A double cutter based grooving sampling device and sampling method

Abstract

This invention relates to the field of geological exploration sampling technology, specifically disclosing a grooved sampling device and method based on a dual-cutterhead system. The device includes a mounting frame with a mounting shaft mounted in the center. A main shaft sleeve is rotatably mounted in the center of the mounting shaft, with copper rotors at both ends. Secondary shaft sleeves are rotatably mounted at both ends of the mounting shaft inside the mounting frame. A permanent magnet rotor, corresponding to the copper rotor, is mounted at one end of each secondary shaft sleeve, and a cutterhead is mounted at the end of the secondary shaft sleeve furthest from the permanent magnet rotor. A protective cover is provided on the mounting frame over the cutterhead. This invention integrates cutting, hardness detection, and automatic separation into one unit. By utilizing the real-time rotation speed of the dual cutterheads to detect and invert the rock hardness information of the cutting area and identify ore body boundaries, it achieves efficient and accurate grooved sampling. This results in high sampling efficiency, good sample quality, reduced manpower, and improved work efficiency.

Description

Technical Field

[0001] This invention relates to the field of geological exploration sampling technology, specifically to a grooved sampling device and sampling method based on a double-blade disc. Background Technology

[0002] Groove sampling is one of the most commonly used sampling methods in solid mineral exploration. It involves carving a long groove in the ore body to collect all the excavated ore fragments for chemical analysis to evaluate the grade and reserves of the mineral resources. This technique is widely used in geological exploration, underground mining tunnels, and other engineering projects.

[0003] At present, the following problems exist in the grooving sampling operation: (1) Traditional manual grooving adopts the "hammering and chiseling" method, which requires the operator to maintain a fixed posture for a long time to chisel; the existing mechanical grooving equipment also generally adopts the two-process separation mode of "cutting first and then chiseling", which cannot achieve continuous automated operation, resulting in high labor intensity and low work efficiency; (2) During the manual grooving process, it is difficult to accurately control the cross-sectional size of the sample groove, resulting in unequal amounts of material extracted per meter, which directly affects the accuracy of grade calculation; (3) During the cutting process of the existing grooving sampling equipment, the operator cannot know the rock hardness, ore body boundary position and other information of the current cutting area, and can only judge based on experience, and cannot identify the ore body boundary in real time. For thin vein ore bodies, once the cutting path deviates from the vein direction, it is very easy to mix in the surrounding rock, which seriously affects the representativeness of the sample.

[0004] Patent No. CN202410211504.1 discloses a wall memory double-plate groove sampling machine, which guides the cutting machine through a guide plate, but it cannot determine the rock hardness in the cutting area during the cutting process, nor can it identify the boundary of the ore body, and its function is relatively simple.

[0005] Therefore, the present invention provides a groove sampling device and sampling method based on a dual-blade disk to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the existing defects and provide a groove sampling device and sampling method based on a double cutter head. By integrating cutting, hardness detection and automatic separation into one unit, and using the rotation speed of the double cutter head to detect and invert the rock hardness information of the cutting area in real time, efficient and accurate groove sampling is achieved, avoiding the mixing of surrounding rock, significantly improving the representativeness of the sample, saving manpower, improving work efficiency, and being easy to use. It can effectively solve the problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a grooving sampling device based on a double-blade disc, comprising a mounting frame, a mounting shaft mounted in the middle of the mounting frame, a main shaft sleeve rotatably mounted in the middle of the mounting shaft, copper rotors at both ends of the main shaft sleeve, and secondary shaft sleeves rotatably mounted at both ends of the mounting shaft located inside the mounting frame, a permanent magnet rotor corresponding to the copper rotor at one end of the secondary shaft sleeve, and the copper rotor and the permanent magnet rotor forming a magnetic coupler that transmits torque using slip characteristics and achieves overload protection, a blade disc at the end of the secondary shaft sleeve away from the permanent magnet rotor, a protective cover covering the blade disc on the mounting frame, uniformly distributed magnets on the secondary shaft sleeve, and a Hall sensor corresponding to the magnets on the protective cover for real-time detection of the rotational speed of the secondary shaft sleeve, thereby inverting the rock hardness through the change in rotational speed;

[0008] The mounting bracket has two symmetrically arranged fixed shafts on its side. A pressure plate is rotatably mounted on the fixed shaft. A connecting rod is installed at the upper end between the two pressure plates, and the pressure plates are rotatably connected to the connecting rod. The lower ends of the two pressure plates are arranged opposite each other, which are used to insert into two parallel cutting grooves after cutting to apply symmetrical lateral extrusion force to the sample block.

[0009] The mounting bracket is equipped with a driver that drives the main shaft sleeve and the pressure plate to rotate.

[0010] As a preferred embodiment of the present invention, the driver includes a servo motor mounted on a mounting bracket, the output shaft of the servo motor is mounted with a drive shaft via a coupling, the drive shaft is provided with a main gear, the main shaft sleeve is provided with a secondary gear corresponding to the main gear, and the main gear and the secondary gear are connected by chain drive.

[0011] As a preferred embodiment of the present invention, a bearing seat for fixing the drive shaft is installed on the top of the protective cover. A right-angle reducer is installed on the end of the drive shaft away from the servo motor. A drive disk is installed on the output shaft of the right-angle reducer. An eccentric column is installed on the drive disk. A drive rod is rotatably mounted on the eccentric column. The end of the drive rod away from the eccentric column is rotatably connected to the upper side of one of the pressure plates. The drive disk and the eccentric column form an eccentric wheel mechanism. When the drive disk rotates, the eccentric column drives the drive rod to reciprocate, thereby driving the pressure plate to oscillate periodically around the fixed axis. This causes the lower end of the pressure plate to apply alternating lateral compressive force to the sample block in the cutting groove, causing the sample block to fatigue fracture from the root.

[0012] As a preferred embodiment of the present invention, the mounting frame is equipped with a connecting frame for connecting external mobile devices. The top of the connecting frame is provided with a mounting hole for inserting a screw. The connecting frame is used to install the entire device on a robotic arm, a track-walking mechanism, or a manually held rod, so as to achieve precise positioning and feeding of the grooving sampling device on the surface of the ore body.

[0013] A sampling method for a groove sampling device based on a dual-blade disk includes the following steps:

[0014] S1. Fix the mounting bracket to the external mobile device through the connecting bracket, drive the external mobile device to align the two cutter heads with the two preset parallel groove lines, and make the cutter heads contact the rock surface.

[0015] S2. Start the servo motor. The servo motor drives the main shaft sleeve to rotate through the drive shaft, main gear, chain and secondary gear. The copper rotors at both ends of the main shaft sleeve drive the permanent magnet rotors on both sides to rotate synchronously through the magnetic coupler, thereby driving the two cutter heads to cut the rock synchronously along two parallel groove lines.

[0016] S21. During the cutting process, the Hall sensor detects the pulse signal generated by the magnet on the secondary shaft sleeve in real time and calculates the actual rotation speed of the secondary shaft sleeve. This rotation speed is negatively correlated with the cutting resistance experienced by the cutter head. The rock hardness is inverted by the change in rotation speed, and it is determined whether the cutting path deviates from the boundary of the ore body. When the difference in rotation speed between the two cutter heads exceeds the preset threshold, it is determined that one cutter head has cut into the surrounding rock and the cutting path has deviated.

[0017] S3. During the cutting process along the groove line, the drive shaft drives the drive disc to rotate through the right angle reducer. The eccentric column on the drive disc drives the drive rod to reciprocate. The drive rod drives the two pressure plates to swing synchronously and periodically around the fixed axis. The lower end of the pressure plate is inserted into the two cutting grooves, applying alternating lateral compressive force to the sample block, causing the sample block to fatigue fracture from the weak point where it connects to the parent rock at the root.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The grooving sampling device and sampling method based on a dual-cutter head, as exemplified by this invention, achieves real-time independent detection of the rotational speeds of the two cutter heads by setting uniformly distributed magnets on the secondary shaft sleeve and a Hall sensor on the protective cover. Since the copper rotor and the permanent magnet rotor form a magnetic coupler, the transmitted torque is positively correlated with the slip. When the cutter head cuts rock, the greater the rock hardness and the greater the cutting resistance, the lower the rotational speed of the secondary shaft sleeve. Therefore, the rotational speed detected by the Hall sensor is negatively correlated with the rock hardness, and the rock hardness information of the cutting area can be retrieved in real time. Rock hardness data can be obtained without adding an additional sensor. The structure is compact and low-cost, and it can also provide data support for subsequent ore body boundary identification.

[0020] 2. The groove sampling device and sampling method based on a double cutter head, as exemplified by the present invention, uses two Hall sensors to detect the rotation speed of the left and right cutter heads respectively. When the two rotation speeds are similar, it indicates that the cutter heads on both sides are located inside the ore body with the same lithology. When the rotation speed of one side is significantly lower than that of the other side, it indicates that the cutter head on the side with the lower rotation speed has cut into the area of ​​harder surrounding rock, and the cutting path has deviated. This helps to ensure that all samples are taken from the ore body, avoids mixing with surrounding rock, significantly improves the representativeness of the samples, and is particularly suitable for the accurate sampling of thin vein ore bodies.

[0021] 3. The groove sampling device and sampling method based on a double cutterhead, as exemplified by this invention, can record and compare the curves of the rotational speed of the two auxiliary bushings as the feed position of the cutterhead changes. When the two rotational speeds decrease synchronously and remain close, it is determined that both cutterheads are located inside the ore body. When the rotational speed on one side changes abruptly while the other side remains stable, the boundary position of the ore vein at that point can be calculated based on the feed position corresponding to the point of rotational speed change. By comparing the distance between the points of rotational speed change on both sides, the thickness change trend of the ore vein can be inferred. Ore vein morphology information can be acquired simultaneously during the sampling process, providing dynamic data for the correction of the three-dimensional geological model, and continuous monitoring of the thickness change of thin vein ore bodies can be achieved.

[0022] 4. The groove sampling device and sampling method based on the double cutter head of the present invention integrates cutting, hardness detection and automatic separation into one unit. It uses the rotation speed of the double cutter head to detect and invert the rock hardness information of the cutting area in real time, thereby achieving efficient and accurate groove sampling, avoiding the mixing of surrounding rock, significantly improving the representativeness of the sample, saving manpower, improving work efficiency and being easy to use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the right-side structure of the present invention;

[0025] Figure 3 This is a partial structural diagram of the present invention;

[0026] Figure 4 for Figure 3 A partial structural diagram.

[0027] In the diagram: 1 Connecting frame, 2 Mounting frame, 21 Fixed shaft, 22 Protective cover, 3 Mounting shaft, 4 Main shaft sleeve, 41 Secondary gear, 42 Copper rotor, 43 Chain, 5 Secondary shaft sleeve, 51 Permanent magnet rotor, 52 Cutter head, 53 Magnet, 6 Hall sensor, 7 Servo motor, 71 Drive shaft, 72 Main gear, 73 Right angle reducer, 8 Drive disc, 81 Drive rod, 9 Pressure plate, 91 Connecting rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-4 This invention provides a technical solution: a groove sampling device based on a double-blade disc, including a mounting frame 2, a mounting shaft 3 mounted in the middle of the mounting frame 2, a main shaft sleeve 4 rotatably mounted in the middle of the mounting shaft 3, copper rotors 42 at both ends of the main shaft sleeve 4, and secondary shaft sleeves 5 rotatably mounted at both ends of the mounting shaft 3 inside the mounting frame 2, a permanent magnet rotor 51 corresponding to the copper rotor 42 at one end of the secondary shaft sleeve 5, and the copper rotor 42 and the permanent magnet rotor 51 form a magnetic coupler that uses slip characteristics to transmit torque and achieve overload protection, a blade disc 52 at the end of the secondary shaft sleeve 5 away from the permanent magnet rotor 51, a protective cover 22 covering the blade disc 52 on the mounting frame 2, uniformly distributed magnets 53 on the secondary shaft sleeve 5, and a Hall sensor 6 corresponding to the magnets 53 on the protective cover 22 for real-time detection of the rotation speed of the secondary shaft sleeve 5, and then inverting the rock hardness through the change in rotation speed.

[0030] The present invention uses a magnetic coupler to connect the main shaft sleeve 4 and the secondary shaft sleeve 5. The copper rotor 42 and the permanent magnet rotor 51 transmit torque through an air gap. When the cutter head 52 encounters jamming or overload, the magnetic coupler generates slippage to avoid the motor from burning out due to overload or the cutter head 52 from being damaged.

[0031] The mounting bracket 2 has two symmetrically arranged fixed shafts 21 on its side. A pressure plate 9 is rotatably mounted on the fixed shaft 21. A connecting rod 91 is installed at the upper end between the two pressure plates 9, and the pressure plate 9 and the connecting rod 91 are rotatably connected. The lower ends of the two pressure plates 9 are arranged opposite each other, which are used to insert into two parallel cutting grooves after cutting to apply symmetrical lateral extrusion force to the sample block.

[0032] The mounting bracket 2 is equipped with a driver that drives the spindle sleeve 4 and the pressure plate 9 to rotate.

[0033] Furthermore, the driver includes a servo motor 7 mounted on the mounting bracket 2. The output shaft of the servo motor 7 is mounted with a drive shaft 71 via a coupling. The drive shaft 71 is provided with a main gear 72, and the main shaft sleeve 4 is provided with a secondary gear 41 corresponding to the main gear 72. The main gear 72 and the secondary gear 41 are connected by a chain 43.

[0034] Furthermore, a bearing seat for fixing the drive shaft 71 is installed on the top of the protective cover 22. A right-angle reducer 73 is installed at the end of the drive shaft 71 away from the servo motor 7. A drive disk 8 is installed on the output shaft of the right-angle reducer 73. An eccentric column is installed on the drive disk 8. A drive rod 81 is rotatably mounted on the eccentric column. The end of the drive rod 81 away from the eccentric column is rotatably connected to the upper side of one of the pressure plates 9. The drive disk 8 and the eccentric column form an eccentric wheel mechanism. When the drive disk 8 rotates, the eccentric column drives the drive rod 81 to reciprocate, thereby driving the pressure plate 9 to swing periodically around the fixed shaft 21, so that the lower end of the pressure plate 9 applies alternating lateral extrusion force to the sample block in the cutting groove, causing the sample block to fatigue fracture from the root.

[0035] Furthermore, the mounting frame 2 is equipped with a connecting frame 1 for connecting external mobile devices. The top of the connecting frame 1 is provided with a mounting hole for inserting a screw. The connecting frame 1 is used to install the entire device on a robotic arm, a track-walking mechanism, or a manually held rod, so as to achieve precise positioning and feeding of the grooving sampling device on the surface of the ore body.

[0036] A sampling method for a groove sampling device based on a dual-blade disk includes the following steps:

[0037] S1. Fix the mounting bracket 2 to the external mobile device through the connecting bracket 1, drive the external mobile device to align the two cutter heads 52 with the two preset parallel groove lines, and make the cutter heads 52 contact the rock surface.

[0038] S2. Start the servo motor 7. The servo motor 7 drives the main shaft sleeve 4 to rotate through the drive shaft 71, main gear 72, chain 43 and auxiliary gear 41. The copper rotors 42 at both ends of the main shaft sleeve 4 drive the permanent magnet rotors 51 on both sides to rotate synchronously through the magnetic coupler, thereby driving the two cutter heads 52 to cut the rock synchronously along two parallel groove lines.

[0039] S21. During the cutting process, the Hall sensor 6 detects the pulse signal generated by the magnet 53 on the secondary shaft sleeve 5 in real time and calculates the actual rotation speed of the secondary shaft sleeve 5. This rotation speed is negatively correlated with the cutting resistance experienced by the cutter head 52. The rock hardness is inverted by the change in rotation speed, and it is determined whether the cutting path deviates from the boundary of the ore body. When the difference in rotation speed between the two cutter heads 52 exceeds the preset threshold, it is determined that one cutter head 52 cuts into the surrounding rock and the cutting path deviates.

[0040] S3. During the cutting process along the groove line, the drive shaft 71 drives the drive disk 8 to rotate through the right angle reducer 73. The eccentric column on the drive disk 8 drives the drive rod 81 to reciprocate. The drive rod 81 drives the two pressure plates 9 to swing synchronously and periodically around the fixed shaft 21. The lower end of the pressure plate 9 is inserted into the two cutting grooves, applying alternating lateral extrusion force to the sample block, causing the sample block to fatigue fracture from the weak point where it connects to the parent rock at the root.

[0041] This invention uses Hall sensor 6 to detect the cutter head rotation speed in real time to invert rock hardness and identify ore body boundaries. It also uses pressure plate 9 to apply alternating lateral extrusion force to the sample block to achieve automatic separation. It has the advantages of high sampling efficiency, good sample quality, and adaptability to thin vein ore bodies.

[0042] This invention integrates cutting, hardness detection, and automatic separation into one unit. It utilizes the rotational speed of a dual-blade disc to detect and invert the rock hardness information in the cutting area in real time, achieving efficient and accurate groove sampling, avoiding the mixing of surrounding rock, significantly improving sample representativeness, saving manpower, increasing work efficiency, and being easy to use. In addition, this invention adapts to different rock hardnesses through the slip characteristics of the magnetic coupler and detects changes in ore body boundaries through the rotational speed detection function. It is particularly suitable for the exploration of irregularly shaped deposits such as thin veins and chicken coops, and has good adaptability for the exploration and sampling of polymetallic minerals such as silver, gold, and copper.

[0043] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual cutterhead based slot sampling device comprising a mounting frame (2) characterised in that: The mounting frame (2) is equipped with a mounting shaft (3) in the middle. A main shaft sleeve (4) is rotatably mounted in the middle of the mounting shaft (3). Both ends of the main shaft sleeve (4) are equipped with copper rotors (42). Both ends of the mounting shaft (3) located inside the mounting frame (2) are rotatably equipped with secondary shaft sleeves (5). One end of the secondary shaft sleeve (5) is equipped with a permanent magnet rotor (51) corresponding to the copper rotor (42). The copper rotor (42) and the permanent magnet rotor (51) form a magnetic coupler that uses slip characteristics to transmit torque and achieve overload protection. The end of the secondary shaft sleeve (5) away from the permanent magnet rotor (51) is equipped with a cutter head (52). The mounting frame (2) is equipped with a protective cover (22) covering the cutter head (52). The secondary shaft sleeve (5) is equipped with uniformly distributed magnets (53). The protective cover (22) is equipped with a Hall sensor (6) corresponding to the magnets (53) for real-time detection of the rotation speed of the secondary shaft sleeve (5) and then inverting the rock hardness through the change in rotation speed. The mounting bracket (2) has two symmetrically arranged fixed shafts (21) on its side. A pressure plate (9) is rotatably arranged on the fixed shaft (21). A connecting rod (91) is installed at the upper end between the two pressure plates (9), and the pressure plate (9) is rotatably connected to the connecting rod (91). The lower ends of the two pressure plates (9) are arranged opposite each other, and are used to insert into two parallel cutting grooves after cutting to apply symmetrical lateral extrusion force to the sample block. The mounting bracket (2) is equipped with a driver that drives the main shaft sleeve (4) and the pressure plate (9) to rotate. The driver includes a servo motor (7) mounted on the mounting bracket (2). The output shaft of the servo motor (7) is connected to a drive shaft (71) via a coupling. The drive shaft (71) is equipped with a main gear (72). The main shaft sleeve (4) is equipped with a secondary gear (41) corresponding to the main gear (72). The main gear (72) and the secondary gear (41) are connected by a chain (43). The top of the protective cover (22) is equipped with a bearing seat for fixing the drive shaft (71). The drive shaft (71) is located away from the servo motor (7). One end is equipped with a right-angle reducer (73), and a drive disc (8) is installed on the output shaft of the right-angle reducer (73). An eccentric column is installed on the drive disc (8), and a drive rod (81) is rotatably arranged on the eccentric column. The end of the drive rod (81) away from the eccentric column is rotatably connected to the upper side of one of the pressure plates (9). The drive disc (8) and the eccentric column form an eccentric wheel mechanism. When the drive disc (8) rotates, the eccentric column drives the drive rod (81) to reciprocate, thereby driving the pressure plate (9) to swing periodically around the fixed shaft (21), so that the lower end of the pressure plate (9) applies alternating lateral extrusion force to the sample block in the cutting groove, causing the sample block to fatigue fracture from the root.

2. The dual-cutterhead based notch sampling device of claim 1, wherein: The mounting frame (2) is equipped with a connecting frame (1) for connecting external mobile devices. The top of the connecting frame (1) is provided with a mounting hole for inserting a screw. The connecting frame (1) is used to install the entire device on a robotic arm, a track walking mechanism, or a handheld rod to achieve precise positioning and feeding of the grooving sampling device on the surface of the ore body.

3. A method of sampling based on the dual cutterhead based slot sampling apparatus of claim 2, characterized by: Includes the following steps: S1. Fix the mounting bracket (2) to the external mobile device through the connecting bracket (1), drive the external mobile device to align the two cutter heads (52) with the two preset parallel groove lines, and make the cutter heads (52) contact the rock surface; S2. Start the servo motor (7). The servo motor (7) drives the main shaft sleeve (4) to rotate through the drive shaft (71), main gear (72), chain (43) and auxiliary gear (41). The copper rotors (42) at both ends of the main shaft sleeve (4) drive the permanent magnet rotors (51) on both sides to rotate synchronously through the magnetic coupler, thereby driving the two cutter discs (52) to cut the rock synchronously along two parallel groove lines. S21. During the cutting process, the Hall sensor (6) detects the pulse signal generated by the magnet (53) on the secondary shaft sleeve (5) in real time and calculates the actual rotation speed of the secondary shaft sleeve (5). This rotation speed is negatively correlated with the cutting resistance of the cutter head (52). The rock hardness is inverted by the change in rotation speed, and it is determined whether the cutting path deviates from the boundary of the ore body. When the difference in rotation speed between the two cutter heads (52) exceeds the preset threshold, it is determined that one cutter head (52) cuts into the surrounding rock and the cutting path deviates. S3. During the cutting process along the groove line, the drive shaft (71) drives the drive disk (8) to rotate through the right angle reducer (73). The eccentric column on the drive disk (8) drives the drive rod (81) to reciprocate. The drive rod (81) drives the two pressure plates (9) to swing synchronously and periodically around the fixed shaft (21). The lower end of the pressure plate (9) is inserted into the two cutting grooves, applying alternating lateral extrusion force to the sample block, causing the sample block to fatigue fracture from the weak point where it connects to the parent rock at the root.

Images