Soil sampling drill bit

Abstract

The utility model discloses a soil sampling drill bit, relates to the technical field of soil sampling, and can reduce the cost for integrally replacing the soil sampling drill bit to a certain extent. The soil sampling drill bit comprises a cylindrical drill bit body, and a sampling groove is formed in the drill bit body; the outer wall of the drill bit body is further detachably connected with at least two cutting arc plates, the cutting arc plates are distributed at intervals along the peripheral side of the drill bit body, one end of each cutting arc plate protrudes out of the end of the drill bit body, and the end, protruding out of the drill bit body, of each cutting arc plate is fixedly connected with a plurality of cutting teeth; wherein a plurality of annular grooves are formed in the outer wall of the drill bit body at intervals, the cutting arc plates correspond to the annular grooves in a one-to-one mode, first threaded sections are further fixedly connected to the convex faces of the outer walls of the cutting arc plates, and second threaded sections are fixedly connected to the outer wall of the drill bit body; the first threaded section and the second threaded section are in threaded connection with threaded fixing rings.

Description

Technical Field

[0001] The present application relates to the technical field of soil sampling, and in particular to a soil sampling drill bit. Background Art

[0002] Obtaining undisturbed soil samples from the strata is an important task in the field of geotechnical engineering investigation. By conducting geotechnical tests on undisturbed soil samples, engineers can obtain many physical and mechanical indicators of the foundation soil, and then carry out subsequent related design work based on the mechanical indicators of the foundation soil.

[0003] The methods for obtaining original soil samples in the prior art include the exploration well method or the drilling method. The exploration well method is to use manual or mechanical methods to dig a "well-shaped" hole (exploratory well) with a fixed diameter and vertical to the ground, and then manually use a soil knife to horizontally scratch and sample the wall of the exploration well. The implementation process of the drilling method is: first use a machine to drill a hole in the stratum of the soil sample to be tested, and then use a special soil sampling drill bit to vertically extend into the hole to obtain the soil sample. The soil sampling drill bit is provided with an inner cavity for storing the original soil sample, and a plurality of cutting teeth are provided at the end of the soil sampling drill bit.

[0004] With regard to the above-mentioned related technologies, the inventors believe that when operators collect soil samples through a sampler, the cutting teeth at the end of the sampling drill bit will wear out during long-term use. After the wear occurs, the sampling drill bit needs to be replaced as a whole, and the cost of replacing the cutting teeth at the sampling drill bit as a whole is relatively high. Utility Model Content

[0005] In order to reduce the cost of replacing the soil sampling drill bit as a whole, the present application provides a soil sampling drill bit.

[0006] The soil sampling drill bit provided in this application adopts the following technical solution:

[0007] A soil sampling drill bit comprises a cylindrical drill bit body, wherein the drill bit body is provided with a sampling groove, and the sampling groove is open toward any end of the drill bit body;

[0008] The outer wall of the drill body is detachably connected with at least two cutting arc plates, the cutting arc plates are spaced apart along the circumference of the drill body, one end of the cutting arc plate protrudes from the end of the drill body, and the end of the cutting arc plate protruding from the drill body is fixedly connected with a plurality of cutting teeth;

[0009] Among them, the outer wall of the drill body is provided with a plurality of annular grooves arranged at intervals, the cutting arc plates correspond to the annular grooves one by one, the convex surface of the outer wall of the cutting arc plate is also fixedly connected with a first thread segment, the outer wall of the drill body is fixedly connected with a second thread segment, and the first thread segment and the second thread segment are threadedly connected with a threaded fixing ring.

[0010] By adopting the above technical solution, the drill bit body cuts the soil sample through the cutting teeth and stores the soil sample into the sampling groove. When the cutting teeth are worn, the operator first removes the threaded fixing ring to release the fixing state of the cutting arc plate and the drill bit body. The operator removes the cutting arc plate corresponding to the worn cutting teeth from the ring groove and replaces the intact cutting arc plate. Then the operator rotates the threaded fixing ring, and the threaded fixing ring connects the cutting arc plate and the drill bit body as a whole. By providing a cutting arc plate detachably connected to the drill bit body, the cost of the operator replacing the soil sampling drill bit as a whole can be reduced, and the efficiency of the operator replacing the worn cutting teeth can also be improved.

[0011] Optionally, a chamfer is provided at an edge of the threaded fixing ring close to the drill body.

[0012] By adopting the above technical solution, the chamfered threaded fixing ring can facilitate the threaded fixing ring to be sleeved on the outside of the cutting arc plate, thereby making the cutting arc plate and the drill bit body connected as one, thereby improving the efficiency of connecting the cutting arc plate and the drill bit body through the threaded fixing ring.

[0013] Optionally, a limiting block is fixedly connected to the outer wall of the drill body, and one end of the limiting block is fitted with the end of the threaded fixing ring.

[0014] By adopting the above technical solution, when the threaded fixing ring connects the drill body and the cutting arc plate as one, the end of the threaded fixing ring fits against the outer wall of the limit block, so as to reduce the probability of the threaded fixing ring sliding along the axial direction of the drill body and improve the efficiency of the threaded fixing ring in connecting the drill body and the cutting arc plate.

[0015] Optionally, at least two limit blocks are provided, and the limit blocks are arranged at intervals along the outer wall of the drill body.

[0016] By adopting the above technical solution, both limit blocks can realize the fixed position of the supporting threaded fixing ring, thereby reducing the probability of the threaded fixing ring being deflected during the installation process and improving the convenience of the threaded fixing ring connecting the drill body and the cutting arc plate.

[0017] Optionally, the limit block is integrally formed with the drill body.

[0018] By adopting the above technical solution, the limit block and the drill body are integrally formed to improve the connection strength between the limit block and the drill body, thereby facilitating the limit block to axially limit the threaded fixing ring and reducing the probability of the threaded fixing ring sliding along the axial direction of the drill body.

[0019] Optionally, the cutting arc plate and the cutting teeth are integrally formed.

[0020] By adopting the above technical solution, the cutting arc plate and the cutting teeth are connected as one through one-piece molding, which can not only improve the strength of the connection between the cutting arc plate and the cutting teeth and reduce the probability of separation between the cutting teeth and the cutting arc plate, but also facilitate the cutting teeth to cut the soil samples in the soil layer to be processed.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] When the cutting teeth are worn, the operator first removes the threaded fixing ring to release the fixing state of the cutting arc plate and the drill bit body. The operator removes the cutting arc plate corresponding to the worn cutting teeth from the ring groove and replaces the intact cutting arc plate. Then the operator rotates the threaded fixing ring, which connects the cutting arc plate and the drill bit body as one. By providing a cutting arc plate that is detachably connected to the drill bit body, the cost of replacing the soil sampling drill bit as a whole can be reduced, and the efficiency of replacing the worn cutting teeth can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a soil sampling drill bit in an assembled state according to an embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a soil sampling drill bit in an explosion state according to an embodiment of the present application;

[0025] Figure 3 It is a three-dimensional cross-sectional view of a soil sampling drill bit according to an embodiment of the present application.

[0026] Explanation of the accompanying drawings: 1. drill bit body; 11. sampling groove; 12. ring groove; 13. vent hole; 14. limit block; 2. cutting arc plate; 21. cutting tooth; 3. first thread segment; 4. second thread segment; 5. threaded fixing ring; 6. threaded connection segment; 61. threaded hole. Implementation

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] The present application discloses a soil sampling drill bit. Figure 1 , Figure 2 and Figure 3 The soil sampling drill bit provided in the present application includes a cylindrical drill bit body 1, and the drill bit body 1 is provided with a sampling groove 11, and the sampling groove 11 is openly arranged toward either end of the drill bit body 1. The end of the drill bit body 1 away from the opening of the sampling groove 11 is also connected with a threaded connection section 6 through an integral molding manner. The threaded connection section 6 is coaxially arranged with the drill bit body 1, and the threaded connection section 6 is provided with a threaded hole 61 along its own axial direction.

[0029] The outer wall of the drill body 1 is connected with at least two cutting arc plates 2 in a detachable manner, one end of the cutting arc plate 2 protrudes from the end of the drill body 1. In this embodiment, there are two cutting arc plates 2, and the two cutting arc plates 2 are spaced apart along the circumference of the drill body 1. The outer wall of the drill body 1 is provided with at least two annular grooves 12 spaced apart, the number of the annular grooves 12 is the same as the number of the cutting arc plates 2, and each cutting arc plate 2 extends into one annular groove 12.

[0030] The end of the cutting arc plate 2 protruding from the body of the drill bit is fixedly connected with a plurality of cutting teeth 21 by an integral molding method. The cross section of the cutting teeth 21 is triangular, and the plurality of cutting teeth 21 are distributed at intervals along the arc direction of the cutting arc plate 2 .

[0031] The convex surface of the outer wall of the cutting arc plate 2 is also fixedly connected with the first thread segment 3 by means of integral molding, and the outer wall of the drill body 1 is integrally molded with the second thread segment 4. The size and model of the threads arranged at the first thread segment 3 and the second thread segment 4 are the same, and the first thread segment 3 and the second thread segment 4 are threadedly connected with a threaded fixing ring 5, which can be implemented as a nut.

[0032] A vent hole 13 connected to the sampling groove 11 is also provided at the end of the drill body 1. The vent hole 13 is implemented as a cylindrical hole. The opening direction of the vent hole 13 is parallel to the opening direction of the sampling groove 11. In this embodiment, three vent holes 13 are provided, and the three vent holes 13 are distributed at intervals along the circumference of the drill body 1.

[0033] By adopting the above technical solution, the drill body 1 is connected to the rotating shaft of the driving motor through the threaded section, and the rotating shaft of the driving motor drives the drill body 1 to rotate. The drill body 1 cuts the soil sample through the cutting teeth 21 at the cutting arc plate 2 and stores the soil sample in the sampling groove 11. When the cutting teeth 21 are worn, the operator first removes the threaded fixing ring 5, and the fixing state of the cutting arc plate 2 and the drill body 1 is released. The operator removes the cutting arc plate 2 corresponding to the worn cutting teeth 21 from the ring groove 12 and replaces the intact cutting arc plate 2. After that, the operator rotates the threaded fixing ring 5, and the threaded fixing ring 5 connects the cutting arc plate 2 and the drill body 1 as a whole. By providing the cutting arc plate 2 detachably connected to the drill body 1, it can not only reduce the cost of the operator to replace the soil sampling drill bit as a whole, but also improve the efficiency of the operator to replace the worn cutting teeth 21.

[0034] In some embodiments, the threaded fixing ring 5 provided in the present application is provided with a chamfer near the edge of the drill body 1 , and the chamfer can be implemented as an oblique angle or a rounded angle. In the present embodiment, the chamfer is implemented as an oblique angle.

[0035] By adopting the above technical scheme, the chamfered edge of the threaded fixing ring 5 close to the drill body 1 can facilitate the threaded fixing ring 5 to be sleeved on the outside of the cutting arc plate 2. At the same time, the threaded fixing ring 5 can be conveniently sleeved on the outside of the drill body 1 through the chamfered edge thereof, and then the cutting arc plate 2 and the drill body 1 are connected as one through the threaded fixing ring 5, thereby improving the efficiency of the threaded fixing ring 5 in connecting the cutting arc plate 2 and the drill body 1 as one.

[0036] In some embodiments, the outer wall of the drill body 1 is also fixedly connected to the limit block 14 by an integral molding manner. The limit block 14 is implemented as a rectangular parallelepiped. The limit block 14 protrudes from the outer wall of the drill body 1, and one end of the limit block 14 is fitted with the end of the threaded fixing ring 5.

[0037] By adopting the above technical solution, when the operator connects the drill body 1 and the cutting arc plate 2 as a whole through the threaded fixing ring 5, the end of the threaded fixing ring 5 fits against the outer wall of the limit block 14, so as to reduce the probability of the threaded fixing ring 5 sliding along the axial direction of the drill body 1, thereby improving the efficiency of the threaded fixing ring 5 in connecting the drill body 1 and the cutting arc plate 2 as a whole.

[0038] In some embodiments, at least two limit blocks 14 are provided. In this embodiment, two limit blocks 14 are provided, and the two limit blocks 14 are spaced apart along the outer wall of the drill body 1 .

[0039] By adopting the above technical solution, the two limit blocks 14 can realize the fixed position of the supporting threaded fixing ring 5, thereby reducing the probability of the threaded fixing ring 5 being deflected during the process of being connected to the outer side of the drill body 1, and improving the convenience of connecting the threaded fixing ring 5 to the drill body 1 and the cutting arc plate 2.

[0040] The implementation principle of a soil sampling drill bit provided in the present application is: when the cutting tooth 21 is worn, the operator first removes the threaded fixing ring 5, and the fixing state of the cutting arc plate 2 and the drill bit body 1 is released. The operator removes the annular groove 12 of the cutting arc plate 2 corresponding to the worn cutting tooth 21, and replaces the intact cutting arc plate 2. Then the operator rotates the threaded fixing ring 5, and the threaded fixing ring 5 connects the cutting arc plate 2 and the drill bit body 1 as a whole. By providing a cutting arc plate 2 detachably connected to the drill bit body 1, the cost of the operator replacing the soil sampling drill bit as a whole can be reduced, and the efficiency of the operator replacing the worn cutting teeth 21 can also be improved.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A soil sampling drill bit, characterized in that: The drill bit comprises a cylindrical drill bit body (1), the drill bit body (1) being provided with a sampling groove (11), the sampling groove (11) being open toward any end of the drill bit body (1); The outer wall of the drill body (1) is detachably connected to at least two cutting arc plates (2), the cutting arc plates (2) are spaced apart along the circumference of the drill body (1), one end of the cutting arc plate (2) protrudes from the end of the drill body (1), and the end of the cutting arc plate (2) protruding from the drill body (1) is fixedly connected to a plurality of cutting teeth (21); The outer wall of the drill body (1) is provided with a plurality of annular grooves (12) arranged at intervals, the cutting arc plates (2) correspond to the annular grooves (12) one by one, a first thread segment (3) is fixedly connected to the convex surface of the outer wall of the cutting arc plate (2), a second thread segment (4) is fixedly connected to the outer wall of the drill body (1), and a threaded fixing ring (5) is threadedly connected to the first thread segment (3) and the second thread segment (4).

2. The soil sampling drill bit according to claim 1, characterized in that: The threaded fixing ring (5) is provided with a chamfer at an edge close to the drill body (1).

3. The soil sampling drill bit according to claim 1, characterized in that: The outer wall of the drill body (1) is fixedly connected to a limit block (14), and one end of the limit block (14) is in contact with the end of the threaded fixing ring (5).

4. The soil sampling drill bit according to claim 3, characterized in that: At least two of the limit blocks (14) are provided, and the limit blocks (14) are arranged at intervals along the outer wall of the drill body (1).

5. The soil sampling drill bit according to claim 4, characterized in that: The limiting block (14) and the drill bit body (1) are integrally formed.

6. The soil sampling drill bit according to any one of claims 1 to 5, characterized in that: The cutting arc plate (2) and the cutting teeth (21) are integrally formed.

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