Water conservancy irrigation filtering device

Abstract

The invention belongs to the technical field of separation devices, and particularly relates to a water conservancy irrigation filtering device which comprises a tank body, a water inlet pipe and a water outlet pipe which are arranged at the two ends of the tank body, a first supporting plate and a transmission shaft which is fixedly arranged in the tank body and transversely and rotationally arranged in the middle of the first supporting plate, the extrusion force between the cleaning brush and the filter screen can be self-adaptively adjusted through the water impact pressure detection mechanism according to the water flow impact force, abrasion of the cleaning brush and the filter screen is reduced, the service life of equipment is prolonged, and constant cleaning rotating speed is guaranteed; meanwhile, when the impact force of the water flow adjusting mechanism is too large, the water flow impact force is reduced by adjusting the water inflow, and stable operation of the device is guaranteed; besides, the abrasion degree detection mechanism can accurately detect the abrasion degree of the cleaning brush and remind a user to replace the seriously-abraded brush, and normal operation and a good filtering effect of the water conservancy irrigation filtering device are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of separation devices, and particularly relates to a water conservancy irrigation filtering device. Background Art

[0002] Currently, in the field of water conservancy irrigation today, irrigation water usually contains sediment, weeds, algae, microorganisms, and other impurities. The existing water conservancy irrigation filtering devices on the market generally use a filter screen as the core filtering component. The filter screen can effectively intercept various impurities in the water and ensure the cleanliness of the irrigation water. For example, the publication number: CN119258642A discloses a filtering device for water conservancy irrigation. In order to maintain the filtering performance of the filter screen and avoid blockage caused by impurity accumulation, most devices select a cleaning brush as the key component for dredging the filter screen.

[0003] However, during actual use, when water flows through the inside of the filtering device, a certain water flow impact force will be generated. With the expansion of the scale of the irrigation system or the influence of factors such as unstable water source water pressure, the water flow impact force often gradually increases, which will directly act on the cleaning brush, resulting in a corresponding increase in the extrusion pressure between the cleaning brush and the filter screen. The excessive extrusion pressure exacerbates the frictional wear of the cleaning brush, and the bristles of the cleaning brush are prone to wear, bending, or even breakage, thus greatly shortening the service life of the cleaning brush, increasing the frequency and cost of replacing the cleaning brush. Moreover, the large extrusion pressure will also cause problems such as deformation, enlarged mesh holes, or rupture of the filter screen. Once the filter screen is damaged, its filtering effect will be greatly reduced, and it cannot effectively intercept impurities in the water, thereby affecting the normal operation of the entire irrigation system.

[0004] Therefore, a water conservancy irrigation filtering device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems and provide a water conservancy irrigation filtering device.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A water conservancy irrigation filtering device includes a tank body, and a water inlet pipe and a water outlet pipe provided at both ends of the tank body. A filter screen is fixedly provided inside the tank body, and further includes: A first support plate, fixedly provided inside the tank body. A transmission shaft is horizontally rotatably provided in the middle of the first support plate. One end of the transmission shaft is fixedly provided with a cleaning brush in contact with the side surface of the filter screen, and a driving mechanism is provided at the other end of the rotating shaft; A water impact pressure detection mechanism, provided on the shaft wall of the transmission shaft, and the water impact pressure detection mechanism is used to detect the extrusion pressure between the cleaning brush and the filter screen; A water flow regulating mechanism is arranged inside one end of the tank body, and is close to the position of the water inlet pipe; A wear degree detecting mechanism is arranged inside the tank body. The wear degree detecting mechanism is located on one side of the filter screen and is fixedly connected to one end of the transmission shaft. The wear degree detecting mechanism is used for detecting the wear degree of the cleaning brush; A support is fixedly arranged at the bottom of the tank body. A PLC controller is fixedly arranged on the side wall of the support. The driving mechanism, the water impact pressure detecting mechanism, the water flow regulating mechanism and the wear degree detecting mechanism are all electrically connected to the PLC controller.

[0007] Preferably, the driving mechanism includes a driving motor fixedly arranged at the top of the tank body. The output end of the driving motor is fixedly provided with a driving shaft. The lower end of the driving shaft extends into the tank body and is fixedly provided with a first bevel gear. One end of the transmission shaft is fixedly provided with a second bevel gear meshed with the first bevel gear.

[0008] Preferably, the water impact pressure detecting mechanism includes a first shell located inside the tank body. One side of the first shell is fixedly connected to the side surface of the first support plate. The transmission shaft includes a rotating shaft and a sliding shaft. The shaft wall of the rotating shaft is rotationally connected to one side of the first shell. The shaft wall of the sliding shaft is slidably connected to the other side of the first shell. A same square telescopic rod is fixedly arranged between the opposite ends of the rotating shaft and the sliding shaft. The opposite ends of the rotating shaft and the sliding shaft are respectively fixedly connected to the second bevel gear and the cleaning brush. One end of the sliding shaft located inside the first shell is fixedly provided with a fixed disk. Two electromagnetic telescopic rods are symmetrically and fixedly arranged between the fixed disk and the inner wall of the first shell.

[0009] Preferably, the electromagnetic telescopic rod includes a telescopic sleeve fixedly arranged on the inner wall of the first shell. An expansion and contraction moving rod is arranged inside the telescopic sleeve. An electromagnet block is fixedly arranged on the inner wall of the telescopic sleeve. One end of the expansion and contraction moving rod located inside the telescopic sleeve is fixedly provided with a permanent magnet block. A spring is fixedly arranged between the permanent magnet block and the electromagnet block. An extrusion block is fixedly arranged on the rod wall of the expansion and contraction moving rod. A sliding groove matched with the extrusion block is arranged on the inner wall of the telescopic sleeve. An elastic telescopic rod is fixedly arranged on one side of the sliding groove. One end of the elastic telescopic rod is fixedly provided with an anti-interference type pressure sensor in contact with the extrusion block.

[0010] Preferably, the water flow regulating mechanism includes two regulating plates symmetrically arranged inside the tank body. The sides of the two regulating plates are in sliding contact with the inner wall of one end of the tank body, and the two regulating plates are located on both sides of the water inlet pipe. Brackets are fixedly arranged on the outer walls of both sides of the tank body, electric push rods are fixedly arranged inside both brackets, the moving ends of the two electric push rods are fixedly provided with regulating rods extending into the tank body, and one ends of the two regulating rods are respectively fixedly connected to the side walls of the two regulating plates.

[0011] Preferably, sliders are arranged at the top and bottom of the two regulating plates. Two sliding rods are symmetrically arranged inside the tank body. Both ends of the two sliding rods are fixedly connected to the inner walls of both sides of the tank body. The top and bottom sliders are respectively slidably connected to the rod walls of the two sliding rods.

[0012] Preferably, the wear degree detection mechanism includes a second housing located inside the tank body. Second support plates are fixedly arranged at the top and bottom of the second housing. One ends of the two second support plates away from the second housing are slidably connected to the strip-shaped grooves on the inner wall of the tank body. A torque sensor is fixedly arranged on the inner side wall of the second housing, and the rotating part of the torque sensor is fixedly connected to one end of the sliding shaft.

[0013] Preferably, the cleaning brush is of a three-blade type, the cleaning brush is made of nylon brush, and the filter screen is of a disc-shaped mesh body.

[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By setting the water impact pressure detection mechanism, when the impact force of irrigation water acts on the cleaning brush, the anti-interference pressure sensor can detect the magnitude of the impact force and feedback the signal to the PLC controller, and then control the electromagnet to generate a magnetic adsorption force, driving the cleaning brush to move reversely against the water flow impact force, adaptively adjusting the extrusion force between the cleaning brush and the filter screen, effectively reducing the wear of both, extending the service life of the equipment, and at the same time ensuring that the surface of the filter screen is cleaned at a constant speed during cleaning.

[0015] 2. By setting the water flow regulating mechanism, the water flow regulating mechanism can play a role when the impact force of irrigation water is relatively large. When the anti-interference pressure sensor detects that the pressure value reaches the preset threshold, the PLC controller starts the electric push rod to push the regulating plate to block the opening of the water inlet pipe, reduce the water inflow, slow down the water flow rate, weaken the impact force, and reduce the impact on the filter screen and the cleaning brush, further ensuring the stable operation of the device and maintaining a constant rotation speed during cleaning.

[0016] 3. Through the provided wear detection mechanism, the wear detection mechanism utilizes the strain gauge principle and can accurately calculate the resistance values of the cleaning brush and the sliding shaft by detecting the change in the resistance value of the strain gauge caused by the change in the rotation speed of the sliding shaft. When the preset threshold value inside the PLC controller is reached, the PLC controller activates the alarm to remind the water conservancy workers to replace the severely worn cleaning brush in a timely manner, ensuring the normal operation and filtering effect of the water conservancy irrigation filtering device. Brief Description of the Drawings

[0017] Figure 1 is a three-dimensional view of a water conservancy irrigation filtering device provided by the present invention; Figure 2 is a three-dimensional view of a partially cut-open water conservancy irrigation filtering device provided by the present invention; Figure 3 is a three-dimensional view of a water impact pressure detection mechanism of a water conservancy irrigation filtering device provided by the present invention; Figure 4 is a three-dimensional view of an electromagnetic telescopic rod of a water conservancy irrigation filtering device provided by the present invention; Figure 5 is a three-dimensional view of a water flow regulating mechanism of a water conservancy irrigation filtering device provided by the present invention; Figure 6 is a partial three-dimensional view of one side of a filter screen of a water conservancy irrigation filtering device provided by the present invention; Figure 7 is a three-dimensional view of a wear detection mechanism of a water conservancy irrigation filtering device provided by the present invention.

[0018] In the figure: 1 tank body, 2 water inlet pipe, 3 water outlet pipe, 4 filter screen, 5 first support plate, 6 transmission shaft, 7 cleaning brush, 8 driving mechanism, 81 driving motor, 82 driving shaft, 83 first bevel gear, 84 second bevel gear, 9 water impact pressure detection mechanism, 91 first housing, 92 rotating shaft, 93 sliding shaft, 94 square telescopic rod, 95 fixed disk, 96 electromagnetic telescopic rod, 10 water flow regulating mechanism, 101 adjusting plate, 102 support, 103 electric push rod, 104 adjusting rod, 105 slider, 106 slide bar, 11 wear detection mechanism, 111 second housing, 112 second support plate, 113 torque sensor, 12 support, 13 PLC controller, 14 telescopic sleeve, 15 telescopic moving rod, 16 electromagnet block, 17 permanent magnet block, 18 spring, 19 extrusion block, 20 elastic telescopic rod, 21 anti-interference pressure sensor. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] As shown Figures 1-7 in the figure, a water conservancy irrigation filtering device includes a tank body 1, and a water inlet pipe 2 and a water outlet pipe 3 arranged at both ends of the tank body 1. A filter screen 4 is fixedly arranged inside the tank body 1. The filter screen 4 adopts a disc-shaped mesh body. A sealing door panel is hinged on the side wall of the tank body 1, and a rubber sealing ring is arranged on the side wall of the sealing door panel for sealing, which can ensure the waterproof seal between the sealing door panel and the tank body 1. When it is necessary to clean and repair the inside of the tank body 1, just open the sealing door panel. It also includes: A first support plate 5 is fixedly arranged inside the tank body 1. A transmission shaft 6 is horizontally rotatably arranged in the middle of the first support plate 5. One end of the transmission shaft 6 is fixedly provided with a cleaning brush 7 that contacts the side of the filter screen 4. The cleaning brush 7 adopts a three-blade type. The cleaning brush 7 adopts a nylon brush. Nylon material is not easy to fall off and has a good cleaning effect. The three blades of the cleaning brush 7 are fixed to the transmission shaft 6 by bolts. When it is necessary to replace the cleaning brush 7, it can be disassembled by a wrench. And the other end of the rotating shaft is provided with a driving mechanism 8. The driving mechanism 8 includes a driving motor 81 fixedly arranged on the top of the tank body 1. The output end of the driving motor 81 is fixedly provided with a driving shaft 82. The lower end of the driving shaft 82 extends into the tank body 1 and is fixedly provided with a first bevel gear 83. One end of the transmission shaft 6 is fixedly provided with a second bevel gear 84 that meshes with the first bevel gear 83. After the driving motor 81 operates, it drives the driving shaft 82 to rotate synchronously. The rotation of the driving shaft 82 further drives the first bevel gear 83 and the second bevel gear 84 connected to it. Under the transmission action, the transmission shaft 6 starts to rotate, and the transmission shaft 6 can drive the cleaning brush 7 to rotate (a protective cover is arranged outside the first bevel gear 83 and the second bevel gear 84, which can prevent impurities from affecting the stable transmission of the first bevel gear 83 and the second bevel gear 84).

[0021] The water impact pressure detection mechanism 9 is arranged on the shaft wall of the transmission shaft 6, and the water impact pressure detection mechanism 9 is used to detect the extrusion pressure between the cleaning brush 7 and the filter screen 4. The water impact pressure detection mechanism 9 includes a first housing 91 inside the tank body 1, and one side of the first housing 91 is fixedly connected to the side surface of the first support plate 5. The transmission shaft 6 includes a rotating shaft 92 and a sliding shaft 93. The shaft wall of the rotating shaft 92 is rotatably connected to one side of the first housing 91, and the shaft wall of the sliding shaft 93 is slidably connected to the other side of the first housing 91. The rotating shaft 92 and the sliding shaft 93 are respectively sealed and connected to the first housing 91 through a rotary seal assembly and a sliding seal assembly. A same square telescopic rod 94 is fixedly arranged between the opposite ends of the rotating shaft 92 and the sliding shaft 93. The same square telescopic rod 94 can not only ensure that the rotating shaft 92 and the sliding shaft 93 are integrated, but also enable the rotating shaft 92 and the sliding shaft 93 to rotate synchronously. The opposite ends of the rotating shaft 92 and the sliding shaft 93 are respectively fixedly connected to the second bevel gear 84 and the cleaning brush 7. One end of the sliding shaft 93 located inside the first housing 91 is fixedly provided with a fixed disk 95. Two electromagnetic telescopic rods 96 are symmetrically and fixedly arranged between the fixed disk 95 and the inner wall of the first housing 91. The electromagnetic telescopic rod 96 includes a telescopic sleeve 14 fixedly arranged on the inner wall of the first housing 91. An elastic telescopic rod 20 is arranged on the inner wall of the telescopic sleeve 14. One end of the elastic telescopic rod 20 is fixedly provided with an anti-interference pressure sensor 21 in contact with the extrusion block 19. The elastic energy of the elastic telescopic rod 20 can help the extrusion block 19 and the anti-interference pressure sensor 21 return to the initial position when the impact force disappears or decreases. The anti-interference pressure sensor 21 is made of a semiconductor material with high purity and low impurities to make a sensitive resistor, reducing the influence of electromagnetic interference on its electrical performance.

[0022] The water flow regulating mechanism 10 is arranged inside one end of the tank body 1 and is close to the position of the water inlet pipe 2. The water flow regulating mechanism 10 includes two regulating plates 101 symmetrically arranged inside the tank body 1. The sides of the two regulating plates 101 are in sliding contact with the inner wall of one end of the tank body 1, and the two regulating plates 101 are located on both sides of the water inlet pipe 2. Brackets 102 are fixedly arranged on the outer walls of both sides of the tank body 1. Electric push rods 103 are fixedly arranged inside the two brackets 102. The moving ends of the two electric push rods 103 are fixedly provided with adjusting rods 104 extending into the tank body 1. One ends of the two adjusting rods 104 are respectively fixedly connected to the side walls of the two regulating plates 101. Sliders 105 are arranged at the top and bottom of the two regulating plates 101. Two sliding rods 106 are symmetrically arranged inside the tank body 1. The two ends of the two sliding rods 106 are fixedly connected to the inner walls of both sides of the tank body 1. The top and bottom sliders 105 are respectively in sliding connection with the rod walls of the two sliding rods 106. The sliding fit between the sliders 105 and the sliding rods 106 can increase the smoothness of the movement of the two regulating plates 101. The extension action of the electric push rod 103 drives the adjusting rod 104 to move, and then pushes the regulating plate 101 connected thereto. Under the push of the adjusting rod 104, the two regulating plates 101 move towards each other to the central position of the opening of the water inlet pipe 2, so as to realize the regulation of the water inflow and reduce the impact force of the water body.

[0023] The wear degree detection mechanism 11 is arranged inside the tank body 1. The wear degree detection mechanism 11 is located on one side of the filter screen 4 and is fixedly connected to one end of the transmission shaft 6. The wear degree detection mechanism 11 is used to detect the wear degree of the cleaning brush 7. The wear degree detection mechanism 11 includes a second housing 111 inside the tank body 1. Second support plates 112 are fixedly arranged at the top and bottom of the second housing 111. One ends of the two second support plates 112 away from the second housing 111 are in sliding connection with the strip-shaped grooves on the inner wall of the tank body 1 (not shown in the figure), which plays a role of sliding limit. In order to enable the wear degree detection mechanism 11 to move together with the cleaning brush 7, a torque sensor 113 is fixedly arranged on the inner side wall of the second housing 111. The rotating part of the torque sensor 113 is fixedly connected to one end of the sliding shaft 93. A rotating sealing assembly for rotatably connecting the sliding shaft 93 is arranged on the side wall of the second housing 111, which can ensure the sealing performance between the second housing 111 and the sliding shaft 93.

[0024] The support 12 is fixedly arranged at the bottom of the tank body 1. A PLC controller 13 is fixedly arranged on the side wall of the support 12. The driving mechanism 8, the water impact pressure detection mechanism 9, the water flow regulating mechanism 10 and the wear degree detection mechanism 11 are all electrically connected to the PLC controller 13.

[0025] The operating principle of the present invention is described as follows: First, water conservancy workers connect the irrigation pipelines to the water inlet pipe 2 and the water outlet pipe 3 respectively. During the connection process, a sealing structure is usually used for installation, such as a flange connection sealing structure, so that the irrigation water can enter the interior of the tank body 1 through the water inlet pipe 2, the impurities in the irrigation water body are filtered by the filter screen 4, and after the filtration is completed, the water is discharged through the water outlet pipe 3 and irrigated through the irrigation pipeline; During the operation of the water conservancy irrigation filtration device, water conservancy workers only need to manually operate the PLC controller 13 to start the drive motor 81. After the drive motor 81 runs, its output shaft drives the drive shaft 82 to rotate synchronously. The rotation of the drive shaft 82 further drives the first bevel gear 83 and the second bevel gear 84 connected thereto. Under the transmission action, the transmission shaft 6 starts to rotate. The end of the transmission shaft 6 is connected to the cleaning brush 7, so that the cleaning brush 7 can be driven to make a rotational movement on the surface of the filter screen 4, so that the cleaning brush 7 continuously scrapes the surface of the filter screen 4 to clean the attached impurities. The impurities cleaned down fall to the bottom of the tank body 1. After the filtration is completed, water conservancy workers can open the sealing door panel for centralized cleaning, or adopt the method of flushing the interior of the tank body 1 in one direction to discharge the impurities accumulated at the bottom of the tank body 1. Cleaning the filter screen 4 can effectively maintain a good filtration effect and ensure the stable operation of the entire water conservancy irrigation filtration system; When the irrigation water surges into the interior of the tank body 1, the impact force carried by the water flow acts on the cleaning brush 7, prompting the cleaning brush 7 to move towards the filter screen 4. The cleaning brush 7 is connected to the sliding shaft 93, and thus drives the sliding shaft 93 to move together. Since the sliding shaft 93 is connected to the rotating shaft 92 through the square telescopic rod 94, the movement of the sliding shaft 93 causes the square telescopic rod 94 to also undergo corresponding telescopic changes. During the movement of the sliding shaft 93, the fixed disk 95 fixedly connected to it also moves accordingly. The movement of the fixed disk 95 can drive the telescopic moving rod 15 to move. The telescopic moving rod 15 further pushes the extrusion block 19, and the extrusion block 19 contacts the anti-interference pressure sensor 21 and applies an external force. After the anti-interference pressure sensor 21 is subjected to the external force, it compresses the elastic telescopic push rod and generates a displacement. At this time, the anti-interference pressure sensor 21 can indirectly measure the influence degree of the water body impact force on the cleaning brush 7. The anti-interference pressure sensor 21 converts the detected pressure value into an electrical signal and feeds it back to the PLC controller 13. The PLC controller 13 turns on the power supply of the electromagnet 16 through the control circuit. After the electromagnet 16 is energized, it generates a magnetic adsorption force, which has an attracting effect on the permanent magnet 17. The permanent magnet 17 is connected to the telescopic moving rod 15. Under the action of the magnetic adsorption force, the permanent magnet 17 together with the telescopic moving rod 15 moves into the telescopic sleeve 14. At the same time, the anti-interference pressure sensor 21 always contacts the extrusion block 19 under the elastic force of the elastic telescopic rod 20, which can ensure that the pressure is always detected. This movement drives the fixed disk 95, the sliding shaft 93, and the cleaning brush 7 to move in the opposite direction against the water body impact force, reducing the extrusion force between the cleaning brush 7 and the filter screen 4, and further reducing the frictional external force between the two. Thus, it can adaptively adjust the extrusion force between the cleaning brush 7 and the filter screen 4 according to the impact force of the irrigation water, effectively reducing the wear of the cleaning brush 7 and the filter screen 4, and extending the service life of the equipment. At the same time, it can ensure that the surface of the filter screen 4 is cleaned at a constant rotational speed during cleaning. Assume that the measuring range of the anti-interference pressure sensor 21 is 0 - 5000 Pa and the accuracy is 10 Pa. When the water flow impacts the cleaning brush 7 and increases the extrusion force between the cleaning brush 7 and the filter screen 4, the anti-interference pressure sensor 21 detects a pressure change. For example, in the initial state, when cleaning normally, the detection value of the anti-interference pressure sensor 21 is 500 Pa. When the water flow impact force increases and the detection value of the anti-interference pressure sensor 21 rises to 1500 Pa, it is considered that the extrusion force exceeds the appropriate range. This pressure signal (1500 Pa) is fed back to the PLC controller 13. The PLC controller 13 has pre-stored the magnetic force setting values of the electromagnet 16 corresponding to different pressure signals. In the above example, when receiving the pressure signal of 1500 Pa, the PLC controller 13 calculates according to the built-in program that it is necessary to make the electromagnet 16 generate a magnetic force of 2 N to attract the permanent magnet 17 to drive the cleaning brush 7 to move back. This calculation may be based on the previous experimental data.The experiment found that when the electromagnetic block 16 generates a magnetic force of 2N, it can effectively reduce the extrusion force between the cleaning brush 7 and the filter screen 4, bringing it back to the appropriate range. Assume that in the experiment, when the electromagnetic block 16 generates a magnetic force of 2N, the cleaning brush 7 will move back 5mm. At this time, the extrusion force between the cleaning brush 7 and the filter screen 4 will decrease from 1500Pa to 800Pa. According to long-term experiments and actual use experience, 800Pa is determined as the appropriate pressure between the cleaning brush 7 and the filter screen 4, which can not only ensure that the cleaning brush 7 effectively cleans the filter screen 4 but also reduce the wear of both; When the impact force of the irrigation water is large and the detection pressure value that the anti-interference pressure sensor 21 can capture reaches the preset threshold inside the PLC controller 13, the PLC controller 13 will quickly respond and immediately activate the two electric push rods 103 installed on both sides at specific positions. The two electric push rods 103 extend synchronously under the command of the PLC controller 13. The front end of each electric push rod 103 is connected to the adjusting rod 104. As the electric push rod 103 extends, the adjusting rod 104 is forced to move forward, thereby pushing the connected adjusting plate 101. Under the push of the adjusting rod 104, the two adjusting plates 101 move towards the center position of the opening of the water inlet pipe 2, gradually blocking the opening of the water inlet pipe 2, so as to realize the adjustment of the water inflow. As the adjustment process continues, the distance between the two adjusting plates 101 continuously decreases, the water passing area of the water inlet pipe 2 decreases accordingly, and the flow rate of the irrigation water flowing into the tank body 1 continuously decreases. At the same time, the water flow velocity slows down and the impact force also weakens, which can significantly reduce the impact of the large impact force on the filter screen 4 and the cleaning brush 7 inside the tank body 1, ensuring the stable operation of the water conservancy irrigation filtering device. At the same time, it can ensure that the surface of the filter screen 4 is cleaned at a constant rotation speed during cleaning; When the water conservancy irrigation filtering device is in operation, the cleaning brush 7 will rotate and clean the surface of the filter screen 4. During this process, the rotation of the cleaning brush 7 drives the connected sliding shaft 93 to rotate, and the sliding shaft 93 further drives the torque sensor 113 to operate together. As the usage time increases, the cleaning brush 7 will show obvious wear. When the wear degree is relatively large, the contact force between the cleaning brush 7 and the filter screen 4 will decrease significantly, and the frictional resistance between the two will also weaken. Under the continuous drive of the drive motor 81 with a constant power, the rotation speeds of the rotating shaft 92 and the sliding shaft 93 will increase. Because the sliding shaft 93 is connected to the rotating part of the torque sensor 113, the change in the rotation speed of the sliding shaft 93 will directly drive the change in the rotation speed of the rotating part of the torque sensor 113. This torque sensor 113 works based on the strain gauge principle. When the rotation speed of the sliding shaft 93 changes, it will cause the strain gauge in the torque sensor 113 to undergo corresponding deformation. The resistance value of the strain gauge is related to the rotation speed of the sliding shaft 93. The faster the sliding shaft 93 rotates, the greater the increase in the resistance value of the strain gauge. Conversely, the smaller the increase in the resistance value. By setting a special measurement circuit at both ends of the strain gauge, the change in the resistance value of the strain gauge can be accurately measured. Based on this change in the resistance value, the torque magnitude borne by the sliding shaft 93 can be accurately calculated, and then the resistance value of the sliding shaft 93 of the cleaning brush 7 can be obtained. The torque sensor 113 outputs the detected electrical signals related to torque. These electrical signals will first undergo amplification and filtering processing, and then be sent to the PLC controller 13. Inside the PLC controller 13, a threshold value for the torque value detected by the torque sensor 113 is preset. When the detected torque value increases to this preset threshold, the PLC controller 13 will immediately activate the built-in alarm. The alarm emits a clear alarm signal to remind the water conservancy workers that the cleaning brush 7 has been severely worn and needs to be disassembled and replaced in time, so as to ensure the normal operation and filtering effect of the water conservancy irrigation filtering device.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water conservancy irrigation filtering device, comprising a tank body (1), and a water inlet pipe (2) and a water outlet pipe (3) arranged at both ends of the tank body (1). A filter screen (4) is fixedly arranged inside the tank body (1), characterized in that, It further includes: A first support plate (5), fixedly arranged inside the tank body (1). A transmission shaft (6) is horizontally rotatably arranged in the middle of the first support plate (5). One end of the transmission shaft (6) is fixedly provided with a cleaning brush (7) in contact with the side surface of the filter net (4), and a driving mechanism (8) is arranged at the other end of the rotating shaft; A water impact pressure detection mechanism (9), arranged on the shaft wall of the transmission shaft (6), and the water impact pressure detection mechanism (9) is used to detect the extrusion pressure between the cleaning brush (7) and the filter net (4); A water flow regulating mechanism (10), arranged inside one end of the tank body (1), and the water flow regulating mechanism (10) is close to the position of the water inlet pipe (2); A wear degree detection mechanism (11), arranged inside the tank body (1), the wear degree detection mechanism (11) is located on one side of the filter net (4), and the wear degree detection mechanism (11) is fixedly connected to one end of the transmission shaft (6), and the wear degree detection mechanism (11) is used to detect the wear degree of the cleaning brush (7); A support (12), fixedly arranged at the bottom of the tank body (1). A PLC controller (13) is fixedly arranged on the side wall of the support (12). The driving mechanism (8), the water impact pressure detection mechanism (9), the water flow regulating mechanism (10) and the wear degree detection mechanism (11) are all electrically connected to the PLC controller (13).

2. The water conservancy irrigation filtering device according to claim 1, characterized in that, The driving mechanism (8) includes a driving motor (81) fixedly arranged on the top of the tank body (1). The output end of the driving motor (81) is fixedly provided with a driving shaft (82). The lower end of the driving shaft (82) extends into the tank body (1) and is fixedly provided with a first bevel gear (83). One end of the transmission shaft (6) is fixedly provided with a second bevel gear (84) meshing with the first bevel gear (83).

3. The water conservancy irrigation filtering device according to claim 2, characterized in that, The water impact pressure detection mechanism (9) includes a first housing (91) inside the tank body (1), and one side of the first housing (91) is fixedly connected to the side surface of the first support plate (5). The transmission shaft (6) includes a rotating shaft (92) and a sliding shaft (93). The shaft wall of the rotating shaft (92) is rotatably connected to one side of the first housing (91). The shaft wall of the sliding shaft (93) is slidably connected to the other side of the first housing (91). A same square telescopic rod (94) is fixedly arranged between the opposite ends of the rotating shaft (92) and the sliding shaft (93). The opposite ends of the rotating shaft (92) and the sliding shaft (93) are respectively fixedly connected to the second bevel gear (84) and the cleaning brush (7). One end of the sliding shaft (93) located inside the first housing (91) is fixedly provided with a fixed disk (95). Two electromagnetic telescopic rods (96) are symmetrically and fixedly arranged between the fixed disk (95) and the inner wall of the first housing (91).

4. The water conservancy irrigation filtering device according to claim 3, characterized in that, The electromagnetic telescopic rod (96) includes a telescopic sleeve (14) fixedly arranged on the inner wall of the first housing (91). A telescopic moving rod (15) is arranged inside the telescopic sleeve (14). An electromagnet block (16) is fixedly arranged on the inner wall of the telescopic sleeve (14). A permanent magnet block (17) is fixedly arranged at one end of the telescopic moving rod (15) located inside the telescopic sleeve (14). A spring (18) is fixedly arranged between the permanent magnet block (17) and the electromagnet block (16). An extrusion block (19) is fixedly arranged on the rod wall of the telescopic moving rod (15). A chute matching with the extrusion block (19) is arranged on the inner wall of the telescopic sleeve (14), and an elastic telescopic rod (20) is fixedly arranged on one side of the chute. One end of the elastic telescopic rod (20) is fixedly arranged with an anti-interference pressure sensor (21) in contact with the extrusion block (19).

5. A water conservancy irrigation filtering device according to claim 1, characterized in that, The water flow regulating mechanism (10) includes two regulating plates (101) symmetrically arranged inside the tank body (1). The sides of the two regulating plates (101) are in sliding contact with one end inner wall of the tank body (1), and the two regulating plates (101) are located on both sides of the water inlet pipe (2). Support brackets (102) are fixedly arranged on the outer walls on both sides of the tank body (1). Electric push rods (103) are fixedly arranged inside the two support brackets (102). The moving ends of the two electric push rods (103) are fixedly provided with regulating rods (104) extending into the tank body (1). One ends of the two regulating rods (104) are respectively fixedly connected to the side walls of the two regulating plates (101).

6. The water conservancy irrigation filtering device according to claim 5, characterized in that Sliders (105) are arranged at the top and bottom of the two regulating plates (101). Two sliding rods (106) are symmetrically arranged inside the tank body (1). The two ends of the two sliding rods (106) are fixedly connected to the inner walls on both sides of the tank body (1). The top and bottom sliders (105) are respectively slidably connected to the rod walls of the two sliding rods (106).

7. The water conservancy irrigation filtering device according to claim 3, characterized in that, The wear degree detection mechanism (11) includes a second housing (111) located inside the tank body (1). Second support plates (112) are fixedly arranged at the top and bottom of the second housing (111). One ends of the two second support plates (112) away from the second housing (111) are slidably connected to the strip-shaped grooves on the inner wall of the tank body (1). A torque sensor (113) is fixedly arranged on the inner side wall of the second housing (111). The rotating part of the torque sensor (113) is fixedly connected to one end of the sliding shaft (93).

8. A water conservancy irrigation filtering device according to claim 1, characterized in that, The cleaning brush (7) is of a three-blade type. The cleaning brush (7) is made of nylon brush. The filter screen (4) is of a disc-shaped mesh body.

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