An automatic online monitoring and alarm device for water conservancy flood conditions

Abstract

The present application relates to an automatic online monitoring and alarm device for water conservancy flood conditions, which includes a vertical pole, a water level sensor, a central processing unit, a warning device and a communication module. The top of the vertical pole is connected to a mounting box, a winding roller is arranged inside the vertical pole, an escape rope is wound on the winding roller, and the free end of the escape rope is fixedly connected to the mounting box; an air bag is arranged around the bottom of the mounting box, and an automatic inflation mechanism for filling the air bag with gas when the water level is submerged above the top of the vertical pole; a watertight compartment is arranged inside the vertical pole, and a displacement sensor for detecting the unwinding length of the escape rope on the winding roller and an angle sensor for detecting the swing angle of the escape rope are arranged in the watertight compartment, and the displacement sensor and the angle sensor are both connected to the central processing unit; the central processing unit is configured to calculate the instantaneous water level depth according to the values ​​detected by the displacement sensor and the angle sensor. The present application can monitor flood information such as water level depth after the water level submerges the vertical pole and the mounting box escapes with the help of the escape rope.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy monitoring equipment, and in particular to an automatic online monitoring and alarm device for water conservancy flood conditions. Background Art

[0002] The automatic monitoring and alarm device for water conservancy flood conditions is a device that uses modern information technology and automation to monitor and warn water conservancy facilities and water conditions in the basin in real time. Generally, it can monitor key parameters such as water level, rainfall, flow rate, etc. in real time, and when the monitored data exceeds the preset safety threshold, the system will automatically trigger an alarm; and it can also remotely transmit the monitoring data to the monitoring center or relevant departments through wireless or wired communication networks. It is an important monitoring device in the current flood warning system and flood disaster disposal system.

[0003] In the related art, a Chinese patent with application number CN201820083394.5 proposes an automatic monitoring and alarm device for water conservancy flood conditions, including a vertical pole, a horizontal pole, a distance measuring sensor, a water level sensor, a central processing unit, a subtitle driving circuit, and a display screen. The lower ball joint of the horizontal pole is connected to a swing block, and a proximity sensor is provided on the horizontal pole below the swing block and facing the swing block. The proximity sensor is connected to a control circuit, and the horizontal pole is connected to a warning device. The control circuit controls the action of the warning device according to the output of the proximity sensor. When the vertical pole tilts, since the swing block is ball-hinged at the lower part of the horizontal pole, the swing block will remain in a vertical state. At this time, the distance between the swing block and the proximity sensor changes, and the output of the proximity sensor also changes accordingly. The control circuit controls the action of the warning device according to the current output of the proximity sensor, warns nearby personnel, and corrects the vertical pole in time to ensure the accuracy of monitoring.

[0004] The above-mentioned related technologies have the following defects: At present, most of the flood monitoring equipment can only monitor static waters in the early stage of a flood or before a flood breaks out. Once the water level in the flood control area is too high or even submerges the flood monitoring equipment, the flood monitoring equipment can no longer continue to play a monitoring role, and thus it is impossible to obtain first-hand information on the flood situation. Especially in flood-prone areas, it is difficult to make accurate disposal plans in the first time, which may lead to delays in various rescue operations and cause large economic losses. Summary of the invention

[0005] In order to improve the problem that conventional flood monitoring equipment cannot continue to monitor the flood situation after being submerged, the present application provides an automatic online monitoring and alarm device for water conservancy flood situation.

[0006] The present application provides an automatic online monitoring and alarm device for water conservancy flood conditions, which adopts the following technical solutions:

[0007] An automatic online monitoring and alarm device for water conservancy flood conditions, comprising a pole, a water level sensor, a central processing unit, a warning device and a communication module, wherein the communication module is used to send out flood information processed by the central processing unit, an installation box is movably connected to the top of the pole, the water level sensor, the warning device and the communication module are all sealed and arranged in the installation box, a winding roller is rotatably arranged in the pole, an escape rope is wound on the winding roller, and the free end of the escape rope is fixedly connected to the installation box;

[0008] An air bag is arranged around the bottom of the installation box and an automatic inflation mechanism is used to fill the air bag with gas when the water level is above the top of the vertical pole. The buoyancy of the air bag in water after inflation is greater than the overall gravity of the installation box.

[0009] A watertight compartment is provided in the vertical pole, and a displacement sensor for detecting the unwinding length of the escape rope on the winding roller and an angle sensor for detecting the swinging angle of the escape rope are provided in the watertight compartment, and the displacement sensor and the angle sensor are both connected to the central processor;

[0010] The central processor is configured to calculate the instantaneous water level depth according to the values ​​detected by the displacement sensor and the angle sensor.

[0011] Furthermore, the instantaneous water level depth is calculated as follows:

[0012] L = l0 + Sinθ·l';

[0013] in,

[0014] L——the instantaneous water level depth;

[0015] l0——the water level depth indicated by the top of the vertical pole;

[0016] θ——the deflection angle of the escape rope relative to the water surface, detected by the angle sensor;

[0017] l'——the length of the escape rope unwound from the winding roller, detected by the displacement sensor.

[0018] Furthermore, a timer and a rotary drive member for driving the winding roller to rotate are provided in the watertight compartment, and the rotary drive member and the timer are both connected to the central processor;

[0019] The central processing unit is configured to control the rotary drive member to drive the winding roller to wind up the escape rope to a certain length, and then release the winding roller to calculate the flow speed of the airbag driven by the water flow as a reference value of the water flow speed.

[0020] Furthermore, the flow velocity of the airbag under the impact of water flow is calculated as follows:

[0021]

[0022] in,

[0023] V——the flow velocity of the airbag under the impact of water flow;

[0024] l n+1 ——The length of the escape rope unwound from the winding roller when the counter stops timing is detected by the displacement sensor;

[0025] θ n+1 - the deflection angle of the escape rope relative to the water surface when the counter stops timing, detected by the angle sensor;

[0026] l n ——The length of the escape rope unwound from the reel when the counter starts timing is detected by the displacement sensor;

[0027] θ n - the deflection angle of the escape rope relative to the water surface when the counter starts timing, detected by the angle sensor;

[0028] t——the duration from the start to the end of the counter.

[0029] Furthermore, an upper through hole is provided on the top of the watertight compartment for the escape rope to pass through, a support frame is installed on the top of the watertight compartment, a guide ball is rotatably installed on the support frame, a steering shaft is fixedly connected to two radially opposite outer walls of the guide ball, a line connecting the two steering shafts passes through the center of the guide ball, the guide ball is rotatably installed on the support frame through the steering shaft, and the angle sensor is installed on the support frame and is used to detect the flip angle of the steering shaft;

[0030] The guide ball is penetrated with a guide hole along its diameter direction, and the extension direction of the guide hole is perpendicular to the extension direction of the steering shaft. The escape rope passes through the guide hole after passing through the upper hole; in the initial state, the guide hole is vertically aligned with the upper hole.

[0031] Furthermore, an oil seal box is fixedly connected to the top wall of the watertight compartment, a lower through hole corresponding to the upper through hole is opened on the bottom wall of the oil seal box, a hydrophobic solid grease layer is filled in the oil seal box, the upper through hole and the lower through hole are both adapted to the escape rope, and the winding roller first passes through the lower through hole and then through the upper through hole after unwinding the escape rope.

[0032] Furthermore, the top wall and the bottom wall of the oil seal box are filled with sealing members covering the upper through hole and the lower through hole, and the sealing member is penetrated by a through hole for the escape rope to pass through, and the diameter of the through hole is smaller than the outer diameter of the escape rope.

[0033] Furthermore, an oil pushing plate is slidably provided on the side wall of the oil seal box, and an elastic member that contacts the inner wall of the oil seal box is provided on the side of the oil pushing plate away from the solid grease layer. The moving direction of the oil pushing plate under the action of the deformation force of the elastic member is orthogonal to the travel trajectory of the escape rope in the oil seal box.

[0034] Furthermore, the automatic inflation mechanism comprises a chemical gas generator disposed on the mounting box, a gas outlet of the chemical gas generator is connected to a one-way valve and communicates with the airbag, and the chemical gas generator is connected to the central processing unit;

[0035] The central processing unit is configured to control the chemical gas generator to operate when the water level sensor detects that the water level is close to the top of the push rod.

[0036] Furthermore, a mounting sleeve is fixedly connected to the bottom of the mounting box and is sleeved on the outer side of the top of the vertical pole.

[0037] In summary, the beneficial technical effects of this application are:

[0038] 1. When the water level rises to the top of the pole, the automatic inflation mechanism is triggered and fills the airbag with gas. The airbag can drive the installation box to float on the water surface, which can ensure the safety of the electronic components in the installation box and ensure that they can continue to work normally; and as the water level continues to rise, driven by the buoyancy of the airbag, the installation box escapes from the top of the pole and floats up, pulling the escape rope and unwinding the winding roller; under the impact of the water flow, the airbag drives the installation box to float along the direction of the water flow, so that the escape rope is inclined in the water, and under the action of the anti-loosening mechanism, it can ensure that the escape rope is always in In a taut state; the deflection angle of the escape rope relative to the water surface is detected by an angle sensor, and the length of the escape rope unwound from the winding roller is detected by a displacement sensor, so that the vertical distance between the installation box and the top of the vertical pole can be calculated, and then the instantaneous water level depth of the water surface at this time can be obtained by adding the distance to the water level depth corresponding to the top of the vertical pole. Real-time water level depth detection data can be continuously provided after the water level exceeds the predetermined monitoring height during the flood season, especially at key flood control points. The online monitoring alarm device of the present application is set at a fixed point, which can continuously provide effective water level data in the follow-up of the flood situation;

[0039] 2. A torque sensor is arranged on the output end of the rotating drive component, the torque sensor is connected to the central processing unit, and a torque threshold is set. The torque sensor detects the traction torque of the winding roller from the escape rope. When the traction torque is detected to be less than the minimum value of the torque threshold, it means that the escape rope is loose, and the central processing unit controls the rotating drive component to rotate forward to make the winding roller reel up the escape rope; when the traction torque is detected to be greater than the maximum value of the torque threshold, it means that the escape rope is too tight and the installation box is at risk of sinking into the water, and the central processing unit controls the rotating drive component to reverse to make the winding roller unwind the escape rope, thereby ensuring that the escape rope can be in a taut state before monitoring flood information, so as to improve the accuracy of the detection structure;

[0040] 3. First, use the rotating drive to drive the winding roller to reel in the escape rope and keep the escape rope in a taut state. The angle of the escape rope at this time is measured by the angle sensor. The total length of the escape rope unwound at this time is calculated based on the data recorded by the displacement sensor, and the horizontal offset displacement of the installation box relative to the vertical pole at this time can be calculated; then quickly rotate the winding roller in the opposite direction for a set number of turns, so that the installation box moves under the impact of the water flow and autonomously pulls the escape rope into a taut state. The timer records the length of time the escape rope is in the taut state, and then uses the angle sensor and the displacement sensor to calculate the horizontal offset displacement of the installation box relative to the vertical pole at this time, and the horizontal displacement of the installation box can be obtained. From this, the flow velocity of the installation box under the impact of the water flow can be calculated, which can provide a reference value for the water flow velocity. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0042] Figure 2 It is a structural schematic diagram of another perspective of an embodiment of the present application;

[0043] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present application;

[0044] Figure 4 is a schematic diagram of calculating the instantaneous water level depth after the water surface submerges the vertical pole in the embodiment of the present application;

[0045] Figure 5 yes Figure 3 A partial enlarged schematic diagram of part A;

[0046] Figure 6 yes Figure 3 A partial enlarged schematic diagram of part B.

[0047] Description of reference numerals:

[0048] 1. Pole; 11. Water level sensor; 12. Warning device;

[0049] 2. Installation box; 21. Airbag; 22. Automatic inflation mechanism; 23. Installation sleeve;

[0050] 31. Winding roller; 32. Escape rope; 33. Rotating drive member;

[0051] 4. Watertight compartment; 41. Displacement sensor; 42. Angle sensor; 43. Upper perforation; 44. Protective cover;

[0052] 51. Support frame; 52. Guide ball; 521. Guide hole; 53. Steering shaft;

[0053] 6. Oil seal box; 61. Lower through hole; 62. Solid grease layer; 63. Sealing element; 631. Through hole; 64. Oil push plate; 65. Elastic element. DETAILED DESCRIPTION

[0054] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0055] The present application embodiment discloses a water conservancy flood automatic online monitoring alarm device. Figure 1 , Figure 2 and Figure 3 It includes a pole 1, a water level sensor 11, a central processing unit, a warning device 12 and a communication module. The communication module is used to send out the flood information processed by the central processing unit. The top of the pole 1 is movably connected to a mounting box 2. The water level sensor 11, the warning device 12 and the communication module are all sealed in the mounting box 2. The water level sensor 11 can specifically be a non-contact ultrasonic water level sensor, an infrared water level sensor or a radar water level sensor, and its detection end extends from the mounting box 2; the warning device 12 is an audible and visual alarm, and the mounting box 2 has an area for sound and light to be transmitted.

[0056] A winding roller 31 is rotatably arranged inside the upright pole 1, and an escape rope 32 is wound on the winding roller 31. The free end of the escape rope 32 is fixedly connected to the installation box 2. The escape rope 32 can be a braided rope or a steel rope with high tensile strength.

[0057] An air bag 21 and an automatic inflation mechanism 22 for filling gas into the air bag 21 when the water level is above the top of the vertical pole 1 are arranged around the bottom of the installation box 2. After the air bag 21 is inflated, the buoyancy in the water is greater than the overall gravity of the installation box 2, so that after the water level is above the top of the vertical pole 1, the air bag 21 can effectively support the installation box 2 and the components thereon.

[0058] Reference Figure 3 , Figure 5 and Figure 6 A watertight compartment 4 is arranged in the vertical pole 1, and a displacement sensor 41 for detecting the unwinding length of the escape rope 32 on the winding roller 31 and an angle sensor 42 for detecting the swinging angle of the escape rope 32 are arranged in the watertight compartment 4, and both the displacement sensor 41 and the angle sensor 42 are connected to the central processing unit; and, an anti-loosening mechanism is arranged in the watertight compartment 4 for ensuring that the escape rope 32 unwound from the winding roller 31 remains in a taut state.

[0059] The central processing unit is configured to calculate the instantaneous water level depth according to the values ​​detected by the displacement sensor 41 and the angle sensor 42 .

[0060] Specifically, refer to Figure 4 , the instantaneous water level depth is calculated as:

[0061] L = l0 + Sinθ·l';

[0062] in,

[0063] L——instantaneous water level depth;

[0064] l0——the depth of water level indicated by the top of the vertical pole 1;

[0065] θ——the deflection angle of the escape rope 32 relative to the water surface, detected by the angle sensor 42;

[0066] l′——the length of the escape rope 32 unwound from the winding roller 31 , detected by the displacement sensor 41 .

[0067] In this way, in the early stage of a flood, when the water level rises within the normal water level range, the water level sensor 11 on the installation box 2 can monitor the water level in real time, and when the corresponding warning value is reached, the central processor controls the warning device 12 to sound an alarm; and once the water level rises to the top of the vertical pole 1, the automatic inflation mechanism 22 is triggered and gas is filled into the airbag 21, so that the airbag 21 can drive the installation box 2 to float on the water surface, thereby ensuring the safety of each electronic component in the installation box 2 to ensure that it can continue to work normally.

[0068] As the water level continues to rise, driven by the buoyancy of the airbag 21, the installation box 2 escapes and floats from the top of the pole 1, pulling the escape rope 32 and unwinding the winding roller 31; under the impact of the water flow, the airbag 21 drives the installation box 2 to float along the direction of the water flow, so that the escape rope 32 is inclined in the water, and under the action of the anti-loosening mechanism, it can be ensured that the escape rope 32 is always in a taut state; therefore, the deflection angle of the escape rope 32 relative to the water surface is detected by the angle sensor 42, and the length of the escape rope 32 unwound from the winding roller 31 is detected by the displacement sensor 41, and the vertical distance of the installation box 2 from the top of the pole 1 at this time can be calculated, and then added to the water level depth corresponding to the top of the pole 1, the instantaneous water level depth of the water surface at this time can be obtained, and real-time water level depth detection data can continue to be provided after the water level exceeds the predetermined monitoring height during the flood season, especially at key flood control points, the online monitoring and alarm device of the present application is set at a fixed point, which can continue to provide effective water level data in the subsequent flood situation.

[0069] And after optimizing the power configuration in the installation box 2, for example, automatically starting the built-in power supply in the installation box 2 after the installation box 2 escapes, such as a lithium battery or other new type of battery with light weight and high energy density, after turning off the water level sensor 11 and the warning device 12, it can also support the low-energy central processing unit and the communication module to continue to work for a certain period of time, so that the online monitoring alarm device of the present application can output more useful data information. Correspondingly, a built-in power supply for powering electronic components such as the angle sensor 42 and the displacement sensor 41 is also provided in the watertight compartment 4 in the vertical pole 1.

[0070] In order to provide more flood information, such as water flow speed, etc., refer to Figure 3 , Figure 5 and Figure 6 Furthermore, a timer and a rotary drive member 33 for driving the winding roller 31 to rotate are arranged in the watertight compartment 4, and both the rotary drive member 33 and the timer are connected to the central processing unit. Specifically, the rotary drive member 33 is configured as a servo motor with a self-locking mechanism, and a torque sensor is provided on the output end of the rotary drive member 33 to detect the tension state of the escape rope 32 on the winding roller 31. Specifically, the torque sensor is connected to the central processing unit, and a torque threshold is set. The torque sensor detects the traction torque of the winding roller 31 from the escape rope 32. When it is detected that the traction torque is less than the minimum value of the torque threshold, it means that the escape rope 32 is loose, and the central processing unit controls the rotary drive member 33 to rotate forward so that the winding roller 31 reels the escape rope 32; when it is detected that the traction torque is greater than the maximum value of the torque threshold, it means that the escape rope 32 is overly tight and the installation box 2 is at risk of sinking into the water, the central processing unit controls the rotary drive member 33 to reverse so that the winding roller 31 unwinds the escape rope 32, thereby realizing the function of the above-mentioned anti-loosening mechanism.

[0071] The central processing unit is configured to control the rotary drive member 33 to drive the winding roller 31 to wind up the escape rope 32 to a certain length, and then release the winding roller 31 to calculate the flow speed of the airbag 21 driven by the water flow as a reference value of the water flow speed.

[0072] The flow velocity of the airbag 21 under the impact of water flow is calculated as follows:

[0073]

[0074] in,

[0075] V——the flow velocity of the airbag 21 under the impact of water flow;

[0076] l n+1 ——The length of the escape rope 32 unwound from the reel 31 when the counter stops timing is detected by the displacement sensor 41;

[0077] θ n+1 - the deflection angle of the escape rope 32 relative to the water surface when the counter stops timing, detected by the angle sensor 42;

[0078] l n ——The length of the escape rope 32 unwound from the reel 31 when the counter starts timing, detected by the displacement sensor 41;

[0079] θ n - the deflection angle of the escape rope 32 relative to the water surface when the counter starts timing, detected by the angle sensor 42;

[0080] t——The duration from the start to the end of the counter.

[0081] Accordingly, under the action of the anti-loosening mechanism, through the control of the central controller on the rotating drive member 33, when it is necessary to detect flood data, according to the torque sensor's detection of the torque of the winding roller 31 under the pulling of the escape rope 32, the rotating drive member 33 can be timely controlled to drive the winding roller 31 to rotate forward or reverse, so that the escape rope 32 enters a taut state. Then the instantaneous water level depth and the flow speed of the airbag 21 and the installation box 2 under the impact of the water flow can be monitored. By detecting the flow speed of the installation box 2 floating on the water surface under the impact of the water flow, the water flow speed can be reflected. Specifically, the winding roller 31 is driven by the rotating drive member 33 to reel in the escape rope 32, and the escape rope 32 is kept in a taut state. The angle of the escape rope 32 at this time is measured by the angle sensor 42, and the total length of the escape rope 32 unwound at this time is inferred according to the data recorded by the displacement sensor 41. The installation box 2 at this time can be calculated. 2 relative to the vertical pole 1; then the winding roller 31 is quickly rotated in the reverse direction for a set number of turns, so that the installation box 2 moves under the impact of the water flow and autonomously pulls the escape rope 32 into a taut state, and the timer records the time for the escape rope 32 to enter the taut state, and then the horizontal displacement of the installation box 2 relative to the vertical pole 1 is calculated with the help of the angle sensor 42 and the displacement sensor 41, so that the horizontal displacement of the installation box 2 can be obtained, thereby the flow speed of the installation box 2 under the impact of the water flow can be calculated, which can provide a reference value for the water flow speed.

[0082] Of course, it is also possible to directly install a flow meter on the installation box 2 to directly measure the water flow velocity, but it is necessary to consider the problem of limited detection accuracy caused by the fluctuation of the installation box 2 on the water surface due to the impact of the water flow, as well as the installation cost.

[0083] For specific settings, refer to Figure 3 , Figure 5 and Figure 6In order to ensure the working life of various electronic components arranged in the watertight compartment 4 of the vertical pole 1, an upper through hole 43 for the escape rope 32 to pass through is opened on the top of the watertight compartment 4, and a support frame 51 is installed on the top of the watertight compartment 4; a guide ball 52 is rotatably installed on the support frame 51, and a steering shaft 53 is fixedly connected to two radially opposite outer walls of the guide ball 52. The two steering shafts 53 are connected through the center of the guide ball 52. The guide ball 52 is rotatably installed on the support frame 51 through the steering shaft 53, and the angle sensor 42 is installed on the support frame 51 and is used to detect the flip angle of the steering shaft 53 on the vertical plane; and considering the diversity of water flow directions, the support frame 51 is rotatably installed on the top of the watertight compartment 4, and the rotation axis is orthogonal to the steering shaft 53, thereby realizing the 360° omnidirectional rotation performance of the guide ball 52 on the top of the watertight compartment 4 with the water flow. If necessary, another angle sensor 42 can be added in the watertight compartment 4 to monitor the horizontal steering angle of the support frame 51 to indicate the water flow direction. Furthermore, a protective cover 44 may be further installed on the watertight compartment 4 and arranged around the supporting frame 51 to reduce the interference of water flow impact on the supporting frame 51 and the guide ball 52 .

[0084] A guide hole 521 is formed on the guide ball 52 along its diameter. The extension direction of the guide hole 521 is perpendicular to the extension direction of the steering shaft 53. The escape rope 32 passes through the guide hole 521 after passing through the upper through hole 43. The diameter of the guide hole 521 is slightly larger than the outer diameter of the escape rope 32. In the initial state, the guide hole 521 is vertically aligned with the upper through hole 43. It should also be clearly stated that the winding roller 31 and the rotating drive member 33 are also arranged in the watertight compartment 4.

[0085] An oil seal box 6 is fixedly connected to the top wall of the watertight compartment 4, and a lower through hole 61 corresponding to the upper through hole 43 is opened on the bottom wall of the oil seal box 6. The oil seal box 6 is filled with a hydrophobic solid grease layer 62. The upper through hole 43 and the lower through hole 61 are both adapted to the escape rope 32. After the winding roller 31 unwinds the escape rope 32, it first passes through the lower through hole 61 and then through the upper through hole 43.

[0086] The top wall and the bottom wall of the oil seal box 6 are filled with a seal 63 covering the upper perforation 43 and the lower perforation 61. The seal 63 is penetrated by a through hole 631 for the escape rope 32 to pass through. The aperture of the through hole 631 is smaller than the outer diameter of the escape rope 32. The seal 63 can be a combination of one or more of oil-absorbing felt, sealing rubber, etc. In the present embodiment, the seal 63 is configured as a laminated layer of an oil-absorbing felt layer and a sealing rubber layer, and the oil-absorbing felt layer is located on the side of the sealing rubber layer close to the solid grease layer 62.

[0087] Therefore, when the escape rope 32 is being wound up or unwound, it needs to pass through two layers of sealing members 63 and the solid grease layer 62 therebetween. The oil-absorbing felt layer helps to wipe off the excess solid grease adhering to the outer wall of the escape rope 32, so as to reduce the loss of the escape rope 32 each time it enters and exits the watertight compartment 4. The sealing rubber layer can further isolate external debris from entering the oil seal box 6 along with the escape rope 32, and improve the sealing performance, thereby suppressing the influence of high water pressure on the waterproof performance of the oil-absorbing felt layer, thereby ensuring the waterproof performance of the watertight compartment 4 as much as possible and ensuring the normal and effective operation of each electronic component inside.

[0088] After the escape rope 32 passes through the watertight compartment 4, it directly passes through the guide hole 521 on the guide ball 52. When the installation box 2 on the water surface moves under the impact of the water flow, the anti-loosening mechanism always controls the escape rope 32 to be in a taut state. Therefore, the taut escape rope 32 can drive the guide ball 52 to swing to the corresponding inclination angle on the support frame 51 following its tilted posture, and drive the support frame 51 to rotate on the watertight compartment 4 to the direction corresponding to the water flow direction, thereby facilitating the central processor to calculate the required flood information in combination with the detection data of each sensor.

[0089] In addition, the escape rope 32 will always carry and consume a portion of the solid grease in the process of reciprocating through the oil seal box 6, and an inherent channel will also be formed in the middle of the solid grease layer 62 for the escape rope 32 to pass through. Especially when the escape rope 32 passes through the solid grease layer 62 at high speed, this passage is extremely obvious, so that the outer wall of the escape rope 32 is often unable to be fully filled with solid grease, so that the upper perforation 43 may fail to be watertight.

[0090] For this purpose, refer to Figure 3 and Figure 6 An oil-pushing plate 64 is slidably disposed on the side wall of the oil-sealing box 6. An elastic member 65 is disposed on the side of the oil-pushing plate 64 that is away from the solid grease layer 62 and that contacts the inner wall of the oil-sealing box 6. The elastic member 65 is specifically a plurality of springs. The moving direction of the oil-pushing plate 64 under the deformation force of the elastic member 65 is orthogonal to the trajectory of the escape rope 32 in the oil-sealing box 6. Thus, the solid grease layer 62 can be always squeezed by the oil-pushing plate 64 by means of the deformation force of the elastic member 65, ensuring that the escape rope 32 is always wrapped by the solid grease. Regardless of the speed at which the escape rope 32 passes through the oil-sealing box 6, a sufficient amount of solid grease can be ensured to be blocked near the upper perforation 43 to provide waterproof performance.

[0091] In addition, refer to Figure 2The automatic inflation mechanism 22 includes a chemical gas generator disposed on the mounting box 2. The gas outlet of the chemical gas generator is connected to a one-way valve and communicates with the airbag 21. The chemical gas generator is connected to the central processing unit. The chemical gas generator is electrically triggered, and specifically can be a sodium azide gas generator, which can release a large amount of nitrogen when triggered. The central processing unit is configured to control the chemical gas generator to work when the water level sensor 11 detects that the water level is close to the top of the top rod. And the bottom of the mounting box 2 is fixedly connected to a mounting sleeve 23 that is sleeved on the outside of the top of the vertical pole 1.

[0092] The implementation principle of the automatic online monitoring and alarm device for water conservancy flood situation in the embodiment of the present application is as follows:

[0093] When the water level in the flood area rises to the top of the pole 1, the automatic inflation mechanism 22 is triggered and fills the airbag 21 with gas, so that the airbag 21 can drive the installation box 2 to float on the water surface, which can ensure the safety of the electronic components in the installation box 2 and ensure that they can continue to work normally. As the water level continues to rise, driven by the buoyancy of the airbag 21, the installation box 2 escapes from the top of the pole 1 and floats, pulling the escape rope 32 and unwinding the winding roller 31; under the impact of the water flow, the airbag 21 drives the installation box 2 to float along the direction of the water flow, so that the escape rope 32 is tilted in the water, and under the action of the anti-loosening mechanism, it can ensure that the escape rope 32 is always in a taut state.

[0094] At this time, the deflection angle of the escape rope 32 relative to the water surface is detected by the angle sensor 42, and the length of the escape rope 32 unwound from the winding roller 31 is detected by the displacement sensor 41. The vertical distance between the installation box 2 and the top of the vertical pole 1 at this time can be calculated, and then added to the water level depth corresponding to the top of the vertical pole 1 to obtain the instantaneous water level depth of the water surface at this time. Real-time water level depth detection data can continue to be provided after the water level exceeds the predetermined monitoring height during the flood season, especially at key flood prevention points. The online monitoring and alarm device of the present application is set at a fixed point to continuously provide effective water level data in the follow-up of the flood situation.

[0095] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0096] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic online monitoring and alarm device for water conservancy flood conditions, comprising a pole (1), a water level sensor (11), a central processing unit, a warning device (12) and a communication module, wherein the communication module is used to send out flood information processed by the central processing unit, and is characterized in that: The top of the vertical pole (1) is movably connected to a mounting box (2); the water level sensor (11), the warning device (12) and the communication module are all sealed and arranged in the mounting box (2); a winding roller (31) is rotatably arranged in the vertical pole (1); an escape rope (32) is wound on the winding roller (31); and the free end of the escape rope (32) is fixedly connected to the mounting box (2); An air bag (21) and an automatic inflation mechanism (22) for inflating gas into the air bag (21) are arranged around the bottom of the installation box (2) and when the water level is above the top of the vertical pole (1), the buoyancy of the air bag (21) in water after inflation is greater than the overall weight of the installation box (2); A watertight compartment (4) is provided in the vertical pole (1), and a displacement sensor (41) for detecting the unwinding length of the escape rope (32) on the winding roller (31) and an angle sensor (42) for detecting the swinging angle of the escape rope (32) are provided in the watertight compartment (4), and both the displacement sensor (41) and the angle sensor (42) are connected to the central processing unit; The central processor is configured to calculate the instantaneous water level depth according to the values ​​detected by the displacement sensor (41) and the angle sensor (42).

2. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 1 is characterized in that: The instantaneous water level depth is calculated as follows: ； in, ——the instantaneous water level depth; - the water level indicated by the top of the vertical pole (1); - the deflection angle of the escape rope (32) relative to the water surface is detected by the angle sensor (42); - The length of the escape rope (32) unwound from the reel (31) is detected by the displacement sensor (41).

3. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 1 is characterized in that: The watertight compartment (4) is provided with a timer and a rotary drive member (33) for driving the winding roller (31) to rotate, and the rotary drive member (33) and the timer are both connected to the central processing unit; The central processing unit is configured to control the rotary drive member (33) to drive the reel (31) to reel in the escape rope (32) to a certain length, and then release the reel (31) to calculate the flow speed of the airbag (21) driven by the water flow, so as to serve as a reference value for the water flow speed.

4. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 3 is characterized in that: The flow velocity of the airbag (21) under the impact of water flow is calculated as follows: ； in, V is the flow velocity of the airbag (21) under the impact of water flow; - the length of the escape rope (32) unwound from the reel (31) when the timer stops timing, detected by the displacement sensor (41); - the deflection angle of the escape rope (32) relative to the water surface when the timer stops timing, detected by the angle sensor (42); - the length of the escape rope (32) unwound from the reel (31) when the timer starts timing, detected by the displacement sensor (41); - the deflection angle of the escape rope (32) relative to the water surface when the timer starts timing, detected by the angle sensor (42); t——the duration from the start to the end of the timer.

5. The automatic online monitoring and alarm device for water conservancy flood conditions according to any one of claims 1 to 4, characterized in that: An upper through hole (43) for the escape rope (32) to pass through is provided on the top of the watertight compartment (4), a support frame (51) is installed on the top of the watertight compartment (4), a guide ball (52) is rotatably installed on the support frame (51), a steering shaft (53) is fixedly connected to two radially opposite outer walls of the guide ball (52), a line connecting the two steering shafts (53) passes through the center of the guide ball (52), the guide ball (52) is rotatably installed on the support frame (51) through the steering shaft (53), and the angle sensor (42) is installed on the support frame (51) and is used to detect the turning angle of the steering shaft (53); The guide ball (52) is provided with a guide hole (521) extending along the diameter direction thereof. The extension direction of the guide hole (521) is perpendicular to the extension direction of the steering shaft (53). The escape rope (32) passes through the guide hole (521) after passing through the upper through hole (43). In an initial state, the guide hole (521) is vertically aligned with the upper through hole (43).

6. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 5 is characterized in that: An oil seal box (6) is fixedly connected to the top wall of the watertight compartment (4); a lower through hole (61) corresponding to the upper through hole (43) is formed on the bottom wall of the oil seal box (6); a hydrophobic solid grease layer (62) is filled in the oil seal box (6); the upper through hole (43) and the lower through hole (61) are both adapted to the escape rope (32); after the escape rope (32) is unwound by the winding roller (31), the winding rope first passes through the lower through hole (61) and then passes through the upper through hole (43).

7. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 6 is characterized in that: The top wall and the bottom wall of the oil seal box (6) are filled with a sealing member (63) covering the upper through hole (43) and the lower through hole (61), and the sealing member (63) is provided with a through hole (631) for the escape rope (32) to pass through, and the diameter of the through hole (631) is smaller than the outer diameter of the escape rope (32).

8. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 7 is characterized in that: An oil pushing plate (64) is slidably provided on the side wall of the oil seal box (6); an elastic member (65) is provided on the side of the oil pushing plate (64) facing away from the solid grease layer (62) and contacts the inner wall of the oil seal box (6); the movement direction of the oil pushing plate (64) under the action of the deformation force of the elastic member (65) is orthogonal to the travel trajectory of the escape rope (32) in the oil seal box (6).

9. The automatic online monitoring and alarm device for water conservancy flood conditions according to any one of claims 1 to 4, characterized in that: The automatic inflation mechanism (22) comprises a chemical gas generator arranged on the installation box (2), the gas outlet of the chemical gas generator is connected to a one-way valve and communicates with the airbag (21), and the chemical gas generator is connected to the central processing unit; The central processing unit is configured to control the chemical gas generator to operate when the water level sensor (11) detects that the water level is close to the top of the vertical pole (1).

10. The automatic online monitoring and alarm device for water conservancy flood conditions according to claim 9 is characterized in that: The bottom of the installation box (2) is fixedly connected with an installation sleeve (23) sleeved on the outside of the top of the vertical pole (1).

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