Fixing device for sampling in hydrogeological exploration

Abstract

The invention relates to the technical field of hydrogeological exploration, and discloses a fixing device for sampling in hydrogeological exploration, which comprises a support frame. According to the fixing device for sampling in hydrogeological exploration, a hydraulic cylinder I drives an annular block and a connecting plate to move downwards through an output end, and a driving motor drives a drill rod to perform rotary drilling towards a stratum through the output end while moving, so that the drill rod can be preliminarily fixed; then a second hydraulic cylinder drives a limiting claw to stretch out of a rectangular hole, the limiting claw is nailed on the wall of the drill hole through electrification of an electromagnet and magnetic coupling of the electromagnet and a magnetic piece, mechanical clamping force is formed, the fixing force is further enhanced, and a double-fixing mode of magnetic adsorption and mechanical clamping is formed; due to the fact that water exists in a soil body, the expansion piece on the limiting claw can expand when meeting water, the conical needle is driven to move obliquely upwards during expansion so that the conical needle can be punctured into a stratum hole, the device is fixed through the mechanical wedge-caulking effect, and therefore the anchoring force in a loose soil layer or a fractured rock layer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogeological exploration, in particular to a fixing device for sampling in hydrogeological exploration. BACKGROUND

[0002] In the field of hydrogeological exploration, the stability and reliability of the fixing device during the sampling process directly affect the accuracy of the sample and the efficiency of the exploration.

[0003] The traditional hydrogeological exploration sampling fixing device usually has the following problems: for loose soil layer, humid or fissure developed stratum, the traditional fixing device is difficult to provide sufficient fixing force, the high permeability or mechanical heterogeneity of the stratum easily leads to the displacement and inclination of the device, and even the hole collapse during the drilling process, resulting in sampling failure or sample contamination, therefore, the fixing device for sampling in hydrogeological exploration is proposed to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a fixing device for sampling in hydrogeological exploration, which solves the problems mentioned in the background art.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a fixing device for sampling in hydrogeological exploration, comprising a support frame, a sampling structure and a fixing structure, the fixing structure comprises a support cylinder, an annular block is slidably connected to the outer wall of the support cylinder, T-shaped blocks are symmetrically fixedly installed on the inner wall of the annular block, a plurality of annularly arranged connecting plates are fixedly connected to the outer wall of the annular block, a drive motor is fixedly installed on the plurality of connecting plates, a drill rod is fixedly connected to the output end of the drive motor, a cavity is formed in the drill rod, a plurality of annularly arranged rectangular holes are formed in the outer wall of the drill rod, magnetic pieces are symmetrically fixedly installed on the inner walls of the plurality of rectangular holes, and a limiting assembly is arranged in the cavity. The limiting assembly comprises a hydraulic cylinder two, the hydraulic cylinder two is fixedly installed on the inner wall of the cavity, two connecting blocks are fixedly connected to the outer wall of the output end of the hydraulic cylinder two, a limiting claw is hingedly connected to the outer walls of the two connecting blocks, and electromagnets are fixedly installed on the outer walls of the two sides of the limiting claw. A groove is formed in the upper surface of the limiting claw, an expansion piece and a conical needle are arranged in the groove, an extension spring is arranged on the limiting claw, a plurality of annularly arranged fixing grooves are formed below the connecting blocks on the outer wall of the output end of the hydraulic cylinder two, and a sealing ring is fixedly installed below the connecting blocks on the outer wall of the output end of the hydraulic cylinder two.

[0006] Further, the fixing structure further comprises a material guiding block and a conical sandbag, the outer wall of the material guiding block is fixedly installed on the inner wall of the supporting cylinder, the inside of the conical sandbag is fixedly installed on the outer wall of the bottom end of the supporting cylinder, the supporting cylinder and the outer wall of the conical sandbag are provided with an arc-shaped hole, the outer wall of the conical sandbag is fixedly communicated with a discharging pipe, and the outer wall of the supporting cylinder is symmetrically provided with a T-shaped sliding groove.

[0007] Further, the material guiding block is in the shape of a truncated cone, is located on one side of the arc-shaped hole, and is in communication between the supporting cylinder and the conical sandbag.

[0008] Further, the expanding piece is fixedly installed in the groove on the upper surface of the limiting claw, and the conical needle is fixedly installed on the outer wall of the expanding piece.

[0009] Further, the two ends of the telescopic spring are fixedly installed on the lower surface of the limiting claw and in the fixed groove.

[0010] Further, the outer wall of the sealing ring is attached to the inner wall of the cavity, and the material of the sealing ring is fluorine rubber.

[0011] Further, the rectangular hole is in communication with the cavity, and the size of the rectangular hole is matched with the size of the limiting claw.

[0012] Further, the annular block is slidably connected with the outer wall of the supporting cylinder through a T-shaped block, the cross-sectional dimension of the T-shaped sliding groove is 1.1 times of the cross-sectional dimension of the T-shaped block, and the inner wall roughness of the T-shaped sliding groove is Ra≤1.6 μm.

[0013] Further, the tip hardness of the conical needle on the expanding piece is ≥HRC55, and the elastic coefficient of the telescopic spring is 5-10 N / mm.

[0014] Further, the magnetic piece is a permanent magnet or an electromagnet.

[0015] Further, the lower surface of the supporting frame is fixedly installed with a hydraulic cylinder one, and the output end of the hydraulic cylinder one is fixedly connected with the annular block.

[0016] The beneficial effects of the present application are: 1. The fixed device for sampling in hydrogeological exploration, the hydraulic cylinder one drives the annular block and the connecting plate to move downward through the output end, and drives the motor to rotate the drill rod into the stratum to preliminarily fix the drill rod while moving through the output end; the hydraulic cylinder two in the limiting assembly drives the limiting claw to extend out of the rectangular hole, the electromagnetic iron and the magnetic element are magnetically coupled by electrifying the electromagnetic iron, and the limiting claw is further "nailed" on the drill hole wall, forming mechanical clamping force to further enhance the fixing force, forming the double fixing mode of "magnetic adsorption + mechanical clamping", because there is moisture in the soil, the expansion element is installed on the limiting claw, the expansion element expands when encountering water, and the conical needle moves obliquely upward when expanding to make the conical needle pierce into the stratum pore, the fixed device is fixed by using mechanical wedge tightening effect, and the anchoring force in loose soil layer or fissured rock layer is significantly improved.

[0017] 2. The fixed device for sampling in hydrogeological exploration, the conical sandbag can pour in slag, water or sandstone through the supporting cylinder and the arc-shaped hole, after the conical sandbag stores slag, the self weight increases (can accumulate several kilograms to several tens of kilograms), the vertical pressure of the supporting cylinder and the ground is enhanced by gravity, so that the overall stability of the device is improved, especially in loose stratum (such as sandy soil and silty clay), the sandbag weight can offset part of the horizontal thrust, and the risk of tilting of the supporting cylinder is reduced; the flexible material (such as canvas or rubber) of the conical sandbag can deform with the concave-convex deformation of the ground, fill the gap between the supporting cylinder and the stratum, form a passive wedge tightening effect, and be especially suitable for uneven field operation surface; the gravity fixation of the conical sandbag belongs to static foundation support, and the "magnetic adsorption + mechanical clamping + expansion anchoring" of the limiting assembly belongs to dynamic deep fixation, and the two form a three-dimensional fixing system in cooperation from top to bottom: the bottom end of the supporting cylinder stabilizes the bottom of the device through the sandbag gravity; the middle part of the drill rod is embedded in the middle part of the stratum through the limiting claw, and resists horizontal displacement; the magnetic element and the electromagnetic iron provide radial adsorption force, and reduce shaking. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment description or the prior art will be briefly introduced below.

[0019] Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a structural sectional view of the present application; Figure 3 It is a partial sectional view of the fixed structure of the present application; Figure 4 It is a partial sectional view of the drill rod structure of the present application; Figure 5 It is a partial sectional view of the limiting assembly of the present application Figure 4 Figure 6 It is a partial sectional view of the limiting assembly of the present application​

[0020] Explanation of reference signs: 1, support frame; 2, sampling structure; 3, fixing structure; 31, support cylinder; 32, material guiding block; 33, conical sandbag; 34, arc-shaped hole; 35, discharging pipe; 36, T-shaped chute; 371, annular block; 372, T-shaped block; 373, connecting plate; 374, driving motor; 375, drill rod; 376, cavity; 377, rectangular hole; 378, magnetic piece; 379, limiting assembly; 3791, hydraulic cylinder two; 3792, connecting block; 3793, limiting claw; 3794, electromagnet; 3795, groove; 3796, expansion piece; 3797, conical needle; 3798, extension spring; 3799, fixing groove; 37910, sealing ring; 38, hydraulic cylinder one. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0022] Please refer to Figures 1-6 , the fixing device for sampling in hydrogeological exploration, comprising a support frame 1, a sampling structure 2 and a fixing structure 3, the fixing structure 3 comprises a support cylinder 31, the outer wall of the support cylinder 31 is slidably connected with an annular block 371, the inner wall of the annular block 371 is symmetrically fixedly installed with a T-shaped block 372, the outer wall of the annular block 371 is fixedly connected with a plurality of annularly arranged connecting plates 373, a driving motor 374 is fixedly installed on the plurality of connecting plates 373, the output end of the driving motor 374 is fixedly connected with a drill rod 375, the drill rod 375 is provided with a cavity 376 inside, a plurality of annularly arranged rectangular holes 377 are formed on the outer wall of the drill rod 375, a magnetic piece 378 is symmetrically fixedly installed on the inner wall of each of the plurality of rectangular holes 377, and a limiting assembly 379 is arranged in the cavity 376. The limiting assembly 379 comprises a hydraulic cylinder two 3791, the hydraulic cylinder two 3791 is fixedly installed on the inner wall of the cavity 376, the output end outer wall of the hydraulic cylinder two 3791 is fixedly connected with two connecting blocks 3792, the outer wall of the two connecting blocks 3792 is hingedly connected with a limiting claw 3793, and the two side outer walls of the limiting claw 3793 are fixedly installed with electromagnets 3794. A groove 3795 is formed on the upper surface of the limiting claw 3793, an expansion piece 3796 and a conical needle 3797 are arranged in the groove 3795, an extension spring 3798 is arranged on the limiting claw 3793, a plurality of annularly arranged fixing grooves 3799 are formed below the connecting blocks 3792 on the output end outer wall of the hydraulic cylinder two 3791, and a sealing ring 37910 is fixedly installed below the connecting blocks 3792 on the output end outer wall of the hydraulic cylinder two 3791.

[0023] In this embodiment, by starting the hydraulic cylinder 38, the hydraulic cylinder 38 drives the annular block 371, the T-shaped block 372 and the connecting plate 373 to move downward along the T-shaped sliding groove 36, and at the same time, the driving motor 374 is started, the driving motor 374 drives the drill pipe 375 to move into the stratum to drill a hole, and when the drill pipe 375 moves to a suitable position, the position of the drill pipe 375 is preliminarily fixed; the hydraulic cylinder two 3791 in the limiting assembly 379 drives the limiting claw 3793 to extend out of the rectangular hole 377, and by energizing the electromagnet 3794, the electromagnet 3791 is magnetically coupled with the magnetic member 378 (such as opposite poles attracting each other), and the limiting claw 3793 is further "nailed" on the hole wall to form a mechanical clamping force (single claw clamping force ≥1000N) to further enhance the fixing force, forming a double fixing mode of "magnetic adsorption + mechanical clamping"; because there is water in the soil, the limiting claw 3793 is provided with an expansion member 3796, which will expand when encountering water, and when expanding, the conical needle 3797 moves obliquely upward to penetrate into the stratum pore, and the mechanical wedge tightening effect is used to fix the device, which significantly improves the anchoring force in loose soil or fissured rock stratum.

[0024] Referring to Figures 1-3 As shown in the figure, the fixing structure 3 further comprises a material guiding block 32 and a conical sandbag 33, the outer wall of the material guiding block 32 is fixedly installed on the inner wall of the supporting cylinder 31, the inside of the conical sandbag 33 is fixedly installed on the outer wall at the bottom end of the supporting cylinder 31, the supporting cylinder 31 and the outer wall of the conical sandbag 33 are provided with an arc-shaped hole 34, the outer wall of the conical sandbag 33 is fixedly communicated with a discharging pipe 35, the discharging pipe 35 of the outer wall of the conical sandbag 33 can be externally connected with a negative pressure pump or a hose, and the stored muck is discharged regularly (Figure 3), which avoids the device from being difficult to lift due to the overloading of the sandbag, and at the same time, the controllability of the gravity fixing effect is maintained, and the outer wall of the supporting cylinder 31 is symmetrically provided with a T-shaped sliding groove 36.

[0025] In this embodiment, the conical sandbag 33 at the bottom end of the supporting cylinder 31 is communicated with the inside through the arc-shaped hole 34, and the drill cuttings, soil particles and other impurities generated by drilling can be poured into the inside of the supporting cylinder 31, guided by the material guiding block 32 (frustum-shaped structure) to the arc-shaped hole 34, and stored in the conical sandbag 33, so that the conical sandbag 33 generates gravity to fix the supporting cylinder 31; after the conical sandbag 33 stores the muck, the weight of the conical sandbag 33 increases (which can accumulate several kilograms to several dozen kilograms), and the vertical pressure of the supporting cylinder 31 and the ground is enhanced through the gravity effect, thereby improving the overall stability of the device, especially in loose stratum (such as sandy soil and silty clay), the weight of the sandbag can offset part of the horizontal thrust, and the risk of tilting of the supporting cylinder 31 is reduced; the flexible material (such as canvas or rubber) of the conical sandbag 33 can deform with the concave-convex deformation of the ground, fill the gap between the supporting cylinder 31 and the stratum, and form a passive wedge tightening effect, which is especially suitable for uneven field operation surfaces.

[0026] Referring toFigure 2 、 Figure 3 As shown in FIG. 6, the guide block 32 is frustoconical, and the guide block 32 is located on one side of the arc-shaped hole 34 and is connected with the conical sandbag 33.

[0027] In this embodiment, the conical sandbag 33 provides a static stability basis for the support cylinder 31 through the gravity generated by the stored slag and the friction with the ground, and is especially suitable for exploration scenes that need to be fixed for a long time or loose strata. The design is complementary to the dynamic fixing of the limiting assembly 379, and together guarantees the overall rigidity and anti-interference ability of the device during sampling.

[0028] Referring to FIG. 6, Figure 5 、 Figure 6 As shown in FIG. 6, the expansion piece 3796 is fixedly installed in the groove 3795 on the upper surface of the limiting claw 3793, and the conical needle 3797 is fixedly installed on the outer wall of the expansion piece 3796.

[0029] In this embodiment, the expansion piece 3796 is preferably a high-molecular water-absorbing expansion material (such as an acrylic rubber), which expands by 2-3 times in volume after contacting with stratum moisture, pushes the conical needle 3797 to pierce into the pore in an obliquely upward direction, and the hardness of the tip of the conical needle 3797 is ≥HRC55 (close to hard alloy), which can penetrate loose sand or fissured rock surface and form a mechanical wedge point.

[0030] Referring to FIG. 6, Figure 6 As shown in FIG. 6, the two ends of the extension spring 3798 are fixedly installed on the lower surface of the limiting claw 3793 and in the fixed groove 3799.

[0031] In this embodiment, the extension spring 3798 has an elastic coefficient of 5-10 N / mm, one end is connected to the lower surface of the limiting claw 3793, and the other end is embedded in the fixed groove 3799. When the expansion piece 3796 expands and generates an upward pushing force, the spring is compressed and deformed to absorb stress, avoiding excessive extrusion of the limiting claw 3793 on the stratum and causing structural damage. At the same time, when the stratum has a slight settlement, the spring rebounds to compensate for the displacement and maintain the stability of the fixing force.

[0032] Referring to FIG. 6, Figure 3 As shown in FIG. 6, the outer wall of the sealing ring 37910 is in close contact with the inner wall of the cavity 376, and the material of the sealing ring 37910 is fluororubber.

[0033] In this embodiment, the fluororubber sealing ring 37910 at the output end of the hydraulic cylinder two 3791 is in close contact with the inner wall of the cavity 376, preventing underground water or mud from seeping into the inside of the device, ensuring the stable operation of the mechanical structure of the limiting assembly 379, and avoiding the pollution of the sample by external impurities.

[0034] Referring to FIG. 6, Figure 4As shown, the rectangular hole 377 is in communication with the cavity 376, and the size of the rectangular hole 377 is matched with the size of the limiting claw 3793.

[0035] Referring to Figure 2 , Figure 3 As shown, the annular block 371 is slidably connected with the outer wall of the support cylinder 31 through the T-shaped block 372, the cross-sectional size of the T-shaped sliding groove 36 is 1.1 times the cross-sectional size of the T-shaped block 372, and the inner wall roughness Ra of the T-shaped sliding groove 36 is ≤1.6 μm.

[0036] In this embodiment, the driving motor 374 on the annular block 371 directly drives the drill rod 375 to rotate the hole, without the need for additional transmission mechanism, simplifying the operation process; the multiple groups of driving motors 374 are arranged in an annular manner and can be operated synchronously, improving the drilling efficiency and being suitable for large-scale exploration scenes.

[0037] Referring to Figure 6 As shown, the tip hardness of the conical needle 3797 on the expansion piece 3796 is ≥HRC55, and the elastic coefficient of the extension spring 3798 is 5-10 N / mm.

[0038] Referring to Figure 5 As shown, the magnetic member 378 is a permanent magnet or an electromagnet.

[0039] Referring to Figure 1 , Figure 2 As shown, the lower surface of the support frame 1 is fixedly installed with the hydraulic cylinder one 38, and the output end of the hydraulic cylinder one 38 is fixedly connected with the annular block 371.

[0040] In this embodiment, the hydraulic cylinder one 38 below the support frame 1 drives the annular block 371 to slide along the T-shaped sliding groove 36 of the outer wall of the support cylinder 31, drives the drill rod 375 to move up and down, and realizes the accurate control of the drilling depth; the cooperation of the T-shaped sliding groove 36 and the T-shaped block 372 (the cross-sectional size difference is 1.1 times, and the inner wall roughness Ra is ≤1.6 μm) ensures smooth sliding and no radial shaking, and improves the drilling perpendicularity.

[0041] In use, the hydraulic cylinder one 38 is started, the annular block 371, the T-shaped block 372 and the connecting plate 373 are driven by the output end of the hydraulic cylinder one 38 to move downward along the T-shaped sliding groove 36, the driving motor 374 is started at the same time, the drill rod 375 is driven by the output end of the driving motor 374 to move and drill into the stratum, and the drill rod 375 is stopped when it moves to a suitable position, preliminarily fixing the position of the drill rod 375; the hydraulic cylinder two 3791 in the limiting assembly 379 is started, the connecting block 3792 and the limiting claw 3793 are driven by the output end of the hydraulic cylinder two 3791 to move downward together with the sealing ring 37910, the sealing ring 37910 is away from the rectangular hole 377, and the limiting claw 3793 is extended out of the rectangular hole 377 by the elastic force of the extension spring 3798. Figure 6By energizing electromagnet 3794, electromagnet 3791 and magnetic component 378 are magnetically coupled (e.g., opposite poles attract each other), further "nailing" the limiting claw 3793 to the borehole wall, forming a mechanical clamping force (single claw clamping force ≥1000N), which further enhances the fixing force, forming a dual fixing mode of "magnetic adsorption + mechanical clamping"; because there is moisture in the soil, an expansion component 3796 is installed on the limiting claw 3793. The expansion component 3796 expands when it comes into contact with water, and when it expands, it drives... The conical needle 3797 moves obliquely upward to penetrate the pores of the stratum, and uses mechanical wedging to fix the device, which significantly improves the anchoring force in loose soil or fractured rock layers. The conical sandbag 33 can be filled with slag, water or sand through the support cylinder 31 and the arc-shaped hole 34. After storing slag, the weight of the conical sandbag 33 increases (it can accumulate several kilograms to tens of kilograms), which enhances the vertical pressure between the support cylinder 31 and the ground through gravity, thereby improving the overall stability of the device. Especially in loose strata (such as sand and silty clay), the weight of the sandbags can offset some of the horizontal thrust, reducing the risk of tilting of the support cylinder 31; the flexible material (such as canvas or rubber) of the conical sandbags 33 can deform with the unevenness of the ground, filling the gap between the support cylinder 31 and the stratum, forming a passive wedging effect, which is especially suitable for uneven field work surfaces; the gravity fixation of the conical sandbags 33 is a static foundation support, while the "magnetic adsorption + mechanical clamping + expansion anchoring" of the limiting component 379 is a dynamic deep fixation, and the two form a three-dimensional fixation system with upper and lower coordination: the bottom of the support cylinder 31 is stabilized by the gravity of the sandbags; the middle of the drill rod 375 is embedded in the ground by the limiting claw 3793. In the middle of the layer, it resists horizontal displacement; magnetic component 378 and electromagnet 3794 provide radial adsorption force to reduce shaking; the discharge pipe 35 on the outer wall of the conical sandbag 33 can be connected to a negative pressure pump or hose to periodically discharge the stored slag (Figure 3), to avoid the sandbag being too heavy and making it difficult to lift the device, while maintaining the controllability of the gravity fixation effect; the conical sandbag 33 provides a static stability foundation for the support cylinder 31 through the gravity generated by storing slag, combined with the friction between its conical structure and the ground, which is especially suitable for exploration scenarios that require long-term fixation or loose strata. This design complements the dynamic fixation of the limiting component 379, together ensuring the overall rigidity and anti-interference ability of the device during the sampling process; Release from fixation: Turn off the power to electromagnet 3794 to stop magnetic coupling; hydraulic cylinder 2 3791 retracts in the reverse direction, driving the limit claw 3793 to retract into the cavity 376, the expansion component 3796 returns to its original shape, the conical needle 3797 detaches from the formation, the telescopic spring 3798 resets, and the limit claw 3793 returns to its position; hydraulic cylinder 1 38 drives the annular block 371 to slide upward, lifting the drill rod 375 and the support cylinder 31 out of the borehole, the conical sandbag 33 can be reused or replaced with the excavated soil, completing one exploration operation (Figure 1).

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixing device for sampling in hydrogeological exploration, comprising a support frame (1), a sampling structure (2), and a fixing structure (3), characterized in that: The fixed structure (3) includes a support cylinder (31), an annular block (371) is slidably connected to the outer wall of the support cylinder (31), T-shaped blocks (372) are symmetrically fixedly installed on the inner wall of the annular block (371), a number of annularly arranged connecting plates (373) are fixedly connected to the outer wall of the annular block (371), a drive motor (374) is fixedly installed on the number of connecting plates (373), a drill rod (375) is fixedly connected to the output end of the drive motor (374), a cavity (376) is opened in the drill rod (375), a number of annularly arranged rectangular holes (377) are opened on the outer wall of the drill rod (375), magnetic components (378) are symmetrically fixedly installed on the inner walls of the number of rectangular holes (377), and a limit component (379) is provided in the cavity (376). The limiting component (379) includes a second hydraulic cylinder (3791), which is fixedly installed on the inner wall of the cavity (376). Two connecting blocks (3792) are fixedly connected to the outer wall of the output end of the second hydraulic cylinder (3791). Limiting claws (3793) are hinged to the outer walls of the two connecting blocks (3792). Electromagnets (3794) are fixedly installed on the outer walls of both sides of the limiting claws (3793). The upper surface of the limiting claw (3793) is provided with a groove (3795), and an expansion member (3796) and a conical needle (3797) are provided in the groove (3795). The limiting claw (3793) is provided with a telescopic spring (3798). The outer wall of the output end of the hydraulic cylinder (3791) is provided with a number of annularly arranged fixing grooves (3799) below the connecting block (3792). A sealing ring (37910) is fixedly installed on the outer wall of the output end of the hydraulic cylinder (3791) below the connecting block (3792).

2. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The fixed structure (3) also includes a guide block (32) and a conical sandbag (33). The outer wall of the guide block (32) is fixedly installed on the inner wall of the support cylinder (31). The inner wall of the conical sandbag (33) is fixedly installed on the bottom outer wall of the support cylinder (31). The outer walls of the support cylinder (31) and the conical sandbag (33) are provided with arc-shaped holes (34). The outer wall of the conical sandbag (33) is fixedly connected to a discharge pipe (35). The outer wall of the support cylinder (31) is symmetrically provided with T-shaped grooves (36).

3. The fixing device for sampling in hydrogeological exploration according to claim 2, characterized in that: The guide block (32) is frustoconical and located on one side of the arc-shaped hole (34). The support cylinder (31) is connected to the conical sandbag (33).

4. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The expansion member (3796) is fixedly installed in the groove (3795) on the upper surface of the limiting claw (3793), and the conical needle (3797) is fixedly installed on the outer wall of the expansion member (3796).

5. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The two ends of the telescopic spring (3798) are fixedly installed on the lower surface of the limiting claw (3793) and in the fixing groove (3799).

6. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The outer wall of the sealing ring (37910) fits against the inner wall of the cavity (376), and the sealing ring (37910) is made of fluororubber.

7. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The rectangular hole (377) is connected to the cavity (376), and the size of the rectangular hole (377) is adapted to the size of the limiting claw (3793).

8. The fixing device for sampling in hydrogeological exploration according to claim 2, characterized in that: The annular block (371) is slidably connected to the outer wall of the support cylinder (31) via the T-shaped block (372). The cross-sectional size of the T-shaped groove (36) is 1.1 times the cross-sectional size of the T-shaped block (372). The roughness Ra of the inner wall of the T-shaped groove (36) is ≤1.6μm.

9. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The tip hardness of the conical needle (3797) on the expansion member (3796) is ≥HRC55, and the elastic coefficient of the telescopic spring (3798) is 5-10N / mm.

10. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: The magnetic component (378) is a permanent magnet or an electromagnet.

11. The fixing device for sampling in hydrogeological exploration according to claim 1, characterized in that: A hydraulic cylinder (38) is fixedly installed on the lower surface of the support frame (1), and the output end of the hydraulic cylinder (38) is fixedly connected to the annular block (371).

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