Wetland soil sampling device and sampling method thereof

Abstract

The invention discloses a wetland soil sampling device and a sampling method thereof. The sampling device comprises a drill bit; the sampling body is connected with the drill bit, and a sampling cavity communicated with the outside is defined in the sampling body; the operating rod is connected with the sampling body and is configured to be used for applying external force for inserting into or taking out the wetland soil to the drill bit; and the scraping mechanism is arranged in the sampling body in a matched manner and is configured to be capable of switching movement among a first position accommodated in the sampling cavity, a second position extending out of the sampling cavity and a third position for scraping external soil into the sampling cavity. The sampling device can be used for sampling the soil with the specified depth in the wetland soil, sampling of unnecessary soil layers on the earth surface is avoided, the sampling accuracy is improved, and the sampling device is simple to operate, convenient to sample and high in reliability.

Description

Technical Field

[0001] This invention relates to the field of wetland soil technology, and in particular to a wetland soil sampling device and sampling method. Background Technology

[0002] Wetlands are unique ecosystems on Earth with multiple functions. They not only provide humans with abundant food, raw materials, and water resources, but also play a vital role in maintaining ecological balance, preserving biodiversity and rare species resources, conserving water sources, storing floodwater and preventing drought, degrading pollution and regulating climate, replenishing groundwater, and controlling soil erosion. The texture and structural characteristics of wetland soil are direct factors determining its water storage capacity. Soil moisture is the most abundant component of the wetland water cycle and can influence water connections with different surrounding water sources. Therefore, long-term collection of information on changes in wetland soil or moisture is of great significance for understanding the overall state of wetlands and wetland environmental information. In existing technologies, wetland soil sampling often employs a straight-through tubular structure, where the lower end of the tubular structure is inserted into the wetland soil for sampling. However, the surface soil of wetlands is often covered by vegetation and other debris, which affects the accuracy of soil analysis and is generally not used in sampling. The existing sampling device samples from top to bottom, taking this portion of soil along with the rest, making it impossible to sample a specific section of the wetland soil. This significantly reduces the accuracy of soil sampling. Furthermore, since wetland soil may contain hard materials (such as rocks), the sampling device may be damaged during the sampling process. Summary of the Invention

[0003] This solution addresses the problems and needs raised above by proposing a wetland soil sampling device and its sampling method. Due to the adoption of the following technical features, it can achieve the above-mentioned technical objectives and bring about several other technical effects.

[0004] One object of the present invention is to provide a wetland soil sampling device, comprising: drill; The sampling body is connected to the drill bit and has an internally defined sampling cavity that communicates with the outside. A joystick, connected to the sample body, is configured to apply an external force to the drill bit for inserting or removing wetland soil; The scraping mechanism, adapted in the sampling body, is configured to switch between a first position housed in the sampling cavity, a second position extending out of the sampling cavity, and a third position scraping external soil into the sampling cavity.

[0005] In this technical solution, when using the sampling device, firstly, the control lever is driven to insert the sampling body and the drill bit together into the wetland soil to a specified depth; then, the scraping mechanism is driven to move from the first position to the second position, so that the scraping mechanism extends from the sampling chamber into the wetland soil; then, the scraping mechanism is driven to move from the second position to the third position, scraping the wetland soil outside the sampling chamber into the sampling chamber; next, the control lever is driven to remove the sampling body from the wetland soil, and the scraping mechanism is driven to switch sequentially from the third position to the second position, and then from the second position to the first position, finally removing the wetland soil from the sampling chamber; the above sampling device can sample soil at a specified depth in the wetland soil, avoiding sampling of unnecessary soil layers on the surface, improving the sampling accuracy, and the sampling device is simple to operate, convenient to sample, and highly reliable.

[0006] In addition, the wetland soil sampling device and sampling method according to the present invention may also have the following technical features: In one example of the present invention, the scraping mechanism includes: A drive rod is sequentially inserted through the control rod and the sampling body along the extension direction of the control rod; At least one telescopic scraper, the telescopic scraper having a cylinder and a scraper retractable within the cylinder, the cylinder having a first connection point and a second connection point, wherein the first connection point is hinged to the drive rod and the second connection point is hinged to the sampling body, such that the telescopic scraper can rotate around the hinge point with the second connection point as the center under the drive of the drive rod to switch between a first position or a second position and a third position.

[0007] In one example of the invention, the scraping mechanism further includes: An elastic element, connected between the sampling body and the drive rod, is configured such that when the telescopic scraper moves from a first position or a second position to a third position, the telescopic scraper generates a tendency force to return to the first position or the second position.

[0008] In one example of the present invention, the elastic element is one of a compression spring, a tension spring, and a spring sheet.

[0009] In one example of the present invention, the sampling body has a mounting cavity coaxially arranged with the driving rod, and the elastic element is installed in the mounting cavity and sleeved on the driving rod; wherein, one end of the elastic element is fixed relative to the mounting cavity, and the other end of the elastic element is fixed relative to the driving rod.

[0010] In one example of the present invention, the telescopic scraper is installed at the upper end near the sampling chamber, and the telescopic scraper is driven to switch from the second position to the third position by the upward movement of the drive rod; or The telescopic scraper is installed at the lower end near the sampling chamber, and the drive rod moves downward to drive the telescopic scraper to switch from the second position to the third position.

[0011] In one example of the present invention, the telescopic scraper includes at least two, which are symmetrically installed at the upper and lower ends of the sampling chamber, respectively; The drive rod includes a first rod portion and a second rod portion detachably connected thereto, wherein a telescopic scraper installed at the upper end of the sampling chamber is connected to the first rod portion, and a telescopic scraper installed at the lower end of the sampling chamber is connected to the second rod portion.

[0012] In one example of the present invention, the first rod portion and the second rod portion are connected by a first electromagnet assembly; wherein, the first electromagnet assembly includes a first magnetic sheet fixedly connected to the first rod portion and a second magnetic sheet fixedly connected to the second rod portion, and when the first electromagnet assembly is energized, the first magnetic sheet and the second magnetic sheet attract each other; when the first electromagnet assembly is de-energized, the first magnetic sheet and the second magnetic sheet separate.

[0013] Another object of the present invention is to provide a sampling method for the wetland soil sampling device described in any one of the above claims, comprising the following steps: S10: Drive the joystick to insert the sample body and the drill bit together into the wetland soil at a specified depth; S20: Drive the scraping mechanism to move from the first position to the second position, so that the scraping mechanism extends from the sampling chamber into the wetland soil, and then continue to drive the scraping mechanism to move from the second position to the third position, scraping the wetland soil outside the sampling chamber into the sampling chamber; S30: Drive the control lever to remove the sample from the wetland soil, and drive the scraping mechanism to switch from the third position to the second position in sequence, and then switch from the second position to the first position, and finally remove the wetland soil from the sampling chamber.

[0014] Another object of the present invention is to provide a sampling method for a wetland soil sampling device as described above, comprising the following steps: S110: Drive the joystick to insert the sample body and the drill bit together into the wetland soil at a specified depth; S120: Drive the telescopic scraper located at the lower end of the mounting cavity to extend the scraper relative to the cylinder body to complete the switching from the first position to the second position, so that the scraper extends into the wet soil outside the sampling cavity. Drive the drive rod to move downward to switch the telescopic scraper located at the lower end of the mounting cavity from the second position to the third position, scraping the wet soil outside the sampling cavity into the sampling cavity. S130: Separate the first rod part and the second rod part of the drive rod, wherein the first rod part returns to the initial position under the elastic force of the elastic element, and the second rod part keeps the telescopic scraper in the third position; S140: Drive the telescopic scraper located at the upper end of the mounting cavity to extend the scraper relative to the cylinder body to complete the switch from the first position to the second position, so that the scraper extends into the wet soil outside the sampling cavity, and drive the drive rod to move upward so that the telescopic scraper located at the upper end of the mounting cavity switches from the second position to the third position, scraping the wet soil outside the sampling cavity into the sampling cavity. S150: Drive the control lever to remove the sample from the wetland soil. The telescopic scraper located at the upper end of the mounting cavity returns from the third position to the second position under the action of the elastic element. Then drive the telescopic scraper to make the scraper retract relative to the cylinder to complete the switch from the second position to the first position. S160: Drive the drive rod downward to connect the first rod part with the second rod part, continue to drive the drive rod upward to switch the telescopic scraper located at the lower end of the mounting cavity from the third position to the second position, drive the telescopic scraper located at the lower end of the mounting cavity to make the scraper retract relative to the cylinder to complete the switch from the second position to the first position; finally, take out the wet soil in the sampling cavity.

[0015] The preferred embodiments of the invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of a wetland sampling device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the scraping mechanism in the sample body (first position) according to one embodiment of the present invention. Figure 3 A side view (first position) of the scraping mechanism in the sample body according to one embodiment of the present invention. Figure 4This is a schematic diagram of the scraping mechanism in the sample body according to one embodiment of the present invention (second position). Figure 5 This is a schematic diagram (third position) of the scraping mechanism in the sample body according to one embodiment of the present invention. Figure 6 This is a schematic diagram of the scraping mechanism in the sample body (first position) according to another embodiment of the present invention. Figure 7 This is a schematic diagram of the scraping mechanism in the sample body (second position) according to another embodiment of the present invention. Figure 8 This is a schematic diagram (third position) of the scraping mechanism in the sample body according to another embodiment of the present invention. Figure 9 This is a schematic diagram of the scraping mechanism in the sample body (first position) according to another embodiment of the present invention. Figure 10 This is a schematic diagram of the scraping mechanism in the sampling body according to another embodiment of the present invention (the telescopic scraper located at the lower end of the sampling chamber is in the third position). Figure 11 This is a schematic diagram of the scraping mechanism in the sampling body according to another embodiment of the present invention (the telescopic scraper located at the upper end of the sampling chamber is in the third position). Figure 12 This is a control principle diagram of a wetland soil sampling device according to an embodiment of the present invention; Figure 13 A flowchart of a sampling method using a wetland sampling device according to one embodiment of the present invention; Figure 14 This is a flowchart of a sampling method for a wetland sampling device according to another embodiment of the present invention.

[0018] List of reference numerals in the attached diagram: Sampling device 100; Drill bit 110; Threaded hole 111; 120 samples were taken. Sampling chamber 121; Mounting cavity 122; Stud 123; Joystick 130; Control handle 131; Control cavity 132; Scraping mechanism 140; Drive lever 141; First section 1411; Second section 1412; Telescopic scraper 142; Main body 1421; Cylinder block 14211; Scraper 14212; Connecting part 1422; First connection point 142A; Second connection point 142B; Elastic component 143; 144 protrusions; 150 monitoring sensors; Controller 160; Battery assembly 170; First electromagnet assembly 180; First magnetic plate 181; Second magnetic plate 182; Second electromagnet assembly 190; Third magnetic plate 191; Fourth magnetic plate 192. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0021] According to a first aspect of the present invention, a wetland soil sampling device 100, such as... Figure 1 As shown, it includes: Drill bit 110; for example, drill bit 110 has a conical structure. The conical drill bit 110 can facilitate the sampling device 100 to drill into the wet soil. Moreover, because the pointed structure of drill bit 110 can reduce the contact area between the hard soil clumps and drill bit 110 when the drill bit 110 is inserted into the wet soil, it can avoid damage to the sampling device 100 and protect the sampling device 100. The sampling body 120 is connected to the drill bit 110 and internally defines a sampling chamber 121 that communicates with the outside. That is, the sampling body 120 and the drill bit 110 are drilled into the wetland soil together, which facilitates the sampling of wetland soil into the sampling chamber 121. Preferably, the drill bit 110 and the sampling body 120 can be connected by threads. For example, a stud 123 is provided at the lower end of the sampling body 120, and a threaded hole 111 that matches the stud is provided on the drill bit 110. The threaded connection facilitates the assembly and disassembly of the drill bit 110 and the sampling body 120 and has high reliability.

[0022] The control lever 130, connected to the sampling body 120, is configured to apply an external force to the drill bit 110 for inserting or removing wetland soil. For example, a control handle 131 is provided on the control lever 130, through which an external force load is applied to the drill bit 110, thereby facilitating the insertion of the drill bit 110 into the wetland soil. Similar to the connection between the drill bit 110 and the sampling body 120, the sampling body 120 and the control lever 130 can also be connected by a threaded connection. Of course, the invention is not limited to this, and a fixed connection between the two can also be achieved by fasteners. For another example, the control lever 130 can be driven manually.

[0023] The scraping mechanism 140 is adapted to the sampling body 120 and configured to switch between a first position where it is housed in the sampling cavity 121, a second position where it extends out of the sampling cavity 121, and a third position where it scrapes external soil into the sampling cavity 121.

[0024] When using the sampling device 100, firstly, the control lever 130 is driven to insert the sampling body 120 and the drill bit 110 together into the wetland soil to a specified depth; then, the scraping mechanism 140 is driven to move from the first position to the second position, so that the scraping mechanism 140 extends from the sampling chamber 121 into the wetland soil; then, the scraping mechanism 140 is driven to move from the second position to the third position, scraping the wetland soil outside the sampling chamber 121 into the sampling chamber 121; next, the control lever 130 is driven to remove the sampling body 120 from the wetland soil, and the scraping mechanism 140 is driven to switch sequentially from the third position to the second position, and then from the second position to the first position, finally removing the wetland soil from the sampling chamber 121; the above-mentioned sampling device 100 can sample soil at a specified depth in the wetland soil, avoiding sampling of unnecessary soil layers on the surface, improving the accuracy of sampling, and the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0025] Preferably, the sampling chamber 121 is a cavity structure open at both ends, wherein the upper end is recessed upward to facilitate the installation of the scraping mechanism 140, and the lower end is recessed downward to facilitate the collection of scraped wetland soil.

[0026] In one example of the present invention, the scraping mechanism 140 includes: A drive rod 141 passes through the control rod 130 and the sampling body 120 sequentially along the extension direction of the control rod 130. For example, a control cavity 132 is provided in the control rod 130, and the drive rod 141 is installed in the control cavity 132, thereby supporting and guiding the drive rod 141. Correspondingly, a mounting cavity 122, which is coaxially arranged with the control cavity 132 as described below, is provided in the sampling body 120.

[0027] At least one telescopic scraper 142, the telescopic scraper 142 having a cylinder 14211 and a scraper 14212 retractable within the cylinder 14211, the cylinder 14211 having a first connection point 142A and a second connection point 142B, wherein the first connection point 142A is hinged to the drive rod 141, and the second connection point 142B is hinged to the sampling body 120, so that the telescopic scraper 142 can rotate around the hinge point with the second connection point 142B as the center under the drive of the drive rod 141 to achieve switching between a first position or a second position and a third position; Specifically, when using the sampling device 100, firstly, the control lever 130 is driven so that the sampling body 120 and the drill bit 110 are inserted together into the wetland soil to a specified depth; then, at least one telescopic scraper 142 is driven so that the scraper 14212 extends from inside the cylinder 14211 to outside the cylinder 14211, i.e., moves from the first position to the second position, so that the scraper 14212 extends from the sampling chamber 121 into the wetland soil; then, the drive lever 141 is driven to move along the extension direction of the drive lever 141 so that it moves from the second position to the third position, scraping the wetland soil outside the sampling chamber 121 into the sampling chamber 121; then... The drive lever 130 removes the wetland soil from the sampling body 120. First, the drive lever 141 moves along its extension direction, causing the telescopic scraper 142 to switch from the third position to the second position. Then, the scraper 14212 of the telescopic scraper 142 retracts from the extended position to the retracted position, i.e., the second position, and switches back to the first position. Finally, the wetland soil in the sampling chamber 121 is removed. This sampling device 100 can sample soil at a specified depth in wetland soil, avoiding sampling of unnecessary soil layers on the surface, thus improving the accuracy of sampling. Moreover, the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0028] Preferably, to further improve the scraping ability of the telescopic scraper 142 in scraping wetland soil, both the cylinder body 14211 and the scraper 14212 connected thereto can be designed as plate-like structures, and the scraper 14212 can be designed as spikes; wherein, the scraper 14212 and the cylinder body 14211 can be connected by one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, so that the scraper 14212 extends or retracts into the cylinder body 14211 under the push of the hydraulic cylinder, pneumatic cylinder, or electric push rod; for example, the cylinder body The cylinder 14211 and the scraper 14212 are connected by an electric push rod. The base end of the electric push rod is connected to the cylinder 14211, and the telescopic end of the electric push rod is connected to the scraper 14212. Of course, the present invention is not limited to this. The telescopic scraper 142 itself can also be a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, etc. The telescopic scraper 142 with the above structure can make the scraper 14212 extend into or out of the wet soil. In order to facilitate the scraper 14212 to extend into the wet soil, the free end of the scraper 14212 can be designed as a spike-like structure.

[0029] In one embodiment of the present invention, the telescopic scraper 142 includes: a main body 1421 and a connecting part 1422 connected thereto, wherein the main body 1421 and the connecting part 1422 form an obtuse angle, a first connection point 142A and a second connection point 142B are provided on the connecting part 1422, and the first connection point 142A is located at the opposite end of the end connected to the main body 1421, and the second connection point 142B is located at the connection between the main body 1421 and the connecting part 1422; preferably, in order to facilitate the connection between the first connection point 142A and the second connection point 142B and the drive rod 141 and the sampling chamber 121 respectively, pivot lugs are provided on the first connection point 142A, the second connection point 142B, and the corresponding drive rod 141 and the inner wall of the sampling chamber 121 and are connected by pins.

[0030] In other words, the main body 1421 includes the cylinder 14211 and a scraper 14212 that can be extended and retracted within the cylinder 14211. The main body 1421 is mainly used for collecting wetland soil.

[0031] More preferably, the main body 1421 and the connecting part 1422 form an obtuse angle, such that the main body 1421 is inclined downward or upward; for example, when the telescopic scraper 142 is located at the upper end of the sampling chamber 121, the main body 1421 is inclined downward; when the telescopic scraper 142 is located at the lower end of the sampling chamber 121, the main body 1421 is inclined upward, thereby facilitating the telescopic scraper 142 to scrape external wetland soil.

[0032] Preferably, the included angle between the main body portion 1421 and the connecting portion 1422 is between 130 degrees and 160 degrees.

[0033] It is understood that the sampling device 100 also includes a battery assembly 170, which is mounted in the control lever 130 and coupled to the scraping mechanism 140. The battery assembly 170 provides a power source for the extension and retraction of the scraping mechanism 140, and also provides operating voltage to other components to maintain the normal operation of the sampling device 100. For example, multiple receiving cavities are formed in the circumferential direction of the control lever 130, and these cavities are used to house corresponding battery assemblies 170.

[0034] In one example of the invention, the scraping mechanism 140 further includes: An elastic element 143 is connected between the sampling body 120 and the drive rod 141 and is configured such that when the telescopic scraper 142 moves from a first position or a second position to a third position, the telescopic scraper 142 generates a tendency force to return to the first position or the second position. When using the sampling device 100, firstly, the control lever 130 is driven so that the sampling body 120 and the drill bit 110 are inserted together into the wetland soil to a specified depth; then, at least one telescopic scraper 142 is driven so that the scraper 14212 extends from inside the cylinder 14211 to outside the cylinder 14211, i.e., moves from the first position to the second position, so that the scraper 14212 extends from the sampling chamber 121 into the wetland soil. Then, the drive lever 141 is driven to move along the extension direction of the drive lever 141 so that it moves from the second position to the third position, scraping the wetland soil outside the sampling chamber 121 into the sampling chamber 121. During this process, the elastic force of the elastic element 143 causes the drive lever 141 to generate a tendency force to return to the initial position (first position or second position); then the control lever 130 is driven. 30. The sample body 120 is removed from the wetland soil. First, the drive rod 141 resumes its movement along the extension direction of the drive rod 141 under the action of the elastic element 143, causing the telescopic scraper 142 to switch from the third position to the second position. Then, the scraper 14212 of the telescopic scraper 142 retracts from the extended position to the retracted position, i.e., the second position, and switches back to the first position. Finally, the wetland soil in the sampling chamber 121 is removed. By setting the elastic element 143, the drive rod 141 can easily return to the initial state after driving the telescopic scraper 142 to rotate, which facilitates repeated operation of the telescopic scraper 142. Moreover, the elastic element 143 can also buffer the drive rod 141 during the movement, and protect the drive rod 141 and the telescopic scraper 142 connected to it.

[0035] In one example of the present invention, the elastic element 143 is one of a compression spring, a tension spring, and a spring sheet; all three can realize the reset function of the drive rod 141, and the detailed connection structure is described below.

[0036] In one example of the present invention, the sampling body 120 has a mounting cavity 122 coaxially arranged with the drive rod 141, and the elastic member 143 is installed in the mounting cavity 122 and sleeved on the drive rod 141; wherein, one end of the elastic member 143 is fixed relative to the mounting cavity 122, and the other end of the elastic member 143 is fixed relative to the drive rod 141; for example, the elastic member 143 is a compression spring, which can be limited by a protrusion 144 provided on the outer wall of the drive rod 141. When the elastic member 143 is compressed, one end of the elastic member abuts against the mounting cavity 122, and the other end abuts against the protrusion 144. The distance between the protrusion 144 and the mounting cavity 122 is reduced by the drive member 141, thereby compressing the elastic member 143.

[0037] For example, the elastic element 143 is a compression spring; the telescopic scraper 142 is installed at the upper end near the sampling chamber 121; When using the sampling device 100, firstly, drive the control lever 130 so that the sampling body 120 and the drill bit 110 are inserted into the wetland soil to a specified depth; then drive at least one telescopic scraper 142 so that the scraper 14212 extends out of the cylinder 14211 from the first position to the second position, realizing that the scraper 14212 extends into the wetland soil from the sampling chamber 121. Then, continue to drive the drive rod 141 to move upward along the extension direction of the drive rod 141 so that it moves from the second position to the third position. At this time, the drive rod 141 will squeeze the sample in the mounting chamber 1. The compression spring inside 22 generates an elastic force to restore it to its initial position; then, the wet soil outside the sampling chamber 121 is scraped into the sampling chamber 121; then, the control lever 130 is driven to remove the wet soil from the sampling body 120. First, the drive lever 141 moves downward along the extension direction of the drive lever 141 under the action of the elastic force of the compression spring, so that the telescopic scraper 142 switches from the third position to the second position. Then, the scraper 14212 of the telescopic scraper 142 retracts from the extended position to the retracted position, that is, the second position switches to the first position. Finally, the wet soil in the sampling chamber 121 is removed.

[0038] For example, the elastic element 143 is a tension spring; the telescopic scraper 14212 is installed at the lower end near the sampling chamber 121; When using the sampling device 100, firstly, drive the control lever 130 so that the sampling body 120 and the drill bit 110 are inserted into the wetland soil to a specified depth; then drive at least one telescopic scraper 142 so that the scraper 14212 extends out of the cylinder 14211 from the first position to the second position, realizing that the scraper 14212 extends into the wetland soil from the sampling chamber 121. Then, continue to drive the drive rod 141 downward along the extension direction of the drive rod 141 so that it moves from the second position to the third position. At this time, the drive rod 141 will stretch the mounting cavity 1. The tension spring inside 22 generates an elastic force to restore it to its initial position; then, the wet soil outside the sampling chamber 121 is scraped into the sampling chamber 121; then, the control lever 130 is driven to remove the wet soil from the sampling body 120. First, the drive lever 141 moves upward along the extension direction of the drive lever 141 under the action of the elastic force of the tension spring, so that the telescopic scraper 142 switches from the third position to the second position. Then, the scraper 14212 of the telescopic scraper 142 retracts from the extended position to the retracted position, that is, the second position switches to the first position. Finally, the wet soil in the sampling chamber 121 is removed.

[0039] In one example of the present invention, such as Figures 2 to 5 As shown, the telescopic scraper 142 is installed at the upper end near the sampling chamber 121, and the telescopic scraper 142 is driven to switch from the second position to the third position by the upward movement of the drive rod 141; or like Figures 6 to 8 As shown, the telescopic scraper 142 is installed at the lower end near the sampling chamber 121, and the telescopic scraper 142 is driven to switch from the second position to the third position by the downward movement of the drive rod 141; In other words, the telescopic scraper 142 can be installed at the upper end or the lower end of the sampling chamber 121. Although the installation positions of the telescopic scraper 142 are different, both positions are designed to allow the scraper 14212 in the extended state to move from the outside of the sampling chamber 121 to the inside of the sampling chamber 121, thereby facilitating the scraping of external wetland soil into the sampling chamber 121. However, since the two positions are relative, when switching the telescopic scraper 142 from the second position to the third position, it is necessary to drive the drive rod 141 to move in two opposite directions. That is, when the telescopic scraper 142 is installed at the upper end of the sampling chamber 121, the drive rod 141 needs to be pulled upward; when the telescopic scraper 142 is installed at the lower end of the sampling chamber 121, the drive rod 142 needs to be pressed downward. Both of the above embodiments can realize the scraping function of the telescopic scraper 142.

[0040] In one example of the present invention, such as Figure 9 , Figure 10 and Figure 11 As shown, the telescopic scraper 142 includes at least two, and is symmetrically installed at the upper and lower ends of the sampling chamber 121, respectively; for example, as Figure 9 and Figure 10 As shown, the telescopic scraper 142 includes four blades, with two blades at the top and two blades at the bottom.

[0041] The drive rod 141 includes a first rod portion 1411 and a second rod portion 1412 detachably connected thereto. The telescopic scraper 142 installed at the upper end of the sampling chamber 121 is connected to the first rod portion 1411, and the telescopic scraper 142 installed at the lower end of the sampling chamber 121 is connected to the second rod portion 1412. Specifically, during the sampling process, firstly, the control lever 130 is driven so that the sampling body 120 and the drill bit 110 are inserted together into the wetland soil to a specified depth; then, the telescopic scraper 142 located at the lower end of the mounting cavity 122 is driven so that the scraper 14212 extends relative to the cylinder 14211 to complete the switching from the first position to the second position, so that the scraper 14212 extends into the wetland soil outside the sampling cavity 121. The drive lever 141 is then driven downwards so that the telescopic scraper 142 located at the lower end of the mounting cavity 122 switches from the second position to the third position, thus taking the sample... Wetland soil outside the sampling chamber 121 is scraped into the sampling chamber 121, and the position of the drive rod 141 is maintained (e.g., pressed and held); then the first rod portion 1411 and the second rod portion 1412 of the drive rod 141 are separated and the external force applied to the drive rod 141 is released, wherein the first rod portion 1411 returns to its initial position under the elastic force of the elastic member 143, and continues to drive the telescopic scraper 142 located at the upper end of the mounting cavity 122 so that the scraper 14212 extends relative to the cylinder 14211 to complete the switching from the first position to the second position, so that the scraper 1 4212 extends into the wetland soil outside the sampling chamber 121, driving the drive rod 141 to move upward, causing the telescopic scraper 142 located at the upper end of the mounting cavity 122 to switch from the second position to the third position, scraping the wetland soil outside the sampling chamber 121 into the sampling chamber 121; driving the control rod 130 to remove the sampling body 120 from the wetland soil, the telescopic scraper 142 located at the upper end of the mounting cavity 122 returns from the third position to the second position under the action of the elastic member 143, and then drives the telescopic scraper 142 so that the scraper 14212 is relative to the cylinder 14211. The device retracts to switch from the second position to the first position; it drives the drive rod 141 downward, connecting the first rod 1411 to the second rod 1412. Then, under the action of the elastic element 143, it drives the drive rod 141 upward, switching the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the third position to the second position. The telescopic scraper 142 located at the lower end of the mounting cavity 122 retracts relative to the cylinder 14211 to complete the switch from the second position to the first position. Finally, the wetland soil in the sampling cavity 121 is removed. The above-described sampling device 100 can sample soil at a specified depth in wetland soil, avoiding sampling unnecessary soil layers on the surface, improving sampling accuracy. Furthermore, the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0042] It should be noted that when there are four telescopic scrapers 142, i.e., two at the top and two at the bottom, the drive rod 141 needs to move downward (driving the telescopic scraper 142 at the bottom) and upward (driving the telescopic scraper 142 at the top). To facilitate the timely reset of the drive rod 141, two compression springs can be provided in the mounting cavity 122. Specifically, a protrusion 144 is provided on the drive rod 141 near the middle of the mounting cavity 122, and compression springs are respectively fitted at the upper and lower ends of the protrusion 144. When the drive rod 141 drives the telescopic scraper 142 located at the lower end of the sampling cavity 121 from the second position to the third position, the drive rod 141 will compress the protrusion 144. The compression spring at the lower end of the protrusion 144; when the drive rod 141 drives the telescopic scraper 142 located at the upper end of the sampling cavity 121 to move from the second position to the third position, the drive rod will compress the compression spring at the upper end of the protrusion 144; wherein, one end of the compression spring located at the upper end of the protrusion abuts against the protrusion 144, and the other end abuts against the upper end surface of the mounting cavity 122, so as to avoid stretching the compression spring at the lower end of the protrusion 144 during the upward movement of the drive rod 141; one end of the compression spring located at the lower end of the protrusion abuts against the protrusion 144, and the other end abuts against the lower end surface of the mounting cavity 122, so as to avoid stretching the compression spring at the upper end of the protrusion 144 during the downward movement of the drive rod 141.

[0043] It is understandable that, such as Figure 10 As shown, the telescopic scraper 142 located at the lower end of the sampling chamber 121 is driven by the drive rod 141 to move to the third position. At this time, the telescopic scraper 142 located at the upper end of the sampling chamber 121 will rotate in the direction of movement close to the upper end of the sampling chamber 121, with the pivotal connection between the cylinder 14211 and the sampling chamber 121 as the center. This causes the telescopic scraper 142 at the upper end of the sampling chamber 121 to open outward. Sufficient space is left between the telescopic scraper 142 and the sampling chamber 121 to prevent interference between the telescopic scraper 142 and the sampling chamber 121 during movement.

[0044] In one example of the present invention, the first rod portion 1411 and the second rod portion 1412 are connected by a first electromagnet assembly 180; wherein, the first electromagnet assembly 180 includes a first magnetic sheet 181 fixedly connected to the first rod portion 1411 and a second magnetic sheet 182 fixedly connected to the second rod portion 1412; when the first electromagnet assembly 180 is energized, the first magnetic sheet 181 and the second magnetic sheet 182 attract each other; when the first electromagnet assembly 180 is de-energized, the first magnetic sheet 181 and the second magnetic sheet 182 separate. For example, after the first magnetic piece 181 and the second magnetic piece 182 are energized, one of them becomes a positive magnetic pole and the other becomes a negative magnetic pole, thereby causing the first rod portion 1411 and the second rod portion 1412 to attract each other; and after the first magnetic piece 181 and the second magnetic piece 182 are de-energized, the two separate from each other.

[0045] During the sampling process, firstly, the control lever 130 is driven to insert the sampling body 120 and the drill bit 110 together into the wetland soil at a specified depth; then, the telescopic scraper 142 located at the lower end of the mounting cavity 122 is driven to extend relative to the cylinder 14211, completing the switch from the first position to the second position, so that the scraper 14212 extends into the wetland soil outside the sampling cavity 121. The drive lever 141 is then driven downward to switch the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the second position to the third position, thus opening the sampling cavity. The wet soil outside the sampling chamber 121 is scraped into the sampling chamber 121, and the position of the drive rod 141 is maintained. Then, the first electromagnet assembly 180 is de-energized, causing the first rod 1411 to separate from the second rod 1412. The first rod 1411 returns to its initial position under the elastic force of the elastic member 143. The telescopic scraper 142 located at the upper end of the mounting cavity 122 is driven to extend relative to the cylinder 14211, completing the switch from the first position to the second position. This allows the scraper 14212 to extend into the wet soil outside the sampling chamber 121. In the soil, the drive rod 141 moves upward, causing the telescopic scraper 142 located at the upper end of the mounting cavity 122 to switch from the second position to the third position, scraping the wet soil outside the sampling cavity 121 into the sampling cavity 121; the drive lever 130 removes the sample body 120 from the wet soil, and the telescopic scraper 142 located at the upper end of the mounting cavity 122 returns from the third position to the second position under the action of the elastic member 143. Then, the telescopic scraper 142 is driven to retract relative to the cylinder 14211 to complete the transition from the second position to the first position. The process involves switching the drive rod 141 downwards, energizing the first electromagnet assembly 180, connecting the first rod 1411 to the second rod 1412, and then, under the action of the elastic element 143, driving the drive rod 141 upwards to switch the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the third position to the second position. This drives the telescopic scraper 142 located at the lower end of the mounting cavity 122 to retract relative to the cylinder 14211, completing the switch from the second position to the first position. Finally, the wetland soil in the sampling cavity 121 is removed. This sampling device 100 allows for sampling of soil at a specified depth in wetlands, avoiding sampling of unnecessary surface soil layers, improving sampling accuracy. Furthermore, the sampling device 100 is simple to operate, convenient for sampling, and highly reliable.

[0046] It is understandable that since the first electromagnet component 180 will become magnetic after being energized, in order to prevent the first electromagnet component 180 from magnetizing other components and affecting the normal use of the entire soil sampling device 100, the component connected to the first electromagnet component 180 (including direct or indirect contact) is selected, for example, the drive rod 141, which can be other non-magnetic or difficult-to-magnetize metals, such as copper.

[0047] In one embodiment of the present invention, a second electromagnet assembly 190 is further included, comprising a third magnetic sheet 191 and a fourth magnetic sheet 192. The third magnetic sheet 191 is fixed to the second rod portion 1412, and the fourth magnetic sheet 192 is fixed to the sampling chamber 121. The assembly is disposed between the sampling chamber 121 and the second rod portion 1412. When the second electromagnet assembly 190 is energized, the third magnetic sheet 191 and the fourth magnetic sheet 192 attract each other. When the second electromagnet assembly 190 is de-energized, the third magnetic sheet 191 and the fourth magnetic sheet 192 separate. For example, after the third magnetic sheet 191 and the fourth magnetic sheet 192 are energized, one of them becomes a positive magnetic pole and the other becomes a negative magnetic pole, thereby causing the sampling cavity 121 and the second rod portion 1412 to attract each other; and after the third magnetic sheet 191 and the fourth magnetic sheet 192 are de-energized, the two separate from each other.

[0048] During the sampling process, firstly, the control lever 130 is driven to insert the sampling body 120 and the drill bit 110 together into the wetland soil at a specified depth; then, the telescopic scraper 142 located at the lower end of the mounting cavity 122 is driven to extend relative to the cylinder 14211, completing the switch from the first position to the second position, so that the scraper 14212 extends into the wetland soil outside the sampling cavity 121. The drive lever 141 is then driven to move downward, causing the telescopic scraper 142 located at the lower end of the mounting cavity 122 to switch from the second position to the third position, scraping the wetland soil outside the sampling cavity 121 into the sampling cavity 121; then, the first electric... When the magnet assembly 180 is de-energized, the first rod 1411 and the second rod 1412 separate. Simultaneously, the second electromagnet assembly 190 is energized, fixing the second rod 1412 onto the sampling chamber 121. This fixes the position of the second rod 1412, maintaining it in the third position of the telescopic scraper 142 at the lower end of the sampling chamber 121. Meanwhile, the first rod 1411 returns to its initial position under the elastic force of the elastic member 143. Continuing to drive the telescopic scraper 142 at the upper end of the mounting cavity 122 causes the scraper 14212 to extend relative to the cylinder 14211, completing the switch from the first position to the second position. The scraper 14212 extends into the wet soil outside the sampling chamber 121. Driving the drive rod 141 upwards causes the telescopic scraper 142 at the upper end of the mounting cavity 122 to switch from the second position to the third position, scraping the wet soil outside the sampling chamber 121 into the sampling chamber 121. Driving the control lever 130 removes the sample body 120 from the wet soil. The telescopic scraper 142 at the upper end of the mounting cavity 122 returns to the second position from the third position under the action of the elastic element 143. Then, driving the telescopic scraper 142 causes it to retract relative to the cylinder 14211, completing the switch from the second position to the first position. The drive rod 141 moves downward, energizing the first electromagnet assembly 180 and de-energizing the second electromagnet assembly 190. This connects the first rod portion 1411 with the second rod portion 1412, separating the second rod portion 1412 from the sampling chamber 121. Then, under the action of the elastic element 143, the drive rod 141 moves upward, causing the telescopic scraper 142 located at the lower end of the mounting cavity 122 to switch from the third position to the second position. This drives the telescopic scraper 142 located at the lower end of the mounting cavity 122 to retract relative to the cylinder 14211, completing the switch from the second position to the first position. Finally, the wetland soil in the sampling chamber 121 is removed. The above-described sampling device 100 can sample soil at a specified depth in wetland soil, avoiding sampling unnecessary surface soil layers, improving sampling accuracy. Furthermore, the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0049] It is also understandable that, since the second electromagnet assembly 190 becomes magnetic after being energized, in order to prevent the second electromagnet assembly 190 from magnetizing other components and affecting the normal use of the entire soil sampling device 100, a component that is connected to (including direct or indirect contact with) the second electromagnet assembly 190 is selected, such as a copper part.

[0050] In one example of the invention, a monitoring sensor 150 is also included. The sampling device 100 is installed within the sampling chamber 121 and configured to monitor the wetland soil scraped into the chamber. For example, the monitoring sensor 150 can be a humidity sensor, a temperature sensor, a soil depth sensor, etc. The humidity sensor senses soil moisture information, the temperature sensor senses soil temperature information, and the soil depth sensor senses soil depth information, thus facilitating the collection of moist soil at a specified depth. The monitoring sensor 150 provides soil texture information for analysis. In other words, the monitoring sensor 150 is coupled to the controller 160. By placing the monitoring sensor 150 within the sampling chamber 121, the sampling device 100 can monitor the soil while sampling and transmit the monitoring data to the controller 160, thereby facilitating preliminary analysis of the wetland soil. It should be noted that the installation location of the monitoring sensor 150 is selected and installed appropriately based on its specific function; the location shown in the figure is exemplary.

[0051] In one example of the present invention, such as Figure 12 As shown, it also includes: a controller 160, for example, the controller 160 is mounted in the control handle 131; It is coupled to the scraping mechanism 140 and configured to control the scraping mechanism 140 to switch between a first position where it is received in the sampling chamber 121, a second position where it extends out of the sampling chamber 121, and a third position where it scrapes external soil into the sampling chamber 121; that is, the controller 160 is coupled to the telescopic scraper 142 and configured to control the scraper 14212 to switch between a first position where it is retracted into the cylinder 14211 and a second position where it extends out of the cylinder 14211. It is coupled to the first electromagnet assembly 180 and configured to control the adsorption and separation of the first magnetic sheet 181 and the second magnetic sheet 182 so that the first rod portion 1411 and the second rod portion 1412 are connected or separated. It is coupled to the second electromagnet assembly 190 and configured to control the adsorption and separation of the third magnetic sheet 191 and the fourth magnetic sheet 192 so that the sampling chamber 121 and the second rod portion 1412 are connected or separated. The control process of controller 160 is as follows: First, drive the lever 130 so that the sampling body 120 and the drill bit 110 are inserted into the wet soil to a specified depth; then, the controller controls the telescopic scraper 142 located at the lower end of the mounting cavity 122 to extend relative to the cylinder 14211, completing the switch from the first position to the second position, so that the scraper 14212 extends into the wet soil outside the sampling cavity 121. Manually drive the drive lever 141 downward to switch the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the second position to the third position, scraping the wet soil outside the sampling cavity 121 into the sampling cavity 121; then... The controller de-energizes the first electromagnet assembly 180, separating the first rod 1411 and the second rod 1412. Simultaneously, the controller energizes the second electromagnet assembly 190, fixing the second rod 1412 onto the sampling chamber 121, thereby fixing the position of the second rod 1412 to maintain the third position of the scraper 14212 in the telescopic scraper 142 located at the lower end of the sampling chamber 121. The first rod 1411 returns to its initial position under the elastic force of the elastic member 143. The controller drives the telescopic scraper 142 located at the upper end of the mounting cavity 122, causing the scraper 14212 to extend relative to the cylinder 14211, completing the transition from the first position to the second position. The switching mechanism allows the scraper 14212 to extend into the wet soil outside the sampling chamber 121. Manually driving the drive lever 141 upwards switches the telescopic scraper 142 located at the upper end of the mounting cavity 122 from the second position to the third position, scraping the wet soil outside the sampling chamber 121 into the sampling chamber 121. Driving the control lever 130 removes the sample body 120 from the wet soil. Under the action of the elastic element 143, the telescopic scraper 142 located at the upper end of the mounting cavity 122 returns from the third position to the second position. Then, the controller controls the telescopic scraper 142 to retract relative to the cylinder 14211, completing the switch from the second position to the first position. Manually... The drive rod 141 moves downward and the controller controls the first electromagnet assembly 180 to be energized and the second electromagnet assembly 190 to be de-energized, so that the first rod 1411 and the second rod 1412 are connected and the second rod 1412 is separated from the sampling chamber 121. Then, under the action of the elastic member 143, the drive rod 141 moves upward, so that the telescopic scraper 142 located at the lower end of the mounting chamber 122 switches from the third position to the second position. The controller controls the telescopic scraper 142 located at the lower end of the mounting chamber 122 to retract relative to the cylinder 14211 to complete the switch from the second position to the first position. Finally, the wet soil in the sampling chamber 121 is taken out.

[0052] It is understood that the controller 160 also includes an operation display screen (not shown in the figure). For example, the operation display screen is mounted on the control handle 131 and displays the relevant controls of the sampling device 100 through the operation display screen. For example, the operation display screen controls the opening and closing of the first electromagnet assembly 180 and the second electromagnet assembly 190; or, for example, the operation display screen controls the extension and retraction commands of the telescopic scraper.

[0053] According to a second aspect of the present invention, a sampling method of the wetland soil sampling apparatus 100 described in any one of the above claims, such as... Figure 13 As shown, it includes the following steps: S10: Drive the control lever 130 so that the sample body 120 and the drill bit 110 are inserted into the wetland soil to a specified depth; S20: Drive the scraping mechanism 140 to move from the first position to the second position, so that the scraping mechanism 140 extends from the sampling chamber 121 into the wetland soil, and then continue to drive the scraping mechanism 140 to move from the second position to the third position, so as to scrape the wetland soil outside the sampling chamber 121 into the sampling chamber 121. S30: Drive the control lever 130 to remove the wetland soil from the sampling body 120, and drive the scraping mechanism 140 to switch from the third position to the second position in sequence, and then switch from the second position to the first position, and finally remove the wetland soil from the sampling chamber 121. The above sampling method can sample soil at a specified depth in wetland soil, avoiding sampling of unnecessary soil layers on the surface, thus improving the accuracy of sampling. Moreover, the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0054] According to a third aspect of the present invention, a sampling method for a wetland soil sampling apparatus 100 as described above is provided. Figure 14 As shown, it includes the following steps: S110: Drive the control lever 130 so that the sample body 120 and the drill bit 110 are inserted into the wetland soil to a specified depth; S120: Drive the telescopic scraper 142 located at the lower end of the mounting cavity 122 to extend the scraper 14212 relative to the cylinder 14211 to complete the switching from the first position to the second position, so that the scraper 14212 extends into the wet soil outside the sampling cavity 121, and drive the drive rod 141 to move downward to switch the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the second position to the third position, scraping the wet soil outside the sampling cavity 121 into the sampling cavity 121; S130: Separate the first rod portion 1411 and the second rod portion 1412 of the drive rod 141, wherein the first rod portion 1411 returns to its initial position under the elastic force of the elastic member 143, and the second rod portion 1412 keeps the telescopic scraper 142 in the third position. S140: Drive the telescopic scraper 142 located at the upper end of the mounting cavity 122 to extend the scraper 14212 relative to the cylinder 14211 to complete the switching from the first position to the second position, so that the scraper 14212 extends into the wet soil outside the sampling cavity 121, and drive the drive rod 141 to move upward so that the telescopic scraper 142 located at the upper end of the mounting cavity 122 switches from the second position to the third position, scraping the wet soil outside the sampling cavity 121 into the sampling cavity 121; S150: Drive the control lever 130 to remove the wetland soil from the sample body 120. The telescopic scraper 142 located at the upper end of the mounting cavity 122 returns to the second position from the third position under the action of the elastic member 143. Then drive the telescopic scraper 142 to make its scraper 14212 retract relative to the cylinder 14211 to complete the switch from the second position to the first position. S160: Drive the drive rod 141 downward to connect the first rod 1411 with the second rod 1412. Continue to drive the drive rod 141 upward to switch the telescopic scraper 142 located at the lower end of the mounting cavity 122 from the third position to the second position. Drive the telescopic scraper 142 located at the lower end of the mounting cavity 122 to make the scraper 14212 retract relative to the cylinder 14211 to complete the switch from the second position to the first position. Finally, take out the wet soil in the sampling cavity 121.

[0055] The above sampling method enables at least two telescopic scrapers 142 to scrape, allowing both the telescopic scrapers 142 located on the upper and lower sides of the sampling chamber 121 to scrape wetland soil from outside the sampling chamber 121, greatly accelerating the sampling efficiency. This sampling method uses a drill bit 110 to drill the soil and sample the soil at a specified depth in the wetland soil, avoiding sampling unnecessary soil layers on the surface and improving the accuracy of the sampling. Moreover, the sampling device 100 is simple to operate, convenient to sample, and highly reliable.

[0056] The foregoing has described in detail, with reference to preferred embodiments, exemplary implementations of the wetland soil sampling device 100 and its sampling method proposed in this invention. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this invention, and various combinations can be made to the various technical features and structures proposed in this invention without exceeding the protection scope of this invention, which is determined by the appended claims.

Claims

1. A wetland soil sampling device, characterized in that, include: Drill bit (110); The sampling body (120) is connected to the drill bit (110) and has a sampling cavity (121) that communicates with the outside. A joystick (130), connected to the sampling body (120), is configured to apply an external force to the drill bit (110) to insert or remove wetland soil; The scraping mechanism (140), adapted in the sampling body (120), is configured to move between a first position received in the sampling cavity (121), a second position extending out of the sampling cavity (121), and a third position scraping external soil into the sampling cavity (121).

2. The wetland soil sampling device according to claim 1, characterized in that, The scraping mechanism (140) includes: A drive rod (141) is sequentially inserted through the control rod (130) and the sampling body (120) along the extension direction of the control rod (130); At least one telescopic scraper (142) has a cylinder (14211) and a scraper (14212) that can extend and retract within the cylinder (14211). The cylinder (14211) has a first connection point (142A) and a second connection point (142B). The first connection point (142A) is hinged to the drive rod (141), and the second connection point (142B) is hinged to the sampling body (120). This allows the telescopic scraper (142) to rotate around the hinge point (142B) as the center under the drive of the drive rod (141), thus switching between a first position and a second or third position.

3. The wetland soil sampling device according to claim 2, characterized in that, The scraping mechanism (140) further includes: An elastic element (143) is connected between the sampling body (120) and the drive rod (141) and is configured such that when the telescopic scraper (142) moves from a first position or a second position to a third position, the telescopic scraper (142) generates a tendency force to return to the first position or the second position.

4. The wetland soil sampling device according to claim 3, characterized in that, The elastic element (143) is one of a compression spring, a tension spring, and a spring sheet.

5. The wetland soil sampling device according to claim 3, characterized in that, The sampling body (120) has an installation cavity (122) coaxially arranged with the drive rod (141). The elastic element (143) is installed in the installation cavity (122) and sleeved on the drive rod (141). One end of the elastic element (143) is fixed relative to the installation cavity (122), and the other end of the elastic element (143) is fixed relative to the drive rod (141).

6. The wetland soil sampling device according to claim 2, characterized in that, The telescopic scraper (142) is installed at the upper end near the sampling chamber (121), and the telescopic scraper (142) is driven to switch from the second position to the third position by the upward movement of the drive rod (141); or The telescopic scraper (142) is installed at the lower end near the sampling chamber (121), and the telescopic scraper (142) is driven to switch from the second position to the third position by the downward movement of the drive rod (141).

7. The wetland soil sampling device according to claim 2, characterized in that, The telescopic scraper (142) includes at least two, and is symmetrically installed at the upper and lower ends of the sampling chamber (121); The drive rod (141) includes a first rod portion (1411) and a second rod portion (1412) detachably connected thereto. A telescopic scraper (142) installed at the upper end of the sampling chamber (121) is connected to the first rod portion (1411), and a telescopic scraper (142) installed at the lower end of the sampling chamber (121) is connected to the second rod portion (1412).

8. The wetland soil sampling device according to claim 7, characterized in that, The first rod portion (1411) and the second rod portion (1412) are connected by a first electromagnet assembly (180); wherein, the first electromagnet assembly (180) includes a first magnetic sheet (181) fixedly connected to the first rod portion (1411) and a second magnetic sheet (182) fixedly connected to the second rod portion (1412). When the first electromagnet assembly (180) is energized, the first magnetic sheet (181) and the second magnetic sheet (182) attract each other; when the first electromagnet assembly (180) is de-energized, the first magnetic sheet (181) and the second magnetic sheet (182) separate.

9. A sampling method for a wetland soil sampling device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S10: Drive the joystick (130) to insert the sample body (120) and the drill bit (110) together into the wetland soil to a specified depth; S20: Drive the scraping mechanism (140) to move from the first position to the second position, so that the scraping mechanism (140) extends into the wetland soil from the sampling chamber (121), and then continue to drive the scraping mechanism (140) to move from the second position to the third position, so as to scrape the wetland soil outside the sampling chamber (121) into the sampling chamber (121); S30: Drive the control lever (130) to remove the wetland soil from the sampling body (120), and drive the scraping mechanism (140) to switch from the third position to the second position in sequence, and then switch from the second position to the first position, and finally remove the wetland soil from the sampling chamber (121).

10. A sampling method for a wetland soil sampling device as described in claim 7, characterized in that, Includes the following steps: S110: Drive the joystick (130) to insert the sample body (120) and the drill bit (110) together into the wetland soil to a specified depth; S120: Drive the telescopic scraper (142) located at the lower end of the mounting cavity (122) to make the scraper (14212) extend relative to the cylinder (14211) to complete the switching from the first position to the second position, so that the scraper (14212) extends into the wet soil outside the sampling cavity (121), drive the drive rod (141) to move downward to make the telescopic scraper (142) located at the lower end of the mounting cavity (122) switch from the second position to the third position, and scrape the wet soil outside the sampling cavity (121) into the sampling cavity (121); S130: Separate the first rod part (1411) and the second rod part (1412) of the drive rod (141), wherein the first rod part (1411) returns to the initial position under the elastic force of the elastic member (143), and the second rod part (1412) keeps the telescopic scraper (142) in the third position. S140: Drive the telescopic scraper (142) located at the upper end of the mounting cavity (122) to make the scraper (14212) extend relative to the cylinder (14211) to complete the switching from the first position to the second position, so that the scraper (14212) extends into the wet soil outside the sampling cavity (121), and drive the drive rod (141) to move upward so that the telescopic scraper (142) located at the upper end of the mounting cavity (122) switches from the second position to the third position, scraping the wet soil outside the sampling cavity (121) into the sampling cavity (121); S150: Drive the control lever (130) to remove the wetland soil from the sample body (120). The telescopic scraper (142) located at the upper end of the mounting cavity (122) returns from the third position to the second position under the action of the elastic element (143). Then drive the telescopic scraper (142) to make its scraper (14212) retract relative to the cylinder (14211) to complete the switch from the second position to the first position. S160: Drive the drive rod (141) downward to connect the first rod (1411) with the second rod (1412), continue to drive the drive rod (141) upward to switch the telescopic scraper (142) located at the lower end of the mounting cavity (122) from the third position to the second position, drive the telescopic scraper (142) located at the lower end of the mounting cavity (122) to make its scraper (14212) retract relative to the cylinder (14211) to complete the switch from the second position to the first position; finally, take out the wet soil in the sampling cavity (121).

Images