An ore sampling tool

Abstract

The utility model provides an ore sampling tool belongs to ore sampling technical field, and the tool includes: the upper end of drill barrel is used for connecting drill pipe, and the lower end of drill barrel has counterbore, and the lower edge of drill barrel has sawtooth structure. The piston disc is arranged in the drill barrel and moves along the axis, and the circumferential position of the piston disc is fixed with the drill barrel, and the lower end of the piston disc is provided with a drill bit, and the outer diameter of the drill bit is less than the inner diameter of the drill barrel, and the upper section of the drill bit is provided with a plurality of reamers along the circumferential array, and the reamers are arranged along the radial direction of the drill bit, when drilling with the 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 the 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 the piston disc and the drill bit are located at the upper end of the counterbore. The scheme has higher sampling efficiency, and can effectively guarantee the integrity and accuracy of the sample.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ore sampling, and particularly relates to an ore sampling tool. BACKGROUND

[0002] In mine geological exploration, ore of mine geology is usually sampled, and a traditional ore sampling method is to drill into the ground by using a drill cylinder, drill into a certain depth downward by using the drill cylinder when reaching a predetermined depth, and then take the ore embedded in the drill cylinder as a sample. However, before the drill cylinder reaches the predetermined depth for sampling, the drill cylinder needs to be pulled out, the upper ore embedded in the drill cylinder needs to be cleaned, and then the drill cylinder needs to be put into the drilled hole to continue drilling to a certain depth, so that the ore sample at the predetermined depth can be obtained.

[0003] The above sampling increases the lifting, drilling and cleaning operations of the drill cylinder, resulting in a relatively complicated sampling process. In the second drilling process, part of the upper ore will still enter the drill cylinder, resulting in mixed ore samples and affecting the detection results. SUMMARY

[0004] To solve the problems in the prior art, the present application provides an ore sampling tool with higher sampling efficiency and effective guarantee of sample integrity and accuracy.

[0005] To achieve the purpose of the present application, the following scheme is adopted:

[0006] An ore sampling tool comprises a drill cylinder, an upper end of the drill cylinder being used to connect a drill pipe, a lower end of the drill cylinder having a counterbore, and a lower edge of the drill cylinder having a sawtooth structure.

[0007] A piston disc is arranged in the drill cylinder and moves along an axis, the piston disc being fixed relative to a circumferential position of the drill cylinder, a lower end of the piston disc being provided with a drill bit, an outer diameter of the drill bit being smaller than an inner diameter of the drill cylinder, and a plurality of reamers are arranged in an upper section of the drill bit along a circumference and move along a radial direction of the drill bit.

[0008] When the drill bit is used for drilling, a distance between an outer edge of the reamer and the axis of the drill cylinder is greater than or equal to a radius of the drill cylinder; when the drill cylinder is used for drilling, the distance between the outer edge of the reamer and the axis of the drill cylinder is smaller than a radius of the drill bit, and the piston disc and the drill bit are located at an upper end of the counterbore.

[0009] The present application has the following advantages:

[0010] 1. The present application only needs one-time drilling to complete the ore sampling work at the predetermined depth, which helps to improve the sampling efficiency.

[0011] 2. The piston plate and the upper end of the drill bit are used to seal the lower end of the drill cylinder during the drilling process, so as to avoid the upper ore outside the sample from entering the drill cylinder in advance, and effectively ensure the accuracy of the sample and avoid the mixing of upper and lower ores. BRIEF DESCRIPTION OF DRAWINGS

[0012] The drawings described herein are only for the purpose of illustrating selected embodiments and are not all possible embodiments, and are not intended to limit the scope of the present application.

[0013] Figure 1 The overall structural schematic diagram of the present application is shown.

[0014] Figure 2 The structural schematic diagram of the piston plate and the drill bit is shown.

[0015] Figure 3 The structural cross-sectional view of the present application when drilling with the drill bit is shown.

[0016] Figure 4 The structural cross-sectional view of the present application when drilling with the drill bit is shown. Figure 3 The local enlarged view at A in the figure.

[0017] Figure 5 The structural cross-sectional view of the present application when the reamer is retracted is shown.

[0018] Figure 6 The structural schematic diagram of the drill bit and the lower end of the drill cylinder when the reamer is retracted is shown.

[0019] Figure 7 The cross-sectional view of the present application when the piston plate and the drill bit are moved to the upper end of the counterbore is shown.

[0020] Figure 8 The structural schematic diagram of the lower end of the drill cylinder is shown.

[0021] Markings in the figure: drill cylinder-1, drill pipe-11, counterbore-12, sliding groove-13, annular groove-14, piston plate-2, limiting strip-21, drill bit-3, blind hole-31, notch-32, reamer-4, handle-41, clamping tooth-411, tool bit-42, main blade-421, guide blade-422, linear motor-5, elastic ring-6. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in detail below in combination with the drawings, but the embodiments described in the present application are part of the embodiments of the present application, not all the embodiments.

[0023] As Figures 1 to 8As shown in the figure, an ore sampling tool comprises a drill barrel 1, the upper end of which is used to connect a drill pipe 11, the lower end of the drill barrel 1 has a counterbore 12, and the lower edge of the drill barrel 1 has a sawtooth structure to meet the needs of drilling of the drill barrel 1.

[0024] Specifically, as shown in the figure, Figure 2 , Figure 3 the drill barrel 1 is provided with a piston disc 2 arranged to move along the axis, which 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, and the upper section of the drill bit 3 is provided with a plurality of reamers 4 arranged along the circumference, and the reamers 4 are arranged to move along the radial direction of the drill bit 3.

[0025] Specifically, as shown in the figure, Figure 3 , Figure 4 when drilling with the 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, which is used to expand the hole diameter drilled by the drill bit 3, so as to reduce the friction between the drill barrel 1 and the hole wall during the drilling process of the drill bit 3, which not only effectively reduces the demand of the sampling tool on the rotating torque, but also reduces the resistance when the drill barrel 1 is lowered; on the other hand, the reamers 4 are located between the working position of the drill bit 3 and the lower edge of the drill barrel 1, and the stone generated during the drilling of the drill bit 3 can be pushed to the outside of the drill barrel 1 by the reamers 4, so as to prevent the stone from being stuck between the outer wall of the drill bit 3 and the inner wall of the drill barrel 1.

[0026] Specifically, as shown in the figure, Figures 5 to 7 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 smaller than the radius of the drill bit 3, and the piston disc 2 and the drill bit 3 are both located at the upper end of the counterbore 12.

[0027] The process of ore sampling by using the above scheme is as follows, as shown in the figure, Figure 3 , Figure 4 in the stage of lowering the drill, the piston disc 2 is moved to the lower end of the counterbore 12, so that the drill bit 3 and the reamers 4 are both protruded from the lower end of the drill barrel 1; the drill pipe 11 is rotated and lowered, and the drill bit 3 is used to drill downward, and in this process, the lower end of the drill barrel 1 is blocked by the piston disc 2, so as to prevent the upper layer of ore from entering the drill barrel 1, thereby avoiding the mixing of the sample.

[0028] when the drill is lowered to the predetermined depth, as shown in the figure, Figures 5 to 7 the reamers 4 are withdrawn 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 are moved to the upper end of the counterbore 12, and the lower section of the counterbore 12 is used as a containing space to contain the ore sample; the drill pipe 11 is continuously rotated and lowered, and the drill barrel 1 is used to drill downward, and the ore below the drill barrel 1 will enter the counterbore 12 in this process; by increasing the depth of the drill, the sample in the counterbore 12 can be further compacted, so that the sample is stuck in the counterbore 12, thereby preventing the sample from falling when the drill barrel 1 is lifted.

[0029] After the sampling is completed and the drill barrel 1 is pulled out of the ground, the piston plate 2 is moved downward, and the ore sample can be easily pushed out of the sink hole 12 by the drill bit 3.

[0030] The present scheme only needs one drilling to complete the ore sampling work at the predetermined depth, which not only helps to improve the sampling efficiency, but also effectively ensures the accuracy of the sample and avoids the mixing of upper and lower ore.

[0031] Preferably, the outer wall of the drill barrel 1 is provided with a spiral guide structure for guiding the stone generated by the drilling of the drill bit 3 to move upwards of the drill barrel 1, thereby reducing the resistance when the drill bit 3 is drilled. Specifically, as shown in Figure 1 , the spiral guide structure is a spiral plate provided on the outer wall of the drill barrel 1. As another preferred scheme, the spiral guide structure is a spiral groove opened on the outer wall of the drill barrel 1.

[0032] Preferably, in combination with Figure 2 , Figure 3 and Figure 8 , the circumferential outer wall of the piston plate 2 is provided with at least one limiting strip 21, the length direction of which is parallel to the axis of the piston plate 2, and the inner wall of the drill barrel 1 is provided with a sliding groove 13 parallel to the axis thereof, and the limiting strip 21 is embedded in the sliding groove 13 one by one, so as to fix the circumferential position of the piston plate 2 relative to the drill barrel 1, so that the piston plate 2 and the drill bit 3 can rotate together with the drill barrel 1.

[0033] Preferably, as shown in Figure 8 , the inner wall of the drill barrel 1 is provided with a plurality of annular grooves 14, which can be used to lock the compressed ore sample after the compressed ore sample fills the annular groove 14, thereby reducing the risk of accidental falling of the sample.

[0034] Preferably, as shown in Figure 3 , Figure 5 and Figure 7 , the upper end of the sink hole 12 is provided with a linear motor 5, the main shaft of which is parallel to the drill barrel 1, and the piston plate 2 is arranged at the lower end of the main shaft of the linear motor 5, and the linear motor 5 is used to control the movement of the piston plate 2 along the axial direction of the drill barrel 1. Specifically, the power supply of the linear motor 5 can be provided by the cable passing through the drill pipe 11, or an energy storage battery can be arranged inside the drill barrel 1, because the working time of the linear motor 5 is relatively short during the sampling process, and a large energy storage battery is not required.

[0035] Preferably, as shown in Figure 2As shown in the figure, the top of the drill bit 3 is coaxially provided with a blind hole 31, and the piston disc 2 is detachably arranged on the top of the drill bit 3, which can be connected by screws. The reamer 4 includes a shank 41 radially penetrating the side of the drill bit 3 and a head 42 arranged at the outer end of the shank 41, and the inner end of the shank 41 is located in the blind hole 31. A spring ring 6 with a ring structure is arranged in the blind hole 31, and the spring ring 6 simultaneously penetrates the inner ends of all the shanks 41. When the spring ring 6 is tightened, the head 42 is located inside the drill bit 3, so that the distance between the outer edges of the reamer 4 along the axis of the drill cylinder 1 is less than the radius of the drill bit 3, so as to move the drill bit 3 into the counterbore 12. When the reamer 4 moves outward, the spring ring 6 is further tightened.

[0036] As shown in the figure, Figure 3 , Figure 4 the upper end of the head 42 protrudes from the top surface of the shank 41. When the drill bit 3 is drilled, the upper end of the head 42 covers the outside of the lower end of the drill cylinder 1. Therefore, during the drilling process of the drill bit 3, not only can the hole diameter be further expanded by the reamer 4, but also the outer wall of the drill cylinder 1 and the sawtooth structure at the lower end of the drill cylinder 1 are effectively protected, preventing the drill cylinder 1 from being prematurely worn out due to long-term participation in the drilling operation. In addition, the structure also uses the outer wall of the drill cylinder 1 to limit the head 42, preventing the reamer 4 from being automatically retracted, thereby ensuring that the reamer 4 is in the reaming operation throughout the drilling process of the drill bit 3. Preferably, the inner wall of the upper end of the head 42 is in contact with the outer wall of the drill cylinder 1 to improve the stability of the installation structure of the reamer 4. As shown in the figure, Figure 3 , Figure 6 the outer wall of the drill bit 3 is provided with a slot 32 for accommodating the head 42. When the spring ring 6 is tightened, the head 42 is embedded in the slot 32, so that the distance between the outer edges of the reamer 4 along the axis of the drill cylinder 1 is less than the radius of the drill bit 3. When it is necessary to retract the reamer 4, first move the piston disc 2 downward to separate the upper end of the head 42 from the drill cylinder 1, then use the spring ring 6 to pull the reamer 4 to move towards the center of the drill bit 3, and then move the piston disc 2 upward, so as to move the piston disc 2 and the drill bit 3 to the upper end of the counterbore 12 at the same time.

[0037] Preferably, as shown in the figure, Figure 2 , Figure 4 the outer edge of the head 42 includes a main blade 421 and a guide blade 422 arranged in sequence from top to bottom. The distance between the main blade 421 and the axis of the drill bit 3 is greater than the distance between the guide blade 422 and the axis of the drill bit 3. The main blade 421 plays a major role in reaming, and the distance between the main blade 421 and the axis of the drill bit 3 is the radius of the hole. The upper end of the guide blade 422 is inclined towards the outside of the drill bit 3. When the drill bit 3 is drilled, the lower end of the guide blade 422 is located inside the drill bit 3, so that the reamer 4 can more smoothly ream the hole drilled by the drill bit 3, reducing the impact and vibration of the hole wall on the reamer 4.

[0038] Further preferably, the side of the cutter head 42 toward the rotation direction of the drill bit 3 is inclined toward the outside above the drill bit 3, so that the rock produced by reaming and drilling can be smoothly pushed upward, preventing the rock from being accumulated below the drill cylinder 1, which not only affects the drilling efficiency, but also easily mixes into the sample, affecting the accuracy of the sampling.

[0039] Preferably, as shown in Figure 2 The top surface of the outer end of the cutter handle 41 has a tooth 411 for matching the sawtooth structure of the lower end of the drill cylinder 1. When the drill bit 3 is drilled, the tooth 411 is embedded in the groove of the sawtooth structure, so as to improve the stability of the installation structure of the reamer 4, reduce the installation gap of the reamer 4 along the tangential direction of the drill bit 3, and reduce the vibration of the reamer 4.

[0040] The above description is only the preferred embodiments of the present application, and does not mean the only or limit the present application. Those skilled in the art should understand that various changes or equivalent replacements made to the present application without departing from the scope of the present application, all belong to the scope of protection of the present application.

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); 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) provided on 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). 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).

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, 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).

7. The ore sampling tool according to claim 1, 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).

8. The ore sampling tool according to claim 1, 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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