Rock and soil sample drilling equipment

Abstract

The invention relates to the technical field of rock-soil sampling, in particular to rock-soil sample drilling equipment which comprises a hydraulic lifting device, a driving motor is fixedly mounted on a lifting part of the hydraulic lifting device, a rotating shaft is fixedly connected to the shaft end of an output shaft of the driving motor, and a sampling mechanism is fixedly mounted at the front end of the rotating shaft; the sampling mechanism comprises a cylinder I, a cylinder II is mounted at the bottom end of the cylinder I, and a storage structure is arranged in the cylinder II; a sampling assembly is mounted in the cylinder I, and a plurality of groups of cutting assemblies are mounted on the sampling assembly; a driving assembly is fixedly mounted at the inner top end of the barrel I; in the sampling mechanism, through cooperative arrangement of a driving assembly, a sampling assembly and a cut-off assembly, the columnar sample and the rock stratum can be actively cut off in the drilling process, the columnar sample can be limited in a first cylinder after cut-off, and the stability of rock stratum sampling operation is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical sampling, and specifically, to a geotechnical sample drilling device. Background Technique

[0002] Geotechnical sampling is a very important task in the fields of geological exploration, engineering construction, environmental research, etc. Geotechnical sampling can provide information about the types, distributions, physical and chemical properties of underground rock formations, helping to understand the geological structure and origin. In engineering projects such as buildings, bridges, and tunnels, obtaining geotechnical samples helps with engineering design and foundation design to ensure the safety and stability of the structure.

[0003] Currently, for sampling of relatively shallow soil layers, tools such as sampling shovels or sampling spades are usually used for direct sampling. For deeper rock formations, the general process is to first use drilling equipment to drill holes at the target location, and then lower a sampling device into the holes to sample the soil layer. In specific operations, the sampling device is generally equipped with a lifting mechanism, and the output end of the lifting mechanism is connected to a sampling cylinder. When the lifting mechanism is activated, the sampling cylinder is brought into the drill hole. When the front end of the sampling cylinder contacts the rock formation at the bottom of the hole, the motor is started to drive the sampling cylinder to rotate, and pressure is continuously applied downward, then a sample column is obtained in the sampling cylinder. Subsequently, the sampling cylinder filled with soil samples is lifted from the hole through the lifting mechanism to complete the sampling process.

[0004] However, the sampling cylinder still has the following deficiencies in the process of sampling rock formations: The sampling depth of the sampling cylinder is limited. When the sampling depth is less than the thickness of the rock formation, the bottom end of the sample column in the sampling cylinder may be in a connected state with the rock formation. Therefore, when the sampling cylinder is lifted and recovered, the sample column may not be able to be taken out, and even after the sample column is successfully separated from the rock formation, there is a risk of falling out of the sampling cylinder during the ascending process. Summary of the Invention

[0005] The purpose of the present invention is to provide a geotechnical sample drilling device to solve the problems raised in the above background technique.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A geotechnical sample drilling device includes a hydraulic lifting device. A driving motor is fixedly installed on the lifting part of the hydraulic lifting device. The output shaft end of the driving motor is fixedly connected to a rotating shaft, and a sampling mechanism is fixedly installed at the front end of the rotating shaft; the sampling mechanism includes a sampling cylinder. The sampling cylinder includes a cylinder body one with the top end fixedly connected to the rotating shaft. The bottom end of the cylinder body one is detachably and fixedly installed with a cylinder body two. A first cutting tooth is provided at the bottom end of the cylinder body two, and a storage structure is provided in the cylinder body two; A sampling component is fixedly installed at a position near the bottom end of the first cylinder body, and multiple groups of truncating components are installed on the sampling component; A driving component is fixedly installed at the inner top end of the first cylinder body, and the driving component is in transmission connection with multiple groups of the truncating components.

[0007] Furthermore, an annular groove coaxial with the first cylinder body is formed at the bottom end of the first cylinder body, and a plurality of clamping grooves circumferentially arrayed about the axis of the annular groove are formed on the top surface of the annular groove, and the clamping grooves penetrate through the first cylinder body.

[0008] Furthermore, a first cutting tooth is arranged at the bottom end of the second cylinder body, a clamping ring adapted to the annular groove is fixedly installed at the top end of the second cylinder body, and a plurality of clamping columns circumferentially arrayed about the axis of the clamping ring are fixedly installed on the top surface of the clamping ring. The number of the plurality of clamping columns is equal to the number of the plurality of clamping grooves; When the first cylinder body and the second cylinder body are fixedly connected, the clamping ring is clamped in the annular groove, and the top ends of the plurality of clamping columns respectively slide through the plurality of clamping grooves to the upper part of the first cylinder body; Threads are arranged at the upper position of the periphery of the clamping column, and a nut for locking and fixing between the first cylinder body and the second cylinder body is installed through the threads.

[0009] Furthermore, the storage structure includes an annular storage cavity arranged at the top end of the second cylinder body. The second cylinder body forms a double-wall structure through the annular storage cavity, and the outer wall thickness of the second cylinder body is equal to the wall thickness of the first cylinder body.

[0010] Furthermore, the sampling component includes a mounting ring fixedly installed at a position near the lower part of the inner wall of the first cylinder body. A sampling ring is fixedly installed on the inner wall of the mounting ring. The bottom end of the sampling ring is higher than the bottom end of the first cylinder body, and a second cutting tooth is arranged at the bottom end of the sampling ring; The outer diameter of the sampling ring is equal to the inner diameter of the second cylinder body; A plurality of groups of the truncating components are fixedly installed on the top surface of the mounting ring, and the plurality of groups of truncating components are circumferentially arrayed about the axis of the mounting ring; A plurality of through grooves equal in number to the plurality of groups of truncating components are formed on the periphery of the sampling ring. The through grooves are located above the mounting ring, and the plurality of through grooves are respectively aligned with the plurality of groups of truncating components.

[0011] Furthermore, the truncating component includes a second cylinder body fixedly installed on the mounting ring. There is a gap between the second cylinder body and the sampling ring. A second piston is installed in the second cylinder body. One end of the second piston away from the inner wall of the first cylinder body is fixedly connected with a push-pull rod two. One end of the push-pull rod two away from the second piston slides through one end of the second piston away from the sampling ring to the outside of the second cylinder body, and a mounting seat is fixedly installed at one end of the push-pull rod two away from the second piston. A truncating tool is fixedly installed in the mounting seat; A retaining ring is fixedly installed on the inner wall of the second cylinder block near the inner wall of the first cylinder body. A pipe interface communicating with the inside of the second cylinder block is provided on the periphery of the second cylinder block on the side of the retaining ring away from the second piston. In the initial state, the second piston contacts the retaining ring, the cutting end of the cutting tool extends into the corresponding through groove, and hydraulic oil is contained between the second piston and the end of the second cylinder block away from the sampling ring in the second cylinder block.

[0012] Furthermore, the driving assembly includes a first cylinder block fixedly installed on the inner top surface of the first cylinder body. The first cylinder block is coaxial with the first cylinder body. A first piston is slidably installed in the first cylinder block. The bottom end of the first piston is fixedly connected to a first push rod. The bottom end of the first push rod slidably penetrates the bottom end of the first cylinder block and is fixedly connected to a contact disc. A spring sleeved on the periphery of the first push rod is fixedly connected between the top surface of the contact disc and the bottom surface of the first cylinder block. A retaining ring one is fixedly installed on the inner wall of the first cylinder block near the upper end. A plurality of oil guide pipes equal in number to the plurality of cutting assemblies are fixedly connected to the periphery of the first cylinder block in a through manner. The connection position of the oil guide pipe and the first cylinder block is between the retaining ring one and the top end of the first cylinder block. The far ends of the plurality of oil guide pipes away from the first cylinder block are respectively fixedly connected to the pipe interfaces on the plurality of second cylinder blocks. In the initial state, the bottom surface of the first piston contacts the inner bottom surface of the first cylinder block. Hydraulic oil is contained between the first piston and the top end of the first cylinder block in the first cylinder block, and the oil guide pipes are in a state of being filled with hydraulic oil.

[0013] Furthermore, the bottom surface of the contact disc is knurled.

[0014] Furthermore, a plurality of vertically installed limiting rods are fixedly installed on the top surface of the contact disc. The plurality of limiting rods are circumferentially arrayed about the axis of the first cylinder body. The top ends of the limiting rods slidably penetrate the top end of the first cylinder body to the upper side of the first cylinder body. A first block is fixedly installed on the side of the limiting rod away from the center position of the first cylinder body near the top end. A plurality of limiting assemblies equal in number to the plurality of limiting rods are fixedly installed on the top surface of the first cylinder body.

[0015] Furthermore, the plurality of limiting assemblies are respectively aligned with the plurality of limiting rods, and the limiting assemblies are located on the side of the limiting rods away from the center position of the first cylinder body. The limiting assembly includes a U-shaped seat fixedly installed on the top surface of the first cylinder body. A pin shaft is rotatably installed in the U-shaped seat. A torsion spring is installed between the two ends of the pin shaft and the U-shaped seat. A connecting rod is fixedly installed on the periphery of the pin shaft. Under the torque action of the torsion spring, the connecting rod is in a vertical state, and the end of the first block away from the limiting rod is in extrusion sliding contact with the side surface of the connecting rod. A clamping block 2 for use in conjunction with the clamping block 1 is fixedly mounted at the top position on the side surface of the connecting rod close to the limiting rod.

[0016] Beneficial effects of the present invention: 1. The sampling mechanism can actively cut off the columnar sample from the rock formation during the drilling process through the coordinated arrangement of the driving component, the sampling component, the cutting component and the limiting component, and the columnar sample can be limited in the barrel after cutting off, thereby solving the problem that the columnar sample may not be separated from the rock formation and the columnar sample may fall from the sampling barrel in the existing sampling barrel, and effectively improving the stability of the rock formation sampling operation.

[0017] 2. Through the setting of the annular storage chamber in the second cylinder, it can cooperate with the sampling component to sample both columnar samples and powdery samples; columnar samples are usually used to analyze the overall structure and composition of rock formations, while powdery samples are suitable for detailed chemical analysis and mineral composition research. Two types of samples can be obtained through a single operation, which reduces interference to the site and sampling costs, saves time and human resources, and improves work efficiency.

[0018] 3. The present invention increases the friction between the friction disk and the top surface of the columnar sample by providing a knurling treatment on the bottom surface of the friction disk. Therefore, the friction disk will generate a greater torque on the columnar sample during rotation, and cooperate with the weak position formed on the columnar sample by the cutting tool, making the columnar sample easier to be cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a structural schematic diagram of the sampling mechanism in the present invention in the drilling state; Figure 2 is a three-dimensional schematic diagram of the sampling mechanism of the present invention; Figure 3 yes Figure 2 A three-dimensional schematic diagram from another angle; Figure 4 yes Figure 3 A magnified view of part A; Figure 5 yes Figure 3 A magnified view of part B; Figure 6 It is a three-dimensional schematic diagram of the cylinder 2 in the present invention; Figure 7 yes Figure 6 A three-dimensional schematic diagram from another angle; Figure 8 It is a three-dimensional schematic diagram of the internal structure of the first cylinder in the present invention; Figure 9 is Figure 8 a three-dimensional schematic diagram from another angle; Figure 10 is Figure 8 an enlarged view of part D in; Figure 11 is Figure 8 an enlarged view of part C in; Figure 12 It is a structural schematic diagram of the driving component in the present invention; Figure 13 It is a structural schematic diagram of the truncating component in the present invention; The reference signs in the figure are as follows: 1 - the first cylinder, 2 - the second cylinder, 3 - the rotating shaft, 4 - the first cutting teeth, 5 - the snap ring, 6 - the snap post, 7 - the annular storage cavity, 8 - the nut, 9 - the clamping groove, 10 - the truncating component, 11 - the annular groove, 12 - the mounting ring, 13 - the sampling ring, 14 - the oil guide pipe, 15 - the second cutting teeth, 16 - the first cylinder block, 17 - the limiting rod, 18 - the abutting disc, 19 - the spring, 20 - the first clamping block, 21 - the U-shaped seat, 22 - the pin shaft, 23 - the connecting rod, 24 - the second clamping block, 25 - the second cylinder block, 26 - the mounting seat, 27 - the truncating tool, 28 - the through groove, 29 - the second piston, 30 - the second retaining ring, 31 - the second push-pull rod, 32 - the first retaining ring, 33 - the first piston, 34 - the first push-pull rod, 35 - the columnar sample, 36 - the powdery sample. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 3 and Figures 5 to 13 , in the embodiment of the present invention, a geotechnical sample drilling device includes a hydraulic lifting device. A driving motor is fixedly installed on the lifting part of the hydraulic lifting device. The shaft end of the output shaft of the driving motor is fixedly connected to a rotating shaft 3, and a sampling mechanism is fixedly installed at the front end of the rotating shaft 3; the sampling mechanism includes a sampling cylinder, and the sampling cylinder includes a first cylinder 1 fixedly connected to the rotating shaft 3 at the top. The bottom end of the first cylinder 1 is detachably and fixedly installed with a second cylinder 2. The bottom end of the second cylinder 2 is provided with first cutting teeth 4, and a storage structure is arranged in the second cylinder 2; A sampling assembly is fixedly installed at a position near the bottom end in the first cylinder 1, and multiple sets of truncating assemblies 10 are installed on the sampling assembly; A driving assembly is fixedly installed at the inner top end of the first cylinder 1, and the driving assembly is in transmission connection with multiple sets of truncating assemblies 10.

[0022] During the process of sampling the rock stratum with the existing sampling cylinder, due to the limited sampling depth of the sampling cylinder, when the sampling depth is less than the thickness of the rock stratum, the bottom end of the sample column in the sampling cylinder may be in a connected state with the rock stratum. Therefore, when the sampling cylinder is lifted and recovered, the situation where the sample column cannot be taken out may occur, and even when the sample column is successfully separated from the rock stratum, there is also a risk of falling out of the sampling cylinder during the ascending process.

[0023] When the present invention is in use: Lower the sampling mechanism through the hydraulic lifting device until the bottom end of the second cylinder 2 in the sampling mechanism contacts the rock stratum. Then start the driving motor, and the hydraulic lifting device continues to descend, thereby driving the sampling mechanism to perform a drilling action; During the drilling process of the sampling mechanism, the cutting teeth 1 at the bottom end of the second cylinder 2 cut the rock and soil, so that the rock column enters the second cylinder 2. After the rock column passes through the sampling mechanism in the first cylinder 1, a columnar sample 35 is formed. When the top end of the columnar sample 35 abuts against the driving assembly at the inner top end position of the first cylinder 1, the driving assembly will synchronously drive multiple sets of truncating assemblies 10, and the multiple sets of truncating assemblies 10 will truncate and separate the columnar sample 35 from the rock column at the bottom position of the columnar sample 35, thereby realizing the active separation between the columnar sample 35 and the rock stratum during the drilling process, solving the problem that the columnar sample 35 may not be taken out due to the fixed connection between the columnar sample 35 and the rock stratum during sampling with the existing sampling cylinder, and effectively improving the stability of the rock and soil sampling operation.

[0024] Among them, the sampling assembly includes a mounting ring 12 fixedly installed at a position near the lower part on the inner wall of the first cylinder 1. A sampling ring 13 is fixedly installed on the inner wall of the mounting ring 12. The bottom end of the sampling ring 13 is higher than the bottom end of the first cylinder 1, and cutting teeth 2 are provided at the bottom end of the sampling ring 13; The outer diameter of the sampling ring 13 is equal to the inner diameter of the second cylinder 2; Multiple sets of truncating assemblies 10 are fixedly installed on the top surface of the mounting ring 12, and the multiple sets of truncating assemblies 10 are circumferentially arrayed about the axis of the mounting ring 12; A plurality of through slots 28 equal in number to the multiple sets of truncating assemblies 10 are formed on the periphery of the sampling ring 13. The through slots 28 are located above the mounting ring 12, and the plurality of through slots 28 are respectively aligned with the multiple sets of truncating assemblies 10.

[0025] Among them, the truncation component 10 includes a cylinder body two 25 fixedly installed on the mounting ring 12. There is a gap between the cylinder body two 25 and the sampling ring 13. A piston two 29 is installed in the cylinder body two 25. One end of the piston two 29 far from the inner wall of the cylinder body one 1 is fixedly connected to a push-pull rod two 31. One end of the push-pull rod two 31 far from the piston two 29 slides through one end of the piston two 29 far from the sampling ring 13 to the outside of the cylinder body two 25, and a mounting seat 26 is fixedly installed at one end of the push-pull rod two 31 far from the piston two 29. A truncation cutter 27 is fixedly installed in the mounting seat 26; A retaining ring 30 is fixedly installed on the inner wall of the cylinder body two 25 near the inner wall of the cylinder body one 1. A pipe interface communicating with the inside of the cylinder body two 25 is arranged on the periphery of the cylinder body two 25 on the side of the retaining ring 30 far from the piston two 29; In the initial state, the piston two 29 is in contact with the retaining ring 30, the cutting end of the truncation cutter 27 extends into the through groove 28 at the corresponding position, and hydraulic oil is contained between the piston two 29 and the end of the cylinder body two 25 far from the sampling ring 13 in the cylinder body two 25.

[0026] Among them, the driving component includes a cylinder body one 16 fixedly installed on the inner top surface of the cylinder body one 1. The cylinder body one 16 is coaxial with the cylinder body one 1. A piston one 33 is slidably installed in the cylinder body one 16. The bottom end of the piston one 33 is fixedly connected to a push-pull rod one 34. The bottom end of the push-pull rod one 34 slides through the bottom end of the cylinder body one 16 and is fixedly connected to a contact disk 18. A spring 19 sleeved on the periphery of the push-pull rod one 34 is fixedly connected between the top surface of the contact disk 18 and the bottom surface of the cylinder body one 16; A retaining ring one 32 is fixedly installed on the inner wall of the cylinder body one 16 near the upper end. A plurality of oil guide pipes 14 equal in number to the number of groups of truncation components 10 are fixedly connected to the periphery of the cylinder body one 16 in a through manner. The connection position of the oil guide pipes 14 and the cylinder body one 16 is between the retaining ring one 32 and the top end of the cylinder body one 16; One ends of the plurality of oil guide pipes 14 far from the cylinder body one 16 are respectively fixedly connected to the pipe interfaces on the plurality of cylinder bodies two 25; In the initial state, the bottom surface of the piston one 33 is in contact with the inner bottom surface of the cylinder body one 16. Hydraulic oil is contained between the piston one 33 and the top end of the cylinder body one 16 in the cylinder body one 16, and the oil guide pipes 14 are in a state of being filled with hydraulic oil.

[0027] Among them, a plurality of vertically installed limiting rods 17 are fixedly installed on the top surface of the contact disk 18. The plurality of limiting rods 17 are circumferentially arrayed about the axis of the cylinder body one 1. The top ends of the limiting rods 17 slide through the top end of the cylinder body one 1 to the upper side of the cylinder body one 1. A clamping block one 20 is fixedly installed on the side of the limiting rod 17 far from the central position of the cylinder body one 1 near the top end; A plurality of limiting components equal in number to the plurality of limiting rods 17 are fixedly installed on the top surface of the cylinder body one 1.

[0028] Among them, the plurality of limit assemblies are respectively aligned with the plurality of limit rods 17, and the limit assemblies are located on the side of the limit rod 17 away from the center position of the cylinder body 1; The limiting assembly includes a U-shaped seat 21 fixedly mounted on the top surface of the cylinder 1, a pin 22 is rotatably mounted in the U-shaped seat 21, torsion springs are installed between the two ends of the pin 22 and the U-shaped seat 21, and a connecting rod 23 is fixedly mounted on the periphery of the pin 22; Under the torsion force of the torsion spring, the connecting rod 23 is in a vertical state, and the end of the clamping block 20 away from the limiting rod 17 is in extrusion sliding contact with the side surface of the connecting rod 23; A second clamping block 24 for use with the first clamping block 20 is fixedly mounted at the top position on the side surface of the connecting rod 23 close to the limiting rod 17 .

[0029] When sampling: In the sampling assembly, the rotation of the sampling ring 13 cooperates with the cutting teeth 15 to cut the rock column passing through the sampling ring 13, thereby forming a columnar sample 35; When the columnar sample 35 contacts the driving component, the top of the columnar sample 35 squeezes the abutment plate 18, and the push-pull rod 134 drives the piston 133 to gradually rise in the cylinder body 16. During the rising process of the piston 13, the hydraulic oil in the cylinder body 16 is squeezed into the multiple groups of cut-off components 10 through the multiple oil guide pipes 14, thereby realizing the driving of the multiple groups of cut-off components 10. The rise of the abutment plate 18 also drives the multiple limit rods 17 to rise. When the block 120 passes the block 24, the bottom end of the block 120 will be limited to the top surface of the block 24, and the spring 19 is in a compressed state. At this time, the downward pressure on the sampling mechanism is stopped; In the cut-off assembly 10, hydraulic oil enters the cylinder body 25, causing the piston 29 to slide, and the push-pull rod 21 drives the cutting end of the cut-off tool 27 to gradually move into the sampling ring 13; it should be noted that the initial distance between the abutment plate 18 and the cylinder body 16 is greater than the initial distance between the clamping block 1 20 and the clamping block 24 for clamping, and when the clamping block 24 and the clamping block 1 20 are just in the clamping state, the cutting end of the cut-off tool 27 just completely enters the sampling ring 13; There are two situations in which the cut end of the cutting tool 27 enters the sampling ring 13: Case 1: Under ideal conditions, when the cutting end of the cutting tool 27 has not fully extended into the sampling ring 13, the columnar sample 35 has been cut. At this time, the rock column passing through the sampling ring 13 can continue to be cut by the cutting end of the cutting tool 27, so the columnar sample 35 can continue to rise, thereby raising the abutment plate 18 to a state where the clamping block 1 20 and the clamping block 2 24 are in a clamping state; at this time, the cutting ends of multiple cutting tools 27 are located below the columnar sample 35, thereby limiting the columnar sample 35 between the abutment plate 18 and the cutting ends of multiple cutting tools 27, which can prevent the columnar sample 35 from falling.

[0030] Case 2: When the cutting end of the truncation tool 27 is fully extended into the sampling ring 13, the columnar sample 35 is not truncation. At this time, the cutting ends of multiple truncation tools 27 are all extended into the columnar sample 35. This position is a weak position of the columnar sample 35. Therefore, during subsequent lifting, the columnar sample 35 and the rock column can be gradually torn apart by cooperating with the limiting ends of the cutting ends of multiple truncation tools 27. Therefore, the purpose of truncation of the columnar sample 35 can still be achieved, and the formed columnar sample 35 is also limited between the abutment disk 18 and the cutting ends of multiple truncation tools 27.

[0031] When the columnar sample 35 needs to be taken out from the barrel 1, the multiple connecting rods 23 are rotated to separate the multiple clamping blocks 24 from the multiple clamping blocks 1 20. At this time, under the action of the restoring elastic force of the spring 19, the abutment plate 18 is lowered and reset, and the multiple cutting components 10 are also reset. The cutting end of the cutting tool 27 will shrink into the through groove 28. At this time, the limit at the bottom of the columnar sample 35 disappears, and the columnar sample 35 can be taken out from the barrel 1. In the process of taking out the cylinder 25: For the first case, the length of the columnar sample 35 is smaller than the distance between the cutting end of the cutting tool 27 and the abutment plate 18, so it will not interfere with the synchronous resetting of the abutment plate 18 and the cutting tool 27; For the second situation, since the cutting end of the cutting tool 27 gradually extends into the sampling ring 13, the cutting end of the cutting tool 27 forms a cone at the bottom end of the columnar sample 35. Therefore, the descent of the resistance plate 18 and the contraction of the cutting end of the cutting tool 27 can also be carried out simultaneously, and the columnar sample 35 will not cause resetting interference.

[0032] Therefore, through the coordinated arrangement of the driving component, the sampling component, the cutting component 10 and the limiting component in the sampling mechanism, the columnar sample 35 can be actively cut off from the rock formation during the drilling process, and the columnar sample 35 can be limited in the cylinder body 1 after cutting off, thereby solving the problem that the columnar sample 35 may not be separated from the rock formation and the columnar sample 35 may fall from the sampling cylinder in the existing sampling cylinder, and effectively improving the stability of the rock formation sampling operation.

[0033] Embodiment 2: Please refer to Figures 1 to 4 and Figures 6 to 8 Based on Embodiment 1, a ring groove 11 coaxial with the first cylinder 1 is provided at the bottom end of the first cylinder 1. A plurality of clamping grooves 9 are provided on the top surface of the ring groove 11 and are circumferentially arrayed about the axis of the ring groove 11. The clamping grooves 9 penetrate through the first cylinder 1.

[0034] A first cutting tooth 4 is provided at the bottom end of the second cylinder 2. A snap ring 5 adapted to cooperate with the ring groove 11 is fixedly installed at the top end of the second cylinder 2. A plurality of clamping posts 6 are fixedly installed on the top surface of the snap ring 5 and are circumferentially arrayed about the axis of the snap ring 5. The number of the plurality of clamping posts 6 is equal to the number of the plurality of clamping grooves 9. When the first cylinder 1 and the second cylinder 2 are fixedly connected, the snap ring 5 is clamped in the ring groove 11, and the top ends of the plurality of clamping posts 6 respectively slide through the plurality of clamping grooves 9 to the upper side of the first cylinder 1. Threads are provided at the upper position of the periphery of the clamping post 6, and a nut 8 for locking and fixing between the first cylinder 1 and the second cylinder 2 is installed through the threads.

[0035] Through the cooperation of the snap ring 5, the clamping posts 6, the nut 8, the clamping grooves 9 and the ring groove 11, a detachable fixed connection mode between the first cylinder 1 and the second cylinder 2 is realized. Through the detachability between the first cylinder 1 and the second cylinder 2, the powdery sample 36 in the annular storage cavity 7 can be obtained after the second cylinder 2 is disassembled, improving the practicability of the present invention.

[0036] Embodiment 3: Please refer to Figure 1 and Figure 7 Based on Embodiment 2, the storage structure includes an annular storage cavity 7 provided at the top end of the second cylinder 2. The second cylinder 2 forms a double-wall structure through the annular storage cavity 7, and the outer wall thickness of the second cylinder 2 is equal to the wall thickness of the first cylinder 1.

[0037] During the process of the sampling ring 13 cutting the rock column, a powdery sample 36 will also be formed. The formed powdery sample 36 will fall into the annular storage cavity 7 of the second cylinder 2 and be collected. Therefore, through the arrangement of the annular storage cavity 7 in the second cylinder 2, it can cooperate with the sampling assembly to sample the powdery sample 36 while sampling the columnar sample 35; the columnar sample 35 is usually used to analyze the overall structure and composition of the rock stratum, while the powdery sample 36 is suitable for detailed chemical analysis and mineral composition research. Obtaining two samples through a single operation reduces the interference to the site and the sampling cost, saves time and human resources, and improves the work efficiency.

[0038] Embodiment 4: Based on Embodiment 3, knurling treatment is performed on the bottom surface of the abutting disc 18.

[0039] The friction between the abutting disk 18 and the top surface of the columnar sample 35 is increased by the knurling treatment on the bottom surface of the abutting disk 18. Therefore, during rotation, the abutting disk 18 will generate a greater torsional force on the columnar sample 35. In cooperation with the weak position formed by the cutting tool 27 on the columnar sample 35, the columnar sample 35 is more easily truncated.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A rock sample drilling device, comprising a hydraulic lifting device, a driving motor is fixedly installed on the lifting part of the hydraulic lifting device, a rotating shaft (3) is fixedly connected to the output shaft end of the driving motor, and a sampling mechanism is fixedly installed at the front end of the rotating shaft (3); characterized in that: The sampling mechanism comprises a sampling cylinder, the sampling cylinder comprising a cylinder body (1) whose top end is fixedly connected to a rotating shaft (3), a cylinder body (2) being detachably fixedly mounted at the bottom end of the cylinder body (1), a cutting tooth (4) being arranged at the bottom end of the cylinder body (2), and a storage structure being arranged in the cylinder body (2); A sampling assembly is fixedly mounted in the cylinder body 1 (1) at a position close to the bottom end, and a plurality of groups of cut-off assemblies (10) are mounted on the sampling assembly; A driving assembly is fixedly mounted on the inner top end of the cylinder body 1 (1), and the driving assembly is transmission-connected to the plurality of groups of the cutting assemblies (10).

2. A rock sample drilling device according to claim 1, characterized in that: The bottom end of the cylinder body 1 (1) is provided with an annular groove (11) coaxial with the cylinder body 1 (1), and the top surface of the annular groove (11) is provided with a plurality of slots (9) distributed in an array circumferentially about the axis of the annular groove (11), and the slots (9) penetrate the cylinder body 1 (1).

3. A rock sample drilling device according to claim 2, characterized in that: The bottom end of the second cylinder (2) is provided with a cutting tooth (4), the top end of the second cylinder (2) is fixedly provided with a clamping ring (5) for use with the annular groove (11), and the top surface of the clamping ring (5) is fixedly provided with a plurality of clamping columns (6) arranged in an array circumferentially with respect to the axis of the clamping ring (5), the number of the plurality of clamping columns (6) is equal to the number of the plurality of clamping grooves (9); When the cylinder body 1 (1) and the cylinder body 2 (2) are fixedly connected, the clamping ring (5) is clamped in the annular groove (11), and the top ends of the plurality of clamping columns (6) slide through the plurality of clamping grooves (9) to the top of the cylinder body 1 (1); A thread is provided at the upper portion of the periphery of the clamping column (6), and a nut (8) is installed through the thread to lock and fix the cylinder body 1 (1) and the cylinder body 2 (2).

4. A rock sample drilling device according to claim 3, characterized in that: The storage structure comprises an annular storage cavity (7) arranged at the top end of the second cylinder (2); the second cylinder (2) forms a double-wall structure through the annular storage cavity (7); the outer wall thickness of the second cylinder (2) is equal to the wall thickness of the first cylinder (1).

5. The rock sample drilling device according to claim 1, characterized in that: The sampling assembly comprises a mounting ring (12) fixedly mounted on the inner wall of the first cylinder (1) near the lower part, a sampling ring (13) fixedly mounted on the inner wall of the mounting ring (12), the bottom end of the sampling ring (13) being higher than the bottom end of the first cylinder (1), and a second cutting tooth (15) being provided at the bottom end of the sampling ring (13); The outer diameter of the sampling ring (13) is equal to the inner diameter of the second cylinder (2); A plurality of groups of the truncation components (10) are fixedly mounted on the top surface of the mounting ring (12), and the plurality of groups of the truncation components (10) are distributed in an array in a circumferential direction about the axis of the mounting ring (12); A plurality of through slots (28) equal in number to the plurality of groups of cut-off components (10) are provided on the periphery of the sampling ring (13); the through slots (28) are located above the mounting ring (12), and the plurality of through slots (28) are respectively aligned with the plurality of groups of cut-off components (10).

6. A rock sample drilling device according to claim 5, characterized in that: The cutting assembly (10) comprises a cylinder body (25) fixedly mounted on the mounting ring (12), a gap being formed between the cylinder body (25) and the sampling ring (13), a piston (29) being mounted in the cylinder body (25), an end of the piston (29) away from the inner wall of the cylinder body (1) being fixedly connected to a push-pull rod (31), an end of the push-pull rod (31) away from the piston (29) slidingly passing through an end of the piston (29) away from the sampling ring (13) to the outside of the cylinder body (25), and an installation seat (26) being fixedly mounted on an end of the push-pull rod (31) away from the piston (29), a cutting tool (27) being fixedly mounted in the installation seat (26); A retaining ring (30) is fixedly mounted on the inner wall of the second cylinder body (25) at a position close to the inner wall of the first cylinder body (1), and a pipe interface that penetrates the interior of the second cylinder body (25) is provided on the outer periphery of the second cylinder body (25) at a position on the side of the retaining ring (30) away from the second piston (29); In the initial state, the second piston (29) is in contact with the retaining ring (30), the cutting end of the cutting tool (27) extends into the through groove (28) at the corresponding position, and hydraulic oil is contained in the second cylinder (25) between the second piston (29) and the end of the second cylinder (25) away from the sampling ring (13).

7. A rock sample drilling device according to claim 6, characterized in that: The driving assembly comprises a cylinder body (16) fixedly mounted on the inner top surface of a cylinder body (1), the cylinder body (16) being coaxial with the cylinder body (1), a piston (33) being slidably mounted in the cylinder body (16), the bottom end of the piston (33) being fixedly connected to a push-pull rod (34), the bottom end of the push-pull rod (34) slidingly passing through the bottom end of the cylinder body (16) and then fixedly connected to a contact plate (18), a spring (19) being fixedly connected between the top surface of the contact plate (18) and the bottom surface of the cylinder body (16) and being sleeved on the outer periphery of the push-pull rod (34); A retaining ring (32) is fixedly mounted on the inner wall of the cylinder body (16) near the upper end, and a plurality of oil guide pipes (14) equal in number to the plurality of groups of the cut-off assemblies (10) are fixedly connected through the outer periphery of the cylinder body (16), wherein the connection between the oil guide pipes (14) and the cylinder body (16) is located between the retaining ring (32) and the top end of the cylinder body (16); One end of the plurality of oil guide pipes (14) away from the cylinder body one (16) is fixedly connected to the pipe interfaces on the plurality of cylinder bodies two (25); In the initial state, the bottom surface of the piston one (33) contacts the inner bottom surface of the cylinder body one (16), hydraulic oil is contained in the cylinder body one (16) between the top of the piston one (33) and the cylinder body one (16), and the oil guide pipe (14) is filled with hydraulic oil.

8. A rock sample drilling device according to claim 7, characterized in that: The bottom surface of the abutment plate (18) is knurled.

9. The rock sample drilling device according to claim 7, characterized in that: A plurality of vertically mounted limit rods (17) are fixedly mounted on the top surface of the abutment disk (18), and the plurality of limit rods (17) are arranged in a circumferential array about the axis of the cylinder body (1). The top ends of the limit rods (17) slide through the top end of the cylinder body (1) to the top of the cylinder body (1), and a clamping block (20) is fixedly mounted on one side of the limit rod (17) away from the center of the cylinder body (1) at a position close to the top end. A plurality of groups of limit assemblies, the number of which is equal to the number of limit rods (17), are fixedly mounted on the top surface of the cylinder body 1 (1).

10. A rock sample drilling device according to claim 9, characterized in that: The plurality of groups of the limit assemblies are respectively aligned with the plurality of limit rods (17), and the limit assemblies are located on a side of the limit rod (17) away from the center position of the cylinder body (1); The limiting assembly comprises a U-shaped seat (21) fixedly mounted on the top surface of the cylinder body (1), a pin shaft (22) being rotatably mounted in the U-shaped seat (21), torsion springs being mounted between the two ends of the pin shaft (22) and the U-shaped seat (21), and a connecting rod (23) being fixedly mounted on the periphery of the pin shaft (22); Under the torsion force of the torsion spring, the connecting rod (23) is in a vertical state, and an end of the clamping block (20) away from the limiting rod (17) is in extrusion sliding contact with a side surface of the connecting rod (23); A second clamping block (24) for use with the first clamping block (20) is fixedly mounted at the top position on the side surface of the connecting rod (23) close to the limiting rod (17).

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