Detection device and method for saline-alkali soil

Abstract

The invention discloses a detection device and method for saline-alkali soil, belongs to the field of soil detection, and solves the problem that a probe part of an existing soil saline-alkali detector is prone to colliding with stones in the soil, and the detection device comprises a detector body, a connecting end and a probe. The probe can be assisted to stably enter a target position in the soil, the influence of stones in the soil on the probe is reduced, and the situation that the top end of the probe is sunken and broken after the probe collides with the stones is prevented, so that the stability of equipment during operation is ensured, the service life of the whole equipment is prolonged, and the working efficiency is improved. And the opening part of the protective shell can be quickly opened or closed subsequently, so that the probe can conveniently penetrate into the soil and stably detect the saline-alkaline property in the soil, and when the soil in the area is subjected to multi-point detection, the insertion depth of the probe is in the same state every time, so that the accuracy of data detected by the equipment is ensured.

Description

Technical Field

[0001] The invention belongs to the field of soil detection, and in particular relates to a detection device and method for saline-alkali soil. Background Art

[0002] Soil environmental monitoring refers to an important measure to understand the status of soil environmental quality. With the purpose of preventing and controlling the hazards of soil pollution, the dynamic analysis and determination of the degree of soil pollution and development trend is carried out. Soil testing requires multiple processes, including detecting the acidity and alkalinity of the soil to identify whether the local soil is suitable for the cultivation of crops. When testing saline-alkali soil, the probe part of the special acidity and alkalinity detector will be inserted into the target soil to identify the acidity and alkalinity of the soil according to the size of the internal conductivity of the soil. It is a commonly used detection device for soil testing.

[0003] Chinese utility model patent CN216956022U discloses a soil salinity detection device for saline-alkali land treatment, including a detector host, a hub, a moisture sensor, a PH sensor, a salt sensor, and a temperature and humidity sensor. A data interface is provided on the top of the detector host, and the hub is connected to the data interface through a wire and a connector. When in use, after each sensor is inserted into the soil, the overlong data line can be wrapped around any first plug rod or second plug rod, and then the ends of the first plug rod and the second plug rod are inserted into the soil, so as to prevent the data line from falling off the first plug rod or the second plug rod, thereby realizing the data line arrangement function;

[0004] When the above-mentioned soil salinity detection device is in use, the excessively long data cable is wrapped around the first plug rod or the second plug rod to achieve the arrangement of the data cable of the soil detection device. However, there are certain problems with the above-mentioned design when it is used. Specifically, the probe part of the detection device is not equipped with a protective component, which causes the probe to collide with stones mixed in the soil during the insertion process of the probe into the undeveloped soil, causing the top of the probe to deform and break, thereby affecting the service life of the probe itself. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions.

[0007] A detection device for saline-alkali soil comprises a detector body, a connecting end and a probe, wherein the connecting end is fixedly installed below the detector body, the probe is fixedly installed below the connecting end, a protective mechanism is slidably installed outside the probe, the protective mechanism comprises a protective shell, a sliding groove and a shielding assembly, the protective shell is slidably installed on the outer surface of the probe, a sliding groove is provided inside the protective shell, the sliding groove is slidably connected to the probe, the shielding assembly is fixedly installed at the bottom of the protective shell, and pulling mechanisms are symmetrically fixedly installed on both sides of the protective shell.

[0008] As a preferred technical solution of the present invention, the shielding assembly includes a side shell, a rotating rod, a shielding plate and a torsion spring. The side shell is fixedly installed on one side below the protective shell, the rotating rod is fixedly installed inside the side shell, the shielding plate is rotatably installed outside the rotating rod, and the torsion spring is symmetrically arranged on both sides of the end of the shielding plate.

[0009] As a preferred technical solution of the present invention, the shielding plate includes a shielding cover and a rotating connecting frame, the rotating connecting frame is rotatably installed on the outside of the rotating rod, the shielding cover is fixedly installed on the side of the rotating connecting frame, and the shielding cover shields and closes the opening part of the bottom end of the protective shell.

[0010] As a preferred technical solution of the present invention, the pulling mechanism includes a mounting seat, a linkage rod, a pulling rod, a first spring and a positioning assembly. The mounting seat is fixedly installed on the side of the protective shell, the linkage rod is fixedly installed on the upper surface of the mounting seat, the pulling rod is fixedly installed on the top of the linkage rod, and a first spring is arranged between the upper surface of the pulling rod and the connecting end. When the pulling rod slides toward the side close to the connecting end, the first spring is in a force storage state, and the positioning assembly is arranged on the outer surface of the linkage rod.

[0011] As a preferred technical solution of the present invention, the positioning assembly includes a positioning ball and a moving block. The positioning ball is slidably installed on the outer surface of the linkage rod, and the moving block is fixedly installed on the top of the positioning ball. The moving block is slidably connected to the linkage rod, and the outer surface of the linkage rod is equidistantly provided with scale grooves that display the moving distance of the positioning ball.

[0012] As a preferred technical solution of the present invention, the positioning assembly also includes an extrusion thread seat and an extrusion screw, the extrusion thread seat is fixedly mounted on the side of the moving block, the extrusion screw thread is installed inside the extrusion thread seat, and the extrusion screw penetrates the extrusion thread seat and is in extrusion contact with the side wall of the linkage rod.

[0013] As a preferred technical solution of the present invention, the detection device for saline-alkali soil also includes a matching mechanism for assisting staff in picking up the soil, and the matching mechanism includes a top plate, a connecting block and a ring. The top plate is fixedly mounted on the upper surface of the detector body, the connecting block is fixedly mounted on the top of the top plate, the ring is arranged above the connecting block, and the connecting rope at the bottom of the ring passes through a limiting groove provided inside the connecting block.

[0014] As a preferred technical solution of the present invention, the matching mechanism also includes level bubbles, and the level bubbles are fixedly installed on the upper surface of the top plate at equal intervals.

[0015] A method for using a detection device for saline-alkali soil proposed in the present invention comprises the following steps:

[0016] S1. Calibration parameters: by manipulating and using the detector body, the detection data of the entire detection device is calibrated and reset to zero to ensure the accuracy of subsequent soil salinity and alkalinity detection data;

[0017] S2. Insertion into the soil. By using the ring, the user passes his hand through the ring and grabs the side of the detector body, then presses the detector body to insert the end of the probe into the soil to be tested. During the insertion process, the insertion angle of the entire detection device is controlled by using a level bubble, so that the probe can enter the soil perpendicular to the ground;

[0018] S3, protection and detection, by pressing the upper end of the detector body, the probe drives the protection mechanism to be inserted into the soil. The use of the protection mechanism provides protection for the end of the probe. When the probe moves to the target depth, by pulling the pull rod, the protection mechanism as a whole moves upward along the outer surface of the probe under the drive of the linkage rod. At this time, the position of the probe itself remains unchanged, and the protective shell slides along the probe. The end of the probe pushes the position of the shielding plate, so that the bottom opening of the protective shell is exposed. At this time, the end of the probe can pass through the protective shell to stably detect the target soil;

[0019] S4, reset and protection. When the detection is completed, by loosening the pulling rod, the first spring will release its accumulated elastic force, pushing the linkage rod and the protection mechanism to reset. Because the push and squeeze of the probe are lost, the shielding plate automatically resets under the action of the torsion spring, completing the protection of the top of the probe. In addition, during the reset process of the protective shell, the dirt adhering to the outer surface of the probe is cleaned;

[0020] S5. Complete the test. Use the probe to test the internal conductivity of the soil, and then quickly analyze and identify the specific situation of soil salinity and alkalinity based on the monitored conductivity data.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) In the present invention, by setting up a protective mechanism and a pulling mechanism, the probe can be assisted to stably enter the target position inside the soil, reduce the impact of stones in the soil on the probe, and prevent the probe from colliding with stones and causing the top of the probe to be sunken or broken. This ensures the stability of the equipment during operation and extends the service life of the equipment as a whole. The opening of the protective shell can be quickly opened or closed later to facilitate the probe to pass through the soil and stably detect the salinity and alkalinity of the soil. When performing multi-point detection on the soil in the area, the depth of the probe insertion is in the same state each time, ensuring the accuracy of the equipment detection data.

[0023] (2) In the present invention, a matching mechanism is provided to assist the user to stably and safely insert the probe into the soil to be tested. The user passes the hand through the ring and sets the ring on the wrist, which can ensure the stability and safety of the user when pressing the device as a whole. The angle of the device during insertion can be calibrated later to ensure that the probe is always perpendicular to the ground when inserted into the soil, so that the length of the probe inserted into the soil each time is in the same state, thereby ensuring the stability of the device during operation and the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention.

[0025] Figure 2 It is a three-dimensional diagram of the structure below the connecting end of the present invention.

[0026] Figure 3 It is a three-dimensional diagram of the protective mechanism structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the shielding component in the present invention.

[0028] Figure 5 It is a structural schematic diagram of the pulling mechanism in the present invention.

[0029] Figure 6 It is a schematic diagram of the structure of the positioning component in the present invention.

[0030] Figure 7 It is a structural schematic diagram of the matching mechanism in the present invention.

[0031] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0032] 1. Detector body; 2. Connecting end; 3. Probe; 4. Protective mechanism; 41. Protective shell; 42. Sliding groove; 43. Shielding assembly; 431. Side shell; 432. Rotating rod; 433. Shielding plate; 434. Torsion spring; 5. Pulling mechanism; 51. Mounting seat; 52. Linking rod; 53. Pulling rod; 54. First spring; 55. Positioning assembly; 551. Positioning ball; 552. Moving block; 553. Extrusion thread seat; 554. Extrusion screw; 6. Matching mechanism; 61. Top plate; 62. Connecting block; 63. Ring; 64. Level bubble. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0036] Depend on Figure 1 , Figure 2 and Figure 3 As shown, a detection device for saline-alkali soil includes a detector body 1, a connecting end 2 and a probe 3. The connecting end 2 is fixedly installed below the detector body 1, and the probe 3 is fixedly installed below the connecting end 2. A protective mechanism 4 is slidably installed on the outside of the probe 3. The protective mechanism 4 includes a protective shell 41, a sliding groove 42 and a shielding assembly 43. The protective shell 41 is slidably installed on the outer surface of the probe 3, and a sliding groove 42 is opened inside the protective shell 41. The sliding groove 42 is slidably connected to the probe 3, and the shielding assembly 43 is fixedly installed on the bottom of the protective shell 41. Pulling mechanisms 5 are symmetrically fixedly installed on both sides of the protective shell 41.

[0037] During use, the detection device is moved as a whole to the target position, and then the probe 3 is aligned with the soil to be detected, the detector body 1 is pressed as a whole, and the probe 3 and the protective mechanism 4 are inserted into the soil simultaneously. At this time, the protective mechanism 4 can provide sufficient protection for the end of the probe 3. Through the cooperation of the protective shell 41 and the shielding component 43, the top of the probe 3 contacts the internal components of the shielding component 43, and the position and angle of the internal components of the shielding component 43 do not change under the squeezing of the soil. At this time, under the action of the protective shell 41 and the shielding component 43, the end of the probe 3 is protected to prevent the end of the probe 3 from contacting and squeezing with stones inside the soil during the insertion process. The end of the probe 3 is deformed to ensure the stability of the probe 3 when in use. Then, the position of the overall component of the protective mechanism 4 is adjusted by using the pulling mechanism 5, so that the probe 3 can pass through the protective shell 41 and fully contact the soil. At this time, the probe 3, with the cooperation of the detector body 1, detects the internal conductivity of the soil. Then, the detector body 1 analyzes the detected data and identifies the salinity and alkalinity of the soil itself according to the size of the electrical conductivity in the soil, thereby completing the soil detection stably and safely. When the equipment is not in use, the protective shell 41 can also seal the sharper end of the probe to prevent the probe from colliding with other components and causing unnecessary losses.

[0038] By the attached Figure 4 As shown, in this embodiment, the shielding assembly 43 includes a side shell 431, a rotating rod 432, a shielding plate 433 and a torsion spring 434. The side shell 431 is fixedly installed on one side below the protective shell 41, the rotating rod 432 is fixedly installed inside the side shell 431, the shielding plate 433 is rotatably installed outside the rotating rod 432, and the torsion spring 434 is symmetrically arranged on both sides of the end of the shielding plate 433.

[0039] During use, driven by the pulling mechanism 5, the protective shell 41 slides along the outer surface of the probe 3. At this time, the position of the probe 3 is fixed. During the sliding of the protective shell 41, the end of the probe 3 will contact the shielding plate 433. Through the change of the moving distance of the protective shell 41, the shielding plate 433 is pushed by the probe 3 and rotates along the outside of the rotating rod 432 to open the opening at the bottom end of the protective shell 41. During the rotation of the shielding plate 433, the torsion spring 434 is in a power storage state, which is convenient for the probe 3 to pass through the protective shell 41 and contact the soil. Subsequently, the probe 3 can stably detect the soil. Once the detection is completed, the user releases the pulling mechanism 5, the protective shell 41 loses the external pulling force and slides to the bottom, and the distance between the baffle plate 433 and the probe 3 changes until the probe 3 re-enters the protective shell 41. At this time, the baffle plate 433 loses the squeezing and pushing of the probe 3, and the baffle plate 433 will automatically reset under the action of the torsion spring 434, and close the end of the protective shell 41 to complete the protection of the probe 3 as a whole. In the process of the protective shell 41 sliding along the outer surface of the probe 3, the soil adhering to the outer surface of the probe 3 can be pushed and cleaned to ensure the overall cleanliness of the probe 3.

[0040] By the attached Figure 4 As shown, in this embodiment, the shielding plate 433 includes a shielding cover plate and a rotating connecting frame, the rotating connecting frame is rotatably installed on the outside of the rotating rod 432, the shielding cover plate is fixedly installed on the side of the rotating connecting frame, and the shielding cover plate shields and closes the opening part at the bottom end of the protective shell 41.

[0041] During use, the shielding cover is used to form a complete shield for the opening part at the bottom of the protective shell 41, and the probe 3 inside the protective shell 41 is protected to prevent the end of the probe 3 from colliding with stones inside the soil during the insertion of the probe 3 and the protective shell 41 into the soil. When the protective shell 41 slides along the outer surface of the probe 3 under the pull of the pulling mechanism 5, the shielding cover will be pushed by the probe 3, and the angle of the shielding cover itself will rotate along the outer surface of the rotating rod 432 with the cooperation of the rotating connecting frame, so as to realize the change of the angle of the shielding cover and assist the probe 3 to pass through the protective shell 41 and enter the soil.

[0042] By the attached Figure 5As shown, in this embodiment, the pulling mechanism 5 includes a mounting seat 51, a linkage rod 52, a pulling rod 53, a first spring 54 and a positioning assembly 55. The mounting seat 51 is fixedly mounted on the side of the protective shell 41, the linkage rod 52 is fixedly mounted on the upper surface of the mounting seat 51, the pulling rod 53 is fixedly mounted on the top of the linkage rod 52, and a first spring 54 is arranged between the upper surface of the pulling rod 53 and the connecting end 2. When the pulling rod 53 slides toward the side close to the connecting end 2, the first spring 54 is in a force storage state, and the positioning assembly 55 is arranged on the outer surface of the linkage rod 52.

[0043] During use, by pulling the pulling rod 53, driven by the linkage rod 52, the mounting seat 51 will drive the protection mechanism 4 to slide along the outer surface of the probe 3, and clean the soil adhered to the soil during the insertion of the probe 3 into the soil. At this time, as the position of the linkage rod 52 moves and rises, the first spring 54 is in a force storage state, and the overall position of the protection mechanism 4 changes. The overall position of the probe 3 relative to the protective shell 41 slides downward, which will push the position of the shielding plate 433, and open the opening at the end of the protective shell 41, so that the probe 3 can be inserted into the soil. When the probe 3 has completed the soil salinity and alkalinity detection, the user releases the pull on the pulling rod 53, and the first spring 54 releases its accumulated elastic force to push the linkage rod 52 and the protective mechanism 4 to move to the bottom, thereby cleaning the soil at the end of the probe 3. During the pushing process, the distance between the shielding plate 433 and the probe 3 changes, and the probe 3 no longer squeezes the surface of the shielding plate 433, so that the shielding plate 433 automatically resets with the cooperation of the torsion spring 434, thereby closing the opening at the bottom of the protective shell 41, which is convenient for subsequent soil detection.

[0044] By the attached Figure 6 As shown, in this embodiment, the positioning assembly 55 includes a positioning ball 551 and a moving block 552. The positioning ball 551 is slidably installed on the outer surface of the linkage rod 52, and the moving block 552 is fixedly installed on the top of the positioning ball 551. The moving block 552 is slidably connected to the linkage rod 52, and the outer surface of the linkage rod 52 is equidistantly provided with scale grooves that display the moving distance of the positioning ball 551.

[0045] During use, the positions of the positioning ball 551 and the moving block 552 are adjusted by pushing the positioning ball 551. According to the scale grooves on the outer surface of the linkage rod 52, the user can clearly observe the distance between the positioning ball 551 and the end of the probe 3. When the probe 3 is inserted into the soil, once the soil surface contacts the bottom of the moving block 552, it indicates that the depth of the probe 3 inserted into the soil reaches a predetermined length. At this time, the probe 3 can detect the soil at a predetermined depth. When the salinity and alkalinity of the soil in this area are tested multiple times subsequently, the auxiliary probe 3 is used to test the soil at the same depth to ensure the accuracy of the soil test data.

[0046] By the attached Figure 6 As shown, in this embodiment, the positioning assembly 55 also includes an extrusion threaded seat 553 and an extrusion screw 554. The extrusion threaded seat 553 is fixedly installed on the side of the moving block 552, and the extrusion screw 554 is threadedly installed inside the extrusion threaded seat 553. The extrusion screw 554 penetrates the extrusion threaded seat 553 and is in extrusion contact with the side wall of the linkage rod 52.

[0047] During use, when the positioning ball 551 moves to the target position, the extrusion screw 554 is rotated into the extrusion thread seat 553, and the extrusion screw 554 is passed through the extrusion thread seat 553 and into the moving block 552 by utilizing the external thread of the extrusion screw 554, thereby squeezing the outer wall of the linkage rod 52 to lock the overall position of the positioning ball 551.

[0048] By the attached Figure 7 As shown, in this embodiment, the detection device for saline-alkali soil also includes a matching mechanism 6 for assisting staff in picking up, and the matching mechanism 6 includes a top plate 61, a connecting block 62 and a ring 63. The top plate 61 is fixedly mounted on the upper surface of the detector body 1, the connecting block 62 is fixedly mounted on the top of the top plate 61, the ring 63 is arranged above the connecting block 62, and the connecting rope at the bottom end of the ring 63 passes through the connecting block 62 to open a limiting groove.

[0049] During use, the user passes the hand through the inner circle of the ring 63 and puts the ring 63 on the wrist, and then the user grasps the outer surface of the detector body 1 with the hand. At this time, the user can stably push and press the detector body 1 to insert the probe 3 and the protective mechanism 4 at the bottom of the detector body 1 into the soil, which changes the traditional way of using the user's hand to directly grasp the outer wall of the detector body 1, and ensures the stability of the overall detection device during use.

[0050] By the attached Figure 7 As shown, in this embodiment, the matching mechanism 6 also includes a level bubble 64, and the level bubble 64 is fixedly installed on the upper surface of the top plate 61 at equal intervals.

[0051] During use, by using the level bubble 64, the user observes the position of the water bubble in the three groups of level bubbles 64 to identify whether the overall angle of the detector body 1 is perpendicular to the soil surface, so that when the detection device detects the soil in the area, the depth of the probe 3 inserted into the soil can be kept uniform each time.

[0052] By the attached Figures 1 to 7 As shown, a method for using a detection device for saline-alkali soil comprises the following steps:

[0053] S1, calibration parameters, through the control and use of the detector body 1, the detection data of the entire detection device is calibrated and zeroed to ensure the accuracy of subsequent soil salinity and alkalinity detection data;

[0054] S2. Inserting into the soil. By using the collar 63, the user passes his hand through the collar 63 and grabs the side of the detector body 1. Then, the detector body 1 is pressed to insert the end of the probe 3 into the soil to be tested. During the insertion process, the insertion angle of the entire detection device is controlled by using the level bubble 64, so that the probe 3 can enter the soil in a manner perpendicular to the ground.

[0055] S3, protection and detection, by pressing the upper end detector body 1, the probe 3 drives the protection mechanism 4 to be inserted into the soil, and the use of the protection mechanism 4 provides protection for the end of the probe 3. When the probe 3 moves to the target depth, by pulling the pull rod 53, the protection mechanism 4 as a whole moves upward along the outer surface of the probe 3 under the drive of the linkage rod 52. At this time, the position of the probe 3 itself remains unchanged, and the protection shell 41 slides along the probe 3. The end of the probe 3 pushes the position of the shielding plate 433, so that the bottom opening of the protection shell 41 is exposed. At this time, the end of the probe 3 can pass through the protection shell 41 to stably detect the target soil;

[0056] S4, reset and protection, when the detection is completed, by loosening the pulling rod 53, the first spring 54 will release its own accumulated elastic force, push the linkage rod 52 and the protection mechanism 4 to reset, because the push and squeeze of the probe 3 are lost, the shielding plate 433 automatically resets under the action of the torsion spring 434, completes the protection of the top of the probe 3, and in the process of resetting the protective shell 41, the dirt adhering to the outer surface of the probe 3 is cleaned;

[0057] S5. Complete the test. By using the probe 3, the internal conductivity of the soil is tested, and then the specific situation of the soil salinity and alkalinity is identified by rapid analysis based on the data of the monitored conductivity.

[0058] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A detection device for saline-alkali soil, comprising a detector body (1), a connection end (2) and a probe (3), wherein the connection end (2) is fixedly mounted below the detector body (1), and the probe (3) is fixedly mounted below the connection end (2), characterized in that: A protective mechanism (4) is slidably mounted on the outside of the probe (3), the protective mechanism (4) comprising a protective shell (41), a sliding groove (42) and a shielding assembly (43); the protective shell (41) is slidably mounted on the outer surface of the probe (3); a sliding groove (42) is provided inside the protective shell (41), the sliding groove (42) is slidably connected to the probe (3); the shielding assembly (43) is fixedly mounted on the bottom end of the protective shell (41); and pulling mechanisms (5) are symmetrically fixedly mounted on both sides of the protective shell (41).

2. The detection device for saline-alkali soil according to claim 1, characterized in that: The shielding assembly (43) comprises a side shell (431), a rotating rod (432), a shielding plate (433) and a torsion spring (434); the side shell (431) is fixedly mounted on one side below the protective shell (41); the rotating rod (432) is fixedly mounted inside the side shell (431); the shielding plate (433) is rotatably mounted outside the rotating rod (432); and the torsion spring (434) is symmetrically arranged on both sides of the end of the shielding plate (433).

3. The detection device for saline-alkali soil according to claim 2, characterized in that: The shielding plate (433) comprises a shielding cover plate and a rotating connection frame, wherein the rotating connection frame is rotatably mounted on the outside of the rotating rod (432), and the shielding cover plate is fixedly mounted on the side of the rotating connection frame, and the shielding cover plate shields and closes the bottom opening portion of the protective housing (41).

4. The detection device for saline-alkali soil according to claim 3, characterized in that: The pulling mechanism (5) comprises a mounting seat (51), a linkage rod (52), a pulling rod (53), a first spring (54) and a positioning assembly (55); the mounting seat (51) is fixedly mounted on the side of the protective housing (41); the linkage rod (52) is fixedly mounted on the upper surface of the mounting seat (51); the pulling rod (53) is fixedly mounted on the top of the linkage rod (52); a first spring (54) is arranged between the upper surface of the pulling rod (53) and the connecting end (2); when the pulling rod (53) slides toward the side close to the connecting end (2), the first spring (54) is in a force storage state; and the positioning assembly (55) is arranged on the outer surface of the linkage rod (52).

5. The detection device for saline-alkali soil according to claim 4, characterized in that: The positioning assembly (55) comprises a positioning ball (551) and a moving block (552); the positioning ball (551) is slidably mounted on the outer surface of the linkage rod (52); the moving block (552) is fixedly mounted on the top of the positioning ball (551); the moving block (552) is slidably connected to the linkage rod (52); and the outer surface of the linkage rod (52) is provided with graduated grooves at equal intervals for displaying the moving distance of the positioning ball (551).

6. The detection device for saline-alkali soil according to claim 5, characterized in that: The positioning assembly (55) further comprises an extrusion thread seat (553) and an extrusion screw rod (554), wherein the extrusion thread seat (553) is fixedly mounted on the side of the moving block (552), the extrusion screw rod (554) is threadedly mounted inside the extrusion thread seat (553), and the extrusion screw rod (554) penetrates the extrusion thread seat (553) and is in extrusion contact with the side wall of the linkage rod (52).

7. The detection device for saline-alkali soil according to claim 1, characterized in that: The detection device for saline-alkali soil also includes a matching mechanism (6) for assisting a worker in picking up the soil. The matching mechanism (6) includes a top plate (61), a connecting block (62) and a collar (63). The top plate (61) is fixedly mounted on the upper surface of the detector body (1). The connecting block (62) is fixedly mounted on the top of the top plate (61). The collar (63) is arranged above the connecting block (62). A connecting rope at the bottom end of the collar (63) passes through a limiting groove in the connecting block (62).

8. The detection device for saline-alkali soil according to claim 7, characterized in that: The matching mechanism (6) further comprises level bubbles (64), and the level bubbles (64) are fixedly mounted at equal intervals on the upper surface of the top plate (61).

9. The method for using the detection device for saline-alkali soil according to any one of claims 1 to 8, characterized in that: The steps include: S1, calibration parameters, through the control and use of the detector body (1), the detection data of the entire detection device is calibrated and reset to zero, so as to ensure the accuracy of subsequent soil salinity and alkalinity detection data; S2, inserting into the soil, by using the collar (63), the user passes the collar (63) through the side of the detector body (1), and then presses the detector body (1) to insert the end of the probe (3) into the soil to be tested, and during the insertion process, the horizontal bubble (64) is used to control the insertion angle of the entire detection device, so that the probe (3) can enter the soil in a manner perpendicular to the ground; S3, protection and detection, by pressing the upper end detector body (1), the probe (3) drives the protection mechanism (4) to be inserted into the soil, and by using the protection mechanism (4), the end of the probe (3) is protected. When the probe (3) moves to the target depth, by pulling the pulling rod (53), the protection mechanism (4) as a whole moves upward along the outer surface of the probe (3) under the drive of the linkage rod (52). At this time, the position of the probe (3) itself remains unchanged, and the protection shell (41) slides along the probe (3). The end of the probe (3) pushes the position of the shielding plate (433), so that the bottom opening of the protection shell (41) is exposed. At this time, the end of the probe (3) can pass through the protection shell (41) to stably detect the target soil; S4, reset and protection, when the detection is completed, by loosening the pulling rod (53), the first spring (54) will release its own accumulated elastic force, push the linkage rod (52) and the protective mechanism (4) to reset, because the push and squeeze of the probe (3) are lost, the shielding plate (433) automatically resets under the action of the torsion spring (434), completes the protection of the top of the probe (3), and in the process of resetting the protective shell (41), the dirt adhering to the outer surface of the probe (3) is cleaned; S5. After the test is completed, the internal conductivity of the soil is tested by using the probe (3), and then the specific situation of the soil salinity and alkalinity is identified through rapid analysis based on the data of the monitored conductivity.

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