Sampling mechanism and device

Abstract

The invention discloses a sampling mechanism and device, and relates to the technical field of soil environment monitoring, the sampling mechanism comprises a drill rod body, a sample drilling part arranged on the drill rod body and a sealing head, the drill rod body is provided with a sampling cavity, and the sealing head is installed in the sampling cavity through a lifting mechanism; the sampling device comprises the sampling mechanism. During sampling, drilling is conducted through the sample drilling part, the drill rod body moves downwards along a drill hole in the drilling process, after the drill rod body drills to the needed depth, the sealing head is opened, sampling is conducted, a sample directly enters the sampling cavity, the sampling cavity can be closed through the sealing head after the sample enters the sampling cavity, and other soil is prevented from entering the sampling cavity; therefore, the sample is prevented from being polluted, the effect of accurate sampling is realized, and the operation is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of soil environment monitoring, and in particular to a sampling mechanism and device. Background Art

[0002] Soil sampling is an important process for obtaining soil samples for physical, chemical or biological property analysis. It is widely used in agriculture, environmental monitoring, engineering construction, scientific research and other fields.

[0003] During the soil sampling process, the depth requirements are relatively strict, and it is necessary to ensure that the upper soil will not affect the soil sample.

[0004] In the existing technology, when sampling shallow soil, a special sampling drum can be used for sampling. When sampling deep soil, a drill rod is usually used to drill a hole first, and then a sampler is inserted into the hole to take the sample. In this way, relatively soft soil will remain in the hole. When the sampler is inserted, some soil will enter the sampler, causing the sample to be contaminated, making it difficult to sample accurately. In addition, this method requires repeated replacement of equipment, and the sampling process is relatively cumbersome. Summary of the Invention

[0005] Based on the problems of current soil sampling devices such as samples being easily contaminated, difficulty in accurate sampling, and cumbersome sampling processes, the purpose of the present invention is to provide a sampling mechanism and device that can accurately sample deep soil and avoid contamination of samples by upper soil layers, and the sampling device is simple to operate and easy to use.

[0006] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a sampling mechanism, comprising a drill rod body, a sampling portion arranged on the drill rod body, and a closing head, wherein the drill rod body defines a sampling cavity, and the closing head is installed in the sampling cavity via a lifting mechanism.

[0007] As an optional solution, a first limiting component is provided on the inner side of the sampling cavity, and a second limiting component is provided on the circumference of the closing head, and the first limiting component matches the second limiting component.

[0008] As an optional solution, the first limiting assembly includes a first avoidance groove and a limiting bar, and a V-shaped head is provided at the bottom end of the limiting bar; the second limiting assembly includes a first stop bar, a second stop bar, a sliding block and a closing spring, and the sliding block is axially slidably arranged on the closing head and a V-shaped groove for embedding the V-shaped head is provided at the top; a second avoidance groove is provided between the first stop bar and the sliding block, and the second stop bar is in contact with one side of the sliding block.

[0009] As an optional solution, the bottom end of the closing head is conical and provided with a reversing block. When the drill rod body is reversed, the reversing block can be blocked by the soil and cause the closing head to rotate relative to the drill rod body by a preset angle, so that the V-shaped head disengages from the V-shaped groove and the limiting bar enters the second avoidance groove.

[0010] As an optional solution, the reversal baffle includes a drilling blade and a movable plate, the drilling blade is fixed to the closed head, and the movable plate is hinged to the end of the drilling blade away from the closed head; when in the drilling state, the movable plate flips to the rear or obliquely rear of the drilling blade, and the angle between the movable plate and the drilling blade is the drilling angle; when in the sampling state, the angle between the movable plate and the drilling blade is the sampling angle; the drilling angle and the sampling angle are both obtuse angles and the drilling angle is smaller than the sampling angle.

[0011] As an optional solution, an axial third avoidance groove is provided on the inner side of the sampling cavity, and there is a distance between the bottom end of the third avoidance groove and the bottom end of the drill pipe body; the side wall of the closing head is provided with a wedge-shaped elastic protrusion, the top surface of the elastic protrusion is an inclined surface and can extend from one side of the closing head or retract into the closing head, and the elastic protrusion can be slidably limited in the third avoidance groove.

[0012] As an optional solution, the drill rod body includes a main rod and at least two half-cylinders, wherein one of the half-cylinders is fixedly connected to the bottom end of the main rod, and at least two of the half-cylinders are detachably connected to form the sampling cavity.

[0013] In a second aspect, the present application provides a sampling device, comprising the above-mentioned sampling mechanism, and also comprising a sampling lifting frame and a sampling lifting seat. The sampling lifting seat is installed on the sampling lifting frame through a lifting structure, and the top end of the drill rod body is connected to the sampling lifting seat.

[0014] As an optional solution, a plurality of auxiliary drill rods are further included. The drill rod body is coaxially arranged with the auxiliary drill rods and is detachably connected to the auxiliary drill rods. The auxiliary drill rods are connected to the sampling lifting seat.

[0015] As an optional solution, it also includes a platform mechanism and several stabilizing mechanisms. The sampling lifting frame is connected to the stabilizing structure, and the stabilizing mechanism is arranged on the platform mechanism in a liftable manner; several of the stabilizing mechanisms are connected to the side edges of the platform mechanism at intervals, and at least one group of the stabilizing mechanisms is installed on each side edge of the platform mechanism.

[0016] As an optional solution, the stabilizing mechanism includes a stabilizing drill rod, a stabilizing lifting frame, a stabilizing lifting seat, a deformable lifting frame, a deformable lifting seat and an anti-slip assembly; the stabilizing lifting frame is connected to the platform mechanism, the stabilizing lifting seat is liftable and arranged on the stabilizing lifting frame, and the stabilizing lifting frame is connected to a driving structure 1 for driving the stabilizing lifting seat to move up and down; the deformable lifting frame is arranged on the stabilizing lifting seat, and the deformable lifting seat is liftable and arranged on the deformable lifting frame; the stabilizing drill rod is rotatably connected to the deformable lifting seat, and the stabilizing lifting seat is connected to a driving structure 2 for driving the stabilizing drill rod to rotate; the anti-slip assembly is installed at one end of the stabilizing drill rod away from the deformable lifting seat.

[0017] As an optional solution, the anti-slip assembly includes a support rod and several support parts. A second spiral drill part and a stable area are provided on the outside of the stable drill rod, and several support parts are distributed around the stable area. The top end of the support rod is connected to the deformable lifting seat through a bearing.

[0018] As an optional solution, a scraper is provided on the outside of the expansion member, and the top end of the expansion member is hinged to the stabilizing drill rod. The expansion rod is used to expand the expansion member outward or retract it inward, and the maximum outer diameter of the expansion member after expansion is greater than the maximum outer diameter of the second spiral drill soil part.

[0019] As an optional solution, the stabilizing drill rod is provided with an axial stabilizing cavity, and the support rod can be raised and lowered and passed through the stabilizing cavity with its bottom end adjacent to the stabilizing area; the anti-slip assembly also includes a support rod, which is located on the inner side of the support member, and axial strip through holes are provided around the stabilizing area, and the strip through holes are connected to the stabilizing cavity, and the support rod passes through the strip through holes and its two ends are hinged to the bottom end of the support member and the bottom end of the support rod respectively.

[0020] As an optional solution, the stabilizing cavity includes a circular area and a square area, the support rod includes a circular segment and a square segment, the cross-section of the circular area is circular, the cross-section of the square area is rectangular, the length of the square area is smaller than the diameter of the circular area, the circular segment matches the circular area, and the square segment matches the square area.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The sampling mechanism of the present invention is provided with a drilling portion and a closing head on the drill rod body. When sampling, the drilling portion is used to drill a hole. During the drilling process, the drill rod body simultaneously moves downward along the hole. When the hole is drilled to the required depth, the closing head is opened and the sample is taken. The sample directly enters the sampling cavity. After the sample enters the sampling cavity, the sampling cavity can be closed by the closing head to prevent other soil from entering the sampling cavity, thereby preventing the sample from being contaminated, achieving the effect of accurate sampling, and simple operation.

[0022] (2) In the sampling device provided by the present invention, the platform mechanism is used to support the sampling mechanism, the sampling lifting seat can drive the drill rod body and the like to rise and fall along the sampling lifting frame, and the closing head can close or open the sampling cavity of the drill rod body; when the closing head is locked with the drill rod body and the sampling cavity is closed, the soil cannot enter the sampling cavity; when the closing head is unlocked with the drill rod body and the sampling cavity is opened, as the drill rod body continues to drill downward into the soil, the soil can push the closing head up relative to the sampling cavity, thereby allowing the soil to enter the sampling cavity for sampling. This arrangement enables the deep soil sampling device to accurately sample deep soil, avoid contamination of the sample by the upper soil, and the sampling operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in this application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the matching relationship between the drill rod body and the closing head in the sampling mechanism provided in Example 1 of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 2 A partial enlarged schematic diagram of the A0 part; Figure 4 A bottom view of the sampling mechanism without the closing head provided in Example 1 of the present invention; Figure 5 A schematic structural diagram of the closing head of the sampling mechanism provided in Example 1 of the present invention; Figure 6 Schematic diagram of the structure of the deep soil sampling device provided in Example 2 of the present invention Figure 1 ; Figure 7 Schematic diagram of the structure of the deep soil sampling device provided in Example 2 of the present invention Figure 2 ; Figure 8 Schematic diagram of the structure of the connection between the drill rod body and the lifting seat of the deep soil sampling device provided in Example 2 of the present invention Figure 1 ; Figure 9 Schematic diagram of the structure of the connection between the drill rod body and the lifting seat of the deep soil sampling device provided in Example 2 of the present invention Figure 2 ; Figure 10 Schematic diagram of the structure of the deep soil sampling device provided in Example 3 of the present invention Figure 1 ; Figure 11 Schematic diagram of the structure of the deep soil sampling device provided in Example 3 of the present invention Figure 2 ; Figure 12 Schematic diagram of the structure of the stabilizing mechanism of the deep soil sampling device provided in Example 3 of the present invention Figure 1 ; Figure 13 Schematic diagram of the structure of the stabilizing mechanism of the deep soil sampling device provided in Example 3 of the present invention Figure 2 ; Figure 14 for Figure 13 BB cross-sectional view; Figure 15 for Figure 12 A partial enlarged schematic diagram of part B0; Figure 16 for Figure 14 A partial enlarged schematic diagram of part C.

[0025] Reference numerals: 10-deep soil sampling device; 11-platform mechanism; 12-sampling mechanism; 15-stabilizing mechanism; 120-sampling lifting frame; 121-sampling lifting seat; 130-drill rod body; 131-first auger soil section; 132-sampling cavity; 133-first avoidance groove; 134-limiting bar; 135-third avoidance groove; 140-closing head; 141-first stop bar; 142-second stop bar; 143-sliding Block; 144-closing spring; 145-reversing baffle; 146-elastic protrusion; 147-second avoidance groove; 150-stable lifting frame; 151-stable lifting seat; 152-deformable lifting frame; 153-deformable lifting seat; 160-stable drill rod; 161-second auger soil part; 162-stable cavity; 170-support rod; 171-support member; 172-scraper; 173-support rod; 174-strip through hole. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, well-known materials or methods are not specifically described to avoid obscuring the present invention.

[0028] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment," "an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combinations and / or subcombinations. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Furthermore, one skilled in the art will be able to combine and combine different embodiments or examples, and features of different embodiments or examples, described in this specification, without mutual inconsistency.

[0029] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0030] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] In addition, the structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0033] Example 1 like Figure 1 、 2 As shown, this embodiment provides a sampling mechanism. The sampling mechanism 12 includes a sampling lifting frame 120, a sampling lifting seat 121, a drill rod body 130 and a closing head 140. The sampling lifting frame 120 is connected to the platform mechanism 11, and the sampling lifting seat 121 is liftably arranged on the sampling lifting frame 120. The top end of the drill rod body 130 is connected to the sampling lifting frame 120.

[0034] The structure of the sampling lift 120 is not limited. For example, the sampling lift 120 can be a gate-shaped structure or a square-shaped structure. The sampling lift 120 is fixed to the platform mechanism 11. The top end of the sampling lift 120 and the platform mechanism 11 can also be connected by a diagonal brace 170. Of course, the diagonal brace 170 can also be omitted.

[0035] The structure of the sampling lift seat 121 is not limited, for example, it can be a plate structure, a frame structure, etc. The sampling lift seat 121 can be lifted and lowered on the sampling lift frame 120.

[0036] The connection method between the sampling lifting seat 121 and the sampling lifting frame 120 is not limited. For example, in this embodiment, the following scheme can be adopted but is not limited to: a lead screw and two guide rods are provided on the sampling lifting frame 120, and the lead screw and the guide rods both extend vertically.

[0037] The two guide rods are arranged side by side, and the sampling lifting seat 121 is correspondingly provided with two guide holes, and the guide rods are passed through the guide holes so that the sampling lifting seat 121 can move up and down along the guide rods.

[0038] The number, diameter, height, etc. of the guide rods are not limited and can be set as needed. In other embodiments, the number of guide rods can also be one, three, etc.

[0039] The lead screw is rotatably supported on the sampling lifting frame 120, and the lead screw can rotate around its own center line. A nut that cooperates with the lead screw is provided on the sampling lifting seat 121. The lead screw and the nut rotate together to form a ball screw mechanism. The specific structure of the ball screw mechanism can refer to the existing technology. Under the limiting action of the guide rod and the guide hole, when the lead screw rotates around its own center line, it can drive the sampling lifting seat 121 to move up and down.

[0040] The lead screw can be driven by a power source such as a motor, and the lead screw and the motor can be directly coupled via a gear mechanism or a pulley mechanism, or indirectly coupled via a gear reducer or the like. Of course, in some embodiments, the ball screw mechanism can also be replaced by other structures, such as a telescopic cylinder. Specifically, the two ends of the telescopic cylinder are respectively connected to the sampling lift frame 120 and the sampling lift seat 121. The extension or contraction of the telescopic cylinder corresponds to the ascent or descent of the sampling lift seat 121: when the telescopic cylinder is extended or contracted, the sampling lift seat 121 rises; when the telescopic cylinder is contracted or extended, the sampling lift seat 121 descends.

[0041] The drill rod body 130 is rotatably supported on the sampling lift 121. The drill rod body 130 is capable of rotating about its own centerline and extends vertically. The drill rod body 130 may be a round or square rod, for example. The top end of the drill rod body 130 may be driven by a power source such as a motor. The transmission connection between the motor and the top end of the drill rod body 130 is not limited. For example, the motor and the top end of the drill rod body 130 may be directly coupled via a gear mechanism or pulley mechanism, or indirectly coupled via a gear reducer or the like.

[0042] Please combine Figure 1 、 2 As shown, a first auger soil portion 131 is provided on the circumferential surface of the drill rod body 130. The first auger soil portion 131 is distributed in a spiral shape. When the drill rod body 130 is driven by the motor to rotate, the first auger soil portion 131 can drill the soil to make the soil looser.

[0043] A sampling cavity 132 is provided at the bottom of the drill rod body 130 . The cross section of the sampling cavity 132 is circular. The height of the sampling cavity 132 is not limited and can be set as needed, such as 40 cm, 60 cm, etc.

[0044] like Figure 3 、 4As shown, the closing head 140 can be lifted and lowered to pass through the sampling cavity 132, and the closing head 140 and the bottom end of the drill rod body 130 have a locked state and an unlocked state: when the closing head 140 and the drill rod body 130 are in the locked state, the bottom end opening of the sampling cavity 132 is closed and soil cannot enter the sampling cavity 132; when the closing head 140 and the drill rod body 130 are in the unlocked state, the bottom end opening of the sampling cavity 132 is opened.

[0045] The locking structure between the closing head 140 and the drill rod body 130 is not limited and can be manually controlled or electrically controlled. In this embodiment, the following scheme is preferred: Figure 6-Figure 9 As shown, a first limiting assembly is provided inside the sampling cavity 132 , and the first limiting assembly includes a first avoidance groove 133 and a limiting bar 134 .

[0046] The first avoidance groove 133 extends along the axial direction of the drill rod body 130 , and the length and width thereof can be set as needed.

[0047] The limiting strip 134 is in the shape of an elongated strip. A V-shaped head is provided at the bottom end of the limiting strip 134 . The cross section of the V-shaped head is V-shaped, and the V-shape opens upward.

[0048] like Figure 5 As shown, the circumference of the closing head 140 is provided with a second limiting assembly, the number of which matches the number of the first limiting assemblies, and the limiting assembly includes a first stop bar 141 , a second stop bar 142 , a sliding block 143 and a closing spring 144 .

[0049] The first stop bar 141 and the second stop bar 142 are long strips, and extend along the axial direction of the closing head 140. The first stop bar 141 and the second stop bar 142 are respectively connected to the first avoidance groove 133 The sliding block 143 is axially slidably arranged on the closing head 140. The sliding connection method of the two is not limited and can be based on the existing technology. For example, a sliding groove is provided on the closing head 140 and the sliding block 143 is slidably embedded in the sliding groove, or a guide rail is provided on the closing head 140 and the sliding block 143 cooperates with the guide rail.

[0050] A V-shaped groove is provided at the top of the sliding block 143. The cross-section of the V-shaped groove is V-shaped, and its opening is upward. The shape and size of the V-shaped groove match the shape and size of the V-shaped head. The V-shaped head can be inserted into the V-shaped groove. The opening angle of the V-shaped head and the V-shaped groove determines the force required to apply the closing head 140 and the drill rod body 130 to rotate relative to each other. Generally speaking, the larger the opening angle of the V-shaped head and the V-shaped groove, the smaller the force required to apply the closing head 140 and the drill rod body 130 to rotate relative to each other, and vice versa. Therefore, the opening angle of the V-shaped head and the V-groove can be set as needed.

[0051] The closing spring 144 can be a compression spring or a tension spring. In this embodiment, the closing spring 144 adopts a compression spring. The two ends of the closing spring 144 are respectively in contact with the closing head 140 and the sliding block 143. The closing spring 144 has a tendency to stretch, so that it can push the sliding block 143 to press against the limit strip 134 and the V-shaped head is embedded in the V-shaped groove.

[0052] A second avoidance groove 147 is provided between the first stop bar 141 and the sliding block 143 , and the second stop bar 142 is in contact with one side of the sliding block 143 .

[0053] The bottom end of the closing head 140 is conical and is provided with a reversing baffle 145 . The reversing baffle 145 may be in any shape, for example, rectangular, trapezoidal, triangular, etc. The reversing baffle 145 extends substantially along the radial direction of the closing head 140 .

[0054] When the drill rod body 130 is reversed, the reverse blocking piece 145 can be blocked by the soil and the closing head 140 can be rotated relative to the drill rod body 130 by a preset angle, so that the V-shaped head is disengaged from the V-shaped groove and the limiting strip 134 enters the second avoidance groove 147.

[0055] With this arrangement, after the closing head 140 is installed, the closing spring 144 pushes the sliding block 143 to abut against the limit bar 134, so the closing head 140 cannot rotate easily. Only when a certain force is applied can the closing head 140 rotate relative to the drill rod body 130, thereby maintaining the stability of the closing head 140.

[0056] The sampling mechanism 12 has a drilling state and a sampling state: when the sampling mechanism 12 is in the drilling state, the closing head 140 is locked with the drill rod body 130, the first stop bar 141 abuts against the first side of the first avoidance groove 133, there is a gap between the second stop bar 142 and the second side of the first avoidance groove 133, the second side of the limit bar 134 abuts against the second stop bar 142, the V-shaped head is embedded in the V-shaped groove, the limit bar 134 presses the sliding block 143 to the first stop point and the closing head 140 The front end is exposed; when the sampling mechanism 12 is in the sampling state, the closing head 140 is unlocked from the drill rod body 130. Under the action of soil resistance, the closing head 140 rotates relative to the drill rod body 130 at a preset angle, the V-shaped head disengages from the V-shaped groove, and the sliding block 143 slides to the second stop point. The first side of the limiting bar 134 abuts against the first stop bar 141 and the second stop bar 142 abuts against the second side of the first avoidance groove 133. The limiting bar 134 is slidably disposed in the second avoidance groove 147.

[0057] For example: assume that the first avoidance groove 133 is divided into five equal parts, namely area A, area B, area C, area D and area E, and the limit bar 134 is in area C; the first stop bar 141 on the closing head 140 is area M, the second stop bar 142 is area N, the sliding block 143 is area P, and the area between the sliding block 143 and the first stop bar 141 is area Q.

[0058] When the sampling mechanism 12 is in the drilling state, area M overlaps with area A, area N overlaps with area D, area P overlaps with area C, and area N overlaps with area B. At this time, area E is vacant; when the sampling mechanism 12 is in the sampling state, area M overlaps with area B, area N overlaps with area E, area P overlaps with area D, and area N overlaps with area C. At this time, area A is vacant.

[0059] An axial third avoidance groove 135 is provided on the inner side of the sampling cavity 132. There is a gap between the bottom end of the third avoidance groove 135 and the bottom end of the drill pipe body 130. The side wall of the closing head 140 is provided with a wedge-shaped elastic protrusion 146. The top surface of the elastic protrusion 146 is an inclined surface and can extend from one side of the closing head 140 or retract into the closing head 140. The elastic protrusion 146 can be slidably limited in the third avoidance groove 135.

[0060] Of course, in other embodiments, other methods can be used to prevent the closing head 140 from easily falling out of the sampling cavity 132, or no restrictions are imposed on the two. For example, the closing head 140 and the drill rod body 130 are not provided with the third avoidance groove 135 and the elastic protrusion 146. When the limiting strip 134 is located in the second avoidance groove 147, the closing head 140 can freely separate from the sampling cavity 132. However, when this structure is used, other means must be used to ensure that the closing head 140 cannot separate from the closing cavity before contacting the soil.

[0061] Furthermore, to allow the reversing baffle 145 to exert greater force when the drill rod body 130 is reversed without affecting normal drilling operations, in some embodiments, the following solution may be employed, but is not limited to: the reversing baffle 145 includes a drilling blade and a movable plate (not shown), the drilling blade being fixed to the sealing head 140, and the movable plate being hinged to the end of the drilling blade away from the sealing head 140; when the sampling mechanism 12 is in the drilling state, the movable plate is rotated to the rear or obliquely rearward position of the drilling blade, and the angle between the movable plate and the drilling blade is the drilling angle; when the sampling mechanism 12 is in the state, the angle between the movable plate and the drilling blade is the sampling angle; the drilling angle and the sampling angle are both obtuse, and the drilling angle is smaller than the sampling angle. In other embodiments, the reversing baffle 145 may not employ the above structure.

[0062] The drill rod body 130 includes a main rod and several half-cylinders. The number of half-cylinders is not limited and can be two, three, etc., preferably two. One half-cylinder is fixedly connected to the bottom end of the main rod, and the other half-cylinder is detachably connected and encloses a sampling cavity 132.

[0063] In addition, since sampling is performed on deep soil, and the length of a single drill rod body 130 is limited due to the lifting height restriction of the sampling lifting seat 121, in some embodiments, the sampling mechanism 12 can also include a plurality of auxiliary drill rods, and the drill rod body 130 is coaxially arranged with the auxiliary drill rods and is detachably connected.

[0064] The method of using the deep soil sampling device provided in this embodiment is as follows: Move the platform mechanism 11 to the designated location. If the platform mechanism 11 adopts a crawler chassis, the user can control it to move through a remote control, or directly carry it to the designated location manually. The screw on the sampling lifting frame 120 is driven to rotate by a power source such as a motor, and the screw drives the sampling lifting seat 121 to move downward along the guide rod. The drill rod body 130 and other structures descend along with the sampling lifting seat 121, and the bottom end of the drill rod body 130 gradually approaches the ground. The drill rod body 130 is driven to rotate by a power source such as a motor, and the drill rod body 130 is used to drill into the soil and gradually penetrate into the soil. During this process, the sampling mechanism 12 is in a sampling state; When the drill rod body 130 reaches the specified depth, the sampling lifting seat 121 can be stopped from descending by turning off the corresponding motor or the like; The motor or other power source is reversed, thereby driving the drill rod body 130 to reverse. The soil exerts a reverse force on the reverse blocking piece 145 on the closing head 140, preventing the closing head 140 from rotating accordingly, thereby causing the sampling mechanism 12 to transition from the soil drilling state to the sampling state. During this process, the sampling lifting base 121 can be appropriately raised by a certain distance, which does not need to be too large, for example, a few centimeters, to allow the closing head 140 to separate from the hard soil that has not been drilled. When the sampling mechanism 12 is transformed into the sampling state, the closing head 140 can be reversed synchronously with the drill pipe body 130; The motor or other power source is rotated forward and drives the drill rod body 130 to rotate forward, and the sampling lift 121 is further lowered. The port of the sampling cavity 132 cuts the soil below. The cut soil gradually enters the sampling cavity 132 and pushes the closing head 140 to rise relative to the sampling cavity 132. That is, the closing head 140 maintains a constant height while the sampling cavity 132 descends. During this process, although the drill rod body 130 drives the closing head 140 to rotate, since the closing head 140 is not subjected to a downward force, the closing head 140 does not drill into the soil downward and can remain in place. When the sampling mechanism 12 is in the sampling state, the sampling lifting seat 121 stops sampling after descending a certain distance. At this time, the soil in the sampling cavity 132 is compacted and not easy to escape. At this time, the sampling lifting seat 121 is raised to take out the soil sample. During this process, the drill rod body 130 can be reversed or stopped. One of the half cylinders is removed, and then the soil in the sampling cavity 132 is taken out.

[0065] The above steps can be increased, decreased, modified, or the order can be adjusted as needed. For example, if the sampling cavity 132 of the drill rod body 130 is a whole, the soil in the sampling cavity 132 can be taken out by a thin stick or the like.

[0066] Example 2 Based on Example 1, this embodiment provides a deep soil sampling device, including the sampling mechanism in Example 1, such as Figure 8 、 9 As shown, the deep soil sampling device 10 also includes a sampling lifting frame 120 and a sampling lifting base 121. The sampling lifting base 121 is mounted on the sampling lifting frame 120 via a lifting structure, and the top end of the drill rod body 130 is connected to the sampling lifting base 121. The deep soil sampling device 10 is mainly used for soil sampling, and can sample shallow soil or deep soil.

[0067] Among them, such as Figure 6 As shown, the deep soil sampling device 10 mainly consists of a platform mechanism 11 and a sampling mechanism 12. The sampling mechanism 12 is arranged on the platform mechanism 11 in a liftable manner. The following is a detailed discussion of each component. The sampling mechanism in this embodiment is the sampling mechanism in Example 1.

[0068] like Figure 7 As shown, the platform mechanism 11 is mainly used to provide support for the sampling mechanism 12, etc. The size of the platform mechanism 11 can be set as needed. Generally speaking, the greater the sampling depth, the larger the occupied area of ​​the platform mechanism 11, and vice versa.

[0069] The structure and material of the platform mechanism 11 are not limited. The platform mechanism 11 can adopt a self-propelled structure or a temporarily built frame structure or a cement platform. In this embodiment, the platform mechanism 11 adopts a self-propelled structure. Specifically, it can adopt but is not limited to the following schemes: the platform mechanism 11 adopts a crawler chassis.

[0070] The tracked chassis is relatively conventional, and the structure of the tracked chassis can refer to the existing technology. For example, the tracked chassis includes a main body and two track assemblies, and the two track assemblies are installed on both sides of the main body. The track assembly includes a track frame, a drive wheel, a support wheel and a crawler, etc. The drive wheel and the support wheel rotate around their own center lines and are arranged on the track frame. The drive wheel is driven by a motor or other power source. The number of support wheels is not limited, such as five, eight, ten, etc. The crawler is sleeved on the outside of the drive wheel and the support wheel, and the drive wheel and the crawler are connected by transmission, that is, when the drive wheel rotates under the drive of the power source, it can drive the crawler to rotate, and the support wheel abuts against the inner side of the crawler, and the support wheel is mainly used to support the crawler. A shock-absorbing mechanism can also be provided between the support wheel and the track frame. The style of the shock-absorbing mechanism can refer to the existing technology. Of course, it is also possible not to provide a shock-absorbing mechanism between the two.

[0071] In addition, the tracked chassis can also be equipped with a camera, which is used to identify obstacles or environmental information in front, and send the obstacle information or environmental information to its own control system or the control terminal used by the user. The control terminal can be a mobile phone, computer, control handle, etc.

[0072] There is no limit to the walking control method of the crawler chassis. For example, it can be autonomously controlled to walk along a predetermined route through its built-in program, or it can be controlled by a remote control, etc. These technologies can refer to existing technologies.

[0073] In other embodiments, the platform mechanism 11 may also be a wheelbarrow, a tractor, etc.

[0074] Example 3 like Figure 10 As shown, this embodiment provides a deep soil sampling device. Compared with embodiment 2, the main difference is that the deep soil sampling device 10 also includes a plurality of stabilizing mechanisms 15.

[0075] As is well known, when drilling and sampling deep soil, it is necessary to ensure the stability of the sampling mechanism 12 and the orientation of the drill rod body 130. In other words, it is necessary to ensure that the axial direction of the drill rod body 130 is always perpendicular to the ground. The stability of the sampling mechanism 12 is largely determined by the stability of the platform mechanism 11. If the platform mechanism 11 is not stable enough, the drill rod body 130 will tilt or fluctuate.

[0076] On some large mechanical equipment, several cantilevers are extended around the platform mechanism 11, and the bottom ends of the cantilevers are supported on the ground. Such an arrangement can increase the floor space of the platform mechanism 11, and the greater gravity of the platform mechanism 11 can maximize the stability of the platform mechanism 11.

[0077] The deep soil sampling device 10 in the present application is mainly used in the field of scientific research. It is relatively small in size and light in weight. If the above solution is adopted, the platform mechanism 11 may still shake.

[0078] In the prior art, there is the following technical solution: a plurality of drill rods are arranged around the platform mechanism 11, and the drill rods are drilled into the soil. The stability of the platform mechanism 11 is increased through the interaction force between the drill rods and the soil.

[0079] However, if the above technical solution is adopted, the soil in the borehole will be completely broken up due to the excessive rotation speed of the drill rod when drilling into the soil. That is, the borehole is a circular hole containing loose soil, and the loose soil has a low restraining force on the drill rod. When the platform mechanism 11 vibrates, the drill rod may still move up and down along the borehole, thereby causing insufficient stability of the platform mechanism 11.

[0080] In order to improve the above problems, Figure 11 As shown, this embodiment provides the following improvement solution: a plurality of stabilizing mechanisms 15 are distributed around the platform mechanism 11 .

[0081] Please combine Figure 12 、 13 As shown, the stabilizing mechanism 15 includes a stabilizing drill rod 160, a stabilizing lifting frame 150, a stabilizing lifting seat 151, a deformable lifting frame 152, a deformable lifting seat 153 and an anti-slip assembly.

[0082] The structure of the stabilizing lifting frame 150 is not limited. For example, the stabilizing lifting frame 150 can be a gate-shaped structure or a square-shaped structure. The stabilizing lifting frame 150 is fixed to the platform mechanism 11. The top end of the stabilizing lifting frame 150 and the platform mechanism 11 can also be connected by a diagonal brace 170. Of course, the diagonal brace 170 can also be omitted.

[0083] The structure of the stable lifting seat 151 is not limited, for example, it can be a plate structure, a frame structure, etc. The stable lifting seat 151 can be lifted and lowered on the stable lifting frame 150.

[0084] The connection method between the stable lifting seat 151 and the stable lifting frame 150 is not limited. For example, in this embodiment, the following scheme can be adopted but is not limited to: the stable lifting frame 150 is connected to a driving structure 1 that drives the stable lifting seat 151 to move up and down. The driving structure 1 includes a screw and two guide rods provided on the stable lifting frame 150, and the screw and the guide rods both extend vertically.

[0085] The two guide rods are arranged side by side, and two guide holes are correspondingly provided on the stable lifting seat 151. The guide rods are passed through the guide holes so that the stable lifting seat 151 can move up and down along the guide rods.

[0086] The number, diameter, height, etc. of the guide rods are not limited and can be set as needed. In other embodiments, the number of guide rods can also be one, three, etc.

[0087] The lead screw is rotatably supported on the stable lifting frame 150, and the lead screw can rotate around its own center line. A nut that cooperates with the lead screw is provided on the stable lifting seat 151. The lead screw and the nut rotate together to form a ball screw mechanism. The specific structure of the ball screw mechanism can refer to the existing technology. Under the limiting action of the guide rod and the guide hole, when the lead screw rotates around its own center line, it can drive the stable lifting seat 151 to move up and down.

[0088] The lead screw can be driven by a power source such as a motor. The lead screw and the motor can be directly coupled via a gear mechanism or a pulley mechanism, or indirectly coupled via a gear reducer or the like. Of course, in some embodiments, the ball screw mechanism can be replaced by other structures, such as a telescopic cylinder. Specifically, the two ends of the telescopic cylinder are respectively connected to the stable lifting frame 150 and the stable lifting seat 151. The extension or contraction of the telescopic cylinder corresponds to the ascent or descent of the stable lifting seat 151: when the telescopic cylinder is extended or contracted, the stable lifting seat 151 rises; when the telescopic cylinder is contracted or extended, the stable lifting seat 151 descends.

[0089] like Figure 14 As shown, the stabilizing drill rod 160 is rotatably supported on the stabilizing lift base 151. The stabilizing drill rod 160 can rotate about its own centerline and extends vertically. The stabilizing drill rod 160 may be a round or square rod, for example. A second drive structure is connected to the stabilizing lift base 151 to drive the stabilizing drill rod 160. The second drive structure includes a power source, such as a motor, connected to the top of the stabilizing drill rod 160. The transmission connection between the motor and the top of the stabilizing drill rod 160 is not limited. For example, the two can be directly coupled via a gear mechanism or a pulley mechanism, or indirectly coupled via a gear reducer or the like.

[0090] The outer side of the stabilizing drill rod 160 is provided with a second auger soil portion 161 and a stabilizing area.

[0091] The second auger soil drilling portion 161 is distributed on the circumference of the stable drill rod 160 along the spiral direction. The second auger soil drilling portion 161 is mainly used for drilling the soil so that the stable drill rod 160 can penetrate into the soil.

[0092] The location of the stable zone is not limited. For example, the stable zone can be set in the middle or lower area of ​​the stable drill rod 160. The stable zone divides the second auger soil part 161 into two sections. Of course, in some embodiments, it is also possible that there is no second auger soil part 161 at the top or bottom of the stable zone.

[0093] The cross-sectional shape of the stable region is not limited, and can be, for example, rectangular, circular, or any other shape.

[0094] The anti-drop assembly is installed on the stable drill rod 160. Figure 15 、 Figure 16 As shown, the anti-slip assembly includes a support rod 170 and a plurality of support members 171. The support rod 170 is used to drive the support members 171 to expand or retract.

[0095] The number of the expansion members 171 is not limited, for example, one, two, four, etc. In this embodiment, the number of the expansion members 171 is four, and the four expansion members 171 are distributed around the stabilization area.

[0096] The structure of the support member 171 is not limited, for example, it can be plate-shaped, blade-shaped, rod-shaped, etc. A scraper 172 is provided on the outside of the support member 171. The style of the scraper 172 is not limited, for example, the scraper 172 adopts an inclined blade shape, plate shape, etc., which is mainly used to scrape the soil when the support member 171 is unfolded.

[0097] The top end of the support member 171 is hinged to the stabilizing drill rod 160. The hinge method can refer to the existing technology. For example, the two are pivoted through a pivot axis. The pivot can be regarded as a kind of hinge. The pivot axis can also be used as a hinge axis. The support member 171 can rotate around the hinge axis, so that the support member 171 can be flipped upward to expand or folded downward.

[0098] When the expansion member 171 is unfolded, the length direction of the expansion member 171 is set at an angle to the axial direction of the stable drill rod 160. The angle is not limited, but it is necessary to ensure that the maximum outer diameter of the expansion member 171 after expansion is greater than the maximum outer diameter of the second spiral drill soil part 161, that is, the farthest end of the expansion member 171 can contact the soil that has not been broken up by the second spiral drill soil part 161.

[0099] The support rod 170 is movably disposed within the stabilizing drill rod 160, thereby driving the expansion member 171 to expand or retract. The structure of the support rod 170 is not limited, and it can be, for example, a round rod or a square rod. In this embodiment, the stabilizing drill rod 160 is provided with a stabilizing cavity 162. The stabilizing cavity 162 extends downward from the top of the stabilizing drill rod 160, that is, the stabilizing cavity 162 extends along the axial direction of the stabilizing drill rod 160. The support rod 170 is movably disposed within the stabilizing cavity 162. The bottom end of the support rod 170 is adjacent to the stabilizing area. There is a certain amount of space at the bottom of the support rod 170. The height of the space can be set as needed to enable the support rod 170 to move up and down.

[0100] There is no limit to the driving method between the support rod 170 and the support member 171. For example, the two are coordinated through a gear rack mechanism, that is, a gear is provided on the support member 171, and the gear is coaxially arranged with the rotating shaft of the support member 171. A rack is provided on one side of the support rod 170, and the gear and rack structure cooperate. When the support rod 170 moves up and down, the rack can drive the gear to rotate forward or reverse, thereby expanding or retracting the support member 171.

[0101] In this embodiment, the driving method of the support rod 170 and the support member 171 can also adopt the following technical solution: the anti-slip component also includes a support rod 173, the support rod 173 is located on the inner side of the support member 171, and the two ends of the support rod 173 are hinged to the bottom end of the support member 171 and the bottom end of the support rod 170 respectively. The hinge method between the support rod 173 and the support member 171, or between the support rod 173 and the support rod 170 is not limited, for example, they are all pivoted through a pivot shaft, etc.

[0102] Since the support rod 170 is located in the stabilizing cavity 162, the support piece 171 is located outside the stabilizing cavity 162, and the two ends of the support rod 173 are hinged to the support rod 170 and the support piece 171 respectively, it is necessary to provide a strip through hole 174 in the stabilizing area. The strip through hole 174 is connected to the stabilizing cavity 162, and the support rod 173 can pass through the strip through hole 174. The strip through hole 174 is used to provide a movable range for the support rod 173. The length of the strip through hole 174 can be greater than or slightly greater than the length of the support rod 173.

[0103] The support rod 173 can be various styles such as a round rod, a square rod, a rectangular plate, etc. The length of the support rod 173 is not limited and can be set as needed. The length of the support rod 173 and the hinge position at both ends determine the expansion angle of the expansion member 171. The expansion angle refers to the angle between the expansion member 171 and the stabilizing drill rod 160. Generally speaking, the longer the support rod 173, the larger the expansion angle of the expansion member 171, but the larger the activity space occupied by the support rod 173. Therefore, it is better to make the length of the support rod 173 less than or slightly less than the length of the expansion member 171.

[0104] The hinge axes between the expansion member 171 and the stabilizing drill rod 160, the hinge axes between the expansion member 171 and the support rod 173, and the hinge axes between the support rod 173 and the expansion member 170 are arranged in a triangle. The hinge axes between the expansion member 171 and the stabilizing drill rod 160 and between the expansion member 171 and the support rod 173 constitute the first side, the hinge axes between the expansion member 171 and the support rod 173 and between the support rod 173 and the expansion member 170 constitute the second side, and the hinge axes between the support rod 173 and the expansion member 170 and between the expansion member 171 and the stabilizing drill rod 160 constitute the third side. When the expansion member 170 slides up and down, the length of the third side changes, thereby changing the shape of the triangle and causing the expansion member 171 to expand or collapse.

[0105] The lifting of the support rod 170 can drive the expansion member 171 to expand. However, since the expansion member 171 is located in the soil, its expansion is limited. Therefore, during the process of the support rod 170 driving the expansion member 171 to expand, the stable drill rod 160 needs to continue to rotate. At this time, the stable lifting seat 151 can no longer be lifted or lowered.

[0106] The lifting and lowering driving method of the support rod 170 is not limited. In this embodiment, the following solutions can be adopted but are not limited to: the stabilizing mechanism 15 also includes a deformable lifting frame 152 and a deformable lifting seat 153.

[0107] The connection method between the deformable lifting seat 153 and the deformable lifting frame 152 is not limited, and can refer to but is not limited to the connection method between the stable lifting seat 151 and the stable lifting frame 150. For example, the deformable lifting frame 152 is provided with two guide rods, and the two guide rods extend vertically. The deformable lifting seat 153 is provided with two guide holes, and the guide rods are inserted into the guide holes.

[0108] In addition, a lifting cylinder can be provided between the deformable lifting seat 153 and the deformable lifting frame 152 , and both ends of the lifting cylinder are respectively connected to the deformable lifting seat 153 and the deformable lifting frame 152 , thereby realizing the rising or falling of the deformable lifting seat 153 .

[0109] In other embodiments, the deformation lifting seat 153 and the deformation lifting frame 152 can also be lifted and lowered by a ball screw mechanism or the like.

[0110] The top end of the support rod 170 is rotatably engaged with the deformable lifting seat 153 via a bearing, so that the support rod 170 can be driven by the stabilizing drill rod 160 to rotate around its own center line while being lifted or lowered.

[0111] The lifting and lowering of the stable lifting seat 151, the lifting and lowering of the deformable lifting seat 153, the lifting and lowering of the support rod 170, and the rotation of the stable drill rod 160 can all be remotely controlled, or driven by the deep soil sampling device according to its internal set program, or can be manually controlled, for example, the rotation of the screw is driven by the user's hand crank, etc.

[0112] In addition, in order to enable the synchronized rotation between the stabilized drill rod 160 and the support rod 170, in some embodiments, the following scheme may be adopted but is not limited to: the stabilizing cavity 162 includes a circular area and a square area, the support rod 170 includes a circular segment and a square segment, the cross-section of the circular area is circular, the cross-section of the square area is rectangular, the length of the square area is smaller than the diameter of the circular area, the circular segment matches the circular area, and the square segment matches the square area.

[0113] The stabilization steps of the deep soil sampling device 10 provided in this embodiment are as follows: The deep soil sampling device 10 arrives at the designated location; The lead screw on the stable lifting frame 150 is driven to rotate by a power source such as a motor, and the lead screw drives the stable lifting seat 151 to move downward along the guide rod. The stable drill rod 160 and other structures descend along with the stable lifting seat 151, and the bottom end of the stable drill rod 160 gradually approaches the ground. The stable drill rod 160 is driven to rotate by a power source such as a motor, and the stable drill rod 160 is used to drill the soil and gradually penetrate into the soil; When the stable drill rod 160 reaches the specified depth, the stable lifting seat 151 can be stopped from descending by turning off the corresponding motor or the like; The deformable lifting seat 153 is driven to move downward along the guide rod by a power source such as a telescopic cylinder. The support rod 170 moves downward with the deformable lifting seat 153 relative to the stable drill rod 160. The support rod 170 drives the expansion member 171 to flip upward and expand to a preset angle through the support rod 173 and the like, so that the maximum outer diameter of the expansion member 171 is larger than the maximum outer diameter of the second auger soil portion 161, that is, the maximum outer diameter of the expansion member 171 is larger than the diameter of the drill hole made by the stable drill rod 160. During this process, since the stable drill rod 160 is always rotating, it can drive the support rod 170 and the expansion member 171 to rotate, so that the scraper 172 on the expansion member 171 can drill the soil; The stabilizing mechanism 15 can be stopped from working and fixed by shutting down the corresponding motor, telescopic cylinder, etc. At this time, the soil above the upper surface of the support member 171 (not the loose soil in the drilled hole) prevents the support member 171 from moving upward, and the soil above the upper surface of the support member 171 prevents the support member 171 from moving downward. Of course, since the deep soil sampling device 10 is supported by the ground, it will also prevent the support member 171 from moving upward. Therefore, the support member 171 cannot move up and down, thereby making the deep soil sampling device 10 more stable.

[0114] Finally, it should be noted that the specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application.

Claims

1. A sampling mechanism, characterized in that: The drill rod body (130) comprises a drill sampling portion (131) arranged on the drill rod body (130), and a closing head (140). The drill rod body (130) is provided with a sampling cavity (132), and the closing head (140) is installed in the sampling cavity (132) via a lifting mechanism.

2. A sampling mechanism according to claim 1, characterized in that: A first limiting assembly is provided on the inner side of the sampling cavity (132), and a second limiting assembly is provided on the peripheral surface of the closing head (140), wherein the first limiting assembly matches the second limiting assembly.

3. A sampling mechanism according to claim 2, characterized in that: The first limiting assembly includes a first avoidance groove (133) and a limiting bar (134), and a V-shaped head is provided at the bottom end of the limiting bar (134); the second limiting assembly includes a first stop bar (141), a second stop bar (142), a sliding block (143) and a closing spring (144), and the sliding block (143) is axially slidably arranged on the closing head (140) and a V-shaped groove for embedding the V-shaped head is provided at the top; a second avoidance groove (147) is provided between the first stop bar (141) and the sliding block (143), and the second stop bar (142) is in contact with one side of the sliding block (143).

4. A sampling mechanism according to claim 3, characterized in that: The bottom end of the closing head (140) is conical and is provided with a reversing baffle (145).

5. A sampling mechanism according to claim 4, characterized in that: The reversing baffle (145) comprises a soil drilling blade and a movable plate, wherein the soil drilling blade is fixed to the closed head (140), and the movable plate is hinged to an end of the soil drilling blade away from the closed head (140); when in a soil drilling state, the movable plate flips to the rear or obliquely rear of the soil drilling blade, and the angle between the movable plate and the soil drilling blade is a soil drilling angle; when in a sampling state, the angle between the movable plate and the soil drilling blade is a sampling angle; the soil drilling angle and the sampling angle are both obtuse angles, and the soil drilling angle is smaller than the sampling angle.

6. A sampling mechanism according to claim 3, characterized in that: An axial third avoidance groove (135) is provided on the inner side of the sampling cavity (132), and a gap exists between the bottom end of the third avoidance groove (135) and the bottom end of the drill rod body (130); a wedge-shaped elastic protrusion (146) is provided on the side wall of the closing head (140), and the top surface of the elastic protrusion (146) is an inclined surface and can extend from one side of the closing head (140) or retract into the closing head (140), and the elastic protrusion (146) can be slidably limited in the third avoidance groove (135).

7. A sampling mechanism according to claim 1, characterized in that: The drill rod body (130) comprises a main rod and at least two half-cylinders, wherein one of the half-cylinders is fixedly connected to the bottom end of the main rod, and at least two of the half-cylinders are detachably connected and enclose the sampling cavity (132).

8. A sampling device, characterized in that: The sampling mechanism comprises the sampling mechanism according to any one of claims 1 to 7, and further comprises a sampling lifting frame (120) and a sampling lifting seat (121), wherein the sampling lifting seat (121) is installed on the sampling lifting frame (120) through a lifting structure, and the top end of the drill rod body (130) is connected to the sampling lifting seat (121).

9. A sampling device according to claim 8, characterized in that: It also includes a plurality of auxiliary drill rods. The drill rod body (130) is coaxially arranged with the auxiliary drill rods and is detachably connected to the auxiliary drill rods. The auxiliary drill rods are connected to the sampling lifting seat (121).

10. A sampling device according to claim 8, characterized in that: It also includes a platform mechanism (11) and a plurality of stabilizing mechanisms (15), wherein the sampling lifting frame (120) is connected to the stabilizing structure (15), and the stabilizing mechanism (15) is arranged on the platform mechanism (11) in a liftable manner; a plurality of the stabilizing mechanisms (15) are connected to the side edges of the platform mechanism (11) at intervals, and at least one group of the stabilizing mechanisms (15) is installed on each side edge of the platform mechanism (11).

11. A sampling device according to claim 10, characterized in that: The stabilizing mechanism (15) comprises a stabilizing drill rod (160), a stabilizing lifting frame (150), a stabilizing lifting seat (151), a deformable lifting frame (152), a deformable lifting seat (153) and an anti-slip assembly; the stabilizing lifting frame (150) is connected to the platform mechanism (11); the stabilizing lifting seat (151) is movably arranged on the stabilizing lifting frame (150); and the stabilizing lifting frame (150) is connected to a driving structure for driving the stabilizing lifting seat (151) to move up and down. One: the deformable lifting frame (152) is arranged on the stable lifting seat (151), and the deformable lifting seat (153) is movably arranged on the deformable lifting frame (152); the stable drill rod (160) is rotatably connected to the deformable lifting seat (153), and the stable lifting seat (151) is connected to a driving structure for driving the stable drill rod (160) to rotate. Two: the anti-slip assembly is installed at one end of the stable drill rod (160) away from the deformable lifting seat (153).

12. A sampling device according to claim 11, characterized in that: The anti-slip assembly comprises a support rod (170) and a plurality of support members (171); a second auger soil portion (161) and a stabilizing area are provided on the outside of the stabilizing drill rod (160); and a plurality of support members (171) are distributed around the stabilizing area; and the top end of the support rod (170) is connected to the deformable lifting seat (153) via a bearing.

13. A sampling device according to claim 12, characterized in that: A scraper (172) is provided on the outside of the expansion member (171), the top end of the expansion member (171) is hinged to the stabilizing drill rod (160), and the expansion rod (170) is used to expand the expansion member (171) outward or retract it inward, and the maximum outer diameter of the expansion member (171) after expansion is greater than the maximum outer diameter of the second auger soil part (161).

14. A sampling device according to claim 12, characterized in that: The stabilizing drill rod (160) is provided with an axial stabilizing cavity (162), and the support rod (170) can be lifted and lowered and is passed through the stabilizing cavity (162) with its bottom end adjacent to the stabilizing area; the anti-slip assembly also includes a support rod (173), and the support rod (173) is located on the inner side of the support member (171). Axial strip-shaped through holes (174) are provided around the stabilizing area, and the strip-shaped through holes (174) are communicated with the stabilizing cavity (162). The support rod (173) passes through the strip-shaped through holes (174) and its two ends are respectively hinged to the bottom end of the support member (171) and the bottom end of the support rod (170).

15. A sampling device according to claim 14, characterized in that: The stabilizing cavity (162) includes a circular area and a square area, and the support rod (170) includes a circular segment and a square segment. The cross-section of the circular area is circular, the cross-section of the square area is rectangular, the length of the square area is smaller than the diameter of the circular area, the circular segment matches the circular area, and the square segment matches the square area.

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