Sampler for exploration of geothermal well drilling

Abstract

The invention discloses a sampler for exploration of geothermal well drilling, and relates to the technical field of test sampling, the sampler comprises a sampling head, a material seat is mounted in the sampling head, a plurality of core cylinders are mounted at the top end of the material seat at equal angles in the circumferential direction, a base is rotatably mounted at the bottom end of the material seat, and through holes are formed in the positions, corresponding to the core cylinders, of the bottom end of the base; according to the invention, dynamic sampling, automatic split charging of materials and layered sampling of sample materials can be realized, the flexibility and high efficiency of sample material collection work are greatly improved, the collection work of the sample materials is more diversified, the collected sample materials are more representative, and the sampling efficiency of the sample materials is improved. According to the sampling device, the timeliness and effectiveness of sample material packaging work can be effectively improved, the sampler is endowed with the layered sampling capacity, the poor influence of sample materials with different layer depths is effectively avoided, external pollution can be effectively avoided, the storage reliability of the sample materials is greatly improved, and the effectiveness of the sample materials is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of test sampling, and specifically to a sampler for geothermal drilling exploration. Background Art

[0002] Geothermal drilling is used for drilling geothermal steam and geothermal water. It is an important special technology and an essential means for exploring and extracting geothermal fluids. The technological development of geothermal drilling samplers focuses on automated drive, precise regulation, and environmental adaptability. Through modular design and protective technology innovation, it meets the high-efficiency sampling requirements under high-temperature and high-pressure conditions. The Chinese patent discloses a sampler for geological exploration, with the application number: CN202122247777.6. This sampler is convenient to operate and can sample soils at different depths. However, the current samplers do not have the ability of continuous encapsulation sampling. During the exploration sampling process, it is necessary to frequently load and unload the sampling head and discharge materials. The sampling process is cumbersome and inefficient. At the same time, it is difficult to complete the real-time encapsulation of the sample materials. The sample materials are easily contaminated and interacted externally, resulting in the lack of representativeness of the sample materials, easy generation of invalid sampling. At the same time, the transportation work of the sample materials is not convenient and stable enough, and it is easy to cause adverse effects on the external environment due to the discrete scattering of the materials, resulting in poor environmental protection of the sampling work. Summary of the Invention

[0003] The present invention provides a sampler for geothermal drilling exploration, which can effectively solve the problems of the current samplers in the market, such as the lack of continuous encapsulation sampling ability, the need to frequently load and unload the sampling head and discharge materials during the exploration sampling process, the cumbersome and inefficient sampling process, the difficulty in completing the real-time encapsulation of the sample materials, the easy contamination and interaction of the sample materials externally, resulting in the lack of representativeness of the sample materials, easy generation of invalid sampling, and the inconvenient and unstable transportation work of the sample materials, which is easy to cause adverse effects on the external environment due to the discrete scattering of the materials, resulting in poor environmental protection of the sampling work.

[0004] To achieve the above object, the present invention provides the following technical solution: A sampler for geothermal drilling exploration, including a sampling head, and a dynamic acquisition mechanism is installed inside the sampling head; The dynamic acquisition mechanism includes a material seat; A material seat is installed inside the sampling head. A plurality of core cylinders are installed at equal angles along the circumferential direction at the top end of the material seat. A base is rotatably installed at the bottom end of the material seat. Through openings are provided at the positions corresponding to the core cylinders at the bottom end of the base. A plug plate is installed on one side of the inner curved surface of the base. A ring cover is installed at the position inside the plug plate at the bottom end of the material seat. A partition plate is installed at the middle of the bottom end of the ring cover. Side holes are provided at the positions on both sides of the partition plate on the outer curved surface of the ring cover. One side of the top end of the ring cover is provided with a conduit, the top end of the conduit is provided with a round box, a round plug is rotatably installed inside the round box, a connecting rod is installed in the middle of the bottom end of the round plug, a notch is formed on one side of the outer surface of the round plug, a short pipe is installed on the outer surface of the round box corresponding to the position of the core cylinder, and a top plug is slidably installed inside the core cylinder.

[0005] Preferably, a sampling cylinder is installed at the top end of the sampling head, a cover cylinder is installed at the top end of the sampling cylinder, a connector is installed in the middle of the top end of the cover cylinder, an overflow pipe is installed on the other side of the top end of the round box, a ring seat is installed at the top end of the core cylinder, an arc plug is slidably installed inside the ring seat, a ring rod is installed at the end of the arc plug, a plug rod is installed at the end of the ring rod, and a rotating ring is installed at the end of the plug rod; A plurality of column cylinders are installed at equal angles along the circumferential direction at the edge of the bottom end of the cover cylinder, a push cylinder is installed in the middle of the bottom end of the cover cylinder, a vertical pipe is embedded and installed in the middle of the top end of the push cylinder, a push plate is slidably installed inside the push cylinder, a guide hole is formed at the position corresponding to the column cylinder on the top of the outer wall of the push cylinder, a plug pipe is installed in the middle of the top end of the top plug, and a nail plate is slidably installed at the position at the bottom of the top plug inside the core cylinder.

[0006] Preferably, the chamber formed by the inner wall of the base and the outer wall of the ring cover fits with the plug plate, the volume of the chamber formed by the inner wall of the base and the outer wall of the ring cover is six times the maximum volume of the space at the top of the inner cavity of the core cylinder where the top plug is located, the inner cavity of the core cylinder at the top of the top plug is filled with hydraulic fluid, and the chamber formed by the inner wall of the base and the outer wall of the ring cover is filled with hydraulic fluid.

[0007] Preferably, both the round box and the material seat are hermetically and rotatably connected to the connecting rod, the end of the connecting rod is fixedly connected to the base, the notch and the through hole are on the same axis, the space at the top of the inner cavity of the core cylinder where the top plug is located is communicated with the round box through the short pipe, a replenishing valve is installed in the middle of the top end of the round box, and a material port is formed at the position corresponding to the core cylinder at the bottom end of the sampling head.

[0008] Preferably, the chamber in the ring cover that is in communication with the overflow pipe is communicated with the space on one side of the arc plug inside the ring seat through the overflow pipe, the space on one side of the arc plug inside the ring seat is filled with air, the end face area of the arc plug is equal to twice the end face area of the plug plate, the rotating ring is hermetically and rotatably connected to the ring seat, and a plurality of scale lines are arranged at equal angles along the circumferential direction at the position above the rotating ring on the outer surface of the sampling cylinder.

[0009] Preferably, a valve tube is installed at the top end of the vertical tube. The push cylinder is communicated with the column cylinder through a guide hole. Hydraulic fluid is filled at the position above the push plate inside the push cylinder. The space at the bottom of the push plate inside the push cylinder is conducted with the valve tube through the vertical tube. The space between the nail plate and the top plug inside the core cylinder is communicated with the column cylinder through an insertion tube. The maximum volume of the space at the bottom of the nail plate inside the core cylinder is less than the volume of the column cylinder. The volume of the column cylinder is less than one-sixth of the volume of the push cylinder.

[0010] Preferably, a mobile carriage is arranged at the bottom of the sampling head, and a limit correction mechanism is installed at the top end of the mobile carriage; The limit correction mechanism includes a cylinder block; The cylinder blocks are symmetrically installed on both sides of the top end of the mobile carriage. A vertical rod is embedded and slidably installed at the top end of the cylinder block. A sliding piston is installed at the bottom end of the vertical rod. A frame is installed at the top end of the vertical rod. A screw rod is embedded and rotatably installed on one side of the side end face of the frame. A sliding seat is installed on the outer side of the screw rod through a thread. Cylinders are embedded and installed at the corners of the top end of the sliding seat. A sliding rod is embedded and slidably installed at the bottom end of the cylinder. A ring frame is installed at the bottom end of the sliding rod. A sliding plate is installed at the top end of the sliding rod; A diversion seat is installed at the top end of the cylinder. A guide air pipe is installed in the middle of one side end face of the diversion seat. A diversion ring is embedded and installed on the inner wall of the sliding seat. A plurality of air bag pads are installed at equal angles along the circumferential direction on the inner wall of the diversion ring. A corrugated pipe is installed in the middle of the other side end face of the diversion seat. Air holes are opened in the middle of the bottom ends of the vertical rod and the sliding piston. A bottom pipe is embedded and installed at the edge of the top end of the mobile carriage; A square box is embedded and installed on one side of the top end of the mobile carriage. A limit plate is slidably installed inside the square box. A push rod is installed in the middle of the bottom end of the limit plate. A resistance plate is installed at the bottom end of the push rod. An air valve is installed at the top of one side end face of the square box. A communicating pipe is installed at the end of the air valve. A supplementary valve is embedded and installed at the bottom of the other side end face of the square box.

[0011] Preferably, the space at the bottom of the sliding piston inside the cylinder block is communicated with the corrugated pipe through the air hole. The inner cavity of the air bag pad is directly conducted with the diversion ring, and the inner cavity of the diversion ring is communicated with the diversion seat through the guide air pipe. The space at the top of the limit plate inside the square box is communicated with the space at the bottom of the sliding piston inside the cylinder block through the air valve and the communicating pipe. Both ends of the bottom pipe are communicated with the spaces at the bottom of the sliding pistons inside the two cylinder blocks.

[0012] Preferably, a positioning port is opened on the other side of the bottom end of the mobile carriage. The inner diameter of the positioning port is larger than the outer diameter of the sampling head. The outer diameter of the sampling head is larger than the inner diameter of the ring frame.

[0013] Preferably, an air pump is installed on one side of the top of the frame. A filter head is installed at the air inlet end of the air pump, and the air outlet end of the air pump is communicated with the space inside the cylinder body located at the bottom of the sliding piston through air holes. The input end of the air pump is electrically connected to the output end of an external power supply. A pressure gauge is embedded and installed on one side of the outer surface of the flow guide ring, and a valve body is installed on one side of the top of the flow guide seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The structure of the present invention is scientific and reasonable, and it is safe and convenient to use; 1. A dynamic acquisition mechanism is provided. Through the cooperation of the material seat, the core cylinder and the base, a continuous storage structure can be formed, which can effectively improve the acquisition fluency and storage convenience of the sample material. With the dynamic adjustment function of the through port, the plug board, the ring cover and the partition board, as well as the flow limiting and guiding functions of the side hole, the conduit, the round box, the round plug, the connecting rod, the notch, the short pipe and the top plug, dynamic sampling can be realized, and automatic packaging of the material can be achieved. On the one hand, it can realize stratified sampling of the sample material, greatly improve the flexibility and efficiency of the sample material acquisition work, make the acquisition work of the sample material more diversified, make the collected sample material more representative, and at the same time, it can realize the acquisition and extraction of the sample material with a deeper layer depth during a single sample material acquisition work, effectively improve the range of the sample material that can be collected at one time, effectively reduce the total acquisition frequency required for the sample, effectively avoid the trouble of frequent loading and unloading of the sampling head and frequent discharging during the sampling process, and effectively improve the acquisition efficiency; On the other hand, it can realize the efficient packaging of the material, automatically complete the sample packaging after the sample material is collected, effectively improve the timeliness and effectiveness of the sample material packaging work, further improve the stability and reliability of the packaging and acquisition work, endow the sampler with the ability of stratified sampling, realize relatively independent continuous packaging and sampling during a single acquisition work, effectively avoid the interactive influence of the sample materials with different layer depths, and can effectively avoid external pollution, greatly improve the preservation reliability of the sample material, and improve the effectiveness of the sample material. Through the cooperation of the overflow pipe, the ring seat, the arc plug, the ring rod, the insertion rod and the rotating ring, on the one hand, it can effectively ensure the connection stability and stable fluency of the sample acquisition work, and on the other hand, it can cooperate with the column cylinder, the push cylinder, the vertical pipe, the push plate, the guide hole, the insertion pipe and the nail plate to realize the dynamic compaction of the sample material after the sample material is collected, and can realize the rapid discharge of the sample material, and can greatly reduce the spilling probability during the transportation of the sample material, effectively improve the convenience and reliability of the sample material transportation work.

[0015] 2. A limited position correction mechanism is set up. Through the cooperation of the cylinder block, vertical rod, sliding piston, frame, screw rod and sliding seat, a dynamic position adjustment structure can be formed to achieve rapid adjustment of the orientation of the sampler and multiple comprehensive position adjustments of the sampler. On the one hand, it can quickly correct the orientation of the sampling head before the sample collection work, effectively reducing the difficulty of the position correction and adjustment work of the sampler, making the position adjustment work more labor-saving. While improving the convenience of the sampler position correction work, it can effectively improve the alignment accuracy of the sampling head, not only effectively improving the efficiency and effectiveness of the alignment work, enabling the external drill to be more efficiently and stably docked with the sampler, making the loading and connection work of the sampler more stable and reliable, but also making the sampler more compatible with the drilling, providing more stable and reliable preconditions for the sampling work, and further ensuring the accuracy and effectiveness of the sampling work; On the other hand, it can cooperate with the cylinder, sliding rod, ring frame, sliding plate, diversion seat, air duct, diversion ring and airbag pad to achieve automatic limiting of the sampler, convert gravity into limiting clamping force, greatly improve the timeliness, effectiveness and gentleness of the limiting work, and can effectively resist external impacts. This not only further improves the stability and safety of the sampler loading work, but also provides a stable driving force for the compaction and discharging work of the sample material, making the discharging and transfer work of the sample material more efficient and reliable. At the same time, it can effectively reduce the energy consumption during the material transfer work. Coupled with the connection and diversion work of the bellows, air holes and bottom pipe, the entire sampler loading work and discharging and transfer work can be made more smooth and efficient. Through the cooperation of the square box, limiting plate, push rod, resistance plate, air valve, connecting pipe and replenishing valve, efficient limiting of the moving vehicle frame can be achieved, converting gravity into its limiting resistance, further improving the smoothness of the sampler alignment work and enabling the sampling work to proceed more smoothly.

[0016] In summary, this sampler can achieve continuous sub-packaging sampling during the sampling process and can achieve real-time dynamic packaging of the sample material, enabling the sampler to have relatively independent layered sampling capabilities, effectively reducing the complexity of the sampling work, and effectively ensuring the representativeness and effectiveness of the extracted samples, making the sample collection work more efficient and reliable. At the same time, it can achieve rapid correction and timely limiting of the sampler orientation, making the entire sample material collection work more smooth and efficient, and greatly improving the efficiency of the sample material collection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2It is a schematic diagram of the sampling head installation structure of the present invention; Figure 3 It is a schematic diagram of the dynamic acquisition mechanism structure of the present invention; Figure 4 It is a partial explosion diagram of the present invention; Figure 5 It is a schematic diagram of the connecting rod installation structure of the present invention; Figure 6 It is a schematic diagram of the column cylinder installation structure of the present invention; Figure 7 It is a schematic diagram of the limit correction mechanism structure of the present invention; Figure 8 It is a schematic diagram of the airbag pad installation structure of the present invention; Reference numerals in the figure: 1, sampling head; 10, material inlet; 11, sampling cylinder; 12, cover cylinder; 13, joint; 14, mobile carriage; 200, dynamic acquisition mechanism; 201, material seat; 202, core cylinder; 203, base; 204, through port; 205, plug plate; 206, ring cover; 207, partition; 208, side hole; 209, conduit; 210, round box; 211, round plug; 212, connecting rod; 213, notch; 214, short tube; 215, top plug; 216, overflow pipe; 217, ring seat; 218, arc plug; 219, ring rod; 220, inserting rod; 221, swivel; 222, column cylinder; 223, push cylinder; 224, vertical tube; 225, push plate; 226, guide hole; 227, inserting tube; 228, nail plate; 20, valve tube; 21, feeding valve; 22, scale line; 300, limit correction mechanism; 301, cylinder block; 302, vertical rod; 303, sliding piston; 304, frame; 305, screw; 306, sliding seat; 307, air cylinder; 308, sliding rod; 309, ring frame; 310, sliding plate; 311, diversion seat; 312, air duct; 313, diversion ring; 314, airbag pad; 315, bellows; 316, air hole; 317, bottom tube; 318, square box; 319, limit plate; 320, push rod; 321, resistance plate; 322, air valve; 323, connecting pipe; 324, supplementary valve; 30, alignment port; 31, air pump; 32, filter head; 33, pressure gauge; 34, valve body. Specific embodiments

[0019] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0020] Example: As Figure 1-8As shown, the present invention provides a technical solution, a sampler for geothermal drilling exploration, including a sampling head 1, and a dynamic collection mechanism 200 is installed inside the sampling head 1; The dynamic collection mechanism 200 includes a material seat 201; A material seat 201 is installed inside the sampling head 1. A plurality of core barrels 202 are installed at equal angles along the circumferential direction at the top end of the material seat 201. A base 203 is rotatably installed at the bottom end of the material seat 201. Through openings 204 are formed at the positions corresponding to the core barrels 202 at the bottom end of the base 203. A plug plate 205 is installed on one side of the inner curved surface of the base 203. An annular cover 206 is installed at the position inside the plug plate 205 at the bottom end of the material seat 201. A partition plate 207 is installed at the middle of the bottom end of the annular cover 206. Side holes 208 are formed at the positions on both sides of the partition plate 207 on the outer curved surface of the annular cover 206; A conduit 209 is installed on one side of the top end of the annular cover 206. A round box 210 is installed at the top end of the conduit 209. A round plug 211 is rotatably installed inside the round box 210. A connecting rod 212 is installed at the middle of the bottom end of the round plug 211. A notch 213 is formed on one side of the outer curved surface of the round plug 211. A short tube 214 is installed on the outer curved surface of the round box 210 at the position corresponding to the core barrel 202. Both the round box 210 and the material seat 201 are hermetically and rotatably connected to the connecting rod 212. The end of the connecting rod 212 is fixedly connected to the base 203. The notch 213 and the through opening 204 are on the same axis. The space in the inner cavity of the core barrel 202 above the top plug 215 is communicated with the round box 210 through the short tube 214. A replenishing valve 21 is installed at the middle of the top end of the round box 210. A material opening 10 is formed at the position corresponding to the core barrel 202 at the bottom end of the sampling head 1 to achieve automatic limiting; A top plug 215 is slidably installed inside the core barrel 202. The chamber formed by the inner wall of the base 203 and the outer wall of the annular cover 206 fits with the plug plate 205. The volume of the chamber formed by the inner wall of the base 203 and the outer wall of the annular cover 206 is six times the maximum volume of the space in the inner cavity of the core barrel 202 above the top plug 215. The space in the inner cavity of the core barrel 202 above the top plug 215 is filled with hydraulic fluid. The chamber formed by the inner wall of the base 203 and the outer wall of the annular cover 206 is filled with hydraulic fluid to carry out the sub-packaging collection of sample materials; At the top of the sampling head 1, a sampling cylinder 11 is installed. At the top of the sampling cylinder 11, a cover cylinder 12 is installed. In the middle of the top of the cover cylinder 12, a connector 13 is installed. On the other side of the top of the round box 210, an overflow pipe 216 is installed. At the top of the core cylinder 202, a ring seat 217 is installed. Inside the ring seat 217, an arc plug 218 is slidably installed. At the end of the arc plug 218, a ring rod 219 is installed. At the end of the ring rod 219, a plug rod 220 is installed. At the end of the plug rod 220, a rotating ring 221 is installed. The chamber inside the ring cover 206 that is in communication with the overflow pipe 216 is connected to the space inside the ring seat 217 on the side of the arc plug 218 through the overflow pipe 216. The space inside the ring seat 217 on the side of the arc plug 218 is filled with air. The end face area of the arc plug 218 is equal to twice the end face area of the plug plate 205. The rotating ring 221 is in sealed rotational connection with the ring seat 217. On the outer curved surface of the sampling cylinder 11 at the position above the rotating ring 221, a number of scale lines 22 are equally angled along the circumferential direction for the transfer of sample materials. At the bottom edge of the cover cylinder 12, a number of column cylinders 222 are equally angled along the circumferential direction. In the middle of the bottom of the cover cylinder 12, a push cylinder 223 is installed. In the middle of the top of the push cylinder 223, a vertical pipe 224 is embedded and installed. Inside the push cylinder 223, a push plate 225 is slidably installed. At the top of the outer wall of the push cylinder 223 corresponding to the position of the column cylinder 222, a guide hole 226 is opened. In the middle of the top of the top plug 215, an insertion pipe 227 is installed. Inside the core cylinder 202, at the position below the top plug 215, a nail plate 228 is slidably installed. At the top of the vertical pipe 224, a valve pipe 20 is installed. The push cylinder 223 is connected to the column cylinder 222 through the guide hole 226. Inside the push cylinder 223, the space above the push plate 225 is filled with hydraulic fluid. The space inside the push cylinder 223 below the push plate 225 is in communication with the valve pipe 20 through the vertical pipe 224. The space inside the core cylinder 202 between the nail plate 228 and the top plug 215 is connected to the column cylinder 222 through the insertion pipe 227. The maximum volume of the space inside the core cylinder 202 below the nail plate 228 is less than the volume of the column cylinder 222. The volume of the column cylinder 222 is less than one-sixth of the volume of the push cylinder 223 for the compaction and unloading of sample materials.

[0021] At the bottom of the sampling head 1, a mobile carriage 14 is provided. At the top of the mobile carriage 14, a limit correction mechanism 300 is installed. The limit correction mechanism 300 includes a cylinder block 301. On both sides of the top of the movable frame 14, the cylinder blocks 301 are symmetrically installed. At the top of the cylinder block 301, the vertical rods 302 are embedded and slidably installed. At the bottom of the vertical rod 302, a sliding piston 303 is installed. At the top of the vertical rod 302, a frame 304 is installed. On one side of the side end face of the frame 304, a screw rod 305 is embedded and rotatably installed. On the outside of the screw rod 305, a sliding seat 306 is installed through threads. At the corner of the top of the sliding seat 306, a cylinder 307 is embedded and installed. At the bottom of the cylinder 307, a sliding rod 308 is embedded and slidably installed. At the bottom of the sliding rod 308, a ring frame 309 is installed. On the other side of the bottom of the movable frame 14, an alignment port 30 is opened. The inner diameter of the alignment port 30 is larger than the outer diameter of the sampling head 1, and the outer diameter of the sampling head 1 is larger than the inner diameter of the ring frame 309, so as to limit and correct the sampler body. At the top of the sliding rod 308, a sliding plate 310 is installed; At the top of the cylinder 307, a diversion seat 311 is installed. In the middle of one side end face of the diversion seat 311, an air guide pipe 312 is installed. Inside the inner wall of the sliding seat 306, a diversion ring 313 is embedded and installed. Along the circumferential direction of the inner wall of the diversion ring 313, a number of airbag pads 314 are installed at equal angles. In the middle of the other side end face of the diversion seat 311, a corrugated pipe 315 is installed. In the middle of the bottom of the vertical rod 302 and the sliding piston 303, air holes 316 are opened. On one side of the top of the frame 304, an air pump 31 is installed. At the air inlet end of the air pump 31, a filter head 32 is installed, and the air outlet end of the air pump 31 is communicated with the space inside the cylinder block 301 at the bottom of the sliding piston 303 through the air hole 316. The input end of the air pump 31 is electrically connected to the output end of the external power supply. On one side of the outer curved surface of the diversion ring 313, a pressure gauge 33 is embedded and installed. On one side of the top of the diversion seat 311, a valve body 34 is installed, so as to provide a stable initial driving force. At the edge of the top of the movable frame 14, a bottom pipe 317 is embedded and installed; On one side of the top of the movable frame 14, a square box 318 is embedded and installed. Inside the square box 318, a limiting plate 319 is slidably installed. In the middle of the bottom of the limiting plate 319, a push rod 320 is installed. At the bottom of the push rod 320, a resistance plate 321 is installed. On the top of one side end face of the square box 318, an air valve 322 is installed. At the end of the air valve 322, a connecting pipe 323 is installed. The space inside the cylinder block 301 at the bottom of the sliding piston 303 is communicated with the corrugated pipe 315 through the air hole 316. The inner cavity of the airbag pad 314 is directly communicated with the diversion ring 313, and the inner cavity of the diversion ring 313 is communicated with the diversion seat 311 through the air guide pipe 312. The space inside the square box 318 above the limiting plate 319 is communicated with the space inside the cylinder block 301 at the bottom of the sliding piston 303 through the air valve 322 and the connecting pipe 323. The two ends of the bottom pipe 317 are respectively communicated with the spaces inside the two cylinder blocks 301 at the bottom of the sliding piston 303, so as to perform gravity limitation. On the bottom of the other side end face of the square box 318, a supplementary valve 324 is embedded and installed.

[0022] Working principle and usage process of the present invention: When the sampler for exploration of local hot drilling is actually used, first, according to actual requirements, the size specifications of the sampler are selected and determined, and the sampling cylinder 11 is sent into the airbag pad 314. Then, the air pump 31 is started. After the external air is filtered by the filter head 32, it is sent into the connected cylinder 301 through the air hole 316, and under the connection of the bottom pipe 317, it synchronously enters another cylinder 301; At this time, the sliding piston 303 will lift the frame 304 upward through the vertical rod 302 under the push of air pressure, and the sliding seat 306 will also rise accordingly. At the same time, under the connection of the bellows 315, the air flow will synchronously flow into the diversion seat 311, and enter the diversion ring 313 through the air duct 312, and finally flow into each airbag pad 314, forcing the airbag pad 314 to expand correspondingly under the action of air pressure, squeezing the inner sampling cylinder 11. According to the indication of the pressure gauge 33, the air pressure is limited, so that the sampling cylinder 11 is locked by the airbag pad 314; Then, install the sampling head 1 at the bottom of the sampling cylinder 11, rotate the rotating ring 221, and drive the arc plug 218 to slide along the ring seat 217 through the inserting rod 220 and the ring rod 219. According to the scale line 22, align the arc plug 218 with the starting point of the scale line 22. In this state, inject hydraulic fluid into the inner part of the round box 210 through the feeding valve 21. Under the conduction of the short pipe 214, the hydraulic fluid will pass through the notch 213 and enter the space at the top of the top plug 215 inside each core cylinder 202. Under the conduction of the conduit 209, the hydraulic fluid will pass through the notch 213 and flow into the inner cavity of the ring cover 206 through the conduit 209, and then pass through the side hole 208 and enter the chamber surrounded by the base 203 and the ring cover 206 to supplement the hydraulic fluid to ensure the reliability during the sampling and encapsulation process; Then, inject hydraulic fluid into the cavity between the nail plate 228 and the top plug 215 inside the core cylinder 202 through the inserting pipe 227, and align the inserting pipe 227 with the column cylinder 222, insert the inserting pipe 227 into the column cylinder 222, and connect the cover cylinder 12 with the sampling cylinder 11 to complete the assembly and debugging of the sampler main body; During the above process, the gravity of the sampler main body will act on the sliding piston 303, forcing the sliding piston 303 to squeeze the air at the bottom, converting the gravity of the sampler main body into the internal pressure of the air flow. The air flow will finally flow into each airbag pad 314 under the action of the internal pressure, and be converted into the squeezing and locking force applied by the airbag pad 314 to the sampling cylinder 11, which can realize the synchronous limit of the sampler main body, ensure its stability during the assembly and debugging process, and preliminarily limit and correct its position; Subsequently, the mobile frame 14 is pushed so that the material inlet 10 is aligned with the wellhead of the drilling well to be explored and sampled. The air valve 322 is opened, and the airflow inside the cylinder block 301 will flow into the square box 318 through the connecting pipe 323, forcing the limiting plate 319 to push down the resistance plate 321 through the push rod 320 under the action of air pressure, so that the resistance plate 321 abuts against the bottom ground, limiting the position of the mobile frame 14. At this time, the sampling head 1 is directly above the wellhead of the drilling well to be explored and sampled. During this process, the sliding seat 306 can be displaced by rotating the screw rod 305 to further correct the position of the sampling head 1. Subsequently, the joint 13 is connected to an external drilling rig, and the sampling device main body is sent into the designated depth of the drilling well to be explored and sampled by the external drilling rig, and then normal sampling can be carried out; During the sampling process, the sample material passes through the material inlet 10 and enters the core barrel 202 opposite thereto through the through hole 204. The sample material will squeeze the nail plate 228, forcing the nail plate 228 to slide along the core barrel 202. During this process, the nail plate 228 will press the hydraulic fluid on its top, forcing the hydraulic fluid to flow into the cylinder 222 through the insertion tube 227. As the nail plate 228 continuously rises, after the nail plate 228 abuts against the top plug 215, it will push the top plug 215 to rise synchronously, and the top plug 215 will press the hydraulic fluid on its top into the round box 210 through the short tube 214; Subsequently, this part of the hydraulic fluid will pass through the notch 213 and flow into the inside of the ring cover 206 through the conduit 209, and then pass through the corresponding side hole 208 and enter the chamber surrounded by the ring cover 206 and the base 203, forcing the plug plate 205 to drag the base 203 to rotate around the ring cover 206 under the extrusion of the hydraulic fluid. Furthermore, under the extrusion of the plug plate 205, the hydraulic fluid on the other side of the plug plate 205 will pass through another side hole 208 and enter the chamber inside the ring cover 206 that is communicated with the overflow pipe 216, and then flow into the ring seat 217 through the overflow pipe 216, forcing the arc plug 218 to slide and deflect along the ring seat 217 under the push of the hydraulic pressure, overcoming the air pressure on the other side; It should be added here that: under the action of the air pressure on the other side of the arc plug 218, during the above process, since the hydraulic fluid between the top plug 215 and the nail plate 228 can overflow into the cylinder 222 through the insertion tube 227, the hydraulic fluid between the top plug 215 and the nail plate 228 cannot push the top plug 215 to displace. Under the linkage action of the connecting rod 212, during the rotation of the base 203, the round plug 211 will rotate synchronously; As the top plug 215 continuously rises, after all the hydraulic fluid located at the top of the top plug 215 inside the core barrel 202 is pressed out, that is, after the core barrel 202 is filled with the sample material, the through port 204 just deflects to the position of the second core barrel 202, and the notch 213 will also communicate with the short pipe 214 at the top of the second core barrel 202 along with the deflection of the round plug 211. Correspondingly, after the first core barrel 202 is filled with the sample material, its connection with the outside is cut off, and this part of the sample material is independently encapsulated to avoid external contamination. Subsequently, the sample material will enter the second core barrel 202, and the above process will be repeated for independent sub-packaging sampling; After completing the sample material collection work, the sampler main body is lifted out of the drill hole by an external drill, and the sampling head 1 is pressed against the ring frame 309, forcing the sliding rod 308 to drive the sliding plate 310 to slide along the cylinder 307 under the push of the ring frame 309. The air flow inside the cylinder 307 will flow into the diversion seat 311 under the extrusion of the sliding plate 310 and synchronously flow into the diversion ring 313 through the air duct 312, forcing the airbag pad 314 to press against the sampling cylinder 11 again to limit the sampler main body. At this time, the lifting force of the external drill on the sampler main body can be removed, and the gravity of the sampler main body will act on the gas at the bottom of the cylinder block 301, which is transformed into the locking force applied to the sampling cylinder 11 by the gas; Subsequently, using an external pipeline, the valve body 34 is connected to the valve pipe 20, the valve pipe 20 and the valve body 34 are opened, and the air flow will flow into the space located at the bottom of the push plate 225 inside the push cylinder 223 through the vertical pipe 224, forcing the push plate 225 to rise under the action of air pressure. The hydraulic fluid at its top will be pressed into the column cylinder 222 through the guide hole 226. Under the conduction of the insertion pipe 227, the hydraulic fluid will flow into the space between the top plug 215 and the nail plate 228 inside the core barrel 202, forcing the nail plate 228 to squeeze the sample material at the bottom, and then using air pressure to compact the sample material for the transfer of the sample material. During the actual operation process, dynamic adjustment can be carried out according to actual needs. When the air pressure is insufficient, the air pump 31 can also be started for air pressure compensation; The above process is only required when collecting solid sample materials. When collecting liquid sample materials, this sample material compaction step can be ignored. Subsequently, an external sample material storage device is placed at the bottom of the material port 10, and the rotating ring 221 is rotated. The rotating ring 221 will drag the arc plug 218 to slide and deflect along the ring seat 217 through the insertion rod 220 and the rotating ring 221. At this time, the arc plug 218 will squeeze the hydraulic fluid inside the ring seat 217, causing the hydraulic fluid to flow back into the chamber where the plug plate 205 is located, pushing the base 203 and the round plug 211 to deflect in the opposite direction, and making the arc plug 218 move forward one scale according to the indication of the scale line 22; At this time, the core barrel 202 that collects the last sample material will be in communication with the bottom port 204. Under the pressing of the nail plate 228, this part of the sample material will fall into the external sample material storage device through the material port 10. During this process, the short tube 214 at the top of the core barrel 202 will also be in communication with the notch 213. As the plug plate 205 rotates, the hydraulic fluid will be reversely pressed back into the space at the top of the top plug 215 inside the core barrel 202 to achieve automatic zero calibration; Subsequently, repeat the foregoing operations, use pneumatic drive to drive the nail plate 228, and transfer the sample materials inside each core barrel 202 into different external sample material storage devices in sequence, thereby completing a single sample material sampling operation, and then a new round of sample material collection work can be carried out through the foregoing steps.

[0023] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 sampler for geothermal drilling exploration, comprising a sampling head (1), characterized in that: Inside the sampling head (1), a dynamic acquisition mechanism (200) is installed; The dynamic acquisition mechanism (200) includes a material seat (201); Inside the sampling head (1), a material seat (201) is installed. Along the circumferential direction at equal angles, a number of core cylinders (202) are installed at the top of the material seat (201). At the bottom of the material seat (201), a base (203) is rotatably installed. At the position corresponding to the core cylinder (202) at the bottom of the base (203), a through hole (204) is provided. On one side of the inner curved surface of the base (203), a plug plate (205) is installed. At the inner side position of the plug plate (205) at the bottom of the material seat (201), an annular cover (206) is installed. In the middle of the bottom end of the annular cover (206), a partition plate (207) is installed. On both sides of the partition plate (207) at the outer curved surface of the annular cover (206), side holes (208) are provided; On one side of the top end of the annular cover (206), a conduit (209) is installed. At the top end of the conduit (209), a round box (210) is installed. Inside the round box (210), a round plug (211) is rotatably installed. In the middle of the bottom end of the round plug (211), a connecting rod (212) is installed. On one side of the outer curved surface of the round plug (211), a notch (213) is provided. At the position corresponding to the core cylinder (202) at the outer curved surface of the round box (210), a short pipe (214) is installed. Inside the core cylinder (202), a top plug (215) is slidably installed.

2. The sampling device for geothermal drilling exploration according to claim 1, wherein, At the top end of the sampling head (1), a sampling cylinder (11) is installed. At the top end of the sampling cylinder (11), a cover cylinder (12) is installed. In the middle of the top end of the cover cylinder (12), a joint (13) is installed. On the other side of the top end of the round box (210), an overflow pipe (216) is installed. At the top end of the core cylinder (202), an annular seat (217) is installed. Inside the annular seat (217), an arc plug (218) is slidably installed. At the end of the arc plug (218), an annular rod (219) is installed. At the end of the annular rod (219), a plug rod (220) is installed. At the end of the plug rod (220), a rotating ring (221) is installed; At the bottom edge of the cover cylinder (12) along the circumferential direction at equal angles, a number of column cylinders (222) are installed. In the middle of the bottom end of the cover cylinder (12), a push cylinder (223) is installed. In the middle of the top end of the push cylinder (223), a vertical pipe (224) is embedded and installed. Inside the push cylinder (223), a push plate (225) is slidably installed. At the top of the outer wall of the push cylinder (223) corresponding to the position of the column cylinder (222), a guide hole (226) is provided. In the middle of the top end of the top plug (215), a plug tube (227) is installed. Inside the core cylinder (202) at the bottom position of the top plug (215), a nail plate (228) is slidably installed.

3. The sampling device for geothermal drilling exploration according to claim 1, characterized in that, The chamber formed by the inner wall of the base (203) and the outer wall of the ring cover (206) fits the plug plate (205). The volume of the chamber formed by the inner wall of the base (203) and the outer wall of the ring cover (206) is six times the maximum volume of the space at the top of the inner cavity of the core cylinder (202) above the top plug (215). The inner cavity of the core cylinder (202) above the top plug (215) is filled with hydraulic fluid, and the chamber formed by the inner wall of the base (203) and the outer wall of the ring cover (206) is filled with hydraulic fluid.

4. The sampling device for geothermal drilling exploration according to claim 1, characterized in that, Both the round box (210) and the material seat (201) are sealingly and rotatably connected to the connecting rod (212). The end of the connecting rod (212) is fixedly connected to the base (203). The notch (213) and the through port (204) are on the same axis. The space at the top of the inner cavity of the core cylinder (202) above the top plug (215) is communicated with the round box (210) through a short pipe (214). A replenishing valve (21) is installed in the middle of the top end of the round box (210). A material port (10) is opened at the bottom end of the sampling head (1) corresponding to the position of the core cylinder (202).

5. The exploration sampler for geothermal drilling according to claim 2, characterized in that, The chamber inside the ring cover (206) that is in communication with the overflow pipe (216) is communicated with the space on one side of the arc plug (218) inside the ring seat (217) through the overflow pipe (216). The space on one side of the arc plug (218) inside the ring seat (217) is filled with air. The end face area of the arc plug (218) is twice the end face area of the plug plate (205). The rotating ring (221) is sealingly and rotatably connected to the ring seat (217). A number of scale lines (22) are equally angularly arranged along the circumferential direction at the position of the outer curved surface of the sampling cylinder (11) above the rotating ring (221).

6. The sampling device for geothermal drilling exploration according to claim 2, wherein A valve pipe (20) is installed at the top end of the vertical pipe (224). The push cylinder (223) is communicated with the column cylinder (222) through a guide hole (226). The inside of the push cylinder (223) above the push plate (225) is filled with hydraulic fluid. The space at the bottom of the push plate (225) inside the push cylinder (223) is communicated with the valve pipe (20) through the vertical pipe (224). The space between the nail plate (228) and the top plug (215) inside the core cylinder (202) is communicated with the column cylinder (222) through an insertion pipe (227). The maximum volume of the space at the bottom of the nail plate (228) inside the core cylinder (202) is less than the volume of the column cylinder (222). The volume of the column cylinder (222) is less than one-sixth of the volume of the push cylinder (223).

7. The sampling device for geothermal drilling exploration according to claim 1, characterized in that, A mobile vehicle frame (14) is provided at the bottom of the sampling head (1), and a limit correction mechanism (300) is installed at the top end of the mobile vehicle frame (14); The limit correction mechanism (300) includes a cylinder block (301); On both sides of the top of the mobile frame (14), cylinder blocks (301) are symmetrically installed. At the top of the cylinder block (301), a vertical rod (302) is embedded and slidably installed. At the bottom of the vertical rod (302), a sliding piston (303) is installed. At the top of the vertical rod (302), a frame (304) is installed. On one side of the side end face of the frame (304), a screw rod (305) is embedded and rotatably installed. On the outside of the screw rod (305), a sliding seat (306) is installed by means of threads. At the corners of the top of the sliding seat (306), a cylinder (307) is embedded and installed. At the bottom of the cylinder (307), a sliding rod (308) is embedded and slidably installed. At the bottom of the sliding rod (308), a ring frame (309) is installed. At the top of the sliding rod (308), a sliding plate (310) is installed; At the top of the cylinder (307), a flow guide seat (311) is installed. In the middle of one side end face of the flow guide seat (311), an air guide pipe (312) is installed. Inside the wall of the sliding seat (306), a flow guide ring (313) is embedded and installed. Along the circumferential direction at equal angles on the inner wall of the flow guide ring (313), a number of airbag pads (314) are installed. In the middle of the other side end face of the flow guide seat (311), a corrugated pipe (315) is installed. In the middle of the bottom of the vertical rod (302) and the sliding piston (303), air holes (316) are opened. At the edge of the top of the mobile frame (14), a bottom pipe (317) is embedded and installed; On one side of the top of the mobile frame (14), a square box (318) is embedded and installed. Inside the square box (318), a limiting plate (319) is slidably installed. In the middle of the bottom of the limiting plate (319), a push rod (320) is installed. At the bottom of the push rod (320), a resistance plate (321) is installed. At the top of one side end face of the square box (318), an air valve (322) is installed. At the end of the air valve (322), a connecting pipe (323) is installed. At the bottom of the other side end face of the square box (318), a supplementary valve (324) is embedded and installed.

8. The sampling device for geothermal drilling exploration according to claim 7, characterized in that, The space inside the cylinder block (301) at the bottom of the sliding piston (303) is communicated with the corrugated pipe (315) through the air hole (316). The inner cavity of the airbag pad (314) is directly communicated with the flow guide ring (313), and the inner cavity of the flow guide ring (313) is communicated with the flow guide seat (311) through the air guide pipe (312). The space inside the square box (318) at the top of the limiting plate (319) is communicated with the space inside the cylinder block (301) at the bottom of the sliding piston (303) through the air valve (322) and the connecting pipe (323). Both ends of the bottom pipe (317) are communicated with the spaces inside the two cylinder blocks (301) at the bottom of the sliding piston (303).

9. The sampling device for geothermal well drilling exploration according to claim 7, characterized in that, On the other side of the bottom of the mobile frame (14), an alignment port (30) is opened. The inner diameter of the alignment port (30) is larger than the outer diameter of the sampling head (1). The outer diameter of the sampling head (1) is larger than the inner diameter of the ring frame (309).

10. A sampler for geothermal drilling exploration according to claim 7, characterized in that, One side of the top of the frame (304) is provided with an air pump (31). The air inlet end of the air pump (31) is provided with a filter head (32), and the air outlet end of the air pump (31) is communicated with the space inside the cylinder block (301) at the bottom of the sliding piston (303) through an air hole (316). The input end of the air pump (31) is electrically connected to the output end of an external power supply. One side of the outer curved surface of the flow guide ring (313) is embedded with a pressure gauge (33). One side of the top of the flow guide seat (311) is provided with a valve body (34).

Images