CN208968591U - A kind of assembled local head loss experimental provision - Google Patents
A kind of assembled local head loss experimental provision Download PDFInfo
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- CN208968591U CN208968591U CN201821918358.2U CN201821918358U CN208968591U CN 208968591 U CN208968591 U CN 208968591U CN 201821918358 U CN201821918358 U CN 201821918358U CN 208968591 U CN208968591 U CN 208968591U
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- pipeline section
- water
- upstream
- downstream
- fixed pipeline
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Abstract
The utility model discloses a kind of assembled local head loss experimental provisions, including experimental level platform, experimental level platform is supported on ground by telescoping shoring column, one end of experimental level platform is provided with constant pressure sink, constant pressure sink is connected to the fixed pipeline section in upstream, the fixed pipeline section in upstream is connected on fixed bracket, is connected with Reynolds number tester and small comprehensive sensor on the fixed pipeline section in upstream；Sliding is provided with movable supporting frame on experimental level platform, the fixed pipeline section in downstream is connected on movable supporting frame, Reynolds number tester and small comprehensive sensor, local head loss's situation multiplicity provided by the utility model, convenient for user's inquiry experiment rule are connected on the fixed pipeline section in downstream；The streamflow regime multiplicity of offer, experiment pipeline section is assembled, and user can according to need, it is optionally combined out the head loss situation of various other unknown forms, it is easy to operate, it is easy for assembly, each build-up member is standard component, is easily found in the market and cheap.
Description
Technical field
The utility model relates to a kind of experimental provisions, concretely relate to a kind of assembled local head loss experiment dress
It sets.
Background technique
Nowadays, domestic all university's hydraulic engineering relevant specialities open up hydraulic experiment course, in overwhelming majority experiment
Rong Jun is exploring experiments, and only a few experiment is replication experiment, and local head loss's experiment is one of them.
Local head loss's experimental provision of mainstream be centre there is sudden enlargement, diminution suddenly, 90 ° of fillets,
The round tube of 180 ° of fillets, 90 ° of dog-ears, five kinds of local head loss's situations, both ends respectively connected water tank and valve downstream, five
It is respectively connected with a Venturi tube before and after the position that local head loss, place occurs and measures head.The device is primarily present two and asks greatly
Topic:
Firstly, given initial head is fixed value, it is to add overflow weir to form with sink, according to hydraulics classical theory
In the local loosening formula scope of application from the point of view of, the Reynolds number for the low water head water that existing laboratory provides is too small, far
Less than the formula scope of application, therefore the relative error for causing the experimental result and theoretical value is very big.Therefore, head value should be larger
It is adjusted in range, to probe into rule.
Secondly, five kinds of local head loss's states only have a kind of corresponding situation mainly to pass through in existing laboratory
The method that valve opening and closing controls flow changes experimental variable, seeks rule, but flow and angle influence local head loss
The value of coefficient, therefore should be using the part with relevant control variable and change variable in device.
Utility model content
The purpose of the utility model is to overcome deficiency in the prior art, provides and a kind of fabricated be easy to probe into local water
The experimental provision of head loss coefficient rule.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions:
A kind of assembled local head loss experimental provision, including experimental level platform, experimental level platform is by telescoping shoring column
It is supported on ground, one end of experimental level platform is provided with constant pressure sink, and constant pressure sink is connected to the fixed pipeline section in upstream, and upstream is solid
Determine pipeline section to be connected on fixed bracket, is connected with Reynolds number tester and small comprehensive sensor on the fixed pipeline section in upstream；Experiment
Sliding is provided with movable supporting frame on horizontal platform, the fixed pipeline section in connection downstream on movable supporting frame, connects on the fixed pipeline section in downstream
Have a Reynolds number tester and small comprehensive sensor, experiment with pipeline section be installed on upstream fix pipeline section and downstream fix pipeline section it
Between；The water outlet of the fixed pipeline section in downstream is connected with flow control valve, the experimental level below the water outlet of the fixed pipeline section in downstream
Water receiving sink is provided on platform, water receiving sink is connected to downstream technology pipe, and downstream technology pipe is connected to airtight water tank；Described device
It further include computer, Reynolds number tester is connect with computer data with small comprehensive sensor.
From the coefficient of viscosity of test section water temperature, water can be read directly in computer, the piezometric head value from test point,
Convenient for operation, the time of laboratory technician has been saved when carrying out many experiments.
Airtight water tank has enough volume storage experimental waters, and overflow plate overflowing liquid is defeated by upstream in the constant pressure sink
Water pipe flows back to airtight water tank.Whole system forms recycling for liquid.The fixed pipeline section in the upstream is connected with constant pressure sink,
And be placed on fixed bracket, centre is mounted with a Reynolds number tester.The fixed pipeline section in the downstream is placed in removable branch
Above frame, movable supporting frame is mounted on slideway.The assembly pipeline section is connected directly between the fixed pipeline section in upstream according to experiment demand
Above the fixed pipeline section in downstream.
Experiment tube is assembled pipeline section, and experiment length of pipe section can be adjusted by movable supporting frame, can not only test difference
Length, roughness straight experiment tube frictional head loss resistance coefficient, and various types of local head loss can be tested
Coefficient is easy to the rule that experimenter probes into local loosening.
Preferably, being provided with levelling tube on experimental level platform.
Preferably, constant pressure sink is supported on experimental level platform by adjustable up-down platform.
Preferably, being provided with slideway on experimental level platform, movable supporting frame is located in the slideway, and in slideway freely
Sliding.
Preferably, being provided with overflow plate in constant pressure sink, overflow plate will be separated into two compartments inside constant pressure sink, overflow
Flowing plate side be water filling area, when fill the water area water overflow across overflow plate after, into the overflow area of the overflow plate other side, overflow area with it is upper
Water-supply-pipe connection is swum, upstream water-supply-pipe is connected to airtight water tank, is additionally provided with water pump between upstream water-supply-pipe and airtight water tank.
Compared with prior art, the utility model has the beneficial effects that
1, local head loss's situation multiplicity provided by the utility model, convenient for user's inquiry experiment rule.
2, streamflow regime multiplicity provided by the utility model, almost covers stream of the Reynolds number between 1000-20000
State.
3, the utility model is assembled, and user can according to need, and is optionally combined out various other unknown forms
Head loss situation.
4, the utility model is assembled, easy to operate, easy for assembly, and each build-up member is standard component, is held in the market
It easily finds and cheap.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Wherein: 1 being experimental level platform, 2 be telescoping shoring column, 3 be constant pressure sink, 4 be Reynolds number tester, 5 be fixed
Bracket, 6 be small comprehensive sensor, 7 be the fixed pipeline section in upstream, 8 be graduated scale, 9 be assembly pipeline section, 10 be slideway, 11 be under
Swim fixed pipeline section, 12 be movable supporting frame, 13 be flow control valve, 14 be water receiving sink, 15 be downstream technology pipe, 16 be close
Close water tank, 17 be water pump, 18 be computer, 19 be upstream water-supply-pipe, 20 be levelling tube, 21 be adjustable up-down platform, 22 be excessive
Flowing plate.
Specific embodiment
Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer
With carrying out various modifications or alterations under the spirit without departing from the utility model.It should be noted that the case where not conflicting
Under, the feature in following embodiment and embodiment can be combined with each other.
It should be noted that diagram provided in following embodiment only illustrates the basic of the utility model in a schematic way
Conception, only shown in schema then with related component in the utility model rather than component count when according to actual implementation, shape
And size is drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout
Kenel may also be increasingly complex.
A kind of assembled local head loss experimental provision shown in Fig. 1, including experimental level platform 1, telescoping shoring column 2, perseverance
Pressure tank 3, Reynolds number tester 4, fixed bracket 5, small comprehensive sensor 6, the fixed pipeline section 7 in upstream, graduated scale 8, assembly pipe
Section 9, slideway 10, downstream fixed pipeline section 11, movable supporting frame 12, flow control valve 13, water receiving sink 14, downstream technology pipe
15, airtight water tank 16, water pump 17, computer 18, upstream water-supply-pipe 19, levelling tube 20, adjustable up-down platform 21 and overflow plate 22.
The airtight water tank 16 is arranged in 1 lower section of experimental level platform, and the constant pressure sink 3 is arranged in horizontal 1 top of experimental bench, described to connect
Water sink 14 is arranged in the lower section of fixed 11 end of pipeline section in downstream, and bottom opening is connected with downstream technology pipe 15, downstream technology pipe
15 other ends are close to airtight water tank 16, meanwhile, airtight water tank 16 is connected further through upstream water-supply-pipe with constant pressure sink 2.Flow control
The setting of valve 13 processed is on the fixed pipeline section 11 in downstream.The adjustable up-down platform 21 is placed in constant pressure water tank 2.The water receiving
Sink 14 has enough volumes to collect tail water by the fixed position of steelframe.The airtight water tank 16 has enough volume storage experiments to use
Water.22 overflowing liquid of overflow plate flows back to airtight water tank 16 by upstream water-supply-pipe in the constant pressure sink 2.Whole system forms liquid
Body recycles.The fixed pipeline section 7 in the upstream is connected with constant pressure sink 3, and is placed on fixed bracket 5, centre installation
One Reynolds number tester 4.The fixed pipeline section 11 in the downstream is placed in above movable supporting frame 12, and movable supporting frame 12 is installed
On slideway 10.The assembly pipeline section 9 is connected directly between on the fixed pipeline section 11 of the fixed pipeline section 7 in upstream and downstream according to experiment demand
Face.The fixed pipeline section of the upstream and downstream is separately installed with small comprehensive sensor 6.
Below by way of the specific implementation for illustrating the utility model for the fillet local loosening for measuring each angle
Mode.
Before experiment starts, circuit is connected, computer 18, Reynolds number tester 4 are opened, by small comprehensive sensor 6
It is put into the fixed pipeline section in upstream, the fixed pipeline section in downstream, flow control valve 13 is opened, adjustable up-down platform 21 is minimized, root
According to levelling tube 20, experimental level platform 1 is adjusted to horizontality.
According to experiment needs, experiment tube segment type, such as 90 ° of bend pipe are installed in selection at assembly pipeline section 9, according to selected
The mobile movable supporting frame 12 of size of pipeline section reach appropriate position, open water pump 17, whether observation Reynolds number tester 4 arrives
The section allowed up to experiment adjusts adjustable up-down platform 21, is allowed to meet requirement of experiment if be not able to satisfy.
Flow control valve 13 is adjusted, the flow that every 5s increases 20ml/s is allowed to, small comprehensive sensor 6 measures water in real time
Head, water temperature, the coefficient of viscosity of water, and be sent on computer 18 by bluetooth, computer 18 is responsible for recording and stores data, when
When flow control valve 13 opens to the maximum, computer stops recording data, starts to process data, by resulting average local head
Loss coefficient is recorded.This experiment terminates.Small comprehensive sensor is by multiple sensor integration one, multiple sensors
Including water flow sensor, water temperature sensor and the laser photoelectricity sensor of the coefficient of viscosity for measuring water etc..
It should be noted that need to only ressemble experiment pipeline section when measuring other kinds of waterhead fall.
Openable airtight water tank discharge outlet when experiment liquid is needed replacing, liquid, then replacement of uncapping is discharged.
Since the operation other than pipeline section is tested in replacement carries out automatically, reading and stream including piezometric head
The assembled experiment tube of amount, the present apparatus is standard component, and specification is fixed, and is convenient for experimenter is simple, quick, efficient to carry out in fact
It tests.
Specific embodiment of the present utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.
Undeclared part involved in the utility model is same as the prior art or is realized using the prior art.
Claims (5)
1. a kind of assembled local head loss experimental provision, which is characterized in that including experimental level platform, experimental level platform is by can
Telescope support is supported on ground, and one end of experimental level platform is provided with constant pressure sink, and the fixed pipeline section of constant pressure sink and upstream connects
Logical, the fixed pipeline section in upstream is connected on fixed bracket, and Reynolds number tester and small comprehensive biography are connected on the fixed pipeline section in upstream
Sensor；Sliding is provided with movable supporting frame on experimental level platform, the fixed pipeline section in connection downstream, downstream fixing pipe on movable supporting frame
Reynolds number tester and small comprehensive sensor are connected in section, and experiment, which with pipeline section is installed on upstream, to be fixed pipeline section and fix with downstream
Between pipeline section；
The water outlet of the fixed pipeline section in downstream is connected with flow control valve, the experimental level below the water outlet of the fixed pipeline section in downstream
Water receiving sink is provided on platform, water receiving sink is connected to downstream technology pipe, and downstream technology pipe is connected to airtight water tank；Described device
It further include computer, Reynolds number tester is connect with computer data with small comprehensive sensor.
2. a kind of assembled local head loss experimental provision according to claim 1, it is characterized in that: on experimental level platform
It is provided with levelling tube.
3. a kind of assembled local head loss experimental provision according to claim 1, it is characterized in that: constant pressure sink passes through
Adjustable up-down platform is supported on experimental level platform.
4. a kind of assembled local head loss experimental provision according to claim 1, it is characterized in that: on experimental level platform
It is provided with slideway, movable supporting frame is located in the slideway, and free to slide in slideway.
5. a kind of assembled local head loss experimental provision according to claim 1, it is characterized in that: being set in constant pressure sink
It is equipped with overflow plate, overflow plate will be separated into two compartments inside constant pressure sink, overflow plate side is water filling area, when the water in water filling area
After overflowing across overflow plate, into the overflow area of the overflow plate other side, overflow area is connected to upstream water-supply-pipe, and upstream water-supply-pipe is connected to
Airtight water tank is additionally provided with water pump between upstream water-supply-pipe and airtight water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821918358.2U CN208968591U (en) | 2018-11-21 | 2018-11-21 | A kind of assembled local head loss experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821918358.2U CN208968591U (en) | 2018-11-21 | 2018-11-21 | A kind of assembled local head loss experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208968591U true CN208968591U (en) | 2019-06-11 |
Family
ID=66765590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821918358.2U Expired - Fee Related CN208968591U (en) | 2018-11-21 | 2018-11-21 | A kind of assembled local head loss experimental provision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208968591U (en) |
-
2018
- 2018-11-21 CN CN201821918358.2U patent/CN208968591U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190611 Termination date: 20191121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |