CN103691166B - A kind of anti-floating system of water process sedimentation tank water leg - Google Patents
A kind of anti-floating system of water process sedimentation tank water leg Download PDFInfo
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- CN103691166B CN103691166B CN201210367924.6A CN201210367924A CN103691166B CN 103691166 B CN103691166 B CN 103691166B CN 201210367924 A CN201210367924 A CN 201210367924A CN 103691166 B CN103691166 B CN 103691166B
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- water leg
- water
- flap valve
- sedimentation tank
- cable wire
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Abstract
The present invention relates to the anti-floating system of a kind of water process sedimentation tank water leg, water leg is arranged on from the crossbeam that pool wall cantilevers out, it is characterized in that water leg side-wall hole, tapping arranges flap valve, being additionally provided with a suspension bracket on crossbeam, suspension bracket is provided with pulley and the cable wire matched with this pulley, one end of cable wire is connected with the lower end of flap valve, the other end of cable wire and a floating drum connect, floating drum be connected with a pedestal.The present invention controls flap valve opening and closing by the height of sedimentation tank water level, can be greatly reduced Chi Shui to water leg buoyancy, reduce the active force to water leg, reduce its structural requirement, reduce civil engineering construction cost, compared with former anti-float method, also significantly improve effluent quality.
Description
Technical field
The present invention relates to the water leg of water process primary sedimentation pond and secondary sedimentation tank, particularly the anti-floating system of a kind of water process sedimentation tank water leg.
Background technology
At present, the conventional structures with water leg of water treatment field, such as circular or rectangle primary sedimentation pond and secondary sedimentation tank, water leg is arranged on sedimentation tank crossbeam, and the water in pond is entered in water leg by overflow.
Pond water could flow in water leg after must reaching water leg flood level, during the water inlet of sky pond, pond, reaches at the bottom of water leg and gradually rise to water leg in the process of flood level to bear bigger buoyancy at water level；During the water emptying of pond, pool inner water position declines rapidly, but the water in water leg can not decline simultaneously, and water leg bears bigger hydraulic pressure.
So when manufacturing and designing, water leg requirement of strength is higher and sedimentation tank supporting construction requirement of strength is higher, connect and want reliable, the phenomenons such as water leg floating, torsional deformation can occur often.Being generally and be easy to Inlet and outlet water, at spaced openings at the bottom of water leg, but be easily formed spring one by one at the bottom of pond, a large amount of float are gone out from hole with current, affect effluent quality.
Summary of the invention
It is an object of the invention to for above-mentioned the problems of the prior art, it is provided that the anti-floating system of a kind of water process sedimentation tank water leg, described anti-floating system can be automatically adjusted water leg water level according to SEA LEVEL VARIATION inside and outside water leg.
To achieve these goals, the technical scheme is that the anti-floating system of a kind of water process sedimentation tank water leg, water leg is arranged on from the crossbeam that pool wall cantilevers out, it is characterized in that water leg side-wall hole, tapping arranges flap valve, and crossbeam is additionally provided with a suspension bracket, suspension bracket is provided with pulley and the cable wire matched with this pulley, one end of cable wire is connected with the lower end of flap valve, and the other end of cable wire and a floating drum connect, floating drum be connected with a pedestal.
The present invention utilizes water leg side-wall hole, flap valve is set simultaneously, walk around pulley by cable wire and connect floating drum, control flap valve opening and closing by the height of sedimentation tank water level, Chi Shui can be greatly reduced to water leg buoyancy, reduce the active force to water leg, reduce its structural requirement, reduce civil engineering construction cost, with former directly compared with the method for water leg bear, also significantly improve effluent quality.
Accompanying drawing explanation
Fig. 1 is the installation site schematic diagram of the present invention.
Fig. 2 float resistant apparatus for water accumulating tank structural representation of the present invention.
Fig. 3 is one of force diagram of the present invention.
Fig. 4 is the two of the force diagram of the present invention.
Fig. 5 is the three of the force diagram of the present invention.
Fig. 6 is the four of the force diagram of the present invention.
Fig. 7 is the floor map of the sedimentation tank of the present invention.
Detailed description of the invention
Fig. 1 is typical circular settling tank schematic diagram, and water leg 1 is arranged on from the crossbeam 3 that pool wall cantilevers out, and the anti-floating system 2 of the present invention is also installed on crossbeam 3.
This device constructs as shown in Figure 2, a kind of anti-floating system of water process sedimentation tank water leg, crossbeam 3 is had between primary sedimentation pond or secondary sedimentation tank and water leg 1, it is characterized in that water leg 1 side-wall hole 4, perforate 4 place arranges flap valve basis 5, flap valve basis is provided with flap valve 6, crossbeam 3 is additionally provided with a suspension bracket 7, suspension bracket 7 is provided with pulley 8 and the cable wire 10 matched with this pulley 8, one end of cable wire 10 is connected with the lower end of flap valve 6, the other end and a floating drum 9 of cable wire 10 connect, floating drum 9 be connected with a pedestal 11.Described position of opening should be arranged on the bottommost of described water leg 1 sidewall.Described flap valve 6 is obliquely installed, and is 5 ° ~ 30 ° with the angle of vertical direction, so can ensure flap valve close time seal while, take into account the unlatching of flap valve.
Owing to flap valve 6 tilts to install, when cable wire 10 pine, when the vertical force component of pulling force is less than the gravity of flap valve, flap valve 6 is closed.When cable wire 10 is tight, when the vertical force component of pulling force is more than the gravity of flap valve, flap valve 6 is opened.Cable wire is provided pulling force by floating drum, and floating drum is to gravity by floating drum of the pulling force of cable wire and buoyancy combined effect.The opening and closing of flap valve thus can be controlled by the change of water level.
Below in conjunction with each stage accompanying drawing of intaking, the specific embodiment of the invention is further analysed, for convenience of discussing, following parameter is set:
m1--flap valve quality m2--the quality of floating drum
Volume in T--cable wire tension V--immersion water
With the angle of horizontal direction after θ--angle, θ of cable wire and vertical direction '--flap valve closedown
N--floating drum pedestal is for the basic holding power for flap valve of holding power N'--flap valve of floating drum
The density h--height of water level of ρ--water
P--water is for the pressure h of flap valve0--the height of floating drum pedestal
1.h < H2(floating drum pedestal absolute altitude)
As it is shown on figure 3, water level is not higher than floating drum pedestal, so floating drum is not affected by buoyancy, now flap valve is maximum opening, and stress meets simultaneously:
2T·cosθ=m1·g1.1
T+N=m2·g1.2
Floating drum should be placed on pedestal, and mutual pressure between pedestal, therefore N >=0 in formula, release and need to meet in this situationNow flap valve standard-sized sheet, enters water leg, makes water level balance inside and outside tank, it is not necessary to anti-floating during waterborne liter of sedimentation tank.
2.H2(floating drum pedestal absolute altitude) < h < H3(floating drum starts the absolute altitude that floats)
As shown in Figure 4, water level is higher than floating drum pedestal, but buoyancy is less than the required minimal buoyancy of floating drum floating, and now flap valve is still in maximum opening, and stress meets simultaneously:
2T·cosθ=m1·g2.1
T+ρ·v·g+N=m2·g2.2
In this course, along with the rising of water level, the flooding volume V of floating drum is gradually increased, and buoyancy is gradually increased, and its dependent variable is all constant, therefore N is gradually reduced, as N=0, for critical state, now h=H3, along with water level continues to raise, namely floating drum starts to float.
3.H3(floating drum starts the absolute altitude that floats) < h < H4(flap valve closedown absolute altitude)
As it is shown in figure 5, water level is higher than H3, namely floating drum starts to float, but lower than H4, now flap valve is in the state of progressively closing off, and stress meets simultaneously:
2T·cosθ=m1·g3.1
T+ρ·v·g=m2·g3.2
As it is shown in figure 5, along with floating drum floats, flap valve progressively closes off, θ increases, and cos θ reduces, m1G remains unchanged, by formula 3.1 it can be seen that T increases.M2G remains unchanged, then buoyancy ρ v g reduces, and this just illustrates that flooding volume v constantly reduces in the process, namely illustrates that the volume that floating drum surfaces in the process floated is ever-increasing.
Work as h=H4Time,Owing to θ is maximum, now T reaches maximum.
4.H4(flap valve closedown absolute altitude) < h≤H5(operating water level)
As shown in Figure 6, h is worked as > H4After, flap valve is closed, and now flap valve pedestal produces holding power N ' for flap valve, simultaneously because flap valve is closed, water leg inside and outside can produce water-head (h-H4), thus flap valve being produced pressure P, stress meets:
2T cos θ+(N '-P) cos θ '=m1·g4.1
T+ρ·v·g=m2·g4.2
By formula 4.2 it can be seen that along with the increase of flooding volume V, buoyancy is continuously increased, and m2G remains unchanged, then T is gradually reduced, and convolution 4.1 is it can be seen that along with water level constantly raises, inside and outside water leg, water-head constantly becomes big, and P increases therewith, and m1G remains unchanged, it is known that N ' is gradually increased, and this is conducive to the sealing of flap valve.
Simultaneously by formula 4.2 it can be seen that now can not emerge as met floating drum, then T > 0, therefore m can be drawn2G-ρ v g > 0, releasesIf floating drum floats on can affect the properly functioning of sedimentation tank on the water surface, therefore for meeting this condition, the density of floating drum need to more than the density of water.
Said process (1. ~ 4.) it is water inlet process analysis, by this process, (4. ~ 1.) is emptying process in turn, as can be seen here, this device carrys out the opening and closing of hole on domination set tank by the height of water level so that its inside and outside water UNICOM or separate, and decreases requirement of strength when anti-floating and emptying during water leg water inlet, thus reduce the structural requirement of water leg, thus reducing civil engineering construction cost, with former compared with the anti-float method of water leg bottom opening, also significantly improve effluent quality.
Five, key parameter
1. water leg opening diameter d
The perforate of water leg need to ensure that water potential in water leg raises simultaneously along with the water level in whole pond or reduces, so can not be too small；Simultaneously excessive also without necessity, herein below discusses with regard to the opening diameter d of water leg.
Fig. 7 is sedimentation tank floor map, and wherein dash area is water leg, and D is sedimentation tank diameter, d1For water leg inner ring diameter, d2For water leg race diameter.
Ensure that the water level inside and outside water leg is substantially contour, then SEA LEVEL VARIATION speed need to keep consistent, it is assumed that (caliber is D to current with sedimentation tank water inlet pipe by the flow velocity of perforate d on water leg in water inlet or emptying processWater inlet pipe) flow velocity is identical, can draw water inlet pipe sectional area and the ratio (S of perforate sectional area on water legWater inlet pipe/SHole) and the ratio (S of area of area and water leg of sedimentation tankSedimentation tank/SWater leg) equal, it is formulated as:
In above formula, S represents area, then can release:
Simplify formula further, can obtainThe numerical value now obtained, for dHoleThe minimum value that need to meet, if this numerical value is excessive relative to water leg Sidewall Height, inconvenience is implemented, and can open n hole, then on water legRegulate the population size of n so that described opening diameter dHole?Between.
Wherein DWater inlet pipeFor sedimentation tank water inlet pipe caliber, D is sedimentation tank internal diameter, d1For ring-type water leg internal diameter, d2For ring-type water leg external diameter, dHoleFor opening diameter, L is water leg height, and n is number of aperture).
2. flap valve closes absolute altitude (H4)
By the principle Analysis of this device before and Fig. 3 ~ Fig. 6 it can be seen that flap valve closes absolute altitude (H4) it is very important parameter.If H4Too low, then flap valve is closed too early, it is impossible to making to keep inside and outside water leg UNICOM, the anti-floating effect of this device is subject to adverse effect.If H4Too high, then flap valve can be caused to close, or cause floating drum to surface.H4Value is advisable with 4/3rds to five/4ths effluent trough height of effluent trough, now both can guarantee that flap valve will not be closed too early, and had surfaced without making floating drum.If water leg height is L, thenWherein H1For water leg elevation of bottom.
In actual use, it is possible to by calculating, by adjusting base height h0, floating drum carried out counterweight adjust H4Height, finally give optimum efficiency.
Claims (2)
1. a water processes with the anti-floating system of sedimentation tank water leg, water leg is arranged on from the crossbeam that pool wall cantilevers out, it is characterized in that water leg side-wall hole, tapping arranges flap valve, and crossbeam is additionally provided with a suspension bracket, suspension bracket is provided with pulley and the cable wire matched with this pulley, one end of cable wire is connected with the lower end of flap valve, and the other end of cable wire and a floating drum connect, floating drum be connected with a pedestal, described water leg sidewall offers n perforateRegulate perforate number n so that described opening diameter d hole existsBetween, wherein DWater inlet pipeFor sedimentation tank water inlet pipe caliber, D is sedimentation tank internal diameter, and d1 is ring-type water leg internal diameter, and d2 is ring-type water leg external diameter, and d hole is opening diameter, and L is water leg height, and n is number of aperture.
2. by the anti-floating system described in claim 1, it is characterised in that: flap valve is obliquely installed, and is 5 °～30 ° with the angle of vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367924.6A CN103691166B (en) | 2012-09-28 | 2012-09-28 | A kind of anti-floating system of water process sedimentation tank water leg |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367924.6A CN103691166B (en) | 2012-09-28 | 2012-09-28 | A kind of anti-floating system of water process sedimentation tank water leg |
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| CN103691166A CN103691166A (en) | 2014-04-02 |
| CN103691166B true CN103691166B (en) | 2016-06-29 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234810A (en) * | 2008-03-11 | 2008-08-06 | 上海市政工程设计研究总院 | Water collecting sink anti-floating equipment |
| CN201216891Y (en) * | 2008-07-08 | 2009-04-08 | 南通华新环保设备工程有限公司 | Float resistant apparatus for water accumulating tank |
| DE102009025388A1 (en) * | 2008-12-17 | 2010-06-24 | Opanski, Josef Zoltan, Dipl.-Ing. (FH) | Device for protecting container of separating device i.e. volatile liquid separator, against penetration of liquid over outlet of container, has valve opening located along flow direction of liquid over outlet behind outlet opening |
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2012
- 2012-09-28 CN CN201210367924.6A patent/CN103691166B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234810A (en) * | 2008-03-11 | 2008-08-06 | 上海市政工程设计研究总院 | Water collecting sink anti-floating equipment |
| CN201216891Y (en) * | 2008-07-08 | 2009-04-08 | 南通华新环保设备工程有限公司 | Float resistant apparatus for water accumulating tank |
| DE102009025388A1 (en) * | 2008-12-17 | 2010-06-24 | Opanski, Josef Zoltan, Dipl.-Ing. (FH) | Device for protecting container of separating device i.e. volatile liquid separator, against penetration of liquid over outlet of container, has valve opening located along flow direction of liquid over outlet behind outlet opening |
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| CN103691166A (en) | 2014-04-02 |
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