CN204557884U - A kind of bypass type bistable formula on-way resistance experiment instrument - Google Patents
A kind of bypass type bistable formula on-way resistance experiment instrument Download PDFInfo
- Publication number
- CN204557884U CN204557884U CN201520178437.4U CN201520178437U CN204557884U CN 204557884 U CN204557884 U CN 204557884U CN 201520178437 U CN201520178437 U CN 201520178437U CN 204557884 U CN204557884 U CN 204557884U
- Authority
- CN
- China
- Prior art keywords
- experiment
- pressure
- flow
- water
- bypass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000003381 stabilizer Substances 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 14
- 230000000087 stabilizing effect Effects 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Electromagnetic Pumps, Or The Like (AREA)
Abstract
The utility model discloses a kind of bypass type bistable formula on-way resistance experiment instrument.It by water storage box, high-lift pump, feed pipe, manually or electrically operated valve, the thin choker-line of current limliting bypass, buffer tank, experimental channel, flow control valve, funnel, return pipe and measurement instrument etc. form.On-way resistance experiment instrument must possess laminar flow experiment and turbulent flow experiment dual-use function.When valve complete shut-down, draw and flow to experimental channel from the pressure water of water pump through by-pass pipe before valve, by-pass pipe can eliminate water body pressure surge before the valve caused because of water pump very well, plays good wave absorption pressure stabilization function.Again through buffer tank secondary pressure, its precision of voltage regulation is existed
+within 0.5 millimeter, under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met.Solve water pump direct-furnish condition underflow stable experiment problem.Simultaneously in stage of turbulent flow, utilize buffer tank to carry out voltage stabilizing, reach good turbulent flow voltage regulation result.This experimental provision, pressure stability, measuring accuracy is high, and structure is simple, easy to operate.
Description
Technical field
The utility model relates to teaching and experiment equipment.Particularly relate to a kind of bypass type bistable formula on-way resistance experiment instrument and.
Background technology
In fluid mechanics hydraulics education experiment, a basic experiment project very is widely applied in on-way resistance experiment in universities.The on-way resistance experiment instrument that it uses, is directly supplied water by water pump usually, is a kind of self-loopa water supply experimental apparatus.Pressure surge in the self-loopa piping system that this experimental apparatus causes because of water pump, can have a strong impact on experimental precision and stability, and the on-way resistance experiment instrument of the 7 millimeters of experimental channels commonly used for tradition below, illustrates its technical background.
On-way resistance experiment comprises laminar flow experiment and turbulent flow experiment content, the acting head of its turbulent flow requirement of experiment experimental channel is high, flow is large, as above the water supply lift of pump described in example is 8-20 rice, maximum flow is that 200-300 milliliter is per second, this high-lift pump can cause larger pressure surge, especially can reach the water column or higher of several centimetres at low pressure end.Due to the laminar flow experimental phase, flow is very little, its peak flow values is about about 10 milliliters per second, and the loss of its laminar flow is about 1-3 cm range (relevant with water temperature), and the pressure surge that the self-circulation system of therefore water pump direct-furnish produces makes laminar flow experiment almost cannot normally carry out.In addition, pipe laminar fluidised form itself can not produce pressure fluctuation, if the laminar flow pressure surveyed, having obvious pulsation phenomenon, is do not meet objective law, also against teaching key concept.Therefore from experimental error or teaching request, all wish that, in the laminar flow experimental phase, the pressure surge of measuring point is the smaller the better.
Voltage regulation way is the mode adopting buffer tank traditionally, instead of the mode of pressurizer tank.So-called pressurizer tank is the uncovered casing that water is first transported to free surface by water pump, and the water body after casing voltage stabilizing, resupplies experimental channel.Pressurizer tank pressure-stabilizing water supply is only applicable to the experimental system of below acting head 1-2 rice.And along journey experiment in the turbulent flow experimental phase, delivery head can up to more than 10-20 rice, therefore be not suitable for being supplied water by uncovered pressurizer tank, Here it is traditionally on-way resistance experiment instrument can only be carried out the reason of pressure-stabilizing water supply by sealing buffer tank.Adopt the voltage stabilizing of sealing buffer tank, if good voltage regulation result will be reached, shunting process must be added, and buffer tank is enough large.Such as go up example, the experiment through the utility model people shows, the diameter of buffer tank need reach more than 25 centimetres, then installs isocon additional, through shunting process, could under laminar flow state, voltage regulation result be reached
+1 millimeter.This is existing best a kind of voltage regulation way.There is following two problems in this voltage regulation way: one is that buffer tank wants large, and withstand voltage high, tank body is produced difficult, and manufacturing cost is large; Two is that buffer tank can not use gasbag-type, and use tank body water injection type, as buffer tank in accompanying drawing (5), this buffer tank diameter, more than 20 centimetres, does not have in the market.Therefore on-way resistance experiment instrument used at present, except the utility model people produces, has not adopted the on-way resistance experiment instrument of this large head tank voltage stabilizing.Present employing be all small pressure tank, and added part flow arrangement, but its voltage regulation result is generally very poor, still has the pressure surge of more than the 4-6 millimeter of water under laminar condition.Pressure surge is greater than the experiment instrument of more than 2 millimeters of water, can not meet education experiment requirement.
How developing a kind of laminar-turbulent flow stage, can to reach voltage regulation result good, and structure is simple, and convenient and practical, can meet the water pump direct-furnish water on-way resistance experiment instrument of education experiment requirement, be a difficult problem anxious to be resolved in experimental teaching field.
Summary of the invention
The purpose of this utility model is to provide a kind of bypass type bistable formula on-way resistance experiment instrument, to improve the voltage regulation result of water pump direct-furnish on-way resistance experiment instrument, especially improves the voltage regulation performance in laminar flow stage.
The technical solution of the utility model is as follows:
A kind of bypass type bistable formula on-way resistance experiment instrument has water storage box, high-lift pump, feed pipe, bypass type bistable formula voltage stabilizer, experimental channel, flow control valve, funnel, return pipe; Water storage box, high-lift pump, bypass type bistable formula voltage stabilizer, flow control valve are connected in turn, be experimental channel between bypass type bistable formula voltage stabilizer and flow control valve, be feed pipe between high-lift pump and bypass type bistable formula voltage stabilizer, flow control valve outlet is just to funnel, and funnel is connected with water storage box by return pipe.
Described bypass type bistable formula voltage stabilizer is made up of manual or electrically operated valve, the thin choker-line of current limliting bypass and buffer tank, and the thin choker-line of current limliting bypass is connected to manually or the upstream of electrically operated valve and downstream end.
Take the bi-stable configuration of a kind of bypass type laminar flow voltage stabilizer and pot type voltage stabilizer, to improve stability and the experimental precision of laminar flow experiment.The thin choker-line of bypass is arranged on the upper and lower side of valve, and be a current limiting tube of nearly 10 times more tiny of vibration means for main pipe for supplying water, its caliber thickness and length, determined by experiment.When should meet valve complete shut-down, maximum inflow-rate of water turbine is limited within the scope of the maximum flow needed for laminar flow.
When valve complete shut-down, draw before valve and flow to experimental channel from the pressure water of water pump through the thin choker-line of bypass.When this one low discharge flows through current limliting bypass thin choker-line, the thin choker-line of current limliting bypass can eliminate water body pressure surge before the valve caused because of water pump very well, plays good wave absorption pressure stabilization function.Again through buffer tank secondary pressure, the water flow pressure fluctuation of 99% can be eliminated.As above example, makes in water pump feed pipe
+water pressure fluctuations values more than 20 centimeter water columns, voltage stabilizing is arrived
+within 0.5 millimeter of water.Thus under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met.Very scabrous laminar flow stable experiment problem under solving the condition of water pump direct-furnish for a long time.Simultaneously in stage of turbulent flow, utilize buffer tank to carry out voltage stabilizing, also reach good turbulent flow voltage regulation result.This experimental provision, pressure stability, measuring accuracy is high, and structure is simple, easy to operate.
The beneficial effect that the utility model has is:
1, realize laminar flow stage 1 millimetre-sized voltage regulation performance, the pressure-stabilizing water supply demand of laminar flow experiment can be met completely.Very scabrous laminar flow stable experiment problem under solving the condition of water pump direct-furnish for a long time;
2, substituted for the large-scale head tank run out of goods in market with small pressure tank, and save the isocon in traditional experiment instrument;
3, ingeniously utilize fluid mechanics principle, structure is simple, and easy to operate, voltage regulation result is good; Laminar flow and turbulent flow experiment can be carried out on same set of experimental provision.
4, the utility model is as hydrodynamic calculations instruments used for education, and the fluid mechanics principle that make use of of novelty solves an experiment difficult problem, the creativity consciousness of the student that can motivate students' interest in learning, inspire, useful to cultivation innovation ability, possesses good teaching efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of bypass type bistable formula on-way resistance experiment instrument structure and self-loopa current flow schematic diagram, and in figure, each structural member title is as follows:
Water storage box 1, high-lift pump 2, feed pipe 3, bypass type bistable formula voltage stabilizer 4,
Experimental channel 5, flow control valve 6, funnel 7, return pipe 8, manual or electrically operated valve 9, the thin choker-line 10 of current limliting bypass, buffer tank 11.
Embodiment
As shown in Figure 1, a kind of bypass type bistable formula on-way resistance experiment instrument, it has water storage box 1, the water body in case through high-lift pump 2, to experimental channel 5 water delivery.Because pumping line pressure surge is very large, for eliminating the water pressure fluctuations of experimental channel, on connecting pipe between water pump 2 and experimental channel 5, be in series with manually or bypass type bistable formula voltage stabilizer 4 that electrically operated valve 9, the thin choker-line 10 of current limliting bypass and buffer tank 11 are formed, experimental channel 5; Be the pipeline measuring on-way resistance, pipeline be provided with pressure tap and measurement of discharge measuring point, measuring point hydraulic pressure be connected to relevant tradition or the measurement mechanism in modern times, as electronic manometer, electronic flow instrument or U-shaped piezometric tube measuring cell etc.Because this device is provided with funnel 7, can when special low discharge, by gravimetric method manual measurement flow.Adjust flux control valve 6 can change empirical flow.Experiment water body from flowing back to water storage box 1, completes current self-loopa through return pipe 8.
The size of head tank can experimentally the thickness of pipeline and maximum flow be selected, as the experimental channel of 0.7 millimeter, maximum flow be 300 milliliters per second, the urceolus of the water supply pipe filter device therefor of diameter 10 cm can be selected.
The thin choker-line of bypass is arranged on the upper and lower side of valve, and be a current limiting tube of nearly 10 times more tiny of vibration means for main pipe for supplying water, its caliber thickness and length, determined by experiment.When should meet valve complete shut-down, its maximum inflow-rate of water turbine is limited within the scope of the maximum flow needed for laminar flow.
Examination on experimental operation:
Zeroing operation; Will manually or electrically operated valve 9 and flow control valve 6 all contract fullys; Experiments of measuring pipeline, the pressure difference between upstream and downstream two measuring point, regulates pressure reduction electric pilot zero point, is zero.Adjust flux meter zero point, be zero.Experiment shows, as above example, and its piezometric surface undulating quantity is less than
+0.5 millimeter;
During turbulent flow experiment, manual or electrically operated valve 9 standard-sized sheet, current, through buffer tank 11 voltage stabilizing, flow to experimental channel, this voltage stabilizing state and traditional existing voltage stabilizing state phase, and the flow-shape in experimental channel is turbulent flow experimental state;
When carrying out laminar flow experiment, will manually or electrically operated valve 9 complete shut-down, experiment current are through bypass thin choker-line wave absorption voltage stabilizing and current limliting exports pipeline after valve to, flow into buffer tank 11 again, after buffer tank voltage stabilizing, flow to experimental channel, the flow-shape in experimental channel is laminar flow experimental state;
No matter the empirical flow of laminar flow or stage of turbulent flow regulates, and all can be regulated by the flow control valve 6 of experimental channel end, current export funnel 7 to through flow control valve 6, and return water storage box 1 via return pipe 8.
Experiment shows, on experimental channel, the piezometric tube undulating quantity of each pressure tap is all less than
+0.5 millimeter.
Claims (2)
1. a bypass type bistable formula on-way resistance experiment instrument, is characterized in that it has water storage box (1), high-lift pump (2), feed pipe (3), bypass type bistable formula voltage stabilizer (4), experimental channel (5), flow control valve (6), funnel (7), return pipe (8); Water storage box (1), high-lift pump (2), bypass type bistable formula voltage stabilizer (4), flow control valve (6) are connected in turn, be experimental channel (5) between bypass type bistable formula voltage stabilizer (4) and flow control valve (6), be feed pipe (3) between high-lift pump (2) and bypass type bistable formula voltage stabilizer (4), flow control valve (6) outlet is just to funnel (7), and funnel (7) is connected with water storage box (1) by return pipe (8).
2. a kind of bypass type bistable formula on-way resistance experiment instrument according to claim 1, it is characterized in that described bypass type bistable formula voltage stabilizer (4) is made up of manual or electrically operated valve (9), the thin choker-line of current limliting bypass (10) and buffer tank (11), the thin choker-line of current limliting bypass (10) is connected to manually or the upstream of electrically operated valve (9) and downstream end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178437.4U CN204557884U (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type bistable formula on-way resistance experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178437.4U CN204557884U (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type bistable formula on-way resistance experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204557884U true CN204557884U (en) | 2015-08-12 |
Family
ID=53832969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520178437.4U Withdrawn - After Issue CN204557884U (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type bistable formula on-way resistance experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204557884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104778883A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Bypass and bi-stable type on-way resistance experiment instrument and method thereof |
-
2015
- 2015-03-27 CN CN201520178437.4U patent/CN204557884U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104778883A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Bypass and bi-stable type on-way resistance experiment instrument and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201340548Y (en) | Bypass circulation reflux electric adjusting device | |
| CN204557884U (en) | A kind of bypass type bistable formula on-way resistance experiment instrument | |
| CN204557885U (en) | A kind of throttle-type bistable formula on-way resistance experiment instrument | |
| CN207937313U (en) | A kind of device measuring three-dimensional rock core mobiloil water phase percolation curve | |
| CN104949718A (en) | Self-circulation open channel experimental device with teaching effect flow digital display function | |
| CN204614340U (en) | A kind of bypass type laminar flow experiment voltage stabilizer | |
| CN203520715U (en) | Comprehensive hydromechanics device capable of being freely combined | |
| CN104778881A (en) | Throttling type bistable on-way resistance experiment instrument and method thereof | |
| CN104778883A (en) | Bypass and bi-stable type on-way resistance experiment instrument and method thereof | |
| CN103853201B (en) | The device of a kind of adjustment water body pH that warms for simulation climate | |
| CN204554215U (en) | A kind of throttle type laminar flow experiment voltage stabilizer | |
| CN204788517U (en) | Self -loopa open channel experimental apparatus that possesses teaching effects flow digital display | |
| CN204044631U (en) | One makes stable, the accurate device of Small Flow Control | |
| CN204791693U (en) | Self -loopa bernoulli jacob experimental apparatus that possesses teaching effects flow digital display | |
| CN104596748B (en) | A kind of discharge assay device of air pipe head | |
| CN104751730B (en) | A kind of bypass type laminar flow experiment voltage-stablizer and its method | |
| CN105203295A (en) | Measuring device and method for measuring friction resistance of fracturing fluid | |
| CN211652018U (en) | Multiple stable series pipeline on-way resistance experiment appearance | |
| CN209729212U (en) | The on-way resistance experiment instrument of multistable | |
| CN100416254C (en) | Experimental apparatus for pressure regulating chamber teaching | |
| CN204791694U (en) | Venturi meter experimental apparatus that possesses synchronous flow digital display | |
| CN203487581U (en) | Flow-variable circulation pressure-stabilizing water supply device | |
| CN104952323A (en) | Self-circulation Bernoulli experimental device with teaching effect flow digital display function | |
| CN201780519U (en) | Device for stabilizing flow rate and pressure of oil and water | |
| CN103411777B (en) | Cylinder block flow resistance measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20170804 |
|
| AV01 | Patent right actively abandoned |