Pier anti-drag flow guide device and flow guide method

Abstract

The device comprises a guide plate, the guide plate comprises guide wing plates and guide blocks, the guide wing plates are rotationally arranged on the upstream and downstream of a pier through the guide blocks, the guide blocks are connected with one end of a rotation control machine, and the other end of the rotation control machine is installed on the top of the pier. The pressure sensors are installed on the two sides of the diversion wing plate installed on the upstream of the bridge pier, the pressure sensors are waterproof pressure sensors, wireless transmitters are embedded in the diversion wing plate where the pressure sensors are located, the wireless transmitters are electrically connected with the pressure sensors, and the pressure sensors are connected with a pressure receiving processor through the wireless transmitters. The pressure receiving processor and the rotation control mechanism are both connected with the controller. Along with the change of the incoming flow direction of water flow, the flow guide block can be controlled in real time to rotate, the flow guide wing plates are driven to rotate, the flow guide wing plates evenly distribute flow, the water flow pressure difference of the two sides of the upstream of the pier and the trailing vortex of the downstream of the pier are reduced, and therefore the effect of greatly reducing the resistance of the pier is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a bridge pier diversion device for reducing drag and diverting flow, and also relates to a bridge pier diversion method for reducing drag and diverting flow. Background Art

[0002] The existing bridge pier diversion devices are fixed on cylindrical bridge piers. In fact, the cylindrical bridge piers have the same bypass effect for different flow directions of the river. A large number of bridge piers are rectangular and arranged along the river. The design is basically arranged along the direction of the water flow. The riverbed of natural rivers often evolves, and the direction of the water flow changes. When the bridge piers are hit at a certain angle, that is, when the oblique water flows through the rectangular bridge piers, the bridge piers will block the water flow, forming a pressure difference on both sides of the bridge piers, which is not conducive to the stability of the bridge piers. In the downstream of the bridge piers, the Karman vortex street phenomenon will occur, which will reduce the flood discharge capacity of the river channel and cause the bridge piers to vibrate. In serious cases, the bridge will collapse. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a pier drag reduction and diversion device and a drag reduction and diversion method. The guide wing plates upstream of the pier are controlled to rotate by a controller, so that the pressures on both sides of the guide wing plates are almost the same, thereby maximally distributing the water upstream of the pier. The guide wing plates downstream of the pier can swing freely under the pressure of the water flow, thereby reducing the wake vortex and reducing the resistance of the pier.

[0004] The object of the present invention is achieved in the following manner: A pier drag reduction and diversion device comprises a guide plate, wherein the guide plate comprises a guide wing and a guide block, the guide wing is rotatably arranged at the upstream and downstream of the pier through the guide block, the guide block is connected to one end of a rotation control machine, and the other end of the rotation control mechanism is installed on the top of the pier, pressure sensors are installed on both sides of the guide wing installed upstream of the pier, the pressure sensor is a waterproof pressure sensor, a wireless transmitter is embedded in the guide wing where the pressure sensor is located, the wireless transmitter is electrically connected to the pressure sensor, the pressure sensor is connected to a pressure receiving processor through the wireless transmitter, and the pressure receiving processor and the rotation control mechanism are both connected to a controller.

[0005] In the above-mentioned bridge pier drag reduction and guide device, the guide wing plate is detachably connected to the guide block, and an arc-shaped roller sleeve adapted to the bridge pier is installed on the guide block, and rollers are installed at least at two ends of the arc-shaped roller sleeve.

[0006] In the above-mentioned bridge pier drag reduction and flow guide device, the flow guide wing plate is plugged, clamped or bolted to the flow guide block.

[0007] The above-mentioned pier drag reduction and diversion device, the rotation control mechanism upstream of the pier includes a suspension rotation mechanism, one end of the suspension rotation mechanism is hinged to the top of the guide block, the other end of the suspension rotation mechanism is hinged to the drive device, the drive device is installed on the top of the pier, and the drive device is connected to the controller.

[0008] The above-mentioned bridge pier drag reduction and diversion device, the driving device and the suspension rotation mechanism are electric telescopic rods or hydraulic telescopic rods, at least two electric telescopic rods or hydraulic telescopic rods, respectively arranged at different positions on the upper top surface of the guide block, the telescopic rod of the electric telescopic rod or the hydraulic telescopic rod is the suspension rotation mechanism, and the electric system or hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

[0009] The above-mentioned pier drag reduction and diversion device, the rotation control mechanism downstream of the pier is a flexible rope, one end of the flexible cable is fixed to the top of the pier, and the other end is fixed to the guide block; or a control mechanism is added to rotate freely, one end of the rotating rod is fixed to the guide block, and the other end is hinged to the pier, and rotates under the action of the pressure difference on both sides of the guide wing on the downstream guide block.

[0010] The above-mentioned bridge pier drag reduction and diversion device, the top surface of the diversion block is provided with a reserved lifting ring, and the reserved lifting ring is connected to one end of the rotation control mechanism.

[0011] The above-mentioned pier drag reduction and flow diversion device, the controller is installed on the top of the pier.

[0012] A method for reducing drag and diverting flow through bridge piers, comprising the following specific steps: S1. Guide blocks are installed rotatably upstream and downstream of the bridge pier, and guide wing plates are installed at the ends of the guide blocks; a pressure sensor is installed on the guide wing plate of the upstream bridge pier, and a wireless transmitter is embedded in the guide wing plate, and the pressure sensor is electrically connected to the wireless transmitter. The pressure sensor is to prevent the pressure sensor from moving. A controller and a driving device are installed on the bridge pier, and the controller is connected to the driving device and the pressure sensor. The driving device controls the guide block to move on the side of the bridge pier through a rotating control mechanism; the guide block of the downstream bridge pier is connected to the bridge pier through a flexible rope; S2. When the upstream water flow hits the guide wing installed upstream of the bridge pier, the pressure sensors on both sides of the guide wing send pressure signals to the pressure receiving processor and then sense them to the controller. The controller receives the pressure signal and compares the pressure difference with the reserved pressure threshold. When the pressure difference is greater than the threshold, the rotation control mechanism is controlled to drive the guide block to rotate toward the side with greater pressure. S3. When rotating, the pressure difference on both sides of the wing plate decreases. When the pressure difference is less than the threshold, the controller controls the rotation control mechanism to stop rotating, the rotation control mechanism stops working, and maintains the current position; S4. The guide vanes downstream of the bridge pier swing freely under the action of water flow, reducing the wake vortex and the resistance of the bridge pier.

[0013] Compared with the prior art, the present invention has the following technical effects: The present invention can control the rotation of the guide block in real time as the flow direction of the incoming water flow changes, driving the rotation of the guide wing plate, so that the guide wing plate evenly distributes the flow and reduces the pressure difference of the water flow on both sides of the bridge pier. Compared with the existing technology, its advantage is that the front-end guide changes direction at any time, and the tail is equipped with a guide plate that can change the direction of the wing plate as the water flow moves, which can reduce the vortex around the flow and reduce the resistance of the pier around the flow. The present invention can control the change of the diversion direction as the water flow direction changes, greatly reducing the pressure difference of the water flow on both sides of the upstream of the bridge pier, and the tail vortex downstream of the bridge pier, thereby achieving the effect of greatly reducing the resistance of the bridge pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the guide plate structure of the present invention.

[0016] Figure 3 This is a flow chart of the guide plate of the present invention rotating according to the pressure difference on both sides of the bridge pier. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Combine the following Figure 1-2 The specific implementation method of the present invention is described in detail.

[0022] A pier drag reduction and diversion device comprises a guide plate 1, wherein the guide plate comprises a guide wing 5 and a guide block 7, the guide wing 5 is rotatably arranged upstream and downstream of the pier 3 through the guide block 7, the guide block is connected to one end of a rotation control mechanism 2, and the other end of the rotation control mechanism is installed on the top of the pier 3, pressure sensors 6 are installed on both sides of the guide wing installed upstream of the pier, the pressure sensor is a waterproof pressure sensor, a wireless transmitter is embedded in the guide wing where the pressure sensor is located, the wireless transmitter is electrically connected to the pressure sensor, the pressure sensor is connected to a pressure receiving processor via the wireless transmitter, and the pressure receiving processor and the rotation control mechanism are both connected to a controller.

[0023] In the bridge pier drag reduction and guide device of the present invention, the guide wing plate 5 is detachably connected to the guide block 7, and the guide block 7 is installed with an arc-shaped roller sleeve 8 adapted to the bridge pier, and rollers 9 are installed at least at two ends of the arc-shaped roller sleeve.

[0024] In the bridge pier drag reduction and flow guide device of the present invention, the flow guide wing plate is plugged, clamped or bolted to the flow guide block.

[0025] The pier drag reduction and diversion device described in the present invention, the rotation control mechanism upstream of the pier includes a suspension rotation mechanism, one end of the suspension rotation mechanism is hinged to the top of the guide block, the other end of the suspension rotation mechanism is hinged to the drive device, the drive device is installed on the top of the pier, and the drive device is connected to the controller.

[0026] The bridge pier drag reduction and diversion device described in the present invention, the driving device and the suspension rotation mechanism are electric telescopic rods or hydraulic telescopic rods, at least two electric telescopic rods or hydraulic telescopic rods are respectively arranged at different positions on the upper top surface of the guide block, the telescopic rod of the electric telescopic rod or the hydraulic telescopic rod is the suspension rotation mechanism, and the electric system or hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

[0027] The pier drag reduction and diversion device described in the present invention, the rotation control mechanism downstream of the pier is a flexible rope, one end of the flexible cable is fixed to the top of the pier, and the other end is fixed to the guide block; or a control mechanism is added to rotate freely, one end of the rotating rod is fixed to the guide block, and the other end is hinged to the pier, and rotates under the action of the pressure difference on both sides of the guide wing on the downstream guide block.

[0028] In the bridge pier drag reduction and flow guide device described in the present invention, a reserved lifting ring is arranged on the top surface of the flow guide block, and the reserved lifting ring is connected to one end of the rotation control mechanism.

[0029] In the bridge pier drag reduction and flow diversion device described in the present invention, the controller is installed on the top of the bridge pier.

[0030] A method for reducing drag and diverting flow through bridge piers, comprising the following specific steps: S1. Guide blocks are installed rotatably upstream and downstream of the bridge pier, and guide wing plates are installed at the ends of the guide blocks; a pressure sensor is installed on the guide wing plate of the upstream bridge pier, and a wireless transmitter is embedded in the guide wing plate, and the pressure sensor is electrically connected to the wireless transmitter. The pressure sensor is to prevent the pressure sensor from moving. A controller and a driving device are installed on the bridge pier, and the controller is connected to the driving device and the pressure sensor. The driving device controls the guide block to move on the side of the bridge pier through a rotating control mechanism; the guide block of the downstream bridge pier is connected to the bridge pier through a flexible rope; S2. When the upstream water flow hits the guide wing installed upstream of the bridge pier, the pressure sensors on both sides of the guide wing send pressure signals to the pressure receiving processor and then sense them to the controller. The controller receives the pressure signal and compares the pressure difference with the reserved pressure threshold. When the pressure difference is greater than the threshold, the rotation control mechanism is controlled to drive the guide block to rotate toward the side with greater pressure. S3. When rotating, the pressure difference on both sides of the wing plate decreases. When the pressure difference is less than the threshold, the controller controls the rotation control mechanism to stop rotating, the rotation control mechanism stops working, and maintains the current position; S4. The guide vanes downstream of the bridge pier swing freely under the action of water flow, reducing the wake vortex and the resistance of the bridge pier.

[0031] The drag reduction and guide device of the present invention is equipped with a controllable rotating guide plate upstream of the bridge pier, and pressure sensors are symmetrically arranged on both sides of the guide wing plate; after the pressure sensors on both sides of the wing plate measure the pressure, the signal is transmitted to the controller. When the controller detects that the pressure difference increases to a certain threshold, the controller sets the pressure difference as the threshold, and the controller controls the rotation control mechanism to rotate, and the guide wing plate is rotated by the rotation control mechanism. At the same time, the controller receives the pressure signal, and when the pressure difference decreases to a certain threshold, the controller controls the rotation control mechanism to stop rotating. Figure 3In this way, the water flow in a certain direction is controlled by the guide vane to flow symmetrically around the bridge pier, reducing the pressure difference on both sides of the bridge pier, reducing the flow resistance, and ensuring the safety of the bridge pier.

[0032] The upper part of the guide block connected to the guide wing is connected to the rotation control mechanism. The upper and lower parts of the guide block side have arc-shaped roller sleeves connected to the guide block, and the rollers in the arc-shaped roller sleeves are attached to the bridge pier. When the guide wing rotates, the rollers rotate horizontally. The guide wing is installed at a certain height below the water surface from the river bottom to prevent the river bottom sediment from blocking the wing rotation.

[0033] A group of diversion devices are set up upstream and downstream of the bridge pier, with the upstream one controlled in rotation and the downstream one rotating freely.

[0034] Principle of the present invention: When oblique water flows over rectangular bridge piers, a pressure difference will be formed on both sides of the piers due to the piers' blocking effect on the water flow, which is not conducive to the stability of the piers; and a Karman vortex street phenomenon will occur downstream of the piers, reducing the river's flood-carrying capacity and causing the piers to vibrate.

[0035] The solution adopted by the present invention to solve the technical problem is: A flow guide device for reducing drag and shock on bridge piers that can be controlled to rotate, comprising a flow guide unit with a controllable rotating guide plate upstream of the bridge pier and a flow guide unit with a freely rotating tail wing guide plate downstream. The flow guide units are arranged in sequence upstream and downstream of the bridge pier from upstream to downstream, and the flow guide unit comprises an upstream guide wing plate, a guide block, a pressure sensor, an arc-shaped roller sleeve, a rotation control mechanism, a wireless transmitter, a pressure receiving processor and a controller, and the controller is installed on the bridge pier. The arc-shaped roller sleeve is installed at the top of the arc upstream of the bridge pier, and the arc-shaped roller sleeve is divided into two groups, upper and lower, and is connected to the side of the guide block as a whole; a flow guide wing plate is installed at the front end of the guide block, and pressure sensors are symmetrically installed on both sides of the guide wing plate. The pressure signal of the pressure sensor is transmitted to the pressure receiving processor through the wireless transmitter, and the pressure signal processing result instruction is transmitted to the controller. The controller controls the rotation control mechanism according to the initial operation instruction to control the flow guide device to rotate so that the flow guide wing plate faces the incoming flow direction, such as Figure 3 shown.

[0036] The downstream guide device includes a guide wing, a suspension rotating mechanism (i.e., a flexible rope), an arc roller sleeve mounted on the guide block, and the roller inside the arc roller sleeve is close to the downstream bridge pier. Under the action of water pressure on both sides, the downstream guide wing passively turns to the side with lower pressure to reduce the vortex around the flow.

[0037] As a preferred technical solution of the present invention, the guide body includes an arc-shaped roller sleeve connected to the guide block, and the guide wing plate is inserted into a reserved slot of the guide block.

[0038] As a preferred technical solution of the present invention, the guide block is made of a light and strong material, such as a resin material with a specific gravity slightly higher than that of water, and a hanging ring is reserved at the top of the guide block to be connected to the rotation control mechanism.

[0039] As a preferred technical solution of the present invention, the top of the guide block is connected to the rotation control mechanism, which is a connecting rod. The guide block is suspended at one end of the connecting rod, and the other end is connected to a swivel hinge. The swivel hinge is hinged to the telescopic end of a hydraulic telescopic rod or an electric telescopic rod. The telescopic length can be controlled by hydraulic pressure or voltage, and rotates with the rotation mechanism to make the guide body close to the bridge pier.

[0040] As a preferred technical solution of the present invention, the main controller receives the pressure difference on both sides of the guide wing, compares it with the reserved pressure threshold, and when the pressure difference is greater than the threshold, issues a rotation command to the rotation control mechanism to rotate toward the side with higher pressure.

[0041] As a preferred technical solution of the present invention, after receiving the rotation command, the controller starts the power supply to make the rotation control mechanism work. When the guide wing rotates, the pressure difference on both sides of the guide wing decreases. When the pressure difference is less than the threshold, the controller issues a stop rotation command, and the electric telescopic rod or the hydraulic telescopic rod stops working and maintains the current position.

[0042] The guide unit downstream of the pier is not equipped with a controlled rotation unit and is allowed to swing freely under the action of the water flow, thereby reducing the wake vortex and the resistance of the pier.

[0043] The rotation control mechanism and controller of the present invention can control the rotation of the guide block in real time as the flow direction of the water flow changes, so that the guide wing plate can evenly distribute the flow and reduce the pressure difference of the water flow on both sides of the bridge pier. Compared with the previous technology (the guide block fixed on the bridge pier), its advantage is that the front end of the guide can change the direction at any time, and the tail is equipped with a guide unit that can change the direction of the wing plate with the movement of the water flow, which can reduce the flow tail vortex and reduce the flow resistance of the bridge pier.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A bridge pier drag reduction and flow guide device, comprising a flow guide plate, characterized in that: The guide plate includes a guide wing and a guide block. The guide wing is rotatably arranged upstream and downstream of the pier through the guide block. The guide block is connected to one end of the rotation control machine, and the other end of the rotation control mechanism is installed on the top of the pier. Pressure sensors are installed on both sides of the guide wing installed upstream of the pier. The pressure sensor is a waterproof pressure sensor. A wireless transmitter is embedded in the guide wing where the pressure sensor is located. The wireless transmitter is electrically connected to the pressure sensor. The pressure sensor is connected to a pressure receiving processor through the wireless transmitter. The pressure receiving processor and the rotation control mechanism are both connected to the controller.

2. The pier drag reduction and flow guiding device according to claim 1, characterized in that: The guide wing plate is detachably connected to the guide block, and an arc-shaped rolling sleeve adapted to the bridge pier is installed on the guide block, and rollers are installed at least at two ends of the arc-shaped rolling sleeve.

3. The pier drag reduction and flow guiding device according to claim 2, characterized in that: The guide wing plate is plugged, clamped or bolted to the guide block.

4. The pier drag reduction and flow guiding device according to claim 3, characterized in that: The rotation control mechanism upstream of the pier includes a suspension rotation mechanism, one end of which is hinged to the top of the guide block, and the other end of which is hinged to a drive device, which is installed on the top of the pier and connected to a controller.

5. The pier drag reduction and flow guiding device according to claim 4, characterized in that: The driving device and the suspension rotation mechanism are electric telescopic rods or hydraulic telescopic rods. There are at least two electric telescopic rods or hydraulic telescopic rods, which are respectively arranged at different positions on the upper top surface of the guide block. The telescopic rod of the electric telescopic rod or the hydraulic telescopic rod is the suspension rotation mechanism, and the electric system or hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

6. The pier drag reduction and flow guiding device according to claim 3, characterized in that: The rotation control mechanism downstream of the pier is a flexible rope, one end of which is fixed to the top of the pier and the other end is fixed to the guide block; or a control mechanism is added to rotate freely, with one end of a rotating rod fixed to the guide block and the other end hinged to the pier, and rotating under the action of the pressure difference on both sides of the guide wing on the downstream guide block.

7. The pier drag reduction and flow guiding device according to claim 1, characterized in that: A reserved lifting ring is arranged on the top surface of the guide block, and the reserved lifting ring is connected to one end of the rotation control mechanism.

8. The pier drag reduction and flow guiding device according to claim 1, characterized in that: The controller is installed on the top of the pier.

9. A method for reducing drag and guiding flow on a pier using the pier drag and guiding device described in any one of items 1 to 8, characterized in that: The specific steps are as follows: S1. Guide blocks are installed rotatably upstream and downstream of the bridge pier, and guide wing plates are installed at the ends of the guide blocks; a pressure sensor is installed on the guide wing plate of the upstream bridge pier, and a wireless transmitter is embedded in the guide wing plate, and the pressure sensor is electrically connected to the wireless transmitter. The pressure sensor is to prevent the pressure sensor from moving. A controller and a driving device are installed on the bridge pier, and the controller is connected to the driving device and the pressure sensor. The driving device controls the guide block to move on the side of the bridge pier through a rotating control mechanism; the guide block of the downstream bridge pier is connected to the bridge pier through a flexible rope; S2. When the upstream water flow hits the guide wing installed upstream of the bridge pier, the pressure sensors on both sides of the guide wing send pressure signals to the pressure receiving processor and then sense them to the controller. The controller receives the pressure signal and compares the pressure difference with the reserved pressure threshold. When the pressure difference is greater than the threshold, the rotation control mechanism is controlled to drive the guide block to rotate toward the side with greater pressure. S3. When rotating, the pressure difference on both sides of the wing plate decreases. When the pressure difference is less than the threshold, the controller controls the rotation control mechanism to stop rotating, the rotation control mechanism stops working, and maintains the current position; S4. The guide vanes downstream of the bridge pier swing freely under the action of water flow, reducing the wake vortex and the resistance of the bridge pier.

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