An automated whole-section sampling device for saline-alkali soil detection

Abstract

The present invention relates to the technical field of soil sampling equipment, and specifically discloses an automated whole-section sampling device for saline-alkali soil detection, including a mounting frame, the inner surface of the mounting frame is fixedly connected with a stabilizing rod, and the stabilizing rod is symmetrically fixedly connected to both sides of the mounting frame. The present invention can automatically complete the whole-section sampling of soil by starting the motor, which greatly improves the convenience of use, and the set preparation ring can not only protect the cutter head and prevent the cutter head from being damaged by collision, but also provide time for the folding of the sampling plate, ensuring that the sampling plate is completely folded when sampling the soil, and when the motor is reversed, the sampling plate moves up in the reverse spiral, and expands outward during the upward movement to release the soil, that is, the soil is released at the same time after the device is reset, which further improves the convenience of operation, and also greatly improves the protection effect of the sampled soil to prevent the soil from scattering.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling equipment, in particular to an automatic whole-section sampling device for detecting saline-alkali soil. Background Art

[0002] Saline-alkali soil is a general term for saline soil and alkaline soil. Saline soil (solonchak) and alkaline soil (solonetz) refer to soils that contain soluble salts and have a high salt concentration, which directly inhibits or harms plant growth.

[0003] In the field of saline-alkali soil detection, traditional soil sampling methods often rely on manual operations. These methods are not only inefficient, but also easily disturb or damage the soil samples during the sampling process, affecting the accuracy of the test results. In addition, manual sampling makes it difficult to achieve complete collection of the deep soil structure, resulting in insufficient sample representativeness. In order to improve the efficiency and accuracy of saline-alkali soil detection, it is necessary to develop an automated whole-section sampling device to achieve rapid and accurate collection of soil samples.

[0004] Most of the existing soil sampling equipment has the problems of complex operation and high cost, and it is difficult to avoid damaging the soil structure during the sampling process, especially in the special environment of saline-alkali soil, where the physical and chemical properties of the soil put forward higher requirements for sampling equipment. Therefore, the development of a device that can adapt to the characteristics of saline-alkali soil and achieve automated, efficient and low-cost sampling has become a technical problem that needs to be solved in this field. Summary of the invention

[0005] The present invention provides an automated whole-section sampling device for saline-alkali soil detection, which solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automated whole-section sampling device for saline-alkali soil detection, comprising a mounting frame, a stabilizing rod fixedly connected to the inner surface of the mounting frame, and the stabilizing rod symmetrically fixedly connected to both sides of the mounting frame, and further comprising:

[0007] A sampling mechanism, the sampling mechanism is fixedly connected to the mounting frame, and the sampling mechanism is used to sample the soil;

[0008] An auxiliary mechanism, the auxiliary mechanism is fixedly mounted on the sampling mechanism, and the auxiliary mechanism is used to peel off the soil obtained by the sampling mechanism;

[0009] The sampling mechanism comprises a top plate, which is fixedly connected to the top outer surface of the mounting frame, and the top plate is horizontally arranged. The outer surfaces at both ends of the top plate are symmetrically fixedly connected to support rods, the bottom inner surface of the support rod is fixedly connected to a limiting ring, the outer surface of the limiting ring is fixedly connected to the bottom outer surface of the mounting frame, the top inner surface of the support rod is fixedly connected to a fixing plate, the fixing plate is fixedly connected to a motor at one end away from the support rod, the output end of the motor is rotatably connected to a rotating shaft, and the end of the rotating shaft away from the motor passes through and is rotatably connected to the upper surface of the top plate.

[0010] One end of the rotating shaft away from the motor is fixedly connected to a mounting plate, the mounting plate is set in a disc shape, a first slide groove is opened on the lower surface of the mounting plate, four first slide grooves are set at fixed intervals around the central axis of the mounting plate, and the first slide groove is set in a straight line.

[0011] As a further preferred embodiment of the present invention, a sampling plate is provided on the lower surface of the mounting plate. The sampling plate is arranged in an arc shape. Four sampling plates are arranged at fixed intervals around the central axis of the mounting plate. The sampling plates are not in contact with each other initially. Storage grooves are symmetrically provided on both sides of the sampling plate. A connecting plate is slidably connected in the storage groove.

[0012] As a further preferred embodiment of the present invention, the connecting plate is arranged to be arc-shaped, the connecting plate and the sampling plate are combined into a tubular shape, the inner surfaces of the connecting plate and the sampling plate are arranged to be the same arc-shaped surface, a second slide groove is provided on the inner surface of the sampling plate, a connecting strip is slidably connected up and down in the second slide groove, and the top of the connecting strip is slidably connected in the first slide groove.

[0013] As a further preferred embodiment of the present invention, the bottom inner surface of the connecting strip is arranged to be inclined, the inner surfaces on both sides of the connecting plate are also arranged to be inclined surfaces, and a plug-in groove is provided on the bottom surface of the sampling plate, a cutter head is fixedly inserted in the plug-in groove, and the cutter head is arranged to be arc-shaped.

[0014] As a further preferred embodiment of the present invention, a third slide groove is provided on the lower surface of the limit ring, and the third slide groove is arranged in a ring shape. The inner part of the third slide groove is rotatably connected with a rotating ring, and a damping is arranged between the rotating ring and the limit ring. The lower surface of the rotating ring is fixedly connected with a limit strip, and four limit strips are arranged at fixed intervals around the central axis of the rotating ring, and the limit strips are arranged in an inclined shape.

[0015] As a further preferred embodiment of the present invention, a slider is slidably connected to the bottom of the limit bar, a fourth slide groove is provided on the outer surface of the sampling plate, the fourth slide groove is linearly arranged, one end of the slider away from the limit bar is slidably connected in the fourth slide groove, sealing grooves are provided on the outer surfaces of both sides of the connecting plate, and sliding bars are slidably connected inside the sealing grooves, and the sliding bars are fixedly connected to the inner surfaces of both sides of the sampling plate. The sampling device can be moved to the required working location by holding the mounting frame, and the motor can be started when the device is used to sample the soil, and when the motor is started, the rotating shaft will start to rotate, and when the rotating shaft starts to rotate, it will drive the mounting plate at the bottom to rotate, that is, the rotation of the mounting plate drives the bottom fourth slide groove to rotate. The connecting strip in one slide groove rotates, and the connecting strip is slidably inserted into the second slide groove on the sampling plate, that is, after the motor is started, it will eventually drive the sampling plate to rotate, that is, the rotation of the sampling plate causes the knife head at the bottom of the sampling plate to cut and sample the soil, and when the sampling plate rotates, it will also drive the slider on its outer surface to rotate, and the end of the slider away from the sampling plate is slidably connected to the limit strip, that is, when the sampling plate rotates, the slider will slide along the limit strip, and by setting the limit strip obliquely, the sampling plate can be contracted inwardly when driven by the motor, and the sampling tube is finally folded into a complete tube through the connection of the connecting plate. At this time, with the continuous rotation of the motor, the sampling plate cannot continue to contract, and it will drive the rotating ring to rotate in the third slide groove.

[0016] As a further preferred embodiment of the present invention, the auxiliary mechanism includes a sleeve, the bottom of the sleeve is fixedly connected to the upper surface of the limiting ring, the top inner surface of the sleeve is rotatably connected to the side surface of the mounting plate, and the inner surface of the sleeve is provided with a threaded groove.

[0017] As a further preferred embodiment of the present invention, a driving strip is slidably connected in the threaded groove, a telescopic rod is fixedly connected to the inner surface of the driving strip, one end of the telescopic rod away from the driving strip is fixedly connected to the top outer surface of the sampling plate, a preparation ring is fixedly connected to the bottom of the support rod, a protruding cutter head is arranged on the bottom of the preparation ring, and after the handheld mounting frame moves the device to a specified position, the preparation ring can be placed on the ground where soil needs to be collected, and as the motor starts to drive the sampling plate to rotate, the telescopic rod on the top surface of the sampling plate will also be driven to rotate, so that the end of the telescopic rod is The driving bar at the top rotates, and the driving bar is slidably connected in the thread groove. When the driving bar is driven to rotate by the telescopic rod, the rotating bar will also move downward along the thread groove, thereby driving the sampling plate to move downward, that is, the sampling plate will move downward at the same time when it is driven to rotate by the motor. At this time, the cutter head gradually moves down close to the ground. When the cutter head touches the ground, the sampling plate is completely retracted, that is, with the continuous driving of the motor, the cutter head drives the assembled sampling plate to move spirally downward to collect soil, and when the motor is reversed, the sampling plate will also move spirally upward, and the sampling plate will expand and reset when moving upward.

[0018] The present invention provides an automated whole-section sampling device for saline-alkali soil detection, which has the following beneficial effects:

[0019] 1. In the present automated whole-section sampling device for saline-alkali soil detection, when the motor rotates in the reverse direction, the slider will be reset first, and then drive the sampling plate to retract and reset outward. By setting the sampling plate to an expandable state, the sampling plate can be combined into a tube during sampling to completely sample the whole section of soil. When the motor is reversed, the sampling plate automatically expands to release the whole section of soil, thereby ensuring the integrity of the sampled soil. At the same time, compared with the existing push-type structure to push the soil out of the sampling tube, it can not only avoid the soil being pushed and compressed to affect the subsequent detection results, but also avoid the soil from scattering when it is pushed out of the sampling tube, thereby greatly improving the accuracy of subsequent detection.

[0020] 2. The automated whole-section sampling device for saline-alkali soil detection, by setting the bottom of the connecting strip as an inclined surface and setting the two sides of the connecting plate as inclined surfaces, can achieve that when repeatedly sampling the soil, the connecting strip and the connecting plate can respectively clean the residual soil in the second slide groove and the storage groove, thereby ensuring the normal retraction and extension of the sampling plate, greatly improving the working stability of the device, and the detachable cutter head further provides convenience for soil sampling, so that after long-term use, only the cutter head needs to be replaced to ensure the working stability of the device again, which is not only convenient for maintenance, but also low in maintenance cost, and by setting a hidden sealing groove and a sliding strip between the sampling plate and the connecting plate for connection, it can be ensured that the sealing groove will not be blocked by soil, further ensuring the stability of the normal retraction and extension of the sampling plate, thereby further improving the working stability of the device.

[0021] 3. The automated whole-section sampling device for saline-alkali soil detection can automatically complete the whole-section sampling of the soil by starting the motor through the cooperation of the auxiliary mechanism, which greatly improves the convenience of use. The device has a simple structure and low cost, which greatly reduces the sampling cost. The set preparation ring can not only protect the cutter head and prevent the cutter head from being damaged by collision, but also provide time for the folding of the sampling plate, ensuring that the sampling plate is completely folded when sampling the soil. When the motor is reversed, the sampling plate moves upward in the reverse spiral and expands outward during the upward movement to release the soil, that is, the soil is released at the same time after the device is reset, which further improves the convenience of operation and greatly improves the protection effect of the sampled soil to avoid soil scattering. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the present invention;

[0023] Figure 2It is a partial structural schematic diagram of the sampling mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the installation structure of the limit ring of the present invention;

[0025] Figure 4 It is a further structural schematic diagram of the sampling mechanism of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the mounting plate of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the rotating ring of the present invention;

[0028] Figure 7 It is a schematic diagram of the installation structure of the sampling plate and the connecting plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the split structure of the sampling plate and the connecting plate of the present invention.

[0030] In the figure: 1. mounting frame; 2. stabilizing rod; 3. sampling mechanism; 31. top plate; 32. supporting rod; 33. limiting ring; 34. fixing plate; 35. motor; 36. rotating shaft; 38. mounting plate; 39. first slide groove; 310. sampling plate; 311. storage groove; 312. connecting plate; 313. second slide groove; 314. connecting strip; 315. plug-in groove; 316. cutter head; 317. third slide groove; 318. rotating ring; 319. limiting strip; 320. slider; 321. fourth slide groove; 322. sealing groove; 323. sliding strip; 4. auxiliary mechanism; 41. sleeve; 42. threaded groove; 43. driving strip; 44. telescopic rod; 45. preparation ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] First embodiment: Figures 1 to 8 As shown, the present invention provides a technical solution: an automated whole-section sampling device for saline-alkali soil detection, comprising a mounting frame 1, a stabilizing rod 2 is fixedly connected to the inner surface of the mounting frame 1, and the stabilizing rod 2 is symmetrically fixedly connected to both sides of the mounting frame 1, and further comprising:

[0033] A sampling mechanism 3, the sampling mechanism 3 is fixedly connected to the mounting frame 1, and the sampling mechanism 3 is used to sample the soil;

[0034] Auxiliary mechanism 4, the auxiliary mechanism 4 is fixedly mounted on the sampling mechanism 3, and the auxiliary mechanism 4 is used to peel off the soil obtained by the sampling mechanism 3;

[0035] The sampling mechanism 3 includes a top plate 31, which is fixedly connected to the top outer surface of the mounting frame 1, and the top plate 31 is horizontally arranged. The outer surfaces of both ends of the top plate 31 are symmetrically fixedly connected with support rods 32, the bottom inner surface of the support rod 32 is fixedly connected with a limiting ring 33, the outer surface of the limiting ring 33 is fixedly connected to the bottom outer surface of the mounting frame 1, and the top inner surface of the support rod 32 is fixedly connected with a fixing plate 34, and the end of the fixing plate 34 away from the support rod 32 is fixedly connected with a motor 35, and the output end of the motor 35 is rotatably connected with a rotating shaft 36, and the end of the rotating shaft 36 away from the motor 35 passes through and is rotatably connected to the upper surface of the top plate 31.

[0036] One end of the rotating shaft 36 away from the motor 35 is fixedly connected to a mounting plate 38, which is disc-shaped. A first slide groove 39 is provided on the lower surface of the mounting plate 38. Four first slide grooves 39 are arranged at fixed intervals around the central axis of the mounting plate 38, and the first slide grooves 39 are arranged in a straight line.

[0037] A sampling plate 310 is provided on the lower surface of the mounting plate 38. The sampling plate 310 is arranged in an arc shape. Four sampling plates 310 are arranged at fixed intervals around the central axis of the mounting plate 38. Initially, no two sampling plates 310 are in contact with each other. Receiving grooves 311 are symmetrically provided on both sides of the sampling plate 310. A connecting plate 312 is slidably connected in the receiving groove 311.

[0038] The connecting plate 312 is arranged to be arc-shaped, and the connecting plate 312 and the sampling plate 310 are combined into a tubular shape. The inner surfaces of the connecting plate 312 and the sampling plate 310 are arranged to be the same arc-shaped surface. The inner surface of the sampling plate 310 is provided with a second slide groove 313, and a connecting strip 314 is slidably connected up and down in the second slide groove 313, and the top of the connecting strip 314 is slidably connected in the first slide groove 39.

[0039] The bottom inner surface of the connecting strip 314 is inclined, and the inner surfaces on both sides of the connecting plate 312 are also inclined. The bottom surface of the sampling plate 310 is provided with a plug-in slot 315, in which a blade head 316 is fixedly plugged, and the blade head 316 is arranged in an arc shape.

[0040] A third slide groove 317 is provided on the lower surface of the limit ring 33. The third slide groove 317 is arranged in a ring shape. The third slide groove 317 is internally rotatably connected with a rotating ring 318. A damping is arranged between the rotating ring 318 and the limit ring 33. A limit strip 319 is fixedly connected to the lower surface of the rotating ring 318. Four limit strips 319 are arranged at fixed intervals around the central axis of the rotating ring 318, and the limit strips 319 are arranged in an inclined shape.

[0041] The bottom of the limit bar 319 is slidably connected to a slider 320, and the outer surface of the sampling plate 310 is provided with a fourth slide groove 321, and the fourth slide groove 321 is arranged in a linear manner. The end of the slider 320 away from the limit bar 319 is slidably connected in the fourth slide groove 321, and the outer surfaces of both sides of the connecting plate 312 are provided with sealing grooves 322, and the inside of the sealing grooves 322 is slidably connected to the sliding bars 323, and the sliding bars 323 are fixedly connected to the inner surfaces of both sides of the sampling plate 310.

[0042] When working, the sampling device can be moved to the desired working place by holding the mounting bracket 1. When the device is used to sample soil, the motor 35 can be started. When the motor 35 is started, the rotating shaft 36 starts to rotate. When the rotating shaft 36 starts to rotate, the mounting plate 38 at the bottom thereof is driven to rotate, that is, the rotation of the mounting plate 38 drives the connecting strip 314 in the first slide groove 39 at the bottom thereof to rotate, and the connecting strip 314 is slidably inserted in the second slide groove 313 on the sampling plate 310, that is, after the motor 35 is started, the sampling plate 310 is eventually driven to rotate, that is, the rotation of the sampling plate 310 causes the cutter head 316 at the bottom of the sampling plate 310 to cut and sample the soil, and when the sampling plate 310 rotates, the sliding groove 314 on the outer surface thereof is also driven. When the sampling plate 310 rotates, the slider 320 rotates, and the end of the slider 320 away from the sampling plate 310 is slidably connected to the limit bar 319, that is, when the sampling plate 310 rotates, the slider 320 will slide along the limit bar 319, and by setting the limit bar 319 obliquely, the sampling plate 310 is driven by the motor 35 to shrink inwardly, and the sampling tube is finally retracted into a complete tube through the connection effect of the connecting plate 312. At this time, with the continuous rotation of the motor 35, the sampling plate 310 cannot continue to shrink, and the rotating ring 318 will be driven to rotate in the third slide groove 317. When the motor 35 rotates in the opposite direction, the slider 320 will be reset first, and then the sampling plate 310 will be retracted and reset outwardly. By setting the sampling plate 310 to be expandable When the motor 35 is in the tensioned state, the sampling plate 310 can be combined into a tube to sample the entire section of soil. When the motor 35 is reversed, the sampling plate 310 automatically expands to release the entire section of soil, thereby ensuring the integrity of the sampled soil. Compared with the existing push-type structure to push the soil out of the sampling tube, it can not only avoid the soil being pushed and compressed to affect the subsequent detection results, but also avoid the soil from scattering when it is pushed out of the sampling tube, thereby greatly improving the accuracy of subsequent detection. By setting the bottom of the connecting strip 314 as an inclined surface and setting the two sides of the connecting plate 312 as inclined surfaces, it can be achieved that the connecting strip 314 and the connecting plate 312 can be connected when repeatedly sampling the soil. By cleaning the soil remaining in the second slide groove 313 and the receiving groove 311 respectively, the normal retraction and extension of the sampling plate 310 can be ensured, and the working stability of the device is greatly improved. The detachable blade head 316 further provides convenience for soil sampling, so that after a long period of use, only the blade head 316 needs to be replaced to ensure the working stability of the device again. It is not only convenient for maintenance, but also has low maintenance costs. By arranging a hidden sealing groove 322 and a sliding bar 323 between the sampling plate 310 and the connecting plate 312 for connection, it can be ensured that the sealing groove 322 will not enter the soil and cause blockage, which further ensures the stability of the normal retraction and extension of the sampling plate 310, thereby further improving the working stability of the device.

[0043] Second embodiment: Figures 1 to 8As shown, the auxiliary mechanism 4 includes a sleeve 41, the bottom of the sleeve 41 is fixedly connected to the upper surface of the limiting ring 33, the top inner surface of the sleeve 41 is rotatably connected to the side surface of the mounting plate 38, and the inner surface of the sleeve 41 is provided with a threaded groove 42.

[0044] A driving bar 43 is slidably connected in the threaded groove 42, a telescopic rod 44 is fixedly connected to the inner surface of the driving bar 43, one end of the telescopic rod 44 away from the driving bar 43 is fixedly connected to the top outer surface of the sampling plate 310, a preparation ring 45 is fixedly connected to the bottom of the support rod 32, and a protruding knife head 316 is set at the bottom of the preparation ring 45.

[0045] When working, after the handheld mounting frame 1 moves the device to the specified position, the preparation ring 45 can be placed on the ground where soil needs to be collected. As the motor 35 starts, the sampling plate 310 is driven to rotate, and the telescopic rod 44 on the top surface of the sampling plate 310 is driven to rotate at the same time, that is, the driving bar 43 at the end of the telescopic rod 44 is rotated, and the driving bar 43 is slidably connected in the thread groove 42. When the driving bar 43 is driven by the telescopic rod 44 to rotate, the rotating bar will also move downward along the thread groove 42, thereby driving the sampling plate 310 to move downward, that is, the sampling plate 310 will move downward at the same time when it is driven to rotate by the motor 35. At this time, the cutter head 316 gradually moves down close to the ground. When the cutter head 316 contacts the ground, the sampling plate 310 is completely retracted, that is, as the motor 35 continues to drive, the cutter head 316 drives the assembled sampling plate 310 to spirally move downward to collect soil, and when the motor 35 reverses, the sampling plate 3 10 will also move upward in a spiral, and the sampling plate 310 will expand and reset during the upward movement, thereby realizing the cooperation of the auxiliary mechanism 4 and starting the motor 35 to automatically complete the sampling of the entire section of the soil, which greatly improves the convenience of use. The device has a simple structure and low cost, which greatly reduces the sampling cost. The set preparation ring 45 can not only protect the cutter head 316 and prevent the cutter head 316 from being damaged by collision, but also provide time for the folding of the sampling plate 310 to ensure that the sampling plate 310 is completely folded when sampling the soil. When the motor 35 is reversed, the sampling plate 310 moves upward in a reverse spiral and expands outward during the upward movement to release the soil, that is, the soil is released at the same time after the device is reset, which further improves the convenience of operation and greatly improves the protection effect of the sampled soil to avoid soil scattering.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. An automated whole-section sampling device for saline-alkali soil detection, comprising a mounting frame (1), characterized in that: The inner surface of the mounting frame (1) is fixedly connected to a stabilizing rod (2), and the stabilizing rod (2) is symmetrically fixedly connected to two sides of the mounting frame (1), and further comprises: A sampling mechanism (3), the sampling mechanism (3) being fixedly connected to the mounting frame (1), and the sampling mechanism (3) being used for sampling soil; An auxiliary mechanism (4), the auxiliary mechanism (4) being fixedly mounted on the sampling mechanism (3), and the auxiliary mechanism (4) being used to peel off the soil obtained by the sampling mechanism (3); The sampling mechanism (3) comprises a top plate (31), the top plate (31) being fixedly connected to the top outer surface of the mounting frame (1), the top plate (31) being arranged horizontally, the outer surfaces of both ends of the top plate (31) being symmetrically fixedly connected to support rods (32), the bottom inner surface of the support rod (32) being fixedly connected to a limit ring (33), the outer surface of the limit ring (33) being fixedly connected to the bottom outer surface of the mounting frame (1), the top inner surface of the support rod (32) being fixedly connected to a fixing plate (34), the end of the fixing plate (34) away from the support rod (32) being fixedly connected to a motor (35), the output end of the motor (35) being rotatably connected to a rotating shaft (36), the end of the rotating shaft (36) away from the motor (35) passing through and rotatably connected to the upper surface of the top plate (31); One end of the rotating shaft (36) away from the motor (35) is fixedly connected to a mounting plate (38), the mounting plate (38) being arranged in a disc shape, a first slide groove (39) being provided on a lower surface of the mounting plate (38), four first slide grooves (39) being arranged at fixed intervals around a central axis of the mounting plate (38), and the first slide grooves (39) being arranged in a straight line; A sampling plate (310) is provided on the lower surface of the mounting plate (38), the sampling plate (310) being arranged in an arc shape, four sampling plates (310) being arranged at fixed intervals around the central axis of the mounting plate (38), and no two of the sampling plates (310) are in contact with each other initially, and receiving grooves (311) are symmetrically provided on both sides of the sampling plate (310), and a connecting plate (312) is slidably connected in the receiving groove (311); The connecting plate (312) is configured to be arc-shaped. The connecting plate (312) and the sampling plate (310) are combined into a tubular shape. The inner surfaces of the connecting plate (312) and the sampling plate (310) are configured to be the same arc-shaped surface. The inner surface of the sampling plate (310) is provided with a second slide groove (313). A connecting strip (314) is slidably connected up and down in the second slide groove (313). The top of the connecting strip (314) is slidably connected in the first slide groove (39).

2. The automatic whole-section sampling device for saline-alkali soil detection according to claim 1 is characterized in that: The bottom inner surface of the connecting strip (314) is arranged to be inclined, and the inner surfaces on both sides of the connecting plate (312) are also arranged to be inclined surfaces. The bottom surface of the sampling plate (310) is provided with a plug-in groove (315), and a cutter head (316) is fixedly plugged into the plug-in groove (315). The cutter head (316) is arranged to be arc-shaped.

3. The automatic whole-section sampling device for saline-alkali soil detection according to claim 2 is characterized in that: A third slide groove (317) is provided on the lower surface of the limiting ring (33), and the third slide groove (317) is arranged in a ring shape. A rotating ring (318) is rotatably connected inside the third slide groove (317), and a damper is arranged between the rotating ring (318) and the limiting ring (33). A limiting strip (319) is fixedly connected to the lower surface of the rotating ring (318), and four limiting strips (319) are arranged at fixed intervals around the central axis of the rotating ring (318), and the limiting strips (319) are arranged in an inclined shape.

4. The automatic whole-section sampling device for saline-alkali soil detection according to claim 3 is characterized in that: A slider (320) is slidably connected to the bottom of the limit bar (319), a fourth slide groove (321) is provided on the outer surface of the sampling plate (310), and the fourth slide groove (321) is arranged in a linear manner. One end of the slider (320) away from the limit bar (319) is slidably connected in the fourth slide groove (321), and sealing grooves (322) are provided on the outer surfaces of both sides of the connecting plate (312), and sliding bars (323) are slidably connected inside the sealing grooves (322), and the sliding bars (323) are fixedly connected to the inner surfaces of both sides of the sampling plate (310).

5. The automatic whole-section sampling device for saline-alkali soil detection according to claim 4 is characterized in that: The auxiliary mechanism (4) comprises a sleeve (41), the bottom of the sleeve (41) is fixedly connected to the upper surface of the limiting ring (33), the top inner surface of the sleeve (41) is rotatably connected to the side surface of the mounting plate (38), and the inner surface of the sleeve (41) is provided with a threaded groove (42).

6. The automatic whole-section sampling device for saline-alkali soil detection according to claim 5, characterized in that: A driving bar (43) is slidably connected in the thread groove (42), a telescopic rod (44) is fixedly connected to the inner surface of the driving bar (43), one end of the telescopic rod (44) away from the driving bar (43) is fixedly connected to the top outer surface of the sampling plate (310), and a preparation ring (45) is fixedly connected to the bottom of the support rod (32), and a protruding cutter head (316) is provided at the bottom of the preparation ring (45).

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