Water flow detection device for water conservancy aqueduct

Abstract

The invention discloses a water conservancy aqueduct water flow detection device which comprises a base, a floating body, a parallel connecting rod set and a processor, the base is fixedly installed at the bottom of an aqueduct, the floating body is placed on the water surface above the base in a floating mode and hinged to the base through the parallel connecting rod set, and a main installation frame of a parallelogram structure is formed; the floating body can automatically translate and lift around the base along with the height of the water surface, and the distance between the floating body and the base is adjusted; the invention aims to provide the water conservancy aqueduct water flow detection device which is self-adaptive to water level change, uniform in layered speed measurement and full-automatic, so that the flow monitoring precision and reliability are improved, the fine water resource management requirement is met, and the operation and maintenance cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of aqueduct water flow velocity measurement, and in particular relates to a water flow detection device for a hydraulic aqueduct. Background Art

[0002] An aqueduct is an overhead water transfer structure that transports water across rivers, roads, ravines, etc. It is one of the most widely used cross-structures in canal system structures. In addition to transporting canal water for farmland irrigation, urban domestic water, and industrial water across river basins, aqueducts can also provide drainage and diversion functions. Accurate monitoring of their water flow is of great significance for water resource management, flood control and drought relief, and water ecological protection.

[0003] However, the existing water flow detection devices for water conservancy aqueducts still have many shortcomings and are difficult to meet the increasingly refined management requirements. The existing water flow velocity detection devices for water conservancy aqueducts all use fixed velocity measuring devices, such as fixed current meters, open channel flow meters, etc. Once the installation position and elevation of such devices are determined, it is difficult to change. When the water level in the aqueduct changes, the relative position of the velocity measuring point will also change, resulting in a decrease in measurement accuracy. Especially in the dry season and the flood season, the water level difference is greater and the performance is particularly obvious. It is impossible to adapt to the dynamic changes of the water level in the aqueduct. Secondly, the arrangement of velocity measuring points of the existing devices is relatively simple, and the velocity meters are usually arranged at only a few fixed elevations. This arrangement has fewer upper measuring points when the water level is high, and the lower measuring points may be suspended when the water level is low, making it difficult to ensure uniform and reasonable layered velocity measurement of the water-passing section under different water depth conditions. The velocity measurement results are not representative enough, affecting the overall measurement accuracy. Summary of the invention

[0004] In view of the defects and problems existing in the existing turbochargers, the present invention aims to provide a fully automated hydraulic aqueduct water flow detection device with adaptive water level changes, uniform stratified speed measurement, so as to improve the flow monitoring accuracy and reliability, meet the needs of refined water resource management, and save operation and maintenance costs.

[0005] The solution adopted by the present invention to solve its technical problems is: a water flow detection device for a hydraulic aqueduct, comprising a base, a float, a parallel connecting rod group and a processor, wherein the base is fixedly installed on the bottom of the aqueduct, the float floats on the water surface above the base, and is hinged to the base through the parallel connecting rod group to form a main mounting frame in the shape of a parallelogram structure, and the float automatically translates and rises and falls around the base following the water surface height to adjust the distance between the float and the base; a plurality of velocity measuring tubes are evenly arranged vertically between the float and the base, the velocity measuring tubes are arranged along the water flow direction and are parallel to the base, and the water flow in the aqueduct can flow through the velocity measuring tubes; the velocity measuring tubes are hinged to the parallel connecting rod group to divide the mounting frame from top to bottom into a plurality of parallelogram-shaped sub-lifting frames, and ultrasonic water flow detectors connected to the processor are matched and installed in the left and right ends of the velocity measuring tubes, and the processor layers the depth of the aqueduct water flow according to the number of velocity measuring tubes, and detects the flow velocity of the corresponding layer depth water flow through the ultrasonic water flow detectors at both ends of the same velocity measuring tube.

[0006] A water depth measuring instrument connected to a processor is installed at the bottom of the aqueduct or floating body for measuring the depth of water flow in the aqueduct. The processor numbers each velocity measuring tube according to the depth of water flow.

[0007] The floating body comprises a bottom plate, on which a rubber airbag floating body is fixed.

[0008] Two groups of parallel connecting rods are arranged between the base and the floating body in parallel and at intervals in the longitudinal direction. The speed measuring tube is arranged between the two groups of parallel connecting rods and is hinged to the parallel connecting rods on both sides.

[0009] The parallel connecting rod group includes a plurality of support rods arranged in parallel and at intervals along the transverse direction, and the upper and lower ends of the support rods are respectively hinged to the bottom surface of the float and the upper end surface of the base; a plurality of fixed shafts are fixed to the left and right end surfaces of the velocity measuring tube, and the number and position of the fixed shafts on each side of the velocity measuring tube respectively match the number and position of the support rods in the parallel connecting rod group on the same side, and the support rods are rotatably mounted on the support rods on the same side.

[0010] The ultrasonic water flow detector includes a shell, in which an ultrasonic transmitting sensor and an ultrasonic receiving sensor connected to a processor are matched and installed. The ultrasonic receiving sensor is used to receive the ultrasonic signal emitted by the ultrasonic transmitting sensor in the ultrasonic water flow detector at the other end of the same velocity measuring tube. The processor calculates the flow velocity of the deep water flow in this layer according to the receiving time of the ultrasonic receiving sensors in the ultrasonic water flow detectors at both ends of the velocity measuring tube.

[0011] The water flow detection device for aqueduct is characterized in that the processor calculates the water flow velocity using the formula: v = L / 2 × (1 / t1 - 1 / t2) Wherein, V is the average flow velocity, L is the distance between the two ultrasonic water flow detectors on the same velocity measuring tube, t1 is the time it takes for the ultrasonic signal to be transmitted downstream from the ultrasonic water flow detector on the water inlet side of the velocity measuring tube to the ultrasonic water flow detector on the discharge side, and T2 is the time it takes for the ultrasonic signal to be transmitted upstream from the ultrasonic water flow detector on the discharge side of the velocity measuring tube to the ultrasonic water flow detector on the water inlet side.

[0012] Beneficial effects of the invention: The water conservancy aqueduct water flow detection device provided by the invention has the following beneficial effects compared with the existing device: 1. Strong adaptability. The device can adapt to the dynamic changes of the water level in the aqueduct 1 through automatic adjustment of the float and the parallel connecting rod. Regardless of whether the water level rises or falls, the velocity measuring tubes can maintain a relatively reasonable arrangement to ensure the accuracy of layered velocity measurement.

[0013] 2. High measurement accuracy. By evenly arranging multiple velocity measuring tubes between the float and the base, the water flow section is layered, and each layer is independently monitored for flow velocity. This method can effectively improve the accuracy of flow velocity measurement, thereby obtaining more accurate flow calculation results.

[0014] 3. Good reliability. It uses ultrasonic water flow detector as the speed sensor, which has the advantages of non-contact, not affected by water quality, and wide application range. At the same time, the parallelogram structure also makes the device bear force reasonably, with good stability and reliability.

[0015] 4. Fully automated, the device can automatically adjust the spacing between velocity measuring tubes according to water level changes, and the processor automatically collects data from each velocity measuring tube without manual operation. The fully automated operation mode greatly reduces labor costs and improves work efficiency.

[0016] 5. Environmentally friendly and pollution-free, it uses non-contact measurement methods such as ultrasonic waves, and will not cause any pollution to the water body. The entire device is a mechanical structure, does not contain any chemical reagents, and meets environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the automatic adjustment process of water level change of the present invention.

[0019] Figure 3 It is a schematic diagram of the drainage protection shell structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the position of the piston hole of the present invention.

[0021] Figure 5 The airbag locking assembly of the present invention, Numbers in the figure: 1 is aqueduct, 2 is base, 3 is parallel connection, 31 is support rod, 4 is float, 41 is bottom plate, 42 is rubber airbag float, 5 is hinged socket, 6 is speed measuring tube, 61 is fixed shaft, 8 is processor, 91 is sealing shell, 92 is water pipe, 93 is gate, 931 is mounting hole, 94 is device block, 941 is water inlet channel, 942 is water inlet pipe, 943 is notch, 951 is front section piston hole, 952 is rear section piston hole, 96 is linkage assembly, 961 is driving plate, 962 is track slide groove, 9621 is horizontal section, 9622 is driving section, 963 is sliding rod, 97 is ejecting member, 98 is piston rod, 71 is outer sleeve, 72 is annular airbag. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0023] This embodiment provides a water flow detection device for aqueduct with unique structure and ingenious design. Figure 1 and Figure 2 As shown, it includes a base 2, a float 4, a parallel connecting rod group and a processor 8. The base 2 is fixedly installed on the bottom of the aqueduct 1. The float 4 floats on the water surface above the base 2 and is hinged with the base 2 through the parallel connecting rod group to form a parallelogram-shaped main mounting frame. When the water level in the aqueduct 1 changes, the float 4 will automatically follow the water level and automatically move up and down around the base 2 to adjust the distance between the float 4 and the base 2. Specifically: The float 4 includes a bottom plate 41, on which a rubber airbag float 42 is fixed. The bottom plate 41 is made of hard material, which is convenient for connecting a parallel connecting rod group. Two groups of parallel connecting rod groups are arranged between the base 2 and the float 4 along the longitudinal parallel intervals. The parallel connecting rod group includes a plurality of support rods 31 arranged along the transverse parallel intervals. The upper and lower ends of the support rods 31 are respectively hinged to the bottom surface of the float 4 and the upper end surface of the base 2. There are many ways to hinge the two ends of the support rods 31 to the float 4 and the base 2. For example, the upper and lower ends of the support rods 31 are both installed with hinge seats through pins, and the hinge seats at the upper and lower ends of the support rods 31 are respectively fixed to the upper end surface of the base 2 and the bottom surface of the float 4 by bolts, so that the float 4 is connected to the base 2 through the two groups of parallel connecting rod groups to form a parallelogram-shaped main mounting frame, and the height of the main mounting frame will be automatically adjusted according to the water level in the aqueduct 1.

[0024] A plurality of velocity tubes 6 are evenly spaced vertically between the float 4 and the base 2. The velocity tubes 6 are arranged along the water flow direction and are parallel to the base 2. The water flow in the aqueduct 1 can flow through the velocity tubes 6. The velocity tubes 6 are hinged with the parallel connecting rod group, and the mounting frame is divided into a plurality of parallelogram-shaped sub-lifting frames from top to bottom. Ultrasonic water flow detectors connected to the processor 8 are matched and installed in the left and right ends of the velocity tubes 6. The processor 8 layers the water flow depth of the aqueduct 1 according to the number of velocity tubes 6, and detects the flow velocity of the water flow in the corresponding layer depth through the ultrasonic water flow detectors at both ends of the same velocity tube 6. Specifically: The velocity measuring tube 6 is arranged between two groups of parallel connecting rods and is hinged with the parallel connecting rods on both sides. A plurality of fixed shafts 61 are fixed on the left and right end surfaces of the velocity measuring tube 6. The number and position of the fixed shafts 61 on each side of the velocity measuring tube 6 respectively match the number and position of the support rods 31 in the parallel connecting rod group on the same side. The support rods 31 on the same side are rotatably mounted. When the floating body 4 automatically translates and rises around the base 2 to adjust the distance between the two according to the water level, the parallel connecting rod group will synchronously drive the velocity measuring tube 6 to translate and adjust the distance between the two adjacent velocity measuring tubes 6.

[0025] The ultrasonic water flow detector includes a shell, in which an ultrasonic transmitting sensor and an ultrasonic receiving sensor connected to a processor 8 are matched and installed. The ultrasonic receiving sensor is used to receive the ultrasonic signal emitted by the ultrasonic transmitting sensor in the ultrasonic water flow detector at the other end of the same velocity measuring tube 6. The processor 8 calculates the flow velocity of the deep water flow in the layer according to the receiving time t of the ultrasonic receiving sensors in the ultrasonic water flow detectors at both ends of the velocity measuring tube 6. Specifically: The processor 8 calculates the water flow rate using the formula: v = L / 2 × (1 / t1 - 1 / t2) Among them, V is the average flow velocity, L is the distance between the two ultrasonic water flow detectors on the same velocity measuring tube 6, t1 is the time it takes for the ultrasonic signal to be transmitted downstream from the ultrasonic water flow detector on the water inlet side of the velocity measuring tube 6 to the ultrasonic water flow detector on the discharge side, and T2 is the time it takes for the ultrasonic signal to be transmitted upstream from the ultrasonic water flow detector on the discharge side of the velocity measuring tube 6 to the ultrasonic water flow detector on the water inlet side.

[0026] During use, when the water level in the aqueduct 1 changes, the float 4 will rise and fall with the water surface, and at the same time drive all the velocity measuring tubes 6 to move up and down synchronously through the parallel connecting rods, so that the velocity measuring tubes 6 can always maintain a uniform distribution according to the water level depth in the aqueduct 1, thereby achieving the purpose of automatic stratified velocity measurement.

[0027] Furthermore, a depth measuring instrument connected to a processor 8 is installed at the bottom of the aqueduct 1 or the float 4, which is used to measure the water flow depth in the aqueduct 1. The processor 8 numbers each velocity measuring tube 6 according to the water flow depth. The number includes the serial number of the detection tube and the depth of the detection tube. The detection personnel can know the water flow speed at this depth based on the number of the velocity measuring tube 6. Example 2

[0028] The difference between Example 2 and Example 1 is that drainage protection shells are symmetrically installed at the front and rear ends of the velocity measuring tube 6, and the ultrasonic water flow detector is matched and installed in the drainage protection shell. Figure 3 and Figure 4 As shown, the drainage protection shell includes a sealing shell, a linkage assembly, a gate, a piston rod and a push piece. The sealing shell is provided with a water hole connected to the inside at the front end facing the detection tube, and a water pipe is matched and installed. The other end of the water pipe is matched and inserted into the end of the detection tube, and the inner diameters of the water pipe and the water hole are the same as the inner diameter of the detection tube; a device block is provided in the sealing shell, the top of the device block is fixedly connected to the top of the sealing shell, and the device block is provided with a water inlet channel that penetrates the shell backwards. The water inlet channel and the water hole are coaxially arranged, and the tail end of the water inlet channel is connected with a water inlet pipe, which extends backward out of the sealing shell, and the inner diameters of the water inlet pipe and the water inlet channel are the same as the inner diameter of the water pipe; the gate is vertically slidably installed in the sealing shell between the device block and the front inner wall of the sealing shell, and the front and rear end surfaces of the gate are respectively sealed and in contact with the front inner wall of the sealing shell and the front end surface of the device block; a mounting hole matching the water hole is provided on the gate plate, and the ultrasonic water flow detector is matched and installed on the inner wall of the mounting hole.

[0029] A piston hole penetrating the device block is axially provided on the device block below the water inlet channel. The piston rod is axially slidably installed in the piston hole and is connected to the gate plate through a linkage assembly. The tail end of the piston stem is connected to a push piece, which can drive the piston rod to move forward and backward. When the piston rod moves forward and backward, the gate plate is driven to move up and down to the limit position through the linkage assembly, so that the mounting hole on the gate plate overlaps and communicates with the water hole and the piston hole respectively. When the gate plate moves downward to the limit position, the push piece can drive the piston rod to continue to move forward, so that the front end of the piston rod extends out of the piston hole and is inserted into the mounting hole of the gate plate, squeezing the water in the mounting hole so that it passes through the one-way drain valve and is discharged. Specifically: The linkage assembly includes a driving plate symmetrically arranged in the device shell on the left and right sides of the device block, the driving plate is fixedly connected to the gate plate, a drainage hole connected to the outside is provided on the inner wall of the sealing box on the front side of the piston hole, and a one-way drainage valve is installed in a matching manner, a notch is provided upwardly in the middle of the bottom surface of the device block to divide the piston hole into a front and a rear section, the front and rear ends of the piston rod are respectively sealed and slidably inserted into the front section piston hole and the rear section piston hole, track grooves are provided on the two driving plates between the front and rear sections of the piston holes, sliding rods are symmetrically provided on the left and right sides of the piston rod between the front and rear sections of the piston holes, the sliding rods are matched and inserted into the track grooves of the adjacent side driving plates, the track grooves include a horizontal section, the tail end of the horizontal section is connected There is a driving section arranged to be tilted downward, and the vertical distance between the bottom end of the driving section and the horizontal section matches the vertical distance between the water inlet channel and the piston hole. When the slide rod is located at the bottom end of the driving section, the gate is located at the upper limit position. When the piston rod is driven by the driving member to drive the slide rod to slide along the driving section into the horizontal section, the gate will be driven to move downward to the limit position. When the piston rod is driven by the driving member to drive the slide rod to slide forward along the horizontal section, the front end of the piston rod extends out of the piston hole and is inserted into the mounting hole of the gate, squeezing the water in the mounting hole to discharge it through the one-way drain valve, thereby preventing water from corroding the ultrasonic water flow detector when not in use.

[0030] Furthermore, there are many types of ejector members. For example, the ejector member in this embodiment is an electric push rod or a pneumatic push rod. Example 3

[0031] The difference between Example 3 and Example 2 is that a sealing plate is installed at the tail end of the rear piston hole of the control block, and the sealing plate seals the tail end of the rear piston, so that the rear piston hole between the rear end of the piston rod and the sealing plate forms a sealed piston chamber, the telescopic end of the ejector member passes through the sealing plate and is connected to the rear end of the piston rod, and a sliding seal is formed between the telescopic end of the ejector member and the sealing plate; Figure 5 As shown, a plurality of airbag locking assemblies are provided at vertical intervals on the outer end surface of the support rod, and the number and installation positions of the airbag locking assemblies match the number and positions of the speed measuring tubes. The airbag locking assembly includes an outer sleeve fixedly installed on the support rod, the outer sleeve is coaxially arranged with the fixed axis on the same side of the speed measuring tube, and the fixed axis extends outward into the outer sleeve, and an annular airbag is matched and installed in the outer sleeve outside the fixed axis, and the annular airbag is connected with the sealing piston chamber in the drainage protection shell at the end of the adjacent speed measuring tube. When the piston rod is driven by the driving member to drive the sliding rod to slide backward along the horizontal section to the bottom of the driving section, the piston rod will move backward to reduce the volume of the compressed sealing piston chamber, thereby discharging the air pressure in the sealing piston chamber into the annular airbag, causing it to expand and squeeze the fixed axis, thereby locking the angle between the speed measuring tube and the support rod to prevent it from swinging up and down with the fluctuation of the water surface during use.

[0032] Furthermore, a friction layer is provided on the inner annular surface of the annular airbag and the fixed shaft in the annular airbag sleeve area, so that when the annular airbag expands and squeezes the fixed shaft, the friction between the two can be increased.

[0033] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A water flow detection device for a hydraulic aqueduct, characterized in that: The invention comprises a base, a float, a parallel connecting rod group and a processor, wherein the base is fixedly mounted on the bottom of the aqueduct, the float floats on the water surface above the base and is hinged to the base through the parallel connecting rod group to form a main mounting frame in the shape of a parallelogram structure, and the float automatically translates and rises and falls around the base following the water surface height to adjust the distance between the float and the base; a plurality of velocity measuring tubes are evenly arranged vertically between the float and the base, the velocity measuring tubes are arranged along the water flow direction and are parallel to the base, and the water flow in the aqueduct can flow through the velocity measuring tubes; the velocity measuring tubes are hinged to the parallel connecting rod group to divide the mounting frame from top to bottom into a plurality of parallelogram-shaped sub-lifting frames, and ultrasonic water flow detectors connected to the processor are matched and installed in the left and right ends of the velocity measuring tubes, and the processor layers the water flow depth of the aqueduct according to the number of velocity measuring tubes, and detects the flow velocity of the corresponding layer depth water flow through the ultrasonic water flow detectors at both ends of the same velocity measuring tube.

2. The water flow detection device for aqueduct according to claim 1, characterized in that: A water depth measuring instrument connected to a processor is installed at the bottom of the aqueduct or floating body for measuring the depth of water flow in the aqueduct. The processor numbers each velocity measuring tube according to the depth of water flow.

3. The water flow detection device for aqueduct according to claim 1, characterized in that: The floating body comprises a bottom plate, on which a rubber airbag floating body is fixed.

4. The water flow detection device for aqueduct according to claim 1, characterized in that: Two groups of parallel connecting rods are arranged between the base and the floating body in parallel and at intervals in the longitudinal direction. The speed measuring tube is arranged between the two groups of parallel connecting rods and is hinged to the parallel connecting rods on both sides.

5. The water flow detection device for aqueduct according to claim 1, characterized in that: The parallel connecting rod group includes a plurality of support rods arranged in parallel and at intervals along the transverse direction, and the upper and lower ends of the support rods are respectively hinged to the bottom surface of the float and the upper end surface of the base; a plurality of fixed shafts are fixed to the left and right end surfaces of the velocity measuring tube, and the number and position of the fixed shafts on each side of the velocity measuring tube respectively match the number and position of the support rods in the parallel connecting rod group on the same side, and the support rods are rotatably mounted on the support rods on the same side.

6. The water flow detection device for aqueduct according to claim 1, characterized in that: The ultrasonic water flow detector includes a shell, in which an ultrasonic transmitting sensor and an ultrasonic receiving sensor connected to a processor are matched and installed. The ultrasonic receiving sensor is used to receive the ultrasonic signal emitted by the ultrasonic transmitting sensor in the ultrasonic water flow detector at the other end of the same velocity measuring tube. The processor calculates the flow velocity of the deep water flow in this layer according to the receiving time of the ultrasonic receiving sensors in the ultrasonic water flow detectors at both ends of the velocity measuring tube.

7. The water flow detection device for aqueduct according to claim 1, characterized in that: The processor calculates the water flow rate formula as follows: v = L / 2 × (1 / t1 - 1 / t2); Wherein, V is the average flow velocity, L is the distance between the two ultrasonic water flow detectors on the same velocity measuring tube, t1 is the time it takes for the ultrasonic signal to be transmitted downstream from the ultrasonic water flow detector on the water inlet side of the velocity measuring tube to the ultrasonic water flow detector on the discharge side, and T2 is the time it takes for the ultrasonic signal to be transmitted upstream from the ultrasonic water flow detector on the discharge side of the velocity measuring tube to the ultrasonic water flow detector on the water inlet side.

Images