Manufacturing method of rock coring device with high stability

By adopting pneumatic moving and lever spring stable design in rock core retrieval equipment, combined with laser displacement sensors and intelligent control systems, the problems of insufficient core retrieval accuracy, insufficient stability and low efficiency are solved, and a more efficient and stable core retrieval process is achieved.

CN120193770AInactive Publication Date: 2025-06-24LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Patent Information

Application Number
CN202510638752.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-19
Publication Date
2025-06-24
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing rock core extraction equipment has problems such as insufficient core extraction accuracy, insufficient core stability and low core extraction efficiency during drilling, mainly due to experience relying on manual adjustment, lack of precision guide mechanisms and insufficient intelligence of the gear rack and rack transmission system.

Method used

The device is driven to move with pneumatic means, combined with the design of lever and spring to achieve stable core extraction. The device includes multiple sets of shaft holes, guide rails, adjustment plates, laser displacement sensors, motors, racks, drive wheels and friction belts. Through modular design, intelligent control and multi-function integration, it realizes automatic core adjustment and precise position adjustment.

Benefits of technology

It improves the stability and efficiency of core extraction, reduces mechanical vibration and ground reaction force disturbance, and enhances the degree of automation of the equipment and the real-time data processing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of oil exploration equipment, and particularly discloses a manufacturing method and device of rock coring equipment with high stability. The technical defects that in the prior art, coring operation excessively depends on manual adjustment, so that efficiency is low, mechanical vibration of traditional equipment influences coring precision, and manual operation is difficult to guarantee perpendicularity are overcome. Based on the Pascal principle of fluid statics, a hydraulic closed-loop control system is adopted for achieving accurate adjustment of the coring depth, the problems that positioning is not accurate, vibration exceeds the standard and the like caused by traditional manual operation are effectively solved, and the problem that the coring position offset accuracy is insufficient can be effectively solved; based on the dynamic balance principle of the classical mechanics principle and the interference fit theory of contact mechanics, an electric push rod-cam structure is adopted, self-adaptive adjustment of the angle of a supporting shaft is achieved, and the dynamic friction coefficient between the lifting device and the ground is achieved through a roller friction belt structure. The problem that the corer is insufficient in stability in the coring process can be effectively solved; according to the dynamic adjusting system based on the intelligent control theory of artificial intelligence, micron-order angle deviation detection is achieved through a laser displacement sensor, dynamic compensation adjustment of a supporting shaft and a second electric push rod is achieved, and the problems of visual interpretation deviation existing in traditional manual adjustment and dynamic response lag under the complex geological condition are solved.
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Description

Technical Field

[0001] The present invention relates to the technical field of accessory devices for coring equipment, and particularly to a manufacturing method of a rock coring device with relatively high stability. Background Art

[0002] During the oil extraction process, by understanding the underground geological structure, evaluating the oil and gas resource reserves, and guiding the drilling operation, in a new exploration area, by taking core samples to understand the types, thicknesses, and distributions of underground rock formations, and evaluating whether the area has the potential for oil and gas resources, it is of great significance to the exploration link of oil extraction. Among them, during the drilling process, by taking core samples to evaluate the geological conditions on the drilling path, optimizing the drilling plan, and reducing the drilling risk. The most common existing oil sampling equipment is a core drill; a core drill is a device used for coring oil during industrial production, and it has been widely used in the field of oil exploration; Traditional coring equipment generally adopts a mechanical link-pulley group manual adjustment system. During operation, 4-6 operators are required to cooperate to complete the equipment positioning and angle calibration, and there are three major technical bottlenecks: First, manual adjustment relies on empirical judgment, resulting in a deviation in the inclination angle of the support shaft. When the deviation angle exceeds +2°, it may cause the drill pipe to deviate, so that the coring position changes, resulting in insufficient coring accuracy; Second, the gear-rack transmission system lacks a precise guiding mechanism, and there is an error in the displacement of the drilling module. It is prone to lateral vibration in hard rock formations, and the core is easily subjected to repeated impacts and frictions during drilling, so that the core is damaged, resulting in insufficient coring stability; Third, in terms of efficiency, due to the lack of intelligence in existing core collection equipment, it mostly relies on manual post-analysis. Manual analysis may have problems such as insufficient data analysis and inability to make real-time decisions based on real-time situation analysis, so that data processing lags and the dynamic adjustment ability is lacking, resulting in insufficient coring efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a manufacturing method of a rock coring device with relatively high stability. This coring device for core mining drives the device to move pneumatically, and uses a lever and a spring to stabilize the coring device. It has the characteristics of simple structure, strong stability, low noise, easy to carry, synchronous control, etc., and can play a stable role during the mining process.

[0004] A manufacturing method of a rock coring device with high stability. The present invention includes a mounting frame, screw holes, through holes, shaft holes, a first electric push rod, a cross beam, a support shaft, rollers, a cam, a penetration hole, a first mounting seat, a second mounting seat, a laser displacement sensor, a guide rail, an adjusting plate, a grip, an electric box, a chute, bolts, a clamping plate, a rack, a driving wheel, a motor, a connecting seat, a second electric push rod, a wedge, a connecting block, a base, a lifting rod, a hydraulic cylinder, a coring body, a card slot, a support block, and a friction belt. The support shaft and the cam are rotationally connected through the penetration hole in a shaft-hole sleeved manner, and four groups of rollers are symmetrically and fixedly connected to the ends of the support shaft; the guide rail and the adjusting plate form a two-way sliding pair through the chute, and two groups of clamping plates pass through the screw holes by bolts to achieve the meshing and locking of the driving wheel and the rack; the wedge penetrates through the through hole of the adjusting plate to form a sliding guiding mechanism, and the lifting rod is nested in the card slot of the base; the friction belt is coated on the surface of the roller in an interference fit manner. According to the manufacturing method of the oil coring device with high automation degree described in claim 1, it is characterized in that: there are two groups of the support shaft and the cam, which are symmetrically passed through the shaft holes of the mounting frame for rotational connection; there are four groups of the rollers, which are equidistantly installed at the ends of the two groups of support shafts; there are two groups of the guide rails, which are symmetrically installed on both sides of the top of the mounting frame; there are two groups of the clamping plate and the driving wheel, which are symmetrically threadedly connected to the screw holes of the adjusting plate through bolts; there are two groups of the wedge and the second electric push rod, which are slidably connected through the through holes of the adjusting plate; and there are four groups of the friction belts, which are evenly coated on the surface of the rollers.

[0005] This design includes the following steps: Multiple groups of shaft holes are provided on the mounting bracket. The displacement device passes through the corresponding shaft holes and is rotatably connected to the mounting bracket. The connecting end of the sliding component is connected to the top end of the mounting bracket. A screw hole is provided on the sliding component. The driving device passes through the screw hole and is threadedly connected to the sliding component. A through hole is provided on the sliding component. The auxiliary device passes through the through hole and is slidably connected to the sliding component. The bottom end of the lifting mechanism is connected to the top end of the sliding component. The first electric push rod, cross beam, support shaft, roller and cam. Two groups of support shafts respectively pass through the corresponding shaft holes and are rotatably connected to the mounting bracket. Through holes are provided on both groups of cams. Two groups of support shafts respectively pass through the corresponding through holes and are fixedly sleeved with the corresponding cams. First mounting seats are provided on both groups of cams. Two connecting ends of the cross beam respectively pass through the corresponding first mounting seats and are rotatably connected to the two groups of cams. Second mounting seats are provided on both the cross beam and the mounting bracket. The connecting end and the output end of the first electric push rod respectively pass through the corresponding second mounting seats and are rotatably connected to the cross beam and the mounting bracket. Four groups of rollers are respectively rotatably connected to the connecting ends of the corresponding support shafts. Guide rail, adjusting plate, handle and electric box. The connecting end of the handle is connected to the top end of the mounting bracket. The connecting end of the electric box is connected to the connecting end of the handle. The connecting ends of two groups of guide rails are both connected to the top end of the mounting bracket. A chute is provided on the adjusting plate. Two groups of guide rails respectively pass through the corresponding sliders and are slidably connected to the adjusting plate. Bolt, clamping plate, rack, driving wheel and motor. The connecting ends of two groups of clamping plates are both connected to the connecting end of the adjusting plate. Two groups of bolts respectively pass through the corresponding screw holes and are threadedly connected to the corresponding clamping plates and the adjusting plate. Connecting seats are provided on two groups of clamping plates. The driving wheel passes through the connecting seat and is rotatably connected to the two groups of clamping plates. The connecting end of the motor is connected to the connecting end of the corresponding clamping plate. The output end of the motor passes through the connecting seat and is connected to the connecting end of the driving wheel. The connecting end of the rack is connected to the top end of the mounting bracket. The output end of the driving wheel is meshed with the output end of the rack. Second electric push rod, wedge and connecting block. Two groups of wedges respectively pass through the corresponding through holes and are slidably connected to the adjusting plate. The connecting ends of two groups of second electric push rods are both connected to the top end of the adjusting plate. The bottom ends of two groups of connecting blocks are respectively connected to the output end of the corresponding second electric push rod and the top end of the wedge. Base, lifting rod, hydraulic cylinder and core sampling body. The connecting end of the base is connected to the top end of the adjusting plate. A clamping groove is provided on the base. The lifting rod passes through the clamping groove and is slidably connected to the base. The connecting end and the output end of the hydraulic cylinder are respectively connected to the connecting end of the base and the lifting rod. The connecting end of the core sampling body is connected to the top end of the lifting rod. Support blocks. The connecting ends of four groups of support blocks are evenly installed at the bottom end of the mounting bracket. Friction belts. Four groups of friction belts are evenly installed on the corresponding rollers.

[0006] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: Modular design and quick installation. Each functional module (such as clamping plate, adjusting plate, driving wheel) is connected by bolts, supporting quick disassembly, assembly and maintenance, reducing the difficulty of overhaul and time cost.

[0007] The multiple stability guarantee mechanism effectively suppresses mechanical vibration and ground reaction force disturbance during core sampling operations and enhances equipment stability through the composite design of support blocks and interference fit friction belts, combined with a wedge-shaped dynamic support mechanism driven by a second electric push rod.

[0008] Intelligent control and multi-functional integration. The electric box integrating the IoT automatic control system cooperates with a laser displacement sensor to achieve micron-level angle deviation detection, and real-time monitoring of equipment attitude and load parameters, and automatically adjusts the coordinated drive output power of the rack and pinion transmission system and the electric push rod to improve core sampling efficiency.

[0009] Automated core sampling adjustment. The driving device drives the rack and pinion to mesh and transmit power through a motor, driving the sliding component to accurately extend and retract, realizing the automated adjustment of the core sampling position. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the overall structure of the manufacturing method of a rock core sampling device with high stability according to the present invention.

[0011] Figure 2 It is a schematic diagram of the connection structure of the mounting plate and the support shaft according to the present invention.

[0012] Figure 3 It is a schematic diagram of the connection structure of the support shaft and the roller according to the present invention.

[0013] Figure 4 It is a partial enlarged schematic diagram of A according to the present invention. In the figure: 1. mounting frame; 201. screw hole; 202. through hole; 203. shaft hole; 301. first electric push rod; 302. cross beam; 303. support shaft; 304. roller; 305. cam; 306. penetration hole; 307. first mounting seat; 308. second mounting seat; 309. laser displacement sensor; 401. guide rail; 402. adjustment plate; 403. grip; 404. electric box; 405. chute; 501. bolt; 502. clamping plate; 503. rack; 504. driving wheel; 505. motor; 506. connecting seat; 601. second electric push rod; 602. wedge; 603. connecting block; 701. base; 702. lifting rod; 703. hydraulic cylinder; 704. core sampling body; 705. card slot; 801. support block; 9. friction belt; Detailed Embodiments

[0014] The following further describes the present invention with reference to the drawings. It should be understood that the following described embodiments are merely exemplary and not restrictive: The present invention includes 1. mounting bracket; 201. screw hole; 202. through hole; 203. shaft hole; 301. first electric push rod; 302. cross beam; 303. support shaft; 304. roller; 305. cam; 306. penetration hole; 307. first mounting seat; 308. second mounting seat; 309. laser displacement sensor; 401. guide rail; 402. adjusting plate; 403. grip; 404. electric box; 405. chute; 501. bolt; 502. clamping plate; 503. rack; 504. driving wheel; 505. motor; 506. connecting seat; 601. second electric push rod; 602. wedge; 603. connecting block; 701. base; 702. lifting rod; 703. hydraulic cylinder; 704. core drilling body; 705. clamping groove; 801. support block; 9. friction belt; Such as Figure 1As shown in the figure, multiple sets of shaft holes 203 are provided on the mounting bracket 1. The displacement device passes through the corresponding shaft holes 203 and is rotatably connected to the mounting bracket 1. The connecting end of the sliding component is connected to the top end of the mounting bracket 1. A screw hole 201 is provided on the sliding component. The driving device passes through the screw hole 201 and is threadedly connected to the sliding component. A through hole 202 is provided on the sliding component. The auxiliary device passes through the through hole 202 and is slidably connected to the sliding component. The bottom end of the lifting mechanism is connected to the top end of the sliding component. The first electric push rod 301, cross beam 302, support shafts 303, rollers 304 and cams 305. Two groups of support shafts 303 respectively pass through the corresponding shaft holes 203 and are rotatably connected to the mounting bracket 1. Through holes 306 are provided on both groups of cams 305. Two groups of support shafts 303 respectively pass through the corresponding through holes 306 and are fixedly sleeved with the corresponding cams 305. First mounting seats 307 are provided on both groups of cams 305. Two connecting ends of the cross beam 302 respectively pass through the corresponding first mounting seats 307 and are rotatably connected to the two groups of cams 305. Second mounting seats 308 are provided on both the cross beam 302 and the mounting bracket 1. The connecting end and the output end of the first electric push rod 301 respectively pass through the corresponding second mounting seats 308 and are rotatably connected to the cross beam 302 and the mounting bracket 1. Four groups of rollers 304 are respectively rotatably connected to the connecting ends of the corresponding support shafts 303. The laser displacement sensor 309 is embedded at the bottom of the mounting bracket 1. The guide rails 401, adjusting plate 402, handle 403 and electric box 404. The connecting end of the handle 403 is connected to the top end of the mounting bracket 1. The connecting end of the electric box 404 is connected to the connecting end of the handle 403. The connecting ends of the two groups of guide rails 401 are both connected to the top end of the mounting bracket 1. A chute 405 is provided on the adjusting plate 402. The two groups of guide rails 401 respectively pass through the corresponding sliders and are slidably connected to the adjusting plate 402. Bolts 501, clamping plates 502, racks 503, drive wheels 504 and motors 505. The connecting ends of the two groups of clamping plates 502 are both connected to the connecting end of the adjusting plate 402. The two groups of bolts 501 respectively pass through the corresponding screw holes 201 and are threadedly connected to the corresponding clamping plates 502 and the adjusting plate 402. Connecting seats 506 are provided on the two groups of clamping plates 502. The drive wheel 504 passes through the connecting seat 506 and is rotatably connected to the two groups of clamping plates 502. The connecting end of the motor 505 is connected to the connecting end of the corresponding clamping plate 502. The output end of the motor 505 passes through the connecting seat 506 and is connected to the connecting end of the drive wheel 504. The connecting end of the rack 503 is connected to the top end of the mounting bracket 1. The output end of the drive wheel 504 is meshed with the output end of the rack 503. The second electric push rod 601, wedges 602 and connecting blocks 603. The two groups of wedges 602 respectively pass through the corresponding through holes 202 and are slidably connected to the adjusting plate 402. The connecting ends of the two groups of second electric push rods 601 are both connected to the top end of the adjusting plate 402. The bottom ends of the two groups of connecting blocks 603 are respectively connected to the output end of the corresponding second electric push rod 601 and the top end of the wedge 602.Base 701, lifting rod 702, hydraulic cylinder 703 and coring body 704, the connecting end of base 701 is connected to the top of adjusting plate 402, base 701 is provided with a card slot 705, lifting rod 702 passes through the card slot 705 and is slidably connected to base 701, the connecting end and output end of hydraulic cylinder 703 are respectively connected to the connecting end of base 701 and lifting rod 702, and the connecting end of coring body 704 is connected to the top of lifting rod 702. Support block 801, the connecting ends of four groups of support blocks 801 are evenly installed at the bottom of mounting frame 1, friction belt 9, four groups of friction belt 9 are evenly installed on corresponding rollers 304.

[0015] When the present invention is working, the mounting frame 1 starts the displacement device 2 to rotate, so that the relative angle between the mounting plate 3 and the mounting plate 3 changes, and drives the mounting plate 3 to descend after flipping, so that it supports the ground. In this process, the driving device 4 is started to drive the sliding assembly 5 to slide, so that it extends on the equipment, so that it is convenient for coring. In this process, the auxiliary device 6 is started to provide auxiliary support for the extended part to ensure the stability of the equipment, and the lifting mechanism 7 is started to drive the equipment to descend and drive, and the first electric push rod 301 is started to tilt and retract. In the process of retraction and extension, the crossbeam 302 connected thereto is driven to swing up and down. When the crossbeam 302 swings, the cam 305 hinged thereto is driven to swing, and the support shaft 303 fixedly mounted on the cam 305 rotates on the mounting frame 1 accordingly. The bending design of the support shaft 303 drives the position of the roller 304 to be adjusted, and the mounting frame 1 is lowered. The laser displacement sensor 309 emits a laser beam to the surface of the object to be measured, and drives the adjustment plate 402 to slide on the guide rail 401 through the driving device 4. In this way, the device can be unfolded. During this process, the device can be displaced by the handle 403, and the device can be powered and IoT-controlled by the electric box 404. The card plate 502 and the adjustment plate 402 are connected by bolts 501. When disassembling, the device is modularly disassembled by rotating the bolts 501. During this process, the motor 505 is started to rotate on the card plate 502, driving the driving wheel 504 to rotate. The meshing relationship between the driving wheel 504 and the rack 503 drives the adjustment plate 402 to rotate along The rack 503 slides along the path of the adjusting plate 402. During the sliding of the adjusting plate 402, the second electric push rod 601 is started to lift and lower, so that the wedge 602 connected to the connecting block 603 slides in the through hole 202 accordingly. The wedge 602 is supported by the ground, and the hydraulic cylinder 703 is started to drive the lifting rod 702 to slide in the base 701, so as to adjust the ground clearance of the coring machine body 704. When displacing, it rises to make it farther from the ground, which is convenient for displacement. When coring, it descends to provide position compensation for the coring machine body 704.

[0016] The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0017] In the present invention, the terms "first", "second", "third" do not represent specific quantities and orders, but are only used for name distinction.

[0018] Based on this invention, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by researchers in the art without making innovations based on the embodiments in the present invention fall within the scope of protection of the present invention.

Claims

1. A method for manufacturing a rock coring device with high stability, the invention comprises: Mounting frame (1), screw hole (201), through hole (202), shaft hole (203), first electric push rod (301), cross beam (302), support shaft (303), roller (304), cam (305), through hole (306), first mounting seat (307), second mounting seat (308), laser displacement sensor (309), guide rail (401), adjustment plate (402), handle (403), electrical box (404), slide groove (405), bolt (501), card plate (502), rack (503), driving wheel (504), motor (505), connecting seat (506), second electric push rod (601), wedge (602), connecting block (603), base (701), lifting rod (702), hydraulic cylinder (703), coring machine body (704), card The invention relates to a method for manufacturing a plurality of rollers (304) for rotating axles (303) and a plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305) by a through hole (306). The plurality of rollers (304) are connected to the plurality of cams (305) by a through hole (306). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305). The plurality of rollers (304) are connected to the plurality of cams (305).

2. The method for manufacturing a petroleum coring device with a high degree of automation according to claim 1, characterized in that: There are two groups of the support shaft (303) and cam (305), which are symmetrically passed through the shaft hole (203) of the mounting frame (1) for rotational connection; there are four groups of the rollers (304), which are equidistantly installed at the ends of the two groups of support shafts (303); there are two groups of the guide rails (401), which are symmetrically installed on both sides of the top of the mounting frame (1); there are two groups of the clamping plate (502) and the driving wheel (504), which are symmetrically threadedly connected to the screw hole (201) of the adjustment plate (402) through the bolt (501); there are two groups of the wedge (602) and the second electric push rod (601), which are slidably connected through the through hole (202) of the adjustment plate (402); there are four groups of the friction belts (9), which are evenly coated on the surface of the rollers (304).

3. A method for manufacturing a rock coring device with high stability as claimed in claims 1-2, characterized in that: The method comprises the following steps: The mounting frame (1) is provided with a plurality of sets of shaft holes (203); the displacement device passes through the corresponding shaft holes (203) and is rotatably connected to the mounting frame (1); the connecting end of the sliding assembly is connected to the top of the mounting frame (1); the sliding assembly is provided with a screw hole (201); the driving device passes through the screw hole (201) and is threadedly connected to the sliding assembly; the sliding assembly is provided with a through hole (202); the auxiliary device passes through the through hole (202) and is slidably connected to the sliding assembly; and the bottom end of the lifting mechanism is connected to the top of the sliding assembly. A first electric push rod (301), a crossbeam (302), a support shaft (303), a roller (304) and a cam (305); two groups of support shafts (303) respectively pass through corresponding shaft holes (203) and are rotatably connected to the mounting frame (1); two groups of cams (305) are provided with through holes (306); two groups of support shafts (303) respectively pass through corresponding through holes (306) and are fixedly mounted with corresponding cams (305); two groups of cams (305) are provided with first mounting seats (307); The two groups of connection ends respectively pass through the corresponding first mounting seats (307) and are rotatably connected to the two groups of cams (305); the crossbeam (302) and the mounting frame (1) are both provided with second mounting seats (308); the connection end and the output end of the first electric push rod (301) respectively pass through the corresponding second mounting seats (308) and are rotatably connected to the crossbeam (302) and the mounting frame (1); the four groups of rollers (304) are respectively rotatably connected to the connection ends of the corresponding support shafts (303); and the laser displacement sensor (309) is embedded in the bottom of the mounting frame (1). A guide rail (401), an adjustment plate (402), a handle (403) and an electrical box (404); a connection end of the handle (403) is connected to the top of the mounting frame (1); a connection end of the electrical box (404) is connected to the connection end of the handle (403); the connection ends of the two sets of guide rails (401) are connected to the top of the mounting frame (1); a slide groove (405) is provided on the adjustment plate (402); and the two sets of guide rails (401) are respectively passed through corresponding sliders and are slidably connected to the adjustment plate (402). Bolts (501), a card plate (502), a rack (503), a driving wheel (504) and a motor (505); the connecting ends of the two groups of card plates (502) are connected to the connecting ends of the adjustment plate (402); the two groups of bolts (501) pass through corresponding screw holes (201) and are threadedly connected to the corresponding card plates (502) and the adjustment plate (402); the two groups of card plates (502) are provided with connecting seats (506); the driving wheel (504) passes through the connecting seat (506) and is rotatably connected to the two groups of card plates (502); the connecting end of the motor (505) is connected to the connecting end of the corresponding card plate (502); the output end of the motor (505) passes through the connecting seat (506) and is connected to the connecting end of the driving wheel (504); the connecting end of the rack (503) is connected to the top end of the mounting frame (1); and the output end of the driving wheel (504) is meshed with the output end of the rack (503).The second electric push rod (601), the wedge (602) and the connecting block (603), the two sets of wedges (602) respectively pass through the corresponding through holes (202) and are slidably connected to the adjustment plate (402), the connecting ends of the two sets of second electric push rods (601) are connected to the top of the adjustment plate (402), and the bottom ends of the two sets of connecting blocks (603) are respectively connected to the output ends of the corresponding second electric push rods (601) and the top of the wedge (602). The base (701), the lifting rod (702), the hydraulic cylinder (703) and the coring body (704), the connecting end of the base (701) is connected to the top of the adjustment plate (402), the base (701) is provided with a slot (705), the lifting rod (702) passes through the slot (705) and is slidably connected to the base (701), the connecting end and the output end of the hydraulic cylinder (703) are respectively connected to the connecting end of the base (701) and the lifting rod (702), and the connecting end of the coring body (704) is connected to the top of the lifting rod (702). The supporting blocks (801), the connecting ends of the four groups of supporting blocks (801) are evenly mounted on the bottom of the mounting frame (1), and the friction belts (9), the four groups of friction belts (9) are evenly mounted on the corresponding rollers (304).