CN109322275A - A kind of bridge pier damping device based on venturi bubble generator - Google Patents
A kind of bridge pier damping device based on venturi bubble generator Download PDFInfo
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- CN109322275A CN109322275A CN201811509435.3A CN201811509435A CN109322275A CN 109322275 A CN109322275 A CN 109322275A CN 201811509435 A CN201811509435 A CN 201811509435A CN 109322275 A CN109322275 A CN 109322275A
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- bubble generator
- venturi
- bridge pier
- venturi bubble
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of bridge pier damping devices based on venturi bubble generator, including venturi bubble generator group, bracket, venturi bubble generator and the air introduction connecting with venturi bubble generator.It is characterized by: in the riverbed of frame bottom implantation river bed, bracket can stablize support venturi bubble generator group, venturi bubble generator group is placed in water by bracket support, and it is evenly arranged in the upstream water flow of bridge pier, venturi bubble generator can use water impact and generate bubble population, bridge pier is set to be generated the mixed layer of one layer of microbubble and water by the contact surface of water impact, the mixed layer of this layer of microbubble and water can reduce water flow and pass through the flow resistance of bridge pier, slow down water flow to the percussion of bridge pier, extends the service life of bridge.
Description
The present invention relates to a kind of bridge pier damping devices, and in particular to a kind of bridge pier drag reduction based on venturi bubble generator
Device.
Background technique
With the continuous development of human civilization, scientific and technical is constantly progressive in the 21st century, in order to meet people to out
Great demand in terms of capable and communications and transportation, more and more cross a river bridges and river-spanning bridge are built up in succession, but water flow is to bridge
The erosion of body especially bridge pier is than more serious, and common bridge does not protect bridge pier generally, without any protective device, because
This, water flow brings high risks to the safety of pontic and service life to the impact and erosion of bridge pier.
Summary of the invention
As described above in order to solve the problems, such as, the purpose of the present invention is to provide a kind of completely new to be occurred based on venturi bubble
The bridge pier damping device of device, the device generate the mixing of one layer of microbubble and water on bridge pier surface by venturi bubble generator
Layer reduces the flow resistance of water to reduce erosion of the water flow to bridge pier to the full extent, as much as possible the extension pontic longevity
Life, at the same time, the present apparatus does not need other external energies such as electric energy, can work merely with water flow dynamic energy, high-efficiency environment friendly.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of bridge pier damping device based on venturi bubble generator, including venturi bubble generator group 1, bracket 2,
Venturi bubble generator 3, it is characterised in that: 2 bottom of bracket is implanted into the riverbed of river bed, supports bracket 2 steadily
Venturi bubble generator group 1, venturi bubble generator group 1 are placed in water by the support of bracket 2, venturi bubble generator
Equably down current arrangement is in water flow direction of flow for group 1, i.e., with the upstream of the water of bridge pier positioning.
Optimized calculating obtains the optimal size of venturi bubble generator 3 are as follows: and venturi bubble generator 3 is 40cm long,
Entrance outer diameter 11cm, inlet inside diameter 10cm export outer diameter 12cm, exit inside diameter 11cm, throat outer diameter 12cm, throat internal diameter 5cm,
Air inlet outer diameter 2.5cm, air inlet internal diameter 2cm, wherein throat length 6cm, tapered segment length 4cm, flaring segment length 5cm enter
The length of mouth section is 12cm, and the stabilization segment length of divergent segment is 13cm, and the stabilization segment length of converging transition is 12cm；Each literary mound
In the height of the connected air introduction 4 of bubble generator 3 be above par position 50cm.
Venturi bubble generator 3 in every group of venturi bubble generator group 1 is placed in parallel in the horizontal direction, and adjacent two
The spacing of a venturi bubble generator 3 is 20cm, and every group of venturi bubble generator group 1 is vertically put along bridge pier support direction
It sets, i.e., direction is placed along the horizontal plane, and two adjacent groups venturi bubble generator group 1 is parallel and vertical direction spacing is 30cm.
The number of venturi bubble generator 3 in every group of venturi bubble generator group 1 is related with bridge pier hydraulic radius, works as bridge
When pier hydraulic radius is less than or equal to 8cm, a venturi bubble generator is only needed in every group of venturi bubble generator group 1
3, it is venturi in every group of venturi bubble generator group 1 that the numerical value of bridge pier hydraulic radius, which is rounded resulting numerical value divided by 8 quotient,
The quantity of bubble generator 3.
In the horizontal direction, venturi bubble generator 3 outlet away from bridge pier 10cm, at away from bridge pier bottom 30cm on the basis of
Line, and since this reference line, a venturi bubble generator group 1 is arranged per 30cm is vertically risen, and is arranged always
When being less than 30cm to anomaly water level, venturi bubble generator group 1 is no longer arranged.
The structure of each venturi bubble generator 3 is identical in venturi bubble generator group 1, and all literary mounds
In 3 relative position of bubble generator be parallel arrangement, the air introduction (4) of venturi bubble generator 3 not necessarily strictly wants
It asks as straight tube, the shape of air inlet duct can also be adjusted according to River Hydrology situation, it such as can be by air inlet duct along bridge pier
Arrangement, to reduce impact of the water flow to air introduction (4), as long as the air inlet of air introduction (4) is made to be higher than par position
50cm enters the air inlet of air introduction (4) to prevent water flow.In order to indicate clear, Fig. 1 and venturi shown in Fig. 2
The air introduction (4) of bubble generator group 1 is straight tube, is special circumstances.
Venturi bubble generator group 1 is worked using the kinetic energy that water flow provides, and brings air into venturi bubble generator 3
It is interior, bubble is generated in exit, and form the mixed layer of one layer of microbubble and water on bridge pier surface, to reach protection bridge pier and prolong
The purpose in long pontic service life.
The invention has the following advantages that
The present invention provides a kind of bridge pier damping device based on venturi bubble generator, the device is by by venturi
The bubble that bubble generator generates is covered on bridge pier and is hit face, and then reduces bridge pier stress, extends the bridge pier service life, greatly increases
The safety of bridge.At the same time, due to still lacking mature technology for the protection problem of bridge pier at present, this dress
It is equipped with biggish application value.
Detailed description of the invention
Fig. 1 is a kind of bridge pier damping device based on venturi bubble generator of the present invention, and every group of venturi bubble occurs
Overall structure diagram of the device group 1 there are three venturi bubble generator 3 and when having three groups of venturi bubble generator groups 1
Fig. 2 is a kind of bridge pier damping device based on venturi bubble generator of the present invention when every group of venturi bubble occurs
There are three relative position top views when venturi bubble generator 3 for device group 1
Fig. 3 is venturi bubble generator 3 in a kind of bridge pier damping device based on venturi bubble generator of the present invention
Cross-sectional view
Fig. 4 is venturi bubble generator 3 in a kind of bridge pier damping device based on venturi bubble generator of the present invention
Air introduction (4) structure chart
Fig. 5 is venturi bubble generator 3 in a kind of bridge pier damping device based on venturi bubble generator of the present invention
With the structure chart of flaring stable section and the connecting portion of tapered stable section
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, venturi bubble generator group 1, bracket 2, venturi bubble generator 3 and with venturi bubble send out
The air introduction 4 that raw device 3 connects constitutes the bridge pier damping device based on venturi bubble generator, the implantation of 2 bottom of bracket
In the riverbed of river bed, bracket 2 is set to stablize support venturi bubble generator group 1, venturi bubble generator group 1 is by bracket
2 support be placed in water, venturi bubble generator group 1 equably down current arrangement in water flow direction of flow.
Optimized calculating obtains the optimal size of venturi bubble generator 3 are as follows:
Venturi bubble generator 3 is 40cm long, entrance outer diameter 11cm, inlet inside diameter 10cm, outlet outer diameter 12cm, in outlet
Diameter 11cm, throat outer diameter 12cm, throat internal diameter 5cm, air inlet outer diameter 2.5cm, air inlet internal diameter 2cm, wherein throat length
6cm, tapered segment length 4cm, flaring segment length 5cm, the length of entrance are 12cm, and the stabilization segment length of divergent segment is 13cm,
The stabilization segment length of converging transition is 12cm；The height of the connected air introduction 4 of each venturi bubble generator 3 is above
Par position 50cm.
The structure of each venturi bubble generator 3 is identical in venturi bubble generator group 1, and all literary mounds
In 3 relative position of bubble generator be parallel arrangement, the air introduction 4 of venturi bubble generator 3 is not necessarily strict with
For straight tube, the shape of air inlet duct can also be adjusted according to River Hydrology situation, as long as keeping the air inlet of air introduction 4 high
In par position 50cm, in order to make diagram relatively sharp succinct, the sky of Fig. 1 and venturi bubble generator group 1 shown in Fig. 2
It is straight tube that gas, which introduces pipe 4, is special circumstances.
Additional stress can be brought to bridge pier since venturi bubble generator 3 is arranged on bridge pier, to a certain extent plus
Bridge pier burden has been weighed, adverse effect can be brought to bridge pier, so design supports venturi bubble generator 3 with bracket, bracket 2
Bottom is implanted into river riverbed, and bracket 2 is allow to stablize support venturi bubble generator 3.
Venturi bubble generator 3 in every group of venturi bubble generator group 1 is placed in parallel in the horizontal direction, and adjacent two
The spacing of a venturi bubble generator 3 is 20cm, and every group of venturi bubble generator group 1 is disposed vertically along bridge pier support direction
(i.e. horizontal direction placement), two adjacent groups venturi bubble generator group 1 is parallel and vertical direction spacing is 30cm.
The number of venturi bubble generator 3 in every group of venturi bubble generator group 1 is related with bridge pier hydraulic radius, works as bridge
When pier hydraulic radius is less than or equal to 8cm, a venturi bubble generator is only needed in every group of venturi bubble generator group 1
3, it is venturi in every group of venturi bubble generator group 1 that the numerical value of bridge pier hydraulic radius, which is rounded resulting numerical value divided by 8 quotient,
The quantity of bubble generator 3.
The outlet of venturi bubble generator 3 away from bridge pier 10cm, with the 30cm away from the riverbed of bridge pier bottom at for benchmark line, and from
This reference line starts, and every rising 30cm arranges a venturi bubble generator group 1, until being less than at 30cm not apart from par position
In arrangement venturi bubble generator group 1, the group number of venturi bubble generator group 1 can be adjusted according to depth of water dynamic.
Since par position is the lowest water level in river 1 year, it is generally present in dry season, therefore, venturi bubble is sent out
Raw device group 1 is arranged in par position hereinafter, ensuring that all venturi bubble generators 3 work at the same time, and avoids the idleness of equipment, saves
About cost.
As shown in figure 3, the venturi bubble generator 3 using cocurrent air inlet generates bubble, due to the venturi gas of setting
It steeps the outlet of generator 3 and there was only 10cm with bridge pier distance, bubbles all enough all arrive at bridge after leaving venturi bubble generator 3
Pier surface, and with the accumulation of bubble, the mixed layer of one layer of microbubble and water is formed on bridge pier surface.
When water impact bridge pier, is flowed by water flow and kinetic energy is provided, outside energy is not needed, when water flow flows through venturi gas
After steeping generator group 1, a large amount of fine and closely woven bubbles is generated, and be attached to bridge pier surface, forms the mixed layer of one layer of microbubble and water,
Bridge pier drag reduction is given to reach, reduces bridge pier corrosion, extends the effect in pontic service life.
Be above the present invention it is a kind of for bridge pier in water one of the venturi bubble generator of drag reduction it is complete
Duty cycle.
Specific embodiment: if a diameter is the cylindrical type bridge pier of 96cm, in the river that the depth of water is 270cm, through counting
It calculates it is found that bridge pier hydraulic radius is 96*0.25=24cm, 24 ÷ 8=3 are a, and because of 270 ÷ 30=9 groups, according to more than
Specific embodiment from top to bottom needs cloth it is found that every group of venturi bubble generator group 1 has 3 venturi bubble generators 3 altogether
9 groups of venturi bubble generator groups 1 are set, topmost just peaceful water level is in same flat to one group of venturi bubble generator group 1
Face.
For another example, the cylindrical type bridge pier that a diameter is 92cm, in the river that the depth of water is 215cm, the calculation shows that, bridge
Pier hydraulic radius is 92*0.25=23cm, 23 ÷ 8=2 and remaining 7cm, 7cm < 8cm, and being rounded is 2, and because 215 ÷ 30=7
Group remaining 5cm, 5cm < 30cm, therefore according to the above specific embodiment it is found that every group of venturi bubble generator group 1 has 2 texts
Bubble generator 3 in mound need to from top to bottom arrange 7 groups of venturi bubble generator groups 1 altogether, at this point, one group of the top venturi
Bubble generator group 1 is in par position or less 5cm.
For another example, the cylindrical type bridge pier that a diameter is 92cm, in the river of depth of water 239cm, the calculation shows that, bridge pier
Hydraulic radius is 92*0.25=23cm, and 23 ÷ 8=2 remaining 7cm, 7cm < 8cm, being rounded is 2, and because 239 ÷ 30=7 groups
Remaining 29cm, 29cm < 30cm, therefore according to the above specific embodiment it is found that every group of venturi bubble generator group 1 has 2 texts
Bubble generator 3 in mound need to from top to bottom arrange 7 groups of venturi bubble generator groups 1 altogether, at this point, one group of the top venturi
Bubble generator group 1 is also at par position or less 29cm.
This bridge pier damping device based on venturi bubble generator can effectively reduce water impact pair suffered by bridge pier
The corrosion of bridge pier bring simultaneously as the device does not need additional energy input, therefore also has energy-saving and emission-reduction important
Meaning.In addition, it is seldom for the method and apparatus of bridge pier protection at present, so, this device has quite in bridge pier protection field
Wide development and application prospect.
Claims (7)
1. a kind of bridge pier damping device based on venturi bubble generator, including venturi bubble generator group (1), bracket
(2), venturi bubble generator (3) and the air introduction (4) being connect with venturi bubble generator (3), it is characterised in that:
Bracket (2) bottom is implanted into the riverbed of river bed, and bracket (2) can steadily support venturi bubble generator group (1), venturi
Bubble generator group (1) is placed in water by bracket (2) support, and equably down current arrangement exists venturi bubble generator group (1)
The water flow direction of flow of bridge pier upstream.
2. as described in claim 1 based on the bridge pier damping device of venturi bubble generator, it is characterised in that: venturi gas
Generator (3) long 40cm, entrance outer diameter 11cm, inlet inside diameter 10cm are steeped, outer diameter 12cm, exit inside diameter 11cm are exported, outside throat
Diameter 12cm, throat internal diameter 5cm, air inlet outer diameter 2.5cm, air inlet internal diameter 2cm；Wherein, throat length 6cm, tapered segment length
4cm, flaring segment length 5cm, the length of entrance are 12cm, and the stabilization segment length of divergent segment is 13cm, the stable section of converging transition
Length is 12cm；Each venturi bubble generator (3) is separately connected air introduction (4), all air introductions (4)
Height is higher than par position 50cm.
3. as described in claim 1 based on the bridge pier damping device of venturi bubble generator, it is characterised in that: every group of text mound
In venturi bubble generator (3) in bubble generator group (1) be placed in parallel in the horizontal direction, two neighboring venturi bubble
The spacing of generator (3) is 20cm, and every group of venturi bubble generator group (1) is disposed vertically along bridge pier support direction, adjacent two
Group venturi bubble generator group (1) is parallel and spacing is 30cm.
4. as claimed in claim 3 based on the bridge pier damping device of venturi bubble generator, it is characterised in that: every group of text mound
In venturi bubble generator (3) in bubble generator group (1) quantity it is related with bridge pier hydraulic radius, when bridge pier waterpower half
When diameter is less than or equal to 8cm, a venturi bubble generator (3), bridge are only needed in every group of venturi bubble generator group (1)
It is venturi gas in every group of venturi bubble generator group (1) that the numerical value of pier hydraulic radius, which is rounded resulting numerical value divided by 8 quotient,
Steep the quantity of generator (3).
5. as described in claim 1 based on the bridge pier damping device of venturi bubble generator, it is characterised in that: venturi gas
Steep generator (3) outlet in the horizontal direction away from bridge pier 10cm, with apart from the riverbed 30cm of bridge pier bottom at for benchmark line, and from this base
Directrix starts, and arranges a venturi bubble generator group (1) along the every rising 30cm of water surface vertical direction, is arranged into anomaly always
When water level is less than 30cm, no longer arrange.
6. the bridge pier damping device described in claim 1 based on venturi bubble generator, it is characterised in that: venturi bubble
The structure of each venturi bubble generator (3) is identical in generator group (1), and all venturi bubble generators
(3) relative position is parallel arrangement, and it is straight tube that the air introduction (4) of venturi bubble generator (3), which is not necessarily strict with,
Air inlet duct (4) can also be arranged along bridge pier, to reduce impact of the water flow to air introduction (4), but be to ensure that sky
The air inlet that gas introduces pipe (4) is higher than par position 50cm, and the air inlet of air introduction (4) is entered to prevent water flow.
7. as described in claim 1 based on the bridge pier damping device of venturi bubble generator, it is characterised in that: venturi gas
It steeps generator group (1) to work using the kinetic energy that water flow provides, brings air into venturi bubble by air introduction (4) and occur
In device (3), bubble is generated in its exit, and form the mixed layer of one layer of microbubble and water on bridge pier surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509435.3A CN109322275A (en) | 2018-12-11 | 2018-12-11 | A kind of bridge pier damping device based on venturi bubble generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509435.3A CN109322275A (en) | 2018-12-11 | 2018-12-11 | A kind of bridge pier damping device based on venturi bubble generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322275A true CN109322275A (en) | 2019-02-12 |
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ID=65256134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811509435.3A Pending CN109322275A (en) | 2018-12-11 | 2018-12-11 | A kind of bridge pier damping device based on venturi bubble generator |
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| CN (1) | CN109322275A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110758633A (en) * | 2019-10-30 | 2020-02-07 | 西安交通大学 | Venturi system for reducing resistance of hull bubbles |
| CN114592421A (en) * | 2022-03-10 | 2022-06-07 | 合肥工业大学 | Local protection method and device for river channel bridge foundation |
-
2018
- 2018-12-11 CN CN201811509435.3A patent/CN109322275A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110758633A (en) * | 2019-10-30 | 2020-02-07 | 西安交通大学 | Venturi system for reducing resistance of hull bubbles |
| CN114592421A (en) * | 2022-03-10 | 2022-06-07 | 合肥工业大学 | Local protection method and device for river channel bridge foundation |
| CN114592421B (en) * | 2022-03-10 | 2023-09-26 | 合肥工业大学 | River bridge foundation local protection method and device |
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