Overflow trigger switching value device for monitoring soil loss

Abstract

The invention discloses an overflow trigger switching value device for monitoring soil loss, which is applied to the field of hydrological monitoring, and is characterized in that a rotatable filter screen piece is arranged at a water inlet source of a confluence funnel, so that active separation and interception of silt and runoff are realized, and then muddy water data collection is performed on liquid entering a tipping bucket body; through cooperation of a screen frame, a push block and a movable stop block, silt transferred into a transfer frame when a filter screen piece rotates is regularly transferred into a collecting box screen frame for draining and collecting, water and soil loss synchronous monitoring is achieved, in addition, a drainage pipe and a flow meter are additionally arranged at the bottom of the tipping bucket, the last bucket of residual water is included in monitoring data, and it is ensured that the monitoring data are complete and accurate; in addition, a retractable auxiliary screen is additionally arranged in the collecting box, particulate matter grading collection guided by a monitoring target is achieved, and the multi-scene monitoring requirement can be met.

Description

An overflow-triggered switching device for monitoring soil loss Technical Field

[0001] This invention relates to the field of hydrological monitoring, and in particular to an overflow-triggered switching device for monitoring soil loss. Background Technology

[0002] Overflow triggering devices are core equipment in fluid monitoring and industrial safety early warning systems. They are used to capture overflow signals from water tanks, pipelines, and precision containers in real time, providing triggering basis for downstream alarms, valve control, and soil erosion control. They are mainly divided into two categories: one is electronic level triggering devices, which are prone to short circuits and scaling in humid, cluttered outdoor or precision environments, resulting in a high failure rate; the other is mechanical tipping-type triggering devices, which suffer from insufficient adjustment precision, cumbersome maintenance, and poor flow adaptability.

[0003] The prior art CN202511054259.9 discloses an automatic runoff sediment monitoring instrument without power supply. This monitoring instrument can realize the automatic measurement of sediment volume without external power supply and is suitable for field environments without power grid.

[0004] The prior art CN202510033214.7 discloses a measuring device and method for monitoring soil erosion in a field runoff plot. The device separates sediment and measures its weight through a filter funnel, calculates water volume using a double-flipping container and a sensor, and finally drains the water through a drainage system to complete the monitoring.

[0005] However, rainfall intensity fluctuates during the precipitation process, resulting in variations in runoff sediment content at different stages. Since the tipping bucket switches based on weight, the water-to-sediment ratio within the bucket is not constant at each stage. Using a uniform density value for calculation leads to insufficient accuracy in the test results. Furthermore, if the filter surface is not cleaned promptly, blockages can form, causing overflow and loss of test samples. Additionally, towards the end of the monitoring operation, when the weight of the water in the tipping bucket is insufficient to trigger the switching, omissions can occur, further reducing the accuracy of the monitoring results. Summary of the Invention

[0006] The core of this invention lies in the synergistic effect of the filter screen, adapter frame, and drainage pipe to achieve sediment separation at the water inlet of the confluence funnel. Subsequently, data on the sludge and water content of the liquid entering the tipping bucket is collected. Based on this, combined with the weight of sediment collected by the screen frame and the liquid data measured by the drainage pipe, a more accurate soil loss monitoring result can be obtained. This solution effectively solves the problem of insufficient calculation accuracy caused by the direct collection of turbid water in existing technologies. Furthermore, the addition of a retractable auxiliary screen inside the collection box enables target-oriented, graded collection of particulate matter, allowing this invention to meet the monitoring needs of multiple scenarios.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] An overflow-triggered switching device for monitoring soil loss includes a housing with a built-in tipping bucket, a chute installed on the inner wall of the housing, the tipping bucket including two tipping buckets, and a drain pipe with a flow meter mounted on its surface installed through the bottom of each tipping bucket, symmetrically arranged adjusting arms installed on the inner wall of the housing, and a filter screen rotatably installed on the top of the housing.

[0009] A collection box is installed on one side of the outer wall of the casing. An adapter frame is installed on the top surface of the filter screen. A constraint rod is rotatably connected at the center of the top of the filter screen, and the surface of the constraint rod is connected to one end of the adapter frame. A movable stop is slidably connected to the top of the adapter frame. A push block is slidably installed on the inner wall of the adapter frame. A fixed block is installed on the top of the collection box. An electric push rod 1, whose power end is connected to the surface of the push block, is installed on the surface of the fixed block. An adapter channel is connected to the other end of the adapter frame. A mesh frame is slidably installed on the inner wall of the collection box. A protective sleeve is installed on the top of the adapter frame. An electric push rod 2, whose power end is connected to the movable stop, is installed inside the protective sleeve.

[0010] Furthermore, a drive motor is installed on the top of the housing, a gear ring is fitted onto the surface of the filter screen inside the housing, a gear is connected to the output end of the drive motor and meshes with the gear ring, and a protective sleeve is connected to the surface of the adapter frame and the fixing block on the outside of the electric push rod.

[0011] Furthermore, a tilting motor is installed on the surface of the outlet of the confluence funnel. The output end of the tilting motor is connected to a baffle located inside the outlet, and the two sides of the baffle are chamfered.

[0012] Furthermore, a tipping shaft is installed through the inside of the tipping bucket component, and tipping brackets are installed at both ends of the tipping shaft. An arc-shaped scale frame is installed on the top of the tipping bracket. An overflow pipe located below the filter screen component is installed on the inner wall of the outer shell, and an auxiliary tipping bucket with the same structure as the tipping bucket component is installed on the inner wall of the outer shell.

[0013] Furthermore, a constraint plate located below the tipping bucket is inserted through the interior of the tipping bucket support, and the cross-sectional width of the tipping bucket in the unloaded state is less than the horizontal distance between the two adjusting arms in the vertically placed state.

[0014] Furthermore, a lifting block is installed on the inner wall of the outer casing, and the surface of the lifting block is rotatably connected to the inner wall of the adjusting arm. An adjusting rod is installed inside the adjusting arm, and one end of the adjusting rod extends to the outside of the outer casing.

[0015] Preferably, a winding rod is installed on the front of the collection box via a self-resetting rotating shaft, and a storage box is installed on the back of the collection box. A round rod is rotatably installed inside the storage box. The inner walls of the collection box and the storage box are provided with through grooves, and an auxiliary screen with a mesh diameter greater than the mesh frame diameter is slidably connected inside the grooves. Ropes are connected to both the front and back of the auxiliary screen, and the ends of the two ropes are respectively connected to the surfaces of the winding rod and the round rod.

[0016] Furthermore, a winding motor is installed on the surface of the storage box, and the end of the winding motor is connected to one end of the round rod. A suction pump is installed on the top of the collection box, and multiple nozzles are installed on the inner top wall of the collection box.

[0017] Compared with the prior art, the advantages of this invention are:

[0018] (1) This application achieves active separation and interception of sediment and runoff by setting a rotatable filter screen at the water inlet of the confluence funnel. Then, the liquid entering the tipping bucket is collected for mud and water data. With the help of the mesh frame, push block and movable baffle, the sediment transferred to the transfer frame when the filter screen rotates is transferred to the collection box mesh frame for drainage and collection in a timely manner, so as to realize the synchronous monitoring of soil and water loss. In addition, a drainage pipe and flow meter are added to the bottom of the tipping bucket to include the residual water in the last bucket in the monitoring data to ensure the completeness and accuracy of the monitoring data.

[0019] (2) This application adds a retractable auxiliary screen inside the collection box to achieve target-oriented graded collection of particulate matter. For agricultural soil loss monitoring, the auxiliary screen can be unfolded by a winding motor to intercept large stones that have no fertility significance, thus avoiding the weight of the stones from affecting the subsequent calculation results of sediment content. It also works with the spray nozzle to ensure that sediment particles fall into the lower mesh frame, preventing any omissions during mesh frame collection. For engineering or ecological monitoring, the auxiliary screen can be retracted to achieve full particulate matter collection. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of the outer shell of the present invention;

[0022] Figure 3 is an enlarged schematic diagram of point A in Figure 2 of this invention;

[0023] Figure 4 is a structural schematic diagram of the collection box, auxiliary tipping bucket, constraint plate and adjusting rod of the present invention;

[0024] Figure 5 is a schematic diagram of the components of the adapter frame of the present invention;

[0025] Figure 6 is a structural schematic diagram of the electric actuator 2, the protective sleeve and the movable stop block of the present invention;

[0026] Figure 7 is a schematic diagram of the state in which the adjusting arm of the present invention has a vertical placement time interval greater than the cross section of the tipping bucket;

[0027] Figure 8 is a schematic diagram of the auxiliary screen, suction pump and nozzle of the present invention;

[0028] Figure 9 is a structural schematic diagram of the winding rod, round rod, winding motor and storage box of the present invention;

[0029] Figure 10 is a schematic diagram of the auxiliary screen of the present invention removing larger stones.

[0030] Explanation of the labels in the diagram:

[0031] 1. Outer shell; 11. Overflow pipe; 12. Constraint plate; 13. Adjusting rod; 2. Tipping bucket component; 21. Tipping bucket support; 22. Arc-shaped scale frame; 23. Drain pipe; 3. Filter screen component; 31. Gear ring component; 32. Gear component; 4. Converging funnel; 41. Tilting motor; 42. Partition plate; 5. Collection box; 51. Mesh frame; 52. Winding rod; 53. Suction pump; 54. Nozzle; 55. Auxiliary screen; 56. Winding motor; 57. Storage box; 6. Drive motor; 7. Sheath; 8. Adjusting support arm; 9. Transfer frame; 91. Constraint rod; 92. Push block; 93. Movable stop block; 94. Electric push rod one; 95. Transfer channel; 96. Electric push rod two; 10. Auxiliary tipping bucket. Detailed Implementation

[0032] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0033] Example 1:

[0034] Please refer to Figures 1-6. An overflow-triggered switch device for monitoring soil loss includes a housing 1 with a built-in tipping bucket 2. A collection funnel 4 is installed on the inner wall of the housing 1. The tipping bucket 2 includes two tipping buckets, and a drain pipe 23 with a flow meter installed on the surface is installed through the bottom of each tipping bucket. A symmetrically arranged adjusting support arm 8 is installed on the inner wall of the housing 1. A filter screen 3 is rotatably installed on the top of the housing 1.

[0035] A collection box 5 is installed on one side of the outer wall of the outer casing 1. A transition frame 9 is installed on the top surface of the filter screen 3. A constraint rod 91 is rotatably connected at the center of the top of the filter screen 3, and the surface of the constraint rod 91 is connected to one end of the transition frame 9. A movable stop 93 is slidably connected to the top of the transition frame 9. A push block 92 is slidably installed on the inner wall of the transition frame 9. A fixed block is installed on the top of the collection box 5. An electric push rod 94 with a power end connected to the surface of the push block 92 is installed on the surface of the fixed block. A transition channel 95 is connected to the other end of the transition frame 9. A mesh frame 51 is slidably installed on the inner wall of the collection box 5. A protective sleeve is installed on the top of the transition frame 9. An electric push rod 96 with a power end connected to the movable stop 93 is installed inside the protective sleeve.

[0036] A flip motor 41 is installed on the surface of the outlet of the confluence funnel 4. The output end of the flip motor 41 is connected to a baffle 42 located inside the outlet, and the two sides of the baffle 42 are chamfered.

[0037] Please refer to Figures 1-2 and 4. A drive motor 6 is installed on the top of the housing 1. A gear ring 31 located inside the housing 1 is sleeved on the surface of the filter screen 3. A gear 32 that meshes with the gear ring 31 is connected to the output end of the drive motor 6. A protective sleeve 7 (providing waterproof protection for the electric actuator 94) is connected to the surface of the adapter frame 9 and the fixing block.

[0038] Specifically, when using the tipping bucket technology to calculate the flow rate, the fluid is usually directly introduced into the interior of the manifold funnel 4, and then into one of the tipping buckets in the tipping bucket component 2 below. When the weight in the tipping bucket reaches a specified threshold, the other tipping bucket in the tipping bucket component 2 switches under the action of the tipping bucket shaft. During this process, the reed switch (installed inside the tipping bucket bracket 21, the technical principle of which is existing technology and will not be described in detail here) is driven to generate pulses, thereby achieving the purpose of acquiring switch signals. At the same time, the flow rate of the water flowing out of the manifold funnel 4 is controlled by judging the frequency of the switch signal acquisition.

[0039] In this application, the flow rate of the water in the confluence funnel 4 is first adjusted by rotating the partition 42 by the flipping motor 41 to a certain angle. Then, the angle of the tilting bucket angle adjustment arm 8 on the opposite side is adjusted to support the tilting bucket 2. After that, a known weight of distilled water is manually poured into the confluence funnel 4. When the angle reaches the required threshold, the tilting bucket fixed on the tilting bucket shaft flips to discharge the water. At the same time, the reed switch is triggered to realize the switching action and angle indication. Then, this angle is set as the parameter of one side, and the adjustment rod 13 corresponding to the adjustment arm 8 on this side is tightened.

[0040] After the tipping bucket flips to one side, water continues to flow while the other tipping bucket is in a water-receiving state. When the weight of the water in the other tipping bucket reaches the tipping condition, it flips again, and this cycle repeats to trigger the reed switch to generate a pulse, thereby realizing the acquisition of switch signals.

[0041] In actual monitoring activities, in order to achieve the goal of monitoring soil loss, it is necessary to measure the amount of water and sediment in the runoff separately in order to obtain the corresponding monitoring data.

[0042] In this application, the runoff first passes through the surface of the filter screen 3, intercepting sediment and ensuring that the sediment content in the water entering the confluence funnel 4 after passing through the filter screen 3 remains stable. Then, the tipping bucket 2 and auxiliary tipping bucket 10 are used for tipping switching to acquire switch data. During this process, the drive motor 6 (a waterproof cover can be installed outside the drive motor 6 to avoid adverse effects from water) drives the gear 32 and gear ring 31 to rotate, causing the filter screen 3 to rotate relative to the transfer frame 9. This transfers the sediment and other solid particles intercepted on the surface of the filter screen 3 to the interior of the transfer frame 9. Subsequently, the electric actuator 2 96 drives the movable stop 93. After the transfer frame 9 is lowered and sealed, the electric actuator 94 is activated, causing the push block 92 (the cross-sectional dimensions of the push block 92 are the same as the cross-sectional dimensions of the inner wall of the transfer frame 9 after the movable stop block 93 is lowered, thus achieving a corresponding scraping effect) to move in the direction of the restraint rod 91. This pushes the mud, sand and other solid particles in the transfer frame 9 into the mesh frame 51 of the collection box 5 (the transfer channel 95 connects the transfer frame 9 and the collection box 5, and the tail end of the transfer channel 95 is located above the mesh frame 51), achieving a drainage effect. Then, the electric actuator 94 drives the push block 92 back to the initial position, and the electric actuator 96 is activated to drive the movable stop block 93 to move upward, continuing the transfer operation.

[0043] In this way, source-based sediment control can be achieved during the monitoring of soil erosion. When the tipping bucket 2 and the auxiliary tipping bucket 10 switch, a turbidity sensor (the appropriate model of turbidity sensor can be selected according to actual needs) is installed on the surface of the tipping bucket to monitor the turbidity of the liquid in the tipping bucket at different stages of rainfall. Based on the turbidity value, the entire rainfall monitoring period of the tipping bucket is divided into several stages. In each stage, the turbidity value in the tipping bucket is basically stable. Then, based on the tipping bucket switching frequency, turbidity value and single tipping amount in each stage, the mud and water data of the liquid in each stage are obtained. Then, the data are summed to obtain the mud and water data in the filtered liquid during the rainfall cycle. After the monitoring is completed, the collected material in the mesh frame 51 is weighed directly. Combined with the drained liquid in the collection box 5 and the liquid volume in the drain pipe 23, the monitoring results of soil loss during rainfall are obtained.

[0044] During the aforementioned monitoring operation, when the tipping buckets in tipping bucket 2 and auxiliary tipping bucket 10 receive water for the last time, the weight of the liquid inside the tipping bucket is insufficient to trigger the tipping switch, thus not triggering the switch. Consequently, this portion of liquid is not included in the monitoring data, which reduces the accuracy of the detection results. To improve this issue, the drain pipe 23 installed inside the tipping bucket can start timing after the last triggering of the switch. If no signal is triggered within a specified time (which can be set according to actual conditions) (i.e., the tipping bucket no longer switches), the control valve and flow meter installed on the surface of the drain pipe 23 are opened to discharge the remaining liquid inside the tipping bucket and monitor the amount of liquid flowing through it. This liquid is then included in the monitoring data for unified comprehensive calculation.

[0045] Finally, a movable door is provided on the side of the collection box 5 facing away from the outer shell 1. After opening the movable door, the wire frame 51 (which is slidably fitted into the inner wall of the collection box 5) can be taken out.

[0046] Please refer to Figures 1-2. The tipping bucket component 2 has a tipping bucket shaft installed through it, and tipping bucket brackets 21 are installed at both ends of the tipping bucket shaft. An arc-shaped scale bracket 22 is installed on the top of the tipping bucket bracket 21.

[0047] Specifically, during this process, a pointer that is slidably connected to the arc-shaped scale frame 22 at the center of one side surface of the tipping bucket 2 can clearly show the tipping status of the tipping bucket 2.

[0048] Please refer to Figure 4. An overflow pipe 11 located below the filter screen 3 is installed on the inner wall of the outer casing 1, and an auxiliary tipping bucket 10 with the same structure as the tipping bucket 2 is installed on the inner wall of the outer casing 1.

[0049] Specifically, when the water flow rate of the manifold funnel 4 is less than the water flow rate, the water level inside the manifold funnel 4 will rise, causing overflow and reducing the water volume, which in turn reduces the detection results and thus reduces the reliability of the detection results. To improve this problem, an overflow pipe 11 is installed. When overflow occurs, the excess water is transferred to the bottom of the auxiliary tipping bucket 10 through the overflow pipe 11 to continue the tipping operation. Subsequently, the switching of the tipping bucket component 2 and the auxiliary tipping bucket 10 needs to be combined to ensure the accuracy of the detection results.

[0050] Please refer to Figure 4. The inside of the tipping bucket bracket 21 is connected to a constraint plate 12 located below the tipping bucket, and the cross-sectional width of the tipping bucket 2 in the unloaded state is less than the horizontal distance between the two adjusting arms 8 in the vertically placed state.

[0051] Please refer to Figures 1-4. A lifting block is installed on the inner wall of the outer casing 1, and the surface of the lifting block is rotatably connected to the inner wall of the adjusting arm 8. An adjusting rod 13 is installed inside the adjusting arm 8, and one end of the adjusting rod 13 extends to the outside of the outer casing 1.

[0052] Specifically, when the tipping bucket 2 needs to be centrally maintained, the constraint on the adjusting rod 13 needs to be released first (this can be done by installing a constraint seat with an internal screw at the end of the adjusting rod 13, and arranging multiple threaded holes around the adjusting rod 13 on the outer surface of the outer shell 1 to constrain the adjusting rod 13, or by other technical means, but it is not fixed). Then, rotate the adjusting rod 13 to make it drive the adjusting arm 8 to rotate to a vertical position. After that, the constraint plate 12 can be pulled out, and the tipping bucket 2 can be removed for maintenance, achieving convenient overall replacement and maintenance.

[0053] Example 2:

[0054] Please refer to Figures 8 and 9. A winding rod 52 is installed on the front of the collection box 5 via a self-resetting rotating shaft. A storage box 57 is installed on the back of the collection box 5, and a round rod is rotatably installed inside the storage box 57. The inner walls of the collection box 5 and the storage box 57 are provided with through grooves, and an auxiliary screen 55 with a mesh diameter greater than that of the mesh frame 51 is slidably connected inside the grooves. Ropes are connected to both the front and back of the auxiliary screen 55, and the ends of the two ropes are respectively connected to the surface of the winding rod 52 and the round rod.

[0055] A winding motor 56 is installed on the surface of the storage box 57, and the end of the winding motor 56 is connected to one end of the round rod. A suction pump 53 is installed on the top of the collection box 5, and multiple nozzles 54 are installed on the inner top wall of the collection box 5.

[0056] Specifically, in Example 1, the filter element 3 can achieve the same interception effect on larger stones in the runoff (especially stones larger than 0.5 cm). However, in agricultural soil loss monitoring, such stones have almost no effect on soil fertility. Therefore, in agricultural soil loss monitoring operations, the weight of the above-mentioned stones is meaningless to the monitoring results and they need to be removed from the mesh frame 51. If soil loss monitoring is carried out in the context of engineering, geological disasters, or ecological environmental protection, the weight of the above-mentioned stones needs to be counted and they do not need to be removed from the mesh frame 51.

[0057] When it is not necessary to remove larger stones, the winding motor 56 can be used to drive the round rod to wind up, so that the auxiliary screen 55 can be transferred to the inside of the storage box 57. At this time, the material collection operation is carried out by the wire frame 51 as in Example 1.

[0058] Please refer to Figure 10. When it is necessary to remove larger stones, the winding motor 56 is turned off. Under the action of the self-resetting rotating shaft, the auxiliary screen 55 is moved to the top of the mesh frame 51 to intercept the larger stones. At the same time, the suction pump 53 is used to pump the drained liquid to the nozzle 54 (the suction pump 53 and the nozzle 54 are connected by a pipe to achieve the corresponding liquid transfer). The objects intercepted by the auxiliary screen 55 are rinsed to prevent small particles stuck to the surface of the larger stones from not reaching the mesh frame 51 below, thus ensuring the accuracy of collection. After the monitoring is completed, the stones on the surface of the auxiliary screen 55 are removed.

[0059] In this embodiment, to facilitate the removal of stones from the surface of the auxiliary screen 55, a short rod can be installed on the top of the filter element 3. The short rod and the constraint rod 91 are not fixedly connected, so the constraint rod 91 is not affected when the filter element 3 rotates. The collection box 5 is designed as an upper and lower snap-fit ​​structure, and the snap-fit ​​position is above the slide groove. Other methods can also be used to remove large stones intercepted on the surface of the auxiliary screen 55, and the method is not fixed.

[0060] Finally, in this application, the working principles of the flipping motor 41, the winding motor 56, the electric push rod 1 94 and the electric push rod 2 96 are all existing technologies and will not be elaborated here. The specific models are selected according to actual working needs and are not fixed.

[0061] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. An overflow-triggered switching device for monitoring soil loss, comprising a housing (1) with a built-in tipping bucket (2), characterized in that: The inner wall of the outer shell (1) is equipped with a chute (4), the tipping bucket (2) includes two tipping buckets, and the bottom of each tipping bucket is perforated by a drain pipe (23) with a flow meter mounted on its surface. The inner wall of the outer shell (1) is equipped with symmetrically arranged adjusting arms (8), and the top of the outer shell (1) is rotatably equipped with a filter screen (3). A collection box (5) is installed on one side of the outer wall of the outer shell (1), and a transition frame (9) is installed on the top surface of the filter screen (3). A constraint rod (91) is rotatably connected at the center of the top of the filter screen (3), and the surface of the constraint rod (91) is flush with the transition frame (9). One end is connected to the top of the adapter frame (9), a movable stop (93) is slidably connected to the top of the adapter frame (9), a push block (92) is slidably installed on the inner wall of the adapter frame (9), a fixed block is installed on the top of the collection box (5), an electric push rod (94) with the power end connected to the surface of the push block (92) is installed on the surface of the fixed block, the other end of the adapter frame (9) is connected to the adapter channel (95), a mesh frame (51) is slidably installed on the inner wall of the collection box (5), a protective sleeve is installed on the top of the adapter frame (9), and an electric push rod (96) with the power end connected to the movable stop (93) is installed inside the protective sleeve.

2. The overflow-triggered switching device for monitoring soil loss according to claim 1, characterized in that: A drive motor (6) is installed on the top of the housing (1), a gear ring (31) located inside the housing (1) is sleeved on the surface of the filter screen (3), a gear (32) meshing with the gear ring (31) is connected to the output end of the drive motor (6), and a sheath (7) located outside the electric push rod (94) is connected to the surface of the adapter frame (9) and the fixing block.

3. The overflow-triggered switching device for monitoring soil erosion according to claim 1, characterized in that: The surface of the outlet of the confluence funnel (4) is equipped with a flip motor (41), the output end of which is connected to a partition (42) located inside the outlet, and the two sides of the partition (42) are chamfered.

4. The overflow-triggered switching device for monitoring soil loss according to claim 1, characterized in that: The tipping bucket (2) has a tipping bucket shaft installed through its interior, and tipping bucket brackets (21) are installed at both ends of the tipping bucket shaft. An arc-shaped scale bracket (22) is installed on the top of the tipping bucket bracket (21). An overflow pipe (11) located below the filter screen (3) is installed on the inner wall of the outer shell (1), and an auxiliary tipping bucket (10) with the same structure as the tipping bucket (2) is installed on the inner wall of the outer shell (1).

5. The overflow-triggered switching device for monitoring soil erosion according to claim 4, characterized in that: The tipping bucket support (21) has a constraint plate (12) inserted through it, located below the tipping bucket, and the cross-sectional width of the tipping bucket (2) in the unloaded state is less than the horizontal distance between the two adjusting arms (8) in the vertically placed state.

6. The overflow-triggered switching device for monitoring soil erosion according to claim 1, characterized in that: The inner wall of the outer shell (1) is equipped with a lifting block, and the surface of the lifting block is rotatably connected to the inner wall of the adjusting arm (8). An adjusting rod (13) is installed inside the adjusting arm (8), and one end of the adjusting rod (13) extends to the outside of the outer shell (1).

7. The overflow-triggered switching device for monitoring soil loss according to claim 1, characterized in that: The front of the collection box (5) is equipped with a winding rod (52) via a self-resetting rotating shaft. The back of the collection box (5) is equipped with a storage box (57), and a round rod is rotatably installed inside the storage box (57). The inner walls of the collection box (5) and the storage box (57) are provided with through grooves, and an auxiliary screen (55) with a mesh diameter greater than that of the mesh frame (51) is slidably connected inside the grooves. The front and back of the auxiliary screen (55) are connected with ropes, and the ends of the two ropes are respectively connected to the surface of the winding rod (52) and the round rod.

8. The overflow-triggered switching device for monitoring soil loss according to claim 7, characterized in that: The surface of the storage box (57) is equipped with a winding motor (56), and the end of the winding motor (56) is connected to one end of the round rod. The top of the collection box (5) is equipped with a suction pump (53), and the inner top wall of the collection box (5) is equipped with multiple nozzles (54).

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