CN109338872B

CN109338872B - Bridge stabilizing device controlled by water flow

Info

Publication number: CN109338872B
Application number: CN201811161766.2A
Authority: CN
Inventors: 王能
Original assignee: Individual
Current assignee: Wang Sha
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-28
Anticipated expiration: 2038-09-30
Also published as: CN109338872A

Abstract

The invention relates to a bridge stabilizing device controlled by water flow, which comprises a bridge pier, a bridge body, at least one balancing weight arranged below the bridge body and turntables in one-to-one correspondence with the balancing weight, wherein the turntables are arranged above the balancing weight and are rotationally connected with the balancing weight through vertical axes; the upper end of the pull rod is rotationally connected with the beam body, a rotatable turbine paddle is arranged on the bridge pier, and the turbine paddle is in transmission connection with the rotary table; the invention controls the rotation of the turbine paddle through the height change of the water level and the speed change of the fluid, thereby realizing the tensioning of the pull rod and increasing the weight of the balancing weight or the riverbed onto the beam body to realize the weight increment.

Description

Bridge stabilizing device controlled by water flow

Technical Field

The invention relates to the field of bridge construction, in particular to a bridge stabilizing device controlled by water flow.

Background

The stability of the bridge is guaranteed by the safety of the bridge, the stability of the bridge cannot have great potential safety hazard in normal use, but when similar accidents such as sudden rising of water level, rapid water flow and the like caused by strong wind or heavy rain occur, the impact force on the bridge is most likely to exceed the design strength, so that the bridge is in danger of collapse, the vehicle passing is influenced, great economic loss is brought, and even casualties are caused; especially, the safety of the bridge is threatened by geological disasters such as strong wind and rainfall areas or coastal areas, mountain floods, debris flows and the like and river water level rises.

When the situation occurs, not only can the pier part be impacted, but also the beam body can be scoured when the water level is high, so that the bridge body can be deviated or broken, and particularly, the influence on some light bridges such as steel structure bridges, floating bridges and the like is particularly obvious; in order to maintain good stability of the bridge when the above situations occur, related personnel often adopt a heavy-load bridge pressing mode to emergently deal with the overall stability of the bridge, for example, a plurality of full-load trucks or train carriages are driven onto the bridge, or sandbags are piled on the bridge, and the method for increasing the weight can increase the extrusion force between the bridge body and the bridge pier as well as between the bridge pier and the ground, so that on one hand, the friction force between the bridge body and the bridge pier is increased, and simultaneously, the inertia potential energy of the bridge per se is rapidly increased, so that the bridge can be kept stable better when being impacted, and the displacement of the local or the overall is avoided.

Although the method cannot fundamentally solve the safety problem of the bridge, the method is a simple and rapid guarantee method for dealing with emergency; the method has the following defects: firstly, auxiliary operation needs to be carried out by means of equipment and personnel, and secondly, a long time is consumed to complete the implementation process, so that a great potential safety hazard exists for field personnel, and once an accident occurs in the implementation process, more unnecessary property loss and casualties can be caused; therefore, the method should be fused with the bridge to obtain safer and faster emergency use effect.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the invention provides a bridge stabilizing device controlled by water flow, which aims to solve the problems that the existing bridge has insufficient resistance to impact force and cannot safely and timely deal with emergency.

The technical scheme for solving the problem is as follows: the rotary table is arranged above the balancing weight and is rotationally connected with the balancing weight through a vertical axis, the rotary table does not slide along the axis, the rotary table is provided with a pull rod which is arranged above the rotary table and vertically slides along the rotating axis of the rotary table, relative rotation is not generated between the pull rod and the rotary table, the rotary table is provided with a plurality of sliding blocks which are distributed along the circumference of the axis of the rotary table and radially slide, the sliding blocks are arranged below the pull rod and are hinged with the pull rod through a connecting rod, and when the rotary table drives the pull rod to rotate, the sliding blocks are subjected to centrifugal force to centrifugally slide on the rotary table and pull the pull rod to downwards slide through the connecting rod; the upper end of the pull rod is rotationally connected with the beam body through the axis of the rotary table, the pier is provided with a rotatable turbine paddle which is arranged in the cylindrical culvert and is coaxially arranged with the cylindrical culvert, the turbine paddle is in transmission connection with the rotary table, and when the turbine paddle rotates, the rotary table drives the pull rod to rotate along with the turbine paddle.

The invention has simple operation, controls the rotation of the turbine paddle through the height change of the water level and the speed change of the fluid, further realizes the tension of the pull rod, increases the weight of the balancing weight or the riverbed onto the beam body to realize the weight increment, can finish the automatic stable operation without manual intervention, not only ensures the stability of the bridge, but also avoids the safety risk existing in the field operation; meanwhile, other materials, equipment and energy sources are not required to be input, and a large amount of cost is saved.

Drawings

Fig. 1 is a front view of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line A-A of the present invention.

Fig. 3 is an enlarged view of portion B of fig. 1 according to the present invention.

FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 3 according to the present invention.

Fig. 5 is a schematic perspective view of the present invention.

Fig. 6 is an enlarged view of portion D of fig. 5 according to the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, the present invention comprises a pier 1 with a cylindrical culvert, a girder 2 installed on the pier 1, at least one weight block 3 disposed under the girder 2, and turntables 4 corresponding to the weight blocks 3 one by one, the rotary table 4 is arranged above the balancing weight 3 and is rotationally connected with the balancing weight 3 through a vertical axis without axial sliding, the rotary table 4 is provided with a pull rod 5 which is arranged above the rotary table 4 and slides vertically along the rotating axis of the rotary table 4, the pull rod 5 and the rotary table 4 do not rotate relatively, the rotary table 4 is provided with a plurality of slide blocks 6 which are distributed along the circumference of the axis of the rotary table 4 and slide radially, the slide blocks 6 are arranged below the pull rod 5 and are hinged with the pull rod 5 through a connecting rod 7, when the rotary table 4 drives the pull rod 5 to rotate, the slide block 6 is subjected to centrifugal force to centrifugally slide on the rotary table 4 and pulls the pull rod 5 to downwards slide through the connecting rod 7; the upper end of the pull rod 5 is rotationally connected with the beam body 2 through the axis of the rotary table 4, the pier 1 is provided with a rotatable turbine propeller 8 which is arranged in the cylindrical culvert and is coaxial with the cylindrical culvert, the turbine propeller 8 is in transmission connection with the rotary table 4, and when the turbine propeller 8 rotates, the rotary table 4 drives the pull rod 5 to rotate along with the turbine propeller.

Preferably, the turbine blade 8 is rotatably connected to the pier 1 through a first bearing 9, the turbine blade 8 is provided with a first bevel gear 10 coaxially arranged with the turbine blade 8, the turntable 4 is provided with a second bevel gear 11 coaxially arranged with a rotation axis of the turntable 4, the second bevel gear 11 is meshed with the first bevel gear 10, and when the turbine blade 8 rotates, the turntable 4 rotates under the transmission action of the first bevel gear 10 and the second bevel gear 11.

Preferably, the second bevel gear 11 is connected to the turntable 4 via an overrunning clutch 12, and when the rotation speed of the second bevel gear 11 is lower than that of the turntable 4, the overrunning clutch 12 does not generate power transmission, and the turntable 4 can continuously rotate under the action of self inertia.

Preferably, the rotating disc 4 is rotatably connected with the counterweight 3 through a second bearing 13.

Preferably, the beam body 2 is provided with a connecting block 14 arranged below the beam body 2, and the upper end of the pull rod 5 is rotatably connected with the connecting block 13 through a third bearing 15.

Preferably, the rotating disc 4 is provided with a sleeve 16 which is arranged above the rotating disc 4 and is coaxial with the rotating axis of the rotating disc 4, and the pull rod 5 is coaxially connected with the sleeve 16 in a sliding way and does not rotate relative to the sleeve.

Preferably, the rotary disc 4 is provided with a return spring 17 arranged below the pull rod 5, and the pull rod 5 slides upwards under the elastic force of the return spring 17.

Preferably, the beam body 2 is provided with a connecting block 14 arranged below the beam body 2, the upper end of the pull rod 5 is provided with a flange 18, the connecting block 14 is provided with an accommodating sliding groove 19 matched with the flange 18 and arranged along the axial direction of the pull rod 5, the flange 18 is arranged in the accommodating sliding groove 19, a supporting spring 20 arranged below the flange 18 is arranged in the accommodating sliding groove 19, two ends of the supporting spring 20 are respectively contacted with the flange 18 and the lower end surface of the accommodating sliding groove 19, when the pull rod 5 is pulled by the connecting rod 7 to slide downwards, the supporting spring 20 is compressed and the compressed elastic force acts on the beam body 2 through the connecting block 14, and after the pull rod 5 stops sliding at the current position, the elastic force of the supporting spring 20 is equal to the downward pulling force of the pull rod 5, so that the pulling force of the pull rod 5 on the beam body 2 can be set through the selection and setting of the supporting spring.

Preferably, the accommodating chute 19 is internally provided with a third bearing 15 which is arranged between the support spring 20 and the lower end surface of the accommodating chute 19 or between the flange 18 and the support spring 20, so that the support spring 20 is prevented from generating large resistance to the rotation of the pull rod 5.

Preferably, the turntable 4 is provided with a limiting sliding groove 21 arranged along the radial direction of the rotation axis of the turntable 4, the slide block 6 is provided with a sliding connection part 22 arranged in the limiting sliding groove 21 in a sliding manner, when the centrifugal force applied to the slide block 6 is large, the slide block 6 is blocked by the limiting sliding groove 21 to stop the centrifugal sliding, and the beam body 2 is prevented from being damaged due to the overlarge pulling force applied to the pull rod 5.

Preferably, the second bearing 13 and the third bearing 15 are thrust bearings.

The bridge pier is not different from a common bridge in normal use, the bridge pier 1 is used for supporting the beam body 2, and the beam body 2 is used for passing vehicles and pedestrians; can install above-mentioned each drive disk assembly on box 23 during the installation, then select suitable mounting means according to actual demand to install box 23 on pier 1, if: 1) preassembling the box body 23 on a reinforcing steel bar frame of the pier 1, and then pouring concrete; 2) adopting a steel structure and concrete mixed pier, and directly installing the box body 23 or the components on the steel structure part; 3) adopting a thin-wall hollow pier, and directly pre-installing the box body 23 or the components in the hollow pier; 4) in order to facilitate later maintenance, the box body 23 can be suspended and fixed on the outer side of the pier 1; no matter what installation mode is selected, only the water flow can flow through the turbine paddle 8; arranging a reasonable number of piers 1 according to the width of a river channel and actual use requirements, fixing a beam body 2 on the piers 1, selecting a counterweight block 3 with proper weight according to the actual use requirements, and ensuring that the counterweight block 3 is stably arranged on a river bed and cannot generate horizontal displacement due to water flow scouring; in order to make the counterweight 3 work reliably, it can be placed on the river bed stably by a plurality of implementation methods including but not limited to the following: a) the counterweight block 3 is vertically connected with the pier 1 in a sliding way; b) arranging a sunk well matched with the balancing weight 3 at the bottom of the river bed, and placing the balancing weight 3 at the bottom of the sunk well to enable the balancing weight to slide up and down in the sunk well; c) the balancing weight 3 is fixedly connected on the riverbed or is buried in the underground depth of the riverbed.

When the river water level is low, the water flow does not contact with the turbine blade 8 or does not make a large area contact, and therefore, the turbine blade 8 does not rotate, and accordingly, the remaining components do not move.

When the water level of a river rises and the flow rate is accelerated, the turbine propeller 8 is impacted by water flow to rotate, the rotary disc 4 rotates under the transmission action of the gear pair and the overrunning clutch 12 and drives the pull rod 5 to rotate simultaneously, the rotation of the rotary disc 4 generates centrifugal force to enable the sliding block 6 to centrifugally slide, the sliding block 6 centrifugally slides to enable an included angle between the connecting rod 7 and the pull rod 5 to be increased, so that the pull rod 5 downwards slides on the rotary disc 4 to generate tensile force and compress the supporting spring 20, and the vertical relative position between the sliding block 6 and the rotary disc 4 is unchanged, and the vertical relative position between the rotary disc 4 and the counterweight block 3 is also unchanged, so that the beam body 2 and the rotary disc 4, namely the counterweight block 3, are tensioned by the tensile force of the pull rod 5, and the weight of the counterweight block 3 is increased; the higher the rotating speed of the turbine paddle 8 is, the higher the rotating speed of the rotating disc 4 is, the larger the centrifugal force applied to the slide block 6 is, and therefore the larger the pulling force on the pull rod 5 is; corresponding to the different implementation methods adopted for the counterweight 3, the actual weight increasing situation on the beam body 2 is different: a) the weight of the balancing weight 3 is added on the beam body 2, so that the expected weight increasing effect can be obtained by selecting the balancing weight 3 with proper weight; b) the weight of the counterweight 3 is also added on the beam body 2, and the counterweight 3 does not influence the pier 1 when not working under the condition; c) the added tension on the beam body 2 is the tension generated on the pull rod 5, which can be indirectly understood as pulling a certain weight of riverbed to the beam body 2, in which case the specific weight gain effect needs to be determined by setting the elastic coefficient of the supporting spring 20 or adopting a tension sensor.

Although the weight increasing effect generated on the beam body 2 under different conditions is different, the weight increasing operation is realized, the effect of stabilizing the bridge is achieved, and the bridge can be reasonably selected according to different use environments and geological characteristics.

However, since the centrifugal force of the slider 6 is related to the rotational angular speed of the turntable 4, after the rotational speed of the turntable 4 is continuously increased, the centrifugal force applied to the slider 6 is continuously increased, so that the centrifugal sliding distance of the slider is continuously increased, and the tensile force applied to the pull rod 5 is continuously increased, in order to prevent the tensile force applied to the pull rod 5 from being too large, the limiting chute 21 and the sliding portion 22 are adopted to limit the maximum centrifugal sliding distance of the slider 6, so that on one hand, the phenomenon that the tensile force applied to the pull rod 5 is unlimitedly increased, so that the pull rod 5 is broken, and the weight increasing process is interrupted and fails is avoided, on the other hand, the situation that the tensile force applied to the beam body 2 is within an expected reasonable range is also ensured, and the phenomenon that the weight increased.

In addition, under the condition of strong convection, even if the water level is not raised and the flow velocity is not accelerated, the turbine paddle 8 can still rotate under the pushing of wind power, so that the weight increment of the beam body 2 is realized, and the stabilizing effect is achieved.

When the emergency state is relieved, the water level of the river is lowered, the flow velocity is reduced, and the wind power is weakened, at the moment, the rotating speed of the turbine paddle 8 is gradually reduced until the turbine paddle completely stops, the centrifugal force applied to the sliding block 6 is gradually reduced and completely disappears, so that the tensile force applied to the pull rod 5 on the beam body 2 is gradually reduced until the tensile force is completely eliminated, and the bridge is recovered to be normally used.

In addition, in the weight increasing process, because the flow velocity of water flow or strong convection is not uniform, the turbine paddle 8 does not rotate at a constant speed or rotate at a uniform acceleration, in order to enable the tension of the pull rod 5 to be relatively uniform and stable, the overrunning clutch 12 is adopted to drive the rotating disc 4, when the rotating speed of the turbine paddle 8 is increased, the rotating speed of the rotating disc 4 is correspondingly increased, so that the tension of the pull rod 5 is increased, when the rotating speed of the turbine paddle 8 is reduced, the turbine paddle 8 does not generate torque transmission on the rotating disc 4, at the moment, the rotating disc 4 continues to rotate under the self inertia effect, so that the tension on the pull rod 5 is slowly reduced, and the influence of the sudden change of the tension of the pull rod 5 on the stability effect of the bridge is avoided.

The invention has smart structure and simple operation, controls the rotation of the turbine paddle through the height change of the water level and the speed change of the fluid, further realizes the tension of the pull rod, increases the weight of the balancing weight or the riverbed onto the beam body to realize the weight increase, changes the tension of the pull rod in real time along with the change of the rotating speed of the turbine paddle, automatically eliminates the tension after the emergency state is relieved, and can finish the automatic stabilization and the stabilization relieving operation without manual intervention, thereby not only effectively solving the stability problem of the bridge under the emergency condition, but also effectively replacing the existing operation mode of carrying out bridge pressing through external equipment and manpower, not only greatly ensuring the stability of the bridge, but also avoiding the safety risk existing in field operation.

Meanwhile, the counterweight block or the riverbed is used as a weight increasing object, other materials and equipment are not required to be input, a large amount of cost is saved, natural resources such as water energy and wind energy are utilized to drive the pull rod to generate pulling force in the implementation process, common energy sources such as electric power and hydraulic pressure are not required, and the weight increasing process can be prevented from being interrupted or greater safety risks are caused due to the fact that water flow or strong convection damages cables, oil ways and the like.

Claims

1. A bridge stabilizing device controlled by water flow comprises a bridge pier (1) and a beam body (2), and is characterized by further comprising at least one balancing weight (3) arranged below the beam body (2) and rotary tables (4) in one-to-one correspondence with the balancing weight (3), wherein the rotary tables (4) are arranged above the balancing weight (3) and are rotationally connected with the balancing weight (3) through a vertical axis, pull rods (5) which are arranged above the rotary tables (4) and slide along the axis of the rotary tables (4) are arranged on the rotary tables (4), a plurality of sliding blocks (6) which are circumferentially distributed and radially slide are arranged on the rotary tables (4), and the sliding blocks (6) are arranged below the pull rods (5) and are hinged with the pull rods (5) through connecting rods (7); the upper end of the pull rod (5) is rotationally connected with the beam body (2), a rotatable turbine paddle (8) is arranged on the pier (1), and the turbine paddle (8) is in transmission connection with the turntable (4).

2. A bridge stabilizing device using water flow control according to claim 1, wherein the turbine blade (8) is provided with a first helical gear (10) coaxially arranged with the turbine blade (8), the turntable (4) is provided with a second helical gear (11) coaxially arranged with the turntable (4), and the second helical gear (11) is engaged with the first helical gear (10).

3. A bridge stabiliser using water flow control as claimed in claim 2 in which the second bevel gear (11) is connected to the turntable (4) via an overrunning clutch (12).

4. A bridge stabiliser as claimed in claim 1 in which the turntable (4) is rotatably connected to the counterweight (3) via a second bearing (13).

5. A bridge stabilizing device controlled by water flow as claimed in claim 1, wherein the beam body (2) is provided with a connecting block (14) disposed below the beam body (2), and the upper end of the draw bar (5) is rotatably connected with the connecting block (13) through a third bearing (15).

6. A bridge stabiliser as claimed in claim 1 in which the turntable (4) has a sleeve (16) disposed above the turntable (4) and coaxially with the turntable (4), the tension rod (5) being slidably connected coaxially with the sleeve (16).

7. The bridge stabilizing device controlled by water flow according to claim 1, wherein the rotary plate (4) is provided with a return spring (17) disposed below the pull rod (5), and the pull rod (5) slides upwards under the elastic force of the return spring (17).

8. The bridge stabilizing device controlled by water flow according to claim 1, wherein the beam body (2) is provided with a connecting block (14) arranged below the beam body (2), the upper end of the pull rod (5) is provided with a flange (18), the connecting block (14) is provided with an axial containing chute (19) matched with the flange (18), the flange (18) is arranged in the containing chute (19), a supporting spring (20) arranged below the flange (18) is arranged in the containing chute (19), and two ends of the supporting spring (20) are respectively contacted with the lower end faces of the flange (18) and the containing chute (19).

9. A bridge stabiliser as claimed in claim 8 in which the receiving channel (19) contains a third bearing (15) located between the support spring (20) and the lower end of the receiving channel (19).

10. The bridge stabilizing device controlled by water flow according to claim 1, wherein the turntable (4) is provided with a limiting sliding groove (21) arranged along the radial direction of the rotation axis of the turntable (4), and the slide block (6) is provided with a sliding part (22) arranged in the limiting sliding groove (21) in a sliding manner.