Intelligent sand-removable water system without throat section

Abstract

The application provides a sand flushing intelligent no-throat section measuring water system, belonging to the field of measuring water, which comprises a no-throat section water measuring tank arranged in a channel to be measured, and a distance is provided between the bottom of the no-throat section water measuring tank and the bottom of the channel to be measured, so that a sand discharge channel is formed between the bottom of the no-throat section water measuring tank and the bottom of the channel to be measured; a controller is used to generate a detection control signal and a blocking control signal when measuring the water level, and generate a sand flushing control signal when receiving a sand flushing instruction; a water blocking component is used to block the sand discharge channel according to the blocking control signal, and open the sand discharge channel according to the sand flushing control signal, so that the sand accumulated upstream of the no-throat section water measuring tank is flushed to the downstream; a water measuring component is used to measure the water level in the channel to be measured according to the detection control signal, and send the water level to the controller. The application avoids the problem that the sand accumulation affects the measuring water precision, that is, the measuring water precision is improved.

Description

Technical Field

[0001] This invention relates to the field of water measurement, and in particular to an intelligent, throatless water measurement system capable of flushing sand. Background Technology

[0002] Water measurement in irrigation canals is of great significance for water conservation, rational irrigation, and scientific allocation of water resources in irrigation systems. It is also crucial for evaluating water transport losses and field water use efficiency in irrigation canals at all levels. Furthermore, it provides a fair and reasonable basis for collecting water fees and is an important foundation for implementing information-based management of irrigation districts.

[0003] As water price reform deepens, accurately measuring the amount of water delivered to farmers' fields has become a key aspect of the reform. Through field investigations, it was found that in some areas, farmland is irrigated by diverting river water. During the annual flood season, the river water has a high sediment content, and the existing water measurement facilities are severely silted up, which greatly affects the accuracy of the existing water measurement facilities. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent, throatless water measurement system that can flush away sediment, thereby avoiding sediment accumulation in front of the water measurement facility and improving the accuracy of water measurement.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A flushable, intelligent, throatless water measurement system includes:

[0007] A throatless measuring trough is installed in the channel to be tested, and there is a set distance between the bottom of the throatless measuring trough and the bottom of the channel to be tested, so that a sand discharge corridor is formed between the bottom of the throatless measuring trough and the bottom of the channel to be tested.

[0008] The controller is used to generate detection control signals and blocking control signals when measuring water level, and to generate sand flushing control signals when flushing sand.

[0009] A water sealing component is installed on the throatless measuring tank at the inlet position corresponding to the sand discharge corridor and connected to the controller. It is used to seal the sand discharge corridor according to the sealing control signal when measuring water, and to open the sand discharge corridor according to the sand flushing control signal after measuring water, so that the sediment accumulated upstream of the throatless measuring tank can be flushed downstream.

[0010] A water measuring component is installed on the throatless water measuring tank and connected to the controller. It is used to measure the water level data in the channel under test according to the detection control signal and send the water level data in the channel under test to the controller.

[0011] Optionally, the bottom of the channel to be measured within a certain range upstream and downstream of the intelligent throatless water measurement system is a bottom surface with a set slope.

[0012] Optionally, the slope value of the bottom of the channel to be tested within a certain range upstream and downstream of the intelligent throatless water measurement system is determined based on the parameter data of the channel to be tested; the parameter data includes sediment particle size, channel water depth, sediment density and liquid density;

[0013] The intelligent, throatless water measurement system capable of flushing sand also includes a processing component; the processing component is used to determine the starting flow velocity, stopping flow velocity, and critical slope value based on the parameter data of the channel to be tested, to determine the standard slope value based on the starting flow velocity and the stopping flow velocity, and to determine the slope value of the bottom of the channel to be tested based on the standard slope value and the critical slope value.

[0014] Optionally, the processing component uses a formula based on the silt particle size, channel water depth, silt density, and liquid density. The starting flow velocity is calculated using the formula μ. m0 = (1.2~1.4)μ OH Calculate the stopping velocity; where μ m0 For the starting flow rate, μ OH Stop flow velocity, H is the channel water depth, d is the sediment particle size, ρ s ρ is the density of the sediment, and ρ is the density of the liquid.

[0015] Optionally, the water sealing component includes: a first track, a second track, a water sealing gate, a first frame upright, a second frame upright, a frame crossbar, a screw jack, and a screw.

[0016] The first track and the second track are respectively embedded on both sides of the throatless measuring tank and are located at the inlet of the sand discharge corridor;

[0017] The first frame upright and the second frame upright are respectively located in the first track and the second track, and the two ends of the frame crossbar are respectively welded to the first frame upright and the second frame upright;

[0018] The water-sealing gate is installed between the first frame upright and the second frame upright, and there is a set distance between the water-sealing gate and the frame crossbar;

[0019] The top of the lead screw is connected to the lead screw jack, and the bottom of the lead screw is connected to the frame crossbar.

[0020] The screw jack is used to control the movement of the screw according to the sealing control signal or the sand flushing control signal, so as to drive the frame crossbar, the first frame upright and the second frame upright to slide in the first track and the second track, thereby driving the water sealing gate to rise and fall, so as to open or block the sand discharge corridor.

[0021] Optionally, the top of the frame crossbar is connected to the bottom of the lead screw by a thread;

[0022] The screw jack controls the screw to rotate according to the sealing control signal or the sand flushing control signal, which drives the frame crossbar to rise and fall, and in turn drives the water sealing gate to rise and fall.

[0023] Optionally, the intelligent throatless water measurement system capable of flushing sand also includes: a motor and a reducer;

[0024] The motor is connected to the controller; the reducer is connected to both the motor and the screw jack.

[0025] The motor is used to control the movement of the screw jack via the reducer under the action of the sealing control signal or the sand flushing control signal.

[0026] Optionally, the water measuring component includes:

[0027] An upstream flow stabilizing device is installed on one side upstream of the throatless measuring tank; the upstream flow stabilizing device is provided with an upstream inlet and an upstream outlet, and the upstream flow stabilizing device is connected to the throatless measuring tank through the upstream inlet and the upstream outlet;

[0028] An upstream water measuring device is installed on the upstream flow stabilizing device and connected to the controller, used to measure the water level in the upstream flow stabilizing device according to the detection and control signal;

[0029] A downstream flow stabilizing device is installed on one side downstream of the throatless measuring tank; the downstream flow stabilizing device is provided with a downstream inlet and a downstream outlet, and the downstream flow stabilizing device is connected to the throatless measuring tank through the downstream inlet and the downstream outlet;

[0030] A downstream water measuring device is installed on the downstream flow stabilizing device and connected to the controller, used to measure the water level in the downstream flow stabilizing device according to the detection and control signal.

[0031] Optionally, the upstream flow stabilization device includes: an upstream stainless steel culvert, an upstream water measuring pipe, and an upstream water sealing gate;

[0032] The upstream stainless steel culvert has an upstream inlet and an upstream outlet at both ends, and the upstream stainless steel culvert is connected to the throatless measuring tank through the upstream inlet and the upstream outlet.

[0033] The upstream water measuring pipe is installed on the upstream stainless steel culvert; the upstream water measuring device is installed at the top of the upstream water measuring pipe;

[0034] The upstream water sealing gate is located at the upstream outlet. The upstream water sealing gate is used to close the upstream outlet during water measurement, so that the water surface in the upstream water measuring pipe is in a static state. After the water measurement is completed, the upstream outlet is opened to connect the upstream outlet with the throatless water measuring tank, so that the silt deposited at the bottom of the upstream stainless steel culvert is flushed to the downstream of the throatless water measuring tank.

[0035] Optionally, the downstream flow stabilization device includes: a downstream stainless steel culvert, a downstream water measuring pipe, and a downstream water sealing gate;

[0036] The downstream stainless steel culvert has a downstream inlet and a downstream outlet at both ends, and the downstream stainless steel culvert is connected to the throatless measuring tank through the downstream inlet and the downstream outlet.

[0037] The downstream water measuring pipe is installed on the downstream stainless steel culvert; the downstream water measuring device is installed at the top of the downstream water measuring pipe;

[0038] The downstream water sealing gate is located at the downstream outlet. The downstream water sealing gate is used to close the downstream outlet during water measurement, so that the water surface in the downstream water measuring pipe is in a static state. After the water measurement is completed, the downstream outlet is opened to connect the downstream outlet with the throatless water measuring tank, so that the silt deposited at the bottom of the downstream stainless steel culvert is flushed to the downstream of the throatless water measuring tank.

[0039] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: a certain distance is set between the bottom surface of the throatless measuring flume and the bottom of the channel to be measured, so that a sand discharge corridor is formed between the bottom surface of the throatless measuring flume and the bottom of the channel to be measured; the inlet of the sand discharge corridor is blocked when measuring water, and the sand discharge corridor is opened after the water measurement is completed, so that the silt accumulated upstream of the throatless measuring flume is flushed downstream, thus avoiding the problem of silt accumulation affecting the accuracy of water measurement. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0041] Figure 1 This is a front view of the intelligent, throatless water measurement system for sand flushing according to the present invention.

[0042] Figure 2 This is a top view of the intelligent, throatless water measurement system for sand flushing according to the present invention.

[0043] Figure 3 This is a side view of the intelligent, throatless water measurement system for sand flushing according to the present invention.

[0044] Symbol explanation:

[0045] Throatless measuring tank-1, controller-2, rectangular throatless section-3, sand discharge corridor-4, water sealing gate-5, screw jack-6, screw-7, upper limit limit switch-8, lower limit limit switch-9, limit switch trigger rod-10, motor-11, reducer-12, upstream stainless steel culvert-13, upstream inlet-14, upstream outlet-15, upstream water measuring pipe-16, upstream water sealing gate-17, downstream stainless steel culvert-18, downstream inlet-19, downstream outlet-20, downstream water measuring pipe-21, downstream water sealing gate-22, upstream water measuring device-23, downstream water measuring device-24, slope-25. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The purpose of this invention is to provide an intelligent, throatless water measurement system capable of flushing away sediment. By setting a certain distance between the bottom surface of the throatless water measuring trough and the bottom of the channel to be measured, a sediment flushing corridor is formed between the bottom surface of the throatless water measuring trough and the bottom of the channel to be measured. The inlet of the sediment flushing corridor is blocked during water measurement, and the sediment flushing corridor is opened after water measurement is completed, so that the sediment accumulated upstream of the throatless water measuring trough is flushed downstream, thereby avoiding the problem of sediment accumulation affecting the accuracy of water measurement.

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] like Figures 1-3 As shown, the intelligent throatless water measurement system for sand flushing of the present invention includes: a throatless water measuring tank 1, a controller 2, a water sealing component, and a water measuring component.

[0051] The throatless measuring trough 1 is installed in the channel to be tested, and there is a set distance between the bottom of the throatless measuring trough 1 and the bottom of the channel to be tested, so that a sand discharge corridor 4 is formed between the bottom of the throatless measuring trough 1 and the bottom of the channel to be tested.

[0052] Preferably, the bottom of the channel to be measured within a certain range upstream and downstream of the intelligent throatless water measurement system for sand flushing has a bottom surface with a set slope of 25 degrees.

[0053] Controller 2 is used to generate detection control signals and sealing control signals when measuring water level, and to generate sand flushing control signals when flushing sand. Specifically, controller 2 receives instructions (sand flushing instructions or water measurement instructions) from the cloud platform, and simultaneously feeds back terminal information to the cloud platform, playing a role in transmitting information up and down the chain of command.

[0054] The water sealing component is installed on the throatless measuring tank 1 at the inlet position of the sand discharge corridor 4 and is connected to the controller 2. The water sealing component is used to seal the sand discharge corridor 4 according to the sealing control signal when measuring water, and to open the sand discharge corridor 4 according to the sand flushing control signal after the water measurement is completed, so that the silt accumulated upstream of the throatless measuring tank 1 can be flushed downstream.

[0055] Specifically, the water sealing component includes: a first track, a second track, a water sealing gate 5, a first frame upright, a second frame upright, a frame crossbar, a screw jack 6, and a screw 7.

[0056] The first track and the second track are respectively embedded on both sides of the throatless measuring tank and are located at the inlet of the sand discharge corridor.

[0057] The first frame upright and the second frame upright are located in the first track and the second track, respectively, and the two ends of the frame crossbar are welded to the first frame upright and the second frame upright, respectively.

[0058] The water-sealing gate 5 is disposed between the first frame upright and the second frame upright, and there is a set distance between the water-sealing gate 5 and the frame crossbar.

[0059] The top of the lead screw 7 is connected to the lead screw jack 6, and the bottom of the lead screw 7 is connected to the frame crossbar.

[0060] The screw jack 6 controls the movement of the screw 7 according to the blocking control signal or the sand flushing control signal, causing the frame crossbar, the first frame upright, and the second frame upright to slide in the first and second tracks, thereby raising and lowering the water-sealing gate 5 to open or seal the sand discharge channel 4. This prevents the screw 7 from directly connecting to the top of the water-sealing gate 5, which could obstruct the passage of floating debris and cause water to overflow the channel.

[0061] In one specific implementation, the top of the frame crossbar is threadedly connected to the bottom of the lead screw 7. The lead screw jack 6 controls the rotation of the lead screw 7 according to the sealing control signal or the sand flushing control signal, thereby driving the frame crossbar to rise and fall, and in turn driving the water sealing gate 5 to rise and fall. Specifically, the bottom of the lead screw 7 is connected to the frame crossbar by a nut. The nut is welded to the frame crossbar. When the lead screw 7 rotates, it causes the water sealing gate 5 to move through the nut, while the position of the lead screw 7 remains stationary, greatly reducing the complexity of the entire control mechanism's movement caused by the up-and-down movement of the lead screw 7.

[0062] Furthermore, the water sealing component also includes: an upper limit limit switch 8, a lower limit limit switch 9, and a limit switch trigger rod 10.

[0063] The upper limit limit switch 8 and the lower limit limit switch 9 are both located on the throatless water tank 1 at positions corresponding to the sealing gate 5, and the height of the upper limit limit switch 8 is higher than the height of the lower limit limit switch 9.

[0064] Both the upper limit limit switch 8 and the lower limit limit switch 9 are connected to the controller 2; when the upper limit limit switch 8 and the lower limit limit switch 9 are triggered, they send a stop signal to the controller 2. The controller 2 is also used to control the sealing gate 5 to stop its lifting and lowering movement according to the stop signal.

[0065] The limit switch trigger rod 10 is located at the top of the sealing gate 5. In one specific embodiment, the limit switch trigger rod 10 is fixedly mounted on the crossbar of the gantry frame of the sealing gate 5. When the sealing gate 5 moves up and down, the limit switch trigger rod 10 moves up and down accordingly. When the limit switch trigger rod 10 reaches the top and triggers the upper limit limit switch 8, it controls the sealing gate 5 to stop rising. Similarly, when the limit switch trigger rod 10 reaches the bottom and triggers the lower limit limit switch 9, it also controls the sealing gate 5 to stop descending.

[0066] When the sealing gate 5 rises to the position of the upper limit limit switch 8, the limit switch trigger rod 10 triggers the upper limit limit switch 8; when the sealing gate 5 falls to the position of the lower limit limit switch 9, the limit switch trigger rod 10 triggers the lower limit limit switch 9.

[0067] In this embodiment, the upper limit limit switch 8 is fixed to the slide rail with screws, serving to limit the upper limit of the sealing gate 5. The lower limit limit switch 9 is fixed to the slide rail with screws, serving to limit the lower limit of the sealing gate 5.

[0068] Furthermore, the intelligent, throatless water measurement system capable of flushing sand also includes a motor 11 and a reducer 12. The motor 11 is connected to the controller 2; the reducer 12 is connected to both the motor 11 and the screw jack 6. The motor 11 is used to control the movement of the screw jack 6 via the reducer 12 under the action of the sealing control signal or the sand flushing control signal.

[0069] The drive shaft of the reducer 12 is connected to the screw jack 6 and also to the shaft of the motor 11, which increases the torque of the motor 11.

[0070] The water measuring component is installed on the throatless water measuring tank 1 and connected to the controller 2. The water measuring component is used to measure the water level data in the channel under test according to the detection control signal and send the water level data in the channel under test to the controller 2.

[0071] Specifically, the water measuring components include: an upstream flow stabilizing device, an upstream water measuring device 23, a downstream flow stabilizing device, and a downstream water measuring device 24. Both the upstream water measuring device 23 and the downstream water measuring device 24 are radar level gauges.

[0072] The upstream flow stabilizing device is located on the upstream side of the throatless measuring tank 1. The upstream flow stabilizing device has an upstream inlet 14 and an upstream outlet 15, and the upstream flow stabilizing device is connected to the throatless measuring tank 1 through the upstream inlet 14 and the upstream outlet 15.

[0073] As one specific implementation, the upstream flow stabilization device includes: an upstream stainless steel culvert 13, an upstream water measuring pipe 16, and an upstream water sealing gate 17.

[0074] The upstream stainless steel culvert 13 has an upstream inlet 14 and an upstream outlet 15 at both ends. The upstream stainless steel culvert 13 is connected to the throatless measuring tank 1 through the upstream inlet 14 and the upstream outlet 15. The upstream stainless steel culvert 13 is mainly used to form a communication device with the upstream side of the rectangular throatless section 3, and to measure the water level through the upstream measuring pipe 16 and the upstream measuring device 23.

[0075] The upstream water measuring pipe 16 is installed on the upstream stainless steel culvert 13. The upstream water measuring device 23 is installed at the top of the upstream water measuring pipe 16. Specifically, the upstream water measuring pipe 16 is installed in the middle of the upstream stainless steel culvert 13, forming a communication device with the channel to be measured.

[0076] The upstream water-sealing gate 17 is located at the upstream outlet 15. The upstream water-sealing gate 17 is used to close the upstream outlet 15 during water measurement, so that the water surface in the upstream water measuring pipe 16 is in a static state. After the water measurement is completed, the upstream outlet 15 is opened so that the upstream outlet 15 is connected to the throatless water measuring tank 1, and the silt deposited at the bottom of the upstream stainless steel culvert 13 is flushed to the downstream of the throatless water measuring tank 1.

[0077] An upstream water measuring device 23 is installed on the upstream flow stabilizing device and connected to the controller 2. The upstream water measuring device 23 is used to measure the water level in the upstream flow stabilizing device according to the detection and control signal.

[0078] A downstream flow stabilizing device is located on the downstream side of the throatless measuring tank 1. The downstream flow stabilizing device has a downstream inlet 19 and a downstream outlet 20, and the downstream flow stabilizing device is connected to the throatless measuring tank 1 through the downstream inlet 19 and the downstream outlet 20.

[0079] As one specific implementation, the downstream flow stabilization device includes: a downstream stainless steel culvert 18, a downstream water measuring pipe 21, and a downstream water sealing gate 22.

[0080] The downstream stainless steel culvert 18 has a downstream inlet 19 and a downstream outlet 20 at both ends. The downstream stainless steel culvert 18 is connected to the throatless measuring tank 1 through the downstream inlet 19 and the downstream outlet 20. The downstream stainless steel culvert 18 is mainly used to form a communication device with the downstream side of the rectangular throatless section 3, and to measure the water level through the downstream measuring pipe 21 and the downstream measuring device 24 of the rectangular throatless section 3.

[0081] The downstream water measuring pipe 21 is installed on the downstream stainless steel culvert 18. The downstream water measuring device 24 is installed at the top of the downstream water measuring pipe 21. The downstream water measuring pipe 21 is installed in the middle of the downstream stainless steel culvert 18, forming a communication device with the channel to be measured.

[0082] The downstream water-sealing gate 22 is located at the downstream outlet 20. The downstream water-sealing gate 22 is used to close the downstream outlet 20 during water measurement, so that the water surface in the downstream water measuring pipe 21 is in a static state. After the water measurement is completed, the downstream outlet 20 is opened so that the downstream outlet 20 is connected to the throatless water measuring tank 1, and the silt deposited at the bottom of the downstream stainless steel culvert 18 is flushed to the downstream of the throatless water measuring tank 1.

[0083] The downstream water measuring device 24 is installed on the downstream flow stabilizing device and connected to the controller 2. The downstream water measuring device 24 is used to measure the water level in the downstream flow stabilizing device according to the detection control signal.

[0084] This invention elevates the throatless measuring trough 1 by a certain distance, forming a sand-discharging corridor 4 on the bottom surface of the throatless measuring trough 1. A water-sealing gate 5 is installed at the inlet of the sand-discharging corridor 4. When it is necessary to flush the silt accumulated in the forward section of the throatless measuring trough 1 to the downstream of the throatless measuring trough 1, the water-sealing gate 5 is intelligently raised. When it is necessary to measure the flow rate in the channel, the water-sealing gate 5 is intelligently lowered, so that all the water flowing in the channel flows through the throatless measuring trough 1 for flow rate measurement.

[0085] To better understand the technical solution of this invention, the following explanation is provided in conjunction with the process of measuring water.

[0086] Users send operation commands to the cloud platform via a mobile application or computer client. After the cloud platform establishes communication with the controller 2 via the 4G network, it forwards the operation commands to the controller 2. The controller 2 controls the opening and closing of the sealing gate 5 by controlling the motor 11.

[0087] In addition, the system's water measurement time and sand flushing time can be set on the cloud platform. When the system reaches the set water measurement time, it will automatically send a blocking command to the controller 2. The controller 2 controls the motor 11 to operate, and the motor 11 controls the screw 7 of the screw jack 6 to rotate through the reducer 12. The screw 7 is connected to the nut of the horizontal frame of the water sealing gate 5. When the screw 7 rotates clockwise, the water sealing gate 5 closes downwards. When the water sealing gate 5 is closed, water measurement begins. When the system reaches the set sand flushing time, it will automatically send a sand flushing command to the controller 2. The controller 2 controls the motor 11 to operate, and the motor 11 controls the screw 7 of the screw jack 6 to rotate counterclockwise through the reducer 12. The screw 7 is connected to the nut of the horizontal frame of the water sealing gate 5. When the screw 7 rotates counterclockwise, it drives the water sealing gate 5 to open upwards. The water sealing gate stops when it opens to the height set by the system, and sand flushing begins.

[0088] Some existing technologies use rectangular thin-walled weirs for intelligent water measurement, including sediment flushing and flow measurement. However, in practical applications, it has been found that in irrigation areas with relatively flat terrain, most of the canals have gentle slopes, and the water flow within the canals is mostly at a high level, with the water depth near the canal crest. In such cases, using rectangular thin-walled weirs for flow measurement can lead to flow obstruction, backwatering, and overflowing of the canals, which is detrimental to the safe operation of the irrigation canals. Therefore, it is necessary to develop a water measurement system that can measure water effectively without affecting the safe operation of the irrigation canals, while also avoiding the accuracy issues caused by the high sediment content in irrigation cement that affect the measurement accuracy of other existing water measurement facilities in irrigation areas.

[0089] Therefore, this invention calculates the corresponding flushing slope based on the sediment particles carried in the channel from the channel bottom slope at a certain distance before the throatless measuring flue, the sand discharge corridor, and the channel bottom slope at a certain distance downstream of the throatless measuring flue, so as to improve the flushing effect.

[0090] The intelligent, throatless water measurement system for flushing sand also includes a treatment component, which determines the slope value of the channel bottom slope to be measured. The slope determination process is explained in detail below:

[0091] The flow patterns of water conveyance in channels are classified into three different flow patterns based on the slope of the channel bottom: steep slope, critical slope, and gentle slope.

[0092] 1. i>i k It is a steep slope with a rapid current. The rapid current has a high velocity and is not prone to siltation.

[0093] 2. i = i k It belongs to the critical slope, and the water flow pattern is critical flow.

[0094] 3. i k It has a gentle slope, and the water flow is slow. The slow flow velocity is low, which makes it easy for sediment to accumulate at the bottom of the channel.

[0095] Where i is the bottom slope of the channel, i k This is the critical slope.

[0096] (1) Collect parameter data of the channel to be tested. The parameter data includes sediment particle size, channel water depth, maximum channel flow rate, channel bottom width, channel depth, channel slope, sediment density and liquid density.

[0097] (2) Determine the starting flow rate and stopping flow rate based on the parameter data.

[0098] Specifically, based on the sediment particle size, channel water depth, maximum channel flow rate, channel bottom width, channel depth, channel slope, sediment particle density, and liquid density, the formula is used. ​Calculate the starting flow velocity. Where μ m0 The starting flow velocity is given by H, the channel water depth is given by d, and the sediment particle size is given by ρ. s ρ is the density of the sediment, and ρ is the density of the liquid.

[0099] Based on the starting flow rate, the formula μ is used. m0 = (1.2~1.4)μ OH Calculate the stopping velocity. Where μ OH Stop flow velocity.

[0100] (3) Determine the standard slope value based on the starting flow velocity and the stopping flow velocity.

[0101] (4) Determine the critical slope value based on the parameter data.

[0102] Specifically, through the formula The critical slope value is obtained; where i k Let g be the critical slope, g be the acceleration due to gravity, and A be the acceleration due to gravity. k Where C is the cross-sectional area of ​​the water passage at the critical water depth, α is the correction factor, and C is the cross-sectional area of ​​the water passage. k R is the Chezi coefficient. k Let X be the hydraulic radius. k It is a wetted period.

[0103] The slope value of the bottom slope for on-site construction is determined based on the standard slope value and the critical slope value. Specifically, the standard slope value and the critical slope value are compared; if the standard slope value is greater than the critical slope value, the standard slope value is taken as the first actual slope value; if the critical slope value is greater than the standard slope value, the critical slope value is taken as the first actual slope value; the first actual slope value is rounded up to obtain the second actual slope value; the second actual slope value is taken as the slope value of the bottom slope for on-site construction.

[0104] Based on the slope value, the slope of the bottom of the channel to be measured and the bottom of the throatless water trough of the intelligent throatless water measurement system for sand flushing are set within a certain range upstream and downstream.

[0105] This invention employs different water measurement facilities for different channels, including different types of measuring weirs and corresponding specifications of throatless measuring flumes. To prevent siltation in front of the water measurement facilities from affecting measurement accuracy, a solution is proposed where the sealing gate of the water measurement facilities can be raised or lowered. By adjusting the channel bottom slope of the standard cross-section to a steep slope, the flow pattern is changed to a rapid flow, increasing the flow velocity. Raising the sealing gate flushes away silt, and lowering it allows for flow measurement. This completely solves the problem of siltation affecting water measurement accuracy.

[0106] This invention optimizes and improves some auxiliary structures of the traditional throatless cistern without affecting the accuracy of water measurement, while maintaining the main structure unchanged. The bottom surface of the throatless cistern is raised by a certain distance above the bottom surface of the channel to be measured. Since the channel where the throatless cistern is installed is already a channel with a gentle slope, and the bottom of the throatless cistern is raised by a certain distance, the water flow velocity in the front section of the throatless cistern should be relatively small, meeting the requirement that the Fr number in the front section is not greater than 0.5. A sediment flushing corridor is constructed between the bottom surface of the throatless measuring flume and the bottom surface of the channel to be measured. The bottom slope of the upstream section of the throatless measuring flume is 5 to 15 times the width of the channel. The bottom slope of the channel from the bottom slope of the sediment flushing corridor to the downstream of the throatless measuring flume is designed and modified to a steep slope of the same gradient based on the principle that the size of the sediment particles in the irrigation area can be eroded. This ensures that the requirements of the "Water Measurement Specification for Irrigation Channel System" (GB / T213-2017) are met: 11.1.1 The Fr number of the water flow in the channel is not greater than 0.5, and 11.1.3 There should be no siltation upstream of the measuring flume. A water-sealing gate is installed at the beginning of the sand-discharging corridor at the bottom of the throatless measuring flume. When sand flushing is needed, the water-sealing gate is intelligently raised to flush the silt accumulated during water measurement in the forward section of the throatless measuring flume to the downstream section. When water measurement is needed, the water-sealing gate is intelligently lowered to seal the inlet of the sand-discharging corridor, and the water in the channel flows through the throatless measuring flume to measure the flow rate of the channel. This avoids silt accumulation in the forward section and ensures the accuracy of the water measurement data.

[0107] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the system and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A throatless intelligent water measurement system capable of flushing sand, characterized in that, The intelligent, throatless water measurement system capable of flushing sand includes: A throatless measuring trough is installed in the channel to be tested, and there is a set distance between the bottom of the throatless measuring trough and the bottom of the channel to be tested, so that a sand discharge corridor is formed between the bottom of the throatless measuring trough and the bottom of the channel to be tested. The controller is used to generate detection control signals and blocking control signals when measuring water level, and to generate sand flushing control signals when flushing sand. A water sealing component is installed on the throatless measuring tank at the inlet position corresponding to the sand discharge corridor and connected to the controller. It is used to seal the sand discharge corridor according to the sealing control signal when measuring water, and to open the sand discharge corridor according to the sand flushing control signal after measuring water, so that the sediment accumulated upstream of the throatless measuring tank can be flushed downstream. A water measuring component is installed on the throatless water measuring tank and connected to the controller. It is used to measure the water level data in the channel under test according to the detection control signal and send the water level data in the channel under test to the controller.

2. The intelligent, throatless water measurement system for sand flushing as described in claim 1, characterized in that, The bottom of the channel to be measured within a certain range upstream and downstream of the intelligent throatless water measurement system that can flush sand has a bottom surface with a set slope. A standard cross-section travel section is set up in front of the throatless measuring flume; the bottom slope of the travel section a certain distance in front of the throatless measuring flume, the bottom slope of the sand discharge corridor, and the bottom slope of the channel within a certain distance downstream of the throatless measuring flume are designed and transformed into steep slopes of the same gradient according to the principle that the size of the sediment particles in the irrigation area can be eroded.

3. The intelligent, throatless water measurement system for sand flushing as described in claim 2, characterized in that, The slope value of the bottom of the channel under test within a certain range upstream and downstream of the intelligent throatless water measurement system is determined based on the parameter data of the channel under test; the parameter data includes sediment particle size, channel water depth, sediment density and liquid density. The intelligent, throatless water measurement system capable of flushing sand also includes a processing component; the processing component is used to determine the starting flow velocity, stopping flow velocity, and critical slope value based on the parameter data of the channel to be tested, to determine the standard slope value based on the starting flow velocity and the stopping flow velocity, and to determine the slope value of the bottom of the channel to be tested based on the standard slope value and the critical slope value.

4. The intelligent, throatless water measurement system for flushing sand as described in claim 3, characterized in that, The processing component uses a formula based on the silt particle size, channel water depth, silt density, and liquid density. The starting flow velocity is calculated using the formula μ. m0 = (1.2~1.4)μ OH Calculate the stopping velocity; where μ m0 For the starting flow rate, μ OH Stop flow velocity, H is the channel water depth, d is the sediment particle size, ρ s ρ is the density of the sediment, and ρ is the density of the liquid.

5. The intelligent, throatless water measurement system for sand flushing as described in claim 1, characterized in that, The water sealing component includes: a first track, a second track, a water sealing gate, a first frame upright, a second frame upright, a frame crossbar, a screw jack, and a screw. The first track and the second track are respectively embedded on both sides of the throatless measuring tank and are located at the inlet of the sand discharge corridor; The first frame upright and the second frame upright are respectively located in the first track and the second track, and the two ends of the frame crossbar are respectively welded to the first frame upright and the second frame upright; The water-sealing gate is installed between the first frame upright and the second frame upright, and there is a set distance between the water-sealing gate and the frame crossbar; The top of the lead screw is connected to the lead screw jack, and the bottom of the lead screw is connected to the frame crossbar. The screw jack is used to control the movement of the screw according to the sealing control signal or the sand flushing control signal, so as to drive the frame crossbar, the first frame upright and the second frame upright to slide in the first track and the second track, thereby driving the water sealing gate to rise and fall, so as to open or block the sand discharge corridor.

6. The intelligent, throatless water measurement system for sand flushing as described in claim 5, characterized in that, The top of the frame crossbar is connected to the bottom of the lead screw by a thread; The screw jack controls the screw to rotate according to the sealing control signal or the sand flushing control signal, which drives the frame crossbar to rise and fall, and in turn drives the water sealing gate to rise and fall.

7. The intelligent, throatless water measurement system for sand flushing as described in claim 5, characterized in that, The intelligent, throatless water measurement system capable of flushing sand also includes: a motor and a reducer; The motor is connected to the controller; the reducer is connected to both the motor and the screw jack. The motor is used to control the movement of the screw jack via the reducer under the action of the sealing control signal or the sand flushing control signal.

8. The intelligent, throatless water measurement system for flushing sand as described in claim 1, characterized in that, The water measuring component includes: An upstream flow stabilizing device is installed on one side upstream of the throatless measuring tank; the upstream flow stabilizing device is provided with an upstream inlet and an upstream outlet, and the upstream flow stabilizing device is connected to the throatless measuring tank through the upstream inlet and the upstream outlet; An upstream water measuring device is installed on the upstream flow stabilizing device and connected to the controller, used to measure the water level in the upstream flow stabilizing device according to the detection and control signal; A downstream flow stabilizing device is installed on one side downstream of the throatless measuring tank; the downstream flow stabilizing device is provided with a downstream inlet and a downstream outlet, and the downstream flow stabilizing device is connected to the throatless measuring tank through the downstream inlet and the downstream outlet; A downstream water measuring device is installed on the downstream flow stabilizing device and connected to the controller, used to measure the water level in the downstream flow stabilizing device according to the detection and control signal.

9. The intelligent, throatless water measurement system for flushing sand as described in claim 8, characterized in that, The upstream flow stabilization device includes: an upstream stainless steel culvert, an upstream water measuring pipe, and an upstream water sealing gate; The upstream stainless steel culvert has an upstream inlet and an upstream outlet at both ends, and the upstream stainless steel culvert is connected to the throatless measuring tank through the upstream inlet and the upstream outlet. The upstream water measuring pipe is installed on the upstream stainless steel culvert; the upstream water measuring device is installed at the top of the upstream water measuring pipe; The upstream water sealing gate is located at the upstream outlet. The upstream water sealing gate is used to close the upstream outlet during water measurement, so that the water surface in the upstream water measuring pipe is in a static state. After the water measurement is completed, the upstream outlet is opened to connect the upstream outlet with the throatless water measuring tank, so that the silt deposited at the bottom of the upstream stainless steel culvert is flushed to the downstream of the throatless water measuring tank.

10. The intelligent, throatless water measurement system for sand flushing according to claim 8, characterized in that, The downstream flow stabilization device includes: a downstream stainless steel culvert, a downstream water measuring pipe, and a downstream water sealing gate; The downstream stainless steel culvert has a downstream inlet and a downstream outlet at both ends, and the downstream stainless steel culvert is connected to the throatless measuring tank through the downstream inlet and the downstream outlet. The downstream water measuring pipe is installed on the downstream stainless steel culvert; the downstream water measuring device is installed at the top of the downstream water measuring pipe; The downstream water sealing gate is located at the downstream outlet. The downstream water sealing gate is used to close the downstream outlet during water measurement, so that the water surface in the downstream water measuring pipe is in a static state. After the water measurement is completed, the downstream outlet is opened to connect the downstream outlet with the throatless water measuring tank, so that the silt deposited at the bottom of the downstream stainless steel culvert is flushed to the downstream of the throatless water measuring tank.

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