Gannan drill for soil layer sampling

Abstract

The invention relates to the technical field of soil layer sampling equipment, and particularly discloses a soil layer sampling Gannan drill which comprises a rack, a drill pipe, a sampling drill bit and a driving part, a mounting platform is vertically and slidably arranged on the rack, and the drill pipe is rotatably arranged on the mounting platform; a driving pipe is coaxially and rotatably arranged in the drill pipe, a guide seat is arranged in the drill pipe, a driving rod is connected to the guide seat through a spline, and the upper end of the driving rod extends into the driving pipe and is in threaded fit with the driving pipe; the sampling drill bit is arranged at the lower end of the drill pipe and comprises a mounting seat, a left drill bit and a right drill bit, the left drill bit and the right drill bit are slidably arranged on the mounting seat, the mounting seat is connected with the lower end of the drill pipe, and a left push rod and a right push rod are hinged to the lower end of the driving rod. A left sampling cavity is formed in the left drill bit, and a right sampling cavity is formed in the right drill bit; the driving piece drives the drilling pipe and the driving pipe to rotate through the transmission piece. The problems that a traditional manual impact sampling drilling tool is insufficient in manual drilling power, small in sampling depth and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil sampling equipment, and more specifically, to a Gannan drill for soil sampling. Background Art

[0002] The Gannan drill - a manual impact sampling drill is a prospecting sampling drill developed through continuous improvement and innovation based on the Luoyang shovel. It is characterized by low consumption, safety, environmental protection, and high efficiency; it is suitable for the main prospecting means targeting the completely weathered layer, especially for the exploration and evaluation of weathered crust ion-adsorption rare earth minerals, and can also be used for the detailed exploration and evaluation of other weathered crust-type deposits. Among them, the manual impact sampling drill has certain advantages such as simple operation, convenient carrying, small disturbance to soil samples, and high soil sample collection rate. However, it still faces problems such as single function and insufficient manual drilling power resulting in shallow sampling depth. To sample soil in deeper soil layers, relatively large drilling equipment is required. Summary of the Invention

[0003] The purpose of the present invention is to provide a Gannan drill for soil sampling, which is simple to operate, convenient to carry, has small disturbance to soil samples, and high soil sample collection rate, while solving the problems of insufficient manual drilling power and shallow sampling depth of traditional manual impact sampling drills.

[0004] The present invention is realized through the following technical solutions: A Gannan drill for soil sampling includes a frame, a drill pipe, a sampling drill bit, and a driving member. An installation platform is vertically slidably arranged on the frame, and the drill pipe is rotatably arranged on the installation platform; a driving pipe is coaxially rotatably arranged inside the drill pipe. A guiding seat is arranged inside the drill pipe below the driving pipe. A driving rod is vertically slidably arranged on the guiding seat, and the driving rod is spline-connected to the guiding seat. The upper end of the driving rod extends into the driving pipe and is in threaded cooperation with the driving pipe;

[0005] The sampling drill bit is coaxially arranged at the lower end of the drill pipe. The sampling drill bit includes a mounting seat and a left drill bit and a right drill bit symmetrically arranged with each other. The upper end of the mounting seat is connected to the lower end of the drill pipe. A slide rail is arranged on the mounting seat. The left drill bit and the right drill bit are both slidably arranged on the slide rail. The lower end of the driving rod is hinged with a left push rod and a right push rod. The left push rod is hinged with the left drill bit, and the right push rod is hinged with the right drill bit; a left sampling cavity is arranged on one side of the left drill bit close to the right drill bit, and a right sampling cavity is arranged on one side of the right drill bit close to the left drill bit;

[0006] The driving member is arranged on the installation platform, and the driving member drives the drill pipe and the driving pipe to rotate respectively through transmission members.

[0007] Further, it further includes a hole enlarging member, and the hole enlarging member includes several hole enlarging drill bits;

[0008] A plurality of the reaming bits are arranged in an annular array around the drill pipe. A plurality of sliding grooves are formed in the drill pipe in an annular array. The sliding grooves are parallel to the axis of the drill pipe. The reaming bit includes a sliding seat, a first support arm, and a second support arm that are distributed in sequence from top to bottom. The sliding seat is slidably arranged in the sliding groove. One end of the first support arm is hinged to the sliding seat, the other end of the first support arm is hinged to one end of the second support arm, and the end of the second support arm away from the first support arm is hinged to the lower end of the sliding groove;

[0009] A plurality of teeth are arranged on both the first support arm and the second support arm.

[0010] Further, the reaming member further includes a main drive seat, a sub-drive seat, and a plurality of sliding rods. The main drive seat is coaxially arranged in the drill pipe and is in threaded cooperation with the drill pipe; the driving member drives the main drive seat to rotate through the transmission member;

[0011] The sub-drive seat is located below the main drive seat and is slidably arranged in the drill pipe. A connecting pipe is rotatably connected to the top of the sub-drive seat, and the upper end of the connecting pipe is connected to the main drive seat;

[0012] A plurality of the sliding rods are arranged in an annular array at the bottom of the sub-drive seat, and the lower ends of the plurality of sliding rods are respectively connected to the plurality of sliding seats.

[0013] Further, the transmission member includes a spline shaft, a transmission seat, a transmission outer pipe, and a transmission inner pipe. The spline shaft is rotatably arranged on the installation platform, and the upper end of the spline shaft is in transmission connection with the driving member;

[0014] The transmission seat is slidably sleeved on the spline shaft and is in spline connection with the spline shaft. A transmission outer pipe and a transmission inner pipe are coaxially arranged at the lower end of the transmission seat. The transmission inner pipe is located inside the transmission outer pipe, and the upper end of the drill pipe extends between the transmission outer pipe and the transmission inner pipe;

[0015] A first external spline and a second external spline are arranged at intervals on the outer side of the drill pipe. The first external spline is located above the second external spline. A first internal spline is arranged on the inner side of the transmission outer pipe. By driving the transmission seat to move up and down on the installation platform, the first internal spline is respectively engaged with the first external spline and the second external spline;

[0016] A third external spline is arranged on the driving pipe, and a second internal spline is arranged on the inner side of the transmission inner pipe. When the second internal spline is engaged with the third external spline, the first internal spline is not engaged with the first external spline or the second external spline.

[0017] Further, a fourth external spline is provided on the outer wall of the transmission inner tube, and a third internal spline is provided on the main drive seat. When the third internal spline cooperates with the fourth external spline, the first internal spline does not cooperate with the first external spline or the second external spline, and the second internal spline does not cooperate with the third external spline.

[0018] Further, the height of the fourth external spline is higher than that of the first external spline, and the height of the third external spline is lower than that of the first external spline and higher than that of the second external spline.

[0019] Further, the driving member is a speed reducer, and the spline shaft is coaxially arranged with the driving tube and is rotatably connected thereto.

[0020] Further, the transmission member further includes a bushing and a plurality of push cylinders. The transmission seat and the transmission outer tube are rotatably arranged in the bushing;

[0021] A plurality of the push cylinders are arranged in an annular array on the installation platform. The push cylinders are arranged vertically, and the telescopic ends of the push cylinders pass through the installation platform and are connected to the bushing.

[0022] Further, a first spiral blade is arranged around the sampling drill bit. The first spiral blade is composed of a left spiral blade and a right spiral blade. The left spiral blade is fixedly arranged on the left drill bit, and the right spiral blade is fixedly arranged on the right drill bit;

[0023] A second spiral blade is arranged around the drill pipe.

[0024] Further, a plurality of guide rails are arranged vertically on the frame, and the installation platform is slidably connected to the plurality of guide rails;

[0025] A fixed pulley is arranged at the top of the frame, and a winch is further arranged on the frame. The free end of the steel wire rope on the winch is wound around the fixed pulley and then connected to the installation platform.

[0026] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0027] 1. After the drill pipe and the sampling drill bit are driven by the speed reducer to drill to the target depth, the transmission seat is driven to move upward, so that the second internal spline on the transmission inner tube meshes with the third external spline on the driving tube. Then, at this time, the transmission member drives the driving tube to rotate alone, and then the left drill bit and the right drill bit are separated from each other; continue to drill downward. At this time, the soil sample gradually enters the sampling cavity or the semi-closed tube, and the driving tube is rotated in the reverse direction. Finally, the left drill bit and the right drill bit are controlled to close or clamp the target sample soil. Then, the entire installation platform is lifted by the winch, so that the sampling drill bit moves to the ground. Then, the sample soil is taken out, packaged and marked to complete the sampling of the deeper soil layer.

[0028] 2. When adjusting the reaming drill bit before drilling, first control the transmission seat, the transmission outer tube and the transmission inner tube to move downward, so that the fourth outer spline on the transmission inner tube is engaged with the third inner spline on the main drive seat, and then the main drive seat is driven by the reducer to rotate downward in the drill pipe. At the same time, a number of slides move downward, so that a number of first arms and second arms are adjusted from a straight angle to an obtuse angle. Then, the first arms and the second arms have a larger range of cutting and excavating soil during the rotation of the drill pipe. After loosening the soil in the borehole, it can avoid greater resistance to the drilling or extraction of the drill pipe, which is more conducive to the drilling and extraction of the drill pipe.

[0029] 3. Two push cylinders are used to control the up and down movement of the transmission seat on the mounting platform, and cooperate with the reducer to act on the first external spline, the second external spline, the third external spline and the fourth external spline respectively, so as to control the rotation of the drill pipe, the expansion and closing of the sampling drill bit, and the expansion and closing of the reaming drill bit. The various steps do not interfere with each other. Through the up and down movement of one transmission part, the rotation of the drill pipe, the expansion and closing of the sampling drill bit, and the expansion and closing of the reaming drill bit can be controlled respectively, which meets multiple functions while greatly simplifying the overall structure. The system is stable and reliable and convenient for outdoor sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of the main structure of a Gannan drill for soil layer sampling provided by the present invention;

[0032] Figure 2 A schematic diagram of the side structure of a Gannan drill for soil layer sampling provided by the present invention;

[0033] Figure 3 A cross-sectional structural diagram of the cooperation of a drill pipe, a drive pipe, a transmission member and a hole expansion member in a Gannan drill for soil layer sampling provided by the present invention;

[0034] Figure 4 for Figure 3 A magnified schematic diagram of the structure at center A;

[0035] Figure 5 for Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0036] Icons: 1. Frame, 11. Mounting platform, 12. Guide rail, 13. Fixed pulley, 14. Winch, 141. Steel wire rope, 15. Manual handle, 2. Drill pipe, 21. Chute, 22. First external spline, 23. Second external spline, 24. Second spiral blade, 3. Sampling bit, 31. Mounting seat, 311. Slide rail, 32. Left bit, 321. Left sampling cavity, 33. Right bit, 331. Right sampling cavity, 34. Left push rod, 35. Right push rod, 36. First spiral blade, 361. Left spiral blade, 362. Right spiral blade, 4. Driving part, 5. Driving pipe, 51. Guide seat, 52. Driving rod, 53. Third external spline, 6. Transmission part, 61. Spline shaft, 62. Transmission seat, 63. Transmission outer pipe, 631. First internal spline, 64. Transmission inner pipe, 641. Second internal spline, 642. Fourth external spline, 65. Bush, 66. Push cylinder, 7. Reaming part, 71. Reaming bit, 711. Slide seat, 712. First support arm, 713. Second support arm, 714. Teeth, 72. Main drive seat, 721. Third internal spline, 73. Sub-drive seat, 74. Slide bar, 75. Connecting pipe. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] Refer to Figures 1 to 5As shown in the figure, this embodiment provides a Gannan drill for soil sampling, which includes a frame 1, a drill pipe 2, a sampling drill bit 3 and a driving member 4. An installation platform 11 is vertically slidably arranged on the frame 1, and the drill pipe 2 is rotatably arranged on the installation platform 11. Specifically, when implemented, a plurality of guide rails 12 are vertically arranged on the frame 1, and the installation platform 11 is slidably connected to the plurality of guide rails 12. When the installation platform 11 slides on the plurality of guide rails 12, the drill pipe 2 is driven to move vertically. More specifically, a fixed pulley 13 is arranged at the top of the frame 1, and a winch 14 is also arranged on the frame 1. The winch 14 is located on the back side of the frame 1. The free end of the steel wire rope 141 wound around the drum of the winch 14 is wound around the fixed pulley 13 and then connected to the installation platform 11. Then, the winch 14 is used to control the lifting of the installation platform 11, that is, to control the lifting of the drill pipe 2, cooperate with the drill pipe 2 to drill and sample, and then withdraw from the soil layer after the subsequent drilling and sampling are completed.

[0040] As Figures 3 - 5 shown in the figure, a driving pipe 5 is coaxially and rotatably arranged in the drill pipe 2. A guide seat 51 is arranged in the drill pipe 2 below the driving pipe 5. A driving rod 52 is vertically slidably arranged on the guide seat 51. The driving rod 52 is spline-connected to the guide seat 51. A fifth external spline is arranged on the driving rod 52, and a fourth internal spline is arranged in the inner cavity of the guide seat 51. The upper end of the driving rod 52 extends into the driving pipe 5 and is in threaded cooperation with the driving pipe 5. Then, by driving the driving pipe 5 to rotate, while the driving pipe 5 rotates forward and backward, due to the cooperation between the fifth external spline on the driving rod 52 and the fourth internal spline on the guide seat 51, the driving rod 52 cannot rotate when the driving pipe 5 rotates. Thus, the threaded part on the driving rod 52 withdraws from or enters the driving pipe 5 to control the driving rod 52 to move down or up in the drill pipe 2.

[0041] More specifically, as Figures 3 - 5 shown in the figure, the sampling drill bit 3 is coaxially arranged at the lower end of the drill pipe 2. The sampling drill bit 3 includes an installation seat 31, a left drill bit 32 and a right drill bit 33 which are symmetrically arranged. The upper end of the installation seat 31 is connected to the lower end of the drill pipe 2. A slide rail 311 is arranged on the installation seat 31. The upper ends of the left drill bit 32 and the right drill bit 33 are slidably arranged on the slide rail 311. The lower end of the driving rod 52 is hinged with a left push rod 34 and a right push rod 35. One end of the left push rod 34 away from the driving rod 52 is hinged with the left drill bit 32, and one end of the right push rod 35 away from the driving rod 52 is hinged with the right drill bit 33. A left sampling cavity 321 is arranged on one side of the left drill bit 32 close to the right drill bit 33, and a right sampling cavity 331 is arranged on one side of the right drill bit 33 close to the left drill bit 32. When the left drill bit 32 and the right drill bit 33 are clamped and butted, the left sampling cavity 321 and the right sampling cavity 331 are butted to form a sampling cavity for containing samples. The driving member 4 is arranged on the installation platform 11, and the driving member 4 drives the drill pipe 2 and the driving pipe 5 to rotate respectively through a transmission member 6.

[0042] Specifically, when implemented, as Figure 3As shown, a semi-closed tube can be installed in the sampling cavity, and two pipes with semicircular cross-sections of the semi-closed tube are respectively installed in the left sampling cavity 321 and the right sampling cavity 331. When the drill pipe 2 with the sampling drill bit 3 drills to the target depth, the driving tube 5 in the drill pipe 2 is driven to rotate, thereby controlling the driving rod 52 to move downward. The driving rod 52 separates the left drill bit 32 and the right drill bit 33 that were originally embraced together through the left push rod 34 and the right push rod 35. Finally, the drill pipe 2 continues to rotate downward and drill, and the soil sample immediately enters between the left drill bit 32 and the right drill bit 33. After drilling and sampling to a certain depth, the drilling depth during sampling is usually the height of the semi-closed tube. After drilling and sampling to this depth, the semi-closed tube is basically filled with soil samples, and then the driving member 4 drives the driving tube 5 to rotate in the opposite direction, thereby controlling the driving rod 52 to move upward, so that the left drill bit 32 and the right drill bit 33 are embraced and brought close to each other. Since there is a soil sample between the left drill bit 32 and the right drill bit 33, it is only necessary to control the left drill bit 32 and the right drill bit 33 to be brought close to each other until the soil sample does not fall off, and then the drill pipe 2 is pulled out by the winch 14, and then the left drill bit 32 and the right drill bit 33 are controlled to separate from each other, and the semi-closed tube is removed, or the soil sample can be directly picked out, and the collected samples are collected, packaged and labeled, and the sample collection is completed.

[0043] More specifically, Figures 1 - 5 As shown, it also includes a reaming member 7, which includes a plurality of reaming drill bits 71; the plurality of reaming drill bits 71 are arranged in an annular array about the drill pipe 2, and a plurality of slide grooves 21 are opened in an annular array on the drill pipe 2, and the slide groove 21 is parallel to the axis of the drill pipe 2, and the reaming drill bit 71 includes a slide seat 711, a first arm 712 and a second arm 713 distributed in sequence from top to bottom, the slide seat 711 is slidably arranged in the slide groove 21, one end of the first arm 712 is hinged to the slide seat 711, the other end of the first arm 712 is hinged to one end of the second arm 713, and the end of the second arm 713 away from the first arm 712 is hinged to the lower end of the slide groove 21; and then by driving the slide seat 711 to slide downward, the first arm 712 and the second arm 713 can be hinged to the lower end of the slide groove 21. The two arms 713 move outward at the hinged joint, and the first arm 712 and the second arm 713 gradually change from the original straight angle to an obtuse angle, so that the first arm 712 and the second arm 713 have a larger range of cutting and excavating soil during the rotation of the drill pipe 2. The first arm 712 and the second arm 713 are both provided with a plurality of teeth 714, and the teeth on the drill bit are collectively referred to as teeth 714. The teeth 714 here are cutting teeth or alloy teeth, which are mainly used to assist the first arm 712 and the second arm 713 to better cut and excavate the soil during rotation and hole expansion. After loosening the soil in the borehole, it can avoid generating a large resistance to the drilling or extraction of the drill pipe 2, which is more conducive to the drilling and extraction of the drill pipe 2.

[0044] More specifically, Figure 3 and Figure 5As shown, the reaming member 7 further includes a main drive seat 72, a secondary drive seat 73, and a plurality of sliding rods 74. The main drive seat 72 is coaxially disposed within the drill pipe 2 and is in threaded engagement with the drill pipe 2. The driving member 4 drives the main drive seat 72 to rotate through the transmission member 6. The secondary drive seat 73 is located below the main drive seat 72 and is slidably disposed within the drill pipe 2. A connecting pipe 75 is rotatably connected to the top of the secondary drive seat 73, and the upper end of the connecting pipe 75 is connected to the main drive seat 72. A plurality of sliding rods 74 are annularly arranged at the bottom of the secondary drive seat 73, and the lower ends of the plurality of sliding rods 74 are respectively connected to a plurality of sliding seats 711. During specific implementation, before drilling, the sampling drill bit 3 at the lower end of the drill pipe 2 is placed on the ground. At this time, the winch 14 does not act on the mounting platform 11. Under the action of gravity, the sampling drill bit 3 is in close contact with the ground. Subsequently, the main drive seat 72 is first driven to rotate within the drill pipe 2 by the driving member 4. Since the main drive seat 72 is in threaded engagement with the drill pipe 2, the main drive seat 72 moves downward while rotating within the drill pipe 2. The main drive seat 72 synchronously drives the secondary drive seat 73 to move downward through the connecting pipe 75. The secondary drive seat 73 then drives the plurality of sliding seats 711 to slide downward within the sliding grooves 21 through the plurality of sliding rods 74, thereby synchronously expanding the plurality of reaming drill bits 71 to facilitate subsequent reaming drilling.

[0045] As Figure 3 and Figure 4 shown, the transmission member 6 includes a spline shaft 61, a transmission seat 62, a transmission outer tube 63, and a transmission inner tube 64. The spline shaft 61 is rotatably disposed on the mounting platform 11, and the upper end of the spline shaft 61 is in transmission connection with the driving member 4. During specific implementation, the driving member 4 is a speed reducer, and the output end of the speed reducer can rotate in both forward and reverse directions. The spline shaft 61 is coaxially disposed with the driving tube 5 and is rotatably connected to each other. Thus, the drill pipe 2 can move up and down with the mounting platform 11 through the mutual connection between the spline shaft 61 and the driving tube 5.

[0046] The transmission seat 62 is vertically slidably disposed on the mounting platform 11. The transmission seat 62 is slidably sleeved on the spline shaft 61 and is in spline connection with the spline shaft 61. Thus, the transmission seat 62 can slide on the spline shaft 61 while being in continuous transmission connection with the spline shaft 61. A transmission outer tube 63 and a transmission inner tube 64 are coaxially disposed at the lower end of the transmission seat 62. The transmission inner tube 64 is located inside the transmission outer tube 63. The upper end of the drill pipe 2 extends between the transmission outer tube 63 and the transmission inner tube 64.

[0047] More specifically, first outer splines 22 and second outer splines 23 are spaced apart on the outside of the drill pipe 2. The first outer splines 22 are located above the second outer splines 23. First inner splines 631 are provided on the inside of the transmission outer tube 63. The first inner splines 631 are respectively engaged with the first outer splines 22 and the second outer splines 23 by driving the transmission seat 62 to move up and down on the mounting platform 11. When the first inner splines 631 are respectively engaged with the first outer splines 22 or the second outer splines 23, the driving member 4 can drive the drill pipe 2 to rotate.

[0048] On the outer wall of the transmission inner tube 64, a fourth external spline 642 is provided, and on the main drive seat 72, a third internal spline 721 is provided. When the third internal spline 721 cooperates with the fourth external spline 642, the first internal spline 631 does not cooperate with the first external spline 22 or the second external spline 23, and the second internal spline 641 does not cooperate with the third external spline 53. During specific implementation, when adjusting the reaming bit 71 before drilling, first control the transmission seat 62, the transmission outer tube 63, and the transmission inner tube 64 to move downward, so that the fourth external spline 642 on the transmission inner tube 64 meshes with the third internal spline 721 on the main drive seat 72. Then, drive the main drive seat 72 to rotate downward in the drill pipe 2 through the speed reducer. At the same time, several sliding seats 711 move downward, and then several first support arms 712 and second support arms 713 are adjusted from a flat angle to an obtuse angle state, which is convenient for subsequent reaming drilling.

[0049] The main drive seat 72 moves downward, and the inner drive tube 5 moves downward synchronously. Then, when the main drive seat 72 moves to the target position, the transmission inner tube 64 can be continuously controlled to move downward, so that the first internal spline 631 on the transmission outer tube 63 meshes with the second external spline 23, and the drill pipe 2 can be directly driven to rotate. Under the gravity drive of all items on the drill pipe 2 and the installation platform 11, the drill pipe 2 drills downward. When drilling to the target depth, the drill pipe 2 can be lifted upward by the winch 14 and then reset downward to the depth before lifting. Repeat this several times to loosen the soil at the sampling bit 3.

[0050] More specifically, such as Figures 3 - 5As shown, a third external spline 53 is provided on the driving pipe 5, and a second internal spline 641 is provided on the inner side of the transmission inner pipe 64. When the second internal spline 641 cooperates with the third external spline 53, the first internal spline 631 does not cooperate with the first external spline 22 or the second external spline 23. When the soil at the sampling drill bit 3 becomes loose, the driving transmission seat 62 moves upward, causing the second internal spline 641 on the transmission inner pipe 64 to engage with the third external spline 53 on the driving pipe 5. Then, at this time, the transmission member 6 alone drives the driving pipe 5 to rotate, and then the left drill bit 32 and the right drill bit 33 are separated from each other. It should be noted that when the soil at the sampling drill bit 3 is relatively dense and the resistance to lifting and lowering the drill pipe 2 is felt to be relatively large, the sampling drill bit 3 can be lifted to the reaming drill bit 71 and then the left drill bit 32 and the right drill bit 33 are deployed; after the left drill bit 32 and the right drill bit 33 are deployed, control the transmission seat 62 to continue moving upward, causing the second internal spline 641 to separate from the third external spline 53 and the first internal spline 631 to engage with the first external spline 22. At this time, the speed reducer alone drives the drill pipe 2 to rotate and continue to drill downward. At this time, the soil sample gradually enters the sampling cavity or the semi-closed pipe; after moving downward to the target depth, that is, after the sample is full or the height of one sampling cavity is moved down or the height of one semi-closed pipe is moved down, drive the transmission seat 62 to move downward, causing the second internal spline 641 to engage with the third external spline 53, and then reverse the speed reducer, causing the driving pipe 5 to rotate in the reverse direction. Finally, control the left drill bit 32 and the right drill bit 33 to clasp or clamp the target sample soil. Then, lift the entire installation platform 11 by the winch 14 to move the sampling drill bit 3 to the ground. Then, take out the sample soil, package it and make marks. After the left drill bit 32 and the right drill bit 33 are clasped and reset, the sampling operation can be carried out at the next sampling site.

[0051] More specifically, the height of the fourth external spline 642 is higher than the height of the first external spline 22, and the height of the third external spline 53 is lower than the height of the first external spline 22 and higher than the height of the second external spline 23. Thus, it is ensured that the first external spline 22, the second external spline 23, the third external spline 53, and the fourth external spline 642 can be respectively acted on, and each step does not interfere with each other. By the up and down movement of a transmission member 6, the rotation of the drill pipe 2, the deployment and closing of the sampling drill bit 3, and the deployment and closing of the reaming drill bit 71 can be respectively controlled. While meeting various functions, the overall structure is greatly simplified, the system is stable and reliable, and it is convenient for outdoor sampling.

[0052] More specifically, as Figures 1 - 4As shown, the transmission member 6 further includes a bushing 65 and a plurality of push cylinders 66. The transmission seat 62 and the transmission outer tube 63 are rotatably arranged within the bushing 65. A plurality of push cylinders 66 are arranged in an annular array on the mounting platform 11. The push cylinders 66 are arranged vertically. The telescopic end of the push cylinder 66 passes through the mounting platform 11 and is connected to the bushing 65. The push cylinders 66 are usually electric push cylinders 66. Two sets are provided. Thus, the up and down movement of the transmission seat 62 on the mounting platform 11 is controlled by the two push cylinders 66. Cooperating with the speed reducer, functions such as controlling the rotation of the drill pipe 2, the opening and closing of the sampling bit 3, and the opening and closing of the reaming bit 71 are respectively realized.

[0053] More specifically, as Figures 1 - 5 shown, a first helical blade 36 is disposed around the sampling bit 3. The first helical blade 36 is composed of a left helical blade 361 and a right helical blade 362. The left helical blade 361 is fixedly arranged on the left drill bit 32, and the right helical blade 362 is fixedly arranged on the right drill bit 33. At the same time, a second helical blade 24 is disposed around the drill pipe 2. The first helical blade 36 and the second helical blade 24 contribute to the drilling and withdrawal of the drill pipe 2 and the sampling bit 3, and also contribute to dispersing the soil in the borehole.

[0054] As Figure 1 and 2 shown, manual handles 15 are provided on both the left and right sides of the mounting platform 11, mainly used to provide downward pressure manually when the drill pipe 2 drills downward, and to assist in lifting manually when the drill pipe 2 is taken out later. Counterweights and the like are also provided on both the left and right sides below the frame 1 to provide downward pressure and ensure the stability of the frame 1 to support the drilling of the drill pipe. Anchor rods are provided at the bottom of the frame 1, which can be inserted into the soil layer before drilling to prevent the frame 1 from shifting during drilling. Pulleys are also provided at the bottom of the frame 1, and a driving handle is provided at the top of the frame to facilitate the movement of the frame.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A Gannan drill for soil sampling, characterized in that: It includes a frame (1), a drill pipe (2), a sampling bit (3) and a driving member (4). An installation platform (11) is vertically slidably arranged on the frame (1), and the drill pipe (2) is rotatably arranged on the installation platform (11); A driving pipe (5) is coaxially and rotatably arranged in the drill pipe (2). A guide seat (51) is arranged in the drill pipe (2) below the driving pipe (5). A driving rod (52) is vertically slidably arranged on the guide seat (51). The driving rod (52) is spline-connected to the guide seat (51). The upper end of the driving rod (52) extends into the driving pipe (5) and is in threaded cooperation with the driving pipe (5). The sampling bit (3) is coaxially arranged at the lower end of the drill pipe (2). The sampling bit (3) includes a mounting seat (31), a left drill bit (32) and a right drill bit (33) which are symmetrically arranged. The upper end of the mounting seat (31) is connected to the lower end of the drill pipe (2). A slide rail (311) is arranged on the mounting seat (31). The left drill bit (32) and the right drill bit (33) are both slidably arranged on the slide rail (311). The lower end of the driving rod (52) is hinged with a left push rod (34) and a right push rod (35). The left push rod (34) is hinged with the left drill bit (32), and the right push rod (35) is hinged with the right drill bit (33); A left sampling cavity (321) is arranged on one side of the left drill bit (32) close to the right drill bit (33), and a right sampling cavity (331) is arranged on one side of the right drill bit (33) close to the left drill bit (32). The driving member (4) is arranged on the installation platform (11), and the driving member (4) drives the drill pipe (2) and the driving pipe (5) to rotate respectively through a transmission member (6).

2. The Gannan drill for soil sampling according to claim 1, characterized in that, It further includes a reaming member (7), and the reaming member (7) includes a plurality of reaming bits (71). A plurality of the reaming bits (71) are annularly arranged around the drill pipe (2). A plurality of sliding grooves (21) are annularly arranged on the drill pipe (2). The sliding grooves (21) are parallel to the axis of the drill pipe (2). The reaming bit (71) includes a sliding seat (711), a first arm (712) and a second arm (713) which are distributed from top to bottom in sequence. The sliding seat (711) is slidably arranged in the sliding groove (21). One end of the first arm (712) is hinged with the sliding seat (711), the other end of the first arm (712) is hinged with one end of the second arm (713), and the end of the second arm (713) far from the first arm (712) is hinged with the lower end of the sliding groove (21). A plurality of teeth (714) are arranged on both the first arm (712) and the second arm (713).

3. The Gannan drill for soil sampling according to claim 2, characterized in that, The reaming member (7) further includes a main driving seat (72), a sub-driving seat (73) and a plurality of sliding rods (74). The main driving seat (72) is coaxially arranged in the drill pipe (2) and is in threaded cooperation with the drill pipe (2); The driving member (4) drives the main driving seat (72) to rotate through the transmission member (6). The auxiliary drive seat (73) is located below the main drive seat (72) and is slidably arranged inside the drill pipe (2). A connecting pipe (75) is rotatably connected to the top of the auxiliary drive seat (73), and the upper end of the connecting pipe (75) is connected to the main drive seat (72). A plurality of sliding rods (74) are annularly arranged at the bottom of the auxiliary drive seat (73), and the lower ends of the plurality of sliding rods (74) are respectively connected to a plurality of sliding seats (711).

4. A Gannan drill for soil sampling according to claim 3, characterized in that, The transmission member (6) includes a spline shaft (61), a transmission seat (62), a transmission outer pipe (63) and a transmission inner pipe (64). The spline shaft (61) is rotatably arranged on the installation platform (11), and the upper end of the spline shaft (61) is in transmission connection with the driving member (4). The transmission seat (62) is slidably sleeved on the spline shaft (61) and is in spline connection with the spline shaft (61). A transmission outer pipe (63) and a transmission inner pipe (64) are coaxially arranged at the lower end of the transmission seat (62). The transmission inner pipe (64) is located inside the transmission outer pipe (63), and the upper end of the drill pipe (2) extends between the transmission outer pipe (63) and the transmission inner pipe (64). A first external spline (22) and a second external spline (23) are spaced apart on the outer side of the drill pipe (2). The first external spline (22) is located above the second external spline (23). A first internal spline (631) is arranged on the inner side of the transmission outer pipe (63). By driving the transmission seat (62) to move up and down on the installation platform (11), the first internal spline (631) is respectively engaged with the first external spline (22) and the second external spline (23). A third external spline (53) is arranged on the driving pipe (5). A second internal spline (641) is arranged on the inner side of the transmission inner pipe (64). When the second internal spline (641) is engaged with the third external spline (53), the first internal spline (631) is not engaged with the first external spline (22) or the second external spline (23).

5. A Gannan drill for soil sampling according to claim 4, characterized in that, A fourth external spline (642) is arranged on the outer wall of the transmission inner pipe (64). A third internal spline (721) is arranged on the main drive seat (72). When the third internal spline (721) is engaged with the fourth external spline (642), the first internal spline (631) is not engaged with the first external spline (22) or the second external spline (23), and the second internal spline (641) is not engaged with the third external spline (53).

6. The Gannan drill for soil sampling according to claim 5, characterized in that, The height of the fourth external spline (642) is higher than the height of the first external spline (22). The height of the third external spline (53) is lower than the height of the first external spline (22) and higher than the height of the second external spline (23).

7. The Gannan drill for soil sampling according to claim 6, characterized in that, The driving member (4) is a speed reducer. The spline shaft (61) is coaxially arranged with the driving pipe (5) and is rotatably connected to each other.

8. The Gannan drill for soil sampling according to claim 7, characterized in that, The transmission member (6) further includes a bushing (65) and a plurality of push cylinders (66). The transmission seat (62) and the transmission outer pipe (63) are rotatably arranged inside the bushing (65). A plurality of the push cylinders (66) are arranged in an annular array on the mounting platform (11), the push cylinders (66) are arranged vertically, and the telescopic ends of the push cylinders (66) pass through the mounting platform (11) and are connected to the bushing (65).

9. The Gannan drill for soil sampling according to claim 8, wherein, A first helical blade (36) is arranged around the sampling drill bit (3), the first helical blade (36) is composed of a left helical blade (361) and a right helical blade (362), the left helical blade (361) is fixedly arranged on the left drill bit (32), and the right helical blade (362) is fixedly arranged on the right drill bit (33); A second helical blade (24) is arranged around the drill pipe (2).

10. A Gannan drill for soil sampling according to claim 9, characterized in that, A plurality of guide rails (12) are arranged vertically on the frame (1), and the mounting platform (11) is slidably connected to the plurality of guide rails (12); A fixed pulley (13) is arranged at the top of the frame (1), a winch (14) is further arranged on the frame (1), and the free end of the steel wire rope (141) on the winch (14) is wound around the fixed pulley (13) and then connected to the mounting platform (11).

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