Ore sampling tool

Abstract

An ore sampling tool belongs to the technical field of ore sampling and comprises a drill cylinder, the upper end of the drill cylinder is used for connecting a drill pipe, the lower end of the drill cylinder is provided with a counter bore, and the lower edge of the drill cylinder is provided with a sawtooth structure. A piston disc movably arranged along the axis is arranged in the drill cylinder and is fixed relative to the circumferential position of the drill cylinder, a drill bit is arranged at the lower end of the piston disc, the outer diameter of the piston disc is smaller than the inner diameter of the drill cylinder, and a plurality of reaming cutters are arranged on the upper section of the drill bit in a circumferential array mode and are movably arranged in the radial direction of the drill bit. When the drill bit is used for drilling, the distance between the outer edge of the reaming cutter and the axis of the drill barrel is larger than or equal to the radius of the drill barrel. When the drilling barrel is used for drilling, the distance between the outer edge of the reaming cutter and the axis of the drilling barrel is smaller than the radius of the drill bit, and the piston disc and the drill bit are located at the upper end of the counter bore. According to the scheme, the sampling efficiency is higher, and the integrity and accuracy of the sample can be effectively ensured.

Description

Technical Field

[0001] This invention belongs to the field of ore sampling technology, and in particular relates to an ore sampling tool. Background Technology

[0002] In mine geological exploration, ore sampling is typically performed. The traditional method involves drilling into the ground using a drill pipe. Once a predetermined depth is reached, the drill pipe is continued to drill further down, and the ore embedded inside the pipe is used as the sample. However, before reaching the predetermined depth for sampling, the drill pipe must be pulled out, and the upper layer of ore embedded inside must be cleared away. Then, the drill pipe is placed back into the drilled hole and drilled to a further depth. This process ensures a more accurate ore sample is obtained at the predetermined depth.

[0003] The above sampling process involves an additional drilling operation, including raising and lowering the drill barrel and cleaning the drill barrel, making the sampling process relatively cumbersome. Furthermore, during the second drilling operation, some ore from the upper layer may still enter the drill barrel, resulting in mixed ore samples and affecting the subsequent test results. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an ore sampling tool that has higher sampling efficiency and can effectively ensure the integrity and accuracy of the sample.

[0005] In order to achieve the objective of this invention, the following solution is proposed: A mineral sampling tool includes: a drill barrel, the upper end of which is used to connect to a drill pipe, the lower end of which has a countersunk hole, and the lower edge of the drill barrel has a serrated structure.

[0006] The drill barrel is equipped with a piston disc that moves along the axis and is fixed relative to the circumference of the drill barrel. The lower end of the piston disc is equipped with a drill bit whose outer diameter is smaller than the inner diameter of the drill barrel. The upper section of the drill bit is equipped with multiple reaming cutters arranged in a circumferential array, and the reaming cutters are arranged to move radially along the drill bit. When drilling with a drill bit, the distance between the outer edge of the reamer and the axis of the drill barrel is greater than or equal to the radius of the drill barrel; when drilling with a drill barrel, the distance between the outer edge of the reamer and the axis of the drill barrel is less than the radius of the drill bit, and both the piston disc and the drill bit are located at the upper end of the countersink.

[0007] The beneficial effects of this invention are as follows: 1. This method requires only one drilling run to complete the ore sampling work at the predetermined depth, which not only helps to improve sampling efficiency; 2. During the drilling process, the piston disc and the upper end of the drill bit are used to seal the lower end of the drill barrel to prevent upper layer ore other than the sample from entering the drill barrel in advance. This can effectively ensure the accuracy of the sample and avoid mixing of upper and lower layer ore. Attached Figure Description

[0008] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0009] Figure 1 A schematic diagram of the overall structure of this application is shown.

[0010] Figure 2 A schematic diagram of the piston disc and drill bit structure is shown.

[0011] Figure 3 A cross-sectional view of the structure of this application is shown when drilling with a drill bit.

[0012] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0013] Figure 5 A cross-sectional view of the structure of this application is shown when the reamer is retracted.

[0014] Figure 6 A schematic diagram of the structure of the drill bit and the lower end of the drill barrel when the reamer is retracted is shown.

[0015] Figure 7 This application shows a cross-sectional view of the piston disc and drill bit as they move to the top of the countersunk hole.

[0016] Figure 8 A schematic diagram of the lower end structure of the drill barrel is shown.

[0017] The markings in the diagram are: Drill barrel-1, Drill tube-11, Countersunk hole-12, Slide groove-13, Annular groove-14, Piston disc-2, Limiting strip-21, Drill bit-3, Blind hole-31, Groove-32, Reamer-4, Tool holder-41, Clamping tooth-411, Tool head-42, Main cutting edge-421, Guide cutting edge-422, Linear motor-5, Elastic ring-6. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0019] like Figures 1 to 8 As shown, an ore sampling tool includes: a drill barrel 1, the upper end of which is used to connect to a drill pipe 11, the lower end of the drill barrel 1 having a countersunk hole 12, and the lower edge of the drill barrel 1 having a serrated structure to meet the drilling requirements of the drill barrel 1.

[0020] Specifically, such as Figure 2 , Figure 3As shown, a piston disc 2 is provided inside the drill barrel 1 and is movable along the axis. Its position relative to the circumference of the drill barrel 1 is fixed. A drill bit 3 is provided at the lower end of the piston disc 2. Its outer diameter is smaller than the inner diameter of the drill barrel 1. Multiple reaming cutters 4 are arranged in a circumferential array on the upper section of the drill bit 3, and the reaming cutters 4 are arranged to move radially along the drill bit 3.

[0021] Specifically, such as Figure 3 , Figure 4 As shown, when drilling with drill bit 3, the distance between the outer edge of the reamer 4 and the axis of drill barrel 1 is greater than or equal to the radius of drill barrel 1. This is used to enlarge the diameter of the hole drilled by drill bit 3, thereby reducing the friction between drill barrel 1 and hole wall during drilling. This not only effectively reduces the requirement of the sampling tool for rotational torque, but also reduces the resistance when drill barrel 1 descends. On the other hand, the reamer 4 is located between the working part of drill bit 3 and the lower edge of drill barrel 1. The reamer 4 can be used to push the stone generated during drilling of drill bit 3 to the outside of drill barrel 1, preventing the stone from getting stuck between the outer wall of drill bit 3 and the inner wall of drill barrel 1.

[0022] Specifically, such as Figures 5 to 7 As shown, when drilling with the drill barrel 1, the distance between the outer edge of the reamer 4 and the axis of the drill barrel 1 is less than the radius of the drill bit 3, and both the piston disc 2 and the drill bit 3 are located at the upper end of the countersunk hole 12.

[0023] The process of ore sampling using the above scheme is as follows: Figure 3 , Figure 4 As shown, during the drilling stage, the piston disc 2 is moved to the bottom of the counterbore 12, so that the drill bit 3 and the reamer 4 both protrude from the lower end of the drill tube 1; the drill tube 11 is rotated and lowered, and the drill bit 3 is used to drill downwards. During this process, the piston disc 2 is used to seal the lower end of the drill tube 1, which can prevent the upper layer of ore from entering the drill tube 1 and avoid sample mixing.

[0024] After drilling to the predetermined depth, as follows Figures 5 to 7 As shown, the reamer 4 is retracted into the drill bit 3, and then the piston disc 2 is moved upward, so that the piston disc 2 and the drill bit 3 move to the upper end of the countersunk hole 12. The lower section of the countersunk hole 12 is used as a receiving space to hold the ore sample. The drill tube 11 is rotated and lowered, and the drill barrel 1 is used to drill downward. The ore below the drill barrel 1 will enter the countersunk hole 12 during this process. By increasing the drilling depth, the sample in the countersunk hole 12 can be further compacted, so that the sample is stuck in the countersunk hole 12 and prevents the sample from falling when the drill barrel 1 is lifted.

[0025] After sampling is completed, the drill barrel 1 is lifted out of the ground, and the piston plate 2 is moved downwards. The ore sample can be easily pushed out of the sinkhole 12 using the drill bit 3.

[0026] This method requires only one drilling run to complete the ore sampling work at the predetermined depth, which not only helps to improve sampling efficiency, but also effectively ensures the accuracy of the sample and avoids mixing of upper and lower layers of ore.

[0027] Preferably, the outer wall of the drill barrel 1 is provided with a spiral guide structure to guide the rock material generated by the drill bit 3 upwards, thereby reducing the resistance when the drill bit 3 descends. Specifically, such as Figure 1 As shown, the spiral guide structure is a spiral plate disposed on the outer wall of the drill barrel 1. As another preferred embodiment, the spiral guide structure is a spiral groove formed on the outer wall of the drill barrel 1.

[0028] Preferred, combined Figure 2 , Figure 3 and Figure 8 As shown, the outer circumferential wall of the piston disc 2 is provided with at least one limiting strip 21, the length direction of which is parallel to the axis of the piston disc 2. The inner wall of the drill barrel 1 is provided with a sliding groove 13 parallel to its axis. The limiting strip 21 is embedded in the sliding groove 13 in a corresponding manner to ensure that the circumferential position of the piston disc 2 and the drill barrel 1 is relatively fixed, so that the piston disc 2 and the drill bit 3 can rotate together with the drill barrel 1.

[0029] Preferred, such as Figure 8 As shown, the inner wall of the drill barrel 1 is provided with multiple annular grooves 14. After the compressed ore sample fills the annular grooves 14, the compressed ore sample can be locked in place by changing the annular grooves 14, reducing the risk of the sample accidentally falling off.

[0030] Preferred, such as Figure 3 , Figure 5 and Figure 7 As shown, a linear motor 5 is installed at the upper end of the countersunk hole 12, with its spindle parallel to the drill barrel 1. A piston disk 2 is located at the lower end of the spindle of the linear motor 5, and the linear motor 5 controls the piston disk 2 to move axially along the drill barrel 1. Specifically, the power supply for the linear motor 5 can be provided by a cable running through the drill pipe 11, or an energy storage battery can be installed inside the drill barrel 1, because the working time of the linear motor 5 during the sampling process is short, and a large energy storage battery is not required.

[0031] Preferred, such as Figure 2As shown, a blind hole 31 is coaxially formed on the top of the drill bit 3. The piston disc 2 is detachably mounted on the top of the drill bit 3, specifically by screw connection. The reamer 4 includes a shank 41 radially passing through the side of the drill bit 3 and a cutting head 42 located at the outer end of the shank 41. The inner end of the shank 41 is located within the blind hole 31. A circular elastic ring 6 is provided within the blind hole 31, and the elastic ring 6 passes through the inner ends of all the shanks 41. When the elastic ring 6 is tightened, the cutting head 42 is located inside the drill bit 3, thereby making the distance between the outer edges of the reamer 4 along the axis of the drill barrel 1 smaller than the radius of the drill bit 3, so as to facilitate moving the drill bit 3 into the countersunk hole 12. When the reamer 4 moves outward, the elastic ring 6 is further tightened.

[0032] Preferred, such as Figure 3 , Figure 4 As shown, the upper end of the cutter head 42 protrudes from the top surface of the shank 41. When drilling with the drill bit 3, the upper end of the cutter head 42 covers the outer side of the lower end of the drill barrel 1. Therefore, during the drilling process with the drill bit 3, not only can the hole diameter be further enlarged with the help of the reamer 4, but the outer wall of the drill barrel 1 and the serrated structure at the lower end of the drill barrel 1 are also effectively protected, preventing the drill barrel 1 from prematurely wearing out due to long-term participation in drilling operations. Furthermore, this structure also uses the outer wall of the drill barrel 1 to limit the cutter head 42, preventing the reamer 4 from retracting on its own, thereby ensuring that the reamer 4 is engaged in reaming operations throughout the drilling process of the drill bit 3. Preferably, the inner wall of the upper end of the cutter head 42 is in contact with the outer wall of the drill barrel 1 to improve the stability of the reamer 4 mounting structure. Figure 3 , Figure 6 As shown, the outer wall of the drill bit 3 has a groove 32 for accommodating the cutter head 42. When the elastic ring 6 is tightened, the cutter head 42 is embedded in the groove 32, so that the distance between the outer edges of the reamer 4 along the axis of the drill barrel 1 is less than the radius of the drill bit 3. When it is necessary to retract the reamer 4, first move the piston plate 2 downward to separate the upper end of the cutter head 42 from the drill barrel 1. Use the elastic ring 6 to pull the reamer 4 towards the center of the drill bit 3. Then move the piston plate 2 upward, so that the piston plate 2 and the drill bit 3 can be moved to the upper end of the countersunk hole 12 at the same time.

[0033] Preferred, such as Figure 2 , Figure 4 As shown, the outer edge of the cutter head 42 includes a main cutting edge 421 and a guide cutting edge 422 arranged sequentially from top to bottom. The distance between the main cutting edge 421 and the axis of the drill bit 3 is greater than the distance between the guide cutting edge 422 and the axis of the drill bit 3. The main cutting edge 421 plays the main role in reaming the hole, and the distance between it and the axis of the drill bit 3 is the radius of the hole. The upper end of the guide cutting edge 422 is inclined towards the outside of the drill bit 3. When drilling with the drill bit 3, the lower end of the guide cutting edge 422 is located inside the drill bit 3, so that the reaming cutter 4 can more smoothly ream the hole drilled by the drill bit 3 and reduce the impact and vibration of the hole wall on the reaming cutter 4.

[0034] In a further preferred embodiment, the side of the cutter head 42 facing the rotation direction of the drill bit 3 is tilted towards the outside above the drill bit 3, which can smoothly push the stone material generated by the hole enlargement and drilling upwards, preventing the stone material from accumulating below the drill barrel 1. This not only affects the drilling efficiency, but also makes it easy for the accumulated stone material to mix into the sample, affecting the accuracy of sampling.

[0035] Preferred, such as Figure 2 As shown, the top surface of the outer end of the tool holder 41 has a retaining tooth 411, which is used to match the saw tooth structure at the lower end of the drill barrel 1. When the drill bit 3 is drilling, the retaining tooth 411 is embedded in the groove of the saw tooth structure to improve the stability of the mounting structure of the reamer 4, reduce the mounting gap of the reamer 4 along the tangential direction of the drill bit 3, and reduce the vibration of the reamer 4.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. An ore sampling tool, comprising: A drill barrel (1), the upper end of which is used to connect to a drill pipe (11), the lower end of the drill barrel (1) has a countersunk hole (12), and the lower edge of the drill barrel (1) has a serrated structure, characterized in that: The drill barrel (1) is provided with a piston disc (2) that moves along the axis. The piston disc (2) is fixed relative to the circumferential position of the drill barrel (1). The lower end of the piston disc (2) is provided with a drill bit (3), the outer diameter of which is smaller than the inner diameter of the drill barrel (1). The upper section of the drill bit (3) is provided with multiple reaming cutters (4) arranged in a circumferential array, and the reaming cutters (4) are arranged to move radially along the drill bit (3). When drilling with drill bit (3), the distance between the outer edge of the reamer (4) and the axis of the drill barrel (1) is greater than or equal to the radius of the drill barrel (1); when drilling with drill barrel (1), the distance between the outer edge of the reamer (4) and the axis of the drill barrel (1) is less than the radius of the drill bit (3), and both the piston disc (2) and the drill bit (3) are located at the upper end of the countersunk hole (12).

2. The ore sampling tool according to claim 1, characterized in that, The outer wall of the drill barrel (1) is provided with a spiral guide structure to guide the stone material generated by the drill bit (3) to move upwards of the drill barrel (1).

3. The ore sampling tool according to claim 1, characterized in that, The outer circumferential wall of the piston disc (2) is provided with at least one limiting strip (21), the length direction of which is parallel to the axis of the piston disc (2), and the inner wall of the drill barrel (1) is provided with a sliding groove (13) parallel to its axis, and the limiting strip (21) is embedded in the sliding groove (13) one by one.

4. The ore sampling tool according to claim 1, characterized in that, The inner wall of the drill barrel (1) is provided with multiple annular grooves (14).

5. The ore sampling tool according to claim 1, characterized in that, A linear motor (5) is provided at the upper end of the countersunk hole (12), and its spindle is parallel to the drill barrel (1). The piston disc (2) is located at the lower end of the spindle of the linear motor (5).

6. The ore sampling tool according to claim 1, characterized in that, A blind hole (31) is coaxially provided on the top of the drill bit (3). The piston disc (2) is detachably provided on the top of the drill bit (3). The reamer (4) includes a shank (41) that passes radially through the side of the drill bit (3) and a cutting head (42) located at the outer end of the shank (41). The inner end of the shank (41) is located in the blind hole (31). A ring-shaped elastic ring (6) is provided in the blind hole (31). The elastic ring (6) passes through the inner ends of all the shanks (41). When the elastic ring (6) is tightened, the cutting head (42) is located inside the drill bit (3).

7. The ore sampling tool according to claim 6, characterized in that, The upper end of the cutter head (42) protrudes from the top surface of the handle (41). When drilling with the drill bit (3), the upper end of the cutter head (42) covers the outer side of the lower end of the drill barrel (1). The outer wall of the drill bit (3) is provided with a groove (32) to accommodate the cutter head (42). When the elastic ring (6) is tightened, the cutter head (42) is embedded in the groove (32).

8. The ore sampling tool according to claim 6, characterized in that, The outer edge of the cutter head (42) includes a main cutting edge (421) and a guide cutting edge (422) arranged sequentially from top to bottom. The distance between the main cutting edge (421) and the axis of the drill bit (3) is greater than the distance between the guide cutting edge (422) and the axis of the drill bit (3). The upper end of the guide cutting edge (422) is inclined towards the outside of the drill bit (3). When drilling with the drill bit (3), the lower end of the guide cutting edge (422) is located inside the drill bit (3).

9. A mineral sampling tool according to claim 6, characterized in that, The cutter head (42) is tilted to the side facing the direction of rotation of the drill bit (3) and towards the outside above the drill bit (3).

10. A mineral sampling tool according to claim 6, characterized in that, The top surface of the outer end of the tool holder (41) has a locking tooth (411) to match the sawtooth structure of the lower edge of the drill barrel (1). When the drill bit (3) is used for drilling, the locking tooth (411) is embedded in the groove of the sawtooth structure.

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