Exploratory well sampling device for loess area

Abstract

The exploratory well sampling device for the loess area comprises vertical plates which are oppositely arranged at intervals, the vertical plates are connected through a bidirectional electric cylinder, and a plurality of spherical sampling bins are arranged on the outer side of each vertical plate; the spherical sampling bin comprises a hollow spherical main body, one side of the spherical main body is opened to form a sampling port communicated with the interior, an opening interlayer is further arranged between the inner wall and the outer wall of the spherical main body, arc-shaped baffles are arranged in the opening interlayer, and the arc-shaped baffles are all movable parts so as to achieve the purposes that the arc-shaped baffles can be collected into the spherical main body; or extends out of the sampling opening to form a sealing plate for sealing the spherical main body in a matching manner; and rotating control plates are arranged on the arc-shaped baffles in pairs. According to the utility model, the spherical sampling bin can be automatically closed after sampling is completed, so that samples are prevented from being lost or polluted by the external environment, and the effectiveness and the safety of the collected samples are further ensured.

Description

Technical Field

[0001] This utility model relates to the field of exploration technology, specifically a well sampling device for loess areas. Background Technology

[0002] In the process of geological exploration, exploration wells are often set up to assist in the collection of soil or rock samples based on the analysis of data such as soil and strata.

[0003] The soil in the Loess Plateau is loose and porous. After well drilling, when soil samples need to be taken from the well walls for data analysis, current sampling devices often have open sample chambers. During collection and retrieval, the loose nature of the samples makes them prone to leakage from the openings, affecting the sample volume. Furthermore, the loess in some areas is quite moist and sticky; after collection, the samples are easily detached, either as a whole or by adhering to the surrounding soil, increasing the difficulty of collection. Additionally, the open design exposes the samples to the external environment after collection, making them highly susceptible to environmental changes that can affect subsequent data analysis and lead to biases. While some existing structures can achieve sealed sample chambers, these are often complex and require external electrical components, making them less practical.

[0004] Therefore, the present invention aims to provide a sampling structure that can easily open and close the sample chamber, thereby ensuring the sample collection volume and preventing sample loss. Utility Model Content

[0005] The purpose of this invention is to provide a well sampling device for loess areas. This well sampling device can automatically seal the spherical sampling chamber after sampling to avoid sample loss or contamination by the external environment, thereby ensuring the effectiveness and safety of the collected samples.

[0006] The purpose of this utility model is mainly achieved through the following technical solution: a well sampling device for loess areas, comprising a pair of vertical plates arranged at relatively intervals, the pair of vertical plates being connected by at least one bidirectional electric cylinder, and each vertical plate having several detachable spherical sampling chambers spaced apart along the vertical direction on its outer side; each spherical sampling chamber includes a hollow spherical body, with an opening on one side of the spherical body forming a sampling port communicating with the interior, and an open interlayer provided between the inner and outer walls of the spherical body, with at least two arc-shaped baffles provided within the open interlayer. Both arc-shaped baffles are movable components to achieve either retraction into the spherical body or extension to the sampling port to form a sealing plate for closing the spherical body. Each arc-shaped baffle is paired with a rotation control plate. One end of the rotation control plate extends into the open interlayer and can lock the paired arc-shaped baffles inside the spherical body. The other end of the rotation control plate extends into the interior of the spherical body. When a sample enters the spherical sampling chamber and squeezes the rotation control plate, the rotation control plate rotates to release the locking state of the paired arc-shaped baffles and extend to the sampling port.

[0007] Based on the above technical solution, each of the arc-shaped baffles is paired with a compression spring, and the arc-shaped baffles and compression springs are arranged sequentially from the outside to the inside on the inner side of the open interlayer.

[0008] Based on the above technical solution, the rotation control plate is provided with a rotating shaft between its two ends, and a torsion spring is sleeved on the rotating shaft. The torsion spring stores or releases elastic force as the rotating shaft rotates. When the arc-shaped baffle is retracted into the spherical body, the elastic force of the torsion spring and the compression spring are equal.

[0009] Based on the above technical solution, a trapezoidal groove is also provided in the side wall of the open interlayer inside the spherical body, and a trapezoidal slider is also provided in the side wall of one end of the arc-shaped baffle located inside the interlayer. The trapezoidal slider is matched with the trapezoidal groove to restrict sliding in the trapezoidal groove.

[0010] Based on the above technical solution, the end of the rotation control plate that extends into the open interlayer and the end of the trapezoidal slider are both set as spherical structures; when the rotation control plate is retracted into the spherical body, the end of the rotation control plate that extends into the open interlayer is stuck on the outer wall of the trapezoidal slider.

[0011] Based on the above technical solution, the end of the rotation control plate that extends into the spherical body forms a spoon head structure.

[0012] Based on the above technical solution, the spherical body is also provided with a threaded hole that communicates with the interior of the spherical body. The threaded hole is positioned opposite to the sampling port and is located on the same axis. A plug is threadedly connected to the threaded hole.

[0013] Based on the above technical solution, a second sampling cylinder is also provided inside the spherical body; one end of the second sampling cylinder is flush with and open to the sampling port, and the other end of the second sampling cylinder is connected to the threaded hole.

[0014] Based on the above technical solution, the plug is sequentially formed with a first external threaded connector, an external hexagonal transition section and a second external threaded connector. The first external threaded connector is threadedly connected to the threaded hole, and the second external threaded connector is threadedly connected to the vertical plate.

[0015] Based on the above technical solution, the well sampling device also includes a support assembly, which includes a crossbeam and a support plate connected to the crossbeam. A lifting electric cylinder is provided in the middle of the crossbeam. The lifting rod of the lifting electric cylinder passes vertically through the crossbeam and is connected to a connecting frame. The cylinder body of the bidirectional electric cylinder is fixed on the connecting frame.

[0016] Based on the above technical solution, all of the spherical sampling chambers are set at different heights in the vertical direction.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The overall structure of this utility model is simple. When sampling is required, the bidirectional electric cylinder can extend and retract synchronously to press the spherical sampling chamber into the soil on the side wall of the exploration well for sampling. After sampling, the arc-shaped baffle can be pushed out under the pressure of the sample and extend to the sampling port to seal the entire spherical sampling chamber. This can be achieved without the assistance of external electrical components, thereby ensuring that the internal sample will not be lost or directly come into large-area contact with the outside, ensuring the amount of sample collected, and guaranteeing the integrity, effectiveness and safety of the sample. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a schematic diagram of the spherical sampling chamber in this embodiment;

[0021] Figure 3 This is a schematic diagram of the structure in which the arc-shaped baffle in the spherical sampling chamber is in a locked state;

[0022] Figure 4 This is a schematic diagram of the structure of the arc-shaped baffle in the spherical sampling chamber in the unlocked state;

[0023] Figure 5 This is a schematic diagram of the rotation control panel;

[0024] Figure 6 yes Figure 2 Enlarged view of the structure at point A in the middle.

[0025] The labels in the diagram represent:

[0026] 1. Vertical plate; 2. Two-way electric cylinder; 3. Spherical sampling chamber; 4. Spherical body; 5. Sampling port; 6. Opening interlayer; 7. Arc-shaped baffle; 8. Rotation control plate; 9. Compression spring; 10. Rotating shaft; 11. Trapezoidal slide; 12. Trapezoidal slider; 13. Threaded hole; 14. Plug; 15. Crossbeam; 16. Support plate; 17. Lifting electric cylinder; 18. Connecting frame; 19. Second sampling cylinder. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0028] like Figure 1-6 As shown, this utility model embodiment provides a well sampling device for loess areas, including a pair of vertical plates 1 arranged at relatively intervals, connected by at least one bidirectional electric cylinder 2. Each vertical plate 1 has several detachable spherical sampling chambers 3 arranged at intervals along the vertical direction on its outer side. Each spherical sampling chamber 3 includes a hollow spherical body 4, with an opening on one side forming a sampling port 5 communicating with the interior. An open interlayer 6 is also provided between the inner and outer walls of the spherical body 4, and at least two arc-shaped baffles 7 are provided within the open interlayer 6. All baffles 7 are movable parts to achieve the following: they can be retracted into the spherical body 4 or extended into the sampling port 5 to form a sealing plate for closing the spherical body 4; each of the arc-shaped baffles 7 is paired with a rotation control plate 8, one end of which extends into the open interlayer 6 and can lock the paired arc-shaped baffles 7 into the spherical body 4; the other end of which extends into the interior of the spherical body 4. When a sample enters the spherical sampling chamber 3 and squeezes the rotation control plate 8, the rotation control plate 8 rotates to release the locking state of the paired arc-shaped baffles 7 and extend into the sampling port 5.

[0029] In application, the bidirectional electric cylinder 2 can be fixed to the external structure (such as the bracket assembly described later) to support the overall structure. When needed, ensure that the arc-shaped baffle 7 is locked inside the spherical body 4 in the initial state, lower the pair of vertical plates 1 to the required height of the well, and activate the bidirectional electric cylinder 2 to extend. Simultaneously, it drives the vertical plates 1 on both sides to press against the well wall and extend into the soil for sampling. During the sampling process, the soil sample inside the spherical sampling chamber 3 increases and gradually compresses the rotation control plate 8, causing it to rotate. After the rotation control plate 8 rotates, its position changes, causing the arc-shaped baffle 7 to release its lock. The spherical sampling chamber 3 extends to the sampling port 5. At this point, because it is still inside the soil, the arc-shaped baffle 7 will not fully extend to the sampling port 5 due to the soil obstruction. After it extends further and completes the sampling, the bidirectional electric cylinder 2 is activated to retract, and the spherical sampling chamber 3 retracts. During the retraction process, because the sampling port 5 loses soil resistance, the arc-shaped baffle 7 slowly extends to the sampling port until all the arc-shaped baffles 7 are paired with each other to form a complete arc-shaped closed plate structure, thereby sealing the entire spherical sampling chamber 3. After the entire vertical plate 1 is removed from the well, the spherical sampling chamber 3 can also be removed as a whole, making it more convenient to collect samples.

[0030] When the sample collection in the spherical sampling chamber 3 is completed and needs to be reused, use external force to squeeze the arc-shaped baffle 7 back into the open interlayer 6 and lock it, and then install it on the vertical plate 1 for reuse.

[0031] Based on this, the overall structure of the well sampling device in this embodiment is simple. It can sample soil at different heights on the sidewall of the well based on the analysis needs. After sampling, the spherical sampling chamber 3 can be automatically sealed based on the arc baffle 7 design to ensure the isolation effect of the soil sample inside, avoid it from being contaminated or damaged by the external environment, and at the same time ensure that the soil sample inside will not be lost, ensure the weight of the collected sample, avoid secondary collection, and ensure the integrity, effectiveness and safety of the sample.

[0032] In practical implementation, two bidirectional electric cylinders 2 are arranged side by side at intervals, with each of the two bidirectional electric cylinders 2 located on the inner side of one end of a pair of vertical plates 1. Furthermore, based on the combined squeezing action of the two bidirectional electric cylinders 2, it can be ensured that all spherical sampling chambers 3 are subjected to uniform force, enabling synchronous sampling operations of all spherical sampling chambers 3.

[0033] In practical implementation, four arc-shaped baffles 7 are provided. When extended to the sampling port 5, the four arc-shaped baffles 7 can be completely spliced ​​together to form a complete arc-shaped spherical structure. Furthermore, both the spherical body 4 and the arc-shaped baffles 7 are made of stainless steel, which can effectively solve problems such as corrosion and bending damage, and facilitate long-term use.

[0034] like Figure 3 , Figure 4As shown, to ensure that the arc-shaped baffle 7 can extend freely and quickly into the open interlayer 6, each of the arc-shaped baffles 7 in this embodiment is paired with a compression spring 9. The arc-shaped baffles 7 and the compression springs 9 are arranged sequentially from the outside to the inside of the open interlayer 6. In the initial state, when the arc-shaped baffle 7 is locked, the compression spring 9 is in a compressed state. Then, when the arc-shaped baffle 7 is released from the locked state, the compression spring 9 restores its deformation and drives the arc-shaped baffle 7 to move towards the opening of the open interlayer 6, thereby enabling the arc-shaped baffle 7 to automatically extend to the sampling port 5.

[0035] In one specific implementation, the compression spring 9 is an arc-shaped spring.

[0036] like Figure 5 As shown, when the arc-shaped baffle 7 is locked, it will always exert a force toward the sampling port 5 due to the compression action of the compression spring 9. Therefore, in order to ensure the stability of the locked state of the arc-shaped baffle 7, this embodiment provides a specific rotation control plate 8, which is specifically: the rotation control plate 8 is provided with a rotating shaft 10 between its two ends, and a torsion spring (not shown in the figure) is sleeved on the rotating shaft 10. The torsion spring stores or releases its elastic force as the rotating shaft 10 rotates. When the arc-shaped baffle 7 is retracted into the spherical body 4, the elastic force of the torsion spring and the compression spring 9 are equal.

[0037] Based on this, when the arc-shaped baffle 7 is locked, the torsion of the torsion spring can balance the elastic force of the compression spring 9, thus keeping the rotation control plate 8 locked and unable to rotate around the axis 10. When sampling, the compression of the sample inside the spherical body 4 causes the rotation control plate 8 to be subjected to the sample compression force, thereby offsetting part of the torsion spring force. As the torsion spring force continues to decrease, the rotation control plate 8 will rotate around the axis 10, and the end locked with the arc-shaped baffle will shift and be misaligned with the arc-shaped baffle 7, thus losing the locking effect on the arc-shaped baffle 7. At this time, under the action of the compression spring 9, the arc-shaped baffle 7 can be continuously pushed until it extends to the sampling port 5, realizing the automatic extension of the arc-shaped baffle 7.

[0038] As one specific implementation method, one end of the torsion spring is fixed on the rotating shaft 10, and the other end is fixed inside the spherical body 4, so that the rotating shaft 10 can continuously reciprocate and be used for a long time.

[0039] As one specific implementation, a trapezoidal groove 11 is provided inside the spherical body 4 on the side wall of the open interlayer 6, and a trapezoidal slider 12 is provided on the side wall of one end of the arc-shaped baffle 7 located inside the open interlayer 6. The trapezoidal slider 12 is matched with the trapezoidal groove 11 to restrict its sliding within the trapezoidal groove 11. In use, in order to ensure that the trajectory of the arc-shaped baffle 7 is controllable and does not shift, this embodiment uses the paired trapezoidal slider 12 and trapezoidal groove 11 to ensure that it can slide towards the opening direction of the open interlayer 6. At the same time, based on the cooperation between the two, the arc-shaped baffle 7 can also be positioned inside the open interlayer 6.

[0040] It should be noted that the cross-sections of the trapezoidal groove 11 and the trapezoidal slider 12 are both trapezoidal structures, which are used to form a pair without affecting the sliding of the trapezoidal slider 12. The structure of the trapezoidal slider and the trapezoidal groove are all existing technologies, and the specific pairing method and structure will not be described in this embodiment.

[0041] As one specific implementation, the end of the rotation control plate 8 that extends into the open interlayer 6 and the end of the trapezoidal slider 12 are both configured as spherical structures; when the rotation control plate 8 is retracted into the spherical body 4, the end of the rotation control plate 8 that extends into the open interlayer 6 is stuck on the outer wall of the trapezoidal slider 12.

[0042] As one specific implementation, both the rotation control plate 8 and the rotating shaft 10 are made of stainless steel.

[0043] In the locked state, the end of the rotation control plate 8 is just stuck on the outer wall of the trapezoidal slider 12, which can prevent it from popping out. When the lock is released, based on the spherical structure at the ends of the two, it can be easily ensured that the arc baffle 7 can slide more smoothly over the locked end of the rotation control plate 8, better achieve the misalignment of the two, and when it is necessary to lock again, it can also better push the arc baffle 7 back to the initial locked position.

[0044] It should be noted that, in this embodiment, the outer wall of the trapezoidal slider 12 refers to the side wall of the trapezoidal slider 12 facing the opening direction of the open interlayer 6.

[0045] In one specific implementation, the end of the rotation control plate 8 extending into the spherical body 4 forms a spoon-shaped structure. To ensure that the rotation control plate 8 can react quickly and rotate under the pressure of the soil sample to release the locking state of the arc-shaped baffle 7, this embodiment sets the end of the rotation control plate 8 located in the cavity inside the spherical body 4 as a spoon-shaped structure, thereby forming a flat and concave container structure. This results in a large contact area between the soil sample and the spoon-shaped structure, and better concentration of the soil sample to ensure the pressure required for rotation. Consequently, the rotation control plate 8 can respond quickly to the action to release the locking state of the arc-shaped baffle 7, ensuring that the arc-shaped baffle 7 extends and guaranteeing the stability of the overall device.

[0046] like Figure 6 As shown, the spherical body 4 is also provided with a threaded hole 13 that communicates with the interior of the spherical body 4. The threaded hole 13 is disposed opposite to the sampling port 5 and located on the same axis. A plug 14 is threadedly connected to the threaded hole 13.

[0047] When applying the soil sample, if it needs to be transferred after being removed, the curved baffle 7 needs to be returned to its original position due to its closed state. During this process, improper operation can easily cause the entire spherical body 4 to tip over, resulting in sample loss, affecting the sample collection volume, and is also somewhat troublesome. Based on this, this embodiment sets a threaded hole 13 to achieve communication with the internal cavity of the spherical body 4. When sampling is needed, it can be done through the threaded hole 13, and when sampling is not needed, it can be sealed with a plug 14 to ensure the safety and stability of the internal sample and prevent leakage or excessive contact with the external environment.

[0048] Based on this, the plug 14 sequentially forms a first external threaded connector, an external hexagonal transition section, and a second external threaded connector. The first external threaded connector is threadedly connected to the threaded hole 13, and the second external threaded connector is threadedly connected to the vertical plate 1. Furthermore, the plug 14 in this embodiment can simultaneously seal the threaded hole 13 and achieve a detachable connection with the vertical plate 1, achieving two goals at once and further simplifying the overall structure.

[0049] In specific sampling, in some work, it is necessary to distinguish the four directions of soil sample: "up, down, front, and back". That is, the sample needs to be taken according to the internal and external structure or layers of the soil.

[0050] Furthermore, to ensure the smooth implementation of the sampling, in this embodiment, a second sampling cylinder 19 is also provided inside the spherical body 4; one end of the second sampling cylinder 19 is flush with and open to the sampling port 5, and the other end of the second sampling cylinder 19 is connected to the threaded hole 13. When sampling, after the soil layer enters the interior of the spherical body 4, the sample in the middle can directly enter the second sampling cylinder 19, so that the soil sample inside can be collected according to the layers.

[0051] When it is necessary to remove the soil sample from the second sampling tube 19, the plug 14 can be opened directly to complete the process without damaging the soil sample layers.

[0052] It should be noted that the end of the second sampling tube 19 that is flush with the sampling port 5, as well as the spherical body 4 at the sampling port 5, can be set as a cutting edge structure to facilitate cutting into the soil layer for sampling.

[0053] like Figure 1 As shown, the well sampling device also includes a support assembly, which includes a crossbeam 15 and a support plate 16 connected to the crossbeam 15. A lifting electric cylinder 17 is provided in the middle of the crossbeam 15. The lifting rod of the lifting electric cylinder 17 vertically passes through the crossbeam 15 and is connected to a connecting frame 18. The cylinder body of the bidirectional electric cylinder 2 is fixed on the connecting frame 18.

[0054] In application, in order to ensure the stability of the overall sampling device, this embodiment uses a support assembly for stable support. During construction, the vertical plate 1 extends into the well a certain distance and supports the support plate 16 on the outside of the well opening. When it is necessary to collect a sample, the lifting electric cylinder 17 is activated to lower the vertical plate 1 to the designed depth, and then the bidirectional electric cylinder 2 is activated to realize the collection.

[0055] As one specific implementation method, a controller is also provided on the crossbeam 15, which is signal-connected to both the lifting electric cylinder 17 and the bidirectional electric cylinder 2. Therefore, the controller can control the operation of both, achieving intelligent sample collection.

[0056] In application, all the spherical sampling chambers 3 are set at different vertical heights. To increase the amount of data collected in a single sampling, all the spherical sampling chambers 3 in this embodiment are set at different vertical heights, thus multiple spherical sampling chambers 3 correspond to different sampling depths. In a single sampling, sample data can be collected over a larger depth range within the well, improving sampling efficiency.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for sampling a test well in a loess region, characterized in that, It includes a pair of vertical plates arranged at relatively intervals, the pair of vertical plates being connected by at least one bidirectional electric cylinder, and each of the vertical plates having several detachable spherical sampling chambers spaced apart along the vertical direction on its outer side; in, The spherical sampling chamber includes a hollow spherical body with an opening on one side to form a sampling port communicating with the interior. An open interlayer is also provided between the inner and outer walls of the spherical body. At least two arc-shaped baffles are provided in the open interlayer. Both arc-shaped baffles are movable parts to achieve either retraction into the spherical body or extension to the sampling port to cooperate in forming a sealing plate for closing the spherical body. Each of the arc-shaped baffles is paired with a rotation control plate. One end of the rotation control plate extends into the open interlayer and can lock the paired arc-shaped baffles inside the spherical body. The other end of the rotation control plate extends into the interior of the spherical body. When a sample enters the spherical sampling chamber and squeezes the rotation control plate, the rotation control plate rotates to release the locking state of the paired arc-shaped baffles and extends to the sampling port.

2. The device of claim 1, wherein, Each of the arc-shaped baffles is paired with a compression spring, and the arc-shaped baffles and compression springs are arranged sequentially from the outside to the inside on the inner side of the open interlayer.

3. The device of claim 2, wherein, The rotation control plate has a rotating shaft between its two ends, and a torsion spring is sleeved on the rotating shaft. The torsion spring stores or releases elastic force as the rotating shaft rotates. When the arc-shaped baffle retracts into the spherical body, the elastic force of the torsion spring and the compression spring are equal.

4. The device of claim 3, wherein, The spherical body is provided with a trapezoidal groove on the side wall of the open interlayer, and the arc-shaped baffle is provided with a trapezoidal slider on the side wall of one end of the open interlayer. The trapezoidal slider is matched with the trapezoidal groove to restrict the sliding within the trapezoidal groove.

5. The device of claim 4, wherein, The end of the rotation control plate that extends into the open interlayer and the end of the trapezoidal slider are both configured as spherical structures; when the rotation control plate is retracted into the spherical body, the end of the rotation control plate that extends into the open interlayer is stuck on the outer wall of the trapezoidal slider.

6. The device of claim 1, wherein, The end of the rotation control plate that extends into the spherical body forms a spoon-shaped structure.

7. The device of claim 1, wherein, The spherical body is also provided with a threaded hole that communicates with the interior of the spherical body. The threaded hole is positioned opposite to the sampling port and is located on the same axis. A plug is threadedly connected to the threaded hole.

8. The device of claim 7, wherein, The spherical body is also equipped with a second sampling tube inside; One end of the second sampling cylinder is flush with and open to the sampling port, while the other end of the second sampling cylinder is connected to the threaded hole.

9. The device of claim 1, wherein, The well sampling device also includes a support assembly, which includes a crossbeam and a support plate connected to the crossbeam. A lifting electric cylinder is provided in the middle of the crossbeam. The lifting rod of the lifting electric cylinder passes vertically through the crossbeam and is connected to a connecting frame. The cylinder body of the bidirectional electric cylinder is fixed on the connecting frame.

10. The device of claim 1, wherein, All of the spherical sampling chambers are set at different heights in the vertical direction.

Images