Underground soil sampling device for collapsible loess exploratory well

Abstract

The invention relates to the technical field of exploratory well sampling, and discloses an underground soil sampling device for a collapsible loess exploratory well, the underground soil sampling device comprises a sampling mechanism and a lifting mechanism used for carrying out lifting driving on the sampling mechanism, the lifting mechanism comprises a portal frame, and a control box is installed on one side of the portal frame; a winding machine is fixedly mounted at the top of the portal frame, and the winding end of the winding machine is connected with the sampling mechanism through a rope. According to the underground soil sampling device for the collapsible loess exploratory well, loess on the inner wall of the well can be extracted through the sampling piece, the positioning piece is used for locking the protective shell during sampling, the stability of the sampling mechanism during soil sampling is guaranteed, the electric air cylinder is arranged, stretching driving can be conducted on the sampling piece, and the sampling piece can be driven by the electric air cylinder; according to the underground soil sampling device, sampling work is formed, stretching driving can be synchronously conducted on the positioning piece, positioning work of the sampling position is formed, the good linkage function is achieved, and then the underground soil sampling fluency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of exploration well sampling, in particular to an underground soil sampling device for collapsible loess exploration wells. Background Art

[0002] Collapsible loess refers to soil that undergoes significant additional deformation due to structural damage of the soil after immersion in water under the self-weight stress of the overlying soil layer, or under the combined action of self-weight stress and additional stress. It has collapsibility. In engineering and scientific research work, in order to conduct geological surveys, it is generally necessary to sample and study the loess in the exploration well. The traditional exploration well sampling operation is generally to take out soil samples by manually digging the well. After searching, the Chinese invention patent with publication number CN112729907B discloses an automatic underground soil sampling device for collapsible loess exploration wells, including a sampling device and a hoisting device for placing the sampling device underground. The sampling device includes a protective shell, a sampling structure arranged in the protective shell, and a push-out structure. By adopting the above technical solution, when the pressure sensor detects that the resistance of the sampling knife group is too large during movement, the controller controls the second relay to disconnect, so that the power supply circuit of the drive component is cut off, and then the sampling knife group stops sampling to protect the sampling knife group.

[0003] When taking soil, the above-mentioned automatic underground soil sampling device moves the sampling mechanism into the exploration well through the hoisting device, and then uses the sampling mechanism to excavate the inner wall of the well for sampling. However, the soil sampling equipment has certain defects in the actual operation process. For example, when sampling, the sampling mechanism needs to be limited to a specified height by an independently set fixing mechanism, and then the sampling knife group needs to be moved sideways and out of the shell by a pushing mechanism to form the sampling work. During its operation, there is a lack of continuity, which reduces the orderliness of sampling. Moreover, the above-mentioned sampling method can only sample loess in a single direction, and it is impossible to perform sampling work in different directions according to different needs, which reduces the use effect of the equipment. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides an underground soil sampling device for collapsible loess exploration wells. Through the setting of a sampling piece, loess on the inner wall of the well can be extracted. Through the setting of a positioning piece, the protective shell during sampling can be locked to ensure the stability of the sampling mechanism during soil sampling. Through the setting of an electric cylinder, not only can the sampling piece be extended and driven to perform sampling work, but the positioning piece can also be extended and driven synchronously to perform sampling position positioning work. It has a good linkage function, thereby improving the smoothness of underground soil sampling, and solves the problems of the existing soil sampling equipment lacking continuity during operation and only being able to perform one-way sampling work, resulting in poor use effect.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an underground soil sampling device for collapsible loess exploration well, comprising a sampling mechanism and a lifting mechanism for lifting and lowering the sampling mechanism, the lifting mechanism comprising a gantry, a control box is installed on one side of the gantry, a winding machine is fixedly installed on the top of the gantry, the winding end of the winding machine is connected to the sampling mechanism through a rope, the sampling mechanism comprises a cylindrical protective shell, and an extension port is opened at the bottom of the protective shell;

[0008] The protective shell is provided with a sampling member with propulsion and rotation functions, a positioning member for positioning the sampling mechanism in the well, and an electric cylinder for driving the sampling member and the positioning member.

[0009] Preferably, a U-shaped frame is fixedly connected to the inner bottom of the protective shell, and the electric cylinder is fixed to the top of the U-shaped frame;

[0010] The sampling member comprises a connecting plate, a transversely driven electric guide rail member is arranged at the bottom of the connecting plate, and a soil shovel barrel is fixedly mounted at the driving end of the electric guide rail member.

[0011] Preferably, a driving motor for rotationally adjusting the electric guide rail member is fixedly connected to the bottom of the connecting plate, and an output shaft of the driving motor is fixedly connected to the electric guide rail member.

[0012] Preferably, the positioning member includes at least two guide blocks slidably connected to the inside of the U-shaped frame, and the bottoms of the two guide blocks are fixed to the top of the connecting plate, the tops of the two guide blocks are hinged with inclined positioning strips, and the outer surface of the protective shell is provided with two first movable openings, and the bottom ends of the two positioning strips extend to the outside of the protective shell through the first movable openings.

[0013] Preferably, the bottom ends of the two positioning strips are hinged with arc-shaped abutment plates, and the outer sides of the two arc-shaped abutment plates are fixedly connected with a plurality of positioning anchor rods;

[0014] The insides of the two first movable openings are fixedly connected with the limiting rods, and the insides of the two positioning strips are provided with strip guide openings, which are movably sleeved on the outer surfaces of the two limiting rods respectively.

[0015] Preferably, an anti-falling component is provided inside the protective shell, and the anti-falling component is connected to the bottom end of the rope through a hanging piece;

[0016] The anti-fall component is used to lock the sampling mechanism in mid-air by tightly contacting the anti-fall component with the inner wall of the well when the rope breaks.

[0017] Preferably, the anti-falling assembly includes a gravity block arranged at the top of the protective shell, the outer edge of the bottom of the gravity block is hinged with a plurality of inclined transmission frames, and the outer surface of the protective shell is provided with a plurality of second movable openings for the bottom end of the transmission frame to extend to the outside of the protective shell, the interiors of the plurality of second movable openings are fixedly connected with guide columns, the bottom ends of the plurality of transmission frames extend to the outside of the protective shell respectively through the plurality of second movable openings, the interiors of the plurality of transmission frames are provided with inclined strip-shaped movable openings, and the plurality of strip-shaped movable openings are respectively movably sleeved on the outer surfaces of the plurality of guide columns;

[0018] The bottom ends of the plurality of transmission frames are all hinged with arc-shaped friction plates, and the outer sides of the plurality of arc-shaped friction plates are all provided with protective patterns.

[0019] Preferably, the suspension member includes a connecting shaft slidably connected to the top of the protective shell, the bottom end of the connecting shaft extends into the interior of the protective shell and is fixedly connected to the top of the gravity block, the top end of the connecting shaft is connected to a hanging ring, and the rope is connected to the hanging ring through a hook.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides an underground soil taking device for collapsible loess exploration well, which has the following beneficial effects:

[0022] 1. The present invention provides a protective shell in the sampling mechanism to protect the sampling piece and the positioning piece to prevent landslide damage during the sampling process. The sampling piece can be used to extract loess from the inner wall of the well. The positioning piece can be used to lock the protective shell during sampling to ensure the stability of the sampling mechanism during soil sampling. The electric cylinder can not only extend and drive the sampling piece to perform sampling work, but also extend and drive the positioning piece synchronously to position the sampling position. It has a good linkage function, thereby improving the smoothness and safety of underground soil sampling.

[0023] 2. The present invention connects the gravity block with the rope by using a hanging part, so that when the rope breaks, the gravity block will move downward quickly, which can drive a plurality of inclined transmission frames to move in a fan shape. The fan-shaped movement of the plurality of transmission frames can be extended through a plurality of second movable openings. The arc-shaped friction plate is provided to be in close contact with the inner wall of the well to form an anti-falling work of the sampling mechanism, thereby solving the problem in the prior art that when the sampling device is sampling in the well, the rope breaks due to the special environment and long-term use, causing the sampling component to crash.

[0024] 3. The present invention allows the hollow ball to roll inside the hemispherical shell, thereby facilitating the hanging ring to tilt at different angles. A center of gravity block is provided at the inner bottom of the hollow ball, so that when the rope breaks or the hook is unhooked, and the sampling mechanism tilts at different angles, the center of gravity block can be moved vertically downward to keep the hanging ring in a vertical state, thereby facilitating subsequent staff to hang and find the hook through the hook, thereby solving the problem that when the rope breaks, the sampling mechanism tilts in the well, causing the hanging ring to tilt, thereby affecting subsequent hanging work and making it inconvenient to take the sampling mechanism out of the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the underground soil taking device for collapsible loess exploration well of the present invention;

[0026] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the middle protective shell;

[0027] Figure 3 For the present invention Figure 1 A schematic cross-sectional view of the middle protective shell;

[0028] Figure 4 For the present invention Figure 3 Schematic diagram of the combination of the sampling piece, the positioning piece and the anti-falling component;

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the combination of the sampling piece and the positioning piece;

[0030] Figure 6 For the present invention Figure 5 Bottom view of the combination of the central sampling piece and the positioning piece;

[0031] Figure 7 For the present invention Figure 4 Schematic diagram of the structure of the middle fall protection component;

[0032] Figure 8 For the present invention Figure 7 Structural diagram of the middle ring frame;

[0033] Fig. 9 For the present invention Figure 7 Schematic diagram of the combination of the anti-fall component and the suspension component;

[0034] Fig.10 For the present invention Fig. 9 Schematic cross-section of the suspension component.

[0035] In the figure: 1. Gantry; 2. Control box; 3. Winding machine; 4. Rope;

[0036] 5. Protective shell; 51. Electric cylinder; 52. U-shaped frame;

[0037] 53, sampling part; 531, connecting plate; 532, electric guide rail part; 533, driving motor; 534, soil shovel barrel;

[0038] 54, positioning member; 541, guide block; 542, positioning strip block; 543, arc-shaped abutment plate; 544, positioning anchor rod; 545, limiting rod;

[0039] 6. Anti-fall assembly; 61. Gravity block; 62. Transmission frame; 63. Guide column; 64. Arc friction plate; 65. Ring frame; 66. Blocking shaft;

[0040] 7. Suspension part; 71. Connecting shaft; 72. Hanging ring; 73. Hemispherical shell; 74. Hollow ball; 75. Center of gravity block; 76. Pin hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] See attached Figure 1-10 , an underground soil sampling device for collapsible loess exploration well, comprising a sampling mechanism and a lifting mechanism for lifting and lowering the sampling mechanism, the lifting mechanism comprising a gantry 1, a control box 2 is installed on one side of the gantry 1, a winding machine 3 is fixedly installed on the top of the gantry 1, and the winding end of the winding machine 3 is connected to the sampling mechanism through a rope 4, the sampling mechanism comprises a cylindrical protective shell 5, and an extension port is opened at the bottom of the protective shell 5;

[0044] The gantry 1 is used to set up the winding machine 3 and the sampling mechanism just above the loess exploration well. The winding machine 3 adopts the winding equipment in the prior art, which is composed of a forward and reverse motor, a drum and a rope 4. The motor drives the drum to rotate, which can drive the rope 4 to retract and unwind, and then drive the sampling mechanism to move up and down, so as to form a sampling work in the well;

[0045] The protective shell 5 is provided with a sampling member 53 with propulsion and rotation functions, a positioning member 54 for positioning the sampling mechanism in the well, and an electric cylinder 51 for driving the sampling member 53 and the positioning member 54;

[0046] By setting the protective shell 5 in the sampling mechanism, the sampling piece 53 and the positioning piece 54 are protected to prevent landslide damage during the sampling process. By setting the sampling piece 53, the loess on the inner wall of the well can be extracted. By setting the positioning piece 54, the protective shell 5 is locked during sampling to ensure the stability of the sampling mechanism when taking soil. By setting the electric cylinder 51, not only can the sampling piece 53 be extended and driven to perform sampling work, but the positioning piece 54 can also be extended and driven synchronously to position the sampling position. It has a good linkage function, thereby improving the smoothness of underground soil taking.

[0047] See attached Figures 3 to 6 , the inner bottom of the protective shell 5 is fixedly connected with a U-shaped frame 52, and the electric cylinder 51 is fixed to the top of the U-shaped frame 52;

[0048] The U-shaped frame 52 is provided to facilitate the electric cylinder 51 to be fixedly installed inside the protective shell 5;

[0049] The sampling member 53 includes a connecting plate 531, a transversely driven electric guide rail member 532 is provided at the bottom of the connecting plate 531, and a soil shovel barrel 534 is fixedly installed at the driving end of the electric guide rail member 532;

[0050] The telescopic end of the electric cylinder 51 is fixedly connected to the top of the connecting plate 531, so that the electric cylinder 51 can drive the sampling member 53 to perform telescopic movement to form a sampling or storage protection work;

[0051] The electric guide rail part 532 adopts the electric movable guide rail in the prior art, which is used to drive the soil shovel barrel 534 to move horizontally. When the soil shovel barrel 534 moves horizontally to the inner wall of the well, combined with continuous feeding, the soil shovel barrel 534 can be inserted into the loess on the inner wall of the well to perform sampling work.

[0052] See attached Figure 5 and Figure 6 A driving motor 533 for rotationally adjusting the electric guide rail member 532 is fixedly connected to the bottom of the connecting plate 531, and an output shaft of the driving motor 533 is fixedly connected to the electric guide rail member 532;

[0053] The driving motor 533 is connected to an external power source and a control switch. It is a forward and reverse motor and is configured using the connection method and coding method in the prior art. It is used to drive the telescopic end of the electric guide rail member 532 to rotate and adjust, thereby performing soil excavation work in different directions.

[0054] See attached Figure 5 and Figure 6The positioning member 54 includes at least two guide blocks 541 slidably connected to the inside of the U-shaped frame 52, and the bottoms of the two guide blocks 541 are fixed to the top of the connecting plate 531, and the tops of the two guide blocks 541 are hinged with inclined positioning strips 542. The outer surface of the protective shell 5 is provided with two first movable openings, and the bottom ends of the two positioning strips 542 extend to the outside of the protective shell 5 through the first movable openings;

[0055] By setting the guide block 541, not only the guiding property of the up and down movement of the connecting plate 531 is improved, but also the two inclined positioning strips 542 can be synchronously driven to move in a fan shape when the connecting plate 531 moves up and down. The two positioning strips 542 can be inserted into the loess of the inner wall of the well through the fan shape expansion, so as to form a self-locking operation of the protective shell 5, effectively transmit the extension driving force of the sampling piece 53, realize its linkage operation, form a synchronous operation of sampling and fixing, and thus improve the orderliness of sampling and fixing, without the need to control the sampling work and fixing work separately, and further improve the convenience of operation.

[0056] See attached Figure 5 and Figure 6 The bottom ends of the two positioning strips 542 are hinged with arc-shaped abutting plates 543, and the outer sides of the two arc-shaped abutting plates 543 are fixedly connected with a plurality of positioning anchor rods 544;

[0057] The arc-shaped abutting plate 543 is provided to abut against the inner wall of the well to ensure the stability of the protective shell 5 during the sampling process. A plurality of positioning anchor rods 544 are provided on the outer surface of the arc-shaped abutting plate 543 to further improve the locking degree between the arc-shaped abutting plate 543 and the inner wall of the well, thereby further improving the stability and smoothness of the sampling member 53 during sampling.

[0058] The insides of the two first movable openings are fixedly connected to the limiting rods 545, and the insides of the two positioning strips 542 are provided with strip guide openings, which are movably sleeved on the outer surfaces of the two limiting rods 545 respectively;

[0059] By setting the limiting rod 545, it is used to move inside the strip guide opening, and then the positioning strip 542 can be guided, thereby improving the convenience and smoothness of the fan-shaped movement of the inclined positioning strip 542 and improving the stability of the positioning strip 542 after the extension movement.

[0060] See attached Figure 3 , Figure 4 and Figures 7 to 9 , an anti-falling assembly 6 is arranged inside the protective shell 5, and the anti-falling assembly 6 is connected to the bottom end of the rope 4 through a hanging member 7;

[0061] The anti-fall component 6 is used to lock the sampling mechanism in mid-air by tightly contacting the anti-fall component 6 with the inner wall of the well when the rope 4 breaks.

[0062] By connecting the anti-fall component 6 with the rope 4 using the suspension part 7, it is not only convenient to drive the protective shell 5 to move up and down through the winding and unwinding movement of the rope 4 to form soil excavation work at different positions, but also conveniently when the rope 4 breaks and the protective shell 5 falls, the anti-fall component 6 can preferentially extend the movement, so that the protective shell 5 is stuck to the inner wall of the well, forming an anti-fall protection work.

[0063] Embodiment 2: Based on embodiment 1, the difference is that;

[0064] See attached Figure 3 , Figure 4 and Figures 7 to 9 The anti-falling assembly 6 includes a gravity block 61 arranged at the top of the protective shell 5, and the outer edge of the bottom of the gravity block 61 is hinged with a plurality of inclined transmission frames 62, and the outer surface of the protective shell 5 is provided with a plurality of second movable openings for the bottom end of the transmission frame 62 to extend to the outside of the protective shell 5, and the interiors of the plurality of second movable openings are fixedly connected with guide columns 63, and the bottom ends of the plurality of transmission frames 62 extend to the outside of the protective shell 5 through the plurality of second movable openings, and the interiors of the plurality of transmission frames 62 are provided with inclined strip movable openings, and the plurality of strip movable openings are movably sleeved on the outer surfaces of the plurality of guide columns 63;

[0065] The downward movement of the gravity block 61 can drive the plurality of inclined transmission frames 62 to move in a fan-shaped manner, and the fan-shaped movement of the plurality of transmission frames 62 can extend through the plurality of second movable openings to come into close contact with the inner wall of the well, thereby forming an anti-falling work of the sampling mechanism;

[0066] The guide column 63 is provided to improve the guiding performance of the extension drive of the transmission frame 62, and further improve the subsequent contact effect with the inner wall of the well;

[0067] A storage groove is provided at the bottom of the gravity block 61, so that when the gravity block 61 moves downward to the extreme position, the top of the electric cylinder 51 can be stored inside the gravity block 61;

[0068] The bottom ends of the plurality of transmission frames 62 are hinged with arc-shaped friction plates 64, and the outer sides of the plurality of arc-shaped friction plates 64 are provided with protective patterns;

[0069] The arc-shaped friction plate 64 is provided to be in close contact with the inner wall of the well. The protective pattern on the outer surface of the arc-shaped friction plate 64 increases the friction force of the close contact, thereby increasing the locking force between the sampling mechanism and the inner wall of the well, and further improving the anti-falling performance.

[0070] An annular frame 65 is provided inside the protective shell 5, and a plurality of blocking shafts 66 are slidably connected inside the annular frame 65. The top ends of the plurality of blocking shafts 66 are all provided with protrusions, and the bottom ends of the plurality of blocking shafts 66 are all slidably penetrated through the bottom of the protective shell 5. The annular frame 65 is fixedly connected to the gravity block 61 through a connecting frame.

[0071] The annular frame 65 is fixedly connected to the gravity block 61 by a connecting frame, so that when the gravity block 61 falls downward, the annular frame 65 can be driven to move downward synchronously, and the downward movement of the annular frame 65 can drive a plurality of blocking shafts 66 to move downward, thereby blocking the extended sampling member 53, thereby solving the problem that during the sampling process, due to the collapse of the well, the collapse of the loess easily impacts the extended sampling member 53, thereby causing the connection position of the sampling member 53 and the sampling member 53 itself to break;

[0072] A plurality of blocking shafts 66 are connected to the annular frame 65 in a sliding manner, so that when the sampling member 53 is in an extended sampling state, the blocking shaft 66 at that position will not move downward, thereby avoiding the problem of the blocking shaft 66 moving downward and causing damage to the sampling member 53.

[0073] Embodiment 3: Based on embodiment 1, the difference is that;

[0074] See attached Fig. 9 and Fig.10 The hanging member 7 includes a connecting shaft 71 slidably connected to the top of the protective shell 5, the bottom end of the connecting shaft 71 extends to the inside of the protective shell 5, and is fixedly connected to the top of the gravity block 61, and the top of the connecting shaft 71 is connected to a hanging ring 72, and the rope 4 is connected to the hanging ring 72 through a hook;

[0075] The hanging ring 72 is fixedly connected to the gravity block 61 through the connecting shaft 71, so that when the rope 4 is suspended and connected to the hanging ring 72 through the hook, the protective shell 5 can move downward by its own gravity, so that the gravity block 61 is located above the protective shell 5. If the rope 4 breaks or the hook is unhooked, the gravity block 61 can move downward at high speed by its own gravity, so that the anti-fall component 6 can be extended and driven, and the inner top of the protective shell 5 can also be provided with a spring group for pressing the gravity block 61 downward, so as to increase the speed of the downward movement of the gravity block 61, so that the downward movement speed of the gravity block 61 is greater than the overall downward movement speed of the protective shell 5;

[0076] The top of the connecting shaft 71 is fixedly connected with a hemispherical shell 73, a hollow ball 74 is rotatably arranged inside the hemispherical shell 73, the hanging ring 72 is fixedly connected with the hollow ball 74, and a center of gravity block 75 is arranged at the inner bottom of the hollow ball 74;

[0077] The hollow ball 74 rolls inside the hemispherical shell 73, so that the hanging ring 72 can be tilted at different angles. The center of gravity block 75 is provided at the inner bottom of the hollow ball 74. When the rope 4 breaks or the hook is unhooked, and the sampling mechanism is tilted at different angles, the center of gravity block 75 can be moved vertically downward to keep the hanging ring 72 in a vertical state, so that it is convenient for subsequent staff to hang and find the hook through the hook, and solves the problem that when the rope 4 breaks, the sampling mechanism is tilted in the well, which causes the hanging ring 72 to be tilted, thereby affecting the subsequent hanging work and making it inconvenient to take the sampling mechanism out of the well.

[0078] The connecting shaft 71 has a latch hole 76 formed inside, and the top of the protective shell 5 is slidably connected to a T-shaped latch block for inserting into the latch hole 76. The T-shaped latch block is not marked in the figure, and the details can be referred to in the attached drawing. Figure 2 ;

[0079] The opening of the latch hole 76 facilitates the insertion of the T-shaped latch block. By inserting the T-shaped latch block into the interior of the latch hole 76, the connecting shaft 71 can be locked to prevent the anti-fall component 6 from expanding when the protective shell 5 is stored on the ground during sampling. When sampling is performed, it is only necessary to move the T-shaped latch block out, thereby improving the convenience of its operation and subsequent management.

[0080] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0081] 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. An underground soil sampling device for collapsible loess exploration wells, comprising a sampling mechanism and a lifting mechanism for lifting and lowering the sampling mechanism, the lifting mechanism comprising a gantry (1), a control box (2) is installed on one side of the gantry (1), a winding machine (3) is fixedly installed on the top of the gantry (1), and the winding end of the winding machine (3) is connected to the sampling mechanism through a rope (4), characterized in that: The sampling mechanism comprises a cylindrical protective shell (5), and an extension opening is provided at the bottom of the protective shell (5); The protective shell (5) is provided with a sampling piece (53) having propulsion and rotation functions, a positioning piece (54) for positioning a sampling mechanism located in the well, and an electric cylinder (51) for driving the sampling piece (53) and the positioning piece (54).

2. The underground soil taking device for collapsible loess exploration well according to claim 1 is characterized in that: The inner bottom of the protective shell (5) is fixedly connected to a U-shaped frame (52), and the electric cylinder (51) is fixed to the top of the U-shaped frame (52); The sampling member (53) comprises a connecting plate (531), a transversely driven electric guide rail member (532) is arranged at the bottom of the connecting plate (531), and a soil shovel barrel (534) is fixedly mounted at the driving end of the electric guide rail member (532).

3. The underground soil taking device for collapsible loess exploration well according to claim 2, characterized in that: A driving motor (533) for rotationally adjusting the electric guide rail member (532) is fixedly connected to the bottom of the connecting plate (531), and an output shaft of the driving motor (533) is fixedly connected to the electric guide rail member (532).

4. The underground soil taking device for collapsible loess exploration well according to claim 2, characterized in that: The positioning member (54) comprises at least two guide blocks (541) slidably connected to the inside of the U-shaped frame (52), and the bottoms of the two guide blocks (541) are fixed to the top of the connecting plate (531), and the tops of the two guide blocks (541) are hinged with inclined positioning strips (542), and the outer surface of the protective shell (5) is provided with two first movable openings, and the bottom ends of the two positioning strips (542) extend to the outside of the protective shell through the first movable openings.

5. The underground soil taking device for collapsible loess exploration well according to claim 4, characterized in that: The bottom ends of the two positioning strips (542) are both hinged with arc-shaped abutting plates (543), and the outer sides of the two arc-shaped abutting plates (543) are both fixedly connected with a plurality of positioning anchor rods (544); The interiors of the two first movable openings are fixedly connected to the limiting rods (545), and the interiors of the two positioning strips (542) are provided with strip guide openings, which are movably sleeved on the outer surfaces of the two limiting rods (545).

6. The underground soil taking device for collapsible loess exploration well according to claim 1, characterized in that: An anti-falling component (6) is arranged inside the protective shell (5), and the anti-falling component (6) is connected to the bottom end of the rope (4) through a hanging member (7); The anti-fall component (6) is used to lock the sampling mechanism in mid-air by tightly contacting the anti-fall component with the inner wall of the well when the rope (4) breaks.

7. The underground soil taking device for collapsible loess exploration well according to claim 6, characterized in that: The anti-falling component (6) comprises a gravity block (61) arranged at the top of the protective shell (5), the outer edge of the bottom of the gravity block (61) is hinged with a plurality of inclined transmission frames (62), and the outer surface of the protective shell (5) is provided with a plurality of second movable openings for the bottom end of the transmission frame (62) to extend to the outside of the protective shell (5), the interiors of the plurality of second movable openings are fixedly connected with guide columns (63), the bottom ends of the plurality of transmission frames (62) are respectively extended to the outside of the protective shell (5) through the plurality of second movable openings, the interiors of the plurality of transmission frames (62) are provided with inclined strip movable openings, and the plurality of strip movable openings are respectively movably sleeved on the outer surfaces of the plurality of guide columns (63); The bottom ends of the plurality of transmission frames (62) are hingedly connected with arc-shaped friction plates (64), and the outer sides of the plurality of arc-shaped friction plates (64) are provided with protective patterns.

8. The underground soil taking device for collapsible loess exploration well according to claim 7, characterized in that: The hanging member (7) comprises a connecting shaft (71) slidably connected to the top of the protective shell (5), the bottom end of the connecting shaft (71) extends into the interior of the protective shell (5) and is fixedly connected to the top of the gravity block (61), the top end of the connecting shaft (71) is connected to a hanging ring (72), and the rope (4) is connected to the hanging ring (72) via a hook.

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