Anti-drag flow guide device for bridge pier

Abstract

The utility model discloses a resistance reduction diversion device for a bridge pier, which comprises a diversion plate, the diversion plate comprises diversion wing plates and a diversion block, the diversion wing plates are rotatably arranged at the upstream and downstream of the bridge pier through the diversion block, the diversion block is connected with one end of a rotation control machine, and the other end of the rotation control machine is arranged at the top of the bridge 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 pressure difference of water flow on 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 utility model belongs to the technical field of hydraulic engineering, and particularly relates to a bridge pier flow guide device for reducing resistance and a bridge pier resistance reduction and flow guide method. BACKGROUND

[0002] The existing bridge pier flow guide device is fixed on a cylindrical bridge pier, and in fact, the flow effect around the cylindrical bridge pier is the same for different incoming water flow directions of the river channel. A large number of bridge piers are arranged along the river in a rectangular shape, and the design is basically arranged along the water flow direction. For natural riverbed evolution and water flow direction change, the bridge pier is impacted at a certain angle, that is, the oblique water flow passes through the rectangular bridge pier. Due to the blocking effect of the bridge pier on the water flow, a pressure difference is formed on both sides of the bridge pier, which is not conducive to the stability of the bridge pier. In the downstream of the bridge pier, the Karman vortex street phenomenon occurs, the flood discharge capacity of the river channel is reduced, and the bridge pier also vibrates, which may even cause the bridge to collapse. SUMMARY

[0003] To solve the above technical problems, the utility model provides a resistance reduction and flow guide device for a bridge pier and a resistance reduction and flow guide method. The upstream flow guide wing plate of the bridge pier is controlled to rotate by a controller, so that the pressure difference on both sides of the flow guide wing plate is approximately the same, and the upstream incoming water of the bridge pier is evenly distributed to the maximum extent. The flow guide wing plate in the downstream of the bridge pier can freely swing under the pressure of the water flow, the trailing vortex is reduced, and the resistance of the bridge pier is reduced.

[0004] The utility model is implemented in the following manner:

[0005] A resistance reduction and flow guide device for a bridge pier, comprising a flow guide plate, the flow guide plate comprising a flow guide wing plate and a flow guide block, the flow guide wing plate being rotatably arranged on the upstream and downstream of the bridge pier through the flow guide block, one end of the flow guide block being connected to a rotation control mechanism, the other end of the rotation control mechanism being installed on the top of the bridge pier, pressure sensors being installed on both sides of the flow guide wing plate installed on the upstream of the bridge pier, the pressure sensors being waterproof pressure sensors, a wireless transmitter being embedded in the flow guide wing plate where the pressure sensors are located, the wireless transmitter being electrically connected to the pressure sensors, the pressure sensors being connected to a pressure receiving processor through the wireless transmitter, and the pressure receiving processor and the rotation control mechanism being connected to a controller.

[0006] The resistance reduction and flow guide device for the bridge pier, the flow guide wing plate being detachably connected to the flow guide block, an arc-shaped rolling sleeve being installed on the flow guide block and being matched with the bridge pier, and rollers being installed at least at two ends of the arc-shaped rolling sleeve.

[0007] The resistance reduction and flow guide device for the bridge pier, the flow guide wing plate being inserted, clamped or bolted to the flow guide block.

[0008] The rotation control mechanism upstream of the bridge pier comprises a suspension rotation mechanism, one end of the suspension rotation mechanism is hinged to the top end of the flow guide block, and the other end of the suspension rotation mechanism is hinged to a driving device, and the driving device is installed on the top of the bridge pier and connected with the controller.

[0009] The driving device and the suspension rotation mechanism are electric telescopic rods or hydraulic telescopic rods, at least two of the electric telescopic rods or the hydraulic telescopic rods are arranged at different positions on the upper top surface of the flow 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 the hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

[0010] The rotation control mechanism downstream of the bridge pier is a flexible cable, one end of the flexible cable is fixed to the top of the bridge pier, and the other end of the flexible cable is fixed to the flow guide block, or a control mechanism is added to rotate freely, one end of a rotating rod is fixed to the flow guide block, and the other end of the rotating rod is hinged to the bridge pier, and the rotating rod rotates under the action of pressure difference on both sides of the flow guide wing plate downstream of the flow guide block.

[0011] The top surface of the flow guide block is provided with a reserved lifting ring, and the reserved lifting ring is connected with one end of the rotation control mechanism.

[0012] The controller is installed on the top of the bridge pier.

[0013] Compared with the prior art, the utility model has the following technical effects:

[0014] The utility model can control the rotation of the flow guide block in real time, drive the rotation of the flow guide wing plate, uniformly distribute the flow of the flow guide wing plate, and reduce the pressure difference of the water flow on both sides of the bridge pier. Compared with the prior art, the utility model has the advantages that the front end flow guide changes the direction at any time, the tail part is additionally provided with a flow guide plate capable of changing the direction of the wing plate along with the movement of the water flow, the flow around the vortex is reduced, and the flow resistance around the bridge pier is reduced. The utility model can control the change of the flow guide direction along with the change of the direction of the water flow, greatly reduce the pressure difference of the water flow on both sides of the upstream of the bridge pier and the vortex downstream of the bridge pier, and the effect of greatly reducing the flow resistance of the bridge pier is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] Figure 2 It is a structural schematic view of the flow guide plate of the utility model.

[0017] Figure 3 It is a flow chart of the rotation of the flow guide plate according to the pressure difference on both sides of the bridge pier. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment.

[0019] It should be noted that like reference numerals and letters refer to like items in the drawings, and thus once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0020] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the utility model.

[0021] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] The specific implementation method of the utility model will be described in detail below. Figures 1-2 The specific implementation method of the utility model will be described in detail below.

[0023] A kind of drag reduction fairlead for pier, including fairlead 1, the fairlead includes fairlead wing plate 5 and fairlead block 7, fairlead wing plate 5 is rotationally arranged in the upstream and downstream of pier 3 by fairlead block 7, fairlead block connects one end of rotation control mechanism 2, the other end of rotation control mechanism is installed at the top of pier 3, the fairlead wing plate of being installed in the upstream of pier is equipped with pressure sensor 6 on both sides, pressure sensor is waterproof pressure sensor, pressure sensor is in the fairlead wing plate embedded with wireless transmitter, wireless transmitter is electrically connected with pressure sensor, pressure sensor is connected pressure receiving processor by wireless transmitter, pressure receiving processor and rotation control mechanism are connected with controller.

[0024] The resistance reduction and flow guide device for bridge piers, the flow guide wing plate 5 is detachably connected on the flow guide block 7, the arc-shaped rolling sleeve 8 matched with the bridge pier is installed on the flow guide block 7, and the arc-shaped rolling sleeve is provided with at least two rolling wheels 9 at two ends.

[0025] The resistance reduction and flow guide device for bridge piers, the flow guide wing plate is inserted, clamped or bolted on the flow guide block.

[0026] The resistance reduction and flow guide device for bridge piers, the rotation control mechanism on the upstream of the bridge pier comprises a suspension rotation mechanism, one end of the suspension rotation mechanism is hinged to the top end of the flow guide block, the other end of the suspension rotation mechanism is hinged to a driving device, the driving device is installed on the top of the bridge pier, and the driving device is connected with a controller.

[0027] The resistance reduction and flow guide device for bridge piers, 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 arranged on different positions on the upper top surface of the flow 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 the hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

[0028] The resistance reduction and flow guide device for bridge piers, the rotation control mechanism on the downstream of the bridge pier is a flexible cable, one end of the flexible cable is fixed on the top of the bridge pier, and the other end is fixed on the flow guide block; or a control mechanism is added to rotate freely, one end of the rotation rod is fixed on the flow guide block, and the other end is hinged to the bridge pier; and the flow guide wing plate on the downstream flow guide block rotates under the action of pressure difference on both sides of the flow guide wing plate.

[0029] The resistance reduction and flow guide device for bridge piers, the top surface of the flow guide block is provided with a reserved lifting ring, and one end of the reserved lifting ring is connected with the rotation control mechanism.

[0030] The resistance reduction and flow guide device for bridge piers, the controller is installed on the top of the bridge pier.

[0031] The resistance reduction and flow guide device for bridge piers, the controller is installed on the top of the bridge pier. Figure 3The water flow of certain flow direction is controlled to symmetrically flow around the pier by the guide wing plate, the pressure difference on both sides of the pier is reduced, the flow resistance is reduced, and the safety of the pier is ensured.

[0032] The upper part of the guide block connected with the guide wing plate is connected with the rotating control mechanism, the arc-shaped rolling sleeve is connected with the guide block on the upper and lower parts of the side surface of the guide block, and the rolling wheel in the arc-shaped rolling sleeve is attached to the pier, and the rolling wheel rotates horizontally when the guide wing plate rotates.

[0033] The guide device is provided with a group of upstream and downstream of the pier, and the upstream is controlled to rotate and the downstream is freely rotated.

[0034] The use method of the utility model comprises the following steps:

[0035] S1. The guide block is installed on the upstream and downstream of the pier, and the guide wing plate is installed at the end of the guide block; the pressure sensor is installed on the guide wing plate of the upstream pier, and the wireless transmitter is embedded in the guide wing plate; the pressure sensor is electrically connected with the wireless transmitter; the pressure sensor is prevented; the controller and the driving device are installed on the pier; the controller is connected with the driving device and the pressure sensor; the driving device controls the movement of the guide block on the side surface of the pier through the rotating control mechanism; the guide block of the downstream pier is connected with the pier through the flexible rope;

[0036] S2. When the upstream water flow impacts the guide wing plate installed on the upstream of the pier, the pressure sensors on both sides of the guide wing plate send the pressure signals to the pressure receiving processor and the controller; the controller receives the pressure signals and compares the pressure difference; the controller receives the pressure difference and compares it with the reserved pressure threshold value; when the pressure difference is greater than the threshold value, the rotating control mechanism is controlled to drive the guide block to rotate to the side with greater pressure;

[0037] S3. When rotating, the pressure difference on both sides of the wing plate decreases; when the pressure difference is less than the threshold value, the controller controls the rotating control mechanism to stop rotating, the rotating control mechanism stops working, and the current position is maintained;

[0038] S4. The guide wing plate on the downstream of the pier freely swings under the action of the water flow, the trailing vortex is reduced, and the resistance of the pier is reduced

[0039] The principle of the utility model:

[0040] When the oblique water flow flows through the rectangular pier, due to the blocking effect of the pier on the water flow, a pressure difference is formed on both sides of the pier, which is not conducive to the stability of the pier; and the Karman vortex street phenomenon occurs downstream of the pier, which reduces the flood discharge capacity of the river channel and also causes the vibration of the pier.

[0041] The utility model discloses a kind of resistance reduction and shock reduction pier controllable rotating flow guiding devices, including the upstream controllable rotating flow guide plate of pier and the downstream free rotating tail wing flow guide plate of flow guiding unit. From upstream to downstream, flow guiding unit is arranged on the upstream and downstream of pier in turn, the flow guiding unit includes upstream flow guide wing plate, flow guide block, pressure sensor, arc rolling sleeve, rotation control mechanism, wireless transmitter, pressure receiving processor and controller, and controller is installed on pier. The arc rolling sleeve is installed on upstream arc top of pier, and arc rolling sleeve is integrated with flow guide block side surface as two groups, and flow guide wing plate is installed in flow guide block front end, pressure sensor is symmetrically installed on both sides of flow guide wing plate, and the pressure signal of pressure sensor is transmitted to pressure receiving processor by wireless transmitter, and pressure signal processing result instruction is transmitted to controller, and controller controls rotation control mechanism according to initial setting operation instruction, controls flow guiding device rotation, and makes flow guide wing plate directly opposite incoming flow direction, as shown in Figure 3 .

[0042] Downstream flow guiding device includes flow guide wing plate, suspension rotating mechanism (can be flexible rope, can be other connecting piece, and connecting piece two ends are respectively hinged flow guide block and pier top), arc rolling sleeve is installed on flow guide block, and roller in arc rolling sleeve is close to downstream pier. Flow guide wing plate downstream is passively turned to the side of low pressure under the action of water pressure on both sides, and the wake vortex around flow is reduced.

[0043] As a preferred technical scheme of the utility model, the flow guiding body includes arc rolling sleeve and flow guide block connection, and flow guide wing plate is inserted into flow guide block reserved clamping groove.

[0044] As a preferred technical scheme of the utility model, the flow guide block is made of light material with strength, such as resin material with slightly higher specific gravity than water, and the top of flow guide block is reserved with lifting ring, which is connected with rotation control mechanism.

[0045] As a preferred technical scheme of the utility model, the top of flow guide block is connected with rotation control mechanism, and rotation control mechanism is a connecting rod, one end of connecting rod is hung flow guide block, and the other end is connected with rotation hinge, and rotation hinge is hinged with telescopic end of hydraulic telescopic rod or electric telescopic rod, and the telescopic length can be controlled by hydraulic pressure or voltage, and flow guiding body is close to pier by rotating with rotation mechanism.

[0046] As a preferred technical scheme of the utility model, the main controller receives the pressure difference on both sides of flow guide wing plate, compares with reserved pressure threshold value, and sends rotation command to rotation control mechanism to rotate to the side of high pressure after pressure difference is greater than threshold value.

[0047] As a preferred technical scheme of the utility model, when the controller receives a pressure difference greater than a set value, a power supply is started to make the rotating control mechanism work, when the flow guide wing plate rotates, the pressure difference on both sides of the flow guide wing plate decreases, when the pressure difference is less than the set value, the controller sends a stop rotating command, and the electric telescopic rod or the hydraulic telescopic rod stops working to keep the current position.

[0048] The downstream flow guide unit of the pier is not provided with a control rotating unit and is free to swing under the action of water flow, so that the wake vortex and the resistance of the pier are reduced.

[0049] The rotating control mechanism and the controller of the utility model can control the rotation of the flow guide block in real time, make the flow guide wing plate uniformly distribute flow, and reduce the water flow pressure difference on both sides of the pier. Compared with the prior art (the flow guide block fixed on the pier), the advantages of the utility model are that the front end flow guide changes the direction at any time, the tail part is provided with the flow guide unit capable of changing the direction of the wing plate by moving with the water flow, the wake vortex is reduced, and the flow resistance of the pier is reduced.

[0050] The above is only a preferred embodiment of the utility model, and it should be pointed out that, for those skilled in the art, without departing from the overall concept of the utility model, a number of changes and improvements can be made, and these should also be regarded as the protection range of the utility model.

Claims

1. A drag-reducing flow guide for a bridge pier, comprising a flow guide plate, characterised in that: The guide plate comprises a guide wing plate and a guide block, the guide wing plate is arranged upstream and downstream of the pier by the guide block, one end of the guide block is connected to a rotating control mechanism, and the other end of the rotating control mechanism is installed on the top of the pier.

2. A drag-reducing flow guide for a bridge pier according to claim 1, characterised in that: The guide wing plate is detachably connected to the guide block, an arc-shaped rolling sleeve adapted to the pier is installed on the guide block, and the arc-shaped rolling sleeve is provided with at least two rollers at two ends.

3. A drag-reducing flow guide for a bridge pier according to claim 2, characterised in that: The guide wing plate is inserted, clamped or bolted to the guide block.

4. A drag-reducing flow guide for a bridge pier according to claim 3, characterised in that: The rotating control mechanism upstream of the pier comprises a suspension rotating mechanism, one end of the suspension rotating mechanism is hinged to the top end of the guide block, the other end of the suspension rotating mechanism is hinged to a driving device, the driving device is installed on the top of the pier, and the driving device is connected to the controller.

5. A drag-reducing flow guide for a bridge pier according to claim 4, characterised in that: The driving device and the suspension rotating mechanism are electric telescopic rods or hydraulic telescopic rods, at least two electric telescopic rods or hydraulic telescopic rods are arranged on different positions on the top surface of the guide block, the telescopic rod of the electric telescopic rod or the hydraulic telescopic rod is the suspension rotating mechanism, and the electric system or the hydraulic system of the electric telescopic rod or the hydraulic telescopic rod is the driving device.

6. A drag-reducing flow guide for a bridge pier according to claim 3, characterized in that: The rotating control mechanism downstream of the pier is a flexible cable, one end of the flexible cable is fixed to the top of the pier, and the other end of the flexible cable 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 of the rotating rod is hinged to the pier, and the guide wing plate on the downstream guide block rotates under the action of pressure difference on both sides of the guide wing plate.

7. The drag-reducing flow guide for a bridge pier according to claim 1, characterized by: The top surface of the guide block is provided with a reserved lifting ring, and the reserved lifting ring is connected to one end of the rotating control mechanism.

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