Soil water content detection equipment for geological investigation of water conservancy project

Abstract

The invention discloses soil water content detection equipment for hydraulic engineering geological investigation, and relates to the technical field of soil water content detection.The soil water content detection equipment comprises a mounting base, a weighing device is connected to the top of the mounting base, a mounting cylinder is detachably connected to the upper portion of the weighing device through screws, and a fixing frame is connected to the top of the mounting base; an air heater is connected into the fixing frame, a connecting filter cylinder is arranged in the mounting cylinder in a sliding mode, and a crushing part is rotationally connected into the connecting filter cylinder; the crushing part is driven by the servo motor to rotate forwards and backwards, a connecting convex block and an abutting convex block are matched to enable a connecting filter cylinder to vertically slide, all-directional crushing and vibration dispersion of soil are achieved, soil accumulation and caking are effectively avoided, hot air can make full contact with all parts of the soil, and the soil crushing efficiency is improved. The problem that in traditional equipment, the outside of soil is dried, and water remains in the soil is solved, it is ensured that soil is evenly dried, and the accuracy of soil water content detection results is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil moisture content detection, in particular to soil moisture content detection equipment for geological survey of water conservancy projects. Background Art

[0002] Soil moisture content is one of the key parameters characterizing soil properties, playing an important role in agriculture, hydrology, environment, meteorology, and other fields. Therefore, timely and accurate soil moisture information is crucial. The drying and weighing method is commonly used to measure soil moisture content. This method involves weighing the soil to be tested, then continuously passing a stream of hot air through the soil to remove water molecules, drying the soil. The dried soil is then weighed a second time. The difference between these two weighings represents the soil moisture content.

[0003] An existing Chinese patent (publication number: CN116359475B) discloses a soil moisture detection instrument, which relates to the field of moisture content detection technology, including a base plate, and also includes: a mounting column arranged on the base plate, a bracket rod is arranged on the top of the mounting column; a detection mechanism arranged on one side of the bracket rod, including a drying cylinder, a drying component is arranged on the drying cylinder, a material barrel is arranged on one side of the drying component, and a vent hole is opened on the side wall of the material barrel, a rotating column is arranged on the top of the drying cylinder, a transmission column is movably arranged at one end of the mounting rod away from the rotating column, the bottom end of the transmission column is connected to the material barrel, a trigger rod is arranged on the movable assembly, a trapezoidal block is fixedly connected to the bottom of the fixed frame, the trapezoidal block and the trigger rod are arranged correspondingly, a limit assembly is arranged between the fixed frame and the bearing rod, a limit block is provided on the side of the indicator rod away from the fixed frame, an air supply pump is arranged on the bearing rod on one side of the limit block, the air outlet end of the air supply pump is connected to the air guide cylinder, a valve assembly is provided on the air guide cylinder, the end of the air guide cylinder is connected to the storage cylinder, and an active signal assembly is provided in the storage cylinder.

[0004] During use of the above-mentioned equipment, hot air is introduced into one side of the drying cylinder through a hot air blower, thereby quickly drying the soil in the drying cylinder and comparing the weight with the weight before drying to obtain the moisture content of the soil. However, during use of the device, since the soil is rich in moisture, the soil is easily piled up and stuck together, and the contact area between the hot air and the soil is limited. For lumpy soil, the outer soil may have been dried, but the inner soil still contains a certain amount of moisture that cannot be dried, which can easily affect the detection results of the soil moisture content.

[0005] To this end, we designed a soil moisture detection equipment for water conservancy engineering geological survey to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a soil moisture content detection device for water conservancy engineering geological survey to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides a soil moisture detection equipment for geological survey of water conservancy projects, including a mounting base, the top of the mounting base is connected with a weighing device, the top of the weighing device is detachably connected to a mounting cylinder by screws, the top of the mounting base is connected with a fixing frame, a hot air blower is connected in the fixing frame, a connecting filter cartridge is slidingly arranged in the mounting cylinder, a crushing piece is rotatably connected in the connecting filter cartridge, a mounting plate is connected to the crushing piece, at least two connecting protrusions are connected to the bottom of the mounting plate, a interference protrusion is provided on the top of the connecting filter cartridge, a driving assembly for driving the crushing piece to rotate is provided above the mounting base, wherein when the crushing piece rotates, the driving connecting protrusion rotates and conflicts with the interference protrusion, causing the connecting filter cartridge to slide vertically along the axis direction of the mounting cylinder, and a buffer assembly for driving the connecting filter cartridge to reset is provided at the bottom of the connecting filter cartridge.

[0008] Furthermore, the buffer assembly is divided into two groups, which are symmetrically arranged at the bottom of the filter cartridge. The buffer assembly includes two transmission plates rotatably connected to the bottom of the filter cartridge. The other end of the transmission plate is rotatably connected to a sliding seat. The sliding seat is slidably connected in the mounting cylinder. A guide telescopic rod is connected between the two sliding seats. A first return spring is sleeved on the guide telescopic rod. The two ends of the first return spring are respectively connected to the opposite sides of the two sliding seats.

[0009] Furthermore, the drive assembly includes a servo motor connected to the top of the fixed frame, the driving end of the servo motor is connected to a missing gear through a coupling key, one side of the missing gear is meshed with a transmission gear, and the transmission gear is coaxially arranged with the crushing part.

[0010] Furthermore, the number of the mounting cylinders and transmission gears is at least four, and they are evenly spaced in a circular array with the center of the mounting base as the center. One end of the crushing member passes through the filter cylinder and is rotatably connected to the mounting cylinder. One end of the crushing member is connected to a coil spring through a key slot. A flat key matching the key slot is provided on the inner ring of the coil spring. The outer ring of the coil spring is connected to the mounting cylinder. When the missing gear is engaged with the transmission gear, the crushing member drives the coil spring to reel. When the missing gear is not engaged with the transmission gear, the coil spring releases the elastic force to drive the crushing member to rotate in the opposite direction.

[0011] Furthermore, a mounting sleeve is provided on the top of the connecting filter cartridge, the interference protrusion is slidably connected to the mounting sleeve, a limiting pin for limiting the interference protrusion is inserted on the mounting sleeve, and the interference protrusion is provided with a plurality of limiting holes distributed at equal intervals along the length direction of the interference protrusion.

[0012] Furthermore, a plurality of fixing sleeves are connected to the top of the connecting filter cartridge, and the plurality of fixing sleeves are distributed at equal intervals in a circular array with the center of the connecting filter cartridge as the center, and the installation sleeve is plugged into the fixing sleeve.

[0013] Furthermore, an installation cavity is opened in the installation sleeve, a second return spring is connected to the installation cavity, the other end of the second return spring is connected to a slide, the other side of the slide is connected to a limiting column, and the limiting column extends to the outside of the installation sleeve and is inserted into the fixed sleeve.

[0014] Furthermore, a diverter plate is connected to the fixed frame, and the diverter plate is interconnected with the air outlet end of the hot air blower through a mounting tube. A plurality of air supply pipes are connected to the diverter plate, and the other end of the air supply pipe extends to the outside of the fixed frame and is connected to a nozzle, and the nozzle is connected to the connecting filter cartridge. A connecting frame is connected to the fixed frame, and the hot air blower is connected to the connecting frame. A drying plate is connected to the fixed frame, and the drying plate is located above the air inlet of the hot air blower.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The servo motor drives the crushing parts to rotate forward and reverse, and cooperates with the connecting protrusions and the resistance protrusions to make the connecting filter cartridge slide vertically, realizing all-round crushing and vibration dispersion of the soil. This setting effectively avoids soil accumulation and agglomeration, allowing hot air to fully contact all parts of the soil, solving the problem of traditional equipment in which the soil is dried on the outside but moisture remains inside, ensuring uniform soil drying and improving the accuracy of soil moisture content test results.

[0017] 2. The interference protrusion can be adjusted on the installation sleeve. Combined with the plug-in setting of the installation sleeve and the fixed sleeve, the sliding distance of the connecting filter cartridge can be adjusted according to the characteristics of soil with different viscosity and humidity, so that the device can crush and disperse both highly viscous soil and loose soil. At the same time, the hot air blower cooperates with the drying plate to ensure drying efficiency and enhance the versatility of the equipment under different conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the present invention;

[0020] Figure 3 is a side view of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 For the present invention Figure 2 Enlarged view of point B in the middle;

[0023] Figure 6 For the present invention Figure 1 Enlarged view of point C in the middle;

[0024] Figure 7 For the present invention Figure 2 Enlarged view of point D in the middle.

[0025] In the figure: 1. Mounting base; 2. Weighing device; 3. Mounting cylinder; 4. Fixing frame; 5. Hot air blower; 6. Connecting filter cartridge; 7. Crushing part; 8. Mounting plate; 9. Connecting protrusion; 10. Interference protrusion; 11. Transmission plate; 12. Sliding seat; 13. Guide telescopic rod; 14. First return spring; 15. Servo motor; 16. Missing gear; 17. Transmission gear; 18. Coil spring; 19. Mounting sleeve; 20. Limit pin; 21. Limit hole; 22. Fixing sleeve; 23. Second return spring; 24. Slide plate; 25. Limit column; 26. Diverter plate; 27. Air pipe; 28. Nozzle; 29. ​​Drying plate; 30. Connecting frame. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-7 The present invention provides a technical solution: a soil moisture content detection equipment for geological survey of water conservancy projects, comprising a mounting base 1, a weighing device 2 is connected to the top of the mounting base 1, a mounting cylinder 3 is detachably connected to the top of the weighing device 2 by screws, a fixing frame 4 is connected to the top of the fixing frame 4, a hot air blower 5 is connected to the fixing frame 4, a connecting filter cartridge 6 is slidingly arranged in the mounting cylinder 3, a crushing member 7 is rotatably connected in the connecting filter cartridge 6, a mounting plate 8 is connected to the crushing member 7, at least two connecting protrusions 9 are connected to the bottom of the mounting plate 8, a conflicting protrusion 10 is provided on the top of the connecting filter cartridge 6, a driving assembly for driving the crushing member 7 to rotate is provided above the mounting base 1, wherein when the crushing member 7 rotates, the driving connecting protrusion 9 rotates and conflicts with the conflicting protrusion 10, so that the connecting filter cartridge 6 slides vertically along the axial direction of the mounting cylinder 3, and a buffer assembly for driving the connecting filter cartridge 6 to reset is provided at the bottom of the connecting filter cartridge 6.

[0028] It should be noted that the crushing member 7 is composed of a transmission shaft and a plurality of crushing blades.

[0029] During specific implementation, when the driving assembly drives the crushing piece 7 to rotate, the connecting protrusion 9 rotates accordingly and conflicts with the interfering protrusion 10, thereby pushing the connecting filter cartridge 6 to slide vertically along the axial direction of the mounting cylinder 3, and causing an up and down vibration effect on the soil placed in the connecting filter cartridge 6. During this process, the crushing piece 7 crushes the soil in the connecting filter cartridge 6. At the same time, the up and down sliding of the connecting filter cartridge 6 enables the soil to better contact with the crushing piece 7, thereby improving the crushing effect and allowing the soil to be fully dispersed. In addition, the contact area between the soil and the hot air is also increased during the up and down sliding process of the soil, further improving the drying efficiency.

[0030] See Figure 1-7 The buffer assembly is divided into two groups, which are symmetrically arranged at the bottom of the filter cartridge 6. The buffer assembly includes two transmission plates 11 rotatably connected to the bottom of the filter cartridge 6. The other end of the transmission plate 11 is rotatably connected to a sliding seat 12. The sliding seat 12 is slidably connected in the mounting tube 3. A guide telescopic rod 13 is connected between the two sliding seats 12. A first return spring 14 is sleeved on the guide telescopic rod 13. The two ends of the first return spring 14 are respectively connected to the opposite sides of the two sliding seats 12.

[0031] It should be noted that the guide telescopic rod 13 is composed of a connecting tube and a telescopic column, which can provide limiting and guiding effects for the sliding seat 12.

[0032] In specific implementation, when the connecting filter cartridge 6 slides vertically driven by the crushing member 7, the transmission plate 11 rotates, driving the sliding seat 12 to slide in the mounting cylinder 3, and the guide telescopic rod 13 and the first return spring 14 cooperate with each other to buffer and reset the sliding of the connecting filter cartridge 6, ensuring that the connecting filter cartridge 6 can stably perform up and down reciprocating motion.

[0033] See Figure 1-7 The driving assembly includes a servo motor 15 connected to the top of the fixed frame 4. The driving end of the servo motor 15 is connected to a missing gear 16 through a coupling key. One side of the missing gear 16 is meshed with a transmission gear 17. The transmission gear 17 is coaxially arranged with the crushing member 7.

[0034] During specific implementation, the servo motor 15 is started and drives the missing gear 16 to rotate through the coupling. When the missing gear 16 engages with the transmission gear 17, the power is transmitted to the transmission gear 17, which in turn drives the crushing member 7 coaxially arranged with the transmission gear 17 to rotate, thereby crushing the soil.

[0035] See Figure 1-7The number of mounting cylinders 3 and transmission gears 17 is at least four, and they are evenly spaced in a circular array with the center of the mounting base 1 as the center. One end of the crushing member 7 penetrates the filter cartridge 6 and is rotatably connected to the mounting cylinder 3. One end of the crushing member 7 is connected to a coil spring 18 through a keyway. A flat key that matches the keyway is provided on the inner ring of the coil spring 18. The outer ring of the coil spring 18 is connected to the mounting cylinder 3. When the missing gear 16 is engaged with the transmission gear 17, the crushing member 7 drives the coil spring 18 to reel. When the missing gear 16 is not engaged with the transmission gear 17, the coil spring 18 releases the elastic force and drives the crushing member 7 to rotate in the opposite direction.

[0036] It should be noted that the diameter of the missing gear 16 is larger than that of the transmission gear 17, and the part with gear teeth in the missing gear 16 is much larger than the part without gear teeth. When the part with gear teeth in the missing gear 16 is engaged with the transmission gear 17, the coil spring 18 can be wound multiple times to ensure the driving force when it rotates in the opposite direction.

[0037] During specific implementation, when the missing gear 16 is engaged with the transmission gear 17, the crushing member 7 rotates to drive the coil spring 18 to reel in; when the missing gear 16 is not engaged with the transmission gear 17, the coil spring 18 releases the elastic force and drives the crushing member 7 to rotate in the opposite direction. In this setting, the forward and reverse rotation of the crushing member 7 can crush the soil more comprehensively, making the soil particles smaller and more evenly dispersed, increasing the contact area between the hot air and the soil, and further improving the uniformity of soil drying.

[0038] See Figure 1-7 A mounting sleeve 19 is provided at the top of the filter cartridge 6, and the interference protrusion 10 is slidably connected to the mounting sleeve 19. A limiting pin 20 for limiting the interference protrusion 10 is inserted on the mounting sleeve 19, and a plurality of limiting holes 21 are distributed at equal intervals along the length direction of the interference protrusion 10.

[0039] During specific implementation, the interference protrusion 10 can be slidably adjusted on the mounting sleeve 19, and the position of the interference protrusion 10 is fixed by cooperating with the limiting pin 20 and the limiting holes 21 at different positions on the interference protrusion 10. When the crushing part 7 rotates, the connecting protrusion 9 conflicts with the interference protrusion 10. The different positions of the interference protrusion 10 will change the vertical sliding stroke of the connecting filter cartridge 6 along the axial direction of the mounting cylinder 3. The above-mentioned adjustment method can enable the equipment to adjust the sliding distance of the connecting filter cartridge 6 according to the viscosity, humidity and other characteristics of different soils. For soils with high viscosity and easy to clump, the sliding distance can be increased to enhance the crushing and dispersion effects; for relatively loose soils, the distance can be reduced.

[0040] See Figure 1-7 The top of the connecting filter cartridge 6 is connected to a plurality of fixed sleeves 22 , and the plurality of fixed sleeves 22 are distributed in a circular array with equal spacing around the center of the connecting filter cartridge 6 , and the mounting sleeve 19 is plugged into the fixed sleeve 22 .

[0041] During specific implementation, the fixed sleeve 22 can fix the installation sleeve 19. Correspondingly, since multiple fixed sleeves 22 are provided, the sliding distance of the connecting filter cartridge 6 can be further adjusted by adjusting the number of installed sleeves 19 plugged in.

[0042] See Figure 1-7 An installation cavity is opened in the installation sleeve 19, and a second return spring 23 is connected to the installation cavity. The other end of the second return spring 23 is connected to a slide plate 24, and the other side of the slide plate 24 is connected to a limiting column 25. The limiting column 25 extends to the outside of the installation sleeve 19 and is inserted into the fixed sleeve 22.

[0043] In specific implementation, when the mounting sleeve 19 is inserted into the fixed sleeve 22, the limiting column 25 extends to the outside of the mounting sleeve 19 and is inserted into the fixed sleeve 22 under the action of the elastic force of the second return spring 23, thereby fixing the mounting sleeve 19 and the connecting filter cartridge 6; when disassembly is required, the limiting column 25 is pressed to overcome the elastic force of the second return spring 23, so that the limiting column 25 is retracted into the mounting sleeve 19, and separation is achieved.

[0044] See Figure 1-7 A diverter plate 26 is connected to the fixed frame 4, and the diverter plate 26 is connected to the air outlet end of the hot air blower 5 through the mounting pipe. A plurality of air supply pipes 27 are connected to the diverter plate 26. The other end of the air supply pipe 27 extends to the outside of the fixed frame 4 and is connected to a nozzle 28. The nozzle 28 is connected to the connecting filter cartridge 6. A connecting frame 30 is connected to the fixed frame 4, and the hot air blower 5 is connected to the connecting frame 30. A drying plate 29 is connected to the fixed frame 4, and the drying plate 29 is located above the air inlet of the hot air blower 5.

[0045] During specific implementation, the hot air generated by the hot air blower 5 enters the diversion plate 26 through the installation pipe, and is evenly blown to the soil in the connected filter cartridge 6 through the air supply pipe 27 and the nozzle 28; the drying plate 29 dries the air entering the hot air blower 5 to ensure the dryness of the hot air.

[0046] Working principle: The servo motor 15 drives the missing gear 16 to rotate through the coupling. When the part with the gear teeth of the missing gear 16 meshes with the transmission gear 17, the transmission gear 17 is driven to rotate. Since the transmission gear 17 is coaxially arranged with the crushing part 7, the crushing part 7 immediately starts to rotate. The crushing part 7 is composed of a transmission shaft and a plurality of crushing blades. During the rotation, the crushing blades preliminarily crush the soil placed in the connecting filter cartridge 6; at the same time, the mounting plate 8 installed on the transmission shaft of the crushing part 7 rotates with the crushing part 7, and the connecting protrusion 9 at the bottom of the mounting plate 8 also rotates accordingly, and conflicts with the interference protrusion 10 at the top of the connecting filter cartridge 6. This interference action pushes the connecting filter cartridge 6 to slide vertically along the axis direction of the mounting cylinder 3, causing the soil to vibrate up and down, which not only helps the crushing part 7 to crush the soil more fully, but also allows the soil to better contact with the crushing part 7 during the sliding process, thereby improving the crushing effect and fully dispersing the soil particles;

[0047] When the connecting filter cartridge 6 slides vertically, the transmission plate 11 rotates with the sliding of the connecting filter cartridge 6, driving the sliding seat 12 to slide in the mounting cylinder 3. The guide telescopic rod 13 provides a limit and guide for the sliding seat 12 to prevent it from deflecting. At the same time, the first return spring 14 acts as a buffer for the sliding of the sliding seat 12 and provides a return elastic force after the sliding is completed, ensuring that the connecting filter cartridge 6 can stably perform an up and down reciprocating motion.

[0048] When the missing gear 16 is not engaged with the transmission gear 17, the crushing element 7 rotates in the opposite direction under the action of the coil spring 18. Since the diameter of the missing gear 16 is larger than that of the transmission gear 17 and the gear teeth are longer, the coil spring 18 has been wound several times when it was previously engaged. At this time, the elastic force is released to drive the crushing element 7 to rotate in the opposite direction, further crushing the soil, making the soil particles finer and more uniform, and increasing the contact area between the soil and the hot air.

[0049] During the soil crushing and dispersion process, the hot air generated by the hot air blower 5 enters the diverter plate 26 through the installation pipe. The diverter plate 26 evenly distributes the hot air to multiple air pipes 27. The hot air is then evenly blown onto the soil inside the connecting filter cartridge 6 through the nozzle 28 connected to the connecting filter cartridge 6. At the same time, the drying plate 29 located above the air inlet of the hot air blower 5 dries the air entering the hot air blower 5, ensuring that the hot air blown out has a high degree of dryness, thereby improving the soil drying efficiency.

[0050] In addition, the interference protrusion 10 can be slidably adjusted on the mounting sleeve 19, and the position is fixed by the limit pin 20 cooperating with different limit holes 21. When the crushing part 7 rotates, the interference protrusions 10 in different positions will change the vertical sliding stroke of the connecting filter cartridge 6. The sliding distance of the connecting filter cartridge 6 can be further adjusted by adjusting the number of mounting sleeves 19 inserted in the fixed sleeve 22, so as to adapt to soils with different viscosities and humidity and optimize the crushing and dispersion effects.

[0051] Finally, after the soil is fully crushed, dispersed and dried, the soil before and after drying is weighed by the weighing device 2. The soil moisture content is calculated based on the difference between the two weighings, completing the entire soil moisture content detection work.

Claims

1. A soil moisture detection device for water conservancy engineering geological survey, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is connected to a weighing device (2), and the top of the weighing device (2) is detachably connected to a mounting cylinder (3) by screws. The top of the mounting base (1) is connected to a fixing frame (4), and a hot air blower (5) is connected inside the fixing frame (4). A connecting filter cartridge (6) is slidingly provided inside the mounting cylinder (3), and a crushing member (7) is rotatably connected inside the connecting filter cartridge (6). A mounting plate (8) is connected to the crushing member (7), and the bottom of the mounting plate (8) is connected to at least two connecting protrusions (9). The top of the connecting filter cartridge (6) is provided with a resisting protrusion (10). A driving component for driving the crushing member (7) to rotate is provided above the mounting base (1), wherein: When the crushing member (7) rotates, the driving connecting protrusion (9) rotates and contacts the interfering protrusion (10), causing the connecting filter cartridge (6) to slide vertically along the axis of the mounting cylinder (3). A buffer assembly for driving the connecting filter cartridge (6) to reset is provided at the bottom of the connecting filter cartridge (6).

2. The soil moisture detection device for water conservancy engineering geological survey according to claim 1, characterized in that: The buffer assembly is composed of two groups, which are symmetrically arranged at the bottom of the connecting filter cartridge (6). The buffer assembly includes two transmission plates (11) rotatably connected to the bottom of the connecting filter cartridge (6). The other end of the transmission plate (11) is rotatably connected to a sliding seat (12). The sliding seat (12) is slidably connected in the installation cylinder (3). A guide telescopic rod (13) is connected between the two sliding seats (12). A first return spring (14) is sleeved on the guide telescopic rod (13). The two ends of the first return spring (14) are respectively connected to the opposite sides of the two sliding seats (12).

3. The soil moisture content detection device for water conservancy engineering geological survey according to claim 1, characterized in that: The driving assembly comprises a servo motor (15) connected to the top of the fixed frame (4); a driving end of the servo motor (15) is connected to a missing gear (16) via a coupling key; one side of the missing gear (16) is meshedly connected to a transmission gear (17); and the transmission gear (17) is coaxially arranged with the crushing member (7).

4. The soil moisture detection device for water conservancy engineering geological survey according to claim 3, characterized in that: The number of the mounting cylinder (3) and the transmission gear (17) is at least four, and they are evenly spaced and arranged in a circular array with the center of the mounting base (1) as the center. One end of the crushing member (7) penetrates the filter cylinder (6) and is rotatably connected to the mounting cylinder (3). One end of the crushing member (7) is connected to a coil spring (18) through a keyway. A flat key that matches the keyway is provided on the inner ring of the coil spring (18). The outer ring of the coil spring (18) is connected to the inside of the mounting cylinder (3). When the missing gear (16) is engaged with the transmission gear (17), the crushing member (7) drives the coil spring (18) to reel; when the missing gear (16) is not engaged with the transmission gear (17), the coil spring (18) releases its elastic force and drives the crushing member (7) to rotate in the opposite direction.

5. The soil moisture detection device for water conservancy engineering geological survey according to claim 1, characterized in that: A mounting sleeve (19) is provided on the top of the connecting filter cartridge (6), the abutting protrusion (10) is slidably connected to the mounting sleeve (19), a limiting pin (20) for limiting the position of the abutting protrusion (10) is inserted into the mounting sleeve (19), and a plurality of limiting holes (21) are provided on the abutting protrusion (10) and are distributed at equal intervals along the length direction of the abutting protrusion (10).

6. The soil moisture content detection device for water conservancy engineering geological survey according to claim 5, characterized in that: The top of the connecting filter cartridge (6) is connected to a plurality of fixed sleeves (22), which are distributed in a circular array with equal spacing around the center of the connecting filter cartridge (6), and the mounting sleeve (19) is plugged into the fixed sleeve (22).

7. The soil moisture detection device for water conservancy engineering geological survey according to claim 5, characterized in that: A mounting cavity is provided in the mounting sleeve (19), a second return spring (23) is connected to the mounting cavity, the other end of the second return spring (23) is connected to a slide plate (24), the other side of the slide plate (24) is connected to a limiting column (25), and the limiting column (25) extends to the outside of the mounting sleeve (19) and is plugged into the fixed sleeve (22).

8. The soil moisture content detection device for water conservancy engineering geological survey according to claim 1, characterized in that: The fixed frame (4) is connected to a diverter plate (26), the diverter plate (26) is connected to the air outlet end of the hot air blower (5) through a mounting pipe, the diverter plate (26) is connected to a plurality of air delivery pipes (27), the other end of the air delivery pipe (27) extends to the outside of the fixed frame (4) and is connected to a nozzle head (28), the nozzle head (28) is connected to the connecting filter cartridge (6), the fixed frame (4) is connected to a connecting frame (30), the hot air blower (5) is connected to the connecting frame (30), the fixed frame (4) is connected to a drying plate (29), and the drying plate (29) is located above the air inlet of the hot air blower (5).

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