Cut-lock sampling device

Abstract

This invention provides a cutting-locking sampling device, comprising an outer tube, an inner tube, a cutting component, a limiting structure, and an elastic element. The bottom end of the outer tube has a first opening, and the inner tube has an inner cavity for accommodating materials and a second opening at its bottom end communicating with the inner cavity. The first and second openings are connected. The cutting component is movably disposed inside the outer tube and has a first position that avoids the second opening and a second position that blocks the second opening. The limiting structure has a switchable stop position and an avoidance position. When the limiting structure is in the stop position, it abuts against the cutting component; when it is in the avoidance position, it releases contact with the cutting component, providing a driving force for the cutting component to switch to the second position. This sampling device solves the problem in existing sampling devices that lack a closed structure, leading to sediment degradation due to external influences.

Description

Technical Field

[0001] This utility model relates to the technical field of sampling devices, and more specifically, to a cutting and locking sampling device. Background Technology

[0002] In the current field of geological and environmental monitoring, sediment sampling is a fundamental and crucial research method, aiming to collect soil and sediment samples for ecological restoration, hydrological surveys, sediment studies, and soil environmental assessments. Traditional sediment sampling devices, such as gravity sampling tubes, column samplers, and grab samplers, are widely used in various geological surveys due to their ease of operation and low manufacturing cost. These devices are typically inserted into the target sediment layer manually or with simple mechanical assistance, and then the sample is obtained by extraction. In field operations, their portability and ease of use make them important tools for preliminary soil or sediment property analysis.

[0003] However, traditional sampling methods and techniques have significant limitations when faced with complex geological conditions, such as highly saturated soft soil, bottom sedimentary layers, or loose sedimentary environments like tidal flats and silt. The main problem is the difficulty in sealing the samples. Most existing devices lack effective physical sealing mechanisms, which makes the samples susceptible to external contamination, moisture loss, or leakage during the extraction process, especially when lifting them from water or mud, thus reducing the quality of the samples.

[0004] As can be seen from the above, the sampling device of this application lacks a closed structure, which makes the sediments susceptible to external influences and thus leads to a decline in quality. Utility Model Content

[0005] The main objective of this invention is to provide a cutting and locking sampling device to solve the problem that existing sampling devices lack a closed structure, which makes the sediments susceptible to external influences and leads to a decline in quality.

[0006] To achieve the above objectives, according to one aspect of the present invention, a cutting-lock sampling device is provided for sampling sediments. The cutting-lock sampling device includes an outer tube, an inner tube, a cutting element, a limiting structure, and an elastic element. The bottom end of the outer tube has a first opening. The inner tube is disposed inside the outer tube and has an inner cavity for accommodating materials and a second opening at the bottom end communicating with the inner cavity. The first opening and the second opening are connected. The cutting element is movably disposed inside the outer tube and has a first position that avoids the second opening and a second position that blocks the second opening. The limiting structure is disposed between the inner tube and the cutting element and has a switchable stop position and an avoidance position. When the limiting structure is in the stop position, it abuts against the cutting element, providing a locking mechanism for the cutting element to be in the first position. When the limiting structure is in the avoidance position, it releases the abutment against the cutting element. The elastic element is disposed between the cutting element and the outer tube and provides a driving force for the cutting element to switch to the second position.

[0007] Furthermore, the limiting structures are arranged in pairs, with the two limiting structures arranged in pairs on the outer circumferential surface of the inner tube and spaced apart along the circumference of the inner tube. The cutting component is arranged in a one-to-one correspondence with the limiting structure, and the cutting component is slidably arranged on the limiting structure.

[0008] Furthermore, the two limiting structures are arranged 180° apart circumferentially along the inner tube; and / or the two cutting elements are arranged radially apart along the inner tube when in the first position; and the two cutting elements abut against each other radially along the inner tube when in the second position.

[0009] Furthermore, the limiting structure includes an installation port and a limiting block. The installation block is disposed on the outer circumferential surface of the inner tube body. The installation block has an installation groove with a top opening along the height direction of the outer tube body. The cutting piece is slidably disposed on the installation block. The limiting block is movably disposed in the installation groove. When the limiting structure is in the stop position, at least a part of the limiting block extends out of the installation groove and abuts against the cutting piece. When the limiting structure is in the avoidance position, the limiting block is accommodated inside the installation groove.

[0010] Furthermore, the limiting block is rotatably disposed inside the mounting groove. The limiting block is a columnar structure with an axial length greater than the depth of the mounting groove. The limiting structure also includes a traction component, one end of which is connected to the limiting block, and the other end of which is disposed along the height direction of the outer tube towards the top of the outer tube. The traction component can drive the limiting block to rotate. When the limiting structure is in the stop position, the axial direction of the limiting block is in the same direction as the height direction of the outer tube.

[0011] Furthermore, the cutting element has a through hole, at least a portion of the mounting block passes through the through hole, and the cutting element is slidably disposed on the top of the mounting block.

[0012] Furthermore, an installation area is formed between the inner tube and the outer tube. The cutting component includes a first plate segment and a second plate segment. The first plate segment is disposed in the installation area. The limiting structure abuts against or releases the first plate segment. The elastic element abuts between the first plate segment and the outer tube. The first plate segment and the second plate segment are bent. The second plate segment is disposed at the bottom end of the second opening. The second plate segment is used to block or avoid the second opening. The end of the second plate segment away from the first plate segment along the radial direction of the inner tube forms a cutting end.

[0013] Furthermore, multiple elastic elements are provided, and each second plate segment abuts against multiple elastic elements; and / or the distance between the top and bottom ends of the cutting end gradually decreases in the direction away from the first plate segment, and the side of the cutting end away from the first plate segment is formed into an angular structure.

[0014] Furthermore, the cutting and locking sampling device also includes a conical drill bit, the top of which is connected to the bottom of the outer tube. The drill bit has a channel communicating with the first opening and a bottom opening communicating with the channel. The diameter of the bottom opening is smaller than the diameter of the first opening.

[0015] Furthermore, the cut-lock sampling device also includes a locking element, which is detachably connected to the inner tube body through the outer tube body; and / or the cut-lock sampling device also includes a connector, which is disposed on the outer tube body for connection with external equipment; and / or the cut-lock sampling device also includes a handle, which is disposed on the outer tube body.

[0016] The cutting and locking sampling device, utilizing the technical solution of this utility model, includes an outer tube, an inner tube, a cutting component, a limiting structure, and an elastic component. The bottom end of the outer tube has a first opening. The inner tube is disposed inside the outer tube and has an inner cavity for accommodating materials and a second opening at the bottom end communicating with the inner cavity. The first opening and the second opening are connected. The cutting component is movably disposed inside the outer tube and has a first position that avoids the second opening and a second position that blocks the second opening. The limiting structure is disposed between the inner tube and the cutting component and has a switchable stop position and an avoidance position. When the limiting structure is in the stop position, it abuts against the cutting component, providing a locking mechanism for the cutting component to be in the first position. When the limiting structure is in the avoidance position, it releases the abutment against the cutting component. The elastic component is disposed between the cutting component and the outer tube and provides a driving force for the cutting component to switch to the second position.

[0017] As can be seen from the above, the cutting and locking sampling device of this application adopts a structure of cutting element, limiting structure, and elastic element. This allows the cutting element to remain in the first position when the limiting structure is in the stop position. When the limiting structure switches to the avoidance position, it releases the limiting structure from the cutting element. Under the driving action of the driving element, the cutting element automatically switches to the second position to block the second opening of the inner tube, thus sealing the second tube. Consequently, the sediment stored inside the second tube can move along with the sampling device. This application achieves automatic sealing of the inner tube through the cooperation of the cutting element, limiting structure, and elastic element, ensuring that the sediment inside the sampling device is sealed, thereby preventing damage to the sediment's quality. Furthermore, the position of the cutting element can be controlled by controlling the limiting structure. The overall structure is simple, easy to operate, and highly flexible.

[0018] This application adopts a double-tube structure with an inner tube and an outer tube. The outer tube protects the inner tube, while the inner tube provides space for the sediment, thus ensuring stable sediment collection. This structural design is beneficial for improving sampling efficiency and sampling stability.

[0019] The elastic element structure of this application enables the cutting component to automatically switch to the second position to close the second opening under the action of the elastic element, which improves the automation of the operation, simplifies the operation process, and improves the sampling efficiency. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A three-dimensional structural schematic diagram of the cutting and locking sampling device of this utility model is shown;

[0022] Figure 2 The front view of the cutting and locking sampling device of this utility model is shown;

[0023] Figure 3 It shows Figure 2 Sectional view along axis AA;

[0024] Figure 4 It shows Figure 3 Enlarged view of point B;

[0025] Figure 5 A schematic diagram showing the installation of the traction component, inner tube body, and cutting component of this utility model is provided.

[0026] Figure 6 It shows Figure 5 Enlarged view of point C;

[0027] Figure 7 A three-dimensional structural schematic diagram of the cutting component of this utility model is shown;

[0028] Figure 8 A schematic diagram of the installation structure of the cutting component and the limiting structure of this utility model is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Outer tube body; 20. Inner tube body; 30. Cutting component; 310. First plate segment; 311. Through hole; 320. Second plate segment; 321. Cutting end; 40. Limiting structure; 410. Mounting block; 420. Limiting block; 430. Traction component; 50. Elastic component; 60. Drill bit; 70. Locking component; 80. Connector; 90. Handle; 910. Collar; 920. Handle part. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0034] To address the problem that existing sampling devices lack a closed structure, making sediments susceptible to external influences and resulting in quality degradation, this application provides a cutting-lock sampling device for sampling sediments such as soil and silt.

[0035] Specifically, the cutting-lock sampling device is inserted into the sediment to allow the sediment to enter the inner tube for sampling. After sampling, the sediment is sealed inside the inner tube to prevent damage to its quality. Then, the sediment is moved and pulled out along with the cutting-lock sampling device to complete the sampling action.

[0036] like Figures 1 to 8As shown, the cutting and locking sampling device includes an outer tube 10, an inner tube 20, a cutting element 30, a limiting structure 40, and an elastic element 50. The bottom end of the outer tube 10 has a first opening, and the inner tube 20 is disposed inside the outer tube 10. The inner tube 20 has an inner cavity for containing materials and a second opening at the bottom end that communicates with the inner cavity. The first opening and the second opening are in communication.

[0037] In this application, a double-tube structure is adopted, with an inner tube 20 and an outer tube 10. The outer tube 10 serves to protect the inner tube 20, while the inner tube 20 provides space for accommodating sediments, thereby ensuring stable sediment acquisition. The structural design of this application is beneficial to improving sampling efficiency and sampling stability.

[0038] In this embodiment, the cutting and locking sampling device further includes a locking member 70. The locking member 70 is detachably connected to the inner tube 20 through the outer tube 10. The locking member 70 is a structural component such as a bolt. The locking member 70 can fix the inner tube 20 and the outer tube 10 together to ensure synchronous movement between the inner tube 20 and the outer tube 10. When it is necessary to disconnect the inner tube 20 and the outer tube 10, the locking member 70 can be pulled out. Multiple locking members 70 are provided, forming multiple fixing points between the inner tube 20 and the outer tube 10, thereby enabling the inner tube 20 to move stably with the outer tube 10.

[0039] The cutting element 30 is movably disposed inside the outer tube 10. The cutting element 30 has a first position that avoids the second opening and a second position that blocks the second opening. The limiting structure 40 is disposed between the inner tube 20 and the cutting element 30. The limiting structure 40 has a switchable stop position and an avoidance position. When the limiting structure 40 is in the stop position, the limiting structure 40 abuts against the cutting element 30 to lock the cutting element 30 in the first position. When the limiting structure 40 is in the avoidance position, the limiting structure 40 releases its abutment against the cutting element 30. The elastic element 50 is disposed between the cutting element 30 and the outer tube 10 to provide driving force for the cutting element 30 to switch to the second position.

[0040] The position of the cutting element 30 and the position of the limiting structure 40 in this application are linked. The first position and the second position of the cutting element 30, as well as the stop position and the avoidance position of the limiting structure 40, are linked in setting so that when the limiting structure 40 is in the stop position, it restricts the movement of the cutting element 30 and keeps it in the first position. When the corresponding limiting structure 40 switches to the avoidance position, the limit is released, and the cutting element 30 can switch to the second position to cut off the deposit and seal the internal deposit of the inner tube 20 inside the tube.

[0041] Specifically, the elastic element 50 is a spring. When the cutting element 30 is in the first position and the limiting structure 40 is in the stop position, the elastic element 50 is in a compressed state. When the limiting structure 40 switches to the avoidance position, the elastic force of the elastic element 50 drives the cutting element 30 to switch to the second position, thereby quickly sealing the second opening of the inner tube 20. This achieves undisturbed cutting and sealed preservation of the sediment sample, preventing the sediment inside the inner tube 20 from flowing out through the second opening. The structure of the elastic element 50 in this application allows for automatic driving of the cutting element 30 to switch to the second position and seal the second opening, improving the automation of the operation, simplifying the operation process, and increasing sampling efficiency.

[0042] In this embodiment, the cutting and locking sampling device adopts a structure of cutting element 30, limiting structure 40 and elastic element 50 to achieve the following: when the limiting structure 40 is in the stop position, the cutting element 30 is kept in the first position; when the limiting structure 40 switches to the avoidance position, the limiting structure 40 releases the limiting of the cutting element 30. Under the driving action of the driving element, the cutting element 30 automatically switches to the second position to block the second opening of the inner tube 20 and close the second tube. Then, the sediment stored inside the second tube can move with the sampling device.

[0043] Specifically, the present application can achieve automatic sealing of the inner tube 20 through the cooperation of the cutting component 30, the limiting structure 40 and the elastic component 50, so as to ensure that the sediment inside the sampling device is sealed, thereby avoiding damage to the quality of the sediment; and the position of the cutting component 30 can be controlled by controlling the limiting structure 40. The overall structure is simple, easy to operate and flexible.

[0044] like Figures 5 to 8 As shown, the cutting component 30 and the limiting structure 40 are set in a one-to-one correspondence and slide in fit.

[0045] Specifically, the limiting structures 40 are arranged in pairs, and the two limiting structures 40 arranged in pairs are set on the outer circumferential surface of the inner tube 20 and are spaced apart along the circumferential direction of the inner tube 20. The cutting piece 30 is arranged in a one-to-one correspondence with the limiting structure 40, and the cutting piece 30 is slidably set on the limiting structure 40.

[0046] The application includes two limiting structures 40 and two cutting elements 30, which are slidably engaged. The limiting structure 40 provides support for the installation of the cutting element 30. This application uses two cutting elements 30 arranged in pairs, allowing them to cooperate in sealing the second opening. The two corresponding limiting structures 40 limit the two cutting elements 30 and support their installation.

[0047] In this embodiment, two limiting structures 40 are arranged at 180° intervals along the circumference of the inner tube 20, and two cutting elements 30 are slidably arranged on the top surface of the limiting structures 40. The principle of this symmetrical layout is to ensure the balanced movement of the cutting elements 30, prevent deviation during the closing process, prevent sample leakage, thereby ensuring the uniformity and integrity of sample cutting, and improving the stability and sampling quality of the sampling device.

[0048] In this embodiment, the two cutting elements 30 are arranged radially spaced along the inner tube 20 when in the first position, and abut against each other radially along the inner tube 20 when in the second position. The cutting elements 30 move radially along the outer tube 10, with opposite directions of movement. Thus, when switching from the first position to the second position, the two cutting elements 30 move closer to each other radially along the outer tube 10 and abut against each other, thereby sealing the second opening through this abutment.

[0049] like Figure 6 and Figure 8 As shown, the limiting structure 40 of this application includes a mounting block 410 and a limiting block 420. The mounting block 410 is disposed on the outer peripheral surface of the inner tube 20. The mounting block 410 has a mounting groove with an opening at the top along the height direction of the outer tube 10. The cutting member 30 is slidably disposed on the mounting block 410. The limiting block 420 is movably disposed in the mounting groove. When the limiting structure 40 is in the stop position, at least a part of the limiting block 420 extends out of the mounting groove and abuts against the cutting member 30. When the limiting structure 40 is in the avoidance position, the limiting block 420 is accommodated inside the mounting groove.

[0050] The mounting block 410 is fixed on the outer circumferential surface of the inner tube 20. By adjusting the position of the limiting block 420 inside the mounting groove, the cutting piece 30 can be stopped or avoided. When the limiting structure 40 is in the stopping position, the part of the limiting block 420 extending out of the mounting groove can be used to stop the cutting piece 30 and limit it. At this time, the elastic element 50 between the cutting piece 30 and the inner circumferential surface of the outer tube 10 is in a compressed state. When the limiting structure 40 is in the avoiding position, since the limiting block 420 is completely accommodated inside the mounting groove, it does not have a part that abuts against the cutting piece 30. At this time, the cutting piece 30 moves radially along the outer tube 10 under the drive of the elastic element 50 and blocks the second opening.

[0051] In this embodiment, the cutting element 30 has a through hole 311, and at least a portion of the mounting block 410 passes through the through hole 311. The cutting element 30 is slidably disposed on the top end of the mounting block 410. The cutting element 30 is supported and slidably disposed on the top surface of the mounting block 410. Through the cooperation between the through hole 311 and the mounting block 410, the cutting element 30 can slide stably, ensuring smooth movement of the cutting element 30 during the closing process, avoiding jamming, and improving the stability and reliability of the sampling device.

[0052] Specifically, the limiting block 420 is rotatably disposed inside the mounting groove. The limiting block 420 has a columnar structure, and the axial length of the columnar structure is greater than the depth of the mounting groove. The position of the limiting block 420 can be adjusted by flipping it. The limiting block 420 of this application adopts a columnar structure and has a hollow axial channel. The limiting block 420 has a position in which it is placed upright inside the mounting groove to partially extend out of the mounting groove, and a position in which it lies horizontally inside the mounting groove. The length of the outer diameter of the limiting block 420 is less than the depth of the mounting groove. At this time, the limiting block 420 is completely accommodated inside the mounting groove.

[0053] In this embodiment, the limiting structure 40 also includes a traction member 430. One end of the traction member 430 is connected to the limiting block 420, and the other end of the traction member 430 is disposed along the height direction of the outer tube 10 toward the top end of the outer tube 10. The traction member 430 can drive the limiting block 420 to rotate. When the limiting structure 40 is in the stop position, the axial direction of the limiting block 420 is in the same direction as the height direction of the outer tube 10.

[0054] The traction component 430 is a traction rope or traction rod. The traction component 430 drives the limiting block 420 to switch positions, moving the limiting block 420 from the first position to the second position, thereby releasing the abutment of the limiting cutting component 30. Specifically, the traction component 430 passes through an axial channel on the limiting block 420 and connects to it. Driving the traction component 430 drives the limiting block 420.

[0055] like Figure 3 and Figure 4 As shown, an installation area is formed between the inner tube 20 and the outer tube 10. The cutting element 30 includes a first plate segment 310 and a second plate segment 320. The first plate segment 310 is disposed in the installation area. The limiting structure 40 is in contact with or releases contact with the first plate segment 310. The elastic element 50 is in contact between the first plate segment 310 and the outer tube 10. The first plate segment 310 and the second plate segment 320 are bent. The second plate segment 320 is disposed at the bottom end of the second opening. The second plate segment 320 is used to block or avoid the second opening. A cutting end 321 is formed at the end of the second plate segment 320 away from the first plate segment 310 along the radial direction of the inner tube 20.

[0056] The first plate segment 310 is an arc-shaped plate and is set parallel to the outer circumferential surface of the inner tube 20 and the inner circumferential surface of the outer tube 10. The second plate segment 320 is a flat plate structure and is set perpendicular to the first plate segment 310. The structure formed by the two second plate segments 320 is larger than the second opening. That is, the projection of the second opening on the structure formed by the two second plate segments 320 does not exceed the outer periphery formed by the two second plate segments 320, thereby ensuring that the second plate segment 320 can completely block the second opening.

[0057] Specifically, during the process of switching from the first position to the second position, when the two cutting elements 30 approach each other, the cutting ends 321 approach each other and cut the deposit, and the two cutting ends 321 come into contact to complete the cutting of the deposit.

[0058] In this embodiment, the cutting end 321 is formed as a cutter. Specifically, the distance between the top and bottom ends of the cutting end 321 gradually decreases in the direction away from the first plate segment 310, and the side of the cutting end 321 away from the first plate segment 310 is formed as an angular cutter. Using an angular cutter is beneficial to improving the efficiency of cutting sediments, thereby improving the sampling efficiency.

[0059] In this embodiment, multiple elastic elements 50 are provided, and each second plate segment 320 abuts against multiple elastic elements 50. The multiple elastic elements 50 are arranged at intervals along the circumference of the second plate segment 320. The multiple elastic elements 50 provide multiple elastic forces, which helps to increase the uniformity of the force on the second plate segment 320 and helps to ensure the stability of the movement of the cutting element 30 driven by the elastic elements 50.

[0060] like Figures 1 to 4 As shown, the cutting and locking sampling device also includes a conical drill bit 60. The top end of the drill bit 60 is connected to the bottom end of the outer tube 10. The drill bit 60 has a channel communicating with the first opening and a bottom opening communicating with the channel. The diameter of the bottom opening is smaller than the diameter of the first opening.

[0061] The conical drill bit 60 serves as a guide, ensuring the straightness of the sampling device during insertion. The diameter design of the bottom opening reduces sample loss during collection. The conical structure also facilitates drilling and improves sampling efficiency. During actual sampling, the sediment enters the inner tube 20 through the bottom opening of the drill bit 60.

[0062] The drill bit 60 of this application adopts a small-diameter structure, which helps to avoid the formation of congestion inside the inner tube 20 by sediment, which would affect the sampling.

[0063] In this embodiment, the cutting and locking sampling device also includes a connector 80, which is disposed on the outer tube 10 for connecting to external equipment. Specifically, the connector 80 is connected to the outer tube 10 by structural components such as bolts. During the use of the sampling device, it can be connected to external equipment, such as a vibrator for providing a power source, which can be connected to the vibrator through the connector 80.

[0064] In this embodiment, the cutting and locking sampling device also includes a handle 90, which is disposed on the outer tube 10. The sampling device can be operated manually through the handle 90. Specifically, the handle 90 includes a collar 910 and a handle portion 920. The collar 910 is fixedly sleeved on the outer tube 10, and the handle portion 920 is disposed on the outer circumferential surface of the collar 910 and extends radially away from the outer tube 10. The number of handle portions 920 can be one or more. When multiple handle portions 920 are provided, the multiple handle portions 920 are equally spaced along the circumference of the collar 910.

[0065] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0066] The cutting and locking sampling device of this application employs a structure of cutting element 30, limiting structure 40, and elastic element 50. This structure ensures that when the limiting structure 40 is in the stop position, the cutting element 30 remains in a first position. When the limiting structure 40 switches to the avoidance position, it releases the limiting structure 40 from the cutting element 30. Under the driving action of the driving element, the cutting element 30 automatically switches to a second position, sealing the second opening of the inner tube 20 and thus closing the second tube. Consequently, the sediment stored inside the second tube can move along with the sampling device. This application achieves automatic closure of the inner tube 20 through the cooperation of the cutting element 30, limiting structure 40, and elastic element 50, ensuring that the sediment inside the sampling device is sealed and preventing damage to the sediment's quality. Furthermore, the position of the cutting element 30 can be controlled by controlling the limiting structure 40. The overall structure is simple, easy to operate, and highly flexible.

[0067] This application adopts a double-tube structure with an inner tube 20 and an outer tube 10. The outer tube 10 protects the inner tube 20, while the inner tube 20 provides space for accommodating sediments, thereby ensuring stable sediment acquisition. The structural design of this application is conducive to improving sampling efficiency and sampling stability.

[0068] The structure of the elastic element 50 in this application enables the cutting element 30 to automatically switch to the second position to close the second opening under the action of the elastic element 50, which improves the automation of the operation, simplifies the operation process, and improves the sampling efficiency.

[0069] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0070] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cutting closed-sampling device for sampling sediments, characterized in that, The cutting and locking sampling device includes: The outer tube (10) has a first opening at its bottom end; An inner tube (20) is disposed inside the outer tube (10). The inner tube (20) has an inner cavity for containing materials and a second opening at the bottom end communicating with the inner cavity. The first opening communicates with the second opening. A cutting element (30) is movably disposed inside the outer tube body (10), the cutting element (30) having a first position to avoid the second opening and a second position to block the second opening; A limiting structure (40) is disposed between the inner tube body (20) and the cutting member (30). The limiting structure (40) has a switchable stop position and a clearance position. When the limiting structure (40) is in the stop position, the limiting structure (40) abuts against the cutting member (30) to lock the cutting member (30) in the first position. When the limiting structure (40) is in the clearance position, the limiting structure (40) releases its abutment against the cutting member (30). An elastic element (50) is disposed between the cutting element (30) and the outer tube (10) to provide a driving force for the cutting element (30) to switch to the second position.

2. The cutting closed-sampling device according to claim 1, wherein, The limiting structures (40) are arranged in pairs. The two limiting structures (40) are arranged on the outer circumferential surface of the inner tube (20) and are spaced apart along the circumferential direction of the inner tube (20). The cutting piece (30) is arranged in a one-to-one correspondence with the limiting structure (40) and the cutting piece (30) is slidably arranged on the limiting structure (40).

3. The cutting and locking sampling device according to claim 2, characterized in that, The two limiting structures (40) are arranged 180° apart circumferentially along the inner tube (20); and / or When the two cutting elements (30) are in the first position, they are arranged radially spaced along the inner tube body (20), and when the two cutting elements (30) are in the second position, they abut against each other radially along the inner tube body (20).

4. The cutting closed-sampling device according to claim 1, wherein, The limiting structure (40) includes: The mounting block (410) is disposed on the outer circumferential surface of the inner tube (20). The mounting block (410) has a mounting groove with a top opening along the height direction of the outer tube (10). The cutting piece (30) is slidably disposed on the mounting block (410). The limiting block (420) is movably disposed in the mounting groove. When the limiting structure (40) is in the stop position, at least a portion of the limiting block (420) extends out of the mounting groove and abuts against the cutting piece (30). When the limiting structure (40) is in the avoidance position, the limiting block (420) is accommodated inside the mounting groove.

5. The cutting closed-sampling device according to claim 4, wherein, The limiting block (420) is rotatably disposed inside the mounting groove. The limiting block (420) is a columnar structure, and the axial length of the columnar structure is greater than the depth of the mounting groove. The limiting structure (40) further includes: A traction member (430) is provided, one end of which is connected to the limiting block (420), and the other end of which is disposed along the height direction of the outer tube (10) toward the top end of the outer tube (10). The traction member (430) can drive the limiting block (420) to rotate. When the limiting structure (40) is in the stop position, the axial direction of the limiting block (420) is in the same direction as the height direction of the outer tube (10).

6. The cutting closed-sampling device according to claim 4, wherein, The cutting element (30) has a through hole (311), at least a portion of the mounting block (410) passes through the through hole (311), and the cutting element (30) is slidably disposed on the top end of the mounting block (410).

7. The cutting closed-sampling device according to claim 1, wherein, An installation area is formed between the inner tube (20) and the outer tube (10), and the cutting element (30) includes: The first plate segment (310) is disposed in the installation area. The limiting structure (40) is in limiting contact with or releases contact with the first plate segment (310). The elastic element (50) abuts between the first plate segment (310) and the outer tube body (10). The second plate segment (320) is bent and disposed at the bottom end of the second opening. The second plate segment (320) is used to block or avoid the second opening. A cutting end (321) is formed at the end of the second plate segment (320) away from the first plate segment (310) along the radial direction of the inner tube body (20).

8. The cutting and locking sampling device according to claim 7, characterized in that, The elastic element (50) is provided in a plurality of manners, and each of the second plate segments (320) abuts against a plurality of the elastic elements (50); and / or The distance between the top and bottom of the cutting end (321) gradually decreases in the direction away from the first plate segment (310), and the side of the cutting end (321) away from the first plate segment (310) is formed into an angular structure.

9. The cutting closed-sampling device, according to any one of claims 1 to 8, wherein, The cutting and locking sampling device further includes a conical drill bit (60), the top end of which is connected to the bottom end of the outer tube (10). The drill bit (60) has a channel communicating with the first opening and a bottom opening communicating with the channel. The diameter of the bottom opening is smaller than the diameter of the first opening.

10. The cutting and locking sampling device according to any one of claims 1 to 8, characterized in that, The cutting and locking sampling device further includes a locking element (70), which is detachably connected to the inner tube (20) through the outer tube (10); and / or The cutting and locking sampling device further includes a connector (80) disposed on the outer tube (10) for connection with external equipment; and / or The cutting and locking sampling device also includes a handle (90), which is disposed on the outer tube body (10).

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