A device and method for monitoring the water level of a channel downstream of a gate

Abstract

The application discloses a kind of channel water level monitoring device and method downstream gate close to gate position, for the channel with energy dissipation tank, water level monitoring device includes fixed on the upstream end side of energy dissipation tank and immersed in water flow horizontal flow guide plate, for weakening vertical low-frequency water flow disturbance, water pressure sensor is fixed below horizontal flow guide plate, porous noise reduction layer is covered outside water pressure sensor, for weakening high-frequency water flow disturbance, a plurality of vertical water baffle is fixed on the bottom surface of horizontal flow guide plate outside water pressure sensor, a plurality of water baffle and horizontal flow guide plate and channel bottom plate cooperate to form anti-turbulence labyrinth, for weakening low-frequency water flow disturbance in turbulent state;Water pressure sensor is used to monitor the water pressure of water flow after disturbance weakening in channel, and the water level in channel is obtained by the monitored water pressure.The application can more accurately monitor the water level of water flow in turbulent state in channel downstream gate close to gate position.

Description

Technical Field

[0001] This invention belongs to the field of channel water level monitoring technology, specifically relating to a channel water level monitoring device and method located downstream of a gate near the gate. Background Technology

[0002] The Taihu Lake Basin has a dense and well-developed river network in its plains, and there are many sluice gates in the small urban polder areas. In order to monitor the flow and liquid level of the river network, it is often necessary to install water level monitoring devices downstream of the sluice gates.

[0003] Due to the constriction of the gate's flow cross-section, the water level fluctuates significantly upstream and downstream of the gate due to the gate's obstruction and the flow around it. Traditional liquid level monitoring requires measurements to be conducted outside a straight river or channel at least 10 times the width of the channel at the gate. This means the distance between the monitoring location and the gate along the channel's extension direction must be at least 10 times the width of the river or channel at the gate. In this location, the water level is minimally affected by turbulence. However, due to the intersecting rivers or channels, there are no suitable installation scenarios that meet the requirement of a straight river or channel at least 10 times the width of the channel at the gate. This makes it impossible to reduce the interference of turbulence on the water level, thus significantly impacting the accuracy of water level monitoring. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the present invention provides a channel water level monitoring device and method at the downstream position of a gate near the gate, which can more accurately monitor the water level of the channel in a turbulent state at the downstream position of the gate.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A channel water level monitoring device is provided downstream of a gate near the gate position. An energy dissipation trough or water-blocking component is provided on the channel bottom plate downstream of the gate near the gate position. For channels with an energy dissipation trough, the water level monitoring device is arranged within the energy dissipation trough and includes a horizontal guide plate fixed to the upstream side of the energy dissipation trough and submerged in the water flow to reduce vertical low-frequency water flow disturbances. A water pressure sensor is fixed below the horizontal guide plate, and the water pressure sensor is covered with a porous noise reduction layer to reduce high-frequency water flow disturbances. Multiple vertical baffles are fixed around the bottom surface of the guide plate, circumferentially outside the water pressure sensor. These baffles, together with the horizontal guide plate and the channel bottom plate, form an anti-turbulence labyrinth to weaken low-frequency water flow disturbances in an isotropic turbulent state. For channels with baffles, the water level monitoring device is arranged on the channel bottom plate downstream of the baffle, and the horizontal guide plate is fixed to the downstream end of the baffle. The water pressure sensor monitors the water pressure of the water flow after the disturbance has been weakened within the channel, and obtains the relative water level within the channel through the monitored water pressure. Furthermore, multiple vertical guide plates are fixed on the bottom surface of the horizontal guide plate, outside the anti-turbulence labyrinth, and placed on the channel bottom plate. The orthographic projection of the vertical guide plates is arranged along the channel extension direction and is used to weaken lateral low-frequency water flow disturbances perpendicular to the channel extension direction.

[0007] Furthermore, a counterweight block is fixed on the bottom surface of the horizontal guide plate and placed on the bottom plate of the channel, and the water pressure sensor is fixed on the counterweight block.

[0008] Furthermore, the water-blocking plate arranged along the channel extension direction by orthographic projection is called the first water-blocking plate, the water-blocking plate perpendicular to the first water-blocking plate is called the second water-blocking plate, and the water-blocking plate that is at a certain angle to both the first and second water-blocking plates is called the third water-blocking plate.

[0009] Furthermore, there are two of each of the first and third baffles. The two first baffles are distributed on both sides of the water pressure sensor. One of the third baffles is located outside the first baffle on one side of the water pressure sensor, and the other third baffle is located outside the first baffle on the other side of the water pressure sensor. The upstream end of each third baffle is located outside the channel on the corresponding side of the water pressure sensor, and the downstream end is located inside the channel on the corresponding side of the water pressure sensor. There are multiple second baffles. A portion of the second baffles are located between the first and third baffles on one side of the water pressure sensor, and the remaining second baffles are located between the first and third baffles on the other side of the water pressure sensor. A portion of the vertical guide plates are located on the outer side of the third baffle on one side of the water pressure sensor, and the remaining vertical guide plates are located on the outer side of the third baffle on the other side of the water pressure sensor. Furthermore, each of the first baffle plates is placed on the channel bottom plate, and a certain gap is left between the bottom end of each of the third baffle plates and the channel bottom plate. Part of the second baffle plates on each side of the water pressure sensor are placed on the channel bottom plate, and a certain gap is left between the bottom end of the second baffle plates and the channel bottom plate. Energy dissipation grooves are arranged on the sides of each of the first baffle plates, each of the second baffle plates and each of the third baffle plates, and energy dissipation holes are opened on each of the third baffle plates at a position away from the water pressure sensor.

[0010] Furthermore, an installation plate is fixed on the bottom surface of the horizontal guide plate, and each of the first water baffles, each of the second water baffles and each of the third water baffles are fixed on the bottom surface of the installation plate.

[0011] Furthermore, the porous noise reduction layer is a porous sponge.

[0012] Furthermore, the horizontal guide plate is semi-circular and its upstream end face is a vertical plane perpendicular to the channel extension direction. For channels with energy dissipation grooves, the upstream end face of the horizontal guide plate is parallel to the upstream side face of the energy dissipation groove and fixed to the upstream side face of the energy dissipation groove. For channels with water-blocking components, the upstream end face of the horizontal guide plate is parallel to the downstream end face of the water-blocking component and fixed to the downstream end face of the water-blocking component. The vertical guide plate is a right-angled triangle. A method for monitoring channel water level downstream of a gate near the gate position, using a channel water level monitoring device located downstream of the gate near the gate position, specifically: the water flow upstream of the gate in the channel flows downstream sequentially through the gate and energy dissipation channel, or the water flow upstream of the gate in the channel flows downstream sequentially through the gate and water-blocking components, immersing the channel water level monitoring device in the turbulent water flow. The horizontal guide plate weakens the vertical low-frequency water flow disturbance in the water flow. Then the water flow enters the anti-turbulence labyrinth and flows towards the porous noise reduction layer through the gap between adjacent water-blocking plates. The water-blocking plates in the anti-turbulence labyrinth weaken the low-frequency water flow disturbance in the isotropic turbulent state of the water flow. Then the water flow enters the porous noise reduction layer, which weakens the high-frequency water flow disturbance in the water flow. Finally, the water flow reaches the water pressure sensor, which monitors the water pressure of the water flow in the channel after the disturbance has been reduced, and the relative water level in the channel is obtained from the monitored water pressure.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The present invention relates to a channel water level monitoring device located downstream of a gate near the gate. The channel bottom plate downstream of the gate near the gate is equipped with an energy dissipation trough or a water-blocking component. For channels with an energy dissipation trough, the water level monitoring device is arranged within the trough and includes a horizontal guide plate fixed to the upstream side of the trough and submerged in the water flow to reduce vertical low-frequency water flow disturbances. A water pressure sensor is fixed below the horizontal guide plate, and the outside of the water pressure sensor is covered with a porous noise reduction layer to reduce high-frequency water flow disturbances. Multiple vertical water-blocking plates are fixed around the water pressure sensor on the bottom surface of the horizontal guide plate. These water-blocking plates, together with the horizontal guide plate and the channel bottom plate, form an anti-turbulence labyrinth to reduce low-frequency water flow disturbances in an anisotropic turbulent state. For channels with a water-blocking component, the water level monitoring device is arranged on the channel bottom plate downstream of the water-blocking component, and the horizontal guide plate is fixed to the downstream end of the water-blocking component. The reduced water pressure sensor is used to monitor the water pressure of the water flow in the channel after the disturbance has been reduced. The relative water level in the channel is obtained by monitoring the water pressure. When using the channel water level monitoring device located downstream of the gate of the present invention for water level monitoring, the specific steps are as follows: the water flow upstream of the gate in the channel flows downstream through the gate and the energy dissipation channel in sequence, or the water flow upstream of the gate in the channel flows downstream through the gate and the water-blocking component in sequence, so that the channel water level monitoring device is submerged in the water flow in a turbulent state. The vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate. Then the water flow enters the anti-turbulence labyrinth and flows towards the porous noise reduction layer through the gap between adjacent water-blocking plates. The low-frequency water flow disturbance in the anisotropic turbulence state in the water flow is weakened by the water-blocking plates in the anti-turbulence labyrinth. Then the water flow enters the porous noise reduction layer and the high-frequency water flow disturbance in the water flow is weakened by the porous noise reduction layer. Then the water flow reaches the water pressure sensor and the water pressure of the water flow in the channel after the disturbance is reduced is monitored by the water pressure sensor. The relative water level in the channel is obtained by monitoring the water pressure. In this way, the horizontal guide plate can reduce the vertical low-frequency water flow disturbance in the water flow, the baffles in the anti-turbulence labyrinth can reduce the low-frequency water flow disturbance in the water flow under all-directional turbulence, and the porous noise reduction layer can reduce the high-frequency water flow disturbance in the water flow. As a result, the water flow reaching the water pressure sensor is the water flow with reduced disturbance, so that the water level in the channel under turbulence near the gate downstream of the gate can be monitored more accurately. Therefore, the water level in the channel downstream of the gate near the gate is less affected by the fluctuation of turbulence.

[0015] In this invention, multiple vertical guide plates are fixed on the bottom surface of the horizontal guide plate outside the anti-turbulence labyrinth, and placed on the channel bottom plate. The orthographic projection of the vertical guide plates is arranged along the channel extension direction and is used to weaken lateral low-frequency water flow disturbances perpendicular to the channel extension direction. In this way, the vertical guide plates can weaken the lateral low-frequency water flow disturbances perpendicular to the channel extension direction, thereby ensuring that the water flow reaching the water pressure sensor is the weakened water flow, thus enabling more accurate monitoring of the turbulent water level in the channel downstream of the gate near the gate. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of the channel water level monitoring device of the present invention is provided for channels with energy dissipation channels.

[0017] Figure 2 for Figure 1 An enlarged structural diagram showing the hidden gate, energy dissipation channel, and channel floor slab.

[0018] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure from another direction;

[0019] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure from another direction behind the hidden porous noise reduction layer;

[0020] Figure 5 A three-dimensional structural diagram of the channel water level monitoring device of the present invention is provided for channels with water-blocking components.

[0021] The following are the labels in the attached diagram: 1. Gate, 2. Energy dissipation channel, 3. Channel bottom plate, 4. Channel water level monitoring device, 401. Horizontal guide plate, 402. Water pressure sensor, 403. Porous noise reduction layer, 404. Vertical guide plate, 405. Counterweight block, 406. Anti-turbulence labyrinth, 4061. First water baffle, 4062. Second water baffle, 4063. Third water baffle, 40631. Energy dissipation hole, 407. Mounting plate, 5. Water baffle component. Detailed Implementation

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] like Figures 1-5 As shown, a channel water level monitoring device is provided downstream of a gate near the gate 1. An energy dissipation trough 2 or a water-blocking component 5 is provided in the channel downstream of gate 1 near gate 1. Figures 1-4 As shown, for a channel with an energy dissipation tank 2, a channel water level monitoring device 4 is arranged inside the energy dissipation tank 2 and includes a horizontal guide plate 401 fixed to the upstream side of the energy dissipation tank 2 and submerged in the water flow to reduce vertical low-frequency water flow disturbances. A water pressure sensor 402 is fixed below the horizontal guide plate 401. The water pressure sensor 402 is covered with a porous noise reduction layer 403, which is a porous sponge, to reduce high-frequency water flow disturbances. Multiple vertical baffles are fixed around the water pressure sensor 402 on the bottom surface of the horizontal guide plate 401. The multiple baffles, together with the horizontal guide plate 401 and the channel bottom plate 3, form an anti-turbulence labyrinth 406 to reduce low-frequency water flow disturbances in an all-directional turbulent state. Figure 5 As shown, for a channel with a water-blocking component 5, the channel water level monitoring device 4 is arranged on the channel bottom plate 3 at the downstream end of the water-blocking component 5, wherein... Figure 5 Channel water level monitoring device 4 and Figure 1The channel water level monitoring device 4 has the same structure as the one in the middle. The horizontal guide plate 401 is fixed to the downstream end of the water-blocking component 5; the water pressure sensor 402 is used to monitor the water pressure of the water flow after the disturbance in the channel, and obtain the relative water level in the channel through the monitored water pressure. Figure 1 and Figure 5 The direction indicated by the middle arrow A is the direction of water flow within the channel.

[0027] When using the channel water level monitoring device located downstream of the gate of the present invention for water level monitoring, the specific steps are as follows: the water flow upstream of the gate 1 in the channel flows downstream through the gate 1 and the energy dissipation channel 2 in sequence, or the water flow upstream of the gate 1 in the channel flows downstream through the gate 1 and the water-blocking member 5 in sequence, so that the channel water level monitoring device 4 is immersed in the water flow in a turbulent state. The vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate 401. Then the water flow enters the anti-turbulence labyrinth 406 and flows towards the porous noise reduction layer 403 through the gap between the adjacent water-blocking plates. The low-frequency water flow disturbance in the anisotropic turbulence state in the water flow is weakened by the water-blocking plates in the anti-turbulence labyrinth 406. Then the water flow enters the porous noise reduction layer 403 and the high-frequency water flow disturbance in the water flow is weakened by the porous noise reduction layer 403. Then the water flow reaches the water pressure sensor 402 and the water pressure sensor 402 monitors the water pressure of the water flow in the channel after the disturbance is reduced. The relative water level in the channel is obtained by the monitored water pressure. In this way, the horizontal guide plate 401 can reduce the vertical low-frequency water flow disturbance in the water flow, the baffles in the anti-turbulence labyrinth 406 can reduce the low-frequency water flow disturbance in the water flow under all-directional turbulence, and the porous noise reduction layer 403 can reduce the high-frequency water flow disturbance in the water flow. As a result, the water flow reaching the water pressure sensor 402 is the water flow with reduced disturbance, so the water level of the turbulent water flow in the channel downstream of the gate 1 near the gate 1 can be monitored more accurately. Therefore, the water level of the water flow in the channel downstream of the gate 1 near the gate 1 is less affected by the turbulence.

[0028] Among them, such as Figures 2-4 As shown, multiple vertical guide plates 404 are fixed on the bottom surface of the horizontal guide plate 401 outside the anti-turbulence labyrinth 406, and placed on the channel bottom plate 3. The orthographic projection of the vertical guide plates 404 is arranged along the channel extension direction and is used to weaken the lateral low-frequency water flow disturbance perpendicular to the channel extension direction. In this way, the vertical guide plates 404 can weaken the lateral low-frequency water flow disturbance perpendicular to the channel extension direction, so that the water flow reaching the water pressure sensor 402 is the water flow with weakened disturbance, thereby enabling more accurate monitoring of the water level in the turbulent state in the channel downstream of the gate 1 near the gate 1.

[0029] In one embodiment, such as Figure 3 and Figure 4As shown, a counterweight 405 is fixed on the bottom surface of the horizontal guide plate 401 and placed on the channel bottom plate 3, and the water pressure sensor 402 is fixed on the counterweight 405. In this way, by setting the counterweight 405, the channel water level monitoring device located downstream of the gate and near the gate position in this invention can always be submerged in the water flow in the channel, thereby ensuring that the water pressure sensor 402 is always submerged in the water flow in the channel.

[0030] In one embodiment, such as Figure 3 and Figure 4 As shown, the water-blocking plate arranged along the channel extension direction by orthographic projection is called the first water-blocking plate 4061, the water-blocking plate perpendicular to the first water-blocking plate 4061 is called the second water-blocking plate 4062, and the water-blocking plate that is at a certain angle to both the first water-blocking plate 4061 and the second water-blocking plate 4062 is called the third water-blocking plate 4063.

[0031] There are two first baffle plates 4061 and two third baffle plates 4063. The two first baffle plates 4061 are distributed on both sides of the water pressure sensor 402. One third baffle plate 4063 is arranged outside the first baffle plate 4061 on one side of the water pressure sensor 402, and the other third baffle plate 4063 is arranged outside the first baffle plate 4061 on the other side of the water pressure sensor 402. The upstream end of each third baffle plate 4063 is located outside the channel on the corresponding side of the water pressure sensor 402, and the downstream end is located inside the channel on the corresponding side of the water pressure sensor 402. The second baffle plate 4062 consists of multiple pieces. A portion of the second baffle plate 4062 is arranged between the first baffle plate 4061 and the third baffle plate 4063 on one side of the water pressure sensor 402, while the remaining second baffle plates 4062 are arranged between the first baffle plate 4061 and the third baffle plate 4063 on the other side of the water pressure sensor 402. A portion of the vertical guide plate 404 is arranged on the outer side of the third baffle plate 4063 on one side of the water pressure sensor 402, while the remaining vertical guide plate 404 is arranged on the outer side of the third baffle plate 4063 on the other side of the water pressure sensor 402.

[0032] Preferably, each first baffle plate 4061 is placed on the channel bottom plate 3, and a certain gap is left between the bottom end of each third baffle plate 4063 and the channel bottom plate 3. Part of the second baffle plate 4062 on each side of the water pressure sensor 402 is placed on the channel bottom plate 3, and a certain gap is left between the bottom end of the second baffle plate 4062 and the channel bottom plate 3. Energy dissipation grooves are arranged on the sides of each first baffle plate 4061, each second baffle plate 4062 and each third baffle plate 4063, and energy dissipation holes 40631 are opened on each third baffle plate 4063 at a position away from the water pressure sensor 402.

[0033] Since each first baffle plate 4061 is placed on the channel bottom plate 3, there is no gap between each first baffle plate 4061 and the channel bottom plate 3. The first baffle plate 4061 is positioned close to the water pressure sensor 402, thus preventing some water from flowing directly towards the porous noise-reducing layer 403 covering the outside of the water pressure sensor 402 without obstruction. Since there is a certain gap between the bottom of each third baffle plate 4063 and the channel bottom plate 3, and the third baffle plate 4063 is far from the water pressure sensor 402... This configuration facilitates the flow of water from the outside of the anti-turbulence labyrinth 406 into the labyrinth 406 and towards the porous noise reduction layer 403 covering the outside of the water pressure sensor 402. Furthermore, as the water flows through the gap between the bottom of the third baffle 4063 and the channel bottom plate 3, this gap weakens the low-frequency water flow disturbances in the isotropic turbulent state. Similarly, because the bottom of the second baffle 4062 on each side of the water pressure sensor 402 is close to the channel bottom plate 3... A certain gap is left between the bottom plates 3 of the channel. This gap weakens the low-frequency water flow disturbances caused by turbulence in the water flow as it passes through the gap between the bottom of the second baffle 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3. Furthermore, energy-dissipating grooves are arranged on the sides of each first baffle 4061, each second baffle 4062, and each third baffle 4063, further enhancing the energy dissipation effect. The effectiveness of reducing low-frequency water flow disturbances in an isotropic turbulent state is enhanced. Since each third baffle plate 4063 has an energy dissipation hole 40631 at a position away from the water pressure sensor 402, the energy dissipation hole 40631 allows water flow outside the third baffle plate 4063 to enter the inner side of the third baffle plate 4063 through the energy dissipation hole 40631. During the process of water flow passing through the energy dissipation hole 40631, the energy dissipation hole 40631 plays the role of reducing low-frequency water flow disturbances in an isotropic turbulent state.

[0034] Preferably, such as Figure 3 and Figure 4 As shown, a mounting plate 407 is also fixed on the bottom surface of the horizontal guide plate 401, and each of the first water baffles 4061, each of the second water baffles 4062 and each of the third water baffles 4063 are fixed on the bottom surface of the mounting plate 407.

[0035] In one embodiment, the horizontal guide plate 401 is semi-circular and its upstream end face is a vertical plane perpendicular to the channel extension direction. For a channel with an energy dissipation groove 2, the upstream end face of the horizontal guide plate 401 is parallel to the upstream end side face of the energy dissipation groove 2 and fixed to the upstream end side face of the energy dissipation groove 2. For a channel with a water-blocking member 5, the upstream end face of the horizontal guide plate 401 is parallel to the downstream end face of the water-blocking member 5 and fixed to the downstream end face of the water-blocking member 5. The vertical guide plate 404 is a right-angled triangle.

[0036] A method for monitoring channel water level downstream of a gate near the gate position, employing a channel water level monitoring device located downstream of the gate near the gate position, specifically: the water flow upstream of gate 1 in the channel flows downstream through gate 1 and energy dissipation channel 2 sequentially, or the water flow upstream of gate 1 in the channel flows downstream through gate 1 and water-blocking component 5 sequentially, immersing the channel water level monitoring device 4 in the turbulent water flow. The horizontal guide plate 401 weakens the vertical low-frequency water flow disturbance in the water flow, and a large amount of residual flow flows downstream along multiple vertical guide plates 404, minimizing the perpendicularity to the channel extension direction under the constraint of the multiple vertical guide plates 404. The generation of direct lateral low-frequency water flow disturbances, i.e., the weakening of lateral low-frequency water flow disturbances perpendicular to the channel extension direction by each vertical guide plate 404, allows the water flow to enter the anti-turbulence labyrinth 406. Specifically, part of the water flow enters the anti-turbulence labyrinth 406 through the gap between the bottom end of the third baffle plate 4063 and the channel bottom plate 3, and part of the water flow enters the anti-turbulence labyrinth 406 through the energy dissipation holes 40631 on the third baffle plate 4063. During the process of the water flow passing through the gap between the bottom end of the third baffle plate 4063 and the channel bottom plate 3, the gap between the bottom end of the third baffle plate 4063 and the channel bottom plate 3 weakens the low-frequency water flow disturbances in the isotropic turbulent state. The water flow has the effect of reducing low-frequency water flow disturbance. As the water flows through the energy dissipation holes 40631, the holes weaken the low-frequency water flow disturbances that are in an isotropic turbulent state. Part of the water entering the anti-turbulence labyrinth 406 flows towards the porous noise reduction layer 403 through the gaps between adjacent baffles, and another part flows towards the porous noise reduction layer 403 through the gaps between the bottom ends of the second baffles 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3. The gaps between adjacent baffles further weaken the low-frequency water flow disturbances that are in an isotropic turbulent state. In this process, as the water flows through the gap between the bottom end of the second baffle plate 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3, the gap between the bottom end of the second baffle plate 4062 and the channel bottom plate 3 weakens the low-frequency water flow disturbance in the anisotropic turbulent state. After weakening, the water flows into the porous noise reduction layer 403, and the high-frequency water flow disturbance in the water flow is weakened by the porous noise reduction layer 403. Then the water flows to the water pressure sensor 402, and the water pressure of the water flow in the channel after the disturbance is weakened is monitored by the water pressure sensor 402. The water pressure of the water flow in the channel is proportional to the water level, and the relative water level in the channel is obtained by monitoring the water pressure.

[0037] In summary, the horizontal guide plate 401 can reduce the vertical low-frequency water flow disturbance in the water flow, the vertical guide plates 404 can reduce the lateral low-frequency water flow disturbance perpendicular to the channel extension direction, the baffles in the anti-turbulence labyrinth 406 can reduce the low-frequency water flow disturbance in the water flow under all-directional turbulence, and the porous noise reduction layer 403 can reduce the high-frequency water flow disturbance in the water flow. As a result, the water flow reaching the water pressure sensor 402 is the water flow with reduced disturbance, so the water level in the channel under turbulence downstream of gate 1 can be accurately monitored. Therefore, the water level in the channel downstream of gate 1 near gate 1 is greatly affected by the turbulence.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A channel water level monitoring device located downstream of a gate (1) near the gate, wherein an energy dissipation trough (2) or a water-blocking component (5) is provided in the channel downstream of the gate (1) near the gate (1); characterized in that: For a channel with an energy dissipation trough (2), the water level monitoring device is arranged inside the energy dissipation trough (2) and includes a horizontal guide plate (401) fixed on the upstream side of the energy dissipation trough (2) and submerged in the water flow to reduce vertical low-frequency water flow disturbance. A water pressure sensor (402) is fixed below the horizontal guide plate (401). The water pressure sensor (402) is covered with a porous noise reduction layer (403) to reduce high-frequency water flow disturbance. Multiple pieces of water pressure sensor (402) are fixed around the bottom surface of the horizontal guide plate (401) around the outside of the water pressure sensor (402). The vertical baffle plate, together with the horizontal guide plate (401) and the channel bottom plate (3), forms an anti-turbulence labyrinth (406) to weaken the low-frequency water flow disturbance in an anisotropic turbulent state; for the channel with the baffle (5), the water level monitoring device is arranged on the channel bottom plate (3) at the downstream end of the baffle (5), and the horizontal guide plate (401) is fixed at the downstream end of the baffle (5); the water pressure sensor (402) is used to monitor the water pressure of the water flow after the disturbance is weakened in the channel, and obtain the relative water level in the channel through the monitored water pressure; On the bottom surface of the horizontal guide plate (401), there are multiple vertical guide plates (404) placed on the channel bottom plate (3) on the outside of the anti-turbulence labyrinth (406). The orthographic projection of the vertical guide plates (404) is arranged along the channel extension direction and is used to weaken the lateral low-frequency water flow disturbance perpendicular to the channel extension direction. The water-blocking plate arranged along the channel extension direction by orthographic projection is called the first water-blocking plate (4061), the water-blocking plate perpendicular to the first water-blocking plate (4061) is called the second water-blocking plate (4062), and the water-blocking plate that is at a certain angle to both the first water-blocking plate (4061) and the second water-blocking plate (4062) is called the third water-blocking plate (4063). Both the first baffle plate (4061) and the third baffle plate (4063) consist of two pieces. The two first baffle plates (4061) are distributed on both sides of the water pressure sensor (402). One of the third baffle plates (4063) is located outside the first baffle plate (4061) on one side of the water pressure sensor (402), and the other third baffle plate (4063) is located outside the first baffle plate (4061) on the other side of the water pressure sensor (402). The upstream end of each third baffle plate (4063) is located outside the channel on the corresponding side of the water pressure sensor (402), and the downstream end is located inside the channel on the corresponding side of the water pressure sensor (402). The water baffle (4062) consists of multiple pieces, with a portion of the second water baffle (4062) arranged between the first water baffle (4061) and the third water baffle (4063) on one side of the water pressure sensor (402), and the remaining second water baffle (4062) arranged between the first water baffle (4061) and the third water baffle (4063) on the other side of the water pressure sensor (402); a portion of the vertical guide plate (404) is arranged on the outer side of the third water baffle (4063) on one side of the water pressure sensor (402), and the remaining vertical guide plate (404) is arranged on the outer side of the third water baffle (4063) on the other side of the water pressure sensor (402).

2. The channel water level monitoring device located downstream of a gate near the gate according to claim 1, characterized in that: A counterweight (405) is fixed on the bottom surface of the horizontal guide plate (401) and placed on the channel bottom plate (3). The water pressure sensor (402) is fixed on the counterweight (405).

3. The channel water level monitoring device located downstream of a gate near the gate position according to claim 1, characterized in that: Each of the first baffle plates (4061) is placed on the channel bottom plate (3), and a certain gap is left between the bottom end of each of the third baffle plates (4063) and the channel bottom plate (3). A portion of the second baffle plates (4062) on each side of the water pressure sensor (402) is placed on the channel bottom plate (3) and a certain gap is left between the bottom end of the portion of the second baffle plates (4062) and the channel bottom plate (3). Energy dissipation grooves are arranged on the sides of each of the first baffle plates (4061), each of the second baffle plates (4062) and each of the third baffle plates (4063), and energy dissipation holes (40631) are opened on each of the third baffle plates (4063) at a position away from the water pressure sensor (402).

4. The channel water level monitoring device located downstream of a gate near the gate according to claim 1, characterized in that: An installation plate (407) is also fixed on the bottom surface of the horizontal guide plate (401), and each of the first water baffles (4061), each of the second water baffles (4062) and each of the third water baffles (4063) are fixed on the bottom surface of the installation plate (407).

5. A channel water level monitoring device located downstream of a gate near the gate, as described in claim 1, characterized in that: The porous noise reduction layer (403) is a porous sponge.

6. The channel water level monitoring device located downstream of a gate near the gate according to claim 1, characterized in that: The horizontal guide plate (401) is semi-circular and its upstream end face is a vertical plane perpendicular to the channel extension direction. For a channel with an energy dissipation groove (2), the upstream end face of the horizontal guide plate (401) is parallel to the upstream end side of the energy dissipation groove (2) and fixed on the upstream end side of the energy dissipation groove (2). For a channel with a water-blocking component (5), the upstream end face of the horizontal guide plate (401) is parallel to the downstream end face of the water-blocking component (5) and fixed on the downstream end face of the water-blocking component (5). The vertical guide plate (404) is a right-angled triangle.

7. A method for monitoring channel water level downstream of a gate near the gate, comprising using a channel water level monitoring device as described in any one of claims 1-6, characterized in that, Specifically, the water upstream of the gate (1) in the channel flows downstream through the gate (1) and the energy dissipation channel (2) in sequence, or the water upstream of the gate (1) in the channel flows downstream through the gate (1) and the water-blocking component (5) in sequence, so that the channel water level monitoring device (4) is submerged in the turbulent water flow. The vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate (401). Then the water flow enters the anti-turbulence labyrinth (406) and flows through the gap between the adjacent water-blocking plates to the porous surface. The noise reduction layer (403) flows in the direction of the flow and weakens the low-frequency water flow disturbance in the anisotropic turbulent state in the water flow through the baffles in the anti-turbulence labyrinth (406). Then the water flow enters the porous noise reduction layer (403) and weakens the high-frequency water flow disturbance in the water flow through the porous noise reduction layer (403). Then the water flow reaches the water pressure sensor (402) and monitors the water pressure of the water flow in the channel after the disturbance is reduced through the water pressure sensor (402). The relative water level in the channel is obtained through the monitored water pressure.

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