Sample jacking device and sample jacking method for rock core pipe

Abstract

The invention discloses a sample jacking device and a sample jacking method for a rock core tube. The sample jacking device comprises an operation platform, the rock core tube, a hydraulic cylinder, a sample pushing rod, a sample pushing plate and a sample receiving device, the sample jacking method comprises the following steps: placing the rock core pipe in the supporting pipe, and coaxially fixing the rock core pipe and the supporting pipe through the adjusting screw and the arc-shaped fixing sheet; the piston end of the hydraulic cylinder is clamped with the end part of the sample pushing rod, and meanwhile, the sample pushing plate is propped against the rock core in the rock core pipe; the piston end of the hydraulic cylinder is controlled to extend, the sample pushing plate is pushed through the sample pushing rod, and the rock core in the rock core pipe is ejected to the cleaning pipe; the rock core in the cleaning pipe is cleaned through a spray head; clamping a second pulley at the bottom of a fixed block corresponding to one sample receiving pipe between two elastic limiting caps, jacking a clean rock core into the corresponding sample receiving pipe, and marking the clean rock core as a No.1 sample; the sample receiving device is pushed, the sample receiving pipe is replaced, the rock core continues to be ejected out, cleaning and sample receiving are conducted, and corresponding samples are sequentially marked according to sequence numbers.

Description

Technical field:

[0001] The invention relates to the technical field of core sampling, and in particular to a sampling device and a sampling method for a core tube. Background technology:

[0002] Drilling is the most widely used exploration method in geological survey. Its purpose is to obtain rock cores, mineral samples, soil samples, etc. from different depths for analysis and research, in order to determine the physical and mechanical properties of rocks and soil layers. It is an important means to understand geological structure or geological structure, and can provide the needs for exploration and excavation.

[0003] At present, in geological exploration, operators first use double-tube rope coring, that is, the core enters the core tube through the drill bit. After the core tube is full of core, the core tube full of core is lifted out of the bottom of the hole by a salvage device carrying a wire rope; then, the operators use hammers to shake the core out of the core tube.

[0004] The above coring process has the following problems: 1. During the coring process, the vibration of the core can easily lead to confusion in the order of samples and destruction of the geological structure; 2. During the drilling process, faults and broken strata are encountered, and the shape of the core in the core tube is irregular. After the hammer vibration, the core cracks and breaks, accumulates and compacts, which can easily block the core tube and reduce the coring efficiency. Summary of the invention:

[0005] The first purpose of the present invention is to provide a top sampling device for a core tube, which solves the problem that the traditional hammer coring method easily causes the core to crack and break, accumulate and compact, block the core tube, and has low coring efficiency.

[0006] The second purpose of the present invention is to provide a top sampling method, which solves the problem that the traditional hammer coring method easily leads to confusion in the order of samples and destruction of geological structures.

[0007] The first purpose of the present invention is implemented by the following technical scheme: a sample pushing device for a core tube, which comprises an operating platform, a core tube, a hydraulic cylinder, a sample pushing rod and a sample pushing plate; the core tube is fixed on the operating platform by a connecting mechanism, and the hydraulic cylinder with a telescopic end facing the core tube is provided on the operating platform at one end of the core tube, the end face of the piston end of the hydraulic cylinder is vertically connected to the sample pushing rod, the other end of the sample pushing rod is vertically fixedly connected to the plate surface of the sample pushing plate, and the sample pushing plate is movably placed in the core tube.

[0008] Preferably, a sample receiving device is provided on the operating platform at the other end of the core tube, and the sample receiving device includes a plurality of sample receiving tubes which are arranged side by side and connected in sequence along a direction perpendicular to the length of the core tube, and the lowest position of the sample receiving tube is at the same height as the lowest position of the core tube.

[0009] Preferably, a funnel penetrating the operating platform is fixed between the sample receiving device and the core tube, a cleaning tube arranged in the same straight line as the core tube is fixed on the top of the funnel, the cleaning tube is a semicircular tube body with open ends, the lowest position of the cleaning tube is at the same height as the lowest position of the core tube, and a plurality of water leakage holes opposite to the funnel are opened at the bottom of the cleaning tube;

[0010] A water supply tank and a waste water tank are provided below the operating platform. A water pump is fixed in the water supply tank. The outlet of the water pump is connected to the water inlet end of the water supply pipe. The water outlet end of the water supply pipe is fixedly connected to a nozzle placed above the cleaning pipe. A filter is vertically provided in the waste water tank. The bottom of the funnel is placed on one side of the filter in the waste water tank. The side wall of the waste water tank on the other side of the filter is connected to the water supply tank through a communicating vessel.

[0011] Preferably, the connecting mechanism includes a support tube, an adjusting screw and an arc-shaped fixing plate; the support tube is a semicircular tube body with open ends, the adjusting screws are respectively threaded through the tube walls on both sides of the support tube, the arc-shaped fixing plates are respectively fixed to the ends of the adjusting screws in the support tube, and the core tube is coaxially fixed in the support tube by the arc-shaped fixing plates.

[0012] Preferably, a first track perpendicular to the length direction of the core tube is provided on the operating platform below the hydraulic cylinder, and a first pulley sliding along the first track is installed at the bottom of the hydraulic cylinder.

[0013] Preferably, a groove is provided on the operating platform below the sample receiving device in a direction perpendicular to the length of the core tube, and a second track is provided at the bottom of the groove along the length direction; a fixed block is connected to the bottom of each sample receiving tube, and a second pulley is provided at the bottom of each fixed block to slide along the second track.

[0014] Preferably, a third track is provided on the side wall of the groove along the length direction, and a third pulley sliding along the third track is provided on the side wall of each of the fixing blocks.

[0015] Preferably, circular holes positioned opposite to each other are respectively opened downward on the second track at the front and rear sides of the second pulley along the moving direction of the second pulley, a limit spring is installed in each of the circular holes, and an elastic limit cap is fixed to the top of the limit spring.

[0016] The second object of the present invention is implemented by the following technical solution: a top sampling method, which comprises the following steps:

[0017] (1) placing the core tube in the support tube of the connecting mechanism, and fixing the core tube and the support tube coaxially by adjusting screws and arc-shaped fixing plates;

[0018] (2) The piston end of the hydraulic cylinder is clamped with the end of the sample push rod, and at the same time, the sample push plate is abutted against the core in the core tube;

[0019] (3) Control the extension of the piston end of the hydraulic cylinder, push the sample push plate through the sample push rod, and push the core in the core tube out into the cleaning tube;

[0020] (4) Start the water pump, and water is sprayed out from the water supply tank through the nozzle on the water supply pipe to clean the core in the cleaning pipe and remove the mud on the surface of the core;

[0021] (5) Clamp the second pulley at the bottom of the fixed block corresponding to one of the sample receiving tubes between the two elastic limiting caps, and then push the clean core into the corresponding sample receiving tube and mark it as sample No. 1;

[0022] (6) Push the sample receiving device to replace the next sample receiving tube; then, repeat steps (3) and (4) to push the remaining clean core into the corresponding sample receiving tube and mark the corresponding samples in sequence.

[0023] Preferably, when the sample pushing rod needs to be extended, the end of the sample pushing rod is removed from the piston end of the hydraulic cylinder, the piston end of the hydraulic cylinder is controlled to retract, and the hydraulic cylinder is pushed to slide along the first track to move it away from the sample pushing rod; after the sample pushing rod to be assembled is assembled and connected with the original sample pushing rod, the hydraulic cylinder is pushed again to slide along the first track back to the initial position, and the end of the newly assembled sample pushing rod is connected to the piston end of the hydraulic cylinder.

[0024] The advantages of the present invention are as follows: first, the present invention is provided with an operating platform, a connecting mechanism, a core tube, a hydraulic cylinder, a sample pushing rod, a sample pushing plate and a sample receiving device; the core tube is placed in a supporting tube of the connecting mechanism, the core tube and the supporting tube are coaxially fixed, the piston end of the hydraulic cylinder is clamped with the end of the sample pushing rod, and at the same time, the sample pushing plate is abutted against the core in the core tube; the piston end of the hydraulic cylinder is controlled to extend, and the sample pushing plate is pushed into the core tube by the sample pushing rod, and the core in the core tube is pushed out into the sample receiving device, so that the core in the core tube is not shaken out by hammering, and the order of samples is not confused, the geological structure is not destroyed, and the irregularly shaped core is not cracked and broken due to hammering vibration, and the core tube is not piled up, compacted and blocked, so the core in the core tube can be quickly taken out, and the coring efficiency is improved.

[0025] Second, the sample receiving device of the present invention includes several sample receiving tubes, which push clean rock cores into corresponding sample receiving tubes in turn, and mark the samples in the sample receiving tubes in sequence according to the serial numbers. The staff can take out the samples strictly according to the sample serial numbers and stratigraphic order, ensuring the integrity of the sample structure, while saving manpower and greatly reducing the labor burden of the workers.

[0026] Third, the present invention is provided with a cleaning pipe, a funnel, a waste water tank, a water supply tank, a water pump, a water supply pipe and a nozzle. When the water pump is started, water is sprayed out from the water supply tank through the nozzle on the water supply pipe to clean the rock core in the cleaning pipe, thereby removing mud on the surface of the rock core and ensuring that the rock core is clean and tidy. Description of the drawings:

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of Example 1.

[0029] Figure 2 yes Figure 1 Top view of the .

[0030] Figure 3 yes Figure 1 AA section view.

[0031] Figure 4 yes Figure 2 BB cross-sectional view.

[0032] Figure 5 It is the installation diagram of the cleaning tube and funnel.

[0033] Figure 6 This is a schematic diagram of the installation of the sample push rod, sample push plate, support spring and travel wheel.

[0034] The markings of the components in the accompanying drawings are as follows: operating platform 1, groove 1.1, core tube 2, hydraulic cylinder 3, sample pushing rod 4, square groove 4.1, square protrusion 4.2, sample pushing plate 5, funnel 6, cleaning pipe 7, leakage hole 7.1, waste water tank 8, water supply tank 9, sample receiving device 10, sample receiving tube 10.1, connecting mechanism 11, support tube 11.1, adjusting screw 11.2, arc-shaped fixing plate 11.3, supporting spring 12, walking wheel 13, first track 14, first pulley 15, handle 16, second track 17, round hole 17.1, fixing block 18, second pulley 19, third track 20, third pulley 21, water pump 22, water supply pipe 23, nozzle 24, filter screen 25, connecting vessel 26, limit spring 27, elastic limit cap 28, sample 29. Specific implementation method:

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Figure 1-Figure 6 As shown, a sample pushing device for a core tube comprises an operating platform 1, a core tube 2, a hydraulic cylinder 3, a sample pushing rod 4, a sample pushing plate 5, a funnel 6, a cleaning pipe 7, a waste water tank 8, a water supply tank 9 and a sample receiving device 10;

[0037] A core tube 2 is horizontally fixed on the operating platform 1 through a connecting mechanism 11, and the connecting mechanism 11 includes a supporting tube 11.1, an adjusting screw 11.2 and an arc-shaped fixing piece 11.3; the supporting tube 11.1 is a semicircular tube body with open ends, which is convenient for installing and removing the core tube 2. The adjusting screws 11.2 are respectively threaded on the tube walls on both sides of the supporting tube 11.1, and the ends of the adjusting screws 11.2 in the supporting tube 11.1 are respectively fixed with arc-shaped fixing pieces 11.3. The core tube 2 is coaxially fixed in the supporting tube 11.1 through the arc-shaped fixing piece 11.3. By screwing the two adjusting screws 11.2, the two arc-shaped fixing pieces 11.3 are simultaneously abutted against the outer wall of the core tube 2, thereby achieving the purpose of fixing the core tube 2;

[0038] A hydraulic cylinder 3 is provided on an operating platform 1 at one end of the core tube 2, and a telescopic end thereof is arranged toward the core tube 2. A sample push rod 4 is vertically connected to the end surface of the piston end of the hydraulic cylinder 3. A square groove 4.1 is provided at one end of the sample push rod 4. A square protrusion 4.2 matching and connected with the square groove 4.1 is fixed at one end of the sample push rod 4. The square protrusion 4.2 of one sample push rod 4 is clamped in the square groove 4.1 of the next sample push rod 4, so that the sample push rod 4 is assembled and extended. It is detachably connected with the sample push rod 4, specifically: a square groove matching and connected with the square protrusion 4.2 is also provided on the end surface of the piston end of the hydraulic cylinder 3, and the square protrusion 4.2 of the sample push rod 4 is clamped in the square groove 4.1 of the piston end of the hydraulic cylinder 3; the starting end of the first sample push rod 4 is vertically fixedly connected with the plate surface of the sample push plate 5, and the sample push plate 5 is movably placed in the core tube 2, and the sample push rod 4 pushes the sample push plate 5 through the extension of the piston end of the hydraulic cylinder 3, so that the sample 29 in the core tube 2 is ejected;

[0039] A support spring 12 is fixed vertically downward at the bottom of the sample push rod 4 connected to the sample push plate 5, and a travel wheel 13 is fixedly connected to the bottom end of the support spring 12. The support spring 12 and the travel wheel 13 are provided to support the sample push rod 4, which is conducive to the sample push rod 4 pushing the sample push plate 5 to move in the core tube 2;

[0040] A first track 14 perpendicular to the length direction of the core tube 2 is provided on the operating platform 1 below the hydraulic cylinder 3, and a first pulley 15 sliding along the first track 14 is installed at the bottom of the hydraulic cylinder 3. When the push rod 4 needs to be extended, the square protrusion 4.2 end of the original push rod 4 is pulled out from the square groove of the piston end of the hydraulic cylinder 3, and the hydraulic cylinder 3 is pushed to slide along the first track 14 to make it away from the push rod 4; after the push rod 4 to be assembled is assembled and connected with the original push rod 4, the hydraulic cylinder 3 is pushed to slide along the first track 14 again, so that the piston end of the hydraulic cylinder 3 and the center line of the push rod 4 are located on the same straight line, and the end of the newly assembled push rod 4 is assembled and connected with the piston end of the hydraulic cylinder 3; it can be seen from the above that the hydraulic cylinder 3 can slide along the first track 14 through the first pulley 15, so that the hydraulic cylinder 3 is away from the push rod 4, leaving an operating space for lengthening the push rod 4, which is convenient for operation;

[0041] A sample receiving device 10 is provided on the operating platform 1 at the other end of the core tube 2. The sample receiving device 10 is used to hold the cleaned core. The sample receiving device 10 includes a plurality of sample receiving tubes 10.1 arranged side by side and connected in sequence along a direction perpendicular to the length of the core tube 2. The lowest position of the sample receiving tube 10.1 is at the same height as the lowest position of the core tube 2, and one of the sample receiving tubes 10.1 of the sample receiving device 10 is arranged along the same straight line as the core tube 2. In this embodiment, the sample receiving device 10 includes three sample receiving tubes 10.1 arranged along the length of the core tube 2. The sample receiving tube 10.1 is a semicircular tube body with one end open. Handles 16 are respectively fixed at both ends of the sample receiving device 10 along the arrangement direction of the sample receiving tubes 10.1, so that the operator can push and pull the sample receiving device 10 conveniently.

[0042] A groove 1.1 is provided on the operating platform 1 below the sample receiving device 10 along a direction perpendicular to the length of the core tube 2, and a second track 17 is provided at the bottom of the groove 1.1 along the length direction; a fixing block 18 is connected to the bottom of each sample receiving tube 10.1, and a second pulley 19 is provided at the bottom of each fixing block 18 to slide along the second track 17, and the sample receiving device 10 can move in the groove 1.1 along the second track 17 through the second pulley 19; a third track 20 is provided on the side wall of the groove 1.1 along the length direction, and a third pulley 21 is provided on the side wall of each fixing block 18 to slide along the third track 20. The third pulley 21 is provided to slide along the third track 20, which can enhance the stability of the sample receiving device 10 when it moves, and avoid friction between each fixing block 18 and the side wall of the groove 1.1;

[0043] A funnel 6 penetrating the operating platform 1 is fixed between the sample receiving device 10 and the core tube 2. A cleaning tube 7 arranged in the same straight line as the core tube 2 is fixed on the top of the funnel 6. The cleaning tube 7 is a semicircular tube body with open ends. The lowest position of the cleaning tube 7 is at the same height as the lowest position of the sample receiving tube 10.1. A plurality of water leakage holes 7.1 opposite to the funnel 6 are opened at the bottom of the cleaning tube 7. After the sample 29 in the core tube 2 enters the cleaning tube 7 for cleaning, the mud water enters the funnel 6 through the water leakage holes 7.1.

[0044] A water supply tank 9 and a wastewater tank 8 are provided below the operating platform 1. The water supply tank 9 is used to provide clean water for cleaning, and the wastewater tank 8 is used to collect wastewater. A water pump 22 is fixed in the water supply tank 9, and the outlet of the water pump 22 is connected to the water inlet end of the water supply pipe 23. The water outlet end of the water supply pipe 23 is fixedly connected to a nozzle 24 placed above the cleaning pipe 7. The cleaning water is sprayed into the cleaning pipe 7 through the nozzle 24 to quickly clean the mud on the surface of the core to ensure that the core is clean and tidy; a filter screen 25 is vertically provided in the wastewater tank 8, and the bottom of the funnel 6 is placed on one side of the filter screen 25 in the wastewater tank 8. The side wall of the wastewater tank 8 on the other side of the filter screen 25 is connected to the water supply tank 9 through a connecting vessel 26. The muddy water in the funnel 6 enters the wastewater tank 8. After being filtered by the filter screen 25, the silt is deposited on one side of the filter screen 25 in the wastewater tank 8 and discharged through the slag discharge port of the wastewater tank 8. The clean water enters the water supply tank 9 through the connecting vessel 26 for reuse.

[0045] According to the present invention, circular holes 17.1 with opposite positions are respectively opened downwardly on the second track 17 on the front and rear sides of the second pulley 19 along the moving direction of the second pulley 19, and a limiting spring 27 is installed in each circular hole 17.1. An elastic limiting cap 28 is fixed to the top of the limiting spring 27. The second pulley 19 is limited by the limiting spring 27 and the elastic limiting cap 28 to prevent the sample receiving device 10 from shaking when receiving the sample.

[0046] The present invention is provided with an operating platform 1, a connecting mechanism 11, a core tube 2, a hydraulic cylinder 3, a sample pushing rod 4, a sample pushing plate 5 and a sample receiving device 10; the core tube 2 is placed in a supporting tube 11.1 of the connecting mechanism 11, the core tube 2 is coaxially fixed with the supporting tube 11.1, the piston end of the hydraulic cylinder 3 is clamped with the end of the sample pushing rod 4, and at the same time, the sample pushing plate 5 is abutted against the core in the core tube 2; the piston end of the hydraulic cylinder 3 is controlled to extend, and the sample pushing plate 5 is pushed by the sample pushing rod 4 to push the core in the core tube 2 into the sample receiving device 10, so that the core in the core tube 2 is not shaken out by hammering, the order of the samples 29 is not disordered, the geological structure is not destroyed, and the irregularly shaped core is not cracked and broken due to the hammering vibration, and the accumulation, compaction and blocking of the core tube 2 are avoided, so that the core in the core tube 2 can be quickly taken out, and the coring efficiency is improved.

[0047] Secondly, the sample receiving device 10 includes a plurality of sample receiving tubes 10.1. The clean cores are pushed into the corresponding sample receiving tubes 10.1 in sequence, and the samples 29 in the sample receiving tubes 10.1 are marked in sequence according to the serial numbers. The staff can take out the samples 29 strictly according to the serial numbers and stratigraphic order, thus ensuring the structural integrity of the samples 29. At the same time, manpower is saved, and the labor burden of the workers is greatly reduced.

[0048] In addition, the present invention is provided with a cleaning pipe 7, a funnel 6, a waste water tank 8, a water supply tank 9, a water pump 22, a water supply pipe 23 and a nozzle 24. When the water pump 22 is started, water is sprayed out from the water supply tank 9 through the nozzle 24 on the water supply pipe 23 to clean the rock core in the cleaning pipe 7, thereby removing mud on the surface of the rock core and ensuring that the rock core is clean and tidy.

[0049] Embodiment 2: A method for surfacing a sample using a surfacing device for a core tube according to Embodiment 1, comprising the following steps:

[0050] (1) The core tube 2 is coaxially placed between the two arc-shaped fixing pieces 11.3 in the support tube 11.1, and the two adjusting screws 11.2 are screwed so that the two arc-shaped fixing pieces 11.3 are simultaneously clamped on the outer wall of the core tube 2 to fix the core tube 2.

[0051] (2) The piston end of the hydraulic cylinder 3 is in a retracted state, and the piston end of the hydraulic cylinder 3 is aligned with the center line of the support tube 11.1. The end of the sample push rod 4 is engaged with the piston end of the hydraulic cylinder 3. At the same time, the sample push plate 5 is abutted against the core in the core tube 2.

[0052] (3) The piston end of the hydraulic cylinder 3 is controlled to extend, and the sample push plate 5 is pushed through the sample push rod 4 to push the core out of the core tube 2.

[0053] (4) When the push rod 4 needs to be extended, the square protrusion 4.2 of the push rod 4 is pulled out from the square groove of the piston end of the hydraulic cylinder 3, so that the piston end of the hydraulic cylinder 3 is contracted, and the hydraulic cylinder 3 is pushed to slide along the first track 14, so that it is away from the push rod 4;

[0054] After the push rod 4 to be assembled is assembled and connected with the original push rod 4, the hydraulic cylinder 3 is pushed to slide along the first track 14 again, so that the piston end of the hydraulic cylinder 3 and the center line of the push rod 4 are located on the same straight line, and the end of the newly assembled push rod 4 is connected to the piston end of the hydraulic cylinder 3, and step (3) is repeated to push the core in the core tube 2 out to the cleaning tube 7.

[0055] (5) Start the water pump 22, and water is sprayed out from the water supply tank 9 through the nozzle 24 on the water supply pipe 23 to clean the rock core in the cleaning pipe 7 and remove the mud on the surface of the rock core; the mud is discharged from the leakage hole 7.1 and enters the waste water tank 8 through the funnel 6. After the mud is filtered by the filter screen 25, the silt is deposited on one side of the filter screen 25 in the waste water tank 8 and finally discharged through the slag discharge port of the waste water tank 8. The clean water enters the water supply tank 9 through the connecting vessel 26 for reuse.

[0056] (6) The second pulley 19 at the bottom of the fixed block 18 corresponding to one of the sample receiving tubes 10.1 is clamped between the two elastic limiting caps 28. At this time, the center line of the sample receiving tube 10.1 and the cleaning tube 7 are located on the same straight line; the cleaned rock core is pushed into the corresponding sample receiving tube 10.1 by the sample pushing rod 4 until the sample receiving tube 10.1 is filled with rock cores, and then the rock core is cut at the entrance of the sample receiving tube 10.1, and the rock core in the sample receiving tube 10.1 is marked as sample No. 1 29.

[0057] (7) Push the sample receiving device 10 by means of the handle 16, and the second pulley 19 at the bottom of each fixed block 18 moves along the second track 17 in the groove 1.1, so that the second pulley 19 at the bottom of the fixed block 18 corresponding to the next sample receiving tube 10.1 is clamped between the two elastic limiting caps 28; then, repeat steps (4) and (5), and continue to push the cleaned core into the corresponding sample receiving tube 10.1 by means of the sample pushing rod 4, until the corresponding sample receiving tube 10.1 is filled and the core is cut off, and the corresponding samples 29 are marked in sequence according to the serial number.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A top sampling device for a core tube, characterized in that: It includes an operating platform, a core tube, a hydraulic cylinder, a sample pushing rod and a sample pushing plate; the core tube is fixed on the operating platform through a connecting mechanism, and the hydraulic cylinder with a telescopic end facing the core tube is arranged on the operating platform at one end of the core tube, the end surface of the piston end of the hydraulic cylinder is vertically connected to the sample pushing rod, the other end of the sample pushing rod is vertically fixedly connected to the plate surface of the sample pushing plate, and the sample pushing plate is movably placed in the core tube.

2. A core tube top sampling device according to claim 1, characterized in that: A sample receiving device is provided on the operating platform at the other end of the core tube. The sample receiving device includes a plurality of sample receiving tubes which are arranged side by side and connected in sequence along a direction perpendicular to the length of the core tube. The lowest position of the sample receiving tube is at the same height as the lowest position of the core tube.

3. A core tube top sampling device according to claim 2, characterized in that: A funnel penetrating the operating platform is fixed between the sample receiving device and the core tube, a cleaning tube arranged in the same straight line as the core tube is fixed on the top of the funnel, the cleaning tube is a semicircular tube body with open ends, the lowest position of the cleaning tube is at the same height as the lowest position of the core tube, and a plurality of water leakage holes opposite to the funnel are opened at the bottom of the cleaning tube; A water supply tank and a waste water tank are provided below the operating platform. A water pump is fixed in the water supply tank. The outlet of the water pump is connected to the water inlet end of the water supply pipe. The water outlet end of the water supply pipe is fixedly connected to a nozzle placed above the cleaning pipe. A filter is vertically provided in the waste water tank. The bottom of the funnel is placed on one side of the filter in the waste water tank. The side wall of the waste water tank on the other side of the filter is connected to the water supply tank through a communicating vessel.

4. A core tube top sampling device according to any one of claims 1 to 3, characterized in that: The connecting mechanism includes a support tube, an adjusting screw and an arc-shaped fixing plate; the support tube is a semicircular tube body with open ends, the adjusting screws are respectively threaded through the tube walls on both sides of the support tube, the arc-shaped fixing plates are respectively fixed to the ends of the adjusting screws in the support tube, and the core tube is coaxially fixed in the support tube by the arc-shaped fixing plates.

5. A core tube top sampling device according to claim 4, characterized in that: A first track perpendicular to the length direction of the core tube is provided on the operating platform below the hydraulic cylinder, and a first pulley sliding along the first track is installed at the bottom of the hydraulic cylinder.

6. A core tube top sampling device according to claim 2, characterized in that: A groove is provided on the operating platform below the sample receiving device in a direction perpendicular to the length of the core tube, and a second track is provided at the bottom of the groove along the length direction; a fixed block is connected to the bottom of each sample receiving tube, and a second pulley is provided at the bottom of each fixed block to slide along the second track.

7. A core tube top sampling device according to claim 6, characterized in that: A third track is arranged on the side wall of the groove along the length direction, and a third pulley sliding along the third track is arranged on the side wall of each of the fixing blocks.

8. A core tube top sampling device according to claim 6, characterized in that: Circular holes with opposite positions are respectively opened downward on the second rails on both sides of the second pulley along the moving direction of the second pulley, and a limit spring is installed in each of the circular holes, and an elastic limit cap is fixed to the top of the limit spring.

9. A method for plunging a sample using a plunging device for a core barrel according to any one of claims 1 to 8, characterized in that: It includes the following steps: (1) placing the core tube in the support tube of the connecting mechanism, and fixing the core tube and the support tube coaxially by adjusting screws and arc-shaped fixing plates; (2) The piston end of the hydraulic cylinder is clamped with the end of the sample push rod, and at the same time, the sample push plate is abutted against the core in the core tube; (3) Control the extension of the piston end of the hydraulic cylinder, push the sample push plate through the sample push rod, and push the core in the core tube out into the cleaning tube; (4) Start the water pump, and water is sprayed out from the water supply tank through the nozzle on the water supply pipe to clean the core in the cleaning pipe and remove the mud on the surface of the core; (5) Clamp the second pulley at the bottom of the fixed block corresponding to one of the sample receiving tubes between the two elastic limiting caps, and then push the clean core into the corresponding sample receiving tube and mark it as sample No. 1; (6) Push the sample receiving device to replace the next sample receiving tube; then, repeat steps (3) and (4) to push the remaining clean core into the corresponding sample receiving tube and mark the corresponding samples in sequence.

10. The method according to claim 9, characterized in that: When the sample pushing rod needs to be extended, the end of the sample pushing rod is removed from the piston end of the hydraulic cylinder, the piston end of the hydraulic cylinder is controlled to retract, and the hydraulic cylinder is pushed to slide along the first track to move away from the sample pushing rod; after the sample pushing rod to be assembled is assembled and connected with the original sample pushing rod, the hydraulic cylinder is pushed again to slide along the first track back to the initial position, and the end of the newly assembled sample pushing rod is connected to the piston end of the hydraulic cylinder.

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