A soil non-destructive taking drill bit

Abstract

The utility model discloses a kind of soil nondestructive taking drill bits including barrel drill, sampling barrel;The barrel drill upper portion is provided with the connecting portion connected with drilling equipment or drill rod, lower portion is provided with the slot of circumferential array distribution, forms multiple cutting parts;The sampling barrel is closed in upper portion The barrel shape is set in barrel drill interior, coaxial with barrel drill, detachably connected with barrel drill interior top surface, breathable groove is set on sampling barrel top surface.The soil nondestructive taking drill bit proposed in the utility model adopts double-layer sleeve drilling structure, outer barrel drill is used to obtain to be sampled coarse core, inner sampling barrel is used for nondestructive sampling, reduces the disturbance of soil original structure in the drilling process of drill bit drilling, and operation efficiency can be improved.In specific structure, outer barrel drill can loosen the soil of barrel drill two sides nearby area, facilitate inner sampling barrel to cut soil, while sampling head barrel thickness can be thinned, further reduce the disturbance to soil original structure.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, specifically to a non-destructive soil sampling drill bit. Background Technology

[0002] Non-destructive soil sampling is a technique for collecting soil samples without damaging the original structure and physicochemical properties of the soil. It is primarily used in environmental monitoring, agricultural research, and pollution investigation. Its core objective is to preserve the natural state of the soil and ensure the representativeness and accuracy of the sampling results. Commonly used methods include the ring cutter method and soil auger. During sampling, operators need to carefully control the cutting / spinning speed of the ring cutter or soil auger to minimize damage to the soil structure, making the work relatively inefficient and requiring highly skilled and experienced personnel. Summary of the Invention

[0003] The purpose of this invention is to provide a non-destructive soil extraction drill bit to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a non-destructive soil extraction drill bit. It includes a tubular drill and a sampling tube; the upper part of the tubular drill is provided with a connecting part that connects to the drilling equipment or drill rod, and the lower part is provided with a circumferential array of slots to form multiple cutting parts; the sampling tube is a closed-top cylindrical shape, located inside the tubular drill, coaxial with the tubular drill, and detachably connected to the top surface inside the tubular drill, and a venting groove is provided on the top surface of the sampling tube.

[0005] Furthermore, spiral protrusions and multiple soil outlet windows are provided on the outer wall of the drill bit.

[0006] Furthermore, the sampling cylinder is rotatably connected to the top surface inside the cylinder drill via a bearing.

[0007] Furthermore, the bearing is an external thread bearing. The outer ring is fixed to the top surface of the drill bit, a limit hole is provided on the top surface of the drill bit, and a limit groove is provided on the inner ring of the bearing.

[0008] Furthermore, a sampling window is provided on the side of the sampling tube, with a central angle of 180-240 degrees; a detachable window cover is provided at the sampling window, and the window cover is connected by bolts.

[0009] Furthermore, the sampling tube also includes a plastic sleeve.

[0010] Furthermore, a pressure ring is provided inside the sampling tube. The pressure ring is a thin ring structure with an outer diameter that is the same as the inner diameter of the bottom of the sampling tube. The plastic sleeve is squeezed between the pressure ring and the inner wall of the sampling tube. The pressure ring is detachably connected to the sampling tube by bolts.

[0011] This invention proposes a non-destructive soil sampling drill bit, employing a double-layered sleeve drilling structure. The outer sleeve drill is used to obtain the coarse core sample, while the inner sampling sleeve is used for non-destructive sampling. This reduces disturbance to the original soil structure in the sampling core area during the drilling process, thereby improving operational efficiency. Specifically, the outer sleeve drill can loosen the soil in the vicinity of both sides of the outer sleeve drill, facilitating the inner sampling sleeve to cut through the soil. Simultaneously, it allows for a thinner sampling head, further minimizing disturbance to the original soil structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall scheme of one embodiment of the present utility model.

[0013] Figure 2 This is an exploded view of one embodiment of the present invention.

[0014] Figure 3 This is an exploded view of another embodiment of the present invention.

[0015] Figure 4 This is a cross-sectional view of the top of the drill bit and sampling cylinder according to another embodiment of this utility model. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] As attached Figure 1-4 As shown, the non-destructive soil sampling drill bit involved in this utility model includes a cylindrical drill 1 and a sampling cylinder 2.

[0018] The upper part of the tubular drill 1 is provided with a connecting part 11 that connects to the drilling equipment or drill rod. The connecting part can be an existing connecting structure, such as the one shown in the attached figure. Figure 1 The square column shown has an attached... Figure 4 The outer side of the connecting cylinder shown is threaded. The lower part is provided with circumferentially distributed slots 12, forming multiple cutting parts 121.

[0019] The sampling tube 2 is a closed tube at the top, located inside the drill 1, coaxial with the drill 1, and detachably connected to the top surface inside the drill 1. A ventilation groove 20 is provided on the top surface of the sampling tube 2.

[0020] The outer diameter of sampling tube 2 is 2-5 cm smaller than the inner diameter of drill tube 1. This difference is mainly related to factors such as the wall thickness of drill tube 1, soil moisture content, and soil shear strength. Furthermore, a spiral protrusion 13 and multiple soil discharge windows 14 are provided on the outer wall of the drill 1. Multiple soil discharge windows 14 are also provided on the top surface of the drill 1.

[0021] The spiral protrusion 13 can break up the soil on the outside of the drill 1, which helps the soil on the inside of the drill 1 to overflow through the soil outlet window 14 when the sampling tube 2 is inserted.

[0022] Furthermore, the sampling cylinder 2 is connected to the top surface inside the cylinder drill 1 via a threaded structure.

[0023] In another embodiment, the sampling tube 2 is rotatably connected to the inner top surface of the drill 1. When the drill 1 rotates, the sampling tube 2 can remain stationary or rotate at a low speed, which helps to further reduce disturbance to the soil, as shown in the attached figure. Figure 4 As shown, the sampling cylinder 2 is rotatably connected to the inner top surface of the drill cylinder 1 via a bearing 21. The outer ring of the bearing 21 is fixed to the top surface of the drill cylinder 1. In the applicant's practice, the drill cylinder 1 is made of steel pipe, and the top surface of the drill cylinder 1 is prepared by welding a circular plate to the top of the steel pipe. Before welding the circular plate, the bearing 21 is fixed to the center of the lower side of the top surface of the drill cylinder 1. The bearing 21 is an external thread bearing, with a limiting hole 211 provided on the top surface of the drill cylinder 1 and a limiting groove 212 provided on the inner ring of the bearing 21. In use, a screwdriver is inserted into the limiting hole 211 and into the limiting groove 212 to lock the bearing. After that, the top of the sampling cylinder 2 is bolted to the bearing 21.

[0024] To facilitate the extraction of soil cores, a sampling window 22 is provided on the side of the sampling cylinder 2, with a central angle of 180-240 degrees. A detachable window cover 23 is provided at the sampling window 22, and the window cover 23 is connected by bolts.

[0025] A plastic sleeve s can also be provided in the sampling tube 2. The plastic sleeve is a tubular structure with openings at the top and bottom. To facilitate the connection of the plastic sleeve, a pressure ring 24 is provided inside the sampling tube 2. The pressure ring 24 is a thin ring structure with an outer diameter that is the same as the inner diameter of the bottom of the sampling tube 2. When in use, the plastic sleeve is first placed into the sampling tube 2, and then the pressure ring 24 is placed in. The plastic sleeve is squeezed between the pressure ring 24 and the inner wall of the sampling tube 2. The pressure ring 24 is detachably connected to the sampling tube 2 by bolts. To facilitate disassembly, the pressure ring 24, the lower part of the sampling tube 2, and the lower part of the window cover 23 can be connected by a set of bolts.

[0026] The method of use for this application is as follows: First, place the plastic sleeve into the sampling tube 2 and fix it with the pressure ring 24, then close the window cover 23. Then, use a screwdriver or special clamp to insert into the limiting hole 211 at the top of the drill 1 to lock the bearing. Then, connect the top of the sampling tube 2 to the screw of the external thread bearing to complete the installation of the drill bit. Then connect it to the drilling equipment or drill rod. After sampling is completed, remove the drill bit, separate the sampling tube 2 and the drill 1, open the closed window cover 23, remove the pressure ring 24, and obtain the soil core.

[0027] It should be noted that, unless otherwise explicitly specified and limited, terms such as installation, connection, linking, fixing, and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A non-destructive soil extraction drill bit, characterized in that, It includes a tubular drill and a sampling tube; the upper part of the tubular drill is provided with a connecting part that connects to the drilling equipment or drill rod, and the lower part is provided with a circumferential array of slots to form multiple cutting parts; the sampling tube is a closed-top cylindrical shape, located inside the tubular drill, coaxial with the tubular drill, and detachably connected to the top surface inside the tubular drill, and a venting groove is provided on the top surface of the sampling tube.

2. The soil non-destructive drilling bit according to claim 1, characterized in that, The outer wall of the drill bit is provided with spiral protrusions and multiple soil outlet windows.

3. The soil non-destructive drilling bit according to claim 1, characterized in that, The sampling cylinder is rotatably connected to the top surface inside the cylinder drill via a bearing.

4. The soil non-destructive drilling bit according to claim 3, characterized in that, The bearing is an external thread bearing, with the outer ring fixed to the top surface of the drill bit. A limit hole is provided on the top surface of the drill bit, and a limit groove is provided on the inner ring of the bearing.

5. The soil non-destructive drilling bit according to claim 1, characterized in that, The sampling tube has a sampling window on its side, with a central angle of 180-240 degrees; the sampling window is equipped with a detachable cover, which is connected by bolts.

6. The soil non-destructive drilling bit according to claim 5, characterized in that, The sampling tube also includes a plastic sleeve.

7. The soil non-destructive drilling bit according to claim 6, characterized in that, A pressure ring is provided inside the sampling tube. The pressure ring is a thin ring structure with an outer diameter that is the same as the inner diameter of the bottom of the sampling tube. A plastic sleeve is squeezed between the pressure ring and the inner wall of the sampling tube. The pressure ring is detachably connected to the sampling tube by bolts.

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