An ultrasonic open channel flow meter

Abstract

This invention relates to the field of flow meter technology, specifically disclosing an ultrasonic open channel flow meter, including a protective frame, a first unfolding mechanism, and a second unfolding mechanism. The first unfolding mechanism drives a main frame plate to automatically flip and unfold or fold on the protective frame, and the main frame plate can be folded and stored in the cavity of the protective frame. The second unfolding mechanism drives a secondary frame plate to automatically flip and unfold or fold on the main frame plate, and also drives a sleeve frame to automatically flip and unfold or fold on the secondary frame plate. The sleeve frame, along with an ultrasonic generator mounted thereon, can be folded and stored in the cavity of the secondary frame plate, and the secondary frame plate, along with the sleeve frame, can be folded and stored in the cavity of the main frame plate. This ultrasonic open channel flow meter can automatically fold and store when not in operation, forming a protective layer to prevent damage from the external environment, effectively reducing maintenance costs. Furthermore, it enables multi-channel measurement, improving measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of flow meter technology, and more particularly to the field of open channel flow meter technology, specifically an ultrasonic open channel flow meter. Background Technology

[0002] Flow meters are indispensable key instruments in industrial production, energy management and environmental protection. Their main function is to accurately measure the amount of fluid flowing through a pipe or open channel per unit time and the cumulative value of the total fluid volume over a certain period of time. In other words, the main function of a flow meter is to measure the flow rate and cumulative flow of the fluid. As the name suggests, open channel flow meters are instruments specifically designed for measuring water flow in open channels with free water surfaces, such as rivers, drainage ditches, and irrigation canals. There are many types of open channel flow meters. As for ultrasonic open channel flow meters, they measure fluid flow by detecting the effect of water flow in the open channel on ultrasonic waves and using the "time difference method".

[0003] For example, Chinese patent CN118746332B discloses an open channel flow meter, including a fixed pile assembly. A second straightening mechanism is connected to the center of the fixed pile assembly. Columns are provided on both sides of the second straightening mechanism. A pressing mechanism is connected through the columns. A first fixing mechanism is connected to the top of the columns. A flow meter is provided below the pressing mechanism. This invention completes the installation and disassembly of the open channel flow meter by moving the pressing mechanism up and down. The second straightening mechanism ensures that no tilting occurs during installation. The fixed pile assembly completes the moving installation of the open channel flow meter.

[0004] Based on the aforementioned patents, existing solutions, and practical application, current ultrasonic open channel flow meters still have some problems, such as: The flow rate of open channels fluctuates greatly due to factors such as rainfall and water usage habits. Only long-term continuous measurement can ensure the continuity and representativeness of the measurement data and truly reflect the characteristics of discharge or inflow. Therefore, to meet the continuous monitoring needs in open channel flow measurement, it is necessary to install open channel flow meters for a long period of time. Existing ultrasonic open channel flow meters, which are permanently installed along open channels, have a fixed structure and cannot be folded up when not in use. This means that the ultrasonic probe components cannot be stored and protected. The ultrasonic probe components are exposed above the open channel for a long time and are easily affected by the external environment, which can lead to inaccurate measurements or hardware damage. The aforementioned patent describes how the open channel flow meter is installed on the side of an open channel using assembly components such as a fixed pile assembly, a straightening mechanism, and a pressing mechanism. When not in use, it is similar to existing ultrasonic open channel flow meters in that the ultrasonic probe components cannot be stored and protected. The entire open channel flow meter must be disassembled, and then reinstalled for the next monitoring operation. This cumbersome process increases maintenance costs and difficulty.

[0005] Therefore, we propose an ultrasonic open channel flow meter to address the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an ultrasonic open channel flow meter to solve the problems mentioned in the background art, which are that the ultrasonic probe components cannot be folded and stored when not in use, and are easily affected by the external environment, leading to inaccurate measurements or hardware damage, and increasing maintenance costs and difficulties.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an ultrasonic open channel flow meter, comprising: A protective frame, which is fixedly installed on a support frame erected above the open channel; Also includes: The first unfolding mechanism drives the main frame plate to automatically flip and unfold or fold on the protective shell frame. The main frame plate can be folded and stored in the shell cavity of the protective shell frame and the cavity opening of the protective shell frame is sealed. The second unfolding mechanism drives the secondary frame plate to automatically flip and unfold or fold on the main frame plate. The second unfolding mechanism also drives the sleeve frame to automatically flip and unfold or fold on the secondary frame plate. The ultrasonic generator along with the sleeve frame can be folded and stored in the cavity of the secondary frame plate, and the secondary frame plate along with the sleeve frame can be folded and stored in the cavity of the main frame plate, thus protecting the ultrasonic generator by folding and storing it.

[0008] Preferably, the first unfolding mechanism includes a push block and a linkage bracket symmetrically arranged about the vertical central axis of the push block. The push block is driven by a first electric telescopic rod to form a sliding structure on the protective frame, and the first electric telescopic rod is fixedly installed on the protective frame. The inward end of the linkage bracket is rotatably connected to the push block, and the outward end of the linkage bracket is rotatably connected to the main frame plate.

[0009] Preferably, the second unfolding mechanism includes an active rack frame and a driven rack frame arranged mirror-image about the horizontal central axis of the active rack frame. The active rack frame is driven by a second electric telescopic rod to form a sliding structure within the main frame plate, and the second electric telescopic rod is fixedly installed within the main frame plate. A linkage spring is provided at the connection between the active rack frame and the driven rack frame for elastic support of the two, and the driven rack frame is driven by the active rack frame to form a linkage sliding structure within the main frame plate.

[0010] Preferably, the active rack and the driven rack are connected in a sliding manner, and a locking element is provided at the sliding connection between the two for locking between them. The locking element forms a flip structure in the driven rack, and a first torsion spring is installed at the flip connection between the two. The locking element is connected to the active rack in an engaging manner. The locking or unlocking of the locking element is used to control the synchronous movement or independent movement of the active rack and the driven rack. The locking component is connected to the unlocking block, which is integrally mounted on the main frame plate, by a pushing method.

[0011] Preferably, the driven rack frame is meshed with the driving gear fixed to the secondary frame plate, and the driving gear and the secondary frame plate form a coaxial rotation structure. The secondary frame plate is mirrored about the horizontal central axis of the main frame plate, and the two secondary frame plates are rotated in opposite directions on the main frame plate. A second torsion spring is installed at the rotation connection between the secondary frame plate and the main frame plate.

[0012] Preferably, a driven gear is rotatably connected inside the secondary frame plate, and a connecting gear that can rotate coaxially with the driven gear is fixedly connected to the driven gear. The connecting gear is connected to the driving rack frame by meshing.

[0013] Preferably, the driven gear one is meshed with the longitudinal rack portion integrally mounted on the connecting plate, and the connecting plate forms a sliding structure within the secondary frame plate. The transverse rack portion integrally mounted on the connecting plate is meshed with the driven gear two, and the driven gear two forms a rotating structure within the secondary frame plate. A third torsion spring is installed at the rotating connection between the two. The driven gear two is fixed to the sleeve frame and forms a coaxial rotating structure.

[0014] Preferably, a sleeve frame is arranged inside the secondary frame plate, and a third electric telescopic rod is fixedly installed inside the sleeve frame. The ultrasonic generator is fixedly installed on the output end of the third electric telescopic rod. The height of the ultrasonic generator is adjusted by the third electric telescopic rod, and the ultrasonic generator at different heights is used to measure the water flow velocity at each layer.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: when not in use, the ultrasonic open channel flow meter can be automatically folded and stored to form protection, avoiding damage from the external environment, effectively reducing maintenance costs and maintenance difficulty, and also realizing multi-channel measurement to improve measurement accuracy; 1. The first unfolding mechanism drives the main frame plate to automatically flip and unfold or flip and fold on the protective frame. The second unfolding mechanism drives the secondary frame plate to automatically flip and unfold or flip and fold on the main frame plate. It also drives the sleeve frame to automatically flip and unfold or flip and fold on the secondary frame plate. This realizes the automatic flipping and unfolding or automatic folding and storage of the ultrasonic generator. The protective frame is used to store and protect the ultrasonic generator. When the ultrasonic open channel flow meter is not working, it avoids the external environment from damaging the ultrasonic generator and effectively reduces maintenance costs and maintenance difficulty. Furthermore, during the initial sliding of the active rack frame, the locking action of the locking device drives the driven rack frame to slide synchronously. Utilizing the meshing action between the driven rack frame and the active gear, the active gear is driven to rotate and cause the secondary frame plate to flip and unfold. As the active rack frame continues to slide, the locking device is released. Utilizing the meshing action between the active rack frame and the connecting gear, and the meshing transmission between the driven first gear, the connecting plate, and the driven second gear, the sleeve frame is driven to flip and cause the ultrasonic generator to flip and unfold. Through the linkage structure, automatic flipping and unfolding or flipping and folding for storage is achieved, reducing manual operation and enabling remote control, ensuring ease of operation. 2. The secondary frame plate is mirrored about the horizontal centerline of the main frame plate, and ultrasonic generators are installed at both the inward and outward ends of the secondary frame plate, so that multiple ultrasonic generators are arranged in an array. Each ultrasonic generator is equipped with a separate third electric telescopic rod. The height of each ultrasonic generator is adjusted by the third electric telescopic rod. Unlike traditional single-point measurement, this method can cope with the complex flow state of water in open channels and realize multi-channel measurement. By deploying ultrasonic generators at different heights, the flow velocity of water in each layer under complex flow conditions can be more realistically reflected, reducing errors and thus improving measurement accuracy. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a frontal cross-sectional view of the first unfolding mechanism of the present invention; Figure 3 This is a top view cross-sectional structural diagram of the second unfolding mechanism of the present invention; Figure 4 This is a top cross-sectional view of the connection between the driven rack and the driving gear of the present invention; Figure 5 This is a front cross-sectional view of the connection between the active rack and the driven rack of the present invention; Figure 6 This is a bottom sectional view of the driven rack frame and locking component of the present invention. Figure 7 This is a side cross-sectional view of the transmission connection between the driven gear and the connecting plate of the present invention. Figure 8 This is a side view schematic diagram of the connection between the secondary frame plate and the drive gear of the present invention; Figure 9 This is a side cross-sectional view of the connection between the secondary frame plate and the sleeve frame of the present invention; Figure 10 This is a front cross-sectional view of the transmission connection between the driven two gears and the connecting plate of the present invention; Figure 11 This is a schematic diagram of Embodiment 2 of the present invention.

[0017] In the diagram: 1. Sheath frame; 2. First unfolding mechanism; 3. Main frame plate; 4. Second unfolding mechanism; 5. Secondary frame plate; 6. Sleeve frame; 7. Ultrasonic generator; 8. Push block; 9. Linkage bracket; 10. First electric telescopic rod; 11. Driving rack frame; 12. Driven rack frame; 13. Second electric telescopic rod; 14. Linkage spring; 15. Locking component; 16. First torsion spring; 17. Unlocking block; 18. Driving gear; 19. Second torsion spring; 20. Driven gear 1; 21. Linkage gear; 22. Linkage plate; 2201. Longitudinal rack section; 2202. Transverse rack section; 23. Driven gear 2; 24. Third torsion spring; 25. Third electric telescopic rod. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1: This invention provides a technical solution: an ultrasonic open channel flow meter that addresses the problem that existing fixed ultrasonic open channel flow meters cannot be folded and stored when not in use, and the ultrasonic probe components cannot be stored and protected, making them susceptible to measurement inaccuracies due to external environmental influences. The solution involves a second unfolding mechanism 4 driving the secondary frame plate 5 to automatically flip and unfold or flip and fold, which in turn drives the sleeve frame 6 to automatically flip and unfold or flip and fold the ultrasonic generator 7. Then, a first unfolding mechanism 2 drives the main frame plate 3 to automatically flip and unfold or flip and fold, achieving automatic flipping and unfolding or automatic folding storage of the ultrasonic generator 7, thus providing storage protection for the ultrasonic generator 7.

[0020] This technical solution: Please refer to Figures 1-10 An ultrasonic open channel flow meter includes a protective frame 1. The upper end of the protective frame 1 is provided with an integrated connecting plate. After the protective frame 1 is installed, it is set in a vertically downward state. The connecting plate is fixedly connected to a support frame above the open channel by bolts. The support frame is set in a horizontal state above the open channel (the support frame is prior art and is not described in the accompanying drawings). It also includes a first unfolding mechanism 2 and a second unfolding mechanism 4. The first unfolding mechanism 2 is located inside the protective frame 1. The first unfolding mechanism 2 drives the main frame plate 3 to automatically flip and unfold or fold on the protective frame 1. The main frame plate 3 can be folded and stored in the cavity of the protective frame 1, and the cavity opening of the protective frame 1 is sealed. The second unfolding mechanism 4 is located inside the main frame plate 3. The second unfolding mechanism 4 drives the secondary frame plate 5 to automatically flip and unfold or fold on the main frame plate 3. The second unfolding mechanism 4 also drives the sleeve frame 6 to automatically flip and unfold or fold on the secondary frame plate 5. The sleeve frame 6, together with the ultrasonic generator 7 mounted on it, can be folded and stored in the cavity of the secondary frame plate 5. The secondary frame plate 5, together with the sleeve frame 6, can be folded and stored in the cavity of the main frame plate 3, thus folding and storing the ultrasonic generator 7 for protection.

[0021] Specifically, in this technical solution, the second unfolding mechanism 4 initially operates, driving the secondary frame plate 5 to automatically flip and unfold or automatically flip and fold on the main frame plate 3, according to... Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, the main frame plate 3 is hollow and has a frame cavity. The end of the main frame plate 3 facing the protective frame 1 is the inward end, and the other end is the outward end. After the second electric telescopic rod 13 is installed, it is fixedly installed in the frame cavity wall of the main frame plate 3 by bolts. The output end of the rod is inserted and fixedly connected to the middle of the active rack frame 11 by bolts. After the active rack frame 11 is installed, it is movably locked in the frame cavity wall of the outward end of the main frame plate 3. When the second electric telescopic rod 13 is started, it initially extends and operates, driving the active rack frame 11 to initially slide in the frame cavity wall of the outward end of the main frame plate 3. Because a locking element 15 for locking the active rack frame 11 and the driven rack frame 12 is provided at the sliding connection, and because the driven rack frame 12 is movably locked in the frame cavity wall at the outer end of the main frame plate 3 after installation, and the driven rack frame 12 and the active rack frame 11 form a linkage sliding structure, when the active rack frame 11 is driven to slide initially, the locking element 15 is locked, locking the active rack frame 11 and the driven rack frame 12 together. Through the locking of the locking element 15, the active rack frame 11 and the driven rack frame 12 are controlled to move synchronously. The initial sliding of the active rack frame 11 drives the driven rack frame 12 to slide synchronously, that is, the driven rack frame 12 slides in the frame cavity wall at the outer end of the main frame plate 3. Since the driven rack frame 12 is mirrored about the horizontal central axis of the driving rack frame 11, and since the secondary frame plate 5 is mirrored about the horizontal central axis of the main frame plate 3, the driving gears 18 on the two secondary frame plates 5 are respectively connected to the two driven rack frames 12. Since the driven rack frame 12 and the driving gear 18 are meshed together, when the two driven rack frames 12 slide simultaneously under the drive of the driving rack frame 11, the two driving gears 18 are driven to rotate in opposite directions through the meshing action between the driven rack frame 12 and the driving gear 18. Since the end of the secondary frame plate 5 facing the main frame plate 3 is the inward end, and the other end is the outward end, the inward end of the secondary frame plate 5 is vertically provided with an integrated shaft column, on which a bearing is fixedly clamped. After the secondary frame plate 5 is installed, its inward end is movably clamped in the frame cavity of the outward end of the main frame plate 3, and the shaft column and bearing are inserted into the frame cavity wall of the outward end of the main frame plate 3. Since the center of the drive gear 18 is provided with an integrated shaft tube, the drive gear 18 is in a movable state in the frame cavity of the outward end of the main frame plate 3 after installation. The shaft tube is sleeved and fixedly connected to the shaft column in the secondary frame plate 5 by bolts. After the drive gear 18 is driven to rotate, it and the secondary frame plate 5 form a coaxial rotation structure, so that the secondary frame plate 5 can automatically flip and unfold in the frame cavity of the main frame plate 3 with the assistance of its shaft column, and the flipping directions of the two secondary frame plates 5 are set in opposite directions. Since the maximum rotation angle of the drive gear 18 is ninety degrees, the secondary frame plate 5 is driven to flip and unfold and is set in a perpendicular state to the main frame plate 3. In addition, the frame cavity wall at the outer end of the main frame plate 3 is used to block and limit the movement, ensuring that the secondary frame plate 5 is flipped and unfolded in a perpendicular state to the main frame plate 3. Because the inner end of the secondary frame plate 5 is provided with a spring compartment with the same center as its central column, and because a second torsion spring 19 is installed at the flip connection between the secondary frame plate 5 and the main frame plate 3, the second torsion spring 19 is movably inserted into the spring compartment at the inner end of the secondary frame plate 5 after being installed. One end of the spring spring 19 is fixedly attached to the wall of the spring compartment, and the other end of the spring spring 19 is fixedly attached to the wall of the frame cavity at the inner end of the main frame plate 3. When the secondary frame plate 5 is flipped and unfolded, the second torsion spring 19 is compressed and undergoes elastic deformation. Conversely, the second electric telescopic rod 13 is activated to retract and operate, driving the active rack frame 11 to slide and reset within the frame cavity wall at the outer end of the main frame plate 3. When the active rack frame 11 drives the driven rack frame 12 to slide and reset, the meshing action between the driven rack frame 12 and the active gear 18, along with the elastic deformation reset of the second torsion spring 19, causes the active gear 18 to rotate and reset, driving the secondary frame plate 5 to automatically flip and fold on the main frame plate 3. Since the width of the secondary frame plate 5 is smaller than the depth of the frame cavity in the main frame plate 3, the secondary frame plate 5 can be parallel to the main frame plate 3 and completely stored within the frame cavity in the main frame plate 3 after flipping and folding. In addition, the frame cavity wall on the inner side of the main frame plate 3 acts as a stop and limit, ensuring that the secondary frame plate 5 is parallel to the main frame plate 3 after flipping and folding.

[0022] Specifically, in this technical solution, the second unfolding mechanism 4 operates continuously, and through the second unfolding mechanism 4, the sleeve frame 6 is driven to automatically flip and unfold or automatically flip and fold on the secondary frame plate 5, according to... Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the secondary frame plate 5 is hollow and has a frame cavity. When the secondary frame plate 5 is fully flipped and unfolded, the driven rack frame 12 is completely slid and is restricted from sliding again. The locking piece 15 corresponds exactly to the unlocking block 17. Since the end of the locking member 15 facing the active rack frame 11 is the hook end, and the other end is the pressing end, and since the unlocking block 17 is an integrated structure set on the frame cavity wall of the main frame plate 3 facing outward, and it is provided with an inclined side wall on the side facing the pressing end of the locking member 15, and the unlocking block 17 is connected to the pressing end of the locking member 15 by pushing, when the driven rack frame 12 is driven to slide, the locking member 15 slides with the driven rack frame 12 and is in contact with the unlocking block 17. When the driven rack frame 12 has completely slid, the pressing end of the locking member 15 slides along the inclined side wall of the unlocking block 17 onto the unlocking block 17, so that the pressing end of the locking member 15 is pushed and driven to perform a flipping motion; Since the driven rack frame 12 has a guide groove that matches the circular guide post in the driving rack frame 11, and since the locking member 15 has a rotatable shaft inserted in the middle, the locking member 15 is movably locked on the guide groove wall of the driven rack frame 12 after being installed, and the shaft is fixedly inserted into the guide groove wall of the driven rack frame 12. After being pushed by the unlocking block 17, the locking member 15 flips inside the driven rack frame 12. Since the locking component 15 has a spring compartment in the middle, a first torsion spring 16 is installed at the flip connection between the locking component 15 and the driven rack frame 12. After the first torsion spring 16 is placed, it is located in the spring compartment of the locking component 15 and is movably sleeved on the outside of the shaft column in the locking component 15. One end of it is fixedly inserted into the wall of the spring compartment, and the other end is fixedly inserted into the guide groove wall of the driven rack frame 12. After the locking component 15 is driven to flip, the first torsion spring 16 is compressed and undergoes elastic deformation. Since both sides of the active rack frame 11 are vertically provided with integrated circular guide post portions, after the active rack frame 11 and the driven rack frame 12 are connected, the two sides of the active rack frame 11 are respectively overlapped and attached to the two driven rack frames 12. The two circular guide posts in the active rack frame 11 are respectively movably locked in the two guide grooves in the driven rack frame 12, so that the driven rack frame 12 is positioned on the active rack frame 11 in a movable state. Since the locking member 15 is connected to the active rack frame 11 by a locking method, after the locking member 15 is driven to flip, the hook end in the locking member 15 and the circular guide post portion in the active rack frame 11 lose the locking effect, releasing the lock between the driven rack frame 12 and the active rack frame 11. After the locking member 15 is unlocked, the active rack frame 11 and the driven rack frame 12 can be controlled to move independently. Since the driving rack 11 and the driven rack 12 are connected by a sliding mechanism, and since a spring compartment extends from the guide groove in the driven rack 12, a connecting spring 14 is provided at the connection between the driving rack 11 and the driven rack 12 for elastic support. The connecting spring 14 is movably inserted into the spring compartment in the driven rack 12, with one end pressing against the compartment wall and the other end pressing against the circular guide post in the driving rack 11. When the driven rack 12 has completely slid... Unable to slide again due to restriction, the second electric telescopic rod 13 is activated to continuously extend and operate, driving the active rack frame 11 to slide continuously in the frame cavity wall at the outer end of the main frame plate 3, and causing the active rack frame 11 to slide against the restricted driven rack frame 12. At this time, the round guide column part in the active rack frame 11 slides in the guide groove in the driven rack frame 12, compressing the linkage spring 14 to cause it to undergo elastic deformation. After the active rack frame 11 is driven to slide continuously, it engages with the linkage gear 21. Because the active rack frame 11 has a through slot, the slot is symmetrical about its horizontal central axis. The two slots correspond to the connecting gears 21 on the two secondary frame plates 5 respectively. The rack part in the active rack frame 11 is integrally set on the wall of the slot. The connecting gear 21 has an integrally set shaft column at its center, and a bearing is fixedly connected to the shaft column. After the connecting gear 21 is installed, it moves through the slot in the active rack frame 11 and is movably locked in the frame cavity wall at the outer end of the main frame plate 3. The shaft column and the bearing are inserted into the frame cavity wall at the outer end of the main frame plate 3. The rack part in the active rack frame 11 is meshed with the connecting gear 21. After the active rack frame 11 is driven to slide continuously, the meshing action between the active rack frame 11 and the connecting gear 21 drives the connecting gear 21 to rotate in the frame cavity wall at the outer end of the main frame plate 3. Because the driven gear 20 has an integrated shaft at its center, with a bearing fixedly attached to the shaft, the driven gear 20 is movably mounted in the inner end of the secondary frame plate 5 after installation. The shaft, along with the bearing, is inserted into the inner end of the secondary frame plate 5, and the shaft extends outward through the shaft in the secondary frame plate 5. Furthermore, the connecting gear 21 is sleeved on and fixedly connected to the extended end of the shaft in the driven gear 20 with bolts after installation. When the connecting gear 21 is driven to rotate, it forms a coaxial rotation structure with the driven gear 20, allowing the driven gear 20 to rotate in the inner end of the secondary frame plate 5 with the assistance of its shaft. Since the maximum rotation angle of the connecting gear 21 is ninety degrees, and the specifications and dimensions of the connecting gear 21 are the same as those of the driven gear 20, after the connecting gear 21 is driven to rotate, it drives the driven gear 20 to rotate coaxially, so that the rotation angle of the connecting gear 21 is the same as the rotation angle of the driven gear 20. That is, after the connecting gear 21 rotates ninety degrees, the driven gear 20 follows suit and rotates ninety degrees. Since the end of the connecting plate 22 facing the main frame plate 3 is the inward end, and the other end is the outward end, the inward end of the connecting plate 22 is provided with a longitudinal rack portion 2201 in an integrated structure. The longitudinal rack portion 2201 is meshed with the driven gear 20. Since the connecting plate 22 is installed and is movably locked in the frame cavity wall in the secondary frame plate 5, after the driven gear 20 is driven to rotate, the connecting plate 22 is driven to slide in the frame cavity wall in the secondary frame plate 5 through the meshing action between the longitudinal rack portion 2201 and the driven gear 20. Because the connecting plate 22 has through slots arranged in a continuous manner, each slot corresponds to the driven two gears 23 on each sleeve frame 6. The wall of the slot in the connecting plate 22 has an integral transverse rack 2202. The center of the driven two gears 23 has an integral shaft column, on which a bearing is fixedly attached. After the driven two gears 23 are installed, they are movably attached to the cavity wall in the secondary frame plate 5. The shaft column and bearing are inserted into the cavity wall in the secondary frame plate 5. They are movably inserted into the slot of the connecting plate 22 and mesh with the transverse rack 2202. When the connecting plate 22 is driven to slide, the meshing action between the transverse rack 2202 and the driven two gears 23 causes the driven two gears 23 to rotate in the cavity wall in the secondary frame plate 5 with the assistance of the shaft column. Since the dimensions of driven gear 20 are the same as those of driven gear 23, after driven gear 20 is driven to rotate, it is transmitted to driven gear 23 through connecting plate 22, so that the rotation angle of driven gear 20 is the same as that of driven gear 23. That is, after driven gear 20 rotates 90 degrees, driven gear 23 rotates 90 degrees accordingly. Since the driven gear 23 has a spring compartment with the same center as its central shaft, a third torsion spring 24 is installed at the rotational connection between the driven gear 23 and the secondary frame plate 5. After the third torsion spring 24 is installed, it is movably inserted into the spring compartment in the driven gear 23. One end of the spring spring 24 is fixedly clamped to the wall of the spring compartment, and the other end is fixedly clamped to the frame cavity wall in the secondary frame plate 5. When the driven gear 23 is driven to rotate, the third torsion spring 24 is subjected to force and undergoes elastic deformation. Because the sleeve frame 6 has an integrated shaft column vertically installed in the middle, and a bearing is fixedly connected to the shaft column, the sleeve frame 6 is movably inserted into the cavity of the secondary frame plate 5 after installation, and the shaft column and bearing are inserted into the cavity wall of the secondary frame plate 5. Furthermore, because the driven gear 23 is installed, the shaft column is inserted into and fixedly connected to the shaft column of the sleeve frame 6 with bolts. Moreover, because the sleeve frame 6 is equipped with an ultrasonic generator 7, the driven gear 23 is driven to rotate and forms a coaxial rotation structure with the sleeve frame 6. The linkage drives the sleeve frame 6 to drive the ultrasonic generator 7 to automatically rotate and unfold in the cavity of the secondary frame plate 5. In addition, after the sleeve frame 6 is driven to rotate and unfold, it is in a vertical state corresponding to the upper part of the open channel. The upper cavity wall of the secondary frame plate 5 is used to resist and limit the movement, ensuring that the sleeve frame 6 is in a vertical state after rotating and unfolding. Conversely, by activating the second electric telescopic rod 13 to retract, the driving rack frame 11 is driven to slide back within the frame cavity wall at the outer end of the main frame plate 3. This is achieved through the meshing between the driving rack frame 11 and the connecting gear 21, and through the meshing transmission between the driven gear 20, the connecting plate 22, and the driven gear 23. Furthermore, the elastic deformation of the third torsion spring 24 causes the connecting gear 21 and the driven gear 20 to rotate back to their original positions, the connecting plate 22 to slide back to its original position, and the driven gear 23 to rotate back to its original position. This, in turn, drives the sleeve frame... 6. Reset and Fold: Since the maximum diameter of the sleeve frame 6 and the maximum width of the ultrasonic generator 7 are both smaller than the height of the cavity in the secondary frame plate 5, after the sleeve frame 6 is flipped and folded, the ultrasonic generator 7 can be completely stored in the cavity of the secondary frame plate 5. In addition, after the sleeve frame 6 is driven to flip and fold, it is stored in the cavity of the secondary frame plate 5 in a horizontal state. The lower cavity wall of the secondary frame plate 5 supports and limits the sleeve frame 6 to ensure that it is folded in a horizontal state. The secondary frame plate 5 and the sleeve frame 6 can be folded and stored in the cavity of the main frame plate 3, thus protecting the ultrasonic generator 7 by folding and storing it.

[0023] Meanwhile, in the above technical solutions, according to Figure 3 , Figure 4 , Figure 7 and Figure 10 As shown, when the active rack frame 11 is driven to slide initially, it does not yet engage with the connecting gear 21. The driven rack frame 12 slides in conjunction with the active rack frame 11 and drives the active gear 18 to rotate independently. When the active rack frame 11 continues to slide, it engages with the connecting gear 21. At this point, the active gear 18 has completed its rotation and drives the connecting gear 21 to rotate independently. Thus, when the second unfolding mechanism 4 initially operates, it first drives the secondary frame plate 5 to flip and unfold independently. After the second unfolding mechanism 4 continues to operate, it then drives the sleeve frame 6 to drive the ultrasonic generator 7 to flip and unfold independently, forming a sequential unfolding operation. Conversely, when the active rack frame 11 is driven to initially reset and slide, the elastic support of the linkage spring 14 prevents the driven rack frame 12 from synchronously resetting and sliding with the active rack frame 11, keeping the driven rack frame 12 in the sliding state and driving the linkage gear 21 to rotate independently. When the active rack frame 11 is driven to continuously reset and slide, the locking member 15 re-locks the active rack frame 11 and the driven rack frame 12. The active rack frame 11 drives the driven rack frame 12 to reset and slide, and then drives the active gear 18 to rotate. Thus, when the second unfolding mechanism 4 initially resets and operates, it first drives the sleeve frame 6 to drive the ultrasonic generator 7 to flip and fold. After the second unfolding mechanism 4 continues to reset and operate, it then drives the secondary frame plate 5 to flip and fold independently, forming a sequential folding operation.

[0024] Meanwhile, in the above technical solutions, according to Figure 3 and Figure 6 As shown, the two rack sections in the active rack frame 11 are arranged in opposite directions. The two rack sections in the active rack frame 11 can drive the two connecting gears 21 respectively, that is, they can adapt to the two secondary frame plates 5 moving in opposite directions.

[0025] Meanwhile, in the above technical solutions, according to Figure 5 and Figure 6 As shown, when the active rack frame 11 is driven to initially reset and slide, the elastic deformation of the linkage spring 14 assists in resetting and sliding the active rack frame 11. After the active rack frame 11 is driven to continuously reset and slide, it drives the driven rack frame 12 to reset and slide, causing the unlocking block 17 to lose its pushing on the locking member 15. The elastic deformation of the first torsion spring 16 drives the locking member 15 to reset and flip, so that the hook end in the locking member 15 is re-engaged with the round guide post in the active rack frame 11, and the locking between the driven rack frame 12 and the active rack frame 11 is re-established.

[0026] Specifically, in this technical solution, the first unfolding mechanism 2 operates to drive the main frame plate 3 to automatically flip and unfold or automatically flip and fold on the protective frame 1, according to... Figure 1 and Figure 2 As shown, the protective shell 1 has a square tubular structure with a shell cavity. The side of the shell cavity facing the main frame plate 3 is open and serves as the cavity opening. A limit guide plate is snapped onto the shell cavity wall of the protective shell 1 and fixedly connected by bolts. The limit guide plate is symmetrically arranged about its vertical central axis. The first electric telescopic rod 10 is parallel to the limit guide plate in the protective shell 1 after installation and is fixedly installed on the shell cavity wall of the protective shell 1 by bolts. The output end is inserted into and fixedly connected to the middle of the push block 8 by bolts. When the first electric telescopic rod 10 is activated, it retracts and operates, driving the push block 8 to slide downward. Because the limiting guide plate in the protective frame 1 has a through groove, and because the push block 8 is a square structure with an integrated shaft column on both sides, after the push block 8 is installed, it is movably locked in the gap between the two limiting guide plates in the protective frame 1. The two shaft columns are respectively movably inserted through the grooves of the two limiting guide plates in the protective frame 1 and extend outward, so that the push block 8 is positioned on the protective frame 1 in a movable state. Due to its square structure, it is restricted to linear sliding. When the push block 8 is driven to slide, the shaft column in the push block 8 slides along the groove of the limiting guide plate in the protective frame 1. Because the lower side of the cavity of the protective frame 1 is provided with an integrated connecting seat, and a shaft is inserted and fixedly connected to the connecting seat by bolts, and because the inner end of the main frame plate 3 is provided with an integrated connecting seat, after the protective frame 1 and the main frame plate 3 are connected, the connecting seat in the protective frame 1 and the connecting seat in the main frame plate 3 are misaligned and movably locked together, and the shaft on the connecting seat in the protective frame 1 moves through the connecting seat in the main frame plate 3, and the connecting seat in the protective frame 1 forms a rotating structure on the connecting seat in the main frame plate 3 with the assistance of the shaft on it; Since the end of the linkage bracket 9 facing the push block 8 is the inward end, and the other end is the outward end, with bearings fixedly engaged at both ends, the linkage bracket 9 is symmetrically arranged about the vertical central axis of the push block 8. The push block 8 drives the two linkage brackets 9 to move synchronously. Furthermore, since the end of the central column of the push block 8 is sleeved and fixedly connected to a limit ring with bolts, after the linkage bracket 9 is installed, its inward end, along with the bearing, is movably sleeved on the central column of the push block 8, and is positioned by the limit ring of the central column of the push block 8. Additionally, since the main frame plate 3 has integrated... The structure has a shaft column, the end of which is sleeved and fixedly connected to a limiting ring by bolts. After the linkage bracket 9 is installed, it is set in an inclined state with the main frame plate 3, and its outward end is connected to the bearing and movably sleeved on the shaft column of the main frame plate 3. It is positioned by the limiting ring of the shaft column of the main frame plate 3. The push block 8, the linkage bracket 9 and the main frame plate 3 are combined to form a linkage motion structure. When the push block 8 is driven to slide downward by the first electric telescopic rod 10, the linkage bracket 9 pushes the main frame plate 3 to move through the linkage motion principle, and the main frame plate 3 automatically flips and unfolds on the protective shell 1. Conversely, by starting the first electric telescopic rod 10 to extend and operate, the push block 8 is driven to slide upwards. Through the linkage principle, the connecting bracket 9 pulls the main frame plate 3 to move, and the main frame plate 3 automatically flips and folds on the protective shell 1. The main frame plate 3 can be folded and stored in the shell cavity of the protective shell 1. Since the lower side wall of the main frame plate 3 is provided with an integrated overlapping edge, after the main frame plate 3 is flipped and folded, the overlapping edge is connected to the cavity edge in the protective shell 1 by a snap-fit ​​method. The main frame plate 3 seals the cavity of the protective shell 1, so that the shell cavity of the protective shell 1 forms a closed chamber that can play a protective role. In addition, the depth dimension of the shell cavity in the protective shell 1 is greater than the thickness dimension of the main frame plate 3, so that the main frame plate 3 can be completely stored in the shell cavity of the protective shell 1 after flipping and folding.

[0027] Example 2: Based on Embodiment 1, please refer to the following: Figure 11 The technical solution shown addresses the issue that, due to the actual influence of the open channel environment, the water flow velocity in the open channel is not uniformly distributed across the same cross-section. Traditional single-point measurements cannot achieve multi-channel measurement and are easily affected by the complex flow regime in the open channel, making it difficult for the measurement results to represent the average flow velocity of the entire cross-section and affecting the measurement accuracy. By arranging multiple ultrasonic generators 7, each ultrasonic generator 7 can be adjusted in height via a third electric telescopic rod 25. Ultrasonic generators 7 at different heights can measure the water flow velocity at each layer under complex flow regimes, thereby improving the measurement accuracy.

[0028] Specifically, in this technical solution, during multi-channel measurement operations, according to... Figure 11 As shown, sleeve frames 6 are provided at both the inward and outward ends of the secondary frame plate 5, so that the sleeve frames 6 are arranged in an array, that is, multiple ultrasonic generators 7 are arranged in an array. Since the third electric telescopic rod 25 is inserted into the sleeve frame 6 and fixed together with bolts, the ultrasonic generators 7 are sleeved and fixedly installed on the output end of the third electric telescopic rod 25 after placement. The height of the ultrasonic generators 7 can be freely adjusted by the telescopic operation of the third electric telescopic rod 25, so that multiple ultrasonic generators 7 are set at different vertical heights in the same water flow cross section in the open channel, and the water flow velocity of each layer is measured respectively, so as to obtain a more accurate cross-sectional average flow velocity, thereby realizing multi-channel measurement. Since the center of the ultrasonic generator 7 and the center of the sleeve frame 6 are on the same vertical central axis, when the sleeve frame 6 is flipped and unfolded to a vertical position above the open channel, the ultrasonic generator 7 is also vertically positioned above the open channel. The ultrasonic generator 7 emits ultrasonic pulses vertically towards the water surface of the open channel. The instrument measures the time difference between the emission and reception of the sound waves, and combines this with the speed of sound in the air to determine the water level in the open channel. Based on the definite relationship between water level and flow rate inherent in the cross-sectional shape of the open channel, the instrument uses formulas to convert the measured water level into instantaneous flow rate and cumulative flow rate.

[0029] This is the entire working process of the ultrasonic open channel flow meter. Any content not described in detail in this manual is existing technology known to those skilled in the art.

[0030] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0031] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrasonic open channel flow meter, comprising: The protective frame (1) is fixedly installed on a support frame erected above the open channel; Its characteristic is that it further includes: The first unfolding mechanism (2) drives the main frame plate (3) to automatically flip and unfold or fold on the protective shell frame (1). The main frame plate (3) can be folded and stored in the shell cavity of the protective shell frame (1) and the cavity opening of the protective shell frame (1) is sealed. The second unfolding mechanism (4) drives the secondary frame plate (5) to automatically flip and unfold or fold on the main frame plate (3), and the second unfolding mechanism (4) also drives the sleeve frame (6) to automatically flip and unfold or fold on the secondary frame plate (5). The sleeve frame (6) and the ultrasonic generator (7) installed on it can be folded and stored in the cavity of the secondary frame plate (5), and the secondary frame plate (5) and the sleeve frame (6) can be folded and stored in the cavity of the main frame plate (3) to protect the ultrasonic generator (7). The second unfolding mechanism (4) includes an active rack frame (11) and a driven rack frame (12) mirrored about the horizontal central axis of the active rack frame (11). A linkage spring (14) for elastic support is provided at the connection between the active rack frame (11) and the driven rack frame (12). The driven rack frame (12) is driven by the active rack frame (11) to form a linkage sliding structure in the main frame plate (3). The driven rack frame (12) meshes with the driving gear (18) fixed on the secondary frame plate (5), and the driving gear (18) and the secondary frame plate (5) form a coaxial rotation structure. Among them, a driven gear (20) is rotatably connected inside the secondary frame plate (5), and a connecting gear (21) that can rotate coaxially with the driven gear (20) is fixedly connected to the driven gear (20). The connecting gear (21) is connected to the active rack frame (11) by meshing. Among them, the driven gear (20) is meshed with the longitudinal rack (2201) integrally set on the connecting plate (22), and the connecting plate (22) forms a sliding structure in the secondary frame plate (5). The transverse rack (2202) integrally set on the connecting plate (22) is meshed with the driven gear (23), and the driven gear (23) is fixed on the sleeve frame (6) and forms a coaxial rotation structure.

2. The ultrasonic open channel flow meter according to claim 1, characterized in that: The first unfolding mechanism (2) includes a push block (8) and a linkage bracket (9) symmetrically arranged about the vertical central axis of the push block (8). The push block (8) is driven by the first electric telescopic rod (10) to form a sliding structure on the protective frame (1), and the first electric telescopic rod (10) is fixedly installed on the protective frame (1). The inward end of the linkage bracket (9) is rotatably connected to the push block (8), and the outward end of the linkage bracket (9) is rotatably connected to the main frame plate (3).

3. The ultrasonic open channel flow meter according to claim 1, characterized in that: The active rack frame (11) is driven by the second electric telescopic rod (13) to form a sliding structure in the main frame plate (3), and the second electric telescopic rod (13) is fixedly installed in the main frame plate (3).

4. An ultrasonic open channel flow meter according to claim 3, characterized in that: The active rack frame (11) and the driven rack frame (12) are connected by a sliding manner, and a locking element (15) for locking between them is provided at the sliding connection. The locking element (15) forms a flip structure in the driven rack frame (12), and a first torsion spring (16) is installed at the flip connection. The locking element (15) and the active rack frame (11) are connected by a snap-fit ​​manner. The locking or unlocking of the locking element (15) is used to control the synchronous movement or independent movement of the active rack frame (11) and the driven rack frame (12). The locking component (15) is connected to the unlocking block (17) which is integrally set on the main frame plate (3) by pushing.

5. An ultrasonic open channel flow meter according to claim 1, characterized in that: The secondary frame plate (5) is mirrored about the horizontal centerline of the main frame plate (3), and the two secondary frame plates (5) are rotated in opposite directions on the main frame plate (3). A second torsion spring (19) is installed at the rotation connection between the secondary frame plate (5) and the main frame plate (3).

6. An ultrasonic open channel flow meter according to claim 1, characterized in that: The driven two gears (23) form a rotating structure in the secondary frame plate (5), and a third torsion spring (24) is installed at the rotating connection between the two.

7. An ultrasonic open channel flow meter according to claim 1, characterized in that: The secondary frame (5) is provided with a sleeve frame (6), and a third electric telescopic rod (25) is fixedly installed inside the sleeve frame (6). The ultrasonic generator (7) is fixedly installed on the output end of the third electric telescopic rod (25). The height of the ultrasonic generator (7) is adjusted by the third electric telescopic rod (25), and the ultrasonic generator (7) at different heights is used to measure the water flow velocity of each layer in the same cross section of the open channel.

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