A drilling sampling device for hydrogeological and environmental geological exploration

Abstract

The present invention relates to the technical field of geological exploration, and particularly relates to a drilling and sampling device for hydrogeological, engineering geological and environmental geological exploration, including a threaded rod. The upper end of the threaded rod is connected to an external driving device, and the lower end of the threaded rod is fixedly connected with a sampling mechanism. An outer shell is sleeved outside the sampling mechanism. A cavity is formed in the side wall of the outer shell. A plurality of telescopic mechanisms are arranged at equal intervals above the interior of the cavity. The lower end of each telescopic mechanism is connected with a gas cylinder. A through hole for the gas cylinder to pass through is formed in the bottom wall of the outer shell. The lower end of the gas cylinder is fixedly communicated with an air pipe. An outer air cushion is fixedly connected to the outside of the air pipe. An inner air cushion is fixedly installed on one side of the outer air cushion. On the one hand, this application can avoid the mixing and pollution of the sampled soil with the soil during the drilling process, improving the accuracy of detection. On the other hand, it can achieve the falling protection and deviation correction of the drill bit in two states of the middle core, facilitating reconnection.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and particularly relates to a drilling and sampling device for hydrogeological, engineering geological and environmental geological exploration. Background Art

[0002] When carrying out water conservancy construction, well drilling is often involved. Since well drilling is a project with a large workload, in order to ensure the efficiency of project construction, it is often necessary to drill and sample the underground soil layer structure in the well drilling area in advance, and then observe and analyze the collected soil samples to judge whether the preset area is suitable for well drilling.

[0003] In the process of drilling and sampling with existing devices, since pipes need to be frequently replaced or added, and there may be karst caves underground, it is very likely that the problem of drill dropping will occur during the replacement process. On the one hand, it is difficult for workers to take out the drill core for reconnection. On the other hand, after the drill drops, the sample is easily mixed with the soil at the bottom of the karst cave, causing sample contamination, so that it is necessary to re-sample, which is time-consuming and laborious, and greatly affects the progress of the sampling work. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems existing in the prior art, and to propose a drilling and sampling device for hydrogeological, engineering geological and environmental geological exploration.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A drilling and sampling device for hydrogeological, engineering geological and environmental geological exploration, including a threaded rod, the upper end of the threaded rod is connected to an external driving device, the lower end of the threaded rod is fixedly connected with a sampling mechanism, the outside of the sampling mechanism is sleeved with a housing, a cavity is opened in the side wall of the housing, a plurality of telescopic mechanisms are arranged at equal intervals above the cavity inside, the lower end of each telescopic mechanism is connected with a gas cylinder, a through hole for the gas cylinder to pass through is opened on the bottom wall of the housing, the lower end of the gas cylinder is fixedly communicated with an air pipe, an outer air cushion is fixedly connected to the outside of the air pipe, air outlet holes are opened on the air pipe, the air outlet holes are communicated with the inside of the outer air cushion, an inner air cushion is fixedly installed on one side of the outer air cushion, a one-way valve is installed between the outer air cushion and the inner air cushion, a drill dropping detection mechanism is arranged at the bottom end of the air pipe, and a plurality of straight grooves and a circle of receiving ring grooves are opened at equal intervals on the bottom of the housing, and the straight grooves are connected with the receiving ring grooves.

[0006] Preferably, the sampling mechanism is composed of a soil drilling part and a sampling part. The soil drilling part includes a secondary push rod fixedly connected to the lower end of the threaded rod, the output end of the secondary push rod faces downward and is fixedly connected with a first-level connecting ring, a plurality of connecting plates are fixedly connected at equal intervals to the lower end of the first-level connecting ring, a triangular drill is rotatably installed at the lower end of the connecting plate, an elastic band is commonly penetrated between the plurality of drills, and a heating component is arranged at the lower end of the drill.

[0007] Preferably, the heating component includes a heating block fixedly installed on the inner surface of the lower end of the drill bit.

[0008] Preferably, a knuckle is fixedly installed at the lower end of the connecting plate, a rotating shaft is rotatably installed between any two adjacent knuckles, and a shaft hole for the rotating shaft to pass through is provided inside the drill bit.

[0009] Preferably, the sampling part includes a secondary connecting ring slidably installed inside the primary connecting ring. The top end of the secondary connecting ring is fixedly connected to the output end of the secondary push rod. A sampling ring is fixedly installed at the middle position of the lower end of the secondary connecting ring, and a material box is fixedly installed at the outer periphery of the lower end. The material box is sleeved outside the sampling ring. A plastic film is stored inside the material box, and a feeding port is provided below the material box.

[0010] Preferably, the plastic film is arranged in a cylindrical shape, and the inside of the sampling ring is hollow.

[0011] Preferably, a plurality of magnetic plates are fixedly connected at equal intervals to the lower end of the primary connecting ring. The connecting plate and the magnetic plates are arranged at intervals. The N poles of the magnetic plates face outwards. A coil ring is sleeved outside the secondary push rod. The lower end of the coil ring is fixedly connected to a central ring. A plurality of capacitors are fixedly installed at equal intervals inside the central ring. The lower end of the central ring is fixedly connected to a copper shell. A plurality of installation slots are equally angled and opened on the side wall of the copper shell. A coil plate is fixedly installed in each installation slot. The number of coil plates is the same as the number of capacitors. Conductive copper wires are wound multiple times inside both the coil ring and the coil plates. The conductive copper wires inside the coil plates are wound clockwise.

[0012] Preferably, the telescopic mechanism includes springs fixedly connected to the inner top wall of the cavity. The lower ends of the plurality of springs are commonly fixedly connected to a pushing plate. A locking component is arranged below the pushing plate. A sliding block slidably installed inside the cavity is arranged below the locking component. There is damping between the sliding block and the inner wall of the cavity. The lower end of the sliding block is fixedly connected to a connecting rod, and the lower end of the connecting rod is fixedly connected to the gas cylinder.

[0013] Preferably, the locking component includes a plurality of stoppers arranged at equal intervals below the pushing plate. The stoppers are slidably connected inside the housing and are connected to a driving device installed inside the housing.

[0014] Preferably, the drill-dropping detection mechanism includes a chassis fixedly connected to the bottom end of the air pipe. Sensors are fixedly connected between any two adjacent chassis. A plurality of empty slots are equally spaced and opened at the bottom of the copper shell. The number and position of the straight slots correspond to those of the empty slots and they are connected.

[0015] Compared with the existing technology, the advantages of the present invention are:

[0016] In this application, during drilling, the outer wall of the drill bit is used to drill the soil, and for sampling, a sampling ring and a plastic film are used in combination for sampling and sealing. This can avoid the mixing and contamination of the sampled soil with the soil during the drilling process, and at the same time, it can also be promptly sealed to prevent the loss of some volatile substances due to exposure to the air after being taken out, which may affect the accuracy of the detection.

[0017] In this application, the settings of the coil ring, central ring, copper shell, coil plate, etc. After the drill bit drops, the coil plate will generate a corrective force on the intermediate core, causing the intermediate core to maintain a relatively central position during the falling process, which is convenient for subsequent reconnection. At the same time, during the process of the drill bit dropping, the magnetic flux will change, thereby slowing down the falling speed of the intermediate core and avoiding damage to the intermediate core.

[0018] In this application, through the settings of the connecting rod, gas cylinder, outer air cushion, inner air cushion, etc., it is possible to achieve the falling protection and deviation correction of the intermediate core when the drill bit drops in two states, while ensuring the purity of the internal soil sample and improving the test accuracy.

[0019] In summary, through the design of the above structure in this application, on the one hand, it can avoid the mixing and contamination of the sampled soil with the soil during the drilling process, improving the accuracy of the detection; on the other hand, it can achieve the falling protection and deviation correction of the intermediate core when the drill bit drops in two states, facilitating reconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a device for hydrogeological, environmental geological and engineering geological exploration drilling and sampling proposed by the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the outer air cushion and inner air cushion parts of a device for hydrogeological, environmental geological and engineering geological exploration drilling and sampling proposed by the present invention;

[0022] Figure 3 It is a half-sectional view of the housing part of a device for hydrogeological, environmental geological and engineering geological exploration drilling and sampling proposed by the present invention;

[0023] Figure 4 It is a half-sectional view of the coil ring, central ring and copper shell parts of the housing part of a device for hydrogeological, environmental geological and engineering geological exploration drilling and sampling proposed by the present invention;

[0024] Figure 5 It is Figure 4 The enlarged view of part A in

[0025] Figure 6 It is Figure 4 The enlarged view of part B in

[0026] Figure 7 It is Figure 4 The enlarged view of part C in

[0027] Figure 8 This is a schematic diagram of the air cushion and check valve parts in a drilling sampling device for hydrogeological, engineering geological and environmental geological exploration proposed by the present invention;

[0028] Figure 9 This is a schematic diagram of the air pipe and air outlet parts in a drilling sampling device for hydrogeological, engineering geological and environmental geological exploration proposed by the present invention;

[0029] Figure 10 This is a schematic diagram of the connecting plate and magnetic plate parts in a drilling sampling device for hydrogeological, engineering geological and environmental geological exploration proposed by the present invention;

[0030] Figure 11 This is a half-sectional view of the first-stage connecting ring part in a drilling sampling device for hydrogeological, engineering geological and environmental geological exploration proposed by the present invention;

[0031] Figure 12 is Figure 11 the enlarged view at D in

[0032] Figure 13 This is a half-sectional view of the drill bit and knuckle parts in a drilling sampling device for hydrogeological, engineering geological and environmental geological exploration proposed by the present invention.

[0033] In the figure: 1 housing, 11 spring, 111 push plate, 12 stopper, 13 coil ring, 14 central ring, 141 capacitor, 15 copper shell, 151 coil plate, 152 empty groove, 16 receiving ring groove, 161 straight groove, 2 connecting rod, 21 slider, 22 gas cylinder, 23 air pipe, 231 air outlet, 232 chassis, 233 sensor, 24 outer air cushion, 241 inner air cushion, 242 check valve, 3 secondary push rod, 31 threaded rod, 32 first-stage connecting ring, 321 connecting plate, 322 magnetic plate, 33 second-stage connecting ring, 331 sampling ring, 34 material box, 341 feeding port, 35 knuckle, 351 rotating shaft, 36 drill bit, 361 shaft hole, 362 elastic band, 363 heating block. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Refer to Figures 1 to 13, a drilling sampling device for water conservancy and environmental geological survey, comprising a threaded rod 31, the upper end of the threaded rod 31 is connected to an external driving device, the lower end of the threaded rod 31 is fixedly connected to a secondary push rod 3, the output end of the secondary push rod 3 faces downward and is fixedly connected to a primary connecting ring 32, the lower end of the primary connecting ring 32 is fixedly connected to a plurality of connecting plates 321 and a plurality of magnetic plates 322 at equal intervals, the connecting plates 321 and the magnetic plates 322 are arranged at intervals, the magnetic plates 322 are magnetic and the N pole faces outward, a steering knuckle 35 is fixedly installed at the lower end of the connecting plate 321, a rotating shaft 351 is rotatably installed between any two adjacent steering knuckles 35, a drill 36 is fixedly connected to the outer side of the rotating shaft 351, an axial hole 361 is opened inside the drill 36 for the rotating shaft 351 to pass through, the drill 36 is arranged in a triangular shape, and in the initial state, the lowermost ends of each drill 36 are tightly fitted (as shown in the attached manual Figure 10 As shown in FIG. 1 ), the drill bit 36 ​​can rotate between the two steering knuckles 35 following the rotating shaft 351, so that the multiple drill bits 36 can move away from or approach each other.

[0036] A secondary connecting ring 33 is slidably installed on the inner side of the primary connecting ring 32, and the top of the secondary connecting ring 33 is fixedly connected to the output end of the secondary push rod 3, and a sampling ring 331 is fixedly installed at the middle position of the lower end of the secondary connecting ring 33, and a material box 34 is fixedly installed at the outer periphery of the lower end. The material box 34 is sleeved on the outer side of the sampling ring 331, and a plastic film is stored inside the material box 34. The plastic film is cylindrical, similar to a garbage bag in daily life. A feeding port 341 is provided below the material box 34, and the plastic film is fed out through the feeding port 341. The interior of the sampling ring 331 is hollow, and in the initial state, the garbage bag is sleeved on the outer side of the sampling ring 331. When the secondary push rod 3 is running, the sampling ring 331 can be driven to move downward by driving the secondary connecting ring 33. After the sampling ring 331 moves downward and its lower end contacts the drill 36, the drill 36 can be rotated, thereby facilitating the sampling operation of the sampling ring 331.

[0037] An elastic band 362 is commonly passed through the multiple drill bits 36, and the multiple drill bits 36 can be tightly fitted together under the action of the elastic band 362. A heating block 363 is fixedly installed on the inner surface of the lower end of the drill bit 36, so that after the drill bit 36 ​​is stretched open by the sampling ring 331, the heating block 363 can be attached to the outer wall surface of the sampling ring 331 and directly contact the plastic film, thereby heating the plastic film, and the plastic film can be sealed after heating.

[0038] A coil ring 13 is sleeved outside the secondary push rod 3. A central ring 14 is fixedly connected to the lower end of the coil ring 13. A plurality of capacitors 141 are fixedly installed at equal intervals inside the central ring 14. A copper shell 15 is fixedly connected to the lower end of the central ring 14. A plurality of installation grooves are equiangularly formed on the side wall of the copper shell 15. A coil plate 151 is fixedly installed in each installation groove. The number of coil plates 151 is the same as the number of capacitors 141. And a conductive copper wire is wound inside the coil ring 13. A plurality of turns of conductive copper wire are wound clockwise inside the coil plate 151 (as Figure 3 shown in the direction), and the conductive copper wires inside both of them are not drawn in the accompanying drawings of the specification.

[0039] A shell 1 is fixedly connected to the outside of the coil ring 13. A cavity is formed in the side wall of the shell 1. A plurality of springs 11 are fixedly connected to the top wall of the cavity at equal intervals. A push plate 111 is fixedly connected to the lower ends of the plurality of springs 11. A plurality of stoppers 12 are arranged at equal intervals below the push plate 111. The stoppers 12 are slidably connected to the inside of the shell 1. The stoppers 12 are connected to a driving device installed inside the shell 1. The driving device is a prior art, and its specific structural design will not be elaborated here. A slider 21 slidably installed inside the cavity is arranged below the stopper 12. There is a damping between the slider 21 and the inner wall of the cavity. A connecting rod 2 is fixedly connected to the lower end of the slider 21. The lower end of the connecting rod 2 slidably penetrates through the bottom wall of the shell 1 and is fixedly connected to a gas cylinder 22. A trachea 23 is fixedly communicated with the lower end of the gas cylinder 22. An outer air cushion 24 is fixedly connected to the outside of the trachea 23. An air outlet hole 231 is formed in the trachea 23. The air outlet hole 231 is communicated with the inside of the outer air cushion 24. By providing the gas cylinder 22, the trachea 23 and the air outlet hole 231, the inside of the outer air cushion 24 can be inflated, so that it expands. An inner air cushion 241 is fixedly installed on one side of the outer air cushion 24. A one-way valve 242 is installed between the outer air cushion 24 and the inner air cushion 241. During the inflation process of the gas cylinder 22, part of the air flow will gradually enter the inner air cushion 241 through the one-way valve 242 until the inner air cushion 241 is completely expanded.

[0040] A plurality of empty grooves 152 are equidistantly formed at the bottom of the copper shell 15. A receiving ring groove 16 is formed at the bottom of the shell 1. A plurality of straight grooves 161 are also equidistantly formed at the bottom of the shell 1. The number and positions of the straight grooves 161 correspond to those of the empty grooves 152, and both the straight grooves 161 and the empty grooves 152 are connected to the receiving ring groove 16. The bottom end of the trachea 23 is fixedly connected to a chassis 232. A sensor 233 is fixedly connected between any two adjacent chassis 232. The sensor 233 is a prior art, and its specific structural design will not be elaborated here. The size of the receiving ring groove 16 is slightly larger than that of the sensor and the chassis 232, so that normally the chassis 232 and the sensor 233 can be received into the receiving ring groove 16, and the bottom is flush with the bottom of the external part.

[0041] The specific working principle of the present invention is as follows: the inner air cushion 241 and the one-way valve 242 are initially wrapped with a thin film and gathered on the outside of the air pipe 23, and inserted into the cavity in the outer shell 1. The user needs to first connect the power end (usually a drilling pump) to the threaded rod 31, and at the same time connect the outer shell 1 to a conventional outer sleeve, and simultaneously lower them into the well to be sampled. During the lowering process, the power end will drive the drill bit 36 ​​to drill through the threaded rod 31, and the excess soil will be discharged from the gap between the middle core body and the external part until it reaches the specified depth. At this time, the sampling operation can be carried out, and the secondary push rod 3 controls the primary connecting ring 32 to lift upward, and then drives the steering knuckle 35 and the drill bit 36 ​​to lift upward through the connecting plate 321. Due to the presence of the sampling ring 331, the drill bit 36 ​​will touch the sampling ring 331 during the lifting process and will be pushed open. The elastic band 362 inserted in the middle of the drill bit 36 ​​is stretched, so that after the drill bit 36 ​​is stretched open, the heating block 363 can fit on the outer wall surface of the sampling ring 331 and directly contact the plastic film. After that, the secondary connecting ring 33 pushes the sampling ring 331 downward and inserts it into the soil sample to be taken. Due to the presence of the plastic film, the soil sample will not touch the sampling ring 331, and will gradually be inserted into the plastic film during the descent of the sampling ring 331. When the specified depth is reached, The heat block 363 starts to heat and adheres the plastic film to the surface of the heating block 363. At this time, the primary connecting ring 32 starts to descend. Under the action of the elastic band 362, several drill bits 36 are closed again, and the output of the feeding port 341 is cooperated to make the plastic film completely wrap the soil sample to be tested. The heating block 363 continues to heat and the feeding port 341 continues to send out new plastic film. The plastic film gradually accumulates on the heating block 363 under the action of gravity and melts and condenses into one under the heating action of the heating block 363. At this time, the sealing work of the soil sample to be tested is completed, and drilling downwards can continue or sampling can be carried out in the next area. The advantage of this device is that the outer wall of the drill bit 36 ​​is used to drill the soil during drilling, and sampling is carried out through the sampling ring 331 and the plastic film in cooperation with the sampling seal, which can avoid the mixing of the sampled soil and the soil in the drilling process to contaminate the sample. At the same time, it can also be sealed in time to prevent some volatile substances from being lost due to exposure to the air after removal, affecting the detection accuracy.

[0042] During the drilling process, due to the complexity of the geological structure, hollow structures such as karst caves often appear. Encountering such structures during conventional drilling often leads to the dropping of the core in the middle (i.e., the problem of drill dropping). It is necessary to add a short pipe to the power end and reconnect it to the core. If a deeper karst cave is encountered, the core will be skewed and difficult to connect, or directly break away from the casing, resulting in the loss of the core. In response to this situation, the following improvements have been made to this solution: The inner wall of the outer shell 1 is provided with a coil ring 13, a central ring 14, a copper shell 15, and a coil plate 151. Conductive copper wires are wound inside the coil ring 13. A plurality of capacitors 141 are evenly distributed inside the central ring 14, and the number of capacitors 141 is the same as that of the coil plates 151 (the non-conductive material of the coil plates 151 will not affect the electromagnetic field passing through). A multi-turn conductive copper wire is wound clockwise inside the coil plate 151 (such as Figure 3In the direction shown, according to Ampere's rule, after the capacitor 141 is energized, a magnetic field with the N pole facing the direction of the middle core will be generated. At the same time, the magnetic plate 322 has magnetism and the N pole faces outward. The sensor 233 is an infrared sensor, which can detect the temperature at the bottom of the middle core through the straight groove 161 and the empty groove 152. During normal drilling, heat is generated by friction, and the heating block 363 will also be sensed during sampling. When the sensor 233 cannot sense the heat source, it indicates that the middle core has a problem of drill dropping. At this time, the central ring 14 will control the capacitor 141 to discharge, and the current will be introduced into the conductive copper wire in the coil plate 151. Since like poles of magnets repel each other, and the closer the distance, the greater the repulsive force generated. Therefore, after the drill drops, the coil plate 151 will generate a corrective force on the middle core, so that the middle core can maintain a relatively central position during the falling process, which is convenient for subsequent reconnection. After the drill drops, the sensor 233 will also send an electrical signal to the stopper 12 at the same time, causing the stopper 12 to retract. The elastic potential energy of the spring 11 is released, and then the push plate 111 is used to push the slider 21 to eject the entire ejection part from the cavity of the outer shell 1. Since the copper shell 15 is a copper ring-shaped tube and the coil plate 151 has magnetism, the magnetic flux will change during the process of drill dropping, which will slow down the falling speed of the middle core. The ejection part freely falls and is boosted by the push plate 111, and the downward acceleration is much higher than that of the middle core. Therefore, it will first fall to the designated position (until the slider 21 is stuck at the bottom of the cavity of the outer shell 1). During this process, the gas cylinder 22 inflates the outer air cushion 24 through the air outlet 231. There is a one-way valve 242 between the outer air cushion 24 and the inner air cushion 241. During the inflation process of the gas cylinder 22, the air flow will gradually enter the inner air cushion 241 through the one-way valve 242 until the inner air cushion 241 is fully expanded. During this period, the middle core will fall onto the inner air cushion 241. Since multiple outer air cushions 24 and multiple inner air cushions 241 together form a complete disc, if the drill drops during the drilling process, the tip formed by the drill bit 36 will insert into the cross-shaped gap formed in the middle of the inner air cushion 241, and will be further supported and corrected during the subsequent expansion process of the inner air cushion 241, ensuring that the middle core is located at the central axis position of the entire device. If the drill drops during the sampling process, the sampling ring 331 will be stuck in the annular groove above the outer air cushion 24 and the inner air cushion 241, and will seal the sampling ring 331 during the subsequent expansion process of the inner air cushion 241, preventing the loss of the sampled soil and the entry of soil into the sampling ring 331 when lifting the retrieval device, which may affect the sample quality. Also, due to the one-way passing property of the one-way valve 242, after the inner air cushion 241 blocks the sampling ring 331, there is no need to worry about air leakage and detachment, resulting in sample spillage. The presence of the slider 21 ensures that the ejection part will not completely separate from the external part, and further ensures that the middle core will not completely separate from the external part after the drill drops, which is convenient for subsequent recovery.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drilling sampling device for hydraulic geological survey, comprising a threaded rod (31), the upper end of which is connected to an external driving device, characterized in that: The lower end of the threaded rod (31) is fixedly connected to a sampling mechanism, an outer shell (1) is sleeved on the outer side of the sampling mechanism, a cavity is provided in the side wall of the outer shell (1), a plurality of telescopic mechanisms are arranged at equal intervals above the cavity, the lower end of each telescopic mechanism is connected to a gas cylinder (22), a through hole is provided on the bottom wall of the outer shell (1) for the gas cylinder (22) to pass through, the lower end of the gas cylinder (22) is fixedly connected to an air pipe (23), the outer side of the air pipe (23) is fixedly connected to an outer air cushion (24), and the air pipe (23) is fixedly connected to an outer air cushion (24). (23) is provided with an air outlet (231), the air outlet (231) is communicated with the interior of the outer air cushion (24), an inner air cushion (241) is fixedly mounted on one side of the outer air cushion (24), a one-way valve (242) is mounted between the outer air cushion (24) and the inner air cushion (241), a drill drop detection mechanism is arranged at the bottom end of the air pipe (23), a plurality of straight grooves (161) and a circle of receiving ring grooves (16) are arranged at equal intervals at the bottom of the outer shell (1), and the straight grooves (161) are connected to the receiving ring groove (16); The sampling mechanism is composed of a soil drilling part and a sampling part, wherein the soil drilling part comprises a secondary push rod (3) fixedly connected to the lower end of a threaded rod (31), the output end of the secondary push rod (3) faces downward and is fixedly connected to a primary connecting ring (32), the lower end of the primary connecting ring (32) is fixedly connected to a plurality of connecting plates (321) at equal intervals, a triangular drill (36) is rotatably mounted on the lower end of the connecting plate (321), an elastic band (362) is commonly inserted between the plurality of drills (36), and a heating component is arranged at the lower end of the drill (36); A steering knuckle (35) is fixedly mounted on the lower end of the connecting plate (321), a rotating shaft (351) is rotatably mounted between any two adjacent steering knuckles (35), and a shaft hole (361) for the rotating shaft (351) to pass through is formed inside the drill bit (36); The sampling portion comprises a secondary connecting ring (33) slidably mounted on the inner side of the primary connecting ring (32); the top end of the secondary connecting ring (33) is fixedly connected to the output end of the secondary push rod (3); a sampling ring (331) is fixedly mounted at the middle position of the lower end of the secondary connecting ring (33); a material box (34) is fixedly mounted at the outer periphery of the lower end; the material box (34) is sleeved on the outer side of the sampling ring (331); a plastic film is stored inside the material box (34); and a feeding port (341) is provided below the material box (34).

2. The drilling sampling device for water conservancy and environmental geological survey according to claim 1 is characterized in that: The heating assembly comprises a heating block (363) fixedly mounted on the inner surface of the lower end of the drill bit (36).

3. The drilling sampling device for water conservancy and environmental geological survey according to claim 1 is characterized in that: The plastic film is arranged in a cylindrical shape, and the interior of the sampling ring (331) is arranged in a hollow shape.

4. The drilling sampling device for water conservancy and environmental geological survey according to claim 1 is characterized in that: The lower end of the primary connecting ring (32) is fixedly connected to a plurality of magnetic plates (322) at equal intervals, the connecting plates (321) and the magnetic plates (322) are arranged at intervals, the N poles of the magnetic plates (322) face outwards, a coil ring (13) is sleeved on the outer side of the secondary push rod (3), the lower end of the coil ring (13) is fixedly connected to a central ring (14), a plurality of capacitors (141) are fixedly installed at equal intervals inside the central ring (14), the lower end of the central ring (14) is fixedly connected to a copper shell (15), a plurality of mounting grooves are formed at equal angles on the side wall of the copper shell (15), a coil plate (151) is fixedly installed in each mounting groove, the number of the coil plates (151) is the same as the number of the capacitors (141), and a plurality of turns of conductive copper wire are wound inside the coil ring (13) and the coil plate (151), the conductive copper wire inside the coil plate (151) is wound clockwise.

5. The drilling sampling device for water conservancy and environmental geological survey according to claim 1 is characterized in that: The telescopic mechanism comprises a spring (11) fixedly connected to the top wall of the cavity, the lower ends of the plurality of springs (11) being fixedly connected to a push plate (111), a locking assembly being arranged below the push plate (111), a slider (21) being slidably mounted inside the cavity being arranged below the locking assembly, damping being present between the slider (21) and the inner wall of the cavity, the lower end of the slider (21) being fixedly connected to a connecting rod (2), and the lower end of the connecting rod (2) being fixedly connected to a gas cylinder (22).

6. The drilling sampling device for water conservancy and environmental geological survey according to claim 5 is characterized in that: The locking assembly comprises a plurality of stoppers (12) arranged at equal intervals below the push plate (111); the stoppers (12) are slidably connected to the inside of the housing (1), and the stoppers (12) are connected to a driving device installed inside the housing (1).

7. The drilling sampling device for water conservancy and environmental geological survey according to claim 4 is characterized in that: The drill drop detection mechanism comprises a chassis (232) fixedly connected to the bottom end of the air pipe (23), a sensor (233) being fixedly connected between any two adjacent chassis (232), a plurality of empty slots (152) being evenly spaced at the bottom of the copper shell (15), the straight slots (161) corresponding in number and position to the empty slots (152), and the two being connected.

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