Sampling equipment for hydrogeological survey and use method thereof

Abstract

The invention relates to the technical field of geological survey sampling, in particular to sampling equipment for hydrogeological survey and a using method thereof.The sampling equipment comprises a sampling barrel body and a positioning sleeve, a handle end is fixedly arranged at the upper end of the sampling barrel body, a conical head is arranged at the lower end of the positioning sleeve, and connecting blocks are symmetrically arranged at the two ends of the upper side of the positioning sleeve; and a rotary pedal is rotationally mounted on the connecting block. A positioning sleeve is arranged and is vertically inserted into soil in advance, four groups of first hinge rods and anchor rods are opened in the soil by treading a rotary pedal downwards to achieve an anchoring effect, so that the positioning sleeve is not easy to move, then a sampling barrel body can be inserted into the positioning sleeve for soil sampling operation, and two groups of threaded blocks can be combined in the process; the positioning sleeve can be in threaded fit with the external threads through the threaded groove in the surface, so that the positioning sleeve can be continuously screwed into the soil by rotating the handle end, and compared with a mode of directly applying force to insert into the soil, the sampling barrel body can be conveniently inserted into a deeper position in a labor-saving manner.

Description

Technical Field

[0001] The invention relates to the technical field of geological survey sampling, in particular to a sampling device for hydrogeological survey and a use method thereof. Background Art

[0002] Hydrogeological survey mainly uses different survey methods to understand the causes, distribution and movement of groundwater and surface water, so as to achieve the purpose of rationally exploiting and utilizing water resources and correctly designing and constructing foundation and piling projects.

[0003] Hydrogeological surveys require not only groundwater samples but also soil samples to understand soil moisture content, stratification, etc. In field drilling work, if the soil is not of high hardness, manual sampling tubes are usually used for sampling. The basic structure of the tube is composed of a tube and a handle. The handle is pressed down to insert the tube into the soil to take soil. However, this process is usually laborious, and due to the sampling depth requirements, the length of the sampling tube is also different. When the handle of the sampling tube is higher than the waist, it is difficult to press down the handle. At the same time, the deeper the sampling tube is inserted into the soil, the more laborious it is. And because the sampling tube itself does not have a guide structure, its verticality into the soil depends entirely on manual adjustment. Summary of the invention

[0004] The object of the present invention is to provide a sampling device for hydrogeological survey and a method of using the same, so as to solve the problem that the existing manual sampling tube mentioned in the above background technology is laborious to use and has no guiding structure.

[0005] To achieve the above object, the present invention provides the following technical solutions: a sampling device for hydrogeological survey and a method of using the same, comprising a sampling barrel body and a positioning sleeve, wherein the upper end of the sampling barrel body is fixedly provided with a handle end, the lower end of the positioning sleeve is provided with a cone head, the upper two ends of the positioning sleeve are symmetrically provided with connecting blocks, and a rotating pedal is rotatably installed on the connecting block;

[0006] Vertical rods are symmetrically slidably arranged on both sides of the positioning sleeve, the inner end of the rotating pedal is connected to the upper end of the vertical rod through a connecting assembly, the lower sliding sleeve of the positioning sleeve is provided with a guide ring, and the lower ends of the two groups of vertical rods are fixedly connected to the guide ring;

[0007] The surface of the positioning sleeve is provided with a circular array of movable grooves, the upper end of the guide ring is hinged with four groups of first hinged rods in a circular array, the upper end of the first hinged rod is fixed with an anchor rod, the upper inner wall of the movable groove is hinged with a second hinged rod, and the lower end of the second hinged rod is hingedly connected to the upper end of the first hinged rod;

[0008] The upper end of the positioning sleeve is provided with two groups of threaded blocks through a switch assembly, a limiting assembly is provided on the upper side of the threaded blocks, the inner sides of the two groups of threaded blocks are provided with external threads, and the outer wall of the sampling tube body is provided with a thread groove adapted to the external threads.

[0009] Preferably, the upper surface of the rotating pedal is provided with anti-slip grooves, and the lower surface of the rotating pedal is provided with multiple groups of conical protrusions.

[0010] Preferably, the connecting assembly includes a connecting rod, the inner end of the rotating pedal is fixedly provided with a connecting rod, the end of the connecting rod is fixedly connected to one end of a connecting rope, the other end of the connecting rope is fixedly connected to the upper end of the vertical rod, the upper end of the positioning sleeve is rotatably mounted with a first guide wheel, the inner side of the connecting block is rotatably mounted with a second guide wheel, and the connecting rope passes around the upper side of the first guide wheel from the lower side of the second guide wheel.

[0011] Preferably, the end of the anchor rod is in an arc shape, and the first hinged rod, the anchor rod and the second hinged rod are in a Y shape.

[0012] Preferably, guide grooves are symmetrically provided at the front and rear ends of the positioning sleeve, guide plates are slidably arranged in the guide grooves, a movable ring is provided on the upper sliding sleeve of the positioning sleeve, the lower end of the movable ring is fixedly connected to the upper ends of the two groups of guide plates, and fixed pedals are symmetrically arranged on both sides of the movable ring.

[0013] Preferably, the switch assembly includes a guide frame, guide frames are symmetrically arranged on both sides of the upper end of the positioning sleeve, a screw is rotatably installed in the guide frame, a knob is fixedly connected to the outer end of the screw, a screw sleeve is connected to the screw via a threaded sleeve, a guide block is slidably arranged in the guide frame, the screw sleeve is fixedly installed in the guide block, and the upper end of the guide block is fixedly connected to the lower end of the threaded block.

[0014] Preferably, the threaded block is in a semicircular shape, and the inner diameter of the threaded block is matched with the inner diameter of the positioning sleeve.

[0015] Preferably, the limit assembly includes a limit groove and a limit block, the upper surface of one group of threaded blocks is symmetrically provided with the limit groove, and the upper end of the other group of threaded blocks is rotatably installed with a limit block, the limit block is adapted to the limit groove, and the outer wall of the limit block is provided with a finger groove.

[0016] Preferably, the cone head at the lower end of the positioning sleeve is first inserted straight into the soil, and the fixed pedal is stepped down until the positioning sleeve is inserted into the soil, and the rotating pedal is opened oppositely, and the rotating pedal is pressed against the ground by stepping on the rotating pedal, so that the connecting assembly drives the first hinged rod and the anchor rod to open and anchor with the second hinged rod in the soil, and then the sampling tube body can be inserted into the positioning sleeve. After the lower end of the sampling tube body is inserted into the soil, the two groups of threaded blocks are closed by the switch assembly, and the limit assembly is opened, and then the sampling tube body can be rotated to cooperate with the external thread on the inner side of the threaded block through the threaded groove on its surface. After the soil is taken, the two groups of threaded blocks are opened first, and then the sampling tube body is taken out, and finally the positioning sleeve can be pulled up to take out the equipment. At the same time, the first hinged rod and the anchor rod will turn over the soil, and the pit can be filled by crushing the soil.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a positioning sleeve, which is vertically inserted into the soil in advance, and by stepping on the rotating pedal, the four groups of first hinged rods and the anchor rod are opened in the soil to obtain an anchoring effect, so that the positioning sleeve is not easy to move, and then the sampling tube body can be inserted into the positioning sleeve to perform soil sampling operations. During the process, the two groups of threaded blocks can be combined, so that the positioning sleeve can be threadedly matched with the external thread through the threaded groove on the surface, so that the positioning sleeve can be continuously screwed into the soil by rotating the handle end. Compared with the method of directly applying force to insert into the soil, it is convenient to insert the sampling tube body into a deeper position with less effort. At the same time, due to the limitation and guidance of the positioning sleeve, during the continuous entry into the soil, the sampling tube body will not tilt after entering the soil due to different force angles, so that the sampling work can be well completed. In addition, after the sampling is completed, the sampling tube body can be directly pulled out by opening the threaded block, and there is no need to take it out again through the thread action. At the same time, when the positioning sleeve is pulled out, the first hinged rod and the anchor rod will crush and turn up the soil, so that it is convenient to backfill the pit by crushing the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic front view of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the positioning sleeve in the present invention in use state;

[0021] Figure 3 It is a schematic structural diagram of the folded state of the positioning sleeve in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the positioning sleeve in the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of a local structure in the present invention;

[0024] Figure 6 It is a schematic diagram of the structural cross section of the positioning sleeve in the present invention;

[0025] Figure 7 It is a schematic diagram of the structure expansion of the first hinged rod, the anchor rod and the second hinged rod in the present invention;

[0026] Figure 8 It is a structural schematic diagram of the movable ring in the present invention;

[0027] Fig. 9 It is a schematic diagram of the structural cross section of the switch assembly in the present invention;

[0028] Fig.10 It is a schematic structural diagram of the second guide wheel in the present invention.

[0029] In the figure: 1. sampling tube body; 2. positioning sleeve; 3. handle end; 4. cone head; 5. connecting block; 6. rotating pedal; 7. connecting rod; 8. connecting rope; 9. first guide wheel; 10. second guide wheel; 11. vertical rod; 12. guide ring; 13. movable groove; 14. first hinged rod; 15. anchor rod; 16. second hinged rod; 17. guide groove; 18. guide plate; 19. movable ring; 20. fixed pedal; 21. guide frame; 22. screw rod; 23. knob; 24. screw sleeve; 25. guide block; 26. threaded block; 27. limit groove; 28. limit block; 29. ​​finger groove; 30. external thread; 31. threaded groove. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-10 , an embodiment provided by the present invention: a sampling device for hydrogeological survey and a method of using the same, comprising a sampling barrel body 1 and a positioning sleeve 2, the sampling barrel body 1 is an existing mature technology, and except for the threaded groove 31 on the outer side, the rest of the structure is the same as the prior art, the upper end of the sampling barrel body 1 is fixedly provided with a handle end 3, the lower end of the positioning sleeve 2 is provided with a cone head 4, the upper two ends of the positioning sleeve 2 are symmetrically provided with connecting blocks 5, and a rotating pedal 6 is rotatably installed on the connecting block 5;

[0032] Vertical rods 11 are symmetrically slidably arranged on both sides of the positioning sleeve 2. A groove for the vertical rods 11 to slide is provided on the surface of the positioning sleeve 2. At the same time, the vertical rods 11 do not protrude from the outer surface of the positioning sleeve 2 when they are in the groove. The inner end of the rotating pedal 6 is connected to the upper end of the vertical rod 11 through a connecting assembly. A guide ring 12 is provided on the lower sliding sleeve of the positioning sleeve 2. The lower ends of the two sets of vertical rods 11 are fixedly connected to the guide ring 12. Figure 2 and Figure 3 As shown, the outer diameter of the guide ring 12 is consistent with the outer diameter of the positioning sleeve 2, and the lower side of the positioning sleeve 2 has a space for the guide ring 12 to move vertically;

[0033] The surface of the positioning sleeve 2 is provided with a circular array of movable grooves 13, the upper end of the guide ring 12 is hinged with four groups of first hinged rods 14 in a circular array, the upper end of the first hinged rod 14 is fixed with an anchor rod 15, the upper inner wall of the movable groove 13 is hinged with a second hinged rod 16, and the lower end of the second hinged rod 16 is hingedly connected to the upper end of the first hinged rod 14;

[0034] The upper end of the positioning sleeve 2 is provided with two sets of thread blocks 26 through the switch assembly, and the upper side of the thread blocks 26 is provided with a limit assembly. The inner sides of the two sets of thread blocks 26 are provided with external threads 30, and the outer wall of the sampling tube body 1 is provided with a thread groove 31 adapted to the external threads 30. Fig. 9 As shown, the external threads 30 in the two sets of thread blocks 26 are continuously formed and matched with the thread grooves 31 on the surface of the sampling tube body 1. At the same time, the thread grooves 31 on the surface of the sampling tube body 1 extend from the upper side of the sampling tube body 1 to the lower side. Figure 1 As shown, after the sampling tube body 1 is inserted into the positioning sleeve 2 and its end exceeds the opening of the cone head 4, the lower side of the thread groove 31 on the sampling tube body 1 should be just on the upper side of the thread block 26, that is, the portion of the sampling tube body 1 located between the thread block 26 and the cone head 4 does not have the thread groove 31 and should be a smooth outer wall.

[0035] Furthermore, the upper surface of the rotating pedal 6 is provided with anti-slip grooves, and the lower surface of the rotating pedal 6 is provided with multiple groups of cone-shaped protrusions.

[0036] like Figure 3 As shown, the anti-skid pattern provides an anti-skid effect when stepped on, increasing stability during use, and the conical protrusions are used to penetrate into the soil after the rotating pedal 6 is flattened to the soil surface by stepping on it, thereby further increasing stability and avoiding repeated stepping, which causes the rotating pedal 6 to be forced to drive the positioning sleeve 2 to move.

[0037] Furthermore, the connecting assembly includes a connecting rod 7, the inner end of the rotating pedal 6 is fixedly provided with the connecting rod 7, the end of the connecting rod 7 is fixedly connected to one end of a connecting rope 8, the connecting rope 8 can be a high-strength and flexible rope such as a steel rope, the other end of the connecting rope 8 is fixedly connected to the upper end of the vertical rod 11, the upper end of the positioning sleeve 2 is rotatably mounted with a first guide wheel 9, the inner side of the connecting block 5 is rotatably mounted with a second guide wheel 10, the connecting rope 8 passes around the upper side of the first guide wheel 9 from the lower side of the second guide wheel 10, and the surfaces of the first guide wheel 9 and the second guide wheel 10 are both provided with annular rope grooves, which can limit the connecting rope 8 and prevent dislocation.

[0038] like Figures 2 to 6 As shown, this structure allows the connecting rod 7 to be lifted up when the rotating pedal 6 rotates, so that the end of the connecting rope 8 is pulled, and the connecting rope 8 is guided along the first guide wheel 9 and the second guide wheel 10, and pulls the vertical rod 11 upward, thereby moving the guide ring 12 on the lower side upward, causing the four groups of first hinged rods 14 and anchor rods 15 to open, so that the anchoring effect can be obtained in the soil by opening.

[0039] Furthermore, the end of the anchor rod 15 is in an arc shape, and the first hinge rod 14, the anchor rod 15 and the second hinge rod 16 are in a Y shape.

[0040] like Figure 7 As shown, the arc-shaped end of the anchor rod 15 is convenient for it to penetrate into the soil when it is opened in the soil. At the same time, the Y-shaped structure makes the positioning sleeve 2 have obvious resistance when moving upward, which not only increases the anchoring effect, but also when pulled out of the soil, the anchor rod 15 will lift the soil, thereby facilitating the backfilling of the pit by crushing the soil.

[0041] Furthermore, guide grooves 17 are symmetrically provided at the front and rear ends of the positioning sleeve 2, and guide plates 18 are slidably provided in the guide grooves 17. The upper sliding sleeve of the positioning sleeve 2 is provided with a movable ring 19, and the lower end of the movable ring 19 is fixedly connected to the upper ends of the two groups of guide plates 18. Fixed pedals 20 are symmetrically provided on both sides of the movable ring 19.

[0042] like Figure 3 , Figure 4 and Figure 8As shown, the structure is used to insert or remove the positioning sleeve 2 into the soil by stepping on and pulling the fixed pedal 20. At the same time, when the fixed pedal 20 is stepped on, the fixed pedal 20 will press against the connecting block 5 through the movable ring 19 to apply force downward to the positioning sleeve 2, so that it can enter the soil. At the same time, the guide plate 18 will press against the upper end of the guide ring 12, so that when the positioning sleeve 2 enters the soil, the guide ring 12 will not be forced to move upward, causing the first hinge rod 14 and the anchor rod 15 to automatically open. When the rotating pedal 6 is operated to open, the guide plate 18 can move upward along the guide groove 17, and the fixed pedal 20 can drive the movable ring 19 to move upward. In this way, when taking soil, the fixed pedal 20 can be pulled so that the movable ring 19 presses against the knob 23 to apply force upward to the positioning sleeve 2. In addition, as shown in FIG. Figure 3 As shown, grooves are provided on the inner sides of both ends of the movable ring 19, and the size of the grooves is larger than the diameter of the first guide wheel 9, so as to ensure that the movable ring 19 will not interfere with the first guide wheel 9 and the connecting rope 8 when moving up and down.

[0043] Furthermore, the switch assembly includes a guide frame 21, and the guide frames 21 are symmetrically arranged on both sides of the upper end of the positioning sleeve 2, a screw rod 22 is rotatably installed in the guide frame 21, a knob 23 is fixedly connected to the outer end of the screw rod 22, a screw sleeve 24 is connected to the screw rod 22 through a threaded sleeve, a guide block 25 is slidably arranged in the guide frame 21, the screw sleeve 24 is fixedly installed in the guide block 25, and the upper end of the guide block 25 is fixedly connected to the lower end of the threaded block 26.

[0044] like Figure 5 and Fig. 9 As shown, the switch assembly is used to open and close the thread block 26, so that the thread block 26 can be opened and closed, so that the external thread 30 can be matched with or separated from the thread groove 31, so as to facilitate the sampling tube body 1 to be put into and taken out of the ground.

[0045] Furthermore, the threaded block 26 is in a semicircular shape, and the inner diameter of the threaded block 26 is matched with the inner diameter of the positioning sleeve 2 .

[0046] like Figure 1 , Figure 5 and Fig. 9 As shown, this structure enables the external thread 30 on the inner side of the thread block 26 to be well matched with the thread groove 31 on the surface of the sampling tube body 1, thereby ensuring the accuracy and stability of the threaded connection.

[0047] Furthermore, the limiting assembly includes a limiting groove 27 and a limiting block 28. The upper surface of one group of threaded blocks 26 is symmetrically provided with the limiting groove 27, and the upper end of the other group of threaded blocks 26 is rotatably installed with the limiting block 28. The limiting block 28 is adapted to the limiting groove 27, and the outer wall of the limiting block 28 is provided with a finger groove 29.

[0048] like Fig. 9 and Fig.10The limit groove 27 is expanded to facilitate the insertion of the end of the limit block 28. At the same time, the limit block 28 can limit the lateral opening of the two groups of threaded blocks 26. This can increase the stability of the two groups of threaded blocks 26 when they are closed, and avoid the different angles when the sampling tube body 1 is rotated and force is applied, resulting in the two groups of threaded blocks 26 being pried by force and the upper side being stretched and damaged. The finger groove 29 can be easily opened by pressing the finger.

[0049] Furthermore, the cone head 4 at the lower end of the positioning sleeve 2 is first inserted straight into the soil, and the fixed pedal 20 is stepped down until the positioning sleeve 2 is inserted into the soil, and the rotating pedal 6 is opened oppositely, and the rotating pedal 6 is pressed against the ground by stepping on the rotating pedal 6, so that the connecting assembly drives the first hinged rod 14 and the anchor rod 15 to open and anchor with the second hinged rod 16 in the soil, and then the sampling tube body 1 can be inserted into the positioning sleeve 2. After the lower end of the sampling tube body 1 is inserted into the soil, the two groups of threaded blocks 26 are closed by the switch assembly, and the limit assembly is opened, and then the sampling tube body 1 can be rotated to cooperate with the external thread 30 on the inner side of the threaded block 26 through the threaded groove 31 on its surface to enter the soil. After the soil is taken, the two groups of threaded blocks 26 are opened first, and then the sampling tube body 1 is taken out, and finally the positioning sleeve 2 can be pulled up to take out the equipment. At the same time, the first hinged rod 14 and the anchor rod 15 will turn over the soil, and the pit can be filled by crushing the soil.

[0050] Working principle: When in use, first insert the cone head 4 at the lower end of the positioning sleeve 2 straight into the soil at the location to be sampled, then press down and step on the fixed pedal 20 so that the fixed pedal 20 uses the movable ring 19 to press the positioning sleeve 2 down and make it penetrate into the soil. After the connecting block 5 is flat on the soil surface, the rotating pedals 6 are opened and stepped on flat so that the two sets of rotating pedals 6 are in contact with the ground. In this process, when the rotating pedals 6 rotate, they will drive the connecting rod 7 to move upward, and when the connecting rod 7 moves upward, it will be guided by the first guide wheel 9 and the second guide wheel 10, and the vertical rod 11 will be pulled upward by the connecting rope 8, and the vertical rod 11 will pull the guide ring 12 upward. When the guide ring 12 moves upward, the first hinged rod 14 arranged in the circular array will rotate and deform with the second hinged rod 16. Figure 7 The shape shown, at the same time, the first hinged rod 14 and the anchor rod 15 and the second hinged rod 16 will expand in the soil to achieve an anchoring effect to ensure the stability of the positioning sleeve 2;

[0051] The screw 22 is then rotated to move in a horizontal direction, and the guide frame 21 which is threaded on the screw 22 drives the screw sleeve 24 to move horizontally in the guide frame 21, so that the threaded block 26 can be translated. The two sets of threaded blocks 26 are moved closer to each other by rotating the knob 23 until the two sets of threaded blocks 26 are fitted together. The two sets of limiting blocks 28 are rotated in turn so that the ends of the limiting blocks 28 are buckled in the limiting grooves 27 on the other set of threaded blocks 26. The sampling tube body 1 can be randomly rotated by holding the handle end 3, so that the threaded grooves 31 cooperate with the external threads 30 in the two sets of threaded blocks 26 to perform threading, so that the sampling tube body 1 can be rotated in a horizontal direction. By continuously rotating the handle end 3, the sampling tube body 1 can be rotated deep into the soil, and the threaded action is used to facilitate the sampling tube body 1 to enter the soil. When the sampling tube body 1 is inserted into the soil by using the threaded action, the rotating pedal 6 is kept pressed. In this way, the dead weight and the anchoring effect of the first hinged rod 14 and the anchor rod 15 opened in the soil can be used to reduce the reaction force when the sampling tube body 1 enters the soil, so as to avoid the positioning sleeve 2 being lifted up and causing the sampling tube body 1 to be difficult to enter the soil. After the sampling tube body 1 has finished taking the soil, the two sets of knobs 23 can be rotated in sequence to allow the two sets of threaded blocks 26 to open towards each other. At this time, the sampling tube body 1 can be directly taken out of the soil by pulling the handle end 3, and finally the positioning sleeve 2 is pulled out and shaken to take out the positioning sleeve 2. At the same time, the first hinged rod 14 and the anchor rod 15 will have the effect of loosening and turning the soil, so as to facilitate the backfilling of the turned up broken soil into the sampling pit. The above is the entire working principle of the present invention.

[0052] In the description of the present application, it should be understood that the terms "front", "rear", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0053] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A sampling device for hydrogeological survey, characterized in that: The invention comprises a sampling tube body (1) and a positioning sleeve (2), wherein a handle end (3) is fixedly provided at the upper end of the sampling tube body (1), a cone head (4) is provided at the lower end of the positioning sleeve (2), connecting blocks (5) are symmetrically provided at both ends of the upper side of the positioning sleeve (2), and a rotating pedal (6) is rotatably mounted on the connecting block (5); Vertical rods (11) are symmetrically slidably arranged on both sides of the positioning sleeve (2); the inner end of the rotating pedal (6) is connected to the upper end of the vertical rod (11) through a connecting assembly; the lower sliding sleeve of the positioning sleeve (2) is provided with a guide ring (12); the lower ends of the two groups of vertical rods (11) are fixedly connected to the guide ring (12); The surface of the positioning sleeve (2) is provided with a circular array of movable grooves (13); the upper end of the guide ring (12) is hinged with four groups of first hinged rods (14) in a circular array; the upper end of the first hinged rod (14) is fixedly provided with an anchor rod (15); the upper inner wall of the movable groove (13) is hinged with a second hinged rod (16); the lower end of the second hinged rod (16) is hingedly connected to the upper end of the first hinged rod (14); The upper end of the positioning sleeve (2) is provided with two groups of threaded blocks (26) through a switch assembly, a limiting assembly is provided on the upper side of the threaded blocks (26), the inner sides of the two groups of threaded blocks (26) are provided with external threads (30), and the outer wall of the sampling tube body (1) is provided with a thread groove (31) adapted to the external threads (30).

2. A sampling device for hydrogeological survey according to claim 1, characterized in that: The upper surface of the rotating pedal (6) is provided with anti-slip grooves, and the lower surface of the rotating pedal (6) is provided with a plurality of groups of conical protrusions.

3. A sampling device for hydrogeological survey according to claim 1, characterized in that: The connecting assembly comprises a connecting rod (7), the inner end of the rotating pedal (6) is fixedly provided with the connecting rod (7), the end of the connecting rod (7) is fixedly connected to one end of a connecting rope (8), the other end of the connecting rope (8) is fixedly connected to the upper end of the vertical rod (11), the upper end of the positioning sleeve (2) is rotatably mounted with a first guide wheel (9), the inner side of the connecting block (5) is rotatably mounted with a second guide wheel (10), and the connecting rope (8) passes around the upper side of the first guide wheel (9) from the lower side of the second guide wheel (10).

4. A sampling device for hydrogeological survey according to claim 1, characterized in that: The end of the anchor rod (15) is in an arc shape, and the first hinge rod (14), the anchor rod (15) and the second hinge rod (16) are in a Y shape.

5. The sampling device for hydrogeological survey according to claim 1, characterized in that: The front and rear ends of the positioning sleeve (2) are symmetrically provided with guide grooves (17), a guide plate (18) is slidably arranged in the guide groove (17), the upper sliding sleeve of the positioning sleeve (2) is provided with a movable ring (19), the lower end of the movable ring (19) is fixedly connected to the upper ends of the two groups of guide plates (18), and fixed pedals (20) are symmetrically arranged on both sides of the movable ring (19).

6. A sampling device for hydrogeological survey according to claim 1, characterized in that: The switch assembly comprises a guide frame (21), the guide frames (21) are symmetrically arranged on both sides of the upper end of the positioning sleeve (2), a screw rod (22) is rotatably installed in the guide frame (21), the outer end of the screw rod (22) is fixedly connected to a knob (23), a screw sleeve (24) is connected to the screw rod (22) through a thread sleeve, a guide block (25) is slidably arranged in the guide frame (21), the screw sleeve (24) is fixedly installed in the guide block (25), and the upper end of the guide block (25) is fixedly connected to the lower end of the thread block (26).

7. A sampling device for hydrogeological survey according to claim 1, characterized in that: The threaded block (26) is in the shape of a semicircular ring, and the inner diameter of the threaded block (26) is matched with the inner diameter of the positioning sleeve (2).

8. The sampling device for hydrogeological survey according to claim 1, characterized in that: The limiting assembly comprises a limiting groove (27) and a limiting block (28); the limiting grooves (27) are symmetrically provided on the upper surfaces of one group of the threaded blocks (26); the limiting blocks (28) are rotatably installed on the upper ends of the other group of the threaded blocks (26); the limiting blocks (28) are matched with the limiting grooves (27); and the outer walls of the limiting blocks (28) are provided with finger grooves (29).

9. A method for using a hydrogeological survey sampling device according to any one of claims 1 to 8, characterized in that: First, the cone head (4) at the lower end of the positioning sleeve (2) is inserted straight into the soil, and the fixed pedal (20) is stepped down until the positioning sleeve (2) is embedded in the soil, and then the rotating pedal (6) is opened oppositely, and the rotating pedal (6) is pressed against the ground, so that the connecting assembly drives the first hinged rod (14) and the anchor rod (15) to open and anchor with the second hinged rod (16) in the soil, and then the sampling tube body (1) can be inserted into the positioning sleeve (2), and after the sampling tube body (1) is lowered, After the end is inserted into the soil, the two groups of threaded blocks (26) are closed by the switch assembly, and the limit assembly is opened. Then, the sampling tube body (1) can be rotated to cooperate with the external thread (30) inside the threaded block (26) through the thread groove (31) on its surface. After the soil is taken, the two groups of threaded blocks (26) are opened first, and then the sampling tube body (1) is taken out. Finally, the positioning sleeve (2) can be pulled up to take out the equipment. At the same time, the first hinged rod (14) and the anchor rod (15) will turn over the soil, and the pit can be filled by crushing the soil.

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