CN204679098U - A kind of experimental provision analyzing drainage pipeline alluvial characteristic - Google Patents
A kind of experimental provision analyzing drainage pipeline alluvial characteristic Download PDFInfo
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- CN204679098U CN204679098U CN201520420919.6U CN201520420919U CN204679098U CN 204679098 U CN204679098 U CN 204679098U CN 201520420919 U CN201520420919 U CN 201520420919U CN 204679098 U CN204679098 U CN 204679098U
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Abstract
The utility model provides a kind of experimental provision analyzing drainage pipeline alluvial characteristic, and this device comprises cistern, constant current water tank, testing conduit, water tank; Cistern is by reflux pump to described constant current cistern water supply, and the water in constant current water tank flows into the water inlet of testing conduit with the constant rate preset, and the water delivering orifice of testing conduit is communicated with water tank; Testing conduit is provided with several water level monitoring vertical tubes, and the gradient of testing conduit is adjustable, is provided with the barrier for simulating alluvial situation in testing conduit.
Description
Technical field
The utility model relates to a kind of experimental provision analyzing drainage pipeline alluvial characteristic.
Background technology
Sewage is collected by drainage pipeline and is discharged into treatment facility, but the suspended solid in sewage can precipitate in course of conveying.Along with the growth of drainage pipeline service time, the possibility of alluvial sharply increases.Pipeline alluvial blocking is the major issue faced in drainage pipeline networks daily operation management.Sediment alluvial waterpower can cause frictional head loss to increase, cause impeded drainage, cause the overload operation of unwatering system and combined sewer overflow to arrive in advance, even overflow road surface, cause ponding and contaminated environment.
Current operational management lacks the technological means grasping drainage pipeline networks actual operating state, be difficult to the daily alluvial situation of evaluation of subterranean drainage pipeline networks, the hydraulic analysis and maintenance desilting management of drainage pipeline networks lack necessary Data support.Along with Informatization Development and modern drainage management demand, in drainage pipeline, outfit monitoring equipment and professional computation model necessitate.Therefore a kind of hydraulic set probing into drain line blockage situation and ga ge relation of exploitation is badly in need of, the monitoring characteristic rule that pipeline deposits being applied to drainage pipeline networks, by arranging liquid level gauge in inspection chamber, collecting waterlevel data for a long time, in conjunction with waterpower model analysis, optimize maintenance management work.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of experimental provision analyzing drainage pipeline alluvial characteristic.
According to a kind of experimental provision analyzing drainage pipeline alluvial characteristic that the utility model provides, comprising: cistern, constant current water tank, testing conduit, water tank;
Described cistern is by reflux pump to described constant current cistern water supply, and the water in described constant current water tank flows into the water inlet of described testing conduit with the constant rate preset, and the water delivering orifice of described testing conduit is communicated with described water tank;
Described testing conduit is provided with several water level monitoring vertical tubes,
The gradient of described testing conduit is adjustable, is provided with the barrier for simulating alluvial situation in described testing conduit.
As a kind of prioritization scheme, described constant current water tank comprises interior case, water jacket, water inlet pipe, overflow pipe, constant current water delivering orifice;
Described interior case is provided with steady flow baffle between described constant current water delivering orifice and water inlet pipe, and described water jacket is located on the outer wall of described interior case, and the Single port of described overflow pipe is communicated with described water jacket, and another port is connected to described cistern;
Water in described cistern is introduced described interior case by described water inlet pipe by described reflux pump, the aquifer yield that the inflow of described water inlet pipe exceedes described constant current water delivering orifice makes the water in described interior case be spilled over to described water jacket, and the water in described water jacket flows into described cistern by described overflow pipe.
As a kind of prioritization scheme, described constant current water tank also comprises adjustable for height base for supporting.
As a kind of prioritization scheme, the transparent observation wall of described water level monitoring vertical tube is provided with level scale.
As a kind of prioritization scheme, described water level monitoring vertical tube is installed on described testing conduit by three-way connector.
As a kind of prioritization scheme, comprise an adjustable pipe support, described testing conduit is installed on described adjustable pipe support, and described adjustable pipe support for supporting described testing conduit, and arranges the gradient of this testing conduit.
As a kind of prioritization scheme, described water tank is communicated with by a recirculatory pipe with described cistern, and described recirculatory pipe is also provided with the retaining valve flowing to water tank for anti-sealing from described cistern, and opens or close the reverse flow valve of described recirculatory pipe.
As a kind of prioritization scheme, described constant current water tank is connected to the water inlet of described testing conduit by flexible pipe and horizontal connection tube; Described horizontal connection tube is provided with flow control valve and flowmeter;
Entered the water inlet of described testing conduit by described horizontal connection tube after water in described constant current water tank flows into described flexible pipe.
As a kind of prioritization scheme, described flow counts ultrasonic flow meter.
Compared with prior art, the utility model has following beneficial effect:
In the utility model, constant current water tank is made up of interior case and water jacket, reduces volume, saves cost, and alleviates water tank weight.
Adjustable for height water tank and pipe support is with the addition of, the adjustable testing conduit gradient, the situation of change of waterpower in convenient research different gradient situation in the utility model.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, obviously, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.In accompanying drawing:
Fig. 1 is self-loopa frictional head loss experimental provision of the prior art;
Fig. 2 is the alluvial view of the testing conduit in embodiment;
Fig. 3 is a kind of experimental provision structural representation analyzing drainage pipeline alluvial characteristic in embodiment;
Fig. 4 is the adjustable for height base for supporting structural representation of a kind of constant current water tank in embodiment;
Fig. 5 is a kind of adjustable tube shelf structure schematic diagram in embodiment.
In figure, A1-. differential water pressures meter, A2-measuring cell, A3-experimental channel, A4-mercury differential manometer, A5-slip dip stick, A6-flowing water Valve, A7-water intaking valve, A8-tube of pressure-stabilizing;
1-constant current water tank, case in 2-, 3-water jacket, 4-dividing plate, 5-flexible pipe, 6-flow control valve, 7-flowmeter, 8-testing conduit, 9-joint flange, 10-water level monitoring vertical tube, 11-water tank, 12-barrier, 13-recirculatory pipe, 14-cistern, 15-reflux pump, 16-water inlet pipe, 17-run-down pipe, the adjustable for height base for supporting of 18-, 19-tetra-pin brandreth, 20-lifting jack, 21-is adjustable pipe support.
Embodiment
Hereafter in the mode of specific embodiment, the utility model is described in detail by reference to the accompanying drawings.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that the embodiment that can also use other, or the amendment on 26S Proteasome Structure and Function is carried out to the embodiment enumerated herein, and scope of the present utility model and essence can not be departed from.
Fig. 1 is according to the experimental provision that hydromechanical frictional head loss experimental principle is set up in prior art.The experimental principle of frictional head loss experiment calculates pipeline frictional resistant coefficient according to Darcy formula (1), and see formula (2), Fig. 1 is self-loopa frictional head loss experimental provision.
In formula, h
f---frictional head loss, unit m;
D---pipe diameter, unit m;
λ---frictional resistant coefficient, λ=8g/C
2;
L---duct length, unit m;
V---water-carrying section mean flow rate, unit m/s;
G---acceleration of gravity, unit m/s
2;
Q---flow, unit m
3/ s;
C---thank to just coefficient.
The experimental technique of Fig. 1 and step:
Prepare I comparison device Fig. 1 and explanation, get the title of each building block, effect and principle of work thereof clear; Record relevant experimental constant: instrumentation tubes internal diameter d and experiment pipe range L.
Prepare II and start water pump.First open flowing water Valve, then open water intaking valve, more slowly reduce flowing water Valve aperture; Deng the water in tube of pressure-stabilizing suitable time, close the exhausr port of tube of pressure-stabilizing.
Prepare III and adjust flux examining system.
(1) check whether piezometric tube inner air tube drains.
(2), after experimental provision water flowing exhaust, experiment measuring can be carried out.Under the prerequisite of water intaking valve, outlet valve standard-sized sheet, successively reduce outlet valve aperture, if there is water to overflow from piezometric tube, then suitably reduce water intaking valve aperture, after each adjust flux, stablize 2 ~ 3 minutes, then measure each piezometric surface value with slide rule, and measure flow with graduated cylinder stopwatch, use thermometer testing temperature.The time of each measuring flow should be longer than 10 seconds.
(3) experiment terminates first to close outlet valve 10, checks specific pressure meter whether back to zero, then valve-off 11, and cuts off the electricity supply.
Prior art shown in Fig. 1, due to its bending pipeline configuration, is unsuitable for thing of placing obstacles, and therefore uses this structure can not reach the effect of expectation when carrying out drainage pipeline alluvial specificity analysis.
The utility model provide a kind of analyze drainage pipeline alluvial characteristic experimental provision embodiment in, as shown in Figure 3, comprising: cistern, constant current water tank, testing conduit, water tank;
Described cistern is by reflux pump to described constant current cistern water supply, and the water in described constant current water tank flows into the water inlet of described testing conduit with the constant rate preset, and the water delivering orifice of described testing conduit is communicated with described water tank;
Described testing conduit is provided with several water level monitoring vertical tubes,
The gradient of described testing conduit is adjustable, is provided with the barrier for simulating alluvial situation in described testing conduit.
As a kind of embodiment, described constant current water tank comprises interior case, water jacket, water inlet pipe, overflow pipe, constant current water delivering orifice;
Described interior case is provided with steady flow baffle between described constant current water delivering orifice and water inlet pipe, and described water jacket is located on the outer wall of described interior case, and the Single port of described overflow pipe is communicated with described water jacket, and another port is connected to described cistern;
Water in described cistern is introduced described interior case by described water inlet pipe by described reflux pump, the aquifer yield that the inflow of described water inlet pipe exceedes described constant current water delivering orifice makes the water in described interior case be spilled over to described water jacket, and the water in described water jacket flows into described cistern by described overflow pipe.
As shown in Figure 3, a kind of experimental provision analyzing drainage pipeline alluvial characteristic, described constant current water tank 1 utilizes liquid level difference one timing, and the principle design of vertical water outflowing jet constant flow, be made up of interior case 2 and water jacket 3, centre is provided with dividing plate 4, for stable water outlet fluidised form.When the inflow of permanent water tank exceedes aquifer yield, the unnecessary water yield is from the rectangle thin-wall weir overflow of interior case 2 to water jacket 3.Water in water jacket 3 flows out from the run-down pipe 17 of water jacket 3 again, returns cistern 14.Be provided with draining valve bottom interior case 2, be convenient to emptying and cleaning water tank.In interior case, liquid level keeps constant with interior case heights of roofs always, thus obtains invariable hydraulic pressure at constant current water delivering orifice, and when constant current water delivering orifice aperture is constant, its Water discharge flow speed is constant.And water inlet pipe and constant current water delivering orifice are isolated by dividing plate 4 to a certain extent, prevent the phenomenons such as the eddy current caused into water and affect water state, this dividing plate is conducive to stable constant current water outlet.
The water yield that described constant current water tank 1 is exported by flexible pipe 5 is after the flow regulation of flow control valve 6, and transfer to testing conduit 8 after being measured by flowmeter 7, the caliber of testing conduit 8 is 75mm.
As a kind of embodiment, described constant current water tank is connected to the water inlet of described testing conduit by flexible pipe and horizontal connection tube; Described horizontal connection tube is provided with flow control valve and flowmeter;
Entered the water inlet of described testing conduit by described horizontal connection tube after water in described constant current water tank flows into described flexible pipe.
Described flexible pipe is adopted to be pipeline still can be kept to be connected when conveniently testing conduit and constant current water tank highly regulate separately as intermediate connector in the present embodiment.The use of horizontal connection tube is that the water inlet of horizontal connection tube and testing conduit is fixed in order to install described flow control valve and flowmeter.
As a kind of embodiment of flowmeter 7, described flowmeter 7 is ultrasonic flow meter.
For ensureing to obtain discharge exactly, install the horizontal connection tube interior maintenance full-section pipe-flow state of flowmeter 7, connecting tube is the plexi-glass tubular of level, and caliber is 50mm.Described testing conduit 8 is plexi-glass tubular, and testing conduit 8 can be the pipeline connected by joint flange 9 by many, forms detachable pipeline.
Be provided with water level monitoring vertical tube 10 in the middle of testing conduit 8, testing conduit 8 end is provided with water delivering orifice, and water is disposed to water tank 11.The transparent observation wall of described water level monitoring vertical tube 10 is provided with level scale.Described water level monitoring vertical tube 10 is installed on described testing conduit 8 by three-way connector.Three-way connector upper end connects water level monitoring vertical tube 10, and water level monitoring vertical tube 10 is also for dropping into described barrier.Described barrier 12 is for simulating pipeline inside deposition thing.
As a kind of embodiment, described water tank 11 is communicated with by a recirculatory pipe 13 with described cistern 14, and described recirculatory pipe 13 is also provided with the retaining valve flowing to water tank 11 for anti-sealing from described cistern 14, and opens or close the reverse flow valve of described recirculatory pipe.Water conservancy reflux pump 15 in described cistern 14 promotes, and flows into interior case 2 by water inlet pipe 16, forms hydraulic system; Water inlet pipe 16 end is provided with water inlet pipe control valve, for controlling water inlet pipe uninterrupted.The gradient tendency floss hole of 1% is all set bottom water tank 11 and cistern 14, is convenient to water tank cleaning with emptying.
As shown in Figure 3-Figure 5, the simulation fluidised form of this experimental provision is attached most importance to power stream, and described constant current water tank 1 also comprises adjustable for height base for supporting 18.As a kind of embodiment, described adjustable for height base for supporting 18 is made up of four pin brandreths 19 and lifting jack 20.Described four pin brandreths 19 are provided with jack and latch, the height of adjustable foot rest thus.Described lifting jack 20 is positioned in the middle of four pin brandreths 19, is placed on the submounts of level altitude, raises inlet water tank 1, whole movable supporting is had simple to operate, feature easy to adjust before regulating foot rest height.Described adjustable for height base for supporting 18 can be various structures, and the utility model is not limited thereto.
As a kind of embodiment, the utility model also comprises an adjustable pipe support 21, and described testing conduit 8 is installed on described adjustable pipe support 21, and described adjustable pipe support 21 for supporting described testing conduit 8, and arranges the gradient of this testing conduit 8.Described adjustable pipe support 21 is provided with nut and screw rod, is raised by testing conduit 8 as required or reduces, for the gradient that flexible testing conduit 8 sets.
Described water tank fixed support 22 is for supporting water tank 11, highly fixing.
The utility model application to be deposited the method for characteristic with a kind of drainage pipeline of analyzing, and comprising:
Steps A, obtain current drainage pipeline parameter, described drainage pipeline parameter comprises the pipe bottom sloping of drainage pipeline to be analyzed, and/or the flow velocity of water inlet, and/or Obstacle Position, and/or barrier specification, and determine that the first monitoring location and the second monitoring location are at the first hydraulic gradient i under thing state that do not place obstacles
awith the second hydraulic gradient i be provided with under barrier state
b;
Step B, determines according to described first hydraulic gradient and the second hydraulic gradient the pipeline alluvial index evaluating current drainage pipeline
obtain single experiment array, this single experiment array comprises the drainage pipeline parameter of described pipeline alluvial index K and correspondence thereof;
Step C, changes described drainage pipeline parameter, after repeating said steps A to step B obtains the described single experiment array of predetermined number, builds the alluvial family curve of drainage pipeline according to the described single experiment array of predetermined number.
As a kind of embodiment, the first monitoring location described in steps A and the second monitoring location are at the first hydraulic gradient i under thing state that do not place obstacles
awith the second hydraulic gradient i be provided with under barrier state
bdefining method be specially:
Under thing state of not placing obstacles in drainage pipeline to be analyzed, obtain the water level of the first monitoring location and the second monitoring location, and then obtain the first water-head Δ H under thing state of not placing obstacles
a=H
a1-H
a2, thus determine the first hydraulic gradient
wherein, H
a1be the water level of the first monitoring location, H
a2be the water level of the second monitoring location, L is the spacing of the first monitoring location and the second monitoring location;
Place obstacles in drainage pipeline to be analyzed between described first monitoring location and the second monitoring location thing state under, obtain the water level of described first monitoring location and the second monitoring location, and then obtain the second water-head Δ H be provided with under barrier state
b=H
b1-H
b2, thus determine the second hydraulic gradient
wherein, H
b1be the water level of the first monitoring location, H
b2be the water level of the second monitoring location, L is the spacing of the first monitoring location and the second monitoring location.
By said method application with use above-mentioned analysis drainage pipeline deposit the experimental provision of characteristic time, the method is specially:
Step 1, upgrades the gradient, the flow velocity of water inlet, Obstacle Position, the barrier specification that arrange described testing conduit;
Step 2, under the state of thing of not placing obstacles in testing conduit, according to the water level reading H of two water level monitoring vertical tubes
a1, H
a2obtain the first water-head Δ H
a=H
a1-H
a2;
Place obstacles in testing conduit between described two water level monitoring vertical tubes thing state under, according to the water level reading H of described two water level monitoring vertical tubes
b1, H
b2obtain the second water-head Δ H
b=H
b1-H
b2;
Step 3, according to described first water-head and the second water-head determination pipeline alluvial index
obtain a single experiment array, this single experiment array comprises pipe bottom sloping, the flow velocity of water inlet, Obstacle Position, the barrier specification of the drainage pipeline to be analyzed of described pipeline alluvial index K and correspondence thereof;
Step 4, repeating said steps 1 to step 3 obtains the alluvial family curve that some described experiment arrays build drainage pipeline.
The specification of described barrier includes average length and the height value of barrier.
The Measurement and analysis of above-mentioned steps A can be simplified in open channel uniform flow situation, under thing state of not placing obstacles, think that hydraulic gradient equals pipe bottom sloping, i.e. i
a=i
a', wherein i
a' be the pipe bottom sloping of described drainage pipeline to be analyzed, i
afor hydraulic gradient, due to Δ H=i × L, therefore at the bottom of the pipe of two monitoring locations, the difference of absolute altitude equals the water-head of the first monitoring location and the second monitoring location, Δ H
a=Δ H
a', L is the distance of the first monitoring location and the second monitoring location.Now a kind of drainage pipeline of analyzing deposits in the method for characteristic, and the first monitoring location described in steps A and the second monitoring location are at the first hydraulic gradient i under thing state that do not place obstacles
awith the second hydraulic gradient i be provided with under barrier state
bdefining method be specially:
Under thing state of not placing obstacles in drainage pipeline to be analyzed, the first hydraulic gradient of described first monitoring location and the second monitoring location equals the pipe bottom sloping of described drainage pipeline to be analyzed, thus determines the first hydraulic gradient i
a=i
a', wherein, i
a' be the pipe bottom sloping of described drainage pipeline, L is the spacing of the first monitoring location and the second monitoring location;
Place obstacles in drainage pipeline to be analyzed between described first monitoring location and the second monitoring location thing state under, obtain the water level of described first monitoring location and the second monitoring location, and then obtain the second water-head Δ H be provided with under barrier state
b=H
b1-H
b2, thus determine the second hydraulic gradient
wherein, H
b1be the water level of the first monitoring location, H
b2be the water level of the second monitoring location, L is the spacing of the first monitoring location and the second monitoring location.
Sedimental accumulation reduces conveying space, the increase resistance to water-flow of pipeline, causes the decline of discharge of pipes ability, thus the water levels of upstream and downstream difference causing alluvial pipeline increases.In non-uniform flow, the depth of water and flow velocity all become along journey.Under stopping state, the upstream depth of water is greatly darker than downstream, then known according to Manning formula (3), upstream flow rate is less than downstream flow velocity, therefore loss of flood peak h
f: h
f=Δ H+ α (v
1 2-v
2 2)/2g, is less than water-head Δ H, wherein α (v
1 2-v
2 2)/2g is that the kinetic head of upstream and downstream monitoring location is poor, and wherein α is coefficient, and in the present embodiment, α is 1.If do not consider, kinetic head is poor, i.e. v
1=v
2, obtain h
f=Δ H.Known according to the conversion formula (4) of Manning formula, if constant along journey flow velocity v, the existence of tamper causes the increase of hydraulic gradient (i=Δ H/L).Therefore according to the situation of change of water-head (Δ H), pipe interior fouling status can be judged for same pipeline (pipe range L is identical).
In formula: v-flow velocity, m/s; R-hydraulic radius, m; N-Manning's roughness coefficient; I-hydraulic gradient.
Fig. 2 is the alluvial schematic diagram of drainage pipeline.When being in steady flow state, be respectively H without alluvial pipeline upstream and downstream inspection chamber wastewater level
a1and H
a2, and the pipeline water levels of upstream and downstream that deposits is respectively H
b1and H
b2.The upstream and downstream inspection chamber water-head of two kinds of situations is respectively Δ H
a=H
a1-H
a2with Δ H
b=H
b1-H
b2.
At this moment introduce the relative change indicator of water level and pipeline alluvial index K, it refers to certain period after turn on pump, the upstream and downstream inspection chamber hydraulic gradient i of alluvial pipeline
bwith the hydraulic gradient i of corresponding period without the pipeline deposited
aratio, for same pipeline (pipe range is equal), i.e. water-head Δ H
bwith Δ H
aratio.L is the distance between two observation stations.
K value is larger, and show that pipeline alluvial is more serious, the desilting maintenance work of this pipeline is more urgent.
To achieve these goals, have employed following technical scheme in the present invention:
As Fig. 3, open water inlet pipe valve input tap water, can form equal uniform flow under normal circumstances, the depth of water of equal uniform flow is constant along journey, and water surface curve is parallel with at the bottom of canal, measures without water-head Δ H during blocking
a; If there is sediment blocking, sediment affect pipeline water flow, reduces the discharge capacity of pipeline, and blocking upstream causes water level to rise due to impeded drainage, and the downstream water yield is drained and water level decreasing rapidly, therefore water-head increase, measure the water-head Δ H of blocking pipe
b.Therefore, utilize the situation of change according to water-head, calculate water level relative change indicator K, probe into the relation of itself and pipe interior chocking-up degree.
During concrete enforcement, the invention provides a kind of said apparatus research pipe interior sediment that adopts to the method for water-head (Δ H) variable effect, comprise the following steps:
(1) ultrasonic flow meter is installed;
(2) testing conduit pipe support height is regulated, position and the height of record internal diameter of the pipeline, monitoring water level point;
(3) drop into barrier, record the material of described barrier, position and size;
(4) first open flow control valve and water inlet pipe control valve, start reflux pump, under the prerequisite of water intaking valve standard-sized sheet, successively reduce flow regulation valve opening, treat stable level 2 ~ 3 minutes, record now flow, blocking water levels of upstream and downstream;
(5) the equal duplicate measurements of each experiment three times;
(6) closing volume pump and water inlet pipe control valve, takes out tamper, residual ponding is drained;
(7) before carrying out chocking-up degree assessment experiment, all need to carry out the experiment of clear state under same case, the water level reading of recording flowmeter reading and identical monitoring point at every turn;
(8) disposal data, calculates pipeline alluvial index according to formula (5)
(9) repeat above step, probe into the impact on pipeline alluvial index of different chocking-up degree, flow and the gradient.
Compared with the prior art in Fig. 1, the present invention has following advantage:
1. constant current water tank of the prior art is made up of inner water tank and outer water tank, and consumptive material is many, and cost is expensive, and in the present invention, constant current water tank is made up of interior case and water jacket, reduces volume, saves cost, and alleviates water tank weight;
2. in prior art, experimental channel is the fixing gradient, with the addition of adjustable for height water tank and pipe support, the adjustable testing conduit gradient in the present invention, the situation of change of waterpower in convenient research different gradient situation;
3. prior art is only for full-section pipe-flow design, and the present invention is applicable to full-section pipe-flow and partly-filled pipe-flow state;
4. use graduated cylinder measurement of discharge in prior art, precision is low, adopts ultrasonic flow meter in the present invention, and precision is high and measurement is convenient;
5. prior art is mainly used in studying the rule that pipeline linear loss and linear loss change with mean flow rate, the different chocking-up degree of tamper simulation pipe interior of different size is added, for analyzing the hydraulic performance change of pipeline under different chocking-up degree in the present invention.
The foregoing is only preferred embodiment of the present utility model, those skilled in the art know, when not departing from spirit and scope of the present utility model, can carry out various change or equivalent replacement to these characteristic sum embodiments.In addition, under instruction of the present utility model, can modify to adapt to concrete situation and material to these characteristic sum embodiments and spirit and scope of the present utility model can not be departed from.Therefore, the utility model is not by the restriction of specific embodiment disclosed herein, and the embodiment in the right of all the application of falling into all belongs to protection domain of the present utility model.
Claims (9)
1. analyze an experimental provision for drainage pipeline alluvial characteristic, it is characterized in that, comprising: cistern, constant current water tank, testing conduit, water tank;
Described cistern is by reflux pump to described constant current cistern water supply, and the water in described constant current water tank flows into the water inlet of described testing conduit with the constant rate preset, and the water delivering orifice of described testing conduit is communicated with described water tank;
Described testing conduit is provided with several water level monitoring vertical tubes,
The gradient of described testing conduit is adjustable, is provided with the barrier for simulating alluvial situation in described testing conduit.
2. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, described constant current water tank comprises interior case, water jacket, water inlet pipe, overflow pipe, constant current water delivering orifice;
Described interior case is provided with steady flow baffle between described constant current water delivering orifice and water inlet pipe, and described water jacket is located on the outer wall of described interior case, and the Single port of described overflow pipe is communicated with described water jacket, and another port is connected to described cistern;
Water in described cistern is introduced described interior case by described water inlet pipe by described reflux pump, the aquifer yield that the inflow of described water inlet pipe exceedes described constant current water delivering orifice makes the water in described interior case be spilled over to described water jacket, and the water in described water jacket flows into described cistern by described overflow pipe.
3. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 2, it is characterized in that, described constant current water tank also comprises adjustable for height base for supporting.
4. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, the transparent observation wall of described water level monitoring vertical tube is provided with level scale.
5. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, described water level monitoring vertical tube is installed on described testing conduit by three-way connector.
6. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, comprise an adjustable pipe support, described testing conduit is installed on described adjustable pipe support, described adjustable pipe support for supporting described testing conduit, and arranges the gradient of this testing conduit.
7. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, described water tank is communicated with by a recirculatory pipe with described cistern, described recirculatory pipe is also provided with the retaining valve flowing to water tank for anti-sealing from described cistern, and opens or close the reverse flow valve of described recirculatory pipe.
8. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 1, it is characterized in that, described constant current water tank is connected to the water inlet of described testing conduit by flexible pipe and horizontal connection tube; Described horizontal connection tube is provided with flow control valve and flowmeter;
Entered the water inlet of described testing conduit by described horizontal connection tube after water in described constant current water tank flows into described flexible pipe.
9. a kind of experimental provision analyzing drainage pipeline alluvial characteristic according to claim 8, it is characterized in that, described flow counts ultrasonic flow meter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667168A (en) * | 2020-06-04 | 2020-09-15 | 同济大学 | Method for diagnosing running state of drainage system based on liquid level monitoring |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667168A (en) * | 2020-06-04 | 2020-09-15 | 同济大学 | Method for diagnosing running state of drainage system based on liquid level monitoring |
| CN111667168B (en) * | 2020-06-04 | 2024-01-23 | 同济大学 | Method for diagnosing running state of drainage system based on liquid level monitoring |
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