Hydrogeological drill type detection device

Abstract

The invention discloses a hydrogeological drill type detection device which comprises a support and a sampling device, and the sampling device is arranged in the middle of the support which can be lifted up and down. The sampling device further comprises a drill rod device and a sampling barrel, and the sampling barrel capable of completely taking out loose soil samples is arranged in the drill rod device capable of automatically cutting hard soil samples. The device has the functions that a novel inner cylinder structure is adopted, so that the situation that a soil sample cannot be taken out from an outer cylinder when the soil sample is too hard is prevented, and the sampling effect of the device on hard soil is improved; the sampling effect on loose soil is enhanced, and the soil layer structure is protected in the soil sample taking-out process; a new extraction mode is adopted, so that secondary disturbance to the soil sample is reduced, and the integrity and the purity of the soil sample are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogeology, and in particular relates to a hydrogeological drilling detection device. Background Art

[0002] Hydrogeology is a geological science that studies the distribution and formation of groundwater, the physical properties and chemical composition of groundwater, groundwater resources and their rational utilization, the adverse effects of groundwater on engineering construction and mining and their prevention and control, etc. In the process of hydrogeological research, it is usually necessary to collect underground soil and rock samples to analyze the underground hydrogeological conditions. Drilling detection devices are generally used to extract soil and rock core samples.

[0003] In the prior art, a hydrogeological drilling detection device disclosed in a Chinese patent (CN118500805A) relates to the field of geological drilling technology. A hydrogeological drilling detection device includes a bracket, a hand chain hoist, a ground-drilling pile and a squeeze pile. The ground-drilling pile includes an outer cylinder and an inner cylinder. The inner cylinder is rotatably installed in the middle of the outer cylinder. The inner wall of the outer cylinder is provided with a plurality of receiving grooves. The inner cylinder is provided with side grooves corresponding to the number of receiving grooves. A connecting rod is provided in each of the receiving grooves. A cutting piece is fixedly connected to the bottom end of the connecting rod for cutting off the soil block sample. This method has the following defects: when the cutting piece rotates to cut off the harder soil sample in the inner cylinder, the soil may be too hard and the cutting piece may not be able to be embedded in the soil sample. At this time, the soil sample in the inner cylinder cannot be smoothly taken out. At the same time, the soil sample needs to be pushed out of the inner cylinder to take it out. During this process, secondary disturbance will be caused to the soil sample close to the inner cylinder, destroying the integrity and destructiveness of the soil sample.

[0004] In the prior art, a hydrogeological drilling detection device disclosed in a Chinese patent (CN111982573B) belongs to the technical field of hydrogeological detection. A hydrogeological drilling detection device includes: a support frame, a stabilizing frame, a drilling assembly arranged on the stabilizing frame, and a power assembly arranged on the support frame; the drilling assembly includes a drill barrel and a drill rod both arranged vertically; the top of the drill barrel is connected to the power assembly, the outer wall of the drill barrel is connected to the stabilizing frame through a thread, and the bottom end of the drill barrel is provided with a first conical surface; the drill rod passes through the drill barrel, the top of the drill rod is connected to the power assembly, the side wall of the drill rod is connected to the inner wall of the drill barrel through a thread, and a drill bit is provided at the bottom of the drill rod, and the second conical surface of the drill bit is located in the extension direction of the first conical surface; This method has the following defects: the device has limitations on the soil requirements for detectable sampling, and the preservation effect of soil samples is not good. When the water content in the soil sample is high and the soil is relatively loose, part of the soil sample will flow down with the spiral groove during the removal of the soil sample from the spiral groove of the drill rod, causing damage to the sample; when the soil is hard, the soil sample in the spiral drill rod may break due to the hard and brittle soil, reducing the quality of the sample and destroying the integrity and purity of the soil sample.

[0005] The defects existing in the above-mentioned prior art are summarized as follows: 1. For soil layers with a relatively hard texture, the cutting piece of the device cannot smoothly cut into and break the soil sample, resulting in the inability to smoothly remove the soil sample, or the spiral structure causes the soil sample to break, resulting in the loss of integrity of the soil sample; 2. For relatively loose soil, the spiral sampling structure of the device causes great damage to the soil sample and cannot smoothly retain all samples, thereby reducing the quality of the sample; 3. During the secondary transfer process of the soil samples obtained by the above method, whether it is pushing the soil sample out of the inner cylinder or removing the soil sample from the spiral sampling groove, it is easy to cause secondary disturbance to the soil sample, resulting in the destruction of the integrity and purity of the soil sample.

[0006] To this end, this article provides a hydrogeological drilling detection device. Summary of the invention

[0007] In order to solve the above technical problems, the present invention discloses a hydrogeological drilling detection device, which adopts a new inner cylinder structure to prevent the sample from being unable to be taken out of the outer cylinder when the soil sample is too hard, thereby improving the sampling effect of the device on hard soil; enhancing the sampling effect on loose soil, ensuring the protection of the soil layer structure during the soil sample removal process; and adopting a new extraction method to reduce secondary disturbance of the soil sample, thereby improving the integrity and purity of the soil sample.

[0008] In order to achieve the above-mentioned technical effect, the present invention provides a hydrogeological drilling detection device, including a support and a sampling device, wherein the sampling device is arranged in the middle of the support which can be lifted up and down; the sampling device also includes a drill rod device and a sampling barrel, and the sampling barrel which can completely take out the loose soil sample is arranged inside the drill rod device which can automatically cut the soil sample.

[0009] Preferably, the support is provided with a platform for driving the sampling device to move up and down.

[0010] Preferably, the drill rod device also includes a shell a, a drive motor, a gear a, a gear b, and a drilling mechanism. The drilling mechanism is arranged in the interlayer inside the shell a, the drive motor is arranged on the right side of the platform and the front end of the drive motor is connected to the gear a, the gear b is arranged on the outside of the shell a and meshes with the gear a, and the gear b is slidably connected to the platform.

[0011] Preferably, the drilling mechanism also includes a telescopic electric cylinder, a bracket, a connecting rod, and a drill bit. The telescopic electric cylinders are respectively arranged on the upper and outer sides of the outer shell a, the bracket is arranged above the outer shell a and connected to the front end output end of the telescopic electric cylinder, the connecting rod is arranged on the inner side of the outer shell a and is slidably connected to the outer shell a, the drill bit is arranged below the outer shell a, and one end above the drill bit is hinged to the outer side of the outer shell a, and the other end of the outer shell a is hinged to the connecting rod.

[0012] Preferably, the drill bit is provided with a triangular block structure and has teeth on the inner side to increase the cutting function.

[0013] Preferably, the sampling tube also includes a shell b, a handle, a limit card, and a fixing card. The shell b is arranged on the inner side of the shell a, and the bottom of the shell b is slidingly connected to the shell a. The handle is arranged above the shell b, and the limit cards for limiting the sampling closing structure inside the shell b are respectively arranged above the shell b, and the fixing card for closing the shell b is arranged on the right side of the shell b.

[0014] Preferably, the housing b is provided with an elastic transparent plastic structure, and a structure that can be locked and closed with each other is provided below the fixing card.

[0015] Preferably, a spring sheet which rebounds inwards and seals closed is provided at the lower inner part of the shell b.

[0016] Preferably, the limit card also includes a limit plate, a spring, a buckle, and a leaf spring. The limit plate is arranged on the inner side of the shell b and is slidably connected to the shell b. The spring that provides power for the buckle to rebound is arranged between the limit plate and the shell b. The buckles are respectively arranged on both sides of the limit plate and the buckles are connected to the inner side of the shell a to form a mutually clamped structure. The top of the buckle is connected to the limit plate through a rotating shaft. The leaf spring that provides force for the clamping between the buckle and the shell b is arranged between the buckle and the limit plate.

[0017] Preferably, the fixing card is provided with a fixing hole seat and a fixing bolt, the fixing hole seats are respectively arranged on the left and right sides of the connection of the shell b, and the fixing bolts are connected to the fixing hole seats on both sides through threads.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The device adopts a support and a sampling device. Through the drill rod device in the sampling device that can automatically adjust and cut off the hard soil sample, and through the movable triangular block drill bit, the hard soil sample can be cut more easily, and the protection effect on the hard soil sample is better, thereby improving the sampling effect of the device on the hard soil; the sampling tube structure is adopted, when dealing with loose soil samples, the sampling tube can be closed from the bottom to prevent the soil sample from being lost, thereby enhancing the sampling effect on the loose soil and ensuring the protection of the soil layer during the soil sample removal process; the sampling tube with a transparent structure and the ability to be removed and opened, combined with the sampling method of the support, reduces the secondary disturbance of the soil sample in the process of removing the soil sample after sampling, thereby improving the integrity and purity of the soil sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an isometric view of the present invention; Figure 2 is a front view of the present invention; Figure 3 yes Figure 2 A cross-sectional view along section a; Figure 4 yes Figure 3 Partial schematic diagram of middle b; Figure 5 yes Figure 3 Partial schematic diagram of middle c; Figure 6 It is a right side view of the present invention; Figure 7 yes Figure 6 A cross-sectional view along section d; Figure 8 yes Figure 7 A partial schematic diagram of middle e; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Support; 2. Drill rod device; 3. Sampling tube; 4. Platform; 5. Housing a; 6. Driving motor; 7. Gear a; 8. Gear b; 9. Telescopic electric cylinder; 10. Bracket; 11. Connecting rod; 12. Drill bit; 13. Housing b; 14. Handle; 15. Limit card; 16. Fixing card; 17. Shrapnel; 18. Limiting plate; 19. Spring; 20. Buckle; 21. Leaf spring; 22. Fixing hole seat; 23. Fixing bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 8As shown, the prior art in this embodiment has the following problems: The inventors have found that the prior art has the following defects: 1. For a hard soil layer, the cutting piece of the device cannot smoothly cut into the soil sample to break it, resulting in the soil sample being unable to be smoothly taken out, or the spiral structure causes the soil sample to break, resulting in the loss of integrity of the soil sample; 2. For a loose soil, the spiral sampling structure of the device causes great damage to the soil sample and cannot smoothly retain all the samples, thereby reducing the quality of the sample; 3. During the secondary transfer process of the soil sample obtained by the above method, whether it is pushing the soil sample out of the inner cylinder or taking the soil sample out of the spiral sampling groove, it is easy to cause secondary disturbance to the soil sample, resulting in the destruction of the integrity and purity of the soil sample; Therefore, the inventor provides a hydrogeological drilling detection device, including a support 1 and a sampling device, wherein the sampling device is arranged in the middle of the support 1 which can be lifted up and down; the sampling device also includes a drill rod device 2 and a sampling barrel 3, and the sampling barrel 3 which can completely take out loose soil samples is arranged inside the drill rod device 2 which can automatically cut soil samples.

[0022] By adopting the above scheme, when sampling is needed, the control device support 1 drives the sampling device to move downward, and the drill rod device 2 in the sampling device rotates on the platform 4, so that the drilling mechanism drives the drill bit 12 at the lower end to rotate, and turns into the underground to cut the soil sample and the soil layer. After the drilling is completed, if the soil layer is hard, the telescopic electric cylinder 9 above the drilling mechanism is opened, and the telescopic electric cylinder 9 drives the drill bit 12 below to retract inward and continuously rotate to cut the soil sample. As the cutting surface of the drill bit 12 becomes larger and larger, and the stress inside the soil sample, the hard soil sample can be cut more easily, and then the limit card 15 is opened to make the spring piece 17 below the sampling tube 3 rebound inward and merge and close. As the soil is hard, the spring piece 17 fixes the soil sample from the side, which is convenient for removal, thereby improving the sampling efficiency of the device for hard soil. Sampling effect; if the soil sample is loose, after drilling is completed, the limit card 15 is opened to make the spring piece 17 under the sampling tube 3 rebound inward and merge and seal, preventing the soil sample from leaking out from under the sampling tube 3, thereby enhancing the sampling effect of loose soil and ensuring the protection of the soil layer during the soil sample removal process; after sampling is completed, the handle 14 on the sampling tube 3 is held to lift the sampling tube 3. The sampling tube 3 is a transparent structure, which is convenient for observing the state of the soil sample when it is just taken out. At the same time, during the collection process of the soil sample, the internal sampling tube 3 rotates less. At the same time, the inner wall of the sampling tube 3 is taken out together with the soil sample during the removal process. After observing the initial state and recording it, the fixing card 16 is opened to take out the soil sample in the sampling tube 3, thereby reducing the secondary disturbance to the soil sample and improving the integrity and purity of the soil sample.

[0023] Furthermore, the support 1 is provided with a platform 4 for driving the sampling device to move up and down; The platform 4 is used to install a sampling device, so that the support 1 drives the sampling device on the platform 4 to move up and down during sampling.

[0024] Furthermore, the drilling rod device 2 also includes a housing a5, a drive motor 6, a gear a7, a gear b8, and a ground drilling mechanism. The ground drilling mechanism is arranged in the interlayer inside the housing a5, the drive motor 6 is arranged on the right side of the platform 4 and the front end of the drive motor 6 is connected to the gear a7, the gear b8 is arranged outside the housing a5 and meshes with the gear a7, and the gear b8 is slidably connected to the platform 4; The driving motor 6 drives the gear a7 to rotate, so that the gear b8 drives the ground drilling mechanism to rotate, thereby providing power for the drill rod device 2 to drill downward.

[0025] Furthermore, the drilling mechanism also includes a telescopic electric cylinder 9, a bracket 10, a connecting rod 11, and a drill bit 12. The telescopic electric cylinder 9 is respectively arranged on the upper and outer sides of the housing a5, the bracket 10 is arranged on the upper side of the housing a5 and connected to the front output end of the telescopic electric cylinder 9, the connecting rod 11 is arranged on the inner side of the housing a5 and is slidably connected to the housing a5, the drill bit 12 is arranged below the housing a5, and one end of the drill bit 12 is hinged to the outer side of the housing a5, and the other end of the housing a5 is hinged to the connecting rod 11; Among them, the telescopic electric cylinder 9 extends upward, driving the connecting rod 11 on the bracket 10 to move upward, rotating the drill bit 12 about the connection between the drill bit 12 and the shell a5 as the axis, and lifting it upward, thereby continuously increasing the cutting surface between the drill bit 12 and the soil sample, making it easier for the drilling device to cut off the soil sample.

[0026] Furthermore, the drill bit 12 is provided with a triangular block structure and a tooth piece (not shown in the figure) is provided inside to increase the cutting function; Among them, after the triangular block drill bit 12 shrinks inward and upward, the contact area between the triangular block drill bit 12 and the soil sample increases, so that the cut surface continues to increase. At the same time, under the extrusion of the triangular block drill bit 12 and the stress of the soil sample itself, the harder soil sample can be cut more conveniently, thereby improving the sampling effect of the device on hard soil.

[0027] Furthermore, the sampling tube 3 also includes a shell b13, a handle 14, a limit card 15, and a fixing card 16. The shell b13 is arranged inside the shell a5, and the bottom of the shell b13 is slidably connected to the shell a5. The handle 14 is arranged above the shell b13. The limit cards 15 for limiting the sampling closing structure inside the shell b13 are respectively arranged above the shell b13, and the fixing card 16 for closing the shell b13 is arranged on the right side of the shell b13. Among them, the handle 14 is convenient for the operator to take out the sampling tube 3 after sampling, the outer shell b13 is slidably connected in the outer shell a5 to reduce the influence of the inner wall of the sampling tube 3 on the soil sample when drilling, the limit card 15 limits the spring piece 17 inside the outer shell b13 from popping out, and the fixing card 16 can fix the unfolded outer shell b13. After the sampling tube 3 is taken out for observation, the fixing card 16 can be opened to facilitate sampling.

[0028] Furthermore, the housing b13 is provided with an elastic transparent plastic structure, and a closed structure that can be mutually engaged is provided below the fixing card 16; The transparent shell b13 facilitates timely observation of the soil sample after taking it out, and the shell b13 can be opened outward by opening the fixing card 16, so as to facilitate taking out the soil sample and reduce secondary disturbance to the soil sample.

[0029] Furthermore, a spring sheet 17 is provided at the lower inner part of the housing b13 to rebound inwards and seal and close; The spring piece 17 at the lower inner side of the housing b13 can rebound inwards to close and seal when the limit is released. It can rebound and fix the soil sample when the soil is hard, and can also prevent the loose soil sample from leaking out.

[0030] Furthermore, the limiting card 15 also includes a limiting piece 18, a spring 19, a buckle 20, and a leaf spring 21. The limiting piece 18 is arranged on the inner side of the shell b13 and is slidably connected to the shell b13. The spring 19 that provides power for the buckle 20 to rebound is arranged between the limiting piece 18 and the shell b13. The buckles 20 are respectively arranged on both sides of the limiting piece 18 and the buckle 20 is connected to the inner side of the shell a5 to form a mutually clamped structure. The upper part of the buckle 20 is connected to the limiting piece 18 through a rotating shaft. The leaf spring 21 that provides a force for the clamping between the buckle 20 and the shell b13 is arranged between the buckle 20 and the limiting piece 18. Among them, under normal conditions, the buckle 20 is stuck in the joint with the shell b13, the leaf spring 21 prevents the buckle 20 from rebounding, and the limiting plate 18 clamps the spring piece 17 in the shell b13 to prevent the spring piece 17 from rebounding when drilling and sampling; when opening the spring piece 17, the operator pushes the two buckles 20 inward to release the buckle 20 from the shell b13, and the spring 19 makes the limiting plate 18 bounce upward to lower the spring piece 17 on the inside of the shell b13. When resetting is required, press the spring piece 17 on the shell b13 to reset it, and then press the limiting card 15 again to make the buckle 20 stuck on the shell.

[0031] Furthermore, the fixing card 16 is provided with a fixing hole seat 22 and a fixing bolt 23. The fixing hole seats 22 are respectively provided on the left and right sides of the connection of the housing b13. The fixing bolt 23 is connected to the fixing hole seats 22 on both sides by threads. Among them, the fixing bolts 23 are connected and inserted to make the fixing hole seats 22 on both sides drive the outer shell b13 to close, and the fixing bolts 23 are released to open the fixing hole seats 22 to expand the outer shell b13, so as to facilitate sampling and take out the soil sample in the sampling tube 3.

[0032] In summary, the device adopts a support 1 and a sampling device. Through the drill rod device 2 in the sampling device that can automatically adjust to cut off hard soil samples, and through the movable triangular block drill bit 12, the hard soil samples can be cut more easily, and the protection effect on the hard soil samples is better, thereby improving the sampling effect of the device on hard soil; the structure of the sampling tube 3 is adopted. When dealing with loose soil samples, the sampling tube 3 can be closed from the bottom to prevent the loss of soil samples, thereby enhancing the sampling effect on loose soil and ensuring the protection of the soil layer during the soil sample removal process; the transparent sampling tube 3 that can be taken out and opened, combined with the new sampling method of the support 1, reduces the secondary disturbance of the soil sample in the process of taking out the soil sample after sampling, thereby improving the integrity and purity of the soil sample.

[0033] Working principle of the present invention: When sampling is required, the control device support 1 drives the sampling device on the platform 4 to move downward, and the driving motor 6 in the drill rod device 2 drives the gear a7 to rotate, so that the gear b8 drives the ground drilling mechanism to rotate, providing power for the drill rod device 2 to drill downward so that the ground drilling mechanism drives the drill bit 12 at the lower end to rotate, drill into the ground and cut the soil sample from the soil layer; After the drilling is completed, if the soil is a harder layer, the operator opens the telescopic electric cylinder 9 above the drilling mechanism, and the telescopic electric cylinder 9 extends upward, driving the connecting rod 11 on the bracket 10 to move upward, and the drill bit 12 is rotated with the connection between the drill bit 12 and the housing a5 as the axis, lifted upward, and continuously rotated to cut the soil sample. After the drill bit 12 of the triangular block structure shrinks inward and upward, the contact surface between the triangular block drill bit 12 and the soil sample increases, so that the cut surface continues to increase. At the same time, under the extrusion of the triangular block drill bit 12 and the stress of the soil sample itself, the harder soil sample can be cut more conveniently, thereby improving the sampling effect of the device on hard soil and making it easier to cut the hard soil sample. Then, the limit card 15 is opened. Under normal conditions, the buckle 20 is stuck at the connection with the shell b13, and the leaf spring 21 prevents the buckle 20 from rebounding. The limit plate 18 clamps the spring piece 17 in the shell b13 to prevent the spring piece 17 from rebounding when drilling and sampling. When opening the spring piece 17, the operator pushes the two buckles 20 inward to release the buckle 20 from the shell b13, and the spring 19 makes the limit plate 18 bounce upward to put down the spring piece 17 on the inner side of the shell b13. The spring piece 17 has a tendency to retract inward to clamp the cut soil sample, thereby improving the sampling effect of the device on hard soil. If the soil sample is loose in texture, after drilling is completed, the limit card 15 is opened to make the spring piece 17 under the sampling tube 3 rebound inward and merge and seal, preventing the soil sample from leaking out from under the sampling tube 3, thereby enhancing the sampling effect on loose soil and ensuring the protection of the soil layer during the soil sample removal process; after sampling is completed, the handle 14 on the sampling tube 3 is held to lift the sampling tube 3 out, and the sampling tube 3 is a transparent structure, which is convenient for observing the state of the soil sample just taken out. At the same time, during the soil sample collection process, the internal sampling tube 3 rotates less. At the same time, the inner wall of the sampling tube 3 is taken out together with the soil sample during the removal process. After the initial state is observed and recorded, the fixing card 16 is opened again to take out the soil sample in the sampling tube 3, and the fixing hole seat 22 is opened to expand the shell b13, which is convenient for sampling observation. After that, the soil sample in the sampling tube 3 is taken out, which reduces the secondary disturbance to the soil sample and improves the integrity and purity of the soil sample; At this point, the working principle of the device has been described.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogeological drilling detection device, comprising a support (1) and a sampling device, wherein the sampling device is arranged in the middle of the support (1) which can be lifted up and down, and characterized in that: The sampling device further comprises a drill rod device (2) and a sampling barrel (3), wherein the sampling barrel (3) capable of completely taking out loose soil samples is arranged inside the drill rod device (2) capable of automatically cutting hard soil samples.

2. A hydrogeological drilling detection device according to claim 1, characterized in that: The support (1) is provided with a platform (4) for driving the sampling device to move up and down.

3. A hydrogeological drilling detection device according to claim 1, characterized in that: The drilling rod device (2) further comprises a housing a (5), a drive motor (6), a gear a (7), a gear b (8), and a ground drilling mechanism, wherein the ground drilling mechanism is arranged in a sandwich layer inside the housing a (5), the drive motor (6) is arranged on the right side of the platform (4) and the front end of the drive motor (6) is connected to the gear a (7), the gear b (8) is arranged on the outside of the housing a (5) and meshes with the gear a (7), and the gear b (8) is slidably connected to the platform (4).

4. A hydrogeological drilling detection device according to claim 3, characterized in that: The drilling mechanism further comprises a telescopic electric cylinder (9), a bracket (10), a connecting rod (11), and a drill bit (12). The telescopic electric cylinder (9) is arranged on the upper and outer sides of the housing a (5), the bracket (10) is arranged on the upper side of the housing a (5) and connected to the front output end of the telescopic electric cylinder (9), the connecting rod (11) is arranged on the inner side of the housing a (5) and is slidably connected to the housing a (5), the drill bit (12) is arranged below the housing a (5), and one end of the drill bit (12) is hingedly connected to the outer side of the housing a (5), and the other end of the housing a (5) is hingedly connected to the connecting rod (11).

5. A hydrogeological drilling detection device according to claim 4, characterized in that: The drill bit (12) is provided with a triangular block structure and has teeth on the inner side for enhancing the cutting function.

6. A hydrogeological drilling detection device according to claim 1, characterized in that: The sampling tube (3) further comprises a shell b (13), a handle (14), a limit card (15), and a fixing card (16); the shell b (13) is arranged on the inner side of the shell a (5), and the bottom of the shell b (13) is slidably connected to the shell a (5); the handle (14) is arranged above the shell b (13); the limit cards (15) for limiting the sampling closing structure inside the shell b (13) are respectively arranged above the shell b (13); and the fixing card (16) for closing the shell b (13) is arranged on the right side of the shell b (13).

7. A hydrogeological drilling detection device according to claim 6, characterized in that: The housing b (13) is provided with an elastic transparent plastic structure, and a structure capable of being locked and closed is provided below the fixing card (16).

8. The hydrogeological drilling detection device according to claim 6, characterized in that: The lower inner portion of the housing b (13) is provided with a spring sheet (17) that rebounds inwards to seal and close.

9. A hydrogeological drilling detection device according to claim 6, characterized in that: The limiting card (15) further comprises a limiting plate (18), a spring (19), a buckle (19), and a leaf spring (21). The limiting plate (18) is arranged on the inner side of the housing b (13) and is slidably connected to the housing b (13). The spring (19) for providing power for the buckle (19) to rebound is arranged between the limiting plate (18) and the housing b (13). The buckles (19) are respectively arranged on both sides of the limiting plate (18) and the buckles (19) are connected to the inner side of the housing a (5) to form a mutually clamped structure. The upper side of the buckle (19) is connected to the limiting plate (18) via a rotating shaft. The leaf spring (21) for providing a force for the clamping between the buckle (19) and the housing b (13) is arranged between the buckle (19) and the limiting plate (18).

10. The hydrogeological drilling detection device according to claim 6, characterized in that: The fixing card (16) is provided with a fixing hole seat (21) and a fixing bolt (22). The fixing hole seats (21) are respectively provided on the left and right sides of the connection of the housing b (13). The fixing bolt (22) is connected to the fixing hole seats (21) on both sides through threads.

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