heavy metals, the staff first inserts the surface cutting tube 3 into the outer sampling tube 1, and threads the inner threaded ring 12 to the threaded connecting sleeve 32 until the limiting ring 33 abuts against the top of the extension connecting ring 11. Then, the staff steps on the pedal 4 to vertically insert the extrusion cutting blade ring 21 into the soil at the sampling point. During the process, the extrusion cutting blade ring 21 extrudes and cuts the soil. As the extrusion cutting blade ring 21 is gradually inserted into the soil, the mud column cut by the extrusion cutting blade ring 21 enters... At the corresponding positions of the inner retractable connecting ring 2 and the outer collection cylinder 1, the diameter of the mud column is larger than the diameter of the cutting blade ring 31. After the mud column contacts the cutting blade ring 31, it is cut again by the cutting blade ring 31. The surface soil in contact with the extrusion cutting blade ring 21 is cut off, and the remaining mud column enters the surface cutting cylinder 3 and the cutting blade ring 31. During the process, with the help of the top expansion structure of the inner retractable connecting ring 2, the inner diameter of the outer collection cylinder 1 is larger than the diameter of the mud column, leaving space on the outside of the mud column. When the cutting blade ring 31 cuts the mud column, the cut surface soil is cut off. The soil layer is not subjected to bidirectional compression from both inside and outside, and the thin layer of soil removed by cutting makes it easier to cut away. During cutting, the surface cutting cylinder 3 experiences less resistance, thus reducing the strength requirements for the surface cutting cylinder 3. Subsequently, the workers remove the surface cutting cylinder 3 from the outer collection cylinder 1 and remove the soil inside the surface cutting cylinder 3. The mud column located within the compression cutting blade ring 21 is limited by the compression cutting blade ring 21. The position of the cutting blade ring 31 corresponds to the position of the inward connecting ring 2, so that the cutting blade ring 31 is positioned relative to the surface of the mud column. When cutting the layer, the distance of the unrestricted outer side of the mud column can be shortened, thereby preventing the mud column from being squeezed and loosened when cutting the surface layer of the mud column. The inner connecting ring 2, the extrusion cutting blade ring 21, the outer collection cylinder 1, and the reinforcing rib 13 are made of high-hardness metal materials, and they can withstand greater force and resistance when directly inserted into the ground to cut the soil. The surface cutting cylinder 3 is made of plastic, and the mud column entering the surface cutting cylinder 3 will not come into contact with the metal material, thereby preventing the metal components of the tool itself from being rubbed off and mixed into the soil sample during the sampling process.

[0020] The thickness of the bottom end of the inner connecting ring 2 is greater than the thickness of the top end of the inner connecting ring 2. The outer wall of the extrusion cutting blade ring 21 is outwardly sloping, and the length of the extrusion cutting blade ring 21 is not less than two centimeters. The inner wall of the inner connecting ring 2 is sloping so that the inner diameter of the outer collection cylinder 1 can be greater than the inner diameter of the extrusion cutting blade ring 21, so as to reserve space on the outside of the mud column and avoid the inner wall of the outer collection cylinder 1 from squeezing the soil. When the outer wall of the extrusion cutting blade ring 21 is sloping, it will simultaneously squeeze the outer soil outward when cutting the ground soil. The longer blade length can increase the path length for squeezing the soil, making it easier for personnel to insert the extrusion cutting blade ring 21 into the ground.

[0021] An extension connecting ring 11 is fixedly connected to the top of the outer collection cylinder 1, and a threaded inner ring 12 is fixedly connected to the inner wall of the extension connecting ring 11. By setting the extension connecting ring 11, it can extend inward so that the outer collection cylinder 1 with a larger diameter can be connected to the threaded connecting sleeve 32 with a smaller diameter. By setting the threaded inner ring 12, it is easy to connect the extension connecting ring 11 and the threaded connecting sleeve 32.

[0022] The inner wall of the outer sampling cylinder 1 is fixedly connected with several evenly distributed reinforcing ribs 13; by setting the reinforcing ribs 13, the strength of the outer sampling cylinder 1 to withstand vertical pressure can be increased.

[0023] A threaded connecting sleeve 32 is fixedly connected to the top of the surface cutting cylinder 3. The threaded connecting sleeve 32 is threadedly connected to the inner threaded ring 12. By setting the threaded connecting sleeve 32, it is easy to connect with the inner threaded ring 12 and limit the surface cutting cylinder 3, so that the cutting blade ring 31 can cut the mud column that enters the inner retracting connecting ring 2.

[0024] A limiting ring 33 is fixedly connected to the outer wall of the threaded connecting sleeve 32. The diameter of the limiting ring 33 is larger than the inner diameter of the extension connecting ring 11. By setting the limiting ring 33, the surface cutting cylinder 3 can be positioned so that the cutting blade ring 31 can be installed at the position corresponding to the inner retracting connecting ring 2.

[0025] A grip bar 41 is fixedly connected to the top of the pedal 4; the grip bar 41 makes it easy for the staff to hold.

[0026] The working principle and usage process of this utility model are as follows: First, the operator inserts the surface cutting cylinder 3 into the outer collection cylinder 1 and connects the inner threaded ring 12 with the threaded connecting sleeve 32 until the limiting ring 33 abuts against the top of the extension connecting ring 11. Then, the operator steps on the pedal 4 to vertically insert the extrusion cutting blade ring 21 into the soil at the sampling point. During the process, the extrusion cutting blade ring 21 extrudes and cuts the soil. As the extrusion cutting blade ring 21 is gradually inserted into the soil, the mud column cut by the extrusion cutting blade ring 21 enters the corresponding position of the inner connecting ring 2 and the outer collection cylinder 1. After the mud column contacts the cutting blade ring 31, it is cut again by the cutting blade ring 31. The surface soil in contact with the extrusion cutting blade ring 21 is cut off, and the remaining mud column enters the surface cutting cylinder 3 and the cutting blade ring 31. Then, the operator removes the surface cutting cylinder 3 from the outer collection cylinder 1 and takes out the soil inside the surface cutting cylinder 3.

Claims

1. A soil pollution sampling device, characterized in that: The device includes an outer collection cylinder (1), an inner retractable connecting ring (2) fixedly connected to the bottom end of the outer collection cylinder (1), an extrusion cutting blade ring (21) fixedly connected to the bottom end of the inner retractable connecting ring (2), the inner diameter of the extrusion cutting blade ring (21) being smaller than the inner diameter of the outer collection cylinder (1), a surface excision cylinder (3) detachably connected inside the outer collection cylinder (1), the diameter of the surface excision cylinder (3) being smaller than the inner diameter of the extrusion cutting blade ring (21), an excision blade ring (31) fixedly connected to the bottom end of the surface excision cylinder (3), the excision blade ring (31) being positioned corresponding to the inner retractable connecting ring (2), and a foot pedal (4) fixedly connected to the side wall of the outer collection cylinder (1).

2. The soil pollution sampling device according to claim 1, characterized in that: The thickness of the bottom end of the inner shrinking connecting ring (2) is greater than the thickness of the top end of the inner shrinking connecting ring (2), the outer wall of the extrusion cutting blade ring (21) is outwardly expanded and inclined, and the length of the extrusion cutting blade ring (21) is not less than two centimeters.

3. The soil pollution sampling device according to claim 1, characterized in that: An extension connecting ring (11) is fixedly connected to the top of the outer collection cylinder (1), and a threaded inner ring (12) is fixedly connected to the inner wall of the extension connecting ring (11).

4. A soil pollution sampling device according to claim 1, characterized in that: The inner wall of the outer collection cylinder (1) is fixedly connected with several evenly distributed reinforcing ribs (13).

5. A soil pollution sampling device according to claim 3, characterized in that: The top end of the surface cutting tube (3) is fixedly connected to a threaded connecting sleeve (32), and the threaded connecting sleeve (32) is threadedly connected to the inner threaded ring (12).

6. A soil pollution sampling device according to claim 5, characterized in that: A limiting ring (33) is fixedly connected to the outer wall of the threaded connecting sleeve (32), and the diameter of the limiting ring (33) is larger than the inner diameter of the extension connecting ring (11).

7. A soil pollution sampling device according to claim 1, characterized in that: A grip bar (41) is fixedly connected to the top of the pedal (4).

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