CN-122016372-A - Grooving sampling device and method based on double cutterheads

CN122016372ACN 122016372 ACN122016372 ACN 122016372ACN-122016372-A

Abstract

The invention relates to the technical field of geological exploration sampling, in particular to a grooving sampling device and a sampling method based on double cutterheads, comprising a mounting frame, wherein the middle part of the mounting frame is provided with a mounting shaft, the middle part of the mounting shaft is rotatably provided with a main shaft sleeve, both ends of the main shaft sleeve are provided with copper rotors, the installation axle is located the inside both ends of mounting bracket and all rotates and be provided with the auxiliary shaft sleeve, and the one end of auxiliary shaft sleeve is equipped with the permanent magnet rotor that corresponds the setting with the copper rotor, and the one end that the auxiliary shaft sleeve kept away from the permanent magnet rotor is equipped with the blade disc, is equipped with the protection casing of cover on the blade disc on the mounting bracket. According to the invention, cutting, hardness detection and automatic breaking are integrated, rock hardness information of an inversion cutting area is detected in real time by utilizing the rotating speed of the double cutterhead, and the boundary of a ore body is identified, so that efficient and accurate grooving sampling can be realized, the sampling efficiency is high, the sample quality is good, the manpower can be saved, and the working efficiency is improved.

Inventors

FENG RUI
WANG XIUQUAN
ZHENG BAOWEI
GUO RUI
YANG LIJUN
ZHAO JIAHAO

Assignees

河南发恩德矿业有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (5)

1. The grooving sampling device based on the double cutterheads comprises a mounting frame (2) and is characterized in that a mounting shaft (3) is mounted in the middle of the mounting frame (2), a main shaft sleeve (4) is rotatably arranged in the middle of the mounting shaft (3), copper rotors (42) are arranged at two ends of the main shaft sleeve (4), the mounting shaft (3) is rotatably arranged at two ends of the inside of the mounting frame (2), a secondary shaft sleeve (5) is rotatably arranged at one end of the secondary shaft sleeve (5), a permanent magnet rotor (51) which is correspondingly arranged with the copper rotors (42) is arranged at one end of the secondary shaft sleeve (5), the copper rotors (42) and the permanent magnet rotor (51) form a magnetic coupler which transmits torque by utilizing slip characteristics and realizes overload protection, a cutterhead (52) is arranged at one end, far away from the permanent magnet rotor (51), a protective cover (22) which is covered on the cutterhead (52) is arranged on the mounting frame (2), evenly distributed magnetic steel (53) is arranged on the secondary shaft sleeve (5), and a Hall sensor (6) which is correspondingly arranged with the magnetic steel (53) is arranged at the two ends of the protective cover (22) is used for detecting the change of the rotational speed of the secondary shaft sleeve (5) in real time and further through the change of the rotational speed of rock; Two symmetrically arranged fixed shafts (21) are arranged on the side face of the mounting frame (2), pressing plates (9) are rotatably arranged on the fixed shafts (21), connecting rods (91) are arranged at the upper ends between the two pressing plates (9), the pressing plates (9) are rotatably connected with the connecting rods (91), the lower ends of the two pressing plates (9) are oppositely arranged and are used for being inserted into two parallel cutting grooves after cutting is completed, and symmetrical lateral extrusion forces are applied to sample blocks; The mounting frame (2) is provided with a driver for driving the spindle sleeve (4) to rotate and the pressing plate (9) to rotate.
2. The grooving sampling device based on the double cutterhead according to claim 1, wherein the driver comprises a servo motor (7) mounted on a mounting frame (2), an output shaft of the servo motor (7) is provided with a driving shaft (71) through a coupler, a main gear (72) is arranged on the driving shaft (71), a secondary gear (41) which is arranged corresponding to the main gear (72) is arranged on a main shaft sleeve (4), and the main gear (72) is in transmission connection with the secondary gear (41) through a chain (43).
3. The grooving sampling device based on double cutterheads according to claim 2, wherein a bearing seat for fixing a driving shaft (71) is arranged at the top of the protection cover (22), a right-angle speed reducer (73) is arranged at one end, far away from a servo motor (7), of the driving shaft (71), a driving disc (8) is arranged on an output shaft of the right-angle speed reducer (73), an eccentric column is arranged on the driving disc (8), a driving rod (81) is rotatably arranged on the eccentric column, one end, far away from the eccentric column, of the driving rod (81) is rotatably connected with the upper end of the side face of one pressing plate (9), the driving disc (8) and the eccentric column form an eccentric wheel mechanism, when the driving disc (8) rotates, the eccentric column drives the driving rod (81) to reciprocate, and then the driving pressing plate (9) periodically swings around the fixing shaft (21), alternating lateral extrusion force is applied to sample blocks in the grooving at the lower end of the pressing plate (9), and fatigue fracture of the sample blocks from the root is promoted.
4. The grooving sampling device based on the double cutterheads of claim 3, wherein a connecting frame (1) connected with external mobile equipment is installed on the installation frame (2), a mounting hole for inserting a screw rod is formed in the top of the connecting frame (1), and the connecting frame (1) is used for installing the whole device on a mechanical arm, a track travelling mechanism or a manual hand-held rod piece, so that accurate positioning and feeding of the grooving sampling device on the surface of an ore body are realized.
5. A sampling method based on the grooving sampling device based on the double cutterhead as set forth in claim 4 is characterized by comprising the following steps: S1, fixing a mounting frame (2) on external mobile equipment through a connecting frame (1), driving the external mobile equipment to enable two cutterheads (52) to be aligned with two preset parallel groove lines, and enabling the cutterheads (52) to be in contact with the rock surface; s2, starting a servo motor (7), wherein the servo motor (7) drives a main shaft sleeve (4) to rotate through a driving shaft (71), a main gear (72), a chain (43) and a pinion (41), copper rotors (42) at two ends of the main shaft sleeve (4) drive permanent magnet rotors (51) at two sides to synchronously rotate through a magnetic coupler, and further drive two cutterheads (52) to synchronously cut rocks along two parallel grooving lines; S21, in the cutting process, a Hall sensor (6) detects pulse signals generated by magnetic steel (53) on an auxiliary shaft sleeve (5) in real time, calculates the actual rotation speed of the auxiliary shaft sleeve (5), the rotation speed is inversely related to cutting resistance borne by a cutter disc (52), inverts rock hardness through rotation speed change, judges whether a cutting path deviates from a boundary of a ore body according to the rock hardness, and judges that one cutter disc (52) cuts into surrounding rock and the cutting path deviates when the rotation speed difference of the cutter discs (52) at two sides exceeds a preset threshold value; S3, in the cutting process along the grooving line, a driving shaft (71) drives a driving disc (8) to rotate through a right-angle speed reducer (73), an eccentric column on the driving disc (8) drives a driving rod (81) to reciprocate, the driving rod (81) drives two pressing plates (9) to swing periodically around a fixed shaft (21) synchronously, the lower ends of the pressing plates (9) are inserted into two cutting grooves, alternating lateral extrusion force is applied to a sample block, and the sample block is subjected to fatigue fracture from the weak point of root and parent rock connection.

Description

Grooving sampling device and method based on double cutterheads Technical Field The invention relates to the technical field of geological exploration sampling, in particular to a grooving sampling device and a grooving sampling method based on double cutterheads. Background The grooving sampling is one of the most common sampling methods in solid mineral exploration, and the grade and reserve of mineral resources are evaluated by cutting a long groove into a mineral body and collecting all the cut ore fragments for chemical analysis. The technology is widely applied to engineering such as geological exploration, mine underground tunnels and the like. At present, the grooving sampling operation has the following problems that (1) a traditional manual grooving adopts a hammering chisel mode, an operator is required to keep a fixed posture for a long time for chisel, the traditional mechanical grooving equipment also commonly adopts a two-process separation mode of cutting firstly and then chisel, continuous automatic operation cannot be realized, the labor intensity is high, the working efficiency is low, (2) the section size of a sample groove is difficult to accurately control in the manual grooving process, so that the quality of each meter of extracted substances is unequal, the accuracy of grade calculation is directly affected, and (3) the operator cannot acquire the information of the rock hardness, the boundary position of a mineral body and the like of a current cutting area in the cutting process, can only judge by experience, can not identify the boundary of the mineral body in real time, and is extremely easy to mix with surrounding rock once the cutting path deviates from the direction of the mineral vein for thin vein mineral bodies, so that the sample representativeness is seriously affected. Patent number CN202410211504.1 discloses a double-piece score sampler with a memory cave wall, which guides a cutting machine through a guide plate, but cannot judge the hardness of rock in a cutting area in the cutting process, cannot identify the boundary of a ore body, and has a single function. Therefore, the present invention provides a grooving sampling device and a grooving sampling method based on a double cutter head, so as to solve the above-mentioned problems. Disclosure of Invention The invention aims to overcome the existing defects, and provides a grooving sampling device and a grooving sampling method based on double cutterheads, which are used for realizing efficient and accurate grooving sampling by integrating cutting, hardness detection and automatic breaking and utilizing the rotation speed of the double cutterheads to detect the hardness information of rock in an inversion cutting area in real time, avoiding surrounding rock mixing, remarkably improving the representativeness of a sample, saving manpower, improving the working efficiency, being convenient to use and effectively solving the problems in the background technology. The grooving sampling device comprises a mounting frame, wherein a mounting shaft is arranged in the middle of the mounting frame, a main shaft sleeve is rotatably arranged in the middle of the mounting shaft, copper rotors are arranged at two ends of the main shaft sleeve, the mounting shaft is rotatably arranged at two ends of the inside of the mounting frame, a secondary shaft sleeve is rotatably arranged at one end of the secondary shaft sleeve, a permanent magnet rotor which is correspondingly arranged with the copper rotors is arranged at one end of the secondary shaft sleeve, the copper rotors and the permanent magnet rotor form a magnetic coupler which transmits torque and realizes overload protection by utilizing slip characteristics, a cutter disc is arranged at one end of the secondary shaft sleeve, which is far away from the permanent magnet rotor, a protective cover covered on the cutter disc is arranged on the mounting frame, magnetic steel which is uniformly distributed is arranged on the secondary shaft sleeve, and Hall sensors which are correspondingly arranged with the magnetic steel are arranged on the protective cover and are used for detecting the rotating speed of the secondary shaft sleeve in real time, so that rock hardness is inverted by rotating speed change; the side of the mounting frame is provided with two symmetrically arranged fixed shafts, the fixed shafts are rotatably provided with pressing plates, the upper ends between the two pressing plates are provided with connecting rods, the pressing plates are rotatably connected with the connecting rods, the lower ends of the two pressing plates are oppositely arranged and are used for being inserted into two parallel cutting grooves after cutting is completed, and symmetrical lateral extrusion forces are applied to the sample blocks; the mounting frame is provided with a driver for driving the spindle sleeve to rotate and the pressing plate to rotate. As a preferable technical schem