A core cutting sampling device and method for field use

Abstract

The application relates to a core cutting and sampling device and method for field sites, wherein the core cutting and sampling device for field sites comprises a cutting table, a first three-axis linear module, a cutting machine and a pre-pressing suspension mechanism; the cutting table has a table top, and the table top is provided with a working space above; the first three-axis linear module is arranged on the cutting table, the first three-axis linear module has a moving connection end, the moving connection end is located above the table top of the cutting table, and the moving path of the moving connection end is a three-dimensional space moving path; the cutting machine is connected to the moving connection end, and the cutting machine is driven by the moving connection end to move in the working space according to the three-dimensional space moving path; the pre-pressing suspension mechanism is connected with the cutting machine and is configured to make the cutting machine move a predetermined distance in the vertically upward direction during core cutting and sampling, and exert a predetermined downward pressure on the cutting machine in the vertically downward direction. The application realizes core cutting and sampling in field sites, and the cutting surface of the core sample is more flat.

Description

Technical Field

[0001] This application belongs to the field of core sampling technology, specifically relating to a core cutting and sampling device and method for field use. Background Technology

[0002] In fields such as geological exploration, core sampling is a crucial step in obtaining key data about rock strata, and the quality of the sample directly affects the results of subsequent laboratory analysis. Currently, commonly used core cutting equipment involves directly cutting the core with a cutting machine. However, due to the complexity of geology, the core may contain some hard particles (such as quartz particles, siliceous nodules, etc.).

[0003] When the cutting machine blade comes into contact with hard particles, the rigid cutting mechanism of traditional equipment causes the instantaneous impact load of the hard particles on the blade to be directly transmitted to components such as the spindle and guide rails during the core cutting process. This can easily lead to blade chipping, deformation of transmission components, and deviation of the cutting path, resulting in uneven core sample end faces or exceeding dimensional limits, and in severe cases, damage to the core sample structure. Therefore, there is an urgent need for a core cutting and sampling device for field use. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a core cutting and sampling device for field use, in order to solve the problems in the prior art where hard rock cores cause damage to the cutting blades and deviation of the cutting path when the cutting machine cuts into hard rock cores.

[0005] The objective of this invention is achieved as follows:

[0006] On the one hand, a core cutting and sampling device for field use is provided, comprising:

[0007] A cutting table with a work surface and a workspace above the work surface;

[0008] A first three-axis linear module is disposed on the cutting table. The first three-axis linear module has a movable connecting end, which is located above the table surface of the cutting table, and the moving path of the movable connecting end is a three-dimensional spatial moving path.

[0009] A cutting machine is connected to the movable connection end of the first three-axis linear module. The movable connection end of the first three-axis linear module drives the cutting machine to move within the workspace above the table according to a three-dimensional spatial movement path.

[0010] A pre-compression suspension mechanism, connected to the cutting machine, is configured to move the cutting machine a predetermined distance in the vertically upward direction during core cutting and sampling, and to apply a predetermined downward pressure to the cutting machine in the vertically downward direction.

[0011] In the field core cutting and sampling device provided in this application, the first three-axis linear module includes a cross linear module and a vertical linear module. The cross linear module is disposed on the cutting table, and the vertical linear module is connected to the cross linear module. A mounting platform is connected to the vertical linear module, and the mounting platform can move vertically through the vertical linear module. The movable connection end includes the mounting platform, and the cutting machine is mounted on the mounting platform.

[0012] In the field core cutting and sampling device provided in this application, the vertical linear module includes two vertical rails and two vertical slides. The two vertical rails are spaced apart along the length of the cutting table, and the vertical slides are slidably connected to the vertical rails. The movable connection end also includes a counterweight platform with the same structure as the mounting platform. The mounting platform and the counterweight platform are respectively connected to one of the vertical slides, and the counterweight platform is provided with counterweights.

[0013] In the field core cutting and sampling device provided in this application, the main shaft of the cutting machine extends to one end of the counterweight and is rotatably connected to the counterweight, and the blade of the cutting machine is disposed in the gap between the mounting platform and the counterweight platform.

[0014] In the field core cutting and sampling device provided in this application, the pre-compression suspension mechanism includes two parts, which are symmetrically arranged on the main shaft on both sides of the blade.

[0015] In the field core cutting and sampling device provided in this application, the pre-compression suspension mechanism includes:

[0016] A high-speed bearing is connected to the main shaft of the cutting machine;

[0017] A guide rail is provided on the outside of the high-speed bearing. The two opposite ends of the outer ring of the high-speed bearing are respectively embedded in the two inner grooves of the guide rail. The high-speed bearing is slidably connected to the guide rail.

[0018] The disc spring mechanism has one end connected to the outer ring of the high-speed bearing, and the other end connected to the fixed frame.

[0019] The mounting platform and the counterweight platform are respectively connected to the guide rail of one of the pre-compression suspension mechanisms.

[0020] In the field core cutting and sampling device provided in this application, the disc spring mechanism includes a limiting seat, a fixed sleeve, a flat cover ring, a movable shaft, multiple sets of disc springs, an adjusting nut, and a connecting seat. The bottom of the limiting seat has a groove, and the bottom groove of the limiting seat is fixedly connected to the outer ring of the high-speed bearing. One end of the fixed sleeve is connected to the top of the limiting seat, and the other end is connected to the flat cover ring. The movable shaft is movably inserted into the fixed sleeve. Multiple sets of disc springs are sleeved on the movable shaft. The outer wall of the top end of the movable shaft is threaded. The adjusting nut is threaded onto the movable shaft. The disc springs are located between the adjusting nut and the flat cover ring, and the setting position of the adjusting nut allows the disc springs to have preload force. The movable shaft is connected to the connecting seat, and the connecting seat is connected to the fixing frame and fixes the connecting seat.

[0021] The field core cutting and sampling device provided in this application also includes a groove opening mechanism, which is set on the cutting table and is used to pre-open a stress groove to release the core stress at the position where the cutting machine cuts the core.

[0022] In the field core cutting and sampling device provided in this application, the slot opening mechanism includes a driver and a V-shaped grinding head. The V-shaped grinding head is connected to the rotation shaft of the driver, and the driver is located at the bottom of the cutting table.

[0023] The field core cutting and sampling device provided in this application also includes a packaging mechanism for packaging the core samples cut by the cutting machine; the packaging mechanism includes:

[0024] The second and third-axis linear module is mounted on the cutting table;

[0025] The control panel is connected to the second and third axis linear modules;

[0026] Four side rods are provided, with two side rods spaced apart on one side of the operating table and the other two side rods provided on the other side of the operating table. The side rods are provided along the length of the core sample.

[0027] A cross slide is arranged parallel to the bottom surface of the side rod, and the cross slide is connected to the bottom of the side rod;

[0028] A vertical drive mechanism is mounted on the cross slide.

[0029] The vertical rod is driven and connected to the vertical drive mechanism, which is used to drive the vertical rod to move vertically. The end of the vertical rod near the rock core is bent inward, and the four vertical rods are located on both sides of the rock core.

[0030] On the other hand, this application also provides a method for core cutting and sampling in the field, which uses the above-mentioned core cutting and sampling device to perform core cutting and sampling in the field.

[0031] The field core cutting and sampling method provided in this application includes the following steps: placing the core to be cut into the groove of the core clamp;

[0032] The first three-axis linear module is activated to drive the cutting machine to move and align with the predetermined cutting position of the rock core, wherein the cutting path is determined to be perpendicular to the radial direction of the rock core;

[0033] The cutting machine is driven to move vertically up and down by the first three-axis linear module, and the distance between the cutting machine blade and the rock core surface is controlled at 1-2mm. After adjustment, the position of the first three-axis linear module in the vertical direction is locked.

[0034] Start the cutting machine and keep it running continuously after the blade speed stabilizes at the rated value.

[0035] Start the first three-axis linear module to drive the cutting machine to feed downwards at a constant speed in the vertical direction, so that the cutting machine blades gradually cut into the rock core to advance the cutting operation;

[0036] During the cutting process, the blade contacts the hard particles in the rock core. The instantaneous impact force pushes the cutting machine upward to compress the pre-compression suspension mechanism, causing the cutting machine to move a predetermined distance in the vertical upward direction. The pre-compression suspension mechanism directly absorbs the impact load to prevent the impact from being transmitted to the first three-axis linear module. When the impact load disappears, the rebound force of the pre-compression suspension mechanism pushes the cutting machine to reset vertically downward, so that the blade always maintains stable contact with the surface of the rock core.

[0037] After the cutting machine has been fed to the end along the core axis to complete the cutting of the entire core, the cutting machine is turned off and the blade stops rotating completely. The cutting machine is then driven vertically upward to a safe height above the top of the core by the first three-axis linear module, and then driven to return to the initial position in the horizontal direction.

[0038] This application provides a field core cutting and sampling device. The core to be cut is placed on a core clamp 53 on the cutting table. The core clamp 53 has a groove in which the core is placed. The first three-axis linear module is activated, first driving the cutter to move to a predetermined radial cutting position aligned with the core. Then, the cutter is driven to rise and fall, controlling the distance between the blade and the core surface to 1-2 mm. The cutter is started, and after the blade speed reaches its rated value, the first three-axis linear module is activated, driving the cutter to feed at a uniform speed along the core axis. If the blade contacts hard particles during cutting, the impact force pushes the cutter to compress the pre-pressure suspension mechanism, moving it vertically upward a predetermined distance. After the impact disappears, the elastic force of the pre-pressure suspension mechanism pushes the cutter downward vertically to reset, maintaining stable contact between the blade and the core until the entire core is cut. After cutting, the cutter is first turned off, and after the blade stops rotating, the first three-axis linear module drives the cutter to rise, then drives it back to the initial position. This application utilizes a pre-pressure suspension mechanism to directly absorb the instantaneous impact of hard particles on the cutting blade, preventing the impact load from being transmitted to the first three-axis linear module. This prevents cutting path deviation and protects the cutting blade from chipping and the spindle from deformation. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0040] Figure 1 A schematic diagram of the overall structure of the field core cutting and sampling device provided by the present invention;

[0041] Figure 2 A partial structural schematic diagram of the field core cutting and sampling device provided by the present invention;

[0042] Figure 3 A schematic diagram of the cutting machine and packaging mechanism of the field core cutting and sampling device provided by the present invention;

[0043] Figure 4 for Figure 3 A magnified schematic diagram of the structure of part A in the diagram;

[0044] Figure 5 for Figure 2 A magnified schematic diagram of the partial structure of B in the diagram;

[0045] Figure 6 for Figure 3 A schematic diagram of the packaging mechanism;

[0046] Figure 7 for Figure 6 A schematic diagram of the vertical drive mechanism.

[0047] Figure label:

[0048] 10. Cutting table; 11. Mounting table; 12. Counterweight table;

[0049] 20. First three-axis linear module; 201. Cross linear module; 202. Vertical linear module; 203. Vertical track; 204. Vertical slide; 205. Counterweight;

[0050] 30. Cutting machine; 301. Spindle; 302. Blade;

[0051] 40. Pre-loaded suspension mechanism; 401. High-speed bearing; 402. Guide rail; 403. Limiting seat; 404. Fixing sleeve; 405. Flat cover ring; 406. Movable shaft; 407. Disc spring; 408. Adjusting nut; 409. Connecting seat;

[0052] 50. Core; 51. Core segment; 52. Protective sleeve; 53. Core clamp;

[0053] 60. Driver; 61. V-shaped grinding head; 62. Outer support arm; 63. Retracting motor; 64. Directional shaft; 65. Synchronous belt; 66. Mounting arm;

[0054] 70. Second and third axis linear module; 71. Operating table; 72. Side rod; 73. Cross slide; 74. Vertical drive mechanism; 75. Vertical rod; 76. Drive housing; 77. Drive motor. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0057] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “(the)” are also intended to include the plural forms. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0058] A specific embodiment of the present invention, such as Figures 1 to 7 As shown, a core cutting and sampling device for field use is disclosed, including a cutting table 10, a first three-axis linear module 20, a cutting machine 30, and a pre-compression suspension mechanism 40;

[0059] The cutting table 10 has a tabletop and a workspace above the tabletop;

[0060] A first three-axis linear module 20 is disposed on the cutting table 10. The first three-axis linear module 20 has a movable connection end, which is located above the table surface of the cutting table 10, and the movable connection end has a three-dimensional spatial movement path.

[0061] A cutting machine is connected to the movable connection end of the first three-axis linear module. The movable connection end of the first three-axis linear module drives the cutting machine to move within the workspace above the table according to a three-dimensional spatial movement path.

[0062] The pre-compression suspension mechanism 40 is connected to the cutter 30 and is configured to move the cutter 30 a predetermined distance in the vertically upward direction during core cutting and sampling, and to apply a predetermined downward pressure to the cutter 30 in the vertically downward direction.

[0063] It should be noted that the moving path of the moving connection end of the first three-axis linear module 20 is a three-dimensional spatial moving path, which means that the coordinates of any position on the moving path are three-dimensional coordinates, and it can move in the xyz three-dimensional space. In other words, the moving connection end of the first three-axis linear module 20 can drive the cutting machine 30 to move to any position in the workspace above the cutting table 10.

[0064] Before starting the equipment, confirm that the pre-pressure suspension mechanism 40 has been set with the predetermined downward pressure and vertical movement distance. For example, when cutting a 20cm diameter core 50, a downward pressure of 80-150N is sufficient to ensure that the blade 302 of the cutting machine 30 is in close contact with the surface of the core 50. Insufficient downward pressure will cause a gap between the blade 302 and the core 50, resulting in empty cutting and ineffective cutting. Excessive downward pressure will cause the blade 302 to crush the core 50 or excessively wear the blade edge. The predetermined vertical upward movement distance of the cutting machine 30 is a buffer space for the blade 302 along the vertical direction. When the blade 302 encounters hard particles, it can move upward to avoid impact and prevent the blade 302 from directly bearing the impact load.

[0065] The core 50 to be cut is placed on the core clamp 53 of the cutting table 10. The core clamp 53 has a groove, and the core 50 is placed in the groove. Fixing claws can be arranged on both sides of the core clamp 53 to fix the core 50. Existing claws can be used for fixing.

[0066] Start the first three-axis linear module 20, first drive the cutting machine 30 to move to the radial predetermined cutting position aligned with the core 50; then drive the cutting machine 30 to rise and fall, so that the distance between the blade 302 and the surface of the core 50 is controlled at 1-2mm; start the cutting machine 30, and after the blade 302 reaches the rated speed, start the first three-axis linear module 20, and drive the cutting machine 30 to feed at a constant speed along the axis of the core 50; if the blade 302 contacts hard particles during cutting, the impact force pushes the cutting machine 30 to compress the pre-pressure suspension mechanism 40, and moves it upward a predetermined distance in the vertical direction; after the impact disappears, the elastic force of the pre-pressure suspension mechanism 40 pushes the cutting machine 30 to reset downward in the vertical direction, maintaining stable contact between the blade 302 and the core 50, until the cutting of the entire core 50 is completed;

[0067] After the cutting is completed, the cutting machine 30 is turned off first. After the blade 302 stops rotating, the cutting machine 30 is driven to rise through the first three-axis linear module 20, and then the cutting machine 30 is driven to return to the initial position.

[0068] A drive motor can also be installed at one end of the core clamp 53. After the core 50 is cut, it will push the next section of core 50 to the cutting position. This configuration can shorten the length of the first three-axis linear module 20 in the length direction of the cutting table 10.

[0069] The pre-pressure suspension mechanism 40 directly absorbs the instantaneous impact of hard particles on the blade 302, preventing the impact load from being transmitted to the first three-axis linear module 20. This prevents the cutting path from deviating and protects the blade 302 from chipping and the spindle 301 from deformation.

[0070] In some embodiments, the cutting table 10 is composed of multiple cutting tables joined together, improving the portability of the cutting table 10 in the field. The cutting table 10 can be installed on-site in the field.

[0071] The cutting machine 30 includes a cutting motor, a spindle 301, and a blade 302. The cutting motor is driven and connected to the spindle 301, and the spindle 301 is connected to the blade 302. The cutting motor drives the blade 302 to rotate. The cutting machine 30 may also include a dust cover, a transmission structure, and other structures.

[0072] In some embodiments, the first three-axis linear module 20 includes a cross-shaped linear module 201 and a vertical linear module 202. The cross-shaped linear module 201 is disposed above the table surface of the cutting table 10. The vertical linear module 202 is connected to the cross-shaped linear module 201 and can move along the cross-shaped linear module 201 in a plane parallel to the table surface. A mounting platform 11 is connected to the vertical linear module 202. The mounting platform 11 can move in the vertical direction through the vertical linear module 202. The movable connection end of the first three-axis linear module 20 includes the mounting platform 11, and the cutting machine 30 is mounted on the mounting platform 11.

[0073] It should be noted that the cross-shaped linear module 201 used in this embodiment is an existing structure, and movement within a plane is achieved through the cross-shaped linear module 201. In this embodiment, the cross-shaped linear module 201 is mounted above the table surface of the cutting table 10 via a column, and the column is installed on the table surface of the cutting table 10 by fasteners. One of the slide rails of the cross-shaped linear module 201 is arranged along the length direction of the cutting table 10, and the other slide rail is arranged along the width direction of the cutting table 10, with the slide rail arranged along the width direction of the cutting table 10 located at the top.

[0074] In some embodiments, the cutting machine is further provided with a counterweight 205. In the technical solution of setting the counterweight, the number of pre-pressure suspension mechanisms 10 is two. Specifically, the vertical linear module 202 includes two vertical rails 203 and two vertical slides 204. The two vertical rails 203 are spaced apart along the length direction of the cutting table 10. The vertical slides 204 are slidably connected to the vertical rails 203. The movable connection end of the first three-axis linear module 20 also includes a counterweight platform 12 with the same structure as the mounting platform. The mounting platform 11 and the counterweight platform 12 are respectively connected to a vertical slide 204 and are both inserted through the vertical rails 203. The mounting platform 11 and the counterweight platform 12 face two directions. A vertical track 203 is extended at intervals. The cutting machine 30 is mounted on the mounting platform 11. A counterweight 205 is provided on the counterweight platform 12. The main shaft 301 of the cutting machine 30 extends to one end of the counterweight 205 and is rotatably connected to the counterweight 205. The blade 302 of the cutting machine 30 is set in the gap between the mounting platform 11 and the counterweight platform 12. Two pre-pressure suspension mechanisms 40 are symmetrically arranged on the main shaft 301 on both sides of the blade 302. The two pre-pressure suspension mechanisms 40 are respectively connected to the mounting platform 11 and the counterweight platform 12.

[0075] Two vertical rails 203 are respectively set at opposite ends of the slide rails arranged along the width direction of the cutting table 10 of the cross-shaped linear module 201. Both the mounting platform 11 and the counterweight platform 12 are provided with through holes, through which the vertical rails 203 pass. After the mounting platform 11 and the counterweight platform 12 are connected to the vertical slide block 204, the vertical slide block 204 can drive the mounting platform 11 and the counterweight platform 12 to move on the vertical rails 203. The vertical slide block 204 also adopts the existing structure, with a built-in drive motor 77, enabling the vertical slide block 204 to slide and hover on the vertical rails 203.

[0076] The weight of the counterweight 205 is the same as the weight of the cutting motor of the cutting machine 30. The side of the counterweight 205 facing the mounting table 11 is provided with a fixing groove, and a connecting bearing is fixedly connected in the fixing groove. The main shaft 301 of the cutting machine 30 is connected to the inner ring of the connecting bearing, so that the main shaft 301 and the counterweight 205 are rotatably connected together.

[0077] By setting two pre-pressure suspension mechanisms 40, the force on both sides of the blade 302 is balanced when it is under force, and the force on both ends of the spindle 301 is uniform. This avoids eccentric rotation of the spindle 301 caused by unilateral buffering, reduces uneven wear of the blade 302, and improves the flatness of the cutting end face. After adding the counterweight 205, the pre-pressure and movement distance of the pre-pressure suspension mechanism 40 are readjusted. After the readjustment is completed, a test cut is performed on site, and further adjustments are made.

[0078] In some embodiments, the pre-pressure suspension mechanism 40 includes a high-speed bearing 401, a guide rail 402, and a disc spring mechanism; the high-speed bearing 401 is connected to the main shaft 301 of the cutting machine 30; the guide rail 402 is disposed on the outside of the high-speed bearing 401, and the guide rail 402 has an installation space for installing the high-speed bearing 401. The inner wall of the installation space has two oppositely arranged inner grooves, and the opposite ends of the outer ring of the high-speed bearing 401 are respectively embedded in the two inner grooves of the guide rail 402, and the high-speed bearing 401 is slidably connected to the guide rail 402; one end of the disc spring mechanism is connected to the outer ring of the high-speed bearing 401, and the opposite end is connected to the fixing frame for fixation; wherein, the mounting platform 11 and the counterweight platform 12 are respectively connected to one of the guide rails 402 of the pre-pressure suspension mechanism 40.

[0079] When the blade 302 encounters hard particles during the cutting process, the impact force pushes the blade 302 to move the spindle 301 upward. The spindle 301 drives the inner ring of the high-speed bearing 401 upward, and the outer ring of the bearing slides vertically upward along the inner groove of the guide rail 402. At the same time, the disc spring mechanism is compressed. After the impact load disappears, the rebound force of the disc spring mechanism pulls the outer ring of the bearing downward along the guide rail 402, driving the spindle 301 and the blade 302 to reset. Throughout the process, the inner ring of the high-speed bearing 401 rotates with the spindle 301, while the outer ring only slides along the guide rail 402 without rotation.

[0080] The guide rail 402 restricts the high-speed bearing 401 to slide only in the vertical direction, preventing the spindle 301 from shifting laterally during buffering, preventing the blade 302 from being misaligned with the core 50 for cutting, and ensuring the accuracy of the cutting path;

[0081] By replacing the disc springs 407 with different stiffnesses, the preload can be adjusted to suit the cutting needs from soft rock (containing a small amount of quartz particles) to hard rock (containing a large amount of siliceous nodules), avoiding excessive preload that would overload the blade 302, and insufficient preload that would cause discontinuous cutting.

[0082] The high-speed bearing 401 isolates the rotation and buffer sliding motion of the spindle 301, avoiding the fluctuation of the spindle 301 speed caused by the high-speed bearing 401 jamming during buffering, protecting the transmission accuracy of the spindle 301 and extending the service life of the spindle 301.

[0083] The pre-pressure suspension mechanism 40 is located on the spindle 301 near the blade 302, enabling the buffering and pre-pressure functions to be applied directly to the impact source and the cutting execution end. The downward pressure of the pre-pressure mechanism acts directly on the section of the spindle 301 near the blade 302, shortening the force transmission path and eliminating unnecessary transmission component losses. When the blade 302 encounters hard particles, the impact acts directly on the spindle 301 near the blade. The mechanism can respond instantly; the outer ring of the high-speed bearing 401 immediately slides upward along the guide rail 402, and the disc spring mechanism synchronously compresses and absorbs the impact, eliminating the need for intermediate transmission components and reducing damage to the blade 302 and spindle 301 from the source. This avoids delays, deviations, and force losses in intermediate transmission links and isolates the impact from damage to critical components such as the motor and module. If located on the motor or other positions, the effect would be less than if it were located on the spindle 301.

[0084] In some embodiments, the disc spring mechanism includes a limiting seat 403, a fixed sleeve 404, a flat cover ring 405, a movable shaft 406, multiple sets of disc springs 407, an adjusting nut 408, and a connecting seat 409. The bottom of the limiting seat 403 has a groove, and the bottom groove of the limiting seat 403 is fixedly connected to the outer ring of the high-speed bearing 401. One end of the fixed sleeve 404 is connected to the top of the limiting seat 403, and the other end is connected to the flat cover ring 405. The movable shaft 406 is movably inserted into the fixed sleeve 404. Multiple sets of disc springs 407 are sleeved on the movable shaft 406. The outer wall of the top end of the movable shaft 406 is threaded. The adjusting nut 408 is threadedly connected to the movable shaft 406. The disc springs 407 are located between the adjusting nut 408 and the flat cover ring 405, and the setting position of the adjusting nut 408 makes the disc springs 407 have preloaded elasticity. The movable shaft 406 is connected to the connecting seat 409, and the connecting seat 409 is connected to the fixing frame and fixes the connecting seat 409.

[0085] By adjusting the distance between the adjusting nut 408 and the flat cover ring 405, the disc spring 407 between them can be compressed to generate different preloads. When the high-speed bearing 401 moves upward, it drives the limit seat 403 and the fixed sleeve 404 to move upward. The fixed sleeve 404 moves relative to the movable shaft 406, and at the same time, the flat cover ring 405 on the fixed sleeve 404 moves upward to compress the disc spring 407, thus creating a buffer. Due to the deformation characteristics of the disc spring 407, it stops compressing after a certain degree, thus limiting and stopping the fixed sleeve 404 and the high-speed bearing 401. This prevents the blade 302 from moving upward too much and the high-speed bearing 401 from moving upward too much and falling off the guide rail 402.

[0086] In some embodiments, the disc spring mechanism in the pre-compression suspension mechanism 40 can be replaced by a spring mechanism. The spring mechanism has the same structure as the disc spring mechanism, except that the disc spring 407 is replaced by a spring. The spring is also sleeved on the outside of the fixed sleeve 404, and one end of the spring abuts against the flat cover ring 405, while the other end abuts against the adjusting nut 408.

[0087] In this embodiment, a cover can also be provided on the top of the guide rail 402, and a fixing sleeve 404 is inserted through the cover, which limits the position of the limiting seat 403.

[0088] In some embodiments, a groove opening mechanism is also included, which is disposed on the cutting table 10, for pre-opening a stress groove at the position where the cutting machine 30 cuts the core 50 to release the stress of the core 50.

[0089] Start the groove opening mechanism to grind out the stress groove at the predetermined cutting position of the core 50; during the grinding process, the V-shaped grinding head 61 is opened around the side wall of the core 50 to ensure the continuity of the stress groove. The opened stress groove is arc-shaped with a depth of 5mm and a width of 3mm; after the stress groove is opened, close the groove opening mechanism and start the cutting machine 30 again, so that the blade 302 is aligned with the bottom of the stress groove and the cutting is completed according to the normal process.

[0090] The stress groove releases the internal stress of the core 50 in advance, especially for cores 50 containing hard particles. It can disperse the local stress around the particles and prevent the core 50 from cracking due to sudden stress release during cutting; it further reduces cutting resistance and protects the blade 302.

[0091] The slot opening mechanism includes a driver 60 and a V-shaped grinding head 61. The V-shaped grinding head 61 is connected to the rotation shaft of the driver 60, and the driver 60 is located at the bottom of the cutting table 10.

[0092] The driver 60 is located at the bottom of the cutting table 10. The included angle of the V-shaped grinding head 61 is 60° and the diameter of the V-shaped grinding head 61 is 10mm. The V-shaped grinding head 61 is fixed coaxially with the output shaft of the driver 60 through a chuck. The driver 60 can be a servo motor.

[0093] Start the driver 60 to drive the V-shaped grinding head 61 to rotate at 4500 r / min; drive the V-shaped grinding head 61 to the starting point of the pre-grooving position on the side wall of the core 50 through the first three-axis linear module 20, so that the tip of the V-shaped grinding head 61 contacts the surface of the core 50, and grind out a stress groove with a V-shaped cross section, a groove bottom width of 2 mm, a groove opening width of 8 mm, and a depth of 5 mm; monitor the groove depth in real time during grinding, and make fine adjustments through the first three-axis linear module 20 to ensure uniform groove depth; after the V-shaped stress groove is opened, the driver 60 stops rotating, the bottom of the V-shaped stress groove is aligned with the blade 302 of the cutting machine 30, and cutting is started.

[0094] Compared to a standard straight-groove V-shaped grinding head 61, the V-groove of the V-shaped grinding head 61 has a wider opening, significantly expanding the stress release range. This eliminates localized stress concentration in the core 50, preventing cracking of the core 50 after cutting due to residual stress. Simultaneously, it provides a clear cutting guide for the cutting tool 302, preventing it from deviating from its path due to impacts from hard particles. The driver 60 and V-shaped grinding head 61 can be achieved using commercially available equipment, or a vertical milling cutter can be used for grooving.

[0095] In some embodiments, the mounting platform 11 is further equipped with two outer support arms 62, which are parallel and inclined downwards. A retraction motor 63 is installed between the two outer support arms 62. The outer ends of the outer support arms 62 are provided with a directional shaft 64, and the two ends of the directional shaft 64 are respectively rotatably connected to the two outer support arms 62. One end of the directional shaft 64 extends through the side of one outer support arm 62 away from the other. The drive shaft of the retraction motor 63 also extends through the side of one outer support arm 62 away from the other. A synchronous belt 65 is fitted on the portion of the directional shaft 64 and the retraction motor 63 that extends through the outer support arms 62, so that the rotation of the retraction motor 63 can drive the directional shaft 64 to rotate. Two mounting arms 66 are connected to the directional shaft 64, and a driver 60 is installed between the two mounting arms 66. The retraction motor 63 can drive the directional shaft 64 to rotate, thereby driving the driver 60 to switch between the bottom and the upper side of the mounting platform 11. When the driver 60 moves to the cutting position directly below the mounting platform 11, the driver 60 is located in the center of the mounting platform 11 and is perpendicular to the mounting platform 11, while the mounting arm 66 is parallel to the mounting platform 11. At this time, the driver 60 can drive the V-shaped grinding head 61 to open the stress groove. When opening the stress groove, the first three-axis linear module 20 drives the driver 60 to open an arc-shaped groove that conforms to the shape of the side wall of the core 50. Since the first three-axis linear module 20 can drive the driver 60 to move arbitrarily in space, the route setting for opening the stress groove can be achieved by adjusting the parameters of the control terminal. After the stress groove is opened, the direction axis 64 rotates to drive the driver 60 back to the top of the mounting platform 11, avoiding interference caused by the driver 60 touching the core 50 when the blade 302 is cutting the core 50.

[0096] In some embodiments, a packaging mechanism is also included for packaging the core sample 50 cut by the cutting machine 30.

[0097] Packaging organizations include:

[0098] The second and third axis linear module 70 is set on the cutting table 10;

[0099] The control panel 71 is connected to the second three-axis linear module 70;

[0100] Four side rods 72 are provided, with two side rods 72 spaced apart on one side of the operating table 71, and the other two side rods 72 are provided on the other side of the operating table 71. The side rods 72 are provided along the length of the core 50.

[0101] The cross slide 73 is set parallel to the bottom surface of the side rod 72 and is connected to the bottom of the side rod 72.

[0102] The vertical drive mechanism 74 is mounted on the cross slide table 73;

[0103] The vertical rod 75 is driven by the vertical drive mechanism 74, which is used to drive the vertical rod 75 to move vertically. The end of the vertical rod 75 near the core 50 is bent inward, and the four vertical rods 75 are located on both sides of the core 50.

[0104] The vertical drive mechanism 74 includes a drive housing 76 and a drive motor 77. The vertical rod 75 is inserted into the drive housing 76. The drive housing 76 has an opening. The drive end of the drive motor 77 is connected to a gear. The gear meshes with a part of the vertical rod 75 located inside the drive housing 76 through the opening. The vertical rod 75 has a tooth groove corresponding to the gear.

[0105] The vertical drive mechanism 74 can also adopt an existing structure, such as a telescopic motor directly driving the vertical rod 75 to move up and down.

[0106] After cutting the core segment 51, the operator first pushes the core segment 51 away from the core 50 by a predetermined distance. The second three-axis linear module 70 moves the four side rods 72 to a position above the core segment 51. The second three-axis linear module 70 is an existing structure that can realize longitudinal, lateral, and vertical movement functions. The end of the core segment 51 furthest from the uncut core 50 is designated as the head end, and the opposite end is designated as the tail end. First, the two cross slides 73 above the head end of the core segment 51 drive the vertical drive mechanism 74 to move to the opposite sides of the core segment 51. The vertical drive mechanism 74 drives the vertical rod 75 to descend below the axis of the core segment 51. The two cross slides 73 move closer to the core segment 51 and retract, so that the vertical rod 75 clamps the core segment 51 in a gripper-like manner. The vertical drive mechanism 74 drives the vertical rod 75 to rise, so that the head end of the core segment 51 is lifted and separated from the core clamp 53. At this time, a protective sleeve 52 is placed at the head end of the core segment 51 and abuts against the head end of the core segment 51. Two cross slides 73 corresponding to the tail end of core segment 51 drive the vertical drive mechanism 74 and the vertical rod 75 to move to a position close to the tail end of core segment 51. Then, the cross slides 73, in conjunction with the vertical rod 75, push the core segment 51 into the protective sleeve 52. The tail end of the protective sleeve 52 is pressed against by the operator, allowing the head end of the core segment 51 to enter the protective sleeve 52. By controlling the cross slides 73 to drive the vertical rod 75 away from the core segment 51, the operator pushes the remaining part of the core segment 51 into the protective sleeve 52, completing the packaging of the core segment 51. Alternatively, the cross slides 73 can be used again to drive the vertical rod 75 to press against the tail end of the core segment 51, pushing the remaining part of the core segment 51 into the protective sleeve 52.

[0107] This application provides a method for cutting and sampling rock cores in the field, including the following steps: placing the rock core 50 to be cut into the groove of the rock core clamp 53;

[0108] The first three-axis linear module 20 is activated, driving the cutter 30 to move and align with the predetermined cutting position of the core 50, wherein the cutting path is determined to be perpendicular to the radial direction of the core 50;

[0109] The first three-axis linear module 20 drives the cutting machine 30 to move vertically up and down, controlling the distance between the blade 302 of the cutting machine 30 and the surface of the core 50 to 1-2mm. After adjustment, the position of the first three-axis linear module 20 in the vertical direction is locked.

[0110] Start the cutting machine 30, and after the rotation speed of the blade 302 of the cutting machine 30 stabilizes at the rated value, keep the cutting machine 30 running continuously;

[0111] Start the first three-axis linear module 20, drive the cutting machine 30 to feed downwards at a uniform speed in the vertical direction, so that the blade 302 of the cutting machine 30 gradually cuts into the rock core 50 to advance the cutting operation;

[0112] During the cutting process, the blade 302 contacts the hard particles in the core 50. The instantaneous impact force pushes the cutting machine 30 upward to compress the pre-compression suspension mechanism 40, causing the cutting machine 30 to move a predetermined distance in the vertical upward direction. The pre-compression suspension mechanism 40 directly absorbs the impact load to prevent the impact from being transmitted to the first three-axis linear module 20. When the impact load disappears, the rebound force of the pre-compression suspension mechanism 40 pushes the cutting machine 30 to reset vertically downward, so that the blade 302 always maintains stable contact with the surface of the core 50.

[0113] After the cutting machine 30 feeds along the axis of the core 50 to the end to complete the cutting of the entire core 50, the cutting machine 30 is turned off and the blade 302 stops rotating completely. The first three-axis linear module 20 drives the cutting machine 30 to rise vertically to a safe height above the top of the core 50, and then drives the cutting machine 30 to return to the initial position in the horizontal direction.

[0114] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A core cutting and sampling device for field use, characterized in that, include: A cutting table with a work surface and a workspace above the work surface; A first three-axis linear module is disposed on the cutting table. The first three-axis linear module has a movable connecting end, which is located above the table surface of the cutting table, and the moving path of the movable connecting end is a three-dimensional spatial moving path. A cutting machine is connected to the movable connection end of the first three-axis linear module. The movable connection end of the first three-axis linear module drives the cutting machine to move within the workspace above the table according to a three-dimensional spatial movement path. The movable connection end includes a mounting platform and a counterweight platform, and the cutting machine is mounted on the mounting platform. Two pre-compression suspension mechanisms are symmetrically arranged on the main shaft on both sides of the blade of the cutting machine. They are configured to allow the cutting machine to move a predetermined distance in the vertically upward direction during core cutting and sampling, and to apply a predetermined downward pressure to the cutting machine in the vertically downward direction. The pre-pressure suspension mechanism is located on the spindle of the cutting machine near the blade. The pre-pressure suspension mechanism includes: A high-speed bearing is connected to the main shaft of the cutting machine; A guide rail is provided on the outside of the high-speed bearing. The two opposite ends of the outer ring of the high-speed bearing are respectively embedded in the two inner grooves of the guide rail. The high-speed bearing is slidably connected to the guide rail. The disc spring mechanism has one end connected to the outer ring of the high-speed bearing and the other end connected to the fixed frame. The mounting platform and the counterweight platform are respectively connected to the guide rail of one of the pre-compression suspension mechanisms.

2. The field core cutting and sampling device according to claim 1, characterized in that, The first three-axis linear module includes a cross-shaped linear module and a vertical linear module. The cross-shaped linear module is disposed on the cutting table, and the vertical linear module is connected to the cross-shaped linear module. A mounting platform is connected to the vertical linear module, and the mounting platform can move vertically through the vertical linear module.

3. The field core cutting and sampling device according to claim 2, characterized in that, The vertical linear module includes two vertical rails and two vertical slides. The two vertical rails are spaced apart along the length of the cutting table, and the vertical slides are slidably connected to the vertical rails. The mobile connection end also includes a counterweight platform with the same structure as the mounting platform. The mounting platform and the counterweight platform are respectively connected to a vertical slide, and the counterweight platform is provided with counterweights.

4. The field core cutting and sampling device according to claim 3, characterized in that, The main shaft of the cutting machine extends to one end of the counterweight and is rotatably connected to the counterweight. The cutting machine blade is located in the gap between the mounting platform and the counterweight platform.

5. The field core cutting and sampling device according to claim 1, characterized in that, The disc spring mechanism includes a limiting seat, a fixed sleeve, a flat cover ring, a movable shaft, multiple sets of disc springs, an adjusting nut, and a connecting seat. The bottom of the limiting seat has a groove, which is fixedly connected to the outer ring of the high-speed bearing. One end of the fixed sleeve is connected to the top of the limiting seat, and the other end is connected to the flat cover ring. The movable shaft is movably inserted into the fixed sleeve. Multiple sets of disc springs are sleeved on the movable shaft. The outer wall of the top end of the movable shaft is threaded. The adjusting nut is threaded onto the movable shaft. The disc springs are located between the adjusting nut and the flat cover ring, and the position of the adjusting nut allows the disc springs to have preload force. The movable shaft is connected to the connecting seat, and the connecting seat is connected to the fixed frame and fixes the connecting seat.

6. The field core cutting and sampling device according to claim 1, characterized in that, It also includes a groove opening mechanism, which is set on the cutting table and is used to pre-open stress grooves at the location where the cutting machine cuts the rock core to release the stress of the rock core.

7. The field core cutting and sampling device according to claim 6, characterized in that, The slotting mechanism includes a driver and a V-shaped grinding head, the V-shaped grinding head being connected to the rotation shaft of the driver, and the driver being disposed at the bottom of the cutting table.

8. The field core cutting and sampling device according to claim 1, characterized in that, It also includes a packaging mechanism configured to package the core samples cut by the cutting machine.

9. The field core cutting and sampling device according to claim 8, characterized in that, The packaging mechanism includes: The second and third-axis linear module is mounted on the cutting table; The control panel is connected to the second and third axis linear modules; Four side rods are provided, with two side rods spaced apart on one side of the operating table and the other two side rods provided on the other side of the operating table. The side rods are provided along the length of the core sample. A cross slide is arranged parallel to the bottom surface of the side rod, and the cross slide is connected to the bottom of the side rod; A vertical drive mechanism is mounted on the cross slide. The vertical rod is driven and connected to the vertical drive mechanism, which is used to drive the vertical rod to move vertically. The end of the vertical rod near the rock core is bent inward, and the four vertical rods are located on both sides of the rock core.

10. A method for core sampling in the field, characterized in that, Core cutting and sampling are performed in the field using the field core cutting and sampling device according to any one of claims 1 to 9.

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