CN108469334A - It is a kind of to simulate the experimental provision and experimental method that pipeline is streamed and its washed away - Google Patents
It is a kind of to simulate the experimental provision and experimental method that pipeline is streamed and its washed away Download PDFInfo
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- 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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Abstract
The invention discloses a kind of experimental provision that simulation pipeline is streamed and its washed away and experimental methods.The experimental provision that the simulation pipeline is streamed and its washed away, including river model, circulation mechanism, pipeline mechanism, sampling mechanism.The experimental provision that simulation pipeline provided by the invention is streamed and its washed away, it can be according to requirement of experiment, different riverbed media is selected to simulate different riverbed types, the paving mode for changing pipeline, adjust control of the power realization of water pump to flow, by changing three kinds of governing factors of model, research simulation pipeline streams and its scour law.Entire experimental provision is a closed system reduces the water consumption of experiment under the premise of meeting experiment effect, so that experiment is implemented more environmentally friendly.
Description
Technical field
The present invention relates to the technical field of pipeline damaged or destroyed by flood model experiment, what especially a kind of simulation pipeline was streamed and its washed away
Experimental provision and experimental method.
Background technology
With the fast development of domestic pipeline engineering, the mileage number of various pipes all increases rapidly, such as feedwater piping, row
Waterpipe, gas pipeline, heat distribution pipeline, long-distance oil ＆ gas pipeline etc..Various pipeline distributions are wide at present, and geological conditions is multiple along the line
It is miscellaneous, some geological disasters inevitably occur, influence the safe operation of pipeline.
The harm getting worse that geological disaster runs pipe safety accounts for about the 12%- of accident rate during runing according to statistics
20%, and the geological disaster caused by " water " is developed very generally along pipeline.
For the harm that further investigation geological disaster runs pipe safety, domestic colleges and universities and enterprise establish multiple geology calamities
Evil simulation experiment platform, the landslide disaster simulation system for technical college of such as taking precautions against natural calamities, the oil-gas pipeline landslide mould of Chengdu University of Technology
Draft experiment platform, the landslide simulation experimental platform of East China Institute of Technology, petrochina pipeline Science ＆ Technology Center oil-gas pipeline goaf
Simulation experiment platform.Above-mentioned geological disaster experiment porch plays certain impetus to research pipeline geological disaster, but at present
It there is no pipeline damaged or destroyed by flood simulation experiment platform.Based on the above situation, there is an urgent need for establish a kind of experiment that simulation pipeline is streamed and its washed away
Device and experimental method.
Invention content
It is an object of the invention to propose a kind of simulation pipeline experimental provision that streams and its wash away and experimental method, pass through
Riverbed medium, pipeline paving mode, water flow these three factors are controlled, simulate river streaming in crossing pipeline and its to pipe
The souring of road lower part riverbed medium.To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of experimental provision that simulation pipeline is streamed and its washed away, including：River model, circulation mechanism, pipeline mechanism, sight
Survey mechanism.
River model：Including four sections of U-type grooves, first segment strip U-type groove is connected by welding and second segment semicircle U-type groove
It connects, second segment semicircle U-type groove is connect by welding with third segment length's bar shaped U-type groove, and third segment length's bar shaped U-type groove passes through welding
It is connect with the 4th section of semicircle U-type groove；
Circulation mechanism：Including water feeding tank, water tank, water pump, water-supply-pipe, the water feeding tank is by welding and river model
First segment U-type groove port connects, and the water tank is connect by welding with the 4th section of U-type groove port of river model, the water
Pump is placed on the bottom of storage tank, and described water-supply-pipe one end is connect with Water pump head, and the other end stretches into water feeding tank；
Pipeline mechanism：Including pipeline jig, pipeline, the pipeline jig is a U-type groove, is hung upside down in river model U-type groove
Cell wall on, each one of left and right forms a pair of of fixture, and pipeline jig can move freely on the cell wall of river model U-type groove, U
A bolt is inserted into the side of type groove, is used for position of the fixed -piping fixture on river model, the other side welding one of U-type groove
Pipeline can be inserted into, fixed -piping by a annulus；
Sampling mechanism：Including high-speed camera, the high-speed camera is fixed by the bracket right over the pipeline at 1m, mirror
Head face pipeline.
Preferably, a length of 3m of the river model first segment strip U-type groove, groove width 0.5m, the high 0.3m of cell wall, with level
15 ° of angle；Second segment semicircle U-type groove internal diameter 2m, outer diameter 3m, groove width 0.5m, the high 0.3m of cell wall are horizontally arranged；Third segment length
Bar shaped U-type groove a length of 3m, groove width 0.5m, the high 0.3m of cell wall, with 15 ° of horizontal sextant angle；4th section of semicircle U-type groove internal diameter 2m, outside
Diameter 3m, groove width 0.5m, the high 0.3m of cell wall are horizontally arranged.
Preferably, the water tank is the cuboid irony water tank of 2m × 2m × 0.5m, passes through welding and river model the
Four sections of U-type groove port connections, water tank upper surface is completely open, the one side being connect with the 4th section of U-type groove port, upper half plane opening
Lower half face closure is equipped with variable frequency pump in the bottom of storage tank.
Preferably, the water feeding tank is the cuboid irony water tank of 2m × 2m × 0.5m, and water feeding tank upper surface is completely open,
The one side being connect with river model first segment U-type groove port, upper half plane opening lower half face closure.
Preferably, the pipeline jig is the U-type groove of a 2cm long, and groove width 1cm, the high 5cm in both sides are opened in the side of U-type groove
Hole, is inserted into a bolt, and the annulus of a diameter 10cm is welded in the other side of U-type groove.
Preferably, the water-supply-pipe be internal diameter 25mm, outer diameter 32mm raw rubber water pipe, length 2.5m, water pipe one end with
Water pump head connects, and the other end stretches into water feeding tank.
Preferably, for the river model first segment U-type groove with circulation mechanism water feeding tank by being welded to connect, the 4th section U-shaped
Slot, by being welded to connect, is connected between water tank and water feeding tank by water-supply-pipe with circulation mechanism water tank, entire experimental provision
For a closed system, water is added in experimental provision, opens water pump, flow can form interior cycle in experimental provision.
The invention also provides a kind of experimental provision experimental methods that simulation pipeline is streamed and its washed away, using above-mentioned dress
It sets comprising following experimental procedure：
A, the riverbed type simulated needed for selection, and the corresponding riverbed homogeneous media of different riverbed types is layed in riverbed
On model；
(1) the riverbed medium in basement rock riverbed, basement rock riverbed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is the boulder bed of 1-2cm；
2. the grain size of 5cm thickness is the boulder bed of 2-3cm；
3. the grain size of 5cm thickness is the boulder bed of 3-5cm；
(2) the riverbed medium of basement rock-impingement mix horseshoe bend, basement rock-impingement mix horseshoe bend is divided into three layers from top to bottom,
It is followed successively by：
1. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
2. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
3. the grain size of 5cm thickness is the boulder bed of 1-2cm；
(3) the riverbed medium of alluvial river bed, alluvial river bed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is less than the fine sand layer of 1mm；
2. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
3. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
B, the pipeline paving mode simulated needed for selection；
(1) pipeline is vertical with river, intercepts an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 49cm, and pipeline is inserted
Enter in the annulus of pipeline jig, position of the movement pipeline fixture on river model, it is 90 ° to make pipeline and riverbed angle, is tightened
Bolt on pipeline jig, makes pipeline jig be fixed on river model；
(2) 60 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 57cm, will be managed
Road is inserted into the annulus of pipeline jig, position of the movement pipeline fixture on river model, and it is 60 ° to make pipeline and riverbed angle,
The bolt on pipeline jig is tightened, pipeline jig is made to be fixed on river model；
(3) 45 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 70cm, will be managed
Road is inserted into the annulus of pipeline jig, position of the movement pipeline fixture on river model, and it is 45 ° to make pipeline and riverbed angle.
The bolt on pipeline jig is tightened, pipeline jig is made to be fixed on river model；
C, it is separately added into 1/2 water in water tank and water feeding tank, opens water pump, water is flowed by water-supply-pipe from water tank
Enter in water feeding tank, waits for that the water in water feeding tank overflows naturally and flow into river model, by adjusting the power of water pump, realize to flow
It adjusts；
| Pump power | 50W | 60W | 70W | 80W | 90W | 100W |
| Pump capacity | 6000L/H | 7000L/H | 8000L/H | 9000L/H | 10000L/H | 12000L/H |
D, after entire water circulation is got up, start high-speed camera, by high-speed camera to pipeline and pipeline lower part river
Bed medium carries out automatic camera record, and entire experiment carries out eight hours, then one group of experiment terminates；
E, change riverbed medium, pipeline paving mode, water flow these three factors and start next group of experiment, repeat step a-
d。
Use the present invention, thus it is possible to vary riverbed medium simulates basement rock riverbed, basement rock-impingement mix horseshoe bend, alluvial river bed；
Change the paving mode of pipeline as needed；Power by adjusting water pump realizes the control to flow.Entirely experimental provision is
One closed system reduces the water consumption of experiment under the premise of meeting experiment effect, so that experiment is implemented more environmentally friendly.
Description of the drawings
Fig. 1 is the river model schematic diagram of the present invention；
Fig. 2 is the circulation mechanism schematic diagram of the present invention；
Fig. 3 is the pipeline mechanism schematic diagram of the present invention；
Fig. 4 is the sampling mechanism schematic diagram of the present invention；
Fig. 5 is the overall package design sketch of the present invention.
In figure：1- river model first segment strips U-type groove, 2- river model second segment semicircles U-type groove, the riverbeds 3- mould
Type third segment length's bar shaped U-type groove, the semicircle U-type groove of the 4th section of 4- river models, 5- water feeding tanks, 6- water-supply-pipes, 7- water pumps, 8- storages
Water tank, 9- bolts, 10- pipeline jigs U-type groove, 11- annulus, 12- pipelines, 13- high-speed cameras, 14- holders.
Specific implementation mode
In conjunction with Fig. 1 and Fig. 5, in river model, the river model includes four sections of U-type grooves, first segment strip U-type groove 1
It is connect with second segment semicircle U-type groove 2 by welding, second segment semicircle U-type groove 2 is U-shaped with third segment length's bar shaped by welding
Slot 3 connects, and third segment length's bar shaped U-type groove 3 is connect by welding with the 4th section of semicircle U-type groove 4.The river model first segment
Strip U-type groove 1 a length of 3m, groove width 0.5m, the high 0.3m of cell wall, with 15 ° of horizontal sextant angle；2 internal diameter of second segment semicircle U-type groove
2m, outer diameter 3m, groove width 0.5m, the high 0.3m of cell wall are horizontally arranged；Third segment length's bar shaped U-type groove 3 a length of 3m, groove width 0.5m, cell wall
High 0.3m, with 15 ° of horizontal sextant angle；4th section of semicircle U-type groove 4 internal diameter 2m, outer diameter 3m, groove width 0.5m, the high 0.3m of cell wall are horizontal
It places.
In conjunction with Fig. 2 and Fig. 5, in circulation mechanism, the water feeding tank 5 is the cuboid irony water tank of 2m × 2m × 0.5m, is supplied
5 upper surface of water tank is completely open, the one side being connect with 1 port of river model first segment U-type groove, the lower demifacet envelope of upper half plane opening
It closes.The water tank 8 is the cuboid irony water tank of 2m × 2m × 0.5m, and 8 upper surface of water tank is completely open, with river model
The one side of 4th section of 4 port of U-type groove connection, upper half plane opening lower half face closure are equipped with water pump 7 in 8 bottom of water tank.It is described defeated
Water pipe 6 is the raw rubber water pipe of internal diameter 25mm, outer diameter 32mm, and length 2.5m, water pipe one end connect with 7 pump head of water pump, the other end
It stretches into water feeding tank 5.
In conjunction with Fig. 3 and Fig. 5, in pipeline mechanism, the pipeline jig is the U-type groove 10 of 2cm long, groove width 1cm, both sides height
5cm.In a side opening of U-type groove, it is inserted into a bolt 9, the annulus 11 of a diameter 10cm is welded in the other side of U-type groove, can be with
Pipeline 12 is inserted into, fixed -piping.
In conjunction with Fig. 4 and Fig. 5, in sampling mechanism, the high-speed camera 13 is fixed on by holder 14 right over pipeline 12
At 1m, camera lens face pipeline.
In conjunction with shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a kind of experimental provision experiment side that simulation pipeline is streamed and its washed away
Method, step approximately as：
A, the riverbed type simulated needed for selection, and the corresponding riverbed homogeneous media of different riverbed types is layed in riverbed
On model；
(1) the riverbed medium in basement rock riverbed, basement rock riverbed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is the boulder bed of 1-2cm；
2. the grain size of 5cm thickness is the boulder bed of 2-3cm；
3. the grain size of 5cm thickness is the boulder bed of 3-5cm；
(2) the riverbed medium of basement rock-impingement mix horseshoe bend, basement rock-impingement mix horseshoe bend is divided into three layers from top to bottom,
It is followed successively by：
1. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
2. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
3. the grain size of 5cm thickness is the boulder bed of 1-2cm；
(3) the riverbed medium of alluvial river bed, alluvial river bed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is less than the fine sand layer of 1mm；
2. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
3. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
B, the pipeline paving mode simulated needed for selection；
(1) pipeline is vertical with river, intercepts an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 49cm, and pipeline is inserted
Enter in the annulus of pipeline jig, position of the movement pipeline fixture on river model, it is 90 ° to make pipeline and riverbed angle, is tightened
Bolt on pipeline jig, makes pipeline jig be fixed on river model；
(2) 60 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 57cm, will be managed
Road is inserted into the annulus of pipeline jig, position of the movement pipeline fixture on river model, and it is 60 ° to make pipeline and riverbed angle,
The bolt on pipeline jig is tightened, pipeline jig is made to be fixed on river model；
(3) 45 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 70cm, will be managed
Road is inserted into the annulus of pipeline jig, position of the movement pipeline fixture on river model, and it is 45 ° to make pipeline and riverbed angle.
The bolt on pipeline jig is tightened, pipeline jig is made to be fixed on river model；
C, it is separately added into 1/2 water in water tank and water feeding tank, opens water pump, water is flowed by water-supply-pipe from water tank
Enter in water feeding tank, waits for that the water in water feeding tank overflows naturally and flow into river model, by adjusting the power of water pump, realize to flow
It adjusts；
| Pump power | 50W | 60W | 70W | 80W | 90W | 100W |
| Pump capacity | 6000L/H | 7000L/H | 8000L/H | 9000L/H | 10000L/H | 12000L/H |
D, after entire water circulation is got up, start high-speed camera, by high-speed camera to pipeline and pipeline lower part river
Bed medium carries out automatic camera record, and entire experiment carries out eight hours, then one group of experiment terminates；
E, change riverbed medium, pipeline paving mode, water flow these three factors and start next group of experiment, repeat step a-
d。
Finally it should be noted that：The preferable embodiment of the present invention is illustrated above, is familiar with the technology of this field
All equivalent replacements or deformation that personnel make on the basis of the present invention, are all contained in model defined by the application claim
In enclosing.
Claims (8)
1. a kind of experimental provision that simulation pipeline is streamed and its washed away, it is characterised in that：The simulation pipeline is streamed and its is washed away
Experimental provision include four parts：River model, circulation mechanism, pipeline mechanism, sampling mechanism；
River model：Including four sections of U-type grooves, first segment strip U-type groove is connect by welding with second segment semicircle U-type groove,
Second segment semicircle U-type groove connect by welding with third segment length's bar shaped U-type groove, third segment length's bar shaped U-type groove by welding and
4th section of semicircle U-type groove connection；
Circulation mechanism：Including water feeding tank, water tank, water pump, water-supply-pipe, the water feeding tank is by welding first with river model
The connection of section U-type groove port, the water tank are connect by welding with the 4th section of U-type groove port of river model, and the water pump is put
It sets in the bottom of storage tank, described water-supply-pipe one end is connect with Water pump head, and the other end stretches into water feeding tank；
Pipeline mechanism：Including pipeline jig, pipeline, the pipeline jig is a U-type groove, hangs upside down the slot in river model U-type groove
On wall, each one of left and right forms a pair of of fixture, and pipeline jig can move freely on the cell wall of river model U-type groove, U-type groove
Side be inserted into a bolt, be used for position of the fixed -piping fixture on river model, a circle is welded in the other side of U-type groove
Pipeline can be inserted into, fixed -piping by ring；
Sampling mechanism：Including high-speed camera, the high-speed camera is fixed by the bracket right over the pipeline at 1m, and camera lens is just
To pipeline.
2. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The riverbed mould
Type first segment strip U-type groove a length of 3m, groove width 0.5m, the high 0.3m of cell wall, with 15 ° of horizontal sextant angle；Second segment semicircle U-type groove
Internal diameter 2m, outer diameter 3m, groove width 0.5m, the high 0.3m of cell wall are horizontally arranged；Third segment length's bar shaped U-type groove a length of 3m, groove width 0.5m,
The high 0.3m of cell wall, with 15 ° of horizontal sextant angle；4th section of semicircle U-type groove internal diameter 2m, outer diameter 3m, groove width 0.5m, the high 0.3m of cell wall,
It is horizontal positioned.
3. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The water tank
For the cuboid irony water tank of 2m × 2m × 0.5m, it is connect with the 4th section of U-type groove port of river model by welding, on water tank
Surface is completely open, the one side being connect with the 4th section of U-type groove port, and upper half plane opening lower half face closure is filled in the bottom of storage tank
There is variable frequency pump.
4. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The water feeding tank
For the cuboid irony water tank of 2m × 2m × 0.5m, water feeding tank upper surface is completely open, with river model first segment U-type groove port
The one side of connection, upper half plane opening lower half face closure.
5. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The pipeline folder
Tool is the U-type groove of 2cm long, groove width 1cm, the high 5cm in both sides, in a side opening of U-type groove, one bolt of insertion, U-type groove it is another
Weld the annulus of a diameter 10cm in side.
6. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The water-supply-pipe
For the raw rubber water pipe of internal diameter 25mm, outer diameter 32mm, length 2.5m, water pipe one end is connect with Water pump head, and the other end stretches into confession
In water tank.
7. the experimental provision that simulation pipeline according to claim 1 is streamed and its washed away, it is characterised in that：The riverbed mould
For type first segment U-type groove with circulation mechanism water feeding tank by being welded to connect, the 4th section of U-type groove passes through welding with circulation mechanism water tank
Connection, is connected between water tank and water feeding tank by water-supply-pipe, and entire experimental provision is a closed system, in experimental provision
Water is added, opens water pump, flow can form interior cycle in experimental provision.
8. a kind of simulation pipeline experimental provision experimental method for streaming and its washing away, which is characterized in that using as claim 1 to
The experimental provision that 7 any one of them simulation pipeline is streamed and its washed away, includes the following steps：
A, the riverbed type simulated needed for selection, and the corresponding riverbed homogeneous media of different riverbed types is layed in river model
On；
(1) the riverbed medium in basement rock riverbed, basement rock riverbed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is the boulder bed of 1-2cm；
2. the grain size of 5cm thickness is the boulder bed of 2-3cm；
3. the grain size of 5cm thickness is the boulder bed of 3-5cm；
(2) the riverbed medium of basement rock-impingement mix horseshoe bend, basement rock-impingement mix horseshoe bend is divided into three layers from top to bottom, successively
For：
1. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
2. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
3. the grain size of 5cm thickness is the boulder bed of 1-2cm；
(3) the riverbed medium of alluvial river bed, alluvial river bed is divided into three layers from top to bottom, is followed successively by：
1. the grain size of 5cm thickness is less than the fine sand layer of 1mm；
2. the grain size of 5cm thickness is the fine sand layer of 1-2mm；
3. the grain size of 5cm thickness is the coarse sands layer of 2-3mm；
B, the pipeline paving mode simulated needed for selection；
(1) pipeline is vertical with river, intercepts an internal diameter 8cm, outer diameter 9cm, length is the iron pipe of 49cm, by pipeline insertion tube
In the annulus of road fixture, position of the movement pipeline fixture on river model, it is 90 ° to make pipeline and riverbed angle, tightens pipeline
Bolt on fixture, makes pipeline jig be fixed on river model；
(2) 60 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 57cm, and pipeline is inserted
Enter in the annulus of pipeline jig, position of the movement pipeline fixture on river model, it is 60 ° to make pipeline and riverbed angle, is tightened
Bolt on pipeline jig, makes pipeline jig be fixed on river model；
(3) 45 ° of pipeline and river angle intercept an internal diameter 8cm, outer diameter 9cm, and length is the iron pipe of 70cm, and pipeline is inserted
Enter in the annulus of pipeline jig, position of the movement pipeline fixture on river model, it is 45 ° to make pipeline and riverbed angle.It tightens
Bolt on pipeline jig, makes pipeline jig be fixed on river model；
C, it is separately added into 1/2 water in water tank and water feeding tank, opens water pump, water flows into confession by water-supply-pipe from water tank
In water tank, waits for that the water in water feeding tank overflows naturally and flow into river model, by adjusting the power of water pump, realize the tune to flow
Section；
D, after entire water circulation is got up, start high-speed camera, be situated between to pipeline and pipeline lower part riverbed by high-speed camera
Matter carries out automatic camera record, and entire experiment carries out eight hours, then one group of experiment terminates；
E, change riverbed medium, pipeline paving mode, water flow these three factors and start next group of experiment, repeat step a-d.
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