A farmland flooding early warning device

Abstract

This utility model discloses a farmland flooding early warning device, relating to the field of farmland flooding early warning. It includes a detection box with supporting mechanisms on both sides. Inside the detection box are multiple evenly distributed detection mechanisms, the lower ends of which extend to the bottom of the box. A control box is fixedly mounted on the top of the detection box, containing a battery, a PLC controller, and an alarm. Each detection mechanism includes multiple floats slidably mounted on the bottom of the detection box, with a float ball fixed to the lower end of each float. Touch switches are located inside the detection box at positions corresponding to the upper ends of the floats. This utility model, through a mechanical linkage structure of float ball-float-touch switch, achieves real-time detection and rapid alarm for farmland flooding. Furthermore, the multi-point detection mechanisms cover different locations, adapting to variations in farmland terrain, further improving the comprehensiveness and timeliness of the early warning, and providing a reliable basis for farmland drainage decisions.

Description

Technical Field

[0001] This utility model relates to the field of agricultural meteorological early warning, specifically to an early warning device for farmland flooding caused by heavy rain. Background Technology

[0002] In agricultural production, flooding caused by rainstorms is one of the major disasters affecting crop growth. Accurate flood warnings are crucial for farmland drainage and crop protection.

[0003] Existing farmland waterlogging early warning devices generally adopt single-point or limited-point detection methods. However, farmland irrigation ditches are often hundreds or even thousands of meters long, and the terrain is undulating. Single-point detection cannot reflect the waterlogging situation of the entire area. For example, when the waterlogging in the higher-lying areas upstream has not reached the threshold, severe waterlogging may have already occurred in the low-lying areas downstream. However, the early warning device will miss the report because it does not cover the downstream points. Although sometimes the early warning device is set in the low-lying areas of the irrigation ditch, the water flow may converge along a non-preset path during heavy rain, which may cause newly emerging waterlogging areas to be missed.

[0004] To address this, a farmland flooding early warning device is proposed. Utility Model Content

[0005] In view of the problems existing in the above-mentioned farmland waterlogging early warning devices, a farmland rainstorm waterlogging early warning device is proposed to improve the problems that, due to the undulating terrain, single-point detection cannot reflect the waterlogging situation of the entire area. To achieve the above objectives, this utility model provides the following technical solution:

[0006] A farmland rainstorm flooding early warning device includes a detection box, with support mechanisms on both sides of the detection box. The detection box contains multiple evenly distributed detection mechanisms, with the lower ends of the multiple detection mechanisms extending to the bottom of the detection box. A control box is fixedly installed on the top of the detection box, and a battery, a PLC controller, and an alarm are fixedly installed inside the control box.

[0007] The detection mechanism includes multiple floats slidably disposed at the bottom of the detection box, each float having a fixed float ball at its lower end, a touch switch being provided inside the detection box at a position corresponding to the upper end of each float, and an elastic mechanism being provided between the upper end of each float and the inner wall of the detection box.

[0008] Preferably, the elastic mechanism includes a slide bar that is vertically fixed inside the detection box. The slide bar has a slider on its bar wall. The bottom of the slider is fixedly connected to the upper end of the float. A fixing block is fixedly provided on the bar wall of the slide bar. The touch switch is fixedly provided at the bottom of the fixing block. A spring is sleeved on the bar wall of the slide bar, and the two ends of the spring are fixedly connected to the slider and the fixing block, respectively.

[0009] Preferably, the float is fixedly provided with a limiting ring that contacts the inner wall of the bottom of the detection box.

[0010] Preferably, the support mechanism includes a support ring fixedly disposed on the side wall of the testing box, the support ring having a screw inside, nuts threaded on the screw wall and on both the upper and lower sides of the support ring, and a support pile fixedly disposed at the lower end of the screw.

[0011] Furthermore, an anti-fall-off stop is fixedly provided at the upper end of the screw.

[0012] Preferably, the side wall of the detection box is provided with a detection box door, and the side wall of the control box is provided with a control box door.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] This invention, by setting multiple evenly distributed detection mechanisms inside the detection box, can simultaneously monitor water level changes at different locations in farmland or irrigation ditches. Flexible alarm conditions (such as "≥2 trigger alarms") can be set via a PLC controller to avoid false alarms caused by accidental activation of a single mechanism (e.g., interference from debris). This enables real-time monitoring of farmland waterlogging. Compared to traditional single-point detection, this design can cover a wider lateral area, adapt to micro-topographical differences in farmland, and avoid missed detections due to uncertain water flow paths. When multiple mechanisms are triggered simultaneously, it reflects a large-scale waterlogging risk, providing accurate data for flood drainage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a perspective view of the support mechanism of this utility model;

[0018] Figure 3 This is a three-dimensional view of the test box of this utility model cut open.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Testing box; 2. Support mechanism; 21. Support ring; 22. Screw; 23. Nut; 24. Support pile; 25. Anti-falling block; 3. Testing mechanism; 31. Float rod; 32. Float ball; 33. Touch switch; 34. Elastic mechanism; 341. Sliding rod; 342. Sliding block; 343. Fixing block; 344. Spring; 35. Limiting ring; 4. Control box; 5. Battery; 6. PLC controller; 7. Alarm; 8. Testing box door; 9. Control box door. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] This utility model provides, for example Figure 1 and 3 The device shown is a farmland rainstorm flood warning device, including a detection box 1. The detection box 1 is provided with support mechanisms 2 on both sides. The detection box 1 is provided with multiple evenly distributed detection mechanisms 3 inside, and the lower ends of the multiple detection mechanisms 3 extend to the bottom of the detection box 1. The top of the detection box 1 is fixedly provided with a control box 4, and the control box 4 is fixedly provided with a battery 5, a PLC controller 6 and an alarm 7 inside. The side wall of the detection box 1 is provided with a detection box door 8, and the side wall of the control box 4 is provided with a control box door 9. The detection mechanisms 3 and the alarm 7 are electrically connected to the PLC controller 6 through the battery 5.

[0023] like Figure 1 and 3 As shown, the detection mechanism 3 includes multiple floats 31 slidably disposed at the bottom of the detection box 1. Each float 31 has a float ball 32 fixedly disposed at its lower end. A touch switch 33 is disposed inside the detection box 1 at a position corresponding to the upper end of each float 31. An elastic mechanism 34 is provided between the upper end of each float 31 and the inner wall of the detection box 1. The elastic mechanism 34 includes a sliding rod 341 vertically fixedly disposed inside the detection box 1. A slider 342 is disposed on the rod wall of the sliding rod 341. The bottom of the slider 342 is fixedly connected to the upper end of the float 31. A fixing block 343 is fixedly disposed on the rod wall of the sliding rod 341. The touch switch 33 is fixedly disposed on the fixing block 34. At the bottom of 3, a spring 344 is sleeved on the wall of the slide rod 341, and the two ends of the spring 344 are fixedly connected to the slider 342 and the fixing block 343 respectively. The wall of the float rod 31 is fixedly provided with a limiting ring 35 that contacts the inner wall of the bottom of the detection box 1. The limiting ring 35 can limit the distance of the float rod 31 moving downward. When the float ball 32 rises with the water level, it pushes the slider 342 to compress the spring 344 through the float rod 31. When the water level reaches the threshold, the slider 342 will trigger the touch switch 33. When the water level falls, the slider 342 and the float rod 31 move downward quickly under the elastic force of the spring 344, so that the float rod 31 and the float ball 32 return to the initial position.

[0024] like Figure 1-2 As shown, the support mechanism 2 includes a support ring 21 fixedly mounted on the side wall of the test box 1. The support ring 21 has a screw 22 inside. Nuts 23 are threaded on the upper and lower sides of the screw 22. A support post 24 is fixedly mounted on the lower end of the screw 22. An anti-detachment block 25 is fixedly mounted on the upper end of the screw 22. The anti-detachment block 25 can prevent the screw 22 and the nut 23 from detaching from the inside of the support ring 21. By turning the nut 23 with a wrench, the position of the screw 22 inside the support ring 21 can be adjusted, thereby adjusting the height at which the support post 24 lifts the test box 1.

[0025] When in use, the height is adjusted by rotating the screw 22 of the support mechanism 2 to keep the bottom of the detection box 1 at a suitable distance (e.g., 5-10cm) from the bottom of the farmland irrigation ditch. The support pile 24 is inserted into the soil fixing device, and the screw 22 is locked by the upper and lower nuts 23. The anti-drop block 25 prevents the screw from coming off the top of the support ring 21, ensuring that the device stands stably in the irrigation ditch.

[0026] At this time, the float 32 of the detection mechanism 3 is set downwards, the float 31 is in the initial position under the action of the elastic mechanism 34, the spring 344 is naturally extended, the slider 342 is located at the lower end of the slider 341 and is separated from the touch switch 33 (the touch switch 33 is not triggered), the PLC controller 6 does not receive an alarm signal, and the alarm 7 is in standby mode.

[0027] When heavy rain causes flooding in farmland or irrigation ditches, the rising water level pushes the float 32 to the surface. The float 32 drives the slider 342 to slide upward along the slider 341 via the float rod 31, compressing the spring 344 to store elastic potential energy.

[0028] As the water level continues to rise, the float 31 moves the slider 342 close to the touch switch 33 at the bottom of the fixed block 343. When the water level reaches the preset warning threshold (e.g., a water depth of 10cm), the slider 342 contacts the touch switch 33 and triggers the switch to close, sending an electrical signal to the PLC controller 6. Since the detection box 1 has multiple detection mechanisms 3 inside, it can cover water level detection at different horizontal positions. If the water accumulation in a certain area reaches the threshold, the touch switch 33 of the corresponding detection mechanism is triggered. If multiple areas accumulate water at the same time, multiple switch signals are transmitted synchronously to the PLC controller 6. After receiving the electrical signal from the touch switch 33, the PLC controller 6 immediately executes the alarm logic according to the preset program.

[0029] When the detection mechanism 3 is triggered (can be set to "≥2 trigger alarms"), the PLC controller 6 outputs a high-level signal to the alarm 7. After receiving the signal, the alarm 7 (such as a buzzer) emits an audible alarm (such as a buzzing sound) to remind farmers or farmland managers to check for water accumulation hazards in a timely manner. Throughout the process, the battery 5 provides continuous power to the PLC controller 6, alarm 7 and detection mechanism 3 in the control box 4 to ensure that the device works normally in the event of a power outage or in the field.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A farmland rainstorm water accumulation early warning device comprising a detection box (1), characterized in that: The detection box (1) is provided with support mechanisms (2) on both sides. The detection box (1) is provided with multiple evenly distributed detection mechanisms (3) inside, and the lower ends of the multiple detection mechanisms (3) extend to the bottom of the detection box (1). The top of the detection box (1) is fixedly provided with a control box (4), and the control box (4) is fixedly provided with a battery (5), a PLC controller (6) and an alarm (7). The detection mechanism (3) includes multiple floats (31) slidably disposed at the bottom of the detection box (1). Each float (31) has a float ball (32) fixedly disposed at its lower end. Each detection box (1) has a touch switch (33) disposed inside the detection box (1) at a position corresponding to the upper end of the multiple floats (31). An elastic mechanism (34) is disposed between the upper end of the multiple floats (31) and the inner wall of the detection box (1).

2. The farmland rainwater accumulation warning device according to claim 1, characterized in that: The elastic mechanism (34) includes a slide rod (341) vertically fixed inside the detection box (1). The slide rod (341) has a slider (342) on its wall. The bottom of the slider (342) is fixedly connected to the upper end of the float (31). The slide rod (341) has a fixed block (343) fixedly installed on its wall. The touch switch (33) is fixedly installed at the bottom of the fixed block (343). The slide rod (341) has a spring (344) sleeved on its wall. The two ends of the spring (344) are fixedly connected to the slider (342) and the fixed block (343) respectively. 3.The farmland rainstorm water accumulation warning device according to claim 1, characterized in that: The float (31) has a limiting ring (35) fixedly installed on its rod wall, which is in contact with the bottom inner wall of the detection box (1).

4. The farmland rainwater accumulation warning device according to claim 1, characterized by: The support mechanism (2) includes a support ring (21) fixedly installed on the side wall of the test box (1). The support ring (21) has a screw (22) inside. Nuts (23) are threaded on the rod wall of the screw (22) and on both the upper and lower sides of the support ring (21). A support pile (24) is fixedly installed at the lower end of the screw (22). 5.The farmland rainstorm water accumulation warning device according to claim 4, characterized in that: The upper end of the screw (22) is fixed with an anti-fall-off block (25). 6.The farmland rainstorm water accumulation warning device according to claim 1, characterized in that: The side wall of the detection box (1) is provided with a detection box door (8), and the side wall of the control box (4) is provided with a control box door (9).

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