Device and method for measuring water level of drainage pipe network

Abstract

The drainage pipe network water level measuring device comprises a supporting frame, a driving assembly, a dredging assembly and a laser probe, the bottom of the supporting frame is connected with a lifting base through an air cylinder, and the laser probe is fixedly installed on a connecting frame at the bottom of the supporting frame; the hollow shaft is rotatably sleeved in the middle of the lifting seat in the vertical direction, the inner sleeve is slidably sleeved in the hollow shaft in the vertical direction, the top of the inner sleeve is fixedly connected with the bottom of the supporting frame, the spiral blade is fixed on a shaft body below the hollow shaft, the bottom of the hollow shaft is closed, a liquid inlet hole is formed in the side wall of the hollow shaft, a floating body is arranged in the hollow shaft, and a receiving point position is arranged at the top of the floating body; under the action of the air cylinder and the driving assembly, the lifting base drives the hollow shaft to move downwards, and meanwhile the hollow shaft can rotate synchronously. Sludge and pollutants in the pipeline are cleaned, interference of the sludge and the pollutants on water level measurement is eliminated, and therefore the water level measurement precision is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water level detection devices, and particularly relates to a water level measuring device for a drainage pipe network and a measuring method thereof. Background Art

[0002] The drainage pipe network is an important symbol to measure the modernization level of a city and is a crucial infrastructure to ensure the normal operation of urban life. With the development of the city and a substantial increase in the water-using population, the discharge of urban water and sewage has reached a new high. Conducting scientific and efficient monitoring and management of the drainage pipe network can timely detect problems such as poor drainage, overflow, and waterlogging. Under extreme weather conditions such as rainstorms or floods, by real-time monitoring the water level in the pipe network, urban waterlogging and flood situations can be early warned, helping urban management departments to timely take emergency measures, such as starting drainage pump stations and dredging drainage pipes, thereby effectively reducing the impact of waterlogging disasters on urban traffic and residents' lives and reducing disaster losses. Giving full play to the role of drainage pipe network information in urban planning, construction, operation, and management is of great significance for realizing the construction of a smart city and the sustainable development of the city.

[0003] The underground environment of the drainage pipe network is extremely complex, with a large number of various suspended substances. Moreover, the water level change range will be very large during the rainy season, resulting in the long-term operation of the underground at a high liquid level. The underground environment of the drainage pipe network is extremely complex, with a large number of various suspended substances. Moreover, the water level change range will be very large during the rainy season, resulting in the long-term operation of the underground at a high liquid level. Currently, the commonly used measurement methods in the market, such as regularly dispatching staff to inspect the drainage pipes, manually measuring the water level and recording data. Although this method is simple, it is limited by the inspection frequency and coverage of the staff and the underground environment; there is also non-contact measurement using radar waves, which measures the water level by emitting radar waves and receiving reflected waves. However, once the water level is too high, it will enter the measurement blind area and thus cannot accurately measure. In addition, some radar water level gauges are affected by suspended substances in the pipeline, and the accuracy is significantly reduced; in addition, the probe of the submersible water level gauge is easily blocked by sediment and various sundries, and the maintenance workload is relatively large.

[0004] The above measurement methods are all affected by pollutants or floating objects in the pipeline to varying degrees. These pollutants and floating objects lead to an increase in measurement errors, equipment damage, or an increase in maintenance costs, thereby affecting the accuracy and reliability of measurement data. Based on this, it is of great significance to study a drainage pipe network water level measurement auxiliary device that is easy to use, can effectively improve the measurement accuracy, and has strong reliability to solve the limitations of the existing measurement methods. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a water level measuring device for a drainage pipe network and its measuring method, which effectively solves the problems existing in the existing measuring methods, such as limited measuring accuracy, complex measuring environment, easy damage of measuring equipment, and low measuring efficiency.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a water level measuring device for a drainage pipe network, characterized in that: it includes a support frame, a driving component, a dredging component and a laser probe. The bottom of the support frame is connected to a lifting seat through a cylinder, and the laser probe is fixedly installed on a connecting frame at the bottom of the support frame; the dredging component is installed on the lifting seat, and the dredging component includes a hollow shaft, a spiral blade and an inner sleeve. The hollow shaft is rotatably sleeved in the middle of the lifting seat vertically, the inner sleeve is slidably sleeved in the hollow shaft vertically, and the top is fixedly connected to the bottom of the support frame. The spiral blade is fixed on the shaft body below the hollow shaft. The bottom of the hollow shaft is closed, and a liquid inlet hole is opened on the side wall. A floating body is arranged inside the hollow shaft, and a receiving point is arranged at the top of the floating body; the driving component is arranged on the lifting seat, and the driving component includes a driving motor, a main gear and a driven gear. The main gear is in transmission connection with the output shaft of the driving motor, the driven gear is fixedly sleeved on the hollow shaft and meshes with the main gear. Under the action of the cylinder and the driving component, while the lifting seat drives the hollow shaft to move downward, the hollow shaft can also rotate synchronously.

[0007] Further, the upper part of the support frame is erected on the top of the pipeline to be measured, and a plurality of counterweights can be configured on the top. A connecting rod is vertically arranged downward below the support frame, and the connecting rod extends downward into the pipeline to be measured, and the end is fixedly connected to the connecting frame.

[0008] Further, a cylinder is fixedly installed below the connecting frame, and an installation seat is arranged in the middle of the connecting frame. The inner cavity of the inner sleeve is hollow, and it vertically penetrates through the connecting frame upward and is in contact and communication with the installation seat.

[0009] Further, a laser probe is arranged on the installation seat, and its bottom emission end faces the inner cavity of the inner sleeve.

[0010] Further, the lifting seat includes a disc, the inner diameter of the disc is adapted to the inner diameter of the pipeline to be measured, the bottom of the cylinder is fixedly connected to the top of the disc, and the up and down movement of the disc is controlled by the telescopic cylinder.

[0011] Further, the driving motor is fixedly installed on the lifting seat through a motor seat, and a protective housing can also be fixedly sleeved outside the driving motor.

[0012] Further, the lifting seat includes a socket, a swing rod, a hinge seat, a base and an outer sleeve. The outer sleeve is rotatably sleeved outside the hollow shaft, the socket is fixedly sleeved above the outer sleeve, the bottom of the outer sleeve is fixedly connected to the base, and the base is fixedly sleeved on the hollow shaft through a bearing.

[0013] Furthermore, a plurality of sets of rolling components are evenly arranged on the outer periphery of the outer sleeve. Each rolling component includes a swing rod, a roller, and a hinge seat. The upper and lower ends of the swing rod are respectively hinged to the sleeve seat and the outer sleeve through the hinge seats, and the roller is rotatably installed at the outer end of the swing rod.

[0014] Furthermore, the top of the sleeve seat is fixedly connected to the bottom of the cylinder. When the sleeve is driven by the cylinder to move up and down, the sleeve seat can be driven to move up and down on the outer sleeve at the same time, so that the swing rod can open outwards or contract.

[0015] The present invention also provides a method for measuring the water level of a drainage pipe network, which uses the above-mentioned drainage pipe network water level measuring device, and is characterized in that it includes the following steps: Step 1: Fix the water level measuring device on the mounting seat, ensure that the water level measuring device corresponds to the inner sleeve and the inner cavity of the hollow shaft, and then fix the support frame on the top of the pipe to be measured for the water level; Step 2: The controller drives the cylinder to extend vertically downwards to drive the lifting seat to synchronously drive the hollow shaft to move vertically downwards in the pipe; Step 3: While starting the cylinder, control the driving motor to work, and through the meshing of the main gear and the driven gear, the hollow shaft rotates self - sufficiently; Step 4: Control the hollow shaft to move vertically downwards. During this process, the spiral blades on the hollow shaft can rotate and clean the dirt in the pipe; Step 5: Until the bottom of the hollow shaft contacts the inner wall of the bottom of the horizontal pipe, the water flow in the pipe flows into the hollow shaft through the liquid inlet on the side wall of the hollow shaft; as the liquid in the hollow shaft rises, the floating body floats upwards under the action of buoyancy, and the ray distance between the receiving point and the laser probe changes accordingly; Step 6: The sensor inside the laser probe detects and records the change in the ray distance, converts it into an electrical signal and transmits it to the controller, and calculates the water level height value in the pipe to be measured according to the ray distance measured by the laser probe.

[0016] The beneficial effects of the above technical solutions are as follows: For the drainage pipe network water level measuring device and its measuring method provided by the present invention, the design of the spiral blades realizes the automatic cleaning of sludge. By cleaning the sludge and pollutants in the pipe, the interference to water level measurement is eliminated, thus significantly improving the measurement accuracy; the laser probe is used as the main measurement sensor, and the cooperative design of the floating body and the laser probe can reflect the change of the water level in the hollow shaft in real time, and its high precision and stability further ensure the real - time performance and accuracy of the measurement.

[0017] Through the meshing transmission of the main gear and the driven gear, the present invention realizes the stable self-rotation of the hollow shaft. The sliding fit design of the inner sleeve and the hollow shaft ensures that the laser probe will not be affected by the liquid fluctuations in the pipeline during the measurement process. This design improves the stability of the measurement and further enhances the accuracy of the measurement.

[0018] In the device of the present invention, the bottom of the hollow shaft is closed, and a liquid inlet hole is opened on the side wall, so that the water flow in the pipeline can smoothly enter the hollow shaft inside the device. In this way, by accurately measuring the water level height in the hollow shaft, the actual water level in the pipeline can be accurately reflected through the water level in the hollow shaft. The present invention not only improves the accuracy and reliability of the measurement, but also greatly improves the work efficiency, providing strong support for the management and maintenance of the urban drainage system. Brief Description of the Drawings

[0019] Figure 1 It is a schematic assembly structure diagram of an implementation manner; Figure 2 It is a schematic three-dimensional structure diagram of an implementation manner; Figure 3 It is a schematic front view structure diagram of an implementation manner;; Figure 4 It is a schematic implementation structure diagram of different working states; Figure 5 It is a schematic implementation structure diagram of the measurement state; Figure 6 It is a schematic assembly structure diagram of another implementation manner.

[0020] Reference Numerals: 1 - pipeline to be measured, 2 - horizontal pipeline, 3 - support frame, 4 - connecting rod, 5 - connecting frame, 6 - cylinder, 7 - inner sleeve, 8 - hollow shaft, 9 - bearing, 10 - disc seat, 11 - laser probe, 12 - driving motor, 13 - driven gear, 14 - motor seat, 15 - main gear, 16 - liquid inlet, 17 - spiral blade, 18 - floating body, 20 - socket, 21 - swing rod, 22 - roller, 23 - hinge seat, 24 - base, 25 - outer sleeve. Detailed Description of the Invention

[0021] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments: Example 1. This example aims to provide a water level measurement device for a drainage pipe network, which is mainly installed as Figure 1At the intersection of the horizontal pipe and the pipe to be measured, i.e., the underground position, it aims to solve problems such as limited measurement accuracy, complex measurement environment, easy damage of measurement equipment, and low measurement efficiency in traditional measurement methods. Existing drainage pipe network water level measurement methods, such as manual inspection and manual measurement, radar wave non-contact measurement, and submersible water level gauges, are all affected by pollutants or floating objects in the pipe to varying degrees, resulting in increased measurement errors, equipment damage, or increased maintenance costs, thus affecting the accuracy and reliability of measurement data. Therefore, this embodiment provides a drainage pipe network water level measurement device. By first cleaning the sludge accumulated in the pipe before measurement, then allowing the water flow in the pipe to enter the hollow shaft, and then using the measurement device to measure the water level in the hollow shaft, the water level depth in the pipe can be obtained. The drainage pipe network water level measurement device provided in this embodiment provides a more accurate, reliable, and efficient solution for the water level measurement of urban drainage pipe networks.

[0022] As Figure 2 and Figure 3 As shown, a drainage pipe network water level measurement device provided in this embodiment includes a support frame 3, a lifting seat, a driving component, a dredging component, a laser probe 11, etc. The support frame 3 is erected above the top of the pipe to be measured 1. Weights can be configured at both the left and right ends of the support frame 3 to ensure the stability of the support frame 3 on the top of the pipe and avoid measurement errors caused by external interference (such as wind force, vibration, etc.) during the measurement process. Two connecting rods 4 are fixedly spaced below the support frame 3. The two connecting rods 4 extend vertically downward into the pipe to be measured 1, and the end is fixedly connected to a connecting frame 5, and the connecting frame 5 is parallel to the support frame 3.

[0023] A cylinder 6 is fixedly installed below the connecting frame 5. The cylinder 6 extends vertically downward, and the bottom output end is fixed to the lifting seat. In this embodiment, two groups of cylinders 6 are provided to ensure that when the cylinder 6 is driven to expand and contract by the controller, it can smoothly drive the lifting seat to descend and ascend.

[0024] As Figure 2 and 3 As shown, an installation seat is also fixed in the middle of the connecting frame 5. The measurement device is fixedly arranged on the installation seat. An inner sleeve 7 is provided between two adjacent cylinders 6, and the inner cavity of the inner sleeve 7 is hollow. The top vertically penetrates through the connecting frame 5 and is fixedly sleeved with the installation seat. The bottom is slidably sleeved in the hollow shaft 8. Further, in this embodiment, the measurement device is a laser probe 11, and the reflection end at the bottom of the laser probe 11 faces the inner cavity of the inner sleeve 7. When the driving cylinder 6 controls the lifting seat to drive the hollow shaft 8 to move up and down, the inner sleeve 7 can always be sleeved in the hollow shaft 8, so as to ensure that the laser probe 11 is not affected by the liquid fluctuation in the pipe during the measurement process, thereby improving the measurement accuracy.

[0025] In this embodiment, the lifting seat is a disc seat 10. The bottom of the air cylinder 6 is fixedly connected to the disc seat 10. By controlling the telescopic movement of the air cylinder 6, the lifting of the disc frame is driven. Among them, the driving assembly is installed on the disc frame and is used to drive the hollow shaft 8 of the dredging assembly to rotate self - sufficiently. Specifically, in this embodiment, the dredging assembly includes a hollow shaft 8, a spiral blade 17 and an inner sleeve 7. The hollow shaft 8 is rotatably sleeved in the middle of the disc seat 10 through a bearing 9, and the top extends out of the inside of the disc seat 10 and is sleeved with the inner sleeve 7. The bottom of the hollow shaft 8 extends vertically downward. The spiral blade 17 is fixedly sleeved on the lower shaft body of the hollow shaft 8. When the hollow shaft 8 rotates self - sufficiently, the spiral blade 17 can be driven to rotate synchronously, so as to clean pollutants such as sludge in the pipeline to be measured 1, so as to keep the water flow smooth between the intersection of the pipeline to be measured 1 and the horizontal pipeline 2, and then facilitate the water level measurement through the laser probe 11.

[0026] Furthermore, a liquid inlet 16 is also provided on the lower shaft body of the hollow shaft 8. The bottom of the hollow shaft 8 is in an arc structure and is closed. Thus, when the hollow shaft 8 is driven downward, the water flow in the pipeline to be measured 1 can flow into the inner cavity of the hollow shaft 8 through the liquid inlet 16. And when the bottom of the hollow shaft 8 contacts the inner bottom wall of the horizontal pipeline 2, under the action of the spiral blade 17, the pollutants around the hollow shaft 8 can be swirled and stirred, so that the water flow in the pipeline enters the hollow shaft 8 through the liquid inlet 16. Finally, the liquid in the hollow shaft 8 is flush with the liquid in the outer pipeline. By using the laser probe 11 to measure the water level depth of the liquid in the hollow shaft 8, the water level in the pipeline to be measured 1 can be obtained through calculation.

[0027] Specifically, as Figure 4 and Figure 5 shown, a floating body 18 is also provided inside the hollow shaft 8. The floating body 18 and the hollow shaft 8 are in clearance fit. When liquid flows into the hollow shaft 8, as the liquid in the hollow shaft 8 rises, under the action of buoyancy, the floating body 18 can float upward. And a receiving point is provided at the top of the floating body 18 for receiving the rays emitted by the laser probe 11. The water level in the hollow shaft 8 changes, so that the floating body 18 rises or falls correspondingly. In this way, the ray distance between the emission end of the connecting frame 5 and the receiving end on the floating body 18 of the laser probe 11 will also change correspondingly. By detecting the ray distance of the laser probe 11, the height value of the water level in the pipeline to be measured 1 can be calculated accordingly.

[0028] As Figure 2As shown in the figure, in this embodiment, the driving component includes a driving motor 12, a main gear 15 and a driven gear 13. The driving motor 12 is installed on the disc frame through a motor base 14 fixed on the disc frame. A protective housing can also be fixedly sleeved outside the driving motor 12 to prevent the driving motor 12 from being affected by external interference when it extends into the pipeline and thus affecting the operation of the motor. The main gear 15 is fixed on the output shaft of the driving motor 12, and the driven gear 13 is fixedly sleeved on the hollow shaft 8 and meshes with the main gear 15. Therefore, when the driving motor 12 is operated through the controller, the hollow shaft 8 can be driven to rotate through the meshing transmission of the main gear 15 and the driven gear 13.

[0029] Principle description; In the actual application of the water level measuring device for the drainage pipeline network provided in this embodiment, appropriate counterweights are configured at the left and right ends of the support frame according to the on-site situation to ensure the stability of the support frame on the top of the pipeline to be measured. The cylinder 6 is started through the controller, and the output end of the cylinder 6 starts to expand and contract, pushing the lifting seat (disc seat 10) downward. At the same time, the driving motor 12 is started, and the output shaft of the driving motor 12 drives the main gear 15 to rotate. The hollow shaft 8 is driven to rotate on the disc seat 10 through the meshing of the main gear 15 and the driven gear 13. As the hollow shaft 8 moves downward and rotates, the spiral blade 17 below it starts to clean the sludge and pollutants in the pipeline to ensure smooth water flow. At the same time, the liquid inlet 16 at the bottom of the hollow shaft 8 comes into contact with the water flow in the pipeline, and the water flow flows into the inner cavity of the hollow shaft 8 through the liquid inlet on the hollow shaft. When the bottom of the hollow shaft 8 touches the bottom, the expansion and contraction of the cylinder 6 is stopped. The laser probe 11 is driven to start working through the controller. The ray emitted by it passes through the inner sleeve 7 and shoots at the receiving point on the floating body 18 in the inner cavity of the hollow shaft 8. As the liquid in the hollow shaft 8 rises, the floating body 18 floats upward under the action of buoyancy, and the ray distance between the receiving point and the laser probe 11 changes accordingly until the liquid in the hollow shaft 8 reaches the same level as the liquid in the outer pipeline. The sensor inside the laser probe 11 detects and records the change in the ray distance, converts it into an electrical signal for transmission and processing, and transmits the signal to the controller, thereby calculating the water level height value in the pipeline 1 to be measured. After the water level measurement is completed, the cylinder 6 is driven to expand and contract through the controller, so that the lifting seat (disc seat 10) drives the hollow shaft 8 to move upward, retracting the measuring device. The staff can also record the measured water level height value and compare and analyze it with the historical data. According to the analysis results, the water level change situation of the drainage pipeline network is evaluated, providing data support for subsequent maintenance and management.

[0030] See Figure 5, in this embodiment, the water level height calculation process includes: First, define the distance from the ground to the laser probe transmitting end as H1, the distance between the laser probe transmitting end and the receiving end as H0, the height of the floating body as H2, and the distance from the ground to the bottom surface of the horizontal pipe as H. Then, after the water level in the hollow shaft stabilizes, the water level height h is calculated by the following formula: h = H - (H0 + H1 + H2) The drainage pipe network water level measuring device provided in this embodiment eliminates the interference of sludge and pollutants in the pipe to the water level measurement by cleaning them, thereby significantly improving the measurement accuracy. The cooperative design of the floating body and the laser probe can reflect the change of the water level in the hollow shaft in real time, further improving the real-time performance and accuracy of the measurement. The device of the present invention can automatically complete two steps of sludge cleaning and water level measurement without manual intervention, significantly improving the measurement efficiency. The fast response and high-precision measurement of the laser probe shorten the measurement time and improve the work efficiency.

[0031] Embodiment 2, this embodiment provides another installation structure of the lifting seat.

[0032] As Figure 6 shown, in this embodiment, the lifting seat includes a sleeve seat, a swing rod, a hinge seat, a base and an outer sleeve. In this embodiment, the outer sleeve is rotatably sleeved outside the hollow shaft. A sleeve seat 20 is fixedly sleeved above the outer sleeve, and the bottom of the outer sleeve is fixedly connected to the base 24. The base is fixedly sleeved on the hollow shaft through a bearing. A plurality of groups of rolling components are evenly arranged on the outer periphery of the outer sleeve. In this embodiment, the rolling components include a swing rod, a roller and a hinge seat. The upper and lower ends of the swing rod are respectively hinged to the sleeve seat 20 and the outer sleeve 25 through the hinge seat, and the outer end of the swing rod is rotatably installed with the roller; the bottom of the cylinder is fixedly connected to the top of the sleeve seat 2. With such a setting of the lifting seat in this embodiment, when the sleeve is driven to move up and down by the cylinder, the sleeve seat can be driven to move up and down on the outer sleeve at the same time, so that the swing rod can open or contract outward, so that the lifting seat can adapt to pipes with different inner diameters, further improving the applicable range of the measuring device.

[0033] In this embodiment, through the cooperative design of the swing rod and the roller, the lifting seat can adapt to pipes with different inner diameters and can achieve stable lifting movement without manual adjustment. This greatly improves the applicability and flexibility of the measuring device in complex drainage pipe networks; and because the lifting seat can closely fit the inner wall of the pipe, it reduces the measurement error caused by the change of the pipe inner diameter. At the same time, the rolling friction of the rolling components also reduces the resistance during the lifting process, further improving the measurement accuracy and stability.

[0034] Embodiment 3, on the basis of the above Embodiment 1 and 2, this embodiment provides a method for measuring the water level of a drainage pipe network, which specifically includes the following steps: Step 1: Fix the water level measuring device on the mounting base, ensure that the water level measuring device corresponds to the inner sleeve and the inner cavity of the hollow shaft, and then fix the support frame on the top of the pipeline where the water level is to be measured; Step 2: The controller drives the cylinder to extend vertically downward to drive the lifting seat to synchronously drive the hollow shaft to move vertically downward in the pipeline; Step 3: While starting the cylinder, control the driving motor to work. Through the meshing of the main gear and the driven gear, the hollow shaft rotates; Step 4: Control the hollow shaft to move vertically downward. During this process, the spiral blades on the hollow shaft can rotate and clean the dirt in the pipeline; Step 5: Until the bottom of the hollow shaft contacts the inner wall of the bottom of the horizontal pipeline, the water flow in the pipeline flows into the hollow shaft through the liquid inlet on the side wall of the hollow shaft; as the liquid in the hollow shaft 8 rises, the floating body 18 floats upward under the action of buoyancy, and the ray distance between the receiving point and the laser probe 11 changes accordingly; Step 6: The sensor inside the laser probe 11 detects and records the change in the ray distance, converts it into an electrical signal and transmits it to the controller, and calculates the water level height value in the pipeline 1 to be measured according to the ray distance measured by the laser probe 11.

[0035] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. The basic concept of the present invention is to clean the sludge accumulated in the pipeline before measurement, so that the water flow in the pipeline enters the hollow shaft, and then use the measuring device to measure the water level in the hollow shaft, and the water level depth in the pipeline can be obtained; the present invention significantly improves the measurement accuracy and further improves the real-time performance and accuracy of the measurement. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A drainage network water level measuring device, characterized in that: It includes a support frame, a driving assembly, a dredging assembly and a laser probe, the bottom of the support frame is connected to a lifting seat through a cylinder, and the laser probe is fixedly mounted on a connecting frame at the bottom of the support frame; the dredging assembly is mounted on the lifting seat, and the dredging assembly includes a hollow shaft, a spiral blade and an inner sleeve, the hollow shaft is vertically rotated and sleeved in the middle of the lifting seat, the inner sleeve is vertically slidably sleeved in the hollow shaft, the top is fixedly connected to the bottom of the support frame, the spiral blade is fixed on the shaft body below the hollow shaft, the bottom of the hollow shaft is closed, a liquid inlet hole is opened on the side wall, a floating body is provided inside the hollow shaft, and a receiving point is provided on the top of the floating body; the driving assembly is arranged on the lifting seat, the driving assembly includes a driving motor, a main gear and a slave gear, the main gear is drivingly connected to the output shaft of the driving motor, the slave gear is fixedly sleeved on the hollow shaft and meshes with the main gear, and under the action of the cylinder and the driving assembly, the lifting seat drives the hollow shaft to move downward while the hollow shaft can also rotate synchronously.

2. The drainage network water level measuring device according to claim 1, characterized in that: The support frame is mounted on the top of the pipeline to be measured, and multiple counterweights can be configured on the top. A connecting rod is vertically arranged downward below the support frame. The connecting rod extends downward into the pipeline to be measured, and the end is fixed to the connecting frame.

3. The drainage network water level measuring device according to claim 2, characterized in that: A cylinder is fixedly installed below the connecting frame, a mounting seat is provided in the middle of the connecting frame, the inner cavity of the inner sleeve is hollow, and the upper part thereof vertically passes through the connecting frame upwards and is in contact with and communicated with the mounting seat.

4. The drainage network water level measuring device according to claim 3, characterized in that: The mounting seat is provided with a laser probe, the bottom emitting end of which faces the inner cavity of the inner sleeve.

5. The drainage network water level measuring device according to claim 1, characterized in that: The lifting seat comprises a disc, the inner diameter of which matches the inner diameter of the pipe to be measured, the bottom of the cylinder is fixedly connected to the top of the disc, and the up and down movement of the disc is controlled by the extension and contraction of the cylinder.

6. The drainage network water level measuring device according to claim 1, characterized in that: The driving motor is fixedly mounted on the lifting seat via a motor seat, and a protective shell can be fixedly mounted on the outer side of the driving motor.

7. The drainage pipe network water level measuring device according to claim 1, characterized in that: The lifting seat comprises a sleeve, a swing rod, an articulated seat, a base and an outer sleeve. The outer sleeve is rotatably sleeved on the outside of the hollow shaft, the upper part of the outer sleeve is fixedly sleeved with the sleeve, the bottom of the outer sleeve is fixedly connected to the base, and the base is fixedly sleeved on the hollow shaft through a bearing.

8. The drainage pipe network water level measuring device according to claim 7, characterized in that: A plurality of rolling assemblies are evenly arranged on the outer circumference of the outer sleeve, and the rolling assemblies include a swing rod, a roller and a hinge seat. The upper and lower ends of the swing rod are respectively hinged to the sleeve seat and the outer sleeve through the hinge seat, and the roller is rotatably installed on the outer end of the swing rod.

9. The drainage pipe network water level measuring device according to claim 8, characterized in that: The top of the sleeve is fixedly connected to the bottom of the cylinder. When the sleeve is driven to move up and down by the cylinder, the sleeve can be driven to move up and down on the outer sleeve at the same time, so that the swing rod can be opened or contracted outward.

10. A method for measuring the water level of a drainage network, using the drainage network water level measuring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Fix the water level measuring device on the mounting base and ensure that the water level measuring device corresponds to the inner sleeve and the inner cavity of the hollow shaft, and then fix the support frame on the top of the pipe whose water level is to be measured; Step 2: The controller drives the cylinder to extend vertically downward to drive the lifting seat to synchronously drive the hollow shaft to move vertically downward in the pipeline; Step 3: Start the cylinder and control the drive motor to work, so that the hollow shaft rotates by meshing the main gear and the slave gear; Step 4: Control the hollow shaft to move vertically downward. During this process, the spiral blade on the hollow shaft can rotate and clean the dirt in the pipe; Step 5: until the bottom of the hollow shaft contacts the inner wall of the bottom of the horizontal pipe, the water in the pipe flows into the hollow shaft through the liquid inlet on the side wall of the hollow shaft; as the liquid in the hollow shaft rises, the float floats upward under the action of buoyancy, and the ray distance between the receiving point and the laser probe changes accordingly; Step 6: The sensor inside the laser probe detects and records the change in the ray distance, and converts it into an electrical signal and transmits it to the controller. Based on the ray distance measured by the laser probe, the water level height value in the measured pipe is calculated.

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