CN112179729A - Pipeline deposit simulation experiment device, experiment system and experiment method - Google Patents
Pipeline deposit simulation experiment device, experiment system and experiment method Download PDFInfo
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- CN112179729A CN112179729A CN201910600656.XA CN201910600656A CN112179729A CN 112179729 A CN112179729 A CN 112179729A CN 201910600656 A CN201910600656 A CN 201910600656A CN 112179729 A CN112179729 A CN 112179729A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
Abstract
The invention discloses a pipeline sediment simulation experiment device, an experiment system and an experiment method. The system increases the number of the water tank assemblies and the number of the pipeline assemblies on the basis of the pipeline sediment simulation experiment device, can simultaneously perform contrast tests on various different sediments or different flow rates, and improves the test efficiency. The invention also discloses a pipeline sediment simulation experiment device, which comprises a water tank assembly, a pipeline assembly and an internal circulation water pump, can be used for a sediment oxygen absorption test, a sediment anti-scouring test under anaerobic conditions and the like, and is an experiment device widely applied to various pipeline sediment simulation experiments.
Description
Technical Field
The invention relates to the technical field of water environment restoration, in particular to a pipeline sediment simulation experiment device, an experiment system and an experiment method.
Background
Erosion resistance of the deposit is commonly referred to as erosion migration characteristics. The research originates from the research of steady walking of deposited sludge of tidal beaches and sea entrances by oceanographic workers.
There are several different methods for quantitative studies of deposit scour resistance.
The most common pipeline scouring experiment is to adopt a section of pipeline (circular or rectangular section) to lay sediment therein, and observe and calculate the amount of particles scoured and flooded by the sediment in a mode of increasing scouring water quantity (hydraulic shearing force) in a stepwise mode. According to the existing hydraulics formula, the shearing force generated by the water flow at a specific flow speed is calculated, the erosion rate of the sediment is defined, and the shearing force of the water flow required by the corresponding erosion of the sediment is obtained, so that the erosion resistance of the sediment is evaluated, and a foundation is laid for the erosion and transportation theory of the sediment.
Another approach is to have a deposit at one bottom. In the device with water on the upper part, the water flow shearing force is provided by stirring the overlying water, the hydraulic shearing force under different stirring rotating speeds is calculated according to a formula, and the erosion rate of bottom sediments is represented by the turbidity change of the overlying water, so that the stability of the sediments is evaluated. In addition, annular water tanks, adhesion gauges, etc. have also been used to measure the erosion resistance of the sediment.
Unlike inorganic gravel, natural sediments including tidal flat silt, estuary silt, river sediment, pipeline sediment, etc. have biochemical activity, exhibit cohesiveness and cohesion. And is therefore referred to as a sticky deposit. The research on the scouring resistance of the water-based engineering is the basis of water-related engineering and related engineering projects, particularly the stability of river slopes and river levees, the movement of coastal sediments, the stability of salt marshes, scouring around piers, navigation, water quality and the like. Prediction of short and long term erosion and deposition rates to detect marine environments is critical to coastal projects.
At present, the study on the scouring resistance of municipal sewage and rainwater pipelines is weak. Most researchers have studied the scour resistance of sediments by synthesis or on-site collection, which are cultured for a period of time in a specific environment. The environmental factors to be controlled include the culture time, which is used for simulating the influence of the days of the previous sunny stage and the consolidation action. Temperature is an important environmental variable, a major factor affecting biological activity in the sediment; oxygen is another important condition influencing biological activities, and the high and low oxygen content directly causes the change of the community structure and diversity of microorganisms in the sediment, thereby influencing the hydraulic condition of the material conversion rate. The stability change of the sediment is explored by changing the water flow shearing force acting on the sediment and simulating the actual pipeline environment.
The experimental procedure included an early deposition phase and a subsequent wash-out phase. During the sedimentation phase, the characteristics (due to biological growth) and structure (due to inter-particle bonding) of the high organic content sediment change continuously with the extension of the culture time, thereby causing the change of the erosion resistance of the sediment.
Disclosure of Invention
The invention aims to provide a pipeline sediment simulation experiment device aiming at the technical defects in the prior art, which comprises a circulating water tank assembly, a water tank assembly and a pipeline assembly and can be used for sediment simulation culture and sediment scour resistance tests.
The invention also aims to provide a pipeline sediment simulation experiment system, which is capable of increasing the number of water tank assemblies and pipeline assemblies on the basis of the pipeline sediment simulation experiment device, simultaneously performing comparison tests on a plurality of different sediments or different flow rates and improving the test efficiency.
The invention also aims to provide a pipeline sediment simulation experiment device, which comprises a water tank assembly, a pipeline assembly and an internal circulation water pump, can be used for sediment oxygen absorption tests, sediment anti-scouring tests under anaerobic conditions and the like, and is an experiment device widely applied to various pipeline sediment simulation tests.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the utility model provides a pipeline deposit simulation experiment device, includes the basin, sets up through angle adjustment mechanism the pipeline reactor and the circulating water tank set spare of basin top, wherein:
the pipeline reactor comprises a circular pipeline for accommodating sediments, and a water inlet and a water outlet are formed at two ends of the circular pipeline respectively;
the one end of basin is equipped with water inlet port, and the other end is equipped with water outlet port, be equipped with in the basin and filter the filter membrane that filters the water that passes through water inlet port and collect the filtration thing, filter membrane detachable assembles in the basin, water inlet port is located the below of delivery port is so that the play water flows by oneself to in the water inlet port, or water inlet port pass through the pipeline with the delivery port is linked together.
The circulating water tank assembly comprises a water tank body, a water pump arranged in the water tank body, a water delivery pipe connected with the water pump and delivering water to the water inlet, and a water return port arranged on the side wall of the bottom of the water tank body, wherein the water return port is communicated with a water return hole arranged at one end of the water tank through a water pipe.
In the above technical scheme, the water pipe is provided with a valve and a flowmeter, and the water pipe is provided with a first one-way valve.
In the technical scheme, the water distributing tracery walls are fixed at the openings at the two ends of the circular pipeline.
In the technical scheme, a small backwater water tank is arranged in the water tank main body, and a second one-way valve is arranged on the side wall of the small backwater water tank so that water in the small backwater water tank flows into the water tank main body in a one-way mode.
The experimental method based on the pipeline deposit simulation experimental device comprises the following steps:
step 1: placing the sediment to be tested or cultured into the pipeline reactor;
step 2: the water pump is turned on, the water flow speed is adjusted, water in the water tank main body is input into the uppermost pipeline reactor through the water delivery pipe and the water inlet, the water flows through the pipeline reactor and then enters the water tank through the water outlet, in the water tank, the filter membrane filters the flowing water, and the water flows back into the water tank main body through the return water hole to be circulated
And step 3: after the operation is carried out for a preset time, the water pump is closed, and the sediment in the pipeline reactor is sampled and analyzed to complete a sediment simulation culture experiment;
or taking out the filter membrane in the water tank, collecting the sediment on the filter membrane, weighing to determine the anti-scouring performance of the sediment under the experiment condition, and completing the anti-scouring simulation experiment.
A simulation experiment system based on the pipeline sediment anti-scouring experiment device comprises a circulating water tank component and at least two groups of water tanks and pipeline reactors which are sequentially arranged from top to bottom, wherein a water delivery pipe of the circulating water tank component delivers water to the uppermost pipeline reactor, and a water return port of the circulating water tank component is communicated with a water return hole in the lowermost water tank through a water pipe; the water inlet of each pipeline reactor is an arc-shaped groove with an opening at the top, and the water outlet of each water tank is a flashboard formed on the side wall of the water tank; and the adjacent two groups of water tanks are connected with the pipeline reactor through the angle adjusting mechanism, and water flowing out of the water outlet port of the water tank above flows into the water inlet port of the pipeline reactor below under the action of gravity.
The experiment method based on the simulation experiment system comprises the following steps:
step 1: selecting a preset group number of water tanks to be assembled and fixed with the pipeline reactor, connecting a circulating water assembly, and putting sediments to be tested or cultured into the pipeline reactor (2);
step 2: turning on a water pump, adjusting the water flow speed, inputting water in the water tank main body into the uppermost pipeline reactor through a water delivery pipe and a water inlet, and enabling the water flow to flow through each pipeline reactor and a water tank to perform sediment simulation culture or an anti-scouring simulation experiment and then enter the water tank main body to perform a circulation process;
and step 3: after the operation is carried out for a preset time, the water pump is closed, and the sediment in the pipeline reactor (2) is sampled and analyzed to complete a sediment simulation culture experiment;
or taking out the filter membrane (7) in the water tank (1), collecting the deposit on the filter membrane (7), and weighing to determine the anti-scouring performance of the deposit under the experimental condition, thereby completing the anti-scouring simulation experiment. .
The utility model provides a closed pipeline deposit thing simulation experiment device, includes the basin, sets up through angle adjustment mechanism the pipeline reactor directly over the basin and with the circulating line that basin and pipeline reactor are linked together, wherein:
the pipeline reactor comprises a circular pipeline for accommodating sediments, sealing plates are arranged at two ends of the circular pipeline, a water inlet and a water outlet are formed in each sealing plate, and an independent water inlet and an independent air release pipe are arranged on each sealing plate;
the water tank is a sealed water tank, a water inlet port is formed in the side wall of the water tank, an aerator pipe is arranged in the water tank, a filter membrane for filtering water passing through the water inlet port and collecting filtered substances is arranged in the water tank, and the filter membrane is detachably assembled in the water tank;
the circulating pipeline comprises an internal circulating water pump arranged in the water tank, a water inlet pipe with one end connected to the internal circulating water pump and the other end connected with the water inlet, and a water outlet pipe communicated with the water outlet and the water inlet port.
In the technical scheme, one end of the aeration pipe is provided with aeration holes which are arranged in a combined way, and the other end of the aeration pipe is connected with a fan or a gas steel cylinder.
An experimental method based on the closed pipeline sediment simulation device comprises the following steps:
step A: putting the sediment to be tested or cultured into the pipeline reactor, and covering a sealing plate;
and B: opening a gas steel cylinder or a fan, introducing nitrogen, oxygen or air into the water tank through an aeration pipe, and opening a gas release pipe at the same time;
and C: after the aeration is finished, closing a gas steel cylinder or a fan, an independent water inlet and an air release pipe, opening an internal circulating water pump, and adjusting the water flow to enable circulating water to circularly flow between the water tank and the pipeline reactor;
step D: after the circulation flow is carried out for a preset time, the oxygen content in the circulation water is measured, an oxygen absorption curve is drawn, or a filter membrane in a water tank is taken out and weighed to determine the anti-scouring performance of the sediment under the anaerobic condition.
In the pipeline sediment simulation experiment device, the angle adjusting mechanism comprises two height adjusting parts which are symmetrically arranged, and each height adjusting part comprises a transverse plate which is arranged on the water tank and used for bearing the pipeline reactor and a height adjusting support rod which is arranged between the pipeline reactor and the transverse plate.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the traditional pipeline sediment experiment device, the pipeline sediment anti-scour experiment device has multiple functions, and can realize sediment simulation culture and anti-scour test through simple component assembly.
2. The simulation experiment system disclosed by the invention has the advantages of dense integration of parts, small occupied space, capability of simultaneously carrying out a plurality of parallel experiments or experiments with different flow rates and strong functions.
3. The closed pipeline sediment simulation device can realize various experimental operation functions, and is simple to operate and high in automation degree.
Drawings
Fig. 1 is a schematic structural diagram of the pipeline deposit antiscour experimental device in example 1.
Fig. 2 is a schematic structural view of a circulating water tank assembly in embodiment 1.
Fig. 3 is a schematic structural diagram of a simulation experiment system in example 2.
Fig. 4 is a schematic structural diagram of the closed pipeline deposit simulation device in embodiment 3.
In the figure: 1-water tank, 2-pipeline reactor, 3-water inlet, 4-water outlet, 5-water inlet, 6-water outlet, 7-filter membrane, 8-water tank body, 9-water pump, 10-water pipe, 11-water return, 12-first one-way valve, 13-sealing plate, 14-internal circulation water pump, 15-water inlet pipe, 16-water outlet pipe, 17-aeration pipe, 18-aeration hole, 19-transverse plate, 20-height adjusting knob, 21-water return, 22-independent water inlet, 23-air discharge pipe, 24-water distribution flower wall, 25-water return small water tank, 26-second one-way valve, 27-valve and 28-flowmeter.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The utility model provides a pipeline deposit antiscour experimental apparatus, includes basin 1 and sets up through angle adjustment mechanism pipeline reactor 2 directly over basin 1, wherein:
as shown in fig. 1, the pipe reactor 2 comprises a circular pipe for accommodating sediments, and a water inlet 3 and a water outlet 4 are respectively formed at two ends of the circular pipe;
the one end of basin 1 is equipped with water inlet port 5, and the other end is equipped with water outlet port 6, thereby water outlet port 6 is for setting up the adjustable flashboard that opens and shuts the size and adjust the exit velocity in basin 1 one end, be equipped with in the basin to passing through water inlet port 5's water filters and collects the filter membrane 7 of crossing the filter, filter membrane 7 passes through the assembly of recess pull detachable on the inner wall of basin 1 both sides and is in basin 1 and be located water outlet port 6's top, water inlet port 5 is located under delivery port 4 or through the pipeline with delivery port 4 is linked together.
As shown in fig. 2, the circulating water tank assembly includes a water tank main body 8, a water pump 9 disposed inside the water tank main body 8, a water pipe 10 connected to the water pump 9 and delivering water to the water inlet 3, and a water return port 11 disposed on a side wall of the bottom of the water tank main body 8, wherein the water return port 11 is communicated with a water return hole 21 disposed at one end of the water tank 1 through a water pipe.
During the experiment, put into pipeline reactor 2 with the deposit in, open water pump 9, pass through raceway 10 with the water in the water tank main part 8, through water inlet 3 to add water in pipeline reactor 2, water forms when circulating in pipeline reactor 2 and erodees the deposit, and the water that is mingled with silt passes through delivery port 4 and inlet port 5 and flows into in basin 1, filters through filter membrane 7, and silt remains on filter membrane 7, and water is discharged through inlet port 5, and the antiscour performance of deposit can be considered through the quality of calculating filter membrane 7 silt.
The angle adjusting mechanism comprises two height adjusting parts which are symmetrically arranged, and each height adjusting part comprises a transverse plate 19 which is arranged on the water tank 1 and used for bearing the pipeline reactor 2 and a height adjusting support rod 20 which is arranged between the pipeline reactor 2 and the transverse plate 19. The height adjusting support rod 20 comprises a support rod fixed on the upper pipeline reactor 2, another support rod fixed on the transverse plate 19 and a height adjusting knob connecting the two support rods. The height adjusting knob can adjust the relative position between the two support rods, thereby adjusting the height of the entire height adjusting support rod 20.
The inclination angle of the pipeline reactor 2 can be adjusted by adjusting the heights of the two height adjusting support rods 20 in the angle adjusting mechanism, so that the pipeline reactor 2 has different gradients, and the larger the gradient is, the larger the water flow speed is, and the smaller the gradient is, the smaller the water flow speed is. The flow rate of the water flow is adjusted by adjusting the angle adjusting mechanism, and the influence of the flow rate on the anti-scouring performance of the sediment is considered. And meanwhile, the inclination of the pipeline reactor 2 is adjusted, and the anti-scouring performance of sediments in pipelines with different gradients can be simulated.
Preferably, the water pipe 10 is provided with a valve 27 and a flowmeter 28 capable of adjusting the water flow, and the valve 27 can control the water flow of the water pipe 10 without turning off the water pump 9, so as to reduce the switching frequency of the water pump 9, increase the service life, and control the water flow. The first check valve 12 allows water to flow only from the water tub 1 into the tank main body 8.
Preferably, the openings at both ends of the circular pipeline are both fixed with a water distributing wall 24, and the water pipe is provided with a first one-way valve 12. The distributor wall 24 is a baffle provided with a plurality of small holes for reducing the flow rate of the water entering the pipe reactor 2, preventing the water from impinging on the sediment deposited in the pipe reactor 2.
Preferably, a small backwater tank 25 is arranged inside the tank body 8, and a second one-way valve 26 is arranged on the side wall of the small backwater tank 25 to make water in the small backwater tank 25 flow into the tank body 8 in one way. Inside the storing sewage that contains various pollutants of water tank main body 8, in order to practice thrift the space, water tank main body 8's height is higher, and the cross-sectional area is less, so the pressure of water tank main body 8 bottom is just bigger, and water tank main body 8 bottom water pressure is too big has been avoided in the joining of the little water tank 25 of return water, causes the problem that the water that the basin 1 of bottommost came out can't get back to in the water tank main body 8.
Example 2
A simulation experiment system based on the pipeline deposit anti-scouring experiment device in embodiment 1 comprises a circulating water tank assembly, at least two groups of water tanks 1 and pipeline reactors 2 which are vertically arranged and connected through an angle adjusting mechanism, wherein a water delivery pipe 10 of the circulating water tank assembly delivers water to the uppermost pipeline reactor 2, and a water return port 11 of the circulating water tank assembly is communicated with a water return hole 21 on the lowermost water tank 1 through a water pipe; the water inlet 3 of each pipeline reactor 2 is an arc-shaped groove with an opening at the top, the water outlet 6 of each water tank 1 is a flashboard formed on the side wall of the water tank, and the water flow speed can be controlled by controlling the opening and closing of the flashboard; two adjacent water tanks 1 and pipeline reactors 2 connected through an angle adjusting mechanism, wherein water flowing out of a water outlet port 6 of the water tank 1 above flows into a water inlet 3 of the pipeline reactor 2 below under the action of gravity.
In the above simulation experiment system, an appropriate number of the water tanks 1 and the pipeline reactors 2 may be selected for assembly according to actual experiment requirements. During assembly, the positions of the water outlets, the water inlets, the water inlet ports and the water outlet ports are connected with each other by attention, so that water flow is prevented from flowing out of the system. In order to ensure the stability of the water flow flowing out from the water pipe 10, a separate water tank 1 may be added at the top, the water pipe injects water into the water tank 1, and then flows out from the gate plate at the other end into the pipeline reactor 2, as shown in fig. 3.
An experimental method for carrying out a simulation culture experiment by using the simulation experiment system comprises the following steps:
step 1: selecting a proper number of water tanks 1 connected through an angle adjusting mechanism to be assembled and fixed with a pipeline reactor 2, placing the water tanks on a welded steel frame, connecting a circulating water assembly, and placing sediments to be cultured into the pipeline reactor 2, wherein a filter membrane 7 does not need to be installed in the water tanks 1;
step 2: adding nutrient solution required by culture into the water tank main body 8, turning on the water pump 9, adjusting the water flow speed through the valve 27 and the inclination angle of the pipeline reactor 2, inputting water in the water tank main body 8 into the pipeline reactor 2 positioned at the top through the water delivery pipe 10 and the water inlet 3, and performing sediment simulation culture on the water flow flowing through each pipeline reactor 2 and the water tank 1 to enter the water tank main body 8 for a circulation process;
and step 3: and after the operation is carried out for a period of time, the water pump 9 is closed, and the sediment simulation culture is completed.
In this experiment, adjust the inclination of pipeline reactor 2, make pipeline reactor 2 have less slope for rivers slowly flow through the deposit, reduce rivers and to the washing away of deposit. The simulation experiment system can be used for culturing different sediments under the same environment and water flow speed, and simultaneously carrying out multiple groups of parallel experiments.
An experiment method for performing anti-scouring performance detection by using the simulation experiment system comprises the following steps:
step 1: selecting a proper number of water tanks 1 connected through an angle adjusting mechanism to be assembled and fixed with a pipeline reactor 2, connecting a circulating water assembly, and placing the sediment to be tested into the pipeline reactor 2, wherein a filter membrane 7 is arranged in each water tank 1;
step 2: the water pump 9 is opened, the water flow speed is adjusted through the valve 27 and the inclination angle of the pipeline reactor 2, water in the water tank main body 8 is input into the pipeline reactor 2 positioned at the top through the water delivery pipe 10 and the water inlet 3, the water flow flows through each pipeline reactor 2 and the water tank 1 to carry out a sediment anti-scouring simulation experiment and then enters the water tank main body 8 to carry out a circulation process, in the circulation process, the sediment is scoured through the water flow of the pipeline reactor 2, scoured and scattered sediment enters the water tank 1 below along with the water flow, and the sediment is filtered by the filter membrane 7 and filtered to collect filtrate;
and step 3: after running for a period of time, the water pump 9 is turned off, and the filter membrane 7 in each tank 1 is taken out and weighed to determine the anti-scouring performance of the sediment under the experimental conditions.
The erosion resistance test of the sediment is mainly used for detecting the amount of the sediment drifting under the condition of water flow scouring. In the sediment scour resistance test, the removable filter membranes 7 which are weighed in advance are fixed on the inner walls of the two sides of the water tank 1, and the sediment which is scattered along with the water flow is collected. After the test is finished, the removable filter membrane 7 is drawn out and weighed, and the weight difference of the two weighing processes is the drift amount of the sediment in the sediment scour resistance test.
The simulation experiment system can be used for detecting the anti-scouring performance of different sediments under the same environment and water flow speed, and simultaneously carrying out multiple groups of parallel experiments. The different water flow speeds can be generated in one set of simulation experiment system by adjusting the inclination angles of the angle adjusting mechanisms or adjusting the opening and closing angles of the flashboards of the water outlet ports 6, and the influence of the different water flow speeds on the anti-scouring performance of the sediment can be detected.
Example 3
A closed pipeline deposit simulation apparatus, as shown in fig. 4, comprising a water tank 1, a pipeline reactor 2 disposed directly above the water tank 1 through an angle adjustment mechanism, and a circulation pipeline communicating the water tank 1 and the pipeline reactor 2, wherein: the pipeline reactor 2 comprises a circular pipeline for accommodating sediments, sealing plates 13 are arranged at two ends of the circular pipeline, a water inlet 3 and a water outlet 4 are formed on the sealing plates respectively, and an independent water inlet 22 and an independent air release pipe 23 are also arranged on the sealing plates 13; the water tank 1 is a sealed water tank, a water inlet port 5 is arranged on the side wall of the water tank, an aeration pipe 17 is arranged in the water tank 1, a filter membrane 7 for filtering water passing through the water inlet port 5 and collecting filtered substances is arranged in the water tank 1, and the filter membrane 7 is detachably assembled in the water tank 1; the circulating pipeline comprises an internal circulating water pump 14 placed in the water tank 1, a water inlet pipe 15 communicated with the internal circulating water pump 14 and passing through the water outlet port 6 and the water inlet 3, and a water outlet pipe 16 communicated with the water outlet 4 and the water inlet port 5.
Preferably, the angle adjusting mechanism comprises two height adjusting parts symmetrically arranged, and each height adjusting part comprises a transverse plate 19 arranged on the water tank 1 and used for bearing the pipeline reactor 2 and a height adjusting support rod 20 arranged between the pipeline reactor 2 and the transverse plate 19. The height adjusting support rod 20 comprises a support rod fixed on the upper pipeline reactor 2, another support rod fixed on the transverse plate 19 and a height adjusting knob connecting the two support rods. The height adjusting knob can adjust the relative position between the two support rods, thereby adjusting the height of the entire height adjusting support rod 20.
The inclination angle of the pipeline reactor 2 can be adjusted by adjusting the heights of the two height adjusting support rods 20 in the angle adjusting mechanism, so that the pipeline reactor 2 has different gradients, and the larger the gradient is, the larger the water flow speed is, and the smaller the gradient is, the smaller the water flow speed is. The flow rate of the water flow is adjusted by adjusting the angle adjusting mechanism, and the influence of the flow rate on the sediment is considered.
Preferably, the aeration pipe 17 has aeration holes 18 arranged in combination at one end thereof, and a blower or a gas cylinder connected to the other end thereof.
The use method for measuring the oxygen absorption rate of the sediment based on the closed pipeline sediment simulation device comprises the following steps:
step A: putting the sediment to be tested into the pipeline reactor 2, and covering a closing plate 13;
and B: through said separate water inlet 22 a water stream containing specific nutrients required for the growth of the sediment is injected into the device. Opening an oxygen steel cylinder or a fan, introducing oxygen or air into the water tank 1 through the aeration pipe 17, and simultaneously opening an air release pipe 23;
and C: after aeration is carried out for 10-30min, the oxygen concentration in the circulating water reaches saturation, an oxygen steel cylinder or a fan, an independent water inlet 22 and an air release pipe 23 are closed, an internal circulating water pump 14 is opened, and the water flow is adjusted through the inclination angle of an angle adjusting mechanism, so that the circulating water circularly flows between the water tank 1 and the pipeline reactor 2;
step D: after the circulation flow is carried out for a certain time, the oxygen content in the circulation water is measured at intervals, and an oxygen absorption curve is drawn.
In this experiment, angle of inclination adjustment mechanism's inclination makes pipeline reactor 2 have less slope for rivers slowly flow through the deposit, reduce rivers and to the washing away of deposit.
An experiment method for carrying out an experiment on the influence of scouring resistance of different sediments under anaerobic conditions based on the closed pipeline sediment simulation device comprises the following steps:
step A: putting the sediment to be tested into the pipeline reactor 2, covering a closing plate 13, and installing the filter membrane 7 in the water tank 1;
and B: opening a nitrogen steel cylinder, introducing nitrogen into the water tank 1 through the aeration pipe 17, and simultaneously opening an air release pipe 23 to remove oxygen in the device;
and C: after aeration is carried out for 10-30min, the gas steel cylinder, the independent water inlet 22 and the air release pipe 23 are closed, the internal circulating water pump 14 is opened, and the water flow is adjusted through the inclination angle of the angle adjusting mechanism, so that circulating water circularly flows between the water tank 1 and the pipeline reactor 2;
step D: after a certain time of circulation, the filter membrane 7 in the tank 1 is taken out and weighed to determine the anti-scouring properties of the sediment under the conditions of the experiment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a pipeline deposit simulation experiment device which characterized in that, includes basin (1), sets up through angle adjustment mechanism pipeline reactor (2) and the circulating water tank subassembly of basin (1) top, wherein:
the pipeline reactor (2) comprises a circular pipeline for accommodating sediments, and a water inlet (3) and a water outlet (4) are formed at two ends of the circular pipeline respectively;
one end of the water tank (1) is provided with a water inlet port (5), the other end of the water tank is provided with a water outlet port (6), a filter membrane (7) for filtering water passing through the water inlet port (5) and collecting filtered substances is arranged in the water tank, the filter membrane (7) is detachably assembled in the water tank (1), and the water inlet port (5) is positioned below the water outlet (4) so that the water flows into the water inlet port (5) automatically, or the water inlet port (5) is communicated with the water outlet (4) through a pipeline;
the circulating water tank assembly comprises a water tank body (8), a water pump (9) arranged in the water tank body (8), a water delivery pipe (10) connected with the water pump (9) and used for delivering water to the water inlet (3), and a water return port (11) arranged on the side wall of the bottom of the water tank body (8), wherein the water return port (11) is communicated with a water return hole (21) formed in one end of the water tank (1) through a water pipe.
2. The pipeline deposit simulation experiment device as claimed in claim 1, wherein the water pipe (10) is provided with a valve (27) and a flowmeter (28), and the water pipe is provided with a first one-way valve (12).
3. The pipeline deposit simulation experiment device of claim 1, wherein a water distributing wall (24) is fixed at both openings of the circular pipeline.
4. The pipeline deposit simulation experiment device as claimed in claim 1, wherein a small backwater tank (25) is arranged inside the tank main body (8), and a second one-way valve (26) is arranged on the side wall of the small backwater tank (25) so as to enable water in the small backwater tank (25) to flow into the tank main body (8) in a one-way manner.
5. A simulation experiment system based on the pipeline deposit antiscour experimental device as claimed in claim 1, characterized by comprising a circulating water tank assembly and at least two sets of the water tank (1) and the pipeline reactor (2) which are sequentially arranged, wherein a water delivery pipe (10) of the circulating water tank assembly delivers water to the uppermost pipeline reactor (2), and a water return port (11) of the circulating water tank assembly is communicated with a water return hole (21) on the lowermost water tank (1) through a water pipe; the water inlet (3) of each pipeline reactor (2) is an arc-shaped groove with an open top, and the water outlet port (6) of each water tank (1) is a flashboard formed on the side wall of the water tank; the water outlet of the water outlet port (6) of the water tank (1) positioned above flows into the water inlet (3) of the pipeline reactor (2) positioned below under the action of gravity.
6. The simulation method of the pipeline deposit simulation experiment device as claimed in claim 1, comprising the steps of:
step 1: placing the sediment to be tested or cultured into the pipeline reactor (2);
step 2: the water pump (9) is turned on to adjust the water flow speed, water in the water tank main body (8) enters the pipeline reactor (2) through the water delivery pipe (10) and the water inlet (3), the water flow flows through the pipeline reactor (2) and then enters the water tank (1) through the water outlet (4), the filter membrane (7) filters the flowing water in the water tank (1), and then the water flows back to the water tank main body (8) through the water return hole (21) to be circulated
And step 3: after the operation is carried out for a preset time, the water pump (9) is closed, and the sediment in the pipeline reactor (2) is sampled and analyzed to complete a sediment simulation culture experiment;
or taking out the filter membrane (7) in the water tank (1), collecting the deposit on the filter membrane (7), and weighing to determine the anti-scouring performance of the deposit under the experimental condition, thereby completing the anti-scouring simulation experiment.
7. The utility model provides a closed pipeline deposit thing simulation experiment device which characterized in that, includes basin (1), sets up through angle adjustment mechanism pipeline reactor (2) directly over basin (1) and with the circulating line that basin (1) and pipeline reactor (2) are linked together, wherein:
the pipeline reactor (2) comprises a circular pipeline for containing sediments, sealing plates (13) are arranged at two ends of the circular pipeline, a water inlet (3) and a water outlet (4) are formed on the sealing plates respectively, and an independent water inlet (22) and an independent air release pipe (23) are arranged on the sealing plates (13);
the water tank (1) is a sealed water tank, a water inlet port (5) is formed in the side wall of the water tank, an aerator pipe (17) is arranged in the water tank (1), a filter membrane (7) for filtering water passing through the water inlet port (5) and collecting filtered substances is arranged in the water tank (1), and the filter membrane (7) is detachably assembled in the water tank (1);
the circulating pipeline comprises an internal circulating water pump (14) arranged in the water tank (1), a water inlet pipe (15) with one end connected to the internal circulating water pump (14) and the other end connected with the water inlet (3), and a water outlet pipe (16) communicated with the water outlet (4) and the water inlet port (5).
8. The closed pipeline deposit simulation experiment device as claimed in claim 7, wherein one end of the aeration pipe (17) is provided with aeration holes (18) which are arranged in combination, and the other end is connected with a fan or a gas steel cylinder.
9. The experimental method of the closed pipeline deposit sediment simulation experimental device as claimed in claim 7, characterized by comprising the following steps:
step A: putting the sediment to be tested or cultured into the pipeline reactor (2), and covering a closing plate (13);
and B: introducing nitrogen, oxygen or air into the water tank (1) through the aeration pipe (17), and opening the air release pipe (23);
and C: after the aeration is finished, closing the air source, the independent water inlet (22) and the air release pipe (23), opening the internal circulating water pump (14), and adjusting the water flow to enable circulating water to circularly flow between the water tank (1) and the pipeline reactor (2);
step D: after the circulation flow is carried out for a preset time, the oxygen content in the circulation water is measured, an oxygen absorption curve is drawn, or a filter membrane (7) in the water tank (1) is taken out and weighed so as to determine the anti-scouring performance of the sediment under the anaerobic condition.
10. The pipeline deposit simulation experiment device according to claim 1 or 7, wherein the angle adjustment mechanism comprises two height adjustment parts which are symmetrically arranged, and the height adjustment parts comprise a transverse plate (19) which is arranged on the water tank (1) and used for bearing the pipeline reactor (2) and a height adjustment support rod (20) which is arranged between the pipeline reactor (2) and the transverse plate (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910600656.XA CN112179729B (en) | 2019-07-04 | Pipeline sediment simulation experiment device, experiment system and experiment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600656.XA CN112179729B (en) | 2019-07-04 | Pipeline sediment simulation experiment device, experiment system and experiment method |
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| Publication Number | Publication Date |
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| CN112179729A true CN112179729A (en) | 2021-01-05 |
| CN112179729B CN112179729B (en) | 2024-05-14 |
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