A drill rod for deep sampling of high-moisture-content soil in the rhizosphere of an ancient tree

Abstract

The utility model discloses a kind of drill pipes for ancient tree rhizosphere high water content soil deep layer sampling, including drill pipe body, drill head, sample tube, sample tube cover, limiting wing, drill pipe cover, connecting rod, limiting disc.The utility model tightens sample tube cover, sample tube by drill pipe cover, cooperate sealing washer, enhance sealing effect, avoid high water content soil sampling when mud enters between drill pipe body and sample tube, in reducing sample loss, ensure that sampling is complete while, it is beneficial to subsequent sample tube removal;The utility model is provided with limiting wing for sample tube, and drill pipe cover tightens sample tube, prevent sample tube from moving, and high stability;The utility model ingeniously connects drill pipe cover, sample tube cover together by connecting rod, limiting disc, do not affect drill pipe cover tightens sample tube, and when sample tube is pulled out, just need to pull drill pipe cover, it is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of soil sampling technology, specifically relating to a drill rod for deep sampling of high moisture content soil around the roots of ancient trees. Background Technology

[0002] During the health diagnosis of ancient and famous trees, some ancient trees exhibit poor growth, and the reasons for their endangerment may be related to the soil. To further confirm the diagnosis, it is necessary to sample the soil around the roots of the ancient trees, with a sampling depth of no less than 150 cm. Existing sampling techniques, such as soil drills, have tubular drill rods with drill bits at the front end, which are relatively easy to operate on shallow soil layers within 50 cm. However, for soil layers deeper than 150 cm, extracting samples is inconvenient and may lead to sample damage, compromising sample integrity. The existing double-tube drill rod design aims to obtain a complete sample directly by removing the inner tube after the drill rod enters the soil layer, and then removing the drill rod from the soil layer. This method is suitable for sampling ordinary soil layers with low moisture content. However, in tropical rainforest rhizosphere soil with high moisture content, mud can easily enter between the two tubes when using a double-tube drill rod for sampling, resulting in sample loss. Furthermore, it makes separating the two tubes difficult, sometimes requiring the entire drill rod to be removed from the soil layer before attempting to separate the inner tube. During the removal of the drill rod, vibration and rotation can easily affect the sample inside the inner tube, compromising its integrity. Therefore, it is essential to develop a drill rod for deep sampling of high-moisture-content rhizosphere soil from ancient trees that can solve these problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a drill rod for deep sampling of soil with high water content in the rhizosphere of ancient trees.

[0004] The purpose of this utility model is achieved as follows: It includes a drill rod body, a drill bit, a sample tube, a sample tube cap, a limiting wing, a drill rod cap, a connecting rod, and a limiting disc. The lower end of the drill rod body is detachably connected to the drill bit via a threaded structure. A sealing gasket is fixed to the lower end of the sample tube, which is located within the drill rod body. The sealing gasket at the lower end of the sample tube abuts against the upper end of the drill bit located within the drill rod body. The inner wall of the sample tube is flush with the inner wall of the drill bit. The upper end of the sample tube is detachably connected to the sample tube cap via a threaded structure. A positioning groove is provided from top to bottom on the upper inner wall of the drill rod body, and the upper end of the positioning groove is flush with the upper drill rod opening of the drill rod body. The upper outer wall of the quality control tube is provided with a limiting wing from top to bottom. The limiting wing is located in the positioning slide groove and slides up and down with the positioning slide groove. The drill rod cover is detachably connected to the upper drill rod opening of the drill rod body through a threaded structure. The lower end of the drill rod cover inside the drill rod body is a ring structure, and the ring structure presses against the edge of the sample tube cover. A connecting rod is fixed at the bottom center of the drill rod cover and passes through the central through hole of the sample tube cover. A limiting plate is fixed at the lower end of the connecting rod. The limiting plate is located below the top surface of the sample tube cover and the diameter of the limiting plate is larger than the diameter of the central through hole of the sample tube cover. Both the top surface of the sample tube cover and the top surface of the drill rod cover are provided with ventilation holes.

[0005] The drill rod body, sample tube cap, drill rod cap, connecting rod, and limiting plate can be made of common metal materials in this field, such as stainless steel, while the drill bit is made of special steel; the drill rod body and drill bit are common tools for soil sampling in this field.

[0006] Preferably, the length of the drill pipe body is 1500mm~2000mm.

[0007] Preferably, the sample tube is a transparent tube, and the material can be PVC.

[0008] Preferably, the sample tube and the limiting wing are integrally formed.

[0009] Preferably, an external threaded post is fixed at the center of the top of the drill pipe cap, and the external threaded post can be used to connect other tools with its threaded structure.

[0010] Preferably, there are four positioning grooves, which are evenly spaced along the inner wall of the drill pipe body, and there are four limiting wings, each corresponding to a positioning groove.

[0011] A longer connecting rod can be selected. When taking out the sampling tube after sampling, the drill rod cover can be removed first, and the drill rod cover can be lifted up appropriately (do not lift the sample tube). The drill rod cover is separated from the drill rod body, so that the top surface of the sample tube is exposed. Use a rubber stopper to seal the vent hole on the top surface of the sample tube; then lift the drill rod cover and pull the sample tube upward.

[0012] The beneficial effects of this utility model are as follows: This utility model uses the drill rod cap to press the sample tube cap and sample tube together, and with the help of a sealing gasket, enhances the sealing effect and prevents mud from entering between the drill rod body and the sample tube when sampling soil with high moisture content. This reduces sample loss, ensures complete sampling, and facilitates subsequent removal of the sample tube. The sample tube of this utility model is equipped with a limiting wing, and the drill rod cap presses the sample tube tightly, preventing the sample tube from moving around and ensuring high stability. This utility model cleverly connects the drill rod cap and sample tube cap together through a connecting rod and a limiting plate, which does not affect the drill rod cap's ability to press the sample tube. Moreover, when lifting and removing the sample tube, only the drill rod cap needs to be lifted, which is quite convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the drill pipe body; Figure 3 for Figure 1 A magnified internal structure diagram of point A in the middle; Figure 4 for Figure 1 A magnified internal structure diagram at point B; In the figure: 1-Drill rod body, 2-Drill bit, 3-Sample tube, 4-Sample tube cap, 5-Limiting wing, 6-Drill rod cap, 7-Connecting rod, 8-Limiting disc, 9-Sealing gasket, 10-Positioning groove, 11-Ventilation hole, 12-External threaded post. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0015] Example 1 As attached Figures 1-4The present invention includes a drill rod body 1, a drill bit 2, a sample tube 3, a sample tube cap 4, a limiting wing 5, a drill rod cap 6, a connecting rod 7, and a limiting disc 8. The sample tube 3 is a transparent PVC tube. The lower end of the drill rod body 1 is detachably connected to the drill bit 2 via a threaded structure. A sealing gasket 9 is fixed to the lower end of the sample tube 3. The sample tube 3 is located inside the drill rod body 1, with the sealing gasket 9 at the lower end of the sample tube 3 abutting against the upper end of the drill bit 2 located inside the drill rod body 1. The inner wall of the sample tube 3 is flush with the inner wall of the drill bit 2. The upper end of the sample tube 3 is detachably connected to the sample tube cap 4 via a threaded structure. Four positioning grooves 10 are provided from top to bottom on the upper inner wall of the drill rod body 1, with the upper end of each positioning groove 10 flush with the upper drill rod opening of the drill rod body 1. The four positioning grooves 10 are evenly spaced along the circumferential direction of the inner wall of the drill rod body 1. The upper outer wall of the sample tube 3 is provided from top to bottom. The sample tube 3 is provided with four limiting wings 5, which correspond one-to-one with the positioning slide grooves 10. The limiting wings 5 ​​and the sample tube 3 are integrally formed. The limiting wings 5 ​​are located in the positioning slide grooves 10 and slide vertically with the limiting wings 5 ​​and the positioning slide grooves 10. The drill rod cover 6 is detachably connected to the upper end of the drill rod opening of the drill rod body 1 through a threaded structure. The lower end of the drill rod cover 6 inside the drill rod body 1 is a ring structure, and the ring structure presses against the edge of the sample tube cover 4. A connecting rod 7 is fixed at the bottom center of the drill rod cover 6 and passes through the central through hole of the sample tube cover 4. A limiting plate 8 is fixed at the lower end of the connecting rod 7. The limiting plate 8 is located below the top surface of the sample tube cover 4. The diameter of the limiting plate 8 is larger than the diameter of the central through hole of the sample tube cover 4. The top surface of the sample tube cover 4 and the top surface of the drill rod cover 6 are provided with ventilation holes 11. An external threaded post 12 is fixed at the top center of the drill rod cover 6.

[0016] The working principle and process of this utility model are as follows: First, install the drill bit 2, then insert the upper end of the drill rod opening of the sample tube 3 into the drill rod body 1. When inserting, align the limiting wing 5 with the positioning slide groove 10 and slide it into the positioning slide groove 10. The limiting wing 5 cooperates with the positioning slide groove 10 to limit the horizontal rotation direction of the sample tube 3. Install the drill rod cover 6, which presses the sample tube cover 4 and the sample tube 3 together with the sealing gasket 9 to seal the sample tube 3 and the drill bit 2. After the drill rod is assembled, connect the drill rod to the drilling machine. A manual handle can also be installed on the top of the drill rod. The drill rod enters the deep layer of high-moisture soil around the roots of the ancient tree. Soil samples are placed inside sample tube 3. The sealing gasket 9 prevents mud from entering the drill rod body 1 and sample tube 3, facilitating the removal of sample tube 3 after sampling. Once the drill rod reaches the required depth, the drill is removed, the drill rod cover 6 is removed, and the drill rod cover 6 is lifted. The sample tube 3 is then pulled upwards from the drill rod body 1 via the connecting rod 7 and the limiting plate 8. The sample tube cover 4 is then removed, and tube sleeves are installed at both ends of the sample tube 3 for testing. Finally, the drill rod is removed.

Claims

1. A drill rod for deep sampling of high-moisture soil in the rhizosphere of ancient trees, comprising a drill rod body (1), a drill bit (2), a sample tube (3), a sample tube cap (4), a limiting wing (5), a drill rod cap (6), a connecting rod (7), and a limiting disc (8), characterized in that... The lower end of the drill rod body (1) is detachably connected to the drill bit (2) via a threaded structure. The lower end of the sample tube (3) is fixed with a sealing gasket (9). The sample tube (3) is located inside the drill rod body (1). The sealing gasket (9) at the lower end of the sample tube (3) abuts against the upper end of the drill bit (2) located inside the drill rod body (1). The inner wall of the sample tube (3) is flush with the inner wall of the drill bit (2). The upper end of the sample tube (3) is detachably connected to the sample tube cap (4) via a threaded structure. The upper inner wall of the drill rod body (1) is provided with a positioning groove (10) from top to bottom. The upper end of the positioning groove (10) is flush with the upper end of the drill rod opening of the drill rod body (1). The upper outer wall of the sample tube (3) is provided with a limiting wing (5) from top to bottom. The limiting wing (5) is located in the positioning groove (10). 10) Inside, and the limiting wing (5) and the positioning slide groove (10) slide together up and down. The drill rod cover (6) is detachably connected to the upper end of the drill rod opening of the drill rod body (1) through a threaded structure. The lower end of the drill rod cover (6) inside the drill rod body (1) is a ring structure, and the ring structure presses against the edge of the sample tube cover (4). A connecting rod (7) is fixed at the bottom center of the drill rod cover (6), and the connecting rod (7) passes through the central through hole of the sample tube cover (4). A limiting plate (8) is fixed at the lower end of the connecting rod (7). The limiting plate (8) is located below the top surface of the sample tube cover (4). The diameter of the limiting plate (8) is larger than the diameter of the central through hole of the sample tube cover (4). The top surface of the sample tube cover (4) and the top surface of the drill rod cover (6) are both provided with ventilation holes (11).

2. The drill rod for deep sampling of high-moisture-content soil at the rhizosphere of ancient trees according to claim 1, characterized in that... The drill rod body (1) has a length of 1500mm~2000mm.

3. The drill rod for deep sampling of high-moisture-content soil at the rhizosphere of ancient trees according to claim 1, characterized in that... The sample tube (3) is a transparent tube.

4. The drill rod for deep sampling of high-moisture-content soil at the rhizosphere of ancient trees according to claim 1 or 2, characterized in that... The sample tube (3) and the limiting wing (5) are integrally formed.

5. The drill rod for deep sampling of high-moisture-content soil at the rhizosphere of ancient trees according to claim 1, characterized in that... The drill pipe cap (6) is fixed with an external threaded post (12) at the top center.

6. The drill rod for deep sampling of high-moisture-content soil at the rhizosphere of ancient trees according to claim 1, characterized in that... There are four positioning grooves (10), which are evenly spaced along the inner wall of the drill rod body (1). There are four limiting wings (5), and each limiting wing (5) corresponds to a positioning groove (10).

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