Soil wind erosion field fixed-point measurement device

Abstract

The invention relates to the technical field of soil wind erosion measurement, in particular to a soil wind erosion field fixed-point measurement device which comprises a ground fixing ring, an upper ring is arranged on the upper side of the ground fixing ring, a top cover is fixed to the upper surface of the upper ring, the upper ring and the ground fixing ring are connected through a ventilated exhaust mechanism, and a laser detection ring is installed in the top cover. The air exhaust mechanism comprises a plurality of air exhaust assemblies capable of rotating through power, the two ends of each air exhaust assembly are rotationally connected with the upper ring and the ground fixing ring correspondingly, and air can pass through the air exhaust assemblies. The to-be-detected ground can be separated from the external environment through the ground fixing ring, the air exhaust assembly, the upper ring and the top cover, wind force is applied to the ground within the range of the ground fixing ring through the air blowing mechanism, air flow generated by blowing of the wind drives blown soil to be attached to the surface of the air exhaust assembly, and then after the soil rotates to the outer side along with the air exhaust assembly, the air exhaust assembly is started. The blown-away soil is transferred to the outer side of the ground fixing ring, wind erosion is generated on the ground through wind power generated by equipment, and the influence of the external environment on wind erosion detection is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of soil wind erosion measurement, in particular to a field fixed-point measurement device for soil wind erosion. Background Art

[0002] Wind erosion, or wind-induced erosion, refers to the process by which surface material is eroded, abraded, and carried away by wind. Wind erosion is also a major driver of soil degradation and desertification in arid and semi-arid regions of northern my country. It serves as a key indicator for determining soil loss and desertification, and is a crucial basis for soil classification, desertification prevention plans, and wind erosion prevention measures. Therefore, measuring soil wind erosion is crucial for soil and water conservation and preventing desertification.

[0003] Chinese patent CN207882126U discloses a field fixed-point measurement device for soil wind erosion, comprising a square measurement frame, a support rod connected to the bottom of the square measurement frame, a lateral movement ruler fixedly connected to the square measurement frame, a sliding block connected to the lateral movement ruler, a distance measuring probe of a laser rangefinder mounted on the sliding block, and the distance measuring probe being perpendicular to the lateral movement ruler. The field fixed-point measurement device for soil wind erosion described in this utility model is capable of deploying a large number of fixed sample plots in the field for observations at multiple time scales. Through reasonable settings, it can accurately measure the wind erosion thickness of the soil surface, and then calculate the wind erosion amount and wind erosion modulus, thereby representing the wind erosion characteristics of a specific area.

[0004] The above-mentioned related technologies have the following defects: in the field ground wind erosion detection, the wind erosion amount and wind erosion modulus are measured by detecting the rate of soil loss at different wind speeds and different times. However, in the existing technology, fixed-point measurements are generally in an open environment and are greatly affected by the environment, resulting in inaccurate data. Summary of the Invention

[0005] In order to reduce the influence of the external environment during wind erosion detection, the present invention provides a field fixed-point measurement device for soil wind erosion.

[0006] The present invention provides a field fixed-point measurement device for soil wind erosion, which adopts the following technical solution: it includes a ground-fixing ring, an upper ring is provided on the upper side of the ground-fixing ring, a top cover is fixed on the upper surface of the upper ring, the upper ring and the ground-fixing ring are connected by a ventilated exhaust mechanism, and a laser detection ring is installed inside the top cover.

[0007] The exhaust mechanism includes a plurality of exhaust components that can be rotated by power, and the two ends of the exhaust components are respectively rotatably connected to the upper ring and the fixed ring, and the exhaust components can pass wind.

[0008] A blower mechanism with an adjustable angle of blowing is provided inside the top cover, a through shaft that can be rotated by power passes through the upper surface of the top cover, one end of the through shaft is located inside the top cover and is connected to the blower mechanism, and a variable frequency fan mechanism with adjustable wind speed that rotates relative to the through shaft is installed on the upper end of the top cover, and the variable frequency fan mechanism supplies air into the through shaft.

[0009] Optionally, the exhaust assembly includes an exhaust cylinder and an inner gear ring. The circumferential surface of the exhaust cylinder is arranged to be air-permeable, and both ends of the exhaust cylinder are rotatably connected to the fixed ring and the upper ring respectively.

[0010] The exhaust pipe is located on one end of the upper side of the upper ring and is coaxially fixed with a small gear, which is engaged with the inner ring surface of the inner gear ring, and the inner gear ring is installed on the upper surface of the upper ring in a power-rotatable manner.

[0011] Optionally, a plurality of vertical soil transfer troughs are provided on the outer circumferential surface of the exhaust duct, soil storage recesses are provided inside the vertical soil transfer troughs, and both the vertical soil transfer troughs and the soil storage recesses are arranged in a ventilation structure.

[0012] Optionally, a partition is provided between every two adjacent exhaust ducts, and upper and lower ends of the partition are respectively fixed to the upper ring and the ground ring.

[0013] The partition is arranged in an isosceles triangle at one end close to the axis of the upper ring.

[0014] Optionally, the blower mechanism includes a track frame and a movable jet structure, the movable jet structure is slidably connected to the track frame, and the track frame is located at the axis of the top cover and is connected to the lower end of the through shaft on the upper surface.

[0015] The track frame is equipped with a power control mechanism for controlling the movement of the movable jet structure.

[0016] The track frame vents air to the interior of the moving air-jet structure.

[0017] Optionally, the movable jet structure includes an inner circular tube, an outer circular tube and a connecting tube, and the track frame is provided with a track groove with a T-shaped cross section.

[0018] The two ends of the communicating pipe are connected and installed with the inner circular pipe and the outer circular pipe respectively.

[0019] The inner circular tube is arranged in parallel with the outer circular tube, and the connecting tube is arranged perpendicular to the outer circular tube.

[0020] The inner circular tube and the connecting tube are slidably inserted in the track groove, the outer circular tube is located on the side of the track frame close to the axis of the top cover, and the connecting tube is provided with inner through holes connected to the interior on both the front and rear sides. The track groove is provided with multiple outer through holes on both the front and rear sides of the connecting tube, and a cone head is coaxially arranged on the inside of the outer through hole. The cone head is located inside the track frame at one end and is elastically connected to the track frame, and a short strip is fixedly inserted inside the inner through hole.

[0021] The outer tube is connected to and provided with a spray nozzle on one side away from the connecting tube.

[0022] Optionally, the maximum diameter of the cone head is larger than the diameter of the outer through hole, and the tip of the cone head is located outside the outer through hole.

[0023] Optionally, the power control mechanism includes a gear plate and a transmission gear, the gear plate is fixed to the track frame, the gear plate is engaged with the transmission gear on the side away from the top cover axis, and the transmission gear shaft is rotatably connected to the rear end of the inner tube.

[0024] The upper end of the track groove is in a quarter arc shape, and the lower end of the track groove is in a vertical shape tangent to the arc portion of the track groove. The shape of the tooth plate is adapted to the shape of the track groove.

[0025] A worm gear meshing mechanism for controlling the power rotation of the transmission gear is installed on the back of the jet head.

[0026] Optionally, the outer through holes located in front and behind the connecting tube are staggered along the track groove, the two inner through holes are coaxially arranged, and the distance between the two adjacent outer through holes located on both sides of the connecting tube is smaller than the diameter of the inner through hole.

[0027] In summary, the present invention has the following beneficial technical effects: The present invention arranges components such as a blower mechanism, a top cover, a fixed ground ring and an exhaust assembly so that the land to be inspected is located within the range of the fixed ground ring. The fixed ground ring, the exhaust assembly, the upper ring and the top cover separate the ground to be inspected from the external environment. Wind force is applied to the ground within the range of the fixed ground ring through the blower mechanism. The airflow of the wind drives the blown soil to adhere to the surface of the exhaust assembly. After the soil rotates to the outside with the exhaust assembly, the blown soil is transferred to the outside of the fixed ground ring. Wind erosion is caused to the ground by the self-generated wind force of the equipment, thereby reducing the influence of the external environment on wind erosion detection.

[0028] The present invention provides components such as exhaust ducts, vertical soil transfer troughs, and soil storage concave holes. When the wind blows the soil into contact with the exhaust duct, soil particles enter the vertical soil transfer troughs and soil storage concave holes, effectively preventing the attached soil particles from separating from the exhaust duct on the inner ring side of the fixed ring. At the same time, it can ensure that adjacent exhaust ducts are in close contact with the partition plate, so that the air flow can only pass through the exhaust duct. After the soil particles follow the exhaust duct to rotate on the outer ring side of the fixed ring, the air flow blown outward by the exhaust duct drives the soil particles in the outer vertical soil transfer troughs and soil storage concave holes to separate from the exhaust duct, so that the soil generated by wind erosion can be continuously transported to the outside during the rotation of the exhaust duct.

[0029] The present invention provides components such as an inner circular tube, an outer circular tube, a connecting tube, an inner through hole and an outer through hole. During the rotation of the transmission gear, the outer circular tube, the inner circular tube and the connecting tube are driven to move along the track of the track groove by engaging with the tooth plate. At the same time, the direction of the nozzle relative to the air hood is changed in the track frame around the through shaft. The position and direction of the nozzle are continuously changed during the movement of the outer circular tube. The direction of the wind blowing toward the ground can be detected, and wind erosion on the ground caused by wind from different directions can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic structural diagram of the connection between the laser detection ring and the top cover in an embodiment of the present invention; Figure 3 2. It is a schematic structural diagram of the connection between the partition plate and the grounding ring in an embodiment of the present invention; Figure 4 is a schematic top view of part of the structure in an embodiment of the present invention; Figure 5 2. It is a schematic structural diagram of the connection between the exhaust fan and the upper ring in an embodiment of the present invention; Figure 6 2 is a schematic diagram of the structure of the connection between the through shaft and the track frame in an embodiment of the present invention; Figure 7 This is a schematic structural diagram of the connection between the connecting pipe and the inner circular pipe in an embodiment of the present invention; Figure 8 is a schematic side view of part of the structure in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the short strip connected to the inner through hole in an embodiment of the present invention; Figure 10 In the embodiment of the present invention Figure 5 A magnified schematic diagram of the structure in the middle.

[0031] Figure numerals: 1. Ground ring; 2. Upper ring; 3. Top cover; 4. Exhaust mechanism; 5. Laser detection ring; 51. Exhaust assembly; 511. Exhaust tube; 5111. Vertical soil transfer trough; 5112. Soil storage recess; 512. Inner gear ring; 513. Pinion; 514. Partition; 6. Blower mechanism; 61. Track frame; 62. Mobile jet structure; 621. Inner circular tube; 622. Outer circular tube; 623. Connecting tube; 624. Track groove; 625. Inner through hole; 626. Outer through hole; 627. Cone head; 628. Short strip; 629. Jet head; 63. Power control mechanism; 631. Tooth plate; 632. Transmission gear; 633. Worm gear meshing mechanism; 7. Through shaft; 8. Variable frequency fan mechanism. DETAILED DESCRIPTION

[0032] The following is combined with Figures 1-10 The present invention is described in further detail.

[0033] The embodiment of the present invention discloses a field fixed-point measurement device for soil wind erosion. Figures 1-10 As shown, it includes a ground-fixing ring 1, an upper ring 2 is provided on the upper side of the ground-fixing ring 1, a top cover 3 is fixed on the upper surface of the upper ring 2, and a boom is installed on the upper end of the top cover 3 so that transportation equipment such as a transport vehicle can be connected for transportation. The upper ring 2 and the ground-fixing ring 1 are connected by a ventilated exhaust mechanism 4, and a laser detection ring 5 is installed inside the top cover 3. The laser detection ring 5 can detect changes in the ground soil height.

[0034] The exhaust mechanism 4 includes a plurality of powered rotatable exhaust components 51 , both ends of which are rotatably connected to the upper ring 2 and the ground ring 1 respectively. The exhaust components 51 can pass wind, and the wind can pass through the exhaust components 51 .

[0035] The exhaust assembly 51 includes an exhaust tube 511 and an inner gear ring 512. The circumferential surface of the exhaust tube 511 is arranged to be air-permeable. The outer circumferential surface of the exhaust tube 511 is provided with multiple vertical soil transfer troughs 5111. The vertical soil transfer troughs 5111 are provided with soil storage recesses 5112. The vertical soil transfer troughs 5111 and the soil storage recesses 5112 are both arranged to be air-permeable. When the wind drives the soil particles into the vertical soil transfer troughs 5111 and the soil storage recesses 5112, the soil particles remain in the vertical soil transfer troughs 5111 and the soil storage recesses 5112. After entering the exhaust tube 511, the wind is discharged from the outside of the exhaust tube 511. The two ends of the exhaust tube 511 are respectively rotatably connected to the fixed ring 1 and the upper ring 2.

[0036] A partition 514 is provided between each adjacent exhaust ducts 511. The upper and lower ends of the partition 514 are respectively fixed to the upper ring 2 and the fixed ground ring 1. The partition 514 is arranged in an isosceles triangle at one end close to the axis of the upper ring 2. The partition 514 separates the two adjacent exhaust ducts 511. The wind enters the inner side of the exhaust duct 511 through the part of the exhaust duct 511 located on the inner side of the partition 514, and is then blown out from the part of the exhaust duct 511 located on the outer side of the partition 514. After the wind contacts the isosceles triangle part of the partition 514, it is diverted to the exhaust ducts 511 on both sides, so that the wind enters the exhaust duct 511.

[0037] The exhaust duct 511 is located at one end of the upper side of the upper ring 2 and is coaxially fixed with a pinion 513. The pinion 513 is meshed with the inner ring surface of the inner gear ring 512. The inner gear ring 512 can be rotatably installed on the upper surface of the upper ring 2. The upper ring 2 is installed with a motor, and a driving gear meshed with the inner gear ring 512 is installed at the output end of the motor. The motor drives the pinion 513 to rotate through the engagement of the driving gear with the inner gear ring 512, so that the exhaust duct 511 rotates, and the vertical soil transfer trough 5111 and the soil storage concave hole 5112 filled with soil particles follow the exhaust duct 511 to rotate to the outside, and then the air flow blown out from the inside of the exhaust duct 511 blows the soil particles out of the vertical soil transfer trough 5111 and the soil storage concave hole 5112.

[0038] A hair dryer mechanism 6 with adjustable blowing angle is provided inside the top cover 3. A through shaft 7 that can be rotated by power passes through the upper surface of the top cover 3. A motor is installed on the upper end of the top cover 3. The output end of the motor and the upper end of the through shaft 7 are meshed with gears. The motor controls the rotation of the through shaft 7 through gear meshing. The through shaft 7 is located at one end inside the top cover 3 and is connected to the hair dryer mechanism 6.

[0039] The blower mechanism 6 includes a track frame 61 and a movable jet structure 62 . The movable jet structure 62 is slidably connected to the track frame 61 . The track frame 61 is located on the axis of the top cover 3 and is connected to the lower end of the through shaft 7 .

[0040] The track frame 61 is equipped with a power control mechanism 63 for controlling the movement of the movable jet structure 62 .

[0041] The track frame 61 vents air to the interior of the moving air-jet structure 62 .

[0042] A variable frequency fan mechanism 8 with adjustable wind speed that rotates relative to the through shaft 7 is installed on the upper end of the top cover 3 , and the variable frequency fan mechanism 8 supplies air into the through shaft 7 .

[0043] The movable jet structure 62 includes an inner circular tube 621 , an outer circular tube 622 and a connecting tube 623 . The track frame 61 is provided with a track groove 624 with a T-shaped cross section.

[0044] Both ends of the connecting pipe 623 are connected to the inner circular pipe 621 and the outer circular pipe 622 respectively.

[0045] The inner circular tube 621 is arranged parallel to the outer circular tube 622 , and the connecting tube 623 is arranged perpendicular to the outer circular tube 622 .

[0046] The inner circular tube 621 and the connecting tube 623 are slidably inserted in the track groove 624, the outer circular tube 622 is located on the side of the track frame 61 close to the axis of the top cover 3, and the connecting tube 623 is provided with an inner through hole 625 connected to the interior on both the front and rear sides. The track groove 624 is located on the front and rear sides of the connecting tube 623 and is provided with multiple outer through holes 626. A cone head 627 is coaxially arranged on the inner side of the outer through hole 626. The cone head 627 is located at one end inside the track frame 61 and is elastically connected to the track frame 61. The elastic connection between the cone head 627 and the track frame 61 has a tendency to block the outer through hole 626. The maximum diameter of the cone head 627 is larger than the diameter of the outer through hole 626, so that the cone head 627 can block the outer through hole 626. The tip of the cone head 627 is located outside the outer through hole 626, and the inner through hole 625 is fixed inside. A short strip 628 is fixedly connected. When the connecting tube 623 moves, it can drive the short strips 628 on both sides to contact different cone heads 627 in turn, pushing the contact cone heads 627 into the track frame 61, so that the airflow in the track frame 61 can enter the inner through hole 625 through the gap between the outer through hole 626 and the cone head 627. The outer through holes 626 located before and after the connecting tube 623 are staggered along the track groove 624. The two inner through holes 625 are coaxially arranged. The distance between the two adjacent outer through holes 626 located on both sides of the connecting tube 623 is less than the diameter of the inner through hole 625. When the connecting tube 623 moves, at least one inner through hole 625 is connected to one outer through hole 626, ensuring that the airflow in the track frame 61 can always enter the connecting tube 623 without disconnection.

[0047] The outer tube 622 is connected to a nozzle 629 on the side away from the connecting tube 623 . The airflow of the connecting tube 623 is ejected from the nozzle 629 through the outer tube 622 to cause wind erosion on the ground.

[0048] The power control mechanism 63 includes a tooth plate 631 and a transmission gear 632. The tooth plate 631 is fixed to the track frame 61. The tooth plate 631 is engaged with the transmission gear 632 on the side away from the axis of the top cover 3. The shaft of the transmission gear 632 is rotatably connected to the rear end of the inner tube 621. The upper end of the track groove 624 is in the shape of a quarter arc, and the lower end of the track groove 624 is in a vertical shape tangent to the arc part of the track groove 624. The shape of the tooth plate 631 is adapted to the shape of the track groove 624. When the transmission gear 632 rotates to the lower end of the arc end of the tooth plate 631, it can move to the vertical part tangent to the tooth plate 631, driving the inner tube 621 and the connecting tube 623 to move in the track groove 624.

[0049] A worm gear meshing mechanism 633 for controlling the power rotation of the transmission gear 632 is installed on the back of the nozzle head 629 , and a motor for outputting power to the worm gear meshing mechanism 633 is installed on the nozzle head 629 .

[0050] The working principle is as follows: the device is moved to the location to be inspected by means of transportation equipment, so that the land to be inspected is located within the range of the fixed ring 1. The fixed ring 1, the exhaust assembly 51, the upper ring 2 and the top cover 3 separate the ground to be inspected from the external environment. Wind force is applied to the ground within the range of the fixed ring 1 through the blower mechanism 6. At the same time, the through shaft 7 can drive the blower mechanism 6 to rotate around the axis of the top cover 3. The wind erodes the ground by contacting with the ground, and then the wind is discharged through the exhaust mechanism 4. The airflow of the wind drives the blown soil to adhere to the surface of the exhaust assembly 51. Then, after the soil rotates to the outside with the exhaust assembly 51, the blown soil is transferred to the outside of the fixed ring 1. The wind force generated by the equipment itself causes wind erosion on the ground, thereby reducing the influence of the external environment on wind erosion detection.

[0051] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A soil wind erosion field fixed-point measurement device, comprising a fixed-point ring (1), characterized in that: An upper ring (2) is provided on the upper side of the ground-fixing ring (1), a top cover (3) is fixed on the upper surface of the upper ring (2), the upper ring (2) and the ground-fixing ring (1) are connected via a ventilated exhaust mechanism (4), and a laser detection ring (5) is installed inside the top cover (3); The exhaust mechanism (4) includes a plurality of powered rotatable exhaust components (51), the two ends of the exhaust components (51) being rotatably connected to the upper ring (2) and the ground ring (1), respectively, and the exhaust components (51) can pass wind; The top cover (3) is provided with a blower mechanism (6) with an adjustable blowing angle, and a through shaft (7) that can be rotated by power is passed through the upper surface of the top cover (3). The through shaft (7) is located inside the top cover (3) and is connected to the blower mechanism (6) at one end. The top cover (3) is provided with a variable frequency fan mechanism (8) with an adjustable wind speed that rotates relative to the through shaft (7). The variable frequency fan mechanism (8) supplies air into the through shaft (7).

2. The soil wind erosion field fixed-point measurement device according to claim 1, characterized in that: The exhaust assembly (51) includes an exhaust tube (511) and an inner gear ring (512). The circumferential surface of the exhaust tube (511) is arranged to be air-permeable. The two ends of the exhaust tube (511) are rotatably connected to the fixed ring (1) and the upper ring (2) respectively. The exhaust pipe (511) is located on one end of the upper side of the upper ring (2), and a small gear (513) is coaxially fixed thereto. The small gear (513) is engaged with the inner ring surface of the inner gear ring (512), and the inner gear ring (512) is mounted on the upper surface of the upper ring (2) in a manner that allows for dynamic rotation.

3. The soil wind erosion field fixed-point measurement device according to claim 2, characterized in that: The outer circumferential surface of the exhaust tube (511) is provided with a plurality of vertical soil transfer grooves (5111), and soil storage recessed holes (5112) are provided inside the vertical soil transfer grooves (5111). Both the vertical soil transfer grooves (5111) and the soil storage recessed holes (5112) are arranged in a ventilation structure.

4. A soil wind erosion field fixed-point measurement device according to claim 2 or 3, characterized in that: A partition plate (514) is provided between each two adjacent exhaust ducts (511), and the upper and lower ends of the partition plate (514) are respectively fixed to the upper ring (2) and the ground ring (1); The partition (514) is arranged in the form of an isosceles triangle at one end close to the axis of the upper ring (2).

5. The soil wind erosion field fixed-point measurement device according to claim 1, characterized in that: The blower mechanism (6) comprises a track frame (61) and a movable jet structure (62), wherein the movable jet structure (62) is slidably connected to the track frame (61), and the track frame (61) is located on the axis of the top cover (3) and is connected to the lower end of the through shaft (7). The track frame (61) is equipped with a power control mechanism (63) for controlling the movement of the movable jet structure (62); The track frame (61) ventilates the interior of the mobile jet structure (62).

6. The soil wind erosion field fixed-point measurement device according to claim 5, characterized in that: The mobile jet structure (62) includes an inner circular tube (621), an outer circular tube (622) and a connecting tube (623), and the track frame (61) is provided with a track groove (624) with a T-shaped cross section; The two ends of the connecting pipe (623) are connected and installed with the inner circular pipe (621) and the outer circular pipe (622) respectively; The inner circular tube (621) and the outer circular tube (622) are arranged in parallel, and the connecting tube (623) and the outer circular tube (622) are arranged perpendicularly; The inner circular tube (621) and the connecting tube (623) are slidably plugged into the track groove (624); the outer circular tube (622) is located on the track frame (61) near the axis of the top cover (3); the connecting tube (623) is provided with inner through holes (625) communicating with the interior on both the front and rear sides; the track groove (624) is provided with a plurality of outer through holes (626) on both the front and rear sides of the connecting tube (623); a cone head (627) is coaxially provided on the inner side of the outer through hole (626); one end of the cone head (627) is located inside the track frame (61) and is elastically connected to the track frame (61); a short strip (628) is fixedly plugged into the inner through hole (625); The outer tube (622) is connected to a nozzle (629) on a side away from the connecting tube (623).

7. The soil wind erosion field fixed-point measurement device according to claim 6, characterized in that: The maximum diameter of the cone head (627) is greater than the diameter of the outer through hole (626), and the tip of the cone head (627) is located outside the outer through hole (626).

8. The soil wind erosion field fixed-point measurement device according to claim 6, characterized in that: The power control mechanism (63) includes a tooth plate (631) and a transmission gear (632), the tooth plate (631) is fixed to the track frame (61), the tooth plate (631) is meshed with the transmission gear (632) on the side away from the axis of the top cover (3), and the shaft of the transmission gear (632) is rotatably connected to the rear end of the inner tube (621); The upper end of the track groove (624) is in the shape of a quarter arc, the lower end of the track groove (624) is in a vertical shape tangent to the arc portion of the track groove (624), and the shape of the tooth plate (631) is adapted to the shape of the track groove (624); A worm gear engagement mechanism (633) for controlling the power rotation of the transmission gear (632) is installed on the back of the jet head (629).

9. The soil wind erosion field fixed-point measurement device according to claim 6, characterized in that: The outer through holes (626) located in front and behind the connecting tube (623) are staggered along the track groove (624), the two inner through holes (625) are coaxially arranged, and the distance between the two adjacent outer through holes (626) located on both sides of the connecting tube (623) is smaller than the diameter of the inner through hole (625).

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