CN103398938A - Internal corrosion test bed for heat exchanger - Google Patents
Internal corrosion test bed for heat exchanger Download PDFInfo
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- CN103398938A CN103398938A CN2013103271000A CN201310327100A CN103398938A CN 103398938 A CN103398938 A CN 103398938A CN 2013103271000 A CN2013103271000 A CN 2013103271000A CN 201310327100 A CN201310327100 A CN 201310327100A CN 103398938 A CN103398938 A CN 103398938A
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Abstract
The invention provides an internal corrosion test bed for a heat exchanger, relating to the field of test beds, wherein the internal corrosion test bed is designed in order to stably control the flow rate of a system and lower the cost. The internal corrosion test bed comprises a liquid storage tank, a pump and the heat exchanger which are connected in sequence by main connecting pipelines, wherein the main connecting pipeline between the liquid storage tank and the pump is provided with a bypass pipeline in parallel; at least one of the main connecting pipeline between the pump and the exchanger and the bypass pipeline is provided with a main flow rate regulating valve. The internal corrosion test bed for the heat exchanger can be used for testing the internal corrosion property of the heat exchanger.
Description
Technical field
The present invention relates to the testing table field, relate in particular to a kind of heat exchanger internal corrosion testing table.
Background technology
Vehicle water heating type heating installation, use the waste heat of engine cooling and circulating system as thermal source, uses liquid coolant as circulation medium, uses heat exchanger as heat transmission equipment.Its specific implementation process is the liquid coolant of the heat with flowing out in engine cooling and circulating system, be introduced into heat exchanger through pipeline, this moment, the liquid coolant of heat was just carried out heat exchange by heat exchanger and air, usually by fan blower, the air in compartment or extraneous air are blown over heat exchanger, thereby make atmosphere temperature rising.In automotive field, the liquid coolant of the heat exchanger of flowing through (heater cores is generally the aluminum brazing product) generally is anti freezing solution, and anti freezing solution has certain corrosivity to heat exchanger.
In the production and performance history of product, people apply a kind of testing table, resistance to corrosion to heat exchanger is verified, the heat exchanger product that can not meet vehicle driving requirements is identified, identify holding corrosion-prone heat exchanger part and position, for the exploitation of heat exchanger product, verify and provide safeguard.
In prior art, this type of testing table adopts the enclosed working environment that is similar to engine-cooling system mostly, metal liquid reserve tank, automobile cooling pump, heat exchanger and relevant connection pipeline etc., consists of.In process of the test, the automobile cooling pump provides power for the circulation of test(ing) medium, and the test(ing) medium suction in liquid reserve tank is circulated to system.Test(ing) medium flows into heat exchanger by the road by the outlet end of pump, then is back to by the road liquid reserve tank.So circulation is gone down, until off-test.
In the cyclic process of above-mentioned anti freezing solution,, for the flow of the control system course of work with the heat exchanger under simulation real vehicle state, be provided with flow controller in above-mentioned testing table.But flow controller is stable not to the flow control of system; And its structure is comparatively complicated, and price comparison is high, makes the cost of whole testing table significantly increase.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of heat exchanger internal corrosion testing table, the flow of control system that can be stable and reducing costs.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of heat exchanger internal corrosion testing table, comprise the liquid reserve tank, pump and the heat exchanger that are connected successively by main connecting line, and the main connecting line between described liquid reserve tank and described pump has been arranged in parallel bypass line, and is provided with the main flow variable valve at least one of the main connecting line between described pump and heat exchanger and described bypass line.
Described main flow variable valve comprises the main valve in the main connecting line that is arranged between described pump and heat exchanger and/or is arranged on by-pass valve in bypass line.
Be provided with stop valve in described main connecting line, described stop valve is arranged on the recovery end of described liquid reserve tank.
Be arranged in parallel a plurality of test branch roads in described main connecting line, included a heat exchanger in each described test branch road.
Described heat exchanger in each described test branch road is connected respectively a branch road flow control valve is set.
Described heat exchanger internal corrosion testing table also comprises programmable controller, and described programmable controller is electrically connected with described main valve, described by-pass valve, described stop valve and each described branch road flow control valve respectively.
Described main connecting line neutralizes in each described test branch road and is respectively arranged with flowmeter, described flowmeter is electrically connected with described programmable controller respectively, and described programmable controller is controlled the aperture of described main valve and/or described by-pass valve and/or described branch road flow control valve according to the flow signal of described flowmeter feedback.
Be provided with electro connecting pressure gauge in described main connecting line, described electro connecting pressure gauge and described programmable controller are electrically connected, the superpressure that described programmable controller sends according to described electro connecting pressure gauge or the aperture of the described stop valve of under-voltage signal controlling.
Be provided with temperature sensor in described liquid reserve tank, be provided with well heater around described liquid reserve tank, described temperature sensor and described well heater are electrically connected with described programmable controller respectively, the temperature signal that described programmable controller sends according to described temperature sensor, control described well heater and start heating or stopped heating.
The below of each described heat exchanger arranges respectively a gatherer.
Described gatherer is up big and down small structure, comprise top and the cross-sectional area bottom less than the cross-sectional area on top that can hold whole heat exchanger, described bottom has been deposited a certain amount of test(ing) medium in advance, and floating on described test(ing) medium have a floatation type sensor.
Described floatation type sensor and described programmable controller are electrically connected, the signal of the level change that described programmable controller sends according to described floatation type sensor, and control system stops test, and shows the test branch road that level change occurs.
Described test(ing) medium is anti freezing solution.
The heat exchanger internal corrosion testing table that the embodiment of the present invention provides, and the main connecting line between liquid reserve tank and pump has been arranged in parallel bypass line.Main connecting line between pump and heat exchanger and bypass line receive liquid from the outlet end of pump simultaneously.The flow one of discharging when the outlet end of pump regularly, main connecting line between pump and heat exchanger and the flow of bypass line that long relations that for this reason disappear, that is to say, if the flow of bypass line increases, the flow of the main connecting line between pump and heat exchanger will reduce; If the flow of bypass line reduces, the flow of the main connecting line between pump and heat exchanger will increase.Therefore can regulate by the flowrate proportioning of the main connecting line between change pump and heat exchanger and bypass line the flow of the main connecting line between pump and heat exchanger.And at least one arranges flow control valve the main connecting line between pump and heat exchanger and bypass line.Aperture by by-pass valve control changes the proportion relation of the flow of main connecting line between pump and heat exchanger and bypass line.In addition, with bypass line and flow control valve, replace flow controller of the prior art, can reduce costs significantly.
Description of drawings
Each parts connection diagram of heat exchanger internal corrosion testing table that Fig. 1 provides for the embodiment of the present invention;
The gatherer schematic diagram of the heat exchanger internal corrosion testing table that Fig. 2 provides for the embodiment of the present invention;
Reference numeral:
The 1-liquid reserve tank, 2-pump, 3-main valve, 4-master's connecting line, the 5-bypass line, 6-by-pass valve, 7-main flow meter, 8-branch road flowmeter, the 9-heat exchanger, 10-branch road flow control valve, 11-electro connecting pressure gauge, the 12-stop valve, 13-temperature sensor, 14-well heater, the 15-gatherer, 16-facet collecting region, 17-floatation type sensor, the 18-test(ing) medium, the main connecting line between 41-liquid reserve tank and pump, the main connecting line between 42-pump and heat exchanger.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention heat exchanger internal corrosion testing table is described in detail.
As shown in Figures 1 and 2, the heat exchanger internal corrosion testing table that the embodiment of the present invention provides, comprise the liquid reserve tank 1, pump 2 and the heat exchanger 9 that are connected successively by main connecting line 4, and the main connecting line 41 between liquid reserve tank and pump has been arranged in parallel bypass line 5, and is provided with the main flow variable valve at least one of the main connecting line 42 between pump and heat exchanger 9 and bypass line 5.
The heat exchanger internal corrosion testing table that the embodiment of the present invention provides, and the main connecting line 41 between liquid reserve tank 1 and pump 2 has been arranged in parallel bypass line 5.Main connecting line 42 between bypass line 5 and pump and heat exchanger receives liquid from the outlet end of pump 2 simultaneously.The flow one of discharging when the outlet end of pump 2 regularly, both flows of main connecting line 42 between pump and heat exchanger and bypass line 5 that long relations that for this reason disappear, that is to say, if the flow of bypass line 5 increases, the flow of the main connecting line 42 between pump and heat exchanger will reduce; If the flow of bypass line 5 reduces, the flow of the main connecting line 42 between pump and heat exchanger will increase.Therefore can regulate by changing both flowrate proportionings of main connecting line 42 between pump and heat exchanger and bypass line 5 flow of the main connecting line 42 between pump and heat exchanger.And at least one arranges flow control valve the main connecting line 42 between pump and heat exchanger and bypass line 5.Aperture by by-pass valve control changes the proportion relation of both flows of main connecting line 42 between pump and heat exchanger and bypass line 5.In addition, with bypass line 5 and flow control valve, replace flow controller of the prior art, can reduce costs significantly.
Particularly, the main flow variable valve comprises the main valve 3 in the main connecting line 42 that is arranged between pump and heat exchanger 9 and/or is arranged on by-pass valve 6 in bypass line 5.
For example can in the main connecting line 42 between pump and heat exchanger, flow control valve be set, be referred to as main valve 3, when the aperture of main valve 3 increased, the fluid flow in the main connecting line 42 between pump and heat exchanger increased, and the flow in bypass line 5 reduces; When the aperture of main valve 3 reduced, the fluid flow in the main connecting line 42 between pump and heat exchanger reduced, and the flow in bypass line 5 increases.Preferably, main connecting line 42 and bypass line 5 between pump and heat exchanger both arrange flow control valve, and the valve in the main connecting line 42 between pump and heat exchanger is called main valve 3, and the valve in bypass line 5 is called by-pass valve 6.Main valve 3 and by-pass valve 6 can be realized the double action of the flow regulation of the main connecting line 42 between pump and heat exchanger, for example, when the flow in the main connecting line 42 between needs increase pump and heat exchanger, can increase the aperture of main valve 3, reduce simultaneously the aperture of by-pass valve 6, after the effect stack of these two valves, make the flow of the main connecting line 42 between pump and heat exchanger increase more obvious and quick.Therefore can be so that the adjusting of flow be more quick, sensitive under the acting in conjunction of main valve 3 and by-pass valve 6.
In addition, be provided with stop valve 12 in main connecting line 4, stop valve 12 is arranged on the recovery end of liquid reserve tank 1.
The end that stop valve 12 is arranged on systemic circulation is the recovery end of liquid reserve tank 1 namely, and stop valve 12 is retaining valves, can guarantee the one-way circulation of system.Another vital role of stop valve 12 is exactly the pressure for regulating system.After having carried out flow regulation, will carry out the adjusting of system pressure according to the requirement of test.This adjustment process is also that the adjusting by valve opening realizes.The aperture increase of stop valve 12 can reduce the pressure of system, the pressure that reduces to increase system of the aperture of stop valve 12.When the aperture of stop valve 12 increases, the cross-sectional area of test(ing) medium 18 when flowing through stop valve 12 becomes large, and the amount of liquid that flows through stop valve 12 in the unit interval is constant, so liquid will be slack-off by the speed of stop valve 12, and the speed of liquid by stop valve 12 to be pressure by system determine, therefore, the pressure of system reduces; Otherwise when the aperture of stop valve 12 reduced, the cross-sectional area of test(ing) medium 18 when flowing through stop valve 12 diminished, so the speed of liquid by stop valve 12 will accelerate, therefore, the pressure of system increases.
Usually, can only connect a heat exchanger 9 in main connecting line 4.But be not limited to this, for example, can be arranged in parallel a plurality of (for example 4) test branch road in main connecting line 4, include a heat exchanger 9 in each test branch road.The heat exchanger internal corrosion testing table that the embodiment of the present invention provides, can realize the test of a plurality of heat exchangers 9 simultaneously.Each heat exchanger 9 is identical for being arranged in parallel the pressure that can ensure each heat exchanger 9 inside, to simulate more effectively the duty of the heat exchanger 9 under the real vehicle state.Because under the real vehicle state, the pressure of heat exchanger 9 inside is relatively-stationary.
And the heat exchanger 9 in each test branch road is connected respectively a branch road flow control valve 10 is set.And by each branch road flow control valve 10, can control the flow of respectively testing branch road.In some cases, can be adjusted to the flow of respectively testing branch road identical, to test the corrosion resistance of each heat exchanger 9 under identical rate-of flow; Also can be adjusted to and respectively test branch road and have different flows, can detect like this impact of different flows on the decay resistance of heat exchanger 9.
Preferably, the heat exchanger internal corrosion testing table of the embodiment of the present invention also comprises the programmable controller (not shown), and programmable controller is electrically connected with pump 2, main valve 3, by-pass valve 6, stop valve 12 and each branch road flow control valve 10 respectively.
The introducing of programmable controller, replaced artificial effect, realizes that the robotization of system is controlled.This has saved manpower greatly, and, due to the adjusting of robotization, makes the flow of system and pressure and other parameters in each time point maintains default scope, can more testing under the state near real vehicle.So that the test findings that draws more meets the state in real vehicle.
In addition, main connecting line 4 neutralizations are respectively tested in branch road and are respectively arranged with flowmeter, flowmeter is electrically connected with programmable controller respectively, and programmable controller is controlled the aperture of main valve 3 and/or by-pass valve 6 and/or branch road flow control valve 10 according to the flow signal of flowmeter feedback.
Each flowmeter can preset a flow range value according to the needs of test, the flow that system detected when flowmeter is during less than default minimum value, to the little signal of programmable controller transmitted traffic, the aperture that the aperture of programmable controller controls main valve 3 becomes large and/or by-pass valve 6 diminishes.Opposite situation can same reason draw.Thereby the flow that can guarantee each road of system fluctuates in default scope.
And, also being provided with electro connecting pressure gauge 11 in main connecting line 4, electro connecting pressure gauge 11 is electrically connected with programmable controller, the superpressure that programmable controller sends according to electro connecting pressure gauge 11 or the aperture of under-voltage signal controlling stop valve 12.
Can need to preset a pressure limit value according to test equally during system works, when the pressure of system during less than default minimum pressure values, electro connecting pressure gauge 11 detects this signal and sends to programmable controller, the aperture of programmable controller controls stop valve 12 diminishes, and opposite situation can same reason draw.Thereby the pressure of the system of assurance fluctuates in the scope of setting.
For the temperature of Control experiment medium better, be provided with temperature sensor 13 in liquid reserve tank 1, be provided with well heater 14 around liquid reserve tank 1, temperature sensor 13 and well heater 14 are electrically connected with programmable controller respectively, the temperature signal that programmable controller sends according to temperature sensor 13, control heater 14 start heating or stopped heating.
System can preset a temperature range value according to the needs of test, the temperature that test(ing) medium 18 detected when temperature sensor 13 is during lower than default minimum temperature, send the temperature low signal to programmable controller, programmable controller controls well heater 14 is started working, for test(ing) medium 18 heats.In opposite situation, programmable controller controls well heater 14 quits work.Thereby the temperature of the system of assurance fluctuates in the scope of setting.On the other hand, system can preheat test(ing) medium 18 before test, so that test(ing) medium 18 reaches the temperature range that test is scheduled to.At first, programmable controller controls well heater 14 is started working, main valve 3 is closed, by-pass valve 6 is opened, pump 2 is started working.This moment, test(ing) medium 18 just circulated along the main connecting line 41 between liquid reserve tank and pump and bypass line 5, and the test(ing) medium 18 that while well heater 14 is circulating to this heats.This type of heating can be so that the heating of test(ing) medium 18 be more even and saved the time.After temperature that temperature sensor 13 detects test(ing) medium 18 reached default scope, PLC Control System started test.Certainly, also can not utilize described bypass line to carry out circulating-heating to test(ing) medium, but only by well heater, it be carried out static heating.
In addition, the below of each heat exchanger 9 arranges respectively a gatherer 15.This gatherer 15 is used for collecting the test(ing) medium 18 that process of the test heat exchanger 9 is revealed.And the below of each heat exchanger 9 arranges respectively a gatherer 15, can detect and tell the heat exchanger 9 that test(ing) medium 18 leakages occur.
Particularly, gatherer 15 is up big and down small structure, comprise top and the cross-sectional area bottom less than the cross-sectional area on top that can hold whole heat exchanger 9, bottom has been deposited a certain amount of test(ing) medium 18 in advance, and floating on test(ing) medium 18 have a floatation type sensor 17.The floatation type sensor here can be the float-ball type sensor.
Further, floatation type sensor 17 is electrically connected with programmable controller, the signal of the level change that programmable controller sends according to floatation type sensor 17, and control system stops test, and shows the test branch road that level change occurs.
As long as when any one in the test branch road or the leakage of several generation test(ing) mediums 18, programmable controller can be realized automatic alarm, stop simultaneously test, can also show in the mode of pilot lamp the test branch road that level change occurs, namely show the test branch road of the leakage that test(ing) medium 18 occurs.Can save artificial inspection like this, and when heat exchanger 9 occurred to leak, system can immediately be found, thereby stop timely test, the idle work that after having avoided occurring to reveal, system is still done in operation, saved energy consumption when having improved work efficiency.
Preferably, test(ing) medium 18 is anti freezing solution.Because under the real vehicle state, what flow through heat exchanger 9 is exactly anti freezing solution, adopt anti freezing solution as test(ing) medium can be more practical simulation real vehicle state.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (13)
1. heat exchanger internal corrosion testing table, comprise the liquid reserve tank, pump and the heat exchanger that are connected successively by main connecting line, it is characterized in that, and the main connecting line between described liquid reserve tank and described pump has been arranged in parallel bypass line, and is provided with the main flow variable valve at least one of the main connecting line between described pump and heat exchanger and described bypass line.
2. heat exchanger internal corrosion testing table according to claim 1, is characterized in that, described main flow variable valve comprises the main valve in the main connecting line that is arranged between described pump and heat exchanger and/or is arranged on by-pass valve in bypass line.
3. heat exchanger internal corrosion testing table according to claim 1 and 2, is characterized in that, is provided with stop valve in described main connecting line, and described stop valve is arranged on the recovery end of described liquid reserve tank.
4. heat exchanger internal corrosion testing table according to claim 3, is characterized in that, has been arranged in parallel a plurality of test branch roads in described main connecting line, includes a heat exchanger in each described test branch road.
5. heat exchanger internal corrosion testing table according to claim 4, is characterized in that, the described heat exchanger in each described test branch road is connected respectively a branch road flow control valve is set.
6. heat exchanger internal corrosion testing table according to claim 5, it is characterized in that, also comprise programmable controller, described programmable controller is electrically connected with described main valve, described by-pass valve, described stop valve and each described branch road flow control valve respectively.
7. heat exchanger internal corrosion testing table according to claim 6, it is characterized in that, described main connecting line neutralizes in each described test branch road and is respectively arranged with flowmeter, described flowmeter is electrically connected with described programmable controller respectively, and described programmable controller is controlled the aperture of described main valve and/or described by-pass valve and/or described branch road flow control valve according to the flow signal of described flowmeter feedback.
8. heat exchanger internal corrosion testing table according to claim 6, it is characterized in that, be provided with electro connecting pressure gauge in described main connecting line, described electro connecting pressure gauge and described programmable controller are electrically connected, the superpressure that described programmable controller sends according to described electro connecting pressure gauge or the aperture of the described stop valve of under-voltage signal controlling.
9. heat exchanger internal corrosion testing table according to claim 6, it is characterized in that, be provided with temperature sensor in described liquid reserve tank, be provided with well heater around described liquid reserve tank, described temperature sensor and described well heater are electrically connected with described programmable controller respectively, the temperature signal that described programmable controller sends according to described temperature sensor, control described well heater and start heating or stopped heating.
10. heat exchanger internal corrosion testing table according to claim 6, is characterized in that, the below of each described heat exchanger arranges respectively a gatherer.
11. heat exchanger internal corrosion testing table according to claim 10, it is characterized in that, described gatherer is up big and down small structure, comprise top and the cross-sectional area bottom less than the cross-sectional area on top that can hold whole heat exchanger, described bottom has been deposited a certain amount of test(ing) medium in advance, and floating on described test(ing) medium have a floatation type sensor.
12. heat exchanger internal corrosion testing table according to claim 11, it is characterized in that, described floatation type sensor and described programmable controller are electrically connected, the signal of the level change that described programmable controller sends according to described floatation type sensor, control system stops test, and shows the test branch road that level change occurs.
13. heat exchanger internal corrosion testing table according to claim 11 is characterized in that described test(ing) medium is anti freezing solution.
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| CN2013103271000A CN103398938A (en) | 2013-07-30 | 2013-07-30 | Internal corrosion test bed for heat exchanger |
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| CN2013103271000A CN103398938A (en) | 2013-07-30 | 2013-07-30 | Internal corrosion test bed for heat exchanger |
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| WO2020101463A1 (en) * | 2018-11-14 | 2020-05-22 | Université Internationale de RABAT | Test stand for thermo-hydraulic characterization of a tubular exchanger |
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Application publication date: 20131120 |