Sampling device for soil heavy metal detection

Abstract

A sampling device for soil heavy metal detection comprises a vertically arranged sampling outer cylinder and a sampling inner cylinder inserted in the sampling outer cylinder, the lower end of the sampling outer cylinder is detachably connected with a soil piercing sleeve, the soil piercing sleeve is communicated with the sampling inner cylinder, the soil piercing sleeve is located in the sampling outer cylinder and provided with an inner upper surface, and the lower end of the sampling inner cylinder is inserted in the inner upper surface; the sampling inner cylinder comprises a plurality of sample storage sleeves which are inserted and connected in the axial direction, and each sample storage sleeve comprises two arc-shaped plates which are symmetrically arranged and detachably connected; a blocking rod is vertically arranged on the inner wall of the soil piercing sleeve, the lower end of the blocking rod is hinged into the mounting groove, and one side face of the blocking rod can be erected on the bottom face of the mounting groove. When the sampling outer cylinder is pulled out, if soil at the inner bottom of the sampling inner cylinder falls down, the soil at the inner bottom of the sampling inner cylinder is blocked by the blocking rod; the sampling inner cylinder is pushed out of the sampling outer cylinder, and then each sample storage sleeve is disassembled one by one, so that the soil sample which is relatively completely stored can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of soil sampling, in particular to a sampling device for detecting heavy metals in soil. Background Art

[0002] Soil testing refers to the process of analyzing and evaluating the various chemical components and biological properties of the soil. These tests are essential for assessing the amount of pollutants in the soil and developing soil remediation strategies.

[0003] To detect the content of heavy metal pollutants in the soil, it is necessary to sample the soil at different depths to detect the content of heavy metal pollutants and the penetration depth. The sampling means in the prior art generally require sampling through a sampling tool. The sampling tool includes a sampling cylinder. The sampling cylinder is inserted into the soil and pulled out, and then the soil in the sampling cylinder is pushed out by a push rod. Since the sampling cylinder is usually long and the soil will adhere to the inner wall of the sampling cylinder, the push rod will cause great damage to the soil structure in the sampling cylinder during the process of pushing the sample out of the sampling cylinder again, affecting the representativeness and accuracy of the detection structure; and in the process of pushing the sampling cylinder out, the soil at the bottom of the sampling cylinder will fall off, resulting in inaccurate sampling depth. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a sampling device for soil heavy metal detection.

[0005] The technical solution of this utility model is as follows:

[0006] A sampling device for soil heavy metal detection comprises a vertically arranged sampling outer cylinder and a sampling inner cylinder inserted therein, the lower end of the sampling outer cylinder is detachably connected with a soil piercing sleeve, the soil piercing sleeve is connected to the sampling inner cylinder, the soil piercing sleeve is located in the sampling outer cylinder and is provided with an inner upper surface, and the lower end of the sampling inner cylinder is inserted on the inner upper surface;

[0007] The sampling inner cylinder includes a plurality of sample storage sleeves plug-connected in the axial direction, and each sample storage sleeve includes two arc-shaped plates symmetrically arranged and detachably connected;

[0008] The inner wall of the piercing sleeve is provided with a plurality of mounting grooves along the circumferential direction, and a stop rod is vertically provided in each mounting groove. The lower end of the stop rod is hinged in the mounting groove, and the upper end extends upward out of the mounting groove, and one side surface of the stop rod can be placed on the bottom surface of the mounting groove.

[0009] The sampling outer cylinder drives the sampling inner cylinder to be inserted into the soil to complete the sampling. When the sampling outer cylinder is pulled out, if the soil at the bottom of the sampling inner cylinder falls downward, the upper end of the stop rod will be pressed down, causing the stop rod to rotate inward, and then most of the soil at the bottom of the sampling inner cylinder will be blocked by the stop rod, thereby reducing the phenomenon of inaccurate sampling depth due to the falling of the sampled soil; and by pushing the sampling inner cylinder out of the sampling outer cylinder and then disassembling each sample storage sleeve one by one, a relatively complete soil sample can be obtained.

[0010] In order to facilitate the upper end of the lever to be exposed to the outside of the installation groove during sampling, so as to timely block the soil falling from the sampling inner tube, the depth of the installation groove is set to increase from top to bottom, and the cross-section is a triangular structure. The lower end of the lever is located on the inner side of the bottom surface of the installation groove.

[0011] Regarding the specific structure of the stopper rod, the length of the stopper rod is 0.5-1 times the inner diameter of the sampling inner tube. Within this range, most of the soil falling in the sampling inner tube can be blocked.

[0012] The installation position of the above-mentioned stop rod in the soil piercing sleeve is such that the highest point that the upper end of the stop rod can reach is located below the sampling inner cylinder, which can ensure that the soil sample is still retained at the bottom of the sampling inner cylinder.

[0013] In order to facilitate pushing the sampling inner cylinder out of the sampling outer cylinder, a cylinder cover is provided at the upper end of the sampling outer cylinder, the upper end surface of the sampling inner cylinder is tightly attached to the cylinder cover, a push rod is inserted in the cylinder cover, and one end of the push rod located in the sampling outer cylinder abuts against the upper end surface of the sampling inner cylinder.

[0014] Regarding the connection structure between the soil piercing sleeve and the sampling outer cylinder, an annular groove is provided on the upper end surface of the soil piercing sleeve, and the lower end of the sampling outer cylinder is threadedly connected to the annular groove.

[0015] The connection structure between the above-mentioned adjacent sample storage sleeves is that a first plug-in block is provided on the inner upper surface, a plug-in groove matching with the first plug-in block is provided at the lower end of the arc plate, and a second plug-in block matching with the plug-in groove is provided at the upper end of the arc plate. The second plug-in block of the lower arc plate can be inserted into the plug-in groove of the upper arc plate to realize the connection between adjacent sample storage sleeves, which is convenient for quick installation, disassembly and cleaning.

[0016] In order to facilitate the insertion of the sampling outer cylinder into the soil, the outer circumferential surface of the soil piercing sleeve is arranged to be an inverted conical surface.

[0017] The beneficial effects of the present invention are:

[0018] The sampling inner cylinder is inserted into the sampling outer cylinder, and the soil piercing sleeve is arranged at the lower end of the sampling outer cylinder, and the outer side surface is a pointed structure. The sampling outer cylinder is inserted into the soil manually or with the help of a motor, and the sampling outer cylinder can drive the sampling outer cylinder to be inserted into the soil to a certain depth. After the sampling is completed, the sampling outer cylinder is pulled out, and the upper end of the gear lever will rotate toward the inner side of the sampling inner cylinder under the action of the soil moving downward in the sampling inner cylinder, thereby blocking most of the soil in the sampling inner cylinder from falling further;

[0019] By disassembling the soil piercing sleeve, using an external tool to push the sampling inner cylinder out of the sampling outer cylinder, and then disassembling multiple sample storage sleeves one by one to separate the two symmetrically arranged arc plates, a well-preserved soil sample can be obtained. In addition, by setting the sampling inner cylinder, the phenomenon of serious structural damage of the soil when it is pushed out can be reduced.

[0020] The material of the sampling inner tube can be selected as non-metallic material, which can reduce the impact on soil sample detection;

[0021] By arranging one side of the lever to be able to be placed on the bottom surface of the mounting groove, when the lever is rotated to the maximum angle, the length direction of the lever can be perpendicular to the diameter of the sampling inner cylinder, or the angle between the extension line of the length direction of the lever and the diameter of the sampling inner cylinder is in the range of 60°-120°, so that the lever can be rotated toward the inside of the sampling inner cylinder to block the soil at the bottom of the sampling inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached picture:

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure;

[0024] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 3 It is a schematic diagram of the internal structure;

[0026] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Sampling outer cylinder; 2. Soil-piercing sleeve; 21. Mounting groove; 211. Bottom surface; 22. Annular groove; 23. Inner upper surface; 3. Sample storage sleeve; 31. Arc plate; 311. Plug-in groove; 312. Second plug-in block; 4. Gear lever; 5. Cylinder cover; 6. Push rod; 7. Cover plate; 8. First plug-in block. DETAILED DESCRIPTION

[0029] See also Figure 1 and Figure 2A sampling device for soil heavy metal detection is shown, comprising a vertically arranged sampling outer cylinder 1 and a sampling inner cylinder inserted therein, the lower end of the sampling outer cylinder 1 is detachably connected with a soil-piercing sleeve 2, the soil-piercing sleeve 2 is connected to the sampling inner cylinder, the soil-piercing sleeve 2 is located in the sampling outer cylinder 1 and is provided with an inner upper surface 23, and the lower end of the sampling inner cylinder is inserted on the inner upper surface 23.

[0030] See also Figure 1 and Figure 3 As shown, the sampling inner cylinder includes a plurality of sample storage sleeves 3 plug-in connected along the axial direction, each sample storage sleeve 3 includes two arc-shaped plates 31 symmetrically arranged and detachably connected, the sample storage sleeve 3 located at the top is located in the sampling outer cylinder 1, and a cover plate 7 is provided on the sample storage sleeve 3 located at the top, and the cover plate 7 is plugged with the second plug-in block 312 of the arc-shaped plate 31. The connection structure between the adjacent sample storage sleeves 3 is as follows: the inner upper surface 23 is provided with a first plug-in block 8, the lower end of the arc-shaped plate 31 is provided with a plug-in groove 311 matched with the first plug-in block, and the upper end of the arc-shaped plate 31 is provided with a second plug-in block 312 matched with the plug-in groove 311, and the second plug-in block 312 of the lower arc-shaped plate 31 can be inserted into the plug-in groove 311 of the upper arc-shaped plate 31, so as to realize the connection between the adjacent sample storage sleeves 3, and facilitate quick installation, disassembly and cleaning.

[0031] In order to facilitate pushing the sampling inner cylinder out of the sampling outer cylinder 1, a cylinder cover 5 is provided at the upper end of the sampling outer cylinder 1. The upper end surface of the sampling inner cylinder is in close contact with the cylinder cover 5, which can prevent the sampling inner cylinder from sliding in the sampling outer cylinder when it moves downward. A push rod 6 is inserted in the cylinder cover 5. One end of the push rod 6 located in the sampling outer cylinder 1 abuts against the cover plate 7, and the upper end of the push rod 6 is located outside the sampling outer cylinder 1.

[0032] See also Figure 2 As shown, the inner wall of the soil-piercing sleeve 2 is provided with a plurality of mounting grooves 21 along the circumferential direction, and a stopper rod 4 is vertically provided in each mounting groove 21. The lower end of the stopper rod 4 is hinged in the mounting groove 21, and the upper end extends upward and outward from the mounting groove 21. By arranging a side surface of the stopper rod 4 that can be laid on the bottom surface 211 of the mounting groove 21, when the stopper rod 4 is rotated to the maximum angle, the length direction of the stopper rod 4 can be perpendicular to the diameter of the sampling inner cylinder, or the angle between the extension line of the length direction of the stopper rod 4 and the diameter of the sampling inner cylinder is in the range of 60°-120°, so that the stopper rod 4 can be rotated toward the inner side of the sampling inner cylinder to block the soil at the lower part of the sampling inner cylinder.

[0033] In order to allow the upper end of the lever 4 to be exposed to the outside of the mounting groove 21 during sampling, and to facilitate timely blocking of soil falling from the sampling inner tube, the depth of the mounting groove 21 is set to increase from top to bottom, and the cross-section is a triangular structure. The lower end of the lever 4 is located on the inner side of the bottom surface 211 of the mounting groove 21.

[0034] See also Figure 2 and Figure 4 As shown, regarding the specific structure of the stopper rod 4, the length of the stopper rod 4 is 0.5-1 times the inner diameter of the sampling inner cylinder. Within this range, most of the soil falling in the sampling inner cylinder can be blocked. The installation position of the stopper rod 4 in the soil piercing sleeve 2 is such that the highest point that the upper end of the stopper rod 4 can reach is located below the sampling inner cylinder, which can ensure that the soil sample is still retained at the bottom of the sampling inner cylinder.

[0035] According to the above structure, the utility model can play the following role: the sampling outer cylinder 1 drives the sampling inner cylinder to be inserted into the soil to complete the sampling. When the sampling outer cylinder 1 is pulled out, if the soil at the bottom of the sampling inner cylinder falls downward, the upper end of the gear lever 4 will be pressed down, so that the gear lever 4 rotates inward, and then most of the soil at the bottom of the sampling inner cylinder is blocked by the gear lever 4, thereby reducing the phenomenon of inaccurate sampling depth caused by the falling of the sampled soil; and by pushing the sampling inner cylinder out of the sampling outer cylinder 1 and then disassembling each sample storage sleeve 3 one by one, a relatively complete soil sample can be obtained.

[0036] See also Figure 4 As shown, regarding the connection structure between the soil piercing sleeve 2 and the sampling outer cylinder 1, the upper end surface of the soil piercing sleeve 2 is provided with an annular groove 22, and the lower end of the sampling outer cylinder 1 is threadedly connected to the annular groove 22. In order to facilitate the insertion of the sampling outer cylinder 1 into the soil, the outer circumferential surface of the soil piercing sleeve 2 is set to an inverted conical surface.

Claims

1. A sampling device for detecting heavy metals in soil, comprising a vertically arranged sampling outer cylinder (1), characterized in that: A sampling inner cylinder is inserted into the sampling outer cylinder (1); a soil piercing sleeve (2) is detachably connected to the lower end of the sampling outer cylinder (1); the soil piercing sleeve (2) is connected to the sampling inner cylinder; the soil piercing sleeve (2) is located in the sampling outer cylinder (1) and is provided with an inner upper surface (23); and the lower end of the sampling inner cylinder is inserted on the inner upper surface (23); The sampling inner cylinder comprises a plurality of sample storage sleeves (3) plug-connected in the axial direction, and each sample storage sleeve (3) comprises two arc-shaped plates (31) which are symmetrically arranged and detachably connected; The inner wall of the soil-piercing sleeve (2) is provided with a plurality of installation grooves (21) along the circumferential direction, and a stop rod (4) is vertically provided in each installation groove (21). The lower end of the stop rod (4) is hinged in the installation groove (21), and the upper end extends upward out of the installation groove (21), and one side surface of the stop rod (4) can be placed on the bottom surface (211) of the installation groove (21).

2. A sampling device for soil heavy metal detection according to claim 1, characterized in that: The depth of the installation groove (21) increases from top to bottom, and the cross-section is a triangular structure. The lower end of the gear lever (4) is located at the inner side of the bottom surface (211) of the installation groove (21).

3. A sampling device for soil heavy metal detection according to claim 2, characterized in that: The length of the gear rod (4) is 0.5-1 times the inner diameter of the sampling inner cylinder.

4. A sampling device for soil heavy metal detection according to claim 1, 2 or 3, characterized in that: The highest point that the upper end of the gear rod (4) can reach is located below the sampling inner cylinder.

5. A sampling device for soil heavy metal detection according to claim 1, characterized in that: The upper end of the sampling outer cylinder (1) is provided with a cylinder cover (5), the upper end surface of the sampling inner cylinder is in close contact with the cylinder cover (5), a push rod (6) is inserted into the cylinder cover (5), and the lower end of the push rod (6) abuts against the upper end surface of the sampling inner cylinder.

6. A sampling device for soil heavy metal detection according to claim 1, characterized in that: An annular groove (22) is formed on the upper end surface of the soil-piercing sleeve (2), and the lower end of the sampling outer cylinder (1) is threadedly connected to the annular groove (22).

7. A sampling device for soil heavy metal detection according to claim 1, characterized in that: The inner upper surface (23) is provided with a first plug-in block (8), the lower end of the arc plate (31) is provided with a plug-in slot (311) matching with the first plug-in block, and the upper end of the arc plate (31) is provided with a second plug-in block (312) matching with the plug-in slot (311).

8. A sampling device for soil heavy metal detection according to claim 1 or 6, characterized in that: The outer circumferential surface of the soil-piercing sleeve (2) is an inverted conical surface.

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