Device and method for monitoring channel water level close to gate position at downstream of gate

Abstract

The invention discloses a device and a method for monitoring the water level of a channel close to the position of a gate downstream, aiming at a channel with an energy dissipation groove, the water level monitoring device comprises a horizontal guide plate which is fixed on the side surface of the upstream end of the energy dissipation groove and immersed in water flow, and the horizontal guide plate is used for weakening vertical low-frequency water flow disturbance; a water pressure sensor is fixed below the horizontal guide plate, a porous noise reduction layer wraps the outer side of the water pressure sensor and is used for weakening high-frequency water flow disturbance, a plurality of vertical water baffles are fixed to the position, on the periphery of the outer side of the water pressure sensor, of the bottom face of the horizontal guide plate, and the water baffles are matched with the horizontal guide plate and the channel bottom plate to form a turbulent flow resisting labyrinth. The device is used for weakening low-frequency water flow disturbance in a turbulent state. The water pressure sensor is used for monitoring the water pressure of the water flow after disturbance weakening in the channel and obtaining the water level in the channel through the monitored water pressure. According to the invention, the water flow level in a turbulent flow state in a channel close to the gate downstream can be accurately monitored.

Description

Technical Field

[0001] The invention belongs to the technical field of channel water level monitoring, and in particular relates to a channel water level monitoring device and method at a location downstream of a gate and close to a gate. Background Art

[0002] The plain river network in the Taihu Lake Basin is densely developed, and there are many gates inside the small urban embankment 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 gates.

[0003] Affected by the convergence of the gate flow section, the water body near the gate position upstream and downstream of the gate is affected by the gate water blocking and flow bypass, and the water level fluctuates greatly. Traditional liquid level monitoring requires measurement work to be carried out outside the straight river or channel that is 10 times or more the width of the river or channel at the gate, that is, the distance between the liquid level monitoring position and the gate along the channel extension direction is 10 times or more the width of the river or channel at the gate. The water level of the water body in the river or channel here is little affected by turbulence, but due to the interlacing of the river or channel, there is no installation scenario that meets the requirements of a straight river or channel that is 10 times or more the width of the river or channel at the gate, and it is impossible to reduce the interference of turbulence on the water level of the water body in the river or channel, so the accuracy of water level monitoring is greatly affected. Summary of the invention

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

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

[0006] A channel water level monitoring device located downstream of a gate and near a gate position, wherein an energy dissipation groove or a water retaining member is arranged on a channel bottom plate located downstream of the gate and near a gate position; for a channel having an energy dissipation groove, the water level monitoring device is arranged in the energy dissipation groove and comprises a horizontal guide plate fixed on the upstream end side of the energy dissipation groove and immersed in the water flow, for weakening vertical low-frequency water flow disturbances, a water pressure sensor is fixed below the horizontal guide plate, the outer side of the water pressure sensor is covered with a porous noise reduction layer, for weakening high-frequency water flow disturbances, the horizontal A plurality of vertical water baffles are fixed on the bottom surface of the guide plate on the outer side of the water pressure sensor. The plurality of water baffles cooperate with the horizontal guide plate and the channel bottom plate to form an anti-disturbance maze, which is used to weaken the low-frequency water flow disturbance in the turbulent state in all directions; for the channel with a water baffle, the water level monitoring device is arranged on the channel bottom plate at the downstream end of the water baffle, and the horizontal guide plate is fixed on the downstream end of the water baffle; the water pressure sensor is used to monitor the water pressure of the water flow in the channel after the disturbance is weakened, and the relative water level in the channel is obtained by the monitored water pressure. Furthermore, a plurality of vertical guide plates placed on the channel bottom plate are fixed on the bottom surface of the horizontal guide plate on the outer side of the anti-disturbance maze, and the orthographic projection of the vertical guide plates is arranged along the extension direction of the channel, and is used to weaken the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel.

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

[0008] Furthermore, the water baffle arranged along the channel extension direction in orthographic projection is called the first water baffle, the water baffle perpendicular to the first water baffle is called the second water baffle, and the water baffle at a certain angle to both the first water baffle and the second water baffle is called the third water baffle.

[0009] Furthermore, there are two of the first water baffle and the third water baffle, and the two first water baffles are distributed on both sides of the water pressure sensor, one of the third water baffle is arranged on the outside of the first water baffle on one side of the water pressure sensor, and the other of the third water baffle is arranged on the outside of the first water baffle on the other side of the water pressure sensor, the upstream end of each of the third water baffles is located on the outside of the channel on the corresponding side of the water pressure sensor and the downstream end is located on the inside of the channel on the corresponding side of the water pressure sensor, and there are multiple second water baffles, a part of which is arranged between the first water baffle and the third water baffle on one side of the water pressure sensor, and the rest of the second water baffles is arranged between the first water baffle and the third water baffle on the other side of the water pressure sensor; a part of the vertical guide plates are arranged at the outer side surface of the third water baffle on one side of the water pressure sensor, and the rest of the vertical guide plates are arranged at the outer side surface of the third water baffle on the other side of the water pressure sensor. Furthermore, each of the first water baffles is placed on the channel bottom plate, a certain gap is left between the bottom end of each of the third water baffles and the channel bottom plate, part of the second water baffles on each side of the water pressure sensor is placed on the channel bottom plate and a certain gap is left between the bottom end of part of the second water baffles and the channel bottom plate; energy dissipation grooves are arranged on the sides of each of the first water baffles, each of the second water baffles and each of the third water baffles, and an energy dissipation hole is opened on each of the third water baffles at a position away from the water pressure sensor.

[0010] Furthermore, a mounting plate is fixed on the bottom surface of the horizontal guide plate, and each of the first water baffle plates, each of the second water baffle plates and each of the third water baffle plates are fixed on the bottom surface of the mounting plate.

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

[0012] Furthermore, the horizontal guide plate is semicircular and the upstream end face is a vertical plane perpendicular to the extension direction of the channel. For a channel with an energy dissipation groove, the upstream end face of the horizontal guide plate is parallel to the upstream end side face of the energy dissipation groove and is fixed on the upstream end side face of the energy dissipation groove. For a channel with a water retaining member, the upstream end face of the horizontal guide plate is parallel to the downstream end face of the water retaining member and is fixed on the downstream end face of the water retaining member. The vertical guide plate is in the shape of a right-angled triangle. A method for monitoring the water level of a channel near a gate position downstream of a gate, using the above-mentioned channel water level monitoring device near the gate position downstream of the gate for monitoring, specifically: the water flow upstream of the gate in the channel passes through the gate and the energy dissipation groove in sequence and flows downstream, or the water flow upstream of the gate in the channel passes through the gate and the water retaining member in sequence and flows downstream, so that the channel water level monitoring device is immersed in the water flow in a turbulent state, and the vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate, and then the water flow enters the anti-turbance maze and flows toward the porous noise reduction layer through the gap between adjacent water retaining plates, and the low-frequency water flow disturbance in the water flow in each direction of turbulence is weakened by each water retaining plate in the anti-turbance maze, and 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, and 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, and the relative water level in the channel is obtained by the monitored water pressure.

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

[0014] The channel water level monitoring device at the downstream of the gate near the gate position in the present invention is provided with an energy dissipation groove or a water retaining member on the channel bottom plate near the gate position downstream of the gate. For the channel with the energy dissipation groove, the water level monitoring device is arranged in the energy dissipation groove and includes a horizontal guide plate fixed on the upstream end side of the energy dissipation groove and immersed in the water flow, which is used to weaken the vertical low-frequency water flow disturbance. A water pressure sensor is fixed below the horizontal guide plate, and the outer side of the water pressure sensor is covered with a porous noise reduction layer, which is used to weaken the high-frequency water flow disturbance and weaken the horizontal guide plate. A plurality of vertical water retaining plates are fixed on the bottom surface of the horizontal guide plate around the outer side of the water pressure sensor. The plurality of water retaining plates cooperate with the horizontal guide plate and the channel bottom plate to form an anti-disturbance maze, which is used to weaken the low-frequency water flow disturbance in the turbulent state in all directions; for the channel with the water retaining member, the water level monitoring device is arranged on the channel bottom plate at the downstream end of the water retaining member, and the horizontal guide plate is fixed at the downstream end of the water retaining member; the weakened water pressure sensor is used to monitor the water pressure of the water flow in the channel after the disturbance is weakened, And the relative water level in the channel is obtained by the monitored water pressure; when the channel water level monitoring device at the downstream of the gate near the gate position of the present invention is used for water level monitoring, specifically: the water flow upstream of the gate in the channel passes through the gate and the energy dissipation groove in turn and flows downstream, or the water flow upstream of the gate in the channel passes through the gate and the water retaining member in turn and flows downstream, so that the channel water level monitoring device is immersed in the water flow in a turbulent state, and the vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate, and then the water flow enters the anti-turbance maze and flows toward the porous noise reduction layer through the gap between adjacent water retaining plates, and the low-frequency water flow disturbance in the water flow in each direction of turbulence is weakened by each water retaining plate in the anti-turbance maze, and 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, and then the water flow reaches the water pressure sensor, and the water pressure of the water flow after the disturbance is reduced in the channel is monitored by the water pressure sensor, and the relative water level in the channel is obtained by the monitored water pressure. In this way, the vertical low-frequency water flow disturbance in the water flow can be weakened by the horizontal guide plate, the low-frequency water flow disturbance in the water flow in all directions of turbulence can be weakened by the water retaining plates in the anti-disturbance maze, and the high-frequency water flow disturbance in the water flow can be weakened by the porous noise reduction layer, so that the water flow reaching the water pressure sensor is the water flow with reduced disturbance, so that the water level in the turbulent state in the channel near the gate position downstream of the gate can be monitored more accurately. Therefore, the water level of the water flow in the channel near the gate position downstream of the gate is less affected by the turbulence.

[0015] In the present invention, a plurality of vertical guide plates placed on the bottom plate of the channel are fixed on the bottom surface of the horizontal guide plate outside the anti-disturbance maze, and the orthographic projection of the vertical guide plates is arranged along the extension direction of the channel, and is used to weaken the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel. In this way, the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel in the water flow can be weakened by the vertical guide plates, so that the water flow reaching the water pressure sensor is the water flow after the disturbance is weakened, so that the water level in the turbulent state in the channel near the gate position downstream of the gate can be more accurately monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a channel water level monitoring device in the present invention for a channel with an energy dissipation trough;

[0017] Figure 2 for Figure 1 The enlarged structural diagram of the hidden gate, energy dissipation trough and channel bottom plate;

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

[0019] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure in another direction after the porous noise reduction layer is hidden;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the channel water level monitoring device in the present invention for a channel with a water retaining member.

[0021] Explanation of the reference numerals in the figure: 1. gate, 2. energy dissipation trough, 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-turbance flow maze, 4061. first water baffle, 4062. second water baffle, 4063. third water baffle, 40631. energy dissipation hole, 407. mounting plate, 5. water baffle. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0026] like Figure 1-Figure 5 As shown, a channel water level monitoring device is provided at a location downstream of a gate and close to the gate. An energy dissipation groove 2 or a water retaining member 5 is provided in the channel downstream of the gate and close to the gate 1. Figure 1-Figure 4 As shown, for a channel with an energy dissipation trough 2, a channel water level monitoring device 4 is arranged in the energy dissipation trough 2, and includes a horizontal guide plate 401 fixed on the upstream end side of the energy dissipation trough 2 and immersed in the water flow, which is used to weaken the vertical low-frequency water flow disturbance, and a water pressure sensor 402 is fixed below the horizontal guide plate 401, and the outer side of the water pressure sensor 402 is covered with a porous noise reduction layer 403, wherein the porous noise reduction layer 403 is a porous sponge, which is used to weaken the high-frequency water flow disturbance, and a plurality of vertical water baffles are fixed on the bottom surface of the horizontal guide plate 401 around the outer side of the water pressure sensor 402, and the plurality of water baffles cooperate with the horizontal guide plate 401 and the channel bottom plate 3 to form an anti-disturbance maze 406, which is used to weaken the low-frequency water flow disturbance in the isotropic turbulent state; as shown in FIG. Figure 5 As shown, for a channel with a water retaining member 5, a channel water level monitoring device 4 is arranged on the channel bottom plate 3 at the downstream end of the water retaining member 5, wherein Figure 5 The channel water level monitoring device 4 and Figure 1The channel water level monitoring device 4 has the same structure, the horizontal guide plate 401 is fixed to the downstream end of the water retaining member 5; the water pressure sensor 402 is used to monitor the water pressure of the water flow in the channel after the disturbance is weakened, and the relative water level in the channel is obtained through the monitored water pressure. Figure 1 and Figure 5 The direction indicated by the arrow A is the direction of water flow in the channel.

[0027] When the channel water level monitoring device of the present invention is used for water level monitoring at the downstream of the gate near the gate position, specifically: the water flow upstream of the gate 1 in the channel passes through the gate 1 and the energy dissipation trough 2 in sequence and flows downstream, or the water flow upstream of the gate 1 in the channel passes through the gate 1 and the water retaining member 5 in sequence and flows downstream, so that the channel water level monitoring device 4 is immersed in the water flow in a turbulent state, and 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-turbance maze 406 and flows toward the porous noise reduction layer 403 through the gap between adjacent water retaining plates, and the low-frequency water flow disturbance in the water flow in each direction of turbulence is weakened by each water retaining plate in the anti-turbance maze 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 of the water flow in the channel after the disturbance is reduced is monitored by the water pressure sensor 402, and the relative water level in the channel is obtained by the monitored water pressure. In this way, the vertical low-frequency water flow disturbance in the water flow can be weakened by the horizontal guide plate 401, the low-frequency water flow disturbance in the water flow in all directions of turbulence can be weakened by the water retaining plates in the anti-disturbance maze 406, and the high-frequency water flow disturbance in the water flow can be weakened by the porous noise reduction layer 403, so that the water flow reaching the water pressure sensor 402 is the water flow with reduced disturbance, so that the water level in the turbulent state in the channel near the gate 1 downstream of the gate 1 can be monitored more accurately. Therefore, the water level of the water flow in the channel near the gate 1 downstream of the gate 1 is less affected by the turbulence.

[0028] Among them, Figure 2-Figure 4 As shown, a plurality of vertical guide plates 404 placed on the channel bottom plate 3 are fixed on the outside of the anti-disturbance maze 406 on the bottom surface of the horizontal guide plate 401. The orthographic projection of the vertical guide plates 404 is arranged along the extension direction of the channel and is used to weaken the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel. In this way, the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel in the water flow can be weakened by each vertical guide plate 404, so that the water flow reaching the water pressure sensor 402 is the water flow after the disturbance is weakened, so that the water level in the turbulent state in the channel near the position of the gate 1 downstream can be more accurately monitored.

[0029] In one embodiment, Figure 3 and Figure 4As shown, a counterweight 405 placed on the channel bottom plate 3 is fixed on the bottom surface of the horizontal guide plate 401, 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 near the gate position downstream of the gate in the present invention can be always immersed in the water flow in the channel, so that the water pressure sensor 402 is always immersed in the water flow in the channel.

[0030] In one embodiment, Figure 3 and Figure 4 As shown, the water baffle arranged along the channel extension direction is called the first water baffle 4061, the water baffle perpendicular to the first water baffle 4061 is called the second water baffle 4062, and the water baffle at a certain angle to the first water baffle 4061 and the second water baffle 4062 is called the third water baffle 4063.

[0031] Among them, there are two first water baffles 4061 and three third water baffles 4063, the two first water baffles 4061 are distributed on both sides of the water pressure sensor 402, one third water baffle 4063 is arranged on the outside of the first water baffle 4061 on one side of the water pressure sensor 402, and the other third water baffle 4063 is arranged on the outside of the first water baffle 4061 on the other side of the water pressure sensor 402, the upstream end of each third water baffle 4063 is on the outside of the channel on the corresponding side of the water pressure sensor 402 and the downstream end is on the inside of the channel on the corresponding side of the water pressure sensor 402, and the third water baffle 4063 is arranged on the outside of the first water baffle 4061 on the other side of the water pressure sensor 402. There are multiple second water baffles 4062, a part of which are 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 baffles 4062 are arranged between the first water baffle 4061 and the third water baffle 4063 on the other side of the water pressure sensor 402; a part of the vertical guide plates 404 are arranged on the outer side surface of the third water baffle 4063 on one side of the water pressure sensor 402, and the remaining vertical guide plates 404 are arranged on the outer side surface of the third water baffle 4063 on the other side of the water pressure sensor 402.

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

[0033] Since each first water baffle 4061 is placed on the channel bottom plate 3, there is no gap between each first water baffle 4061 and the channel bottom plate 3, and the first water baffle 4061 is arranged close to the water pressure sensor 402, so that the first water baffle 4061 can prevent part of the water flow from flowing directly to the porous noise reduction layer 403 covered on the outside of the water pressure sensor 402 without being blocked; since a certain gap is left between the bottom end of each third water baffle 4063 and the channel bottom plate 3, and the third water baffle 4063 is far away from the water pressure sensor 402, the water baffle 4061 can prevent part of the water flow from flowing directly to the porous noise reduction layer 403 covered on the outside of the water pressure sensor 402 without being blocked; The arrangement makes it easier for the water flow outside the anti-turbine maze 406 to enter the anti-turbine maze 406 and flow toward the porous noise reduction layer 403 coated on the outside of the water pressure sensor 402. In addition, when the water flows through the gap between the bottom end of the third water baffle 4063 and the channel bottom plate 3, the gap between the bottom end of the third water baffle 4063 and the channel bottom plate 3 plays a role in weakening the low-frequency water flow disturbance in the water flow in an isotropic turbulent state. Similarly, since the bottom end of the second water baffle 4062 on each side of the water pressure sensor 402 is close to the channel bottom plate 3, the water pressure sensor 402 is connected to the bottom end of the second water baffle 4063. A certain gap is left between the channel bottom plate 3, so that when the water flows through the gap between the bottom end of the part of the second water baffle 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3, the gap between the bottom end of the part of the second water baffle 4062 and the channel bottom plate 3 plays a role in weakening the low-frequency water flow disturbance in the water flow in the turbulent state in all directions; since energy dissipation grooves are arranged on the sides of each first water baffle 4061, each second water baffle 4062 and each third water baffle 4063, the energy dissipation grooves can be further arranged. Enhance the effectiveness of weakening low-frequency water flow disturbance in the water flow that is in an isotropic turbulent state; since each third water baffle 4063 is provided with an energy dissipation hole 40631 at a position far away from the water pressure sensor 402, the setting of the energy dissipation hole 40631 can enable the water flow outside the third water baffle 4063 to enter the inside of the third water baffle 4063 through the energy dissipation hole 40631, and in the process of the water flow passing through the energy dissipation hole 40631, the energy dissipation hole 40631 plays a role in weakening the low-frequency water flow disturbance in the water flow that is in an isotropic turbulent state.

[0034] Preferably, if 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 first water baffle plate 4061 , each second water baffle plate 4062 and each third water baffle plate 4063 are all fixed on the bottom surface of the mounting plate 407 .

[0035] In one embodiment, the horizontal guide plate 401 is semicircular and the upstream end face is a vertical plane perpendicular to the extension direction of the channel. 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 is fixed on the upstream end side face of the energy dissipation groove 2; for a channel with a water retaining member 5, the upstream end face of the horizontal guide plate 401 is parallel to the downstream end face of the water retaining member 5 and is fixed on the downstream end face of the water retaining member 5; the vertical guide plate 404 is in the shape of a right-angled triangle.

[0036] A method for monitoring the channel water level near the gate position downstream of a gate, using the channel water level monitoring device near the gate position downstream of the gate for monitoring, specifically: the water flow upstream of the gate 1 in the channel passes through the gate 1 and the energy dissipation groove 2 in turn and flows downstream, or the water flow upstream of the gate 1 in the channel passes through the gate 1 and the water retaining member 5 in turn and flows downstream, so that the channel water level monitoring device 4 is immersed in the water flow in a turbulent state, and the vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate 401, and a large amount of residual flow flows downstream along a plurality of vertical guide plates 404, and under the constraint of the plurality of vertical guide plates 404, the vertical direction of the channel extension direction is minimized. The generation of straight lateral low-frequency water flow disturbance, that is, the lateral low-frequency water flow disturbance perpendicular to the extension direction of the channel in the water flow can be weakened by each vertical guide plate 404, and then the water flow enters the anti-turbine flow maze 406, specifically, part of the water flow enters the anti-turbine flow maze 406 through the gap between the bottom end of the third water baffle 4063 and the channel bottom plate 3, and part of the water flow enters the anti-turbine flow maze 406 through the energy dissipation hole 40631 on the third water baffle 4063, wherein in the process of the water flow passing through the gap between the bottom end of the third water baffle 4063 and the channel bottom plate 3, the gap between the bottom end of the third water baffle 4063 and the channel bottom plate 3 plays a role in weakening the low-frequency water flow disturbance in the water flow in an isotropic turbulent state. The energy dissipation holes 40631 play a role in weakening the low-frequency water flow disturbance in the water flow in an isotropic turbulent state, and part of the water flow entering the anti-disturbance flow maze 406 flows toward the porous noise reduction layer 403 through the gap between adjacent water retaining plates, and the other part flows toward the porous noise reduction layer 403 through the gap between the bottom end of the second water retaining plate 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3, wherein the gap between the adjacent water retaining plates plays a role in weakening the low-frequency water flow disturbance in the water flow in an isotropic turbulent state in the water flow during the process of the water flow passing through the gap between the adjacent water retaining plates. Use, wherein in the process of water flowing through the gap between the bottom end of the partial second water baffle 4062 on each side of the water pressure sensor 402 and the channel bottom plate 3, the gap between the bottom end of the partial second water baffle 4062 and the channel bottom plate 3 plays a role in weakening the low-frequency water flow disturbance in the water flow in an isotropic turbulent state, and after weakening, 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, and then the water flow reaches 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, wherein 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 the monitored water pressure.

[0037] In summary, the horizontal guide plate 401 can weaken the vertical low-frequency water flow disturbance in the water flow, the vertical guide plates 404 can weaken the lateral low-frequency water flow disturbance perpendicular to the channel extension direction in the water flow, the water retaining plates in the anti-disturbance maze 406 can weaken the low-frequency water flow disturbance in the water flow in all directions of turbulence, and the porous noise reduction layer 403 can weaken the high-frequency water flow disturbance in the water flow, so that the water flow reaching the water pressure sensor 402 is the water flow with weakened disturbance, so that the water level in the turbulent state in the channel near the gate 1 downstream of the gate 1 can be accurately monitored. Therefore, the water level of the water flow in the channel near the gate 1 downstream of the gate 1 is slightly affected by the turbulence.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A channel water level monitoring device downstream of a gate near the gate position, wherein an energy dissipation groove (2) or a water retaining member (5) is provided in the channel downstream of the gate (1) near the gate position; the device is characterized in that: For a channel with an energy dissipation trough (2), the water level monitoring device is arranged in the energy dissipation trough (2) and comprises a horizontal guide plate (401) fixed on the upstream side of the energy dissipation trough (2) and immersed in the water flow, used to weaken the vertical low-frequency water flow disturbance, a water pressure sensor (402) is fixed below the horizontal guide plate (401), the outer side of the water pressure sensor (402) is covered with a porous noise reduction layer (403), used to weaken the high-frequency water flow disturbance, and a plurality of porous noise reduction layers (403) are fixed on the bottom surface of the horizontal guide plate (401) around the outer side of the water pressure sensor (402) A vertical water baffle, a plurality of the water baffles cooperate with a horizontal guide plate (401) and a channel bottom plate (3) to form an anti-disturbance maze (406) for weakening low-frequency water flow disturbances in an isotropic turbulent state; for a channel with a water baffle (5), the water level monitoring device is arranged on the channel bottom plate (3) at the downstream end of the water baffle (5), and the horizontal guide plate (401) is fixed to the downstream end of the water baffle (5); the water pressure sensor (402) is used to monitor the water pressure of the water flow in the channel after the disturbance is weakened, and obtain the relative water level in the channel through the monitored water pressure.

2. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 1, characterized in that: A plurality of vertical guide plates (404) placed on the channel bottom plate (3) are fixed on the bottom surface of the horizontal guide plate (401) outside the anti-disturbance maze (406); the orthographic projections of the vertical guide plates (404) are arranged along the channel extension direction and are used to weaken lateral low-frequency water flow disturbances perpendicular to the channel extension direction.

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

4. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 2, characterized in that: The water baffle plate arranged along the channel extension direction in orthographic projection is called the first water baffle plate (4061), the water baffle plate perpendicular to the first water baffle plate (4061) is called the second water baffle plate (4062), and the water baffle plate at a certain angle to the first water baffle plate (4061) and the second water baffle plate (4062) is called the third water baffle plate (4063).

5. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 4, characterized in that: The first water baffle (4061) and the third water baffle (4063) are each comprised of two pieces. The two first water baffles (4061) are distributed on both sides of the water pressure sensor (402). One of the third water baffles (4063) is arranged on the outside of the first water baffle (4061) on one side of the water pressure sensor (402), and the other third water baffle (4063) is arranged on the outside of the first water baffle (4061) on the other side of the water pressure sensor (402). The upstream end of each of the third water baffles (4063) is located on the outside of the channel on the corresponding side of the water pressure sensor (402), and the downstream end is located on the inside of the channel on the corresponding side of the water pressure sensor (402). The second There are multiple water baffles (4062), wherein a portion of the second water baffles (4062) are 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 baffles (4062) are arranged between the first water baffle (4061) and the third water baffle (4063) on the other side of the water pressure sensor (402); wherein a portion of the vertical guide plates (404) are arranged on the outer side surface of the third water baffle (4063) on one side of the water pressure sensor (402), and the remaining vertical guide plates (404) are arranged on the outer side surface of the third water baffle (4063) on the other side of the water pressure sensor (402).

6. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 5, characterized in that: Each of the first water baffles (4061) is placed on the channel bottom plate (3), a certain gap is left between the bottom end of each of the third water baffles (4063) and the channel bottom plate (3), and part of the second water baffles (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 part of the second water baffles (4062) and the channel bottom plate (3); energy dissipation grooves are arranged on the side surfaces of each of the first water baffles (4061), each of the second water baffles (4062) and each of the third water baffles (4063), and energy dissipation holes (40631) are opened on each of the third water baffles (4063) at a position away from the water pressure sensor (402).

7. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 5, characterized in that: A mounting plate (407) is also fixed on the bottom surface of the horizontal guide plate (401), and each of the first water baffle plates (4061), each of the second water baffle plates (4062) and each of the third water baffle plates (4063) are fixed on the bottom surface of the mounting plate (407).

8. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 1, characterized in that: The porous noise reduction layer (403) is a porous sponge.

9. A channel water level monitoring device located downstream of a gate and close to the gate according to claim 2, characterized in that: The horizontal guide plate (401) is semicircular and its upstream end face is a vertical plane perpendicular to the extension direction of the channel. 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 is fixed on the upstream end side face of the energy dissipation groove (2). For a channel with a water retaining member (5), the upstream end face of the horizontal guide plate (401) is parallel to the downstream end face of the water retaining member (5) and is fixed on the downstream end face of the water retaining member (5); the vertical guide plate (404) is in the shape of a right triangle.

10. A method for monitoring the water level of a channel near the gate downstream of a gate, using the device for monitoring the water level of a channel near the gate downstream of a gate as claimed in any one of claims 1 to 9, characterized in that: Specifically, the water flow upstream of the gate (1) in the channel passes through the gate (1) and the energy dissipation groove (2) in sequence and flows downstream, or the water flow upstream of the gate (1) in the channel passes through the gate (1) and the water retaining member (5) in sequence and flows downstream, so that the channel water level monitoring device (4) is immersed in the water flow in a turbulent state, and the vertical low-frequency water flow disturbance in the water flow is weakened by the horizontal guide plate (401), and then the water flow enters the anti-disturbance maze (406) and flows to the porous The water flows in the direction of the noise reduction layer (403), and the low-frequency water flow disturbance in the water flow in the isotropic turbulence state is weakened by the water baffles in the anti-disturbance maze (406). The water then 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). The water then reaches the water pressure sensor (402), and the water pressure of the water flow in the channel after the disturbance is reduced is monitored by the water pressure sensor (402), and the relative water level in the channel is obtained by the monitored water pressure.

Images