CN204614340U - A kind of bypass type laminar flow experiment voltage stabilizer - Google Patents
A kind of bypass type laminar flow experiment voltage stabilizer Download PDFInfo
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- CN204614340U CN204614340U CN201520178425.1U CN201520178425U CN204614340U CN 204614340 U CN204614340 U CN 204614340U CN 201520178425 U CN201520178425 U CN 201520178425U CN 204614340 U CN204614340 U CN 204614340U
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Abstract
The utility model discloses a kind of bypass type laminar flow experiment voltage stabilizer.It has pumping line, valve, the thin choker-line of bypass, buffer tank and experimental channel feed pipe.Affect by water pump, the input water body pressure surge of this voltage stabilizer is very large.For the pressure surge phenomenon of laminar flow experiment during elimination low discharge, the upper and lower side of valve is provided with by-pass pipe.Laminar flow experiment is carried out when valve complete shut-down, and the fluctuating flow now before valve can only after by-pass pipe flow valves, the thickness length of its by-pass pipe, just in time makes inflow-rate of water turbine control can meet in the flow range needed for laminar flow.Again through buffer tank secondary pressure, when flowing to the output terminal of voltage stabilizer, its precision of voltage regulation just can be made to exist
+within 0.5 millimeter, 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.This stable-pressure device, structure is simple, easy to operate, with low cost.
Description
Technical field
The utility model relates to teaching and experiment equipment.Particularly relate to a kind of bypass type laminar flow experiment voltage stabilizer.
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, experimental precision and stability can be had a strong impact on, the on-way resistance experiment instrument of the 7 millimeters of experimental channels commonly used for tradition below, its technical background is described, hereinafter involved technical data, all with this example for 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 that water has first been transported to free surface casing 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 acting head less than 1 meter.And along journey experiment in the turbulent flow experimental phase, delivery head can, up to 10-20 rice, be therefore not suitable for being supplied water by pressurizer tank, the on-way resistance experiment instrument reason that can only be supplied water by airtight buffer tank traditionally that Here it is.If this buffer tank is enough large, adds shunting process, comparatively ideal voltage regulation result can be reached, such as go up example, through the utility model people experimental study, show that the diameter of buffer tank need reach more than 25 centimetres, install isocon additional again, 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 high to buffer tank requirement of withstand voltage, and tank body manufacturing cost is large; Two is this kind of tank bodies not reached voltage stabilizing requirement 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, its voltage regulation result is generally very poor, can only reach the voltage regulation result of more than 4-6 millimeter under laminar condition.Even if voltage stabilizing like this, also must install part flow arrangement additional, just can reach.Resemble the experiment instrument of this kind of pressure surge more than 2 millimeters, education experiment requirement can not be met.
As how the simplest structure and method solves the on-way resistance experiment instrument pressure stability problem of water pump direct-furnish, it is 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 laminar flow experiment voltage stabilizer.To improve the voltage regulation result of water pump direct-furnish on-way resistance experiment instrument, especially improve the voltage regulation performance in laminar flow stage.
Specific embodiments of the present utility model is as follows:
A kind of bypass type laminar flow experiment voltage stabilizer has pumping line, valve, buffer tank, the thin choker-line of bypass and experimental channel feed pipe, and pumping line is provided with valve.
The diversion end of the thin choker-line of described bypass is located on the preceding pipeline of valve, and water side is located on the pipeline between valve and buffer tank;
Described buffer tank is arranged between valve and experimental channel feed pipe.
The input water body of this voltage stabilizer is valve preceding pipeline current, and the output water body of voltage stabilizer is buffer tank output channel current.Affect by water pump, the input water body pressure surge of this voltage stabilizer is very large.For the pressure surge phenomenon of laminar flow experiment during elimination low discharge, the upper and lower side of valve is provided with the thin choker-line of bypass.Laminar flow experiment is carried out when valve complete shut-down, and the fluctuating flow now before valve can only after the thin choker-line flow valves of bypass, the thickness length of the thin choker-line of its bypass, just in time makes inflow-rate of water turbine control can meet in the flow range needed for laminar flow.Because the thin choker-line of bypass has good wave absorption pressure stabilization function, when these one low discharge current flow to after valve through the thin choker-line of bypass, be namely in the basicly stable state of pressure.Again through at present conventional small-sized buffer tank (urceolus as the water supply pipe filtrator of diameter 10 cm) secondary pressure, just can reach large-scale buffer tank and add the more high precision that part flow arrangement can reach.As above example, through experiment test, just can make its precision of voltage regulation exist
+within 0.5 millimeter, 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.This stable-pressure device, structure is simple, easy to operate, with low cost.
The beneficial effect that the utility model has is:
1, under water pump direct-furnish condition, 1 millimetre-sized voltage regulation performance can be realized, 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, the isocon in traditional experiment can also be saved;
3, ingeniously utilize fluid mechanics principle, structure is simple, and with low cost, voltage regulation result is good.
4, as education experiment application innovation, the creativity consciousness of the student that can motivate students' interest in learning, can inspire is useful to cultivation innovation ability.
Accompanying drawing explanation
Fig. 1 is a kind of bypass type laminar flow experiment stabilizator structure schematic diagram, and in figure, each structural member title is as follows: 1 pumping line, 2 valves, 3 buffer tanks, the thin choker-line of 4 bypass, 5 experimental channel feed pipes.
Embodiment
As shown in Figure 1, a kind of bypass type laminar flow experiment voltage stabilizer has pumping line 1, valve 2, buffer tank 3, the thin choker-line 4 of bypass and experimental channel feed pipe 5, pumping line 1 is provided with valve 2.
The diversion end of the thin choker-line 4 of described bypass is located on the preceding pipeline of valve 2, and water side is located on the pipeline between valve 2 and buffer tank 3;
Described buffer tank 3 is arranged between valve 2 and experimental channel feed pipe 5.
If between water pump and buffer tank, install the valve of an adjustable aperture additional, utilize the aperture of control valve to carry out flow-limiting voltage-stabilizing, also can reach the effect of voltage stabilizing, but too bother, teachers and students are reluctant to adopt.Because it is very harsh that the current limliting of voltage stabilizing requires, the too little requirement not reaching laminar flow maximum flow, causes pressure surge too greatly, exceedes allowed band.Be the most frequently used in education experiment shown in upper example, the flow of its laminar flow is only 10 milliliters of left and right per second, and in pressure piping, controlling opening of valve will reach the laminar flow stage maximum flow scope of regulation, careless slightly, will be bigger than normal or less than normal.And when adjusting back, Yin Putong adjustable gate has an idle motion, operation bothers more.So, never adopt the aperture of control valve to regulate to the stability carrying out laminar flow traditionally.
For solving the problem, and consider and to affect by water pump, the input water body pressure surge of this voltage stabilizer is very large.The utility model is the pressure surge phenomenon of laminar flow experiment when eliminating low discharge, and the upper and lower side of valve is provided with by-pass pipe.Laminar flow experiment is carried out when valve complete shut-down, and the fluctuating flow now before valve can only after by-pass pipe flow valves, the thickness length of its by-pass pipe, just in time makes inflow-rate of water turbine control can meet in the flow range needed for laminar flow.Because by-pass pipe has good wave absorption pressure stabilization function, when these one low discharge current flow to after valve through by-pass pipe, be namely in the basicly stable state of pressure, then through buffer tank secondary pressure, when flowing to the output terminal of voltage stabilizer, its precision of voltage regulation just can be made to exist
+within 0.5 millimeter, thus under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met.
The thickness of the thin choker-line of bypass can the thickness of experimentally pipeline be selected, and as the experimental channel of 0.7 millimeter, can select the flexible rubber hose of diameter 3 millimeter.Accurate bypass thin choker-line thickness length, is determined by experiment, and the flow that the thin choker-line of its bypass passes through just should can meet the traffic requirement of laminar flow experiment.
The bypass type laminar-turbulent flow experimental technique of described voltage stabilizer is:
During turbulent flow experiment, valve 2 standard-sized sheet, current, through buffer tank 3 voltage stabilizing, flow to experimental channel, and this voltage stabilizing state is identical with traditional existing voltage stabilizing state, and the flow-shape in experimental channel is turbulent flow experimental state;
When carrying out laminar flow experiment, by valve 2 complete shut-down, experiment current through bypass thin choker-line wave absorption voltage stabilizing and current limliting export, then flow into buffer tank 3, 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, all by the flow regulation valve regulation of experimental channel end.This voltage-stabilizing system can fill, and also can not fill isocon, all can reach voltage stabilizing requirement, especially the voltage stabilizing requirement in laminar flow stage.
Claims (3)
1. a bypass type laminar flow experiment voltage stabilizer, is characterized in that it has pumping line (1), valve (2), buffer tank (3), the thin choker-line of bypass (4) and experimental channel feed pipe (5), pumping line (1) is provided with valve (2).
2. a kind of bypass type laminar flow experiment voltage stabilizer according to claim 1, it is characterized in that the diversion end of the thin choker-line of described bypass (4) is located on the preceding pipeline of valve (2), water side is located on the pipeline between valve (2) and buffer tank (3).
3. a kind of bypass type laminar flow experiment voltage stabilizer according to claim 1, is characterized in that described buffer tank (3) is arranged between valve (2) and experimental channel feed pipe (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520178425.1U CN204614340U (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type laminar flow experiment voltage stabilizer |
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| CN201520178425.1U CN204614340U (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type laminar flow experiment voltage stabilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104751730A (en) * | 2015-03-27 | 2015-07-01 | 杭州源流科技有限公司 | Bypass type laminar flow experiment voltage stabilizer and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104751730A (en) * | 2015-03-27 | 2015-07-01 | 杭州源流科技有限公司 | Bypass type laminar flow experiment voltage stabilizer and method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180327 |